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19-0879; Rev 0; 7/07
+5.0V, 15kV ESD-Protected, Half-Duplex/ Full-Duplex, RS-485 Transceiver in DFN
General Description
The MAX13181E-MAX13184E are full-duplex and selectable half-/full-duplex RS-485 transceivers in a tiny 2mm x 2mm DFN package. These devices are designed for space-constrained applications by including extended ESD protection to 15kV per Human Body Model (HBM) and integrating pullup/pulldown resistors on the DE, RE and H/F inputs to reduce external components. The MAX13182E/MAX13184E feature a low-current shutdown mode for power-sensitive applications. These devices have a 1/8 unit-load input receiver that allows up to 256 transceivers on the bus. The MAX13181E/MAX13182E feature reduced slew-rate drivers to minimize EMI and reflections that are caused by improperly terminated cables. The slew-rate limited MAX13181E/MAX13182E allow error-free data transmission up to 250kbps. The MAX13183E/MAX13184E feature full-speed drivers, allowing data rates of up to 16Mbps. The MAX13182E/MAX13184E are configured for fullduplex operation, while the MAX13181E/MAX13183E feature pin-selectable half- or full-duplex operation. All driver outputs and receiver inputs include extended ESD protection. The MAX13181E-MAX13184E are available in a tiny 10pin, 2mm x 2mm DFN. The MAX13183E/MAX13184E are also available in industry-standard 14-pin SO packages. The devices operate over the extended -40C to +85C temperature range.
Features
Available in Tiny, 10-Pin, 2mm x 2mm, DFN and 14-Pin SO Packages +5.0V Operation Extended ESD Protection 15kV Human Body Model 12kV IEC 61000-4-2 Air-Gap Disharge 6kV IEC 61000-4-2 Contact Disharge Slew-Rate Limiting Facilitates Error-Free Data Transmission (MAX13181E/MAX13182E) 2.5A (typ) Low-Current Shutdown Mode 1/8-Unit Load Allows Up to 256 Transceivers on the Bus
MAX13181E-MAX13184E
Pin Configurations
TOP VIEW A 10 B 9 Z 8 Y 7 GND 6 A 10 B 9 Z 8 Y 7 GND 6
MAX13181E MAX13183E
+ 1 2 3 DFN 4 5 DI VCC RO H/F DE + 1
MAX13182E MAX13184E
2 3 RE DFN 4 DE 5 DI
Applications
Industrial Control Motor Drive Control Telecom Security System Instrumentation
VCC RO
Pin Configurations continued at end of data sheet.
Selector Guide
PART MAX13181E MAX13182E MAX13183E MAX13184E HALF/FULL DUPLEX Selectable Full Selectable Full MAXIMUM DATA RATE 250 kbps 250 kbps 16 Mbps 16 Mbps SLEW-RATE LIMITED Yes Yes No No LOW-POWER SHUTDOWN No Yes No Yes RECEIVER ENABLE No Yes No Yes
Ordering Information
PART MAX13181EELB+ MAX13182EELB+ MAX13182EESD+ TEMP RANGE -40C to +85C -40C to +85C -40C to +85C PIN-PACKAGE 10 DFN 10 DFN 14 SO TOP MARK ABC ABD -- PKG CODE L1022-1 L1022-1 S14-1
+Denotes a lead-free package.
Ordering Information continued at end of data sheet.
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________________________________________________________________ Maxim Integrated Products
For pricing delivery, and ordering information please contact Maxim Direct at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com.
+5.0V, 15kV ESD-Protected, Half-Duplex/ Full-Duplex, RS-485 Transceiver in DFN MAX13181E-MAX13184E
ABSOLUTE MAXIMUM RATINGS
(All voltages referenced to GND.) Supply Voltage (VCC) ...............................................-0.3V to +6V Control Voltage (RE, DE, DI, H/F).............................-0.3V to +6V Driver Output Voltage (A, B, Y, Z) ..........................-8V to +12.5V Receiver Input Voltage (A, B).................................-8V to +12.5V Receiver Input Voltage Full-Duplex (A, B)..............-8V to +12.5V Receiver Output Voltage (RO)................... -0.3V to (VCC + 0.3V) Short-Circuit Duration (A, B, Y, Z) to GND .................Continuous Continuous Power Dissipation (TA = +70C) 10-Pin DFN (derate 5mW/C above +70C ) .............403mW 14-Pin SO (derate 8.3mW/C above +70C )...............667mW Operating Temperature Range ...........................-40C to +85C Storage Temperature Range .............................-65C to +150C Junction Temperature ......................................................+150C Lead Temperature (soldering, 10s) .................................+300C
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
DC ELECTRICAL CHARACTERISTICS
(VCC = +5V 10%, TA =TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5V and TA = +25C.) (Note 1)
PARAMETER DRIVER RL = 100 (RS422), Figure 1 Differential Driver Output Change in Magnitude of Differential Output Voltage Driver Common-Mode Output Voltage Change in Magnitude of Common-Mode Voltage Input-High Voltage Input-Low Voltage Input Hysteresis Internal Pullup Resistance Internal Pulldown Resistance Output Leakage (Y and Z) Full-Duplex Driver Short-Circuit Output Current Threshold (Note 3) Driver Short-Circuit Foldback Output Current (Note 3) Thermal-Shutdown Threshold Thermal-Shutdown Hysteresis Input Current (A and B) VOD RL = 54 (RS485), Figure 1 No load VOD VOC VOC VIH VIL VHYS RIN_UP RIN_DWN IO IOSD IOSDF TTS TTSH IA, B DE = GND, VCC = GND or 5.5V VIN = +12V VIN = -7V -100 RL = 100 or 54, Figure 1, (Note 2) RL = 100 or 54, Figure 1 RL = 100 or 54, Figure 1, (Note 2) DE, DI, RE, H/F DE, DI, RE, H/F DE, DI, RE, H/F Internal pullup RE Internal pulldown DE, H/F DE = GND, VCC = GND or 5.5V 0 VOUT 12V -7 VOUT VCC (VCC - 1V) VOUT 12V -7V VOUT 1V 0 VOUT 12V 140 15 125 VIN = +12V VIN = -7V -100 40 -250 20 -20 250 -40 125 125 100 400 400 125 2 0.8 VCC / 2 2 1.5 VCC VCC VCC 0.2 3 0.2 V V V V V V V mV k k A mA mA C C A SYMBOL CONDITIONS MIN TYP MAX UNITS
2
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+5.0V, 15kV ESD-Protected, Half-Duplex/ Full-Duplex, RS-485 Transceiver in DFN
DC ELECTRICAL CHARACTERISTICS (continued)
(VCC = +5V 10%, TA =TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5V and TA = +25C.) (Note 1)
PARAMETER RECEIVER Receiver Differential Threshold Voltage Receiver Input Hysteresis RO Output-High Voltage RO Output-Low Voltage Tri-State Output Current at Receiver Receiver-Input Resistance Receiver-Output Short-Circuit Current SUPPLY CURRENT No load, RE = 0, DE = VCC Supply Current ICC No load, RE = VCC, DE = VCC No load, RE = 0V, DE = 0 or leave unconnected RE = VCC or leave unconnected, DE = GND or leave unconnected Human Body Model ESD Protection for Y, Z, A and B IEC 61000-4-2 Contact Discharge IEC 61000-4-2 Air-Gap Discharge 2 2 2 2.5 3 3 3 10 A mA VTH VTH VOH VOL IOZR RIN IOSR -7V VCM +12V, Figure 2 VA + VB = 0, Figure 2 IO = -1mA, Figure 2 IO = 1mA, Figure 2 0 VO VCC, Figure 2 -7V VCM +12V, Figure 2 0 VRO VCC, Figure 2 -1 96 -80 +80 VCC 0.6 0.4 +1 -200 0 25 +200 mV mV V V A k mA SYMBOL CONDITIONS MIN TYP MAX UNITS
MAX13181E-MAX13184E
Shutdown Current (MAX13182E/MAX13184E Only) ESD PROTECTION
ISHDN
15 6 12 kV
DRIVER SWITCHING CHARACTERISTICS--MAX13181E/MAX13182E (SLEW-RATE LIMITED TO 250kbps)
(VCC = +5V 10%, TA =TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5V and TA = +25C.) (Note 1)
PARAMETER Driver Propagation Delay Driver Differential Output Rise or Fall Time Differential Driver Output Skew (tDPLH - tDPHL) Maximum Data Rate Driver Enable to Output High Driver Enable to Output Low Driver Disable Time from Low Driver Disable Time from High Driver Enable from Shutdown to Output High Driver Enable from Shutdown to Output Low Time to Shutdown tDZH tDZL tDLZ tDHZ tDZH(SHDN) tDZL(SHDN) tSHDN Figure 4a Figure 4b Figure 4b Figure 4a (MAX13182E) Figure 4a (MAX13182E) Figure 4b (MAX13182E) 50 200 SYMBOL tDPLH tDPHL tDR, tDF tDSKEW CONDITIONS CL = 50pF, RL = 54, Figure 3 CL = 50pF, RL = 54, Figure 3 CL = 50pF, RL = 54, Figure 3 CL = 50pF, RL = 54, Figure 3 250 2500 2500 100 100 5500 5500 600 MIN 200 200 400 TYP MAX 1000 1000 1200 140 UNITS ns ns ns kbps ns ns ns ns ns ns ns
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+5.0V, 15kV ESD-Protected, Half-Duplex/ Full-Duplex, RS-485 Transceiver in DFN MAX13181E-MAX13184E
DRIVER SWITCHING CHARACTERISTICS--MAX13183E/MAX13184E (MAXIMUM DATA RATE OF 16Mbps)
(VCC = +5V 10%, TA =TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5V and TA = +25C.) (Note 1)
PARAMETER Driver Propagation Delay Driver Differential Output Rise or Fall Time Differential Driver Output Skew (tDPLH - tDPHL) Maximum Data Rate Driver Enable to Output-High Driver Enable to Output-Low Driver Disable Time from Low Driver Disable Time from High Driver Enable from Shutdown to Output High Driver Enable from Shutdown to Output Low Time to Shutdown tDZH tDZL tDLZ tDHZ tDZH (SHDN) tDZL (SHDN) tSHDN Figures 1 and 4a Figures 1 and 4b Figures 1 and 4b Figures 1 and 4a Figures 1 and 4a (MAX13184E) Figures 1 and 4b (MAX13184E) (MAX13184E) 50 200 SYMBOL tDPLH tDPHL tDR, tDF tDSKEW CONDITIONS CL = 50pF, RL = 54, Figure 3 CL = 50pF, RL = 54, Figure 3 CL = 50pF, RL = 54, Figure 3 CL = 50pF, RL = 54, Figure 3 16 50 50 50 50 2200 2200 600 MIN TYP MAX 25 25 15 8 UNITS ns ns ns Mbps ns ns ns ns ns ns ns
RECEIVER SWITCHING CHARACTERISTICS
(VCC = +5V 10%, TA =TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5V and TA = +25C.) (Note 1)
PARAMETER Receiver Propagation Delay Receiver Output Skew (tRPLH - tRPHL) Maximum Data Rate Receiver Enable to Output Low Receiver Enable to Output High Receiver Disable Time from Low Receiver Disable Time from High Receiver Enable from Shutdown to Output High Receiver Enable from Shutdown to Output Low tRZL tRZH tRLZ tRHZ tRZH (SHDN) tRZL (SHDN) (MAX13182E/MAX13184E) Figures 2 and 6 (MAX13182E/MAX13184E) Figures 2 and 6 (MAX13182E/MAX13184E) Figures 2 and 6 (MAX13182E/MAX13184E) Figures 2 and 6 (MAX13182E/MAX13184E) Figures 2 and 6 (MAX13182E/MAX13184E) Figures 2 and 6 SYMBOL tRPLH tRPHL tRSKEW CONDITIONS CL = 15pF, Figure 5 CL = 15pF, Figure 5 16 50 50 50 50 2200 2200 MIN TYP 40 40 MAX 75 75 8 UNITS ns ns Mbps ns ns ns ns ns ns
Note 1: All currents into the device are positive. All currents out of the device are negative. All voltages are referred to device ground, unless otherwise noted. DFN devices are production tested at +25C. Overtemperature limits are guaranteed by design. Note 2: VOD and VOC are the changes in VOD and VOC, respectively, when the DI input changes state. Note 3: The short-circuit output current applies to peak current just prior to foldback current limiting. The short-circuit foldback output current applies during current limiting to allow a recovery from bus contention. 4 _______________________________________________________________________________________
+5.0V, 15kV ESD-Protected, Half-Duplex/ Full-Duplex, RS-485 Transceiver in DFN MAX13181E-MAX13184E
Y RL A (Y) B (Z) CL RL 2 VOC GND Z VOH VOL
2
RO CL
VOD
Figure 1. Driver Differential Output
Figure 2. Receiver Differential Input
3V DI 0 1.5V tDPLH tDPHL 1/2 VO
Z VO Y 1/2 VO VO VDIFF 0 -VO VDIFF = V (Y) - V (Z) 10% tDR tDSKEW = | tDPLH - tDPHL 90% tDF 90% 10%
Figure 3. Driver Propagation Delay
S1 0 OR 3V D CL 50pF GENERATOR 50 OUT RL = 500
VCC DE tDZH , tDZH(SHDN) 0 VCC / 2
0.5V OUT VOM = (0 + VOH) / 2
VOH 0
tDHZ
Figure 4a. Driver Enable and Disable Times (tDHZ, tDZH, tDZH(SHDN))
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+5.0V, 15kV ESD-Protected, Half-Duplex/ Full-Duplex, RS-485 Transceiver in DFN MAX13181E-MAX13184E
VCC
RL = 500 S1 0 OR 3V D DE GENERATOR 50 CL 50pF OUT
VCC DE tDZL , tDZL(SHDN) 0 tDLZ VCC OUT VOL VOM = (VOL + VCC) / 2 0.5V VOH VCC / 2
Figure 4b. Driver Enable and Disable Times (tDLZ, tDZL, tDZL(SHDN))
A (Y) B (Z) VOH RO VOL 1.5V tRSKEW = | tRPLH - tRPHL | THE RISE TIME AND FALL TIME OF INPUTS A, B, Y AND Z < 4ns tRPLH tRPHL
+1V -1V
Figure 5. Receiver Propagation Delay
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+5.0V, 15kV ESD-Protected, Half-Duplex/ Full-Duplex, RS-485 Transceiver in DFN MAX13181E-MAX13184E
S1 +1.5V -1.5V S3 1k VID R CL 15pF 5V
S2
GENERATOR
50
S1 OPEN S2 CLOSED S3 = +1.5V 5V
S1 CLOSED S2 OPEN S3 = -1.5V 5V 1.5V
RE tRZH, tRZH(SHDN) RO
0
RE
0 tRZL, tRZL(SHDN)
VOH VOH / 2 0 RO
VCC (VOL + VOH) / 2 VOL
S1 OPEN S2 CLOSED S3 = +1.5V 2.5V tRHZ
5
S1 CLOSED S2 OPEN S3 = -1.5V 2.5V
5V
RE
0
RE tRLZ
0
VOH 0.5V RO 0 RO 0.5V
5V
VOL
Figure 6. Receiver Disable Time
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+5.0V, 15kV ESD-Protected, Half-Duplex/ Full-Duplex, RS-485 Transceiver in DFN MAX13181E-MAX13184E
Typical Operating Characteristics
(VCC = +5V, TA = 25C, unless otherwise noted.)
SUPPLY CURRENT vs. TEMPERATURE
MAX13181E-4E toc01
OUTPUT CURRENT vs. RECEIVER OUTPUT HIGH VOLTAGE
MAX13181E-4E toc02
OUTPUT CURRENT vs. RECEIVER OUTPUT LOW VOLTAGE
MAX13181E-4E toc03
5
4 SUPPLY CURRENT (mA)
NO LOAD RE = VCC DE = VCC
20
30
16 OUTPUT CURRENT (mA)
24 OUTPUT CURRENT (mA)
3
12
18
2
8
12
1
4
6
0 -40 -15 10 35 60 85 TEMPERATURE (C)
0 0 1 2 3 4 5 RECEIVER OUTPUT HIGH VOLTAGE (V)
0 0 1 2 3 4 5 RECEIVER OUTPUT LOW VOLTAGE (V)
RECEIVER OUTPUT HIGH VOLTAGE vs. TEMPERATURE
MAX13181E-4E toc04
RECEIVER OUTPUT LOW VOLTAGE vs. TEMPERATURE
MAX13181E-4E toc05
DRIVER DIFFERENTIAL OUTPUT CURRENT vs. DIFFERENTIAL OUTPUT VOLTAGE
DRIVER DIFFERENTIAL OUTPUT CURRENT (mA)
MAX13181E-4E toc06
5.4 RECEIVER OUTPUT HIGH VOLTAGE (V) 5.2 5.0 4.8 4.6 4.4 4.2 4.0
IO = -1mA
0.5 RECEIVER OUTPUT LOW VOLTAGE (V)
IO = -1mA
80
0.4
60
0.3
40
0.2
0.1
20
0 -40 -15 10 35 60 85 -40 -15 10 35 60 85 TEMPERATURE (C) TEMPERATURE (C)
0 0 1 2 3 4 5 DIFFERENTIAL OUTPUT VOLTAGE (V)
DRIVER DIFFERENTIAL OUTPUT VOLTAGE vs. TEMPERATURE
DRIVER DIFFERENTIAL OTUPUT VOLTAGE (V) RL = 54
MAX13181E-4E toc07
OUTPUT CURRENT vs. TRANSMITTER OUTPUT HIGH VOLTAGE
MAX13181E-4E toc08
OUTPUT CURRENT vs. TRANSMITTER OUTPUT LOW VOLTAGE
MAX13181E-4E toc09
5
80
120 100 OUTPUT CURRENT (mA) 80 60 40 20
4
3
OUTPUT CURRENT (mA)
60
40
2
1
20
0 -40 -15 10 35 60 85 TEMPERATURE (C)
0 -8 -6 -4 -2 0 2 4 6 TRANSMITTER OUTPUT HIGH VOLTAGE (V)
0 0 2 4 6 8 10 12 TRANSMITTER OUTPUT LOW VOLTAGE (V)
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+5.0V, 15kV ESD-Protected, Half-Duplex/ Full-Duplex, RS-485 Transceiver in DFN
Typical Operating Characteristics (continued)
(VCC = +5V, TA = 25C, unless otherwise noted.)
SHUTDOWN CURRENT vs. TEMPERATURE
MAX13181E-4E toc10
MAX13181E-MAX13184E
DRIVER PROPAGATION DELAY vs. TEMPERATURE (250kbps) (MAX13182E)
MAX13181E-4E toc11
DRIVER PROPAGATION DELAY vs. TEMPERATURE (16Mbps) (MAX13184E)
CL = 50pF RL = 54
MAX13181E-4E toc12
10
700 DRIVER PROPAGATION DELAY (ns)
CL = 50pF RL = 54
50 DRIVER PROPAGATION DELAY (ns)
SHUTDOWN CURRENT (A)
8
600 tDPHL
40
6
500
30 tDPHL tPDLH
4
400 tPDLH 300
20
2
10
0 -40 -15 10 35 60 85 TEMPERATURE (C)
200 -40 -15 10 35 60 85 TEMPERATURE (C)
0 -40 -15 10 35 60 85 TEMPERATURE (C)
RECEIVER PROPAGATION DELAY vs. TEMPERATURE (250kbps) (MAX13182E)
MAX13181E-4E toc13
RECEIVER PROPAGATION DELAY vs. TEMPERATURE (16Mbps) (MAX13184E)
MAX13181E-4E toc14
RECEIVER PROPAGATION DELAY (250kbps) (MAX13182E)
MAX13181E-4E toc15
50 RECEIVER PROPAGATION DELAY (ns)
CL = 15pF
50 RECEIVER PROPAGATION DELAY (ns)
CL = 15pF
CL = 15pF
40 tRPLH
40 tRPLH
VA - V B 2V/div
30
30
20 tRPHL
20 tRPHL 10 RO 2V/div
10
0 -40 -15 10 35 60 85 TEMPERATURE (C)
0 -40 -15 10 35 60 85 400ns/div TEMPERATURE (C)
DRIVER PROPAGATION DELAY (250kbps) (MAX13182E)
MAX13181E-4E toc16
RECEIVER PROPAGATION DELAY (16Mbps) (MAX13184E)
MAX13181E-4E toc17
DRIVER PROPAGATION DELAY (16Mbps) (MAX13184E)
MAX13181E-4E toc18
CL = 50pF RL = 54 DI 2V/div
CL = 15pF VA - V B 2V/div
CL = 50pF RL = 54 DI 2V/div
VY - V Z 2V/div
RO 2V/div
V Y - VZ 2V/div
400ns/div
10ns/div
10ns/div
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+5.0V, 15kV ESD-Protected, Half-Duplex/ Full-Duplex, RS-485 Transceiver in DFN MAX13181E-MAX13184E
Functional Tables
MAX13182E/MAX13184E
TRANSMITTING INPUT RE X X 0 1 DE 1 1 0 0 DI 0 1 X X RECEIVING INPUT RE 0 0 1 1 DE X X 1 0 A-B 200mV -200mV X X OUTPUT RO 1 0 High impedance Shutdown (high impedance) Z 1 0 High impedance OUTPUT Y 0 1 High impedance DE 1 1 0 INPUT DI 0 1 X Z 1 0 High impedance RECEIVING INPUT H/F 0 0 1 1 DE X X 0 0 A-B 200mV -200mV X X Y-Z X X 200mV -200mV OUTPUT RO 1 0 1 0
MAX13181E/MAX13183E
TRANSMITTING OUTPUT Y 0 1 High impedance
Shutdown (high impedance)
X = Don't care.
Functional Diagram
VCC
MAX13182E MAX13184E
A R VCC RIN_UP B
VCC
MAX13181E MAX13183E
A
RO
RO
B RE H/F RIN_DWN DE RIN_DWN DI Z DI D Y DE RIN_DWN Z Y
GND
GND
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+5.0V, 15kV ESD-Protected, Half-Duplex/ Full-Duplex, RS-485 Transceiver in DFN
Pin Description
MAX13181E/ MAX13183E MAX13182E/ MAX13184E MAX13182E/ MAX13184E SO 1 2 3 14 2 3 VCC RO RE Positive Supply, VCC = +4.5V to +5.5V. Bypass VCC with a 0.1F ceramic capacitor to ground. Receiver Output. When RE is low and (A-B) 200mV, RO is high; if (A-B) -200mV, RO is low. Receiver Output Enable. Drive RE low to enable RO. Drive RE high to disable the receiver. RE input has an internal pullup resistor. Half-/Full-Duplex Selector Input. Connect H/F to VCC for half-duplex mode. Leave H/F unconnected or connect H/F to GND for full-duplex mode. H/F input has an internal pulldown resistor. Driver Output Enable. Drive DE high to enable the driver. Driver output is high impedance when DE is low. DE input has an internal pulldown resistor. Driver Input. With DE high, a low on DI forces noninverting output low and inverting output high. Similarly, a high on DI forces noninverting output high and inverting output low. Ground Noninverting Driver Output. (Also noninverting receiver input in half-duplex mode.) Inverting Driver Output. (Also inverting receiver input in half-duplex mode.) Inverting Receiver Input Noninverting Receiver Input No Connection. N.C. is not internally connected. NAME FUNCTION
MAX13181E-MAX13184E
DFN 1 2 --
3
--
--
H/F
4
4
4
DE
5 6 7 8 9 10 --
5 6 7 8 9 10 --
5 6, 7 9 10 11 12 1, 8, 13
DI GND Y Z B A N.C.
Detailed Description
The MAX13181E-MAX13184E high-speed transceivers for RS-485 communication contain one driver and one receiver. These devices feature 1/8 unit-load input impedance that allows up to 256 receivers on the bus. All devices feature integrated pullup/pulldown resistors on the DE, RE, and H/F inputs to reduce external components. The MAX13182E/MAX13184E feature a lowcurrent shutdown mode for power-sensitive applications. The MAX13181E/MAX13182E feature reduced slew-rate drivers to minimize EMI and reflections that are caused by improperly terminated cables. The slew-rate limited MAX13181E/MAX13182E allow error-free transmission up to 250Kbps. The MAX13183E/MAX13184E feature full-speed drivers allowing data rate of up to 16Mbps. The MAX13182E/MAX13184E are configured for fullduplex operation. The MAX13181E/MAX13183E feature selectable half- or full-duplex operation by driving H/F input high or low, respectively. All devices operate from a single +5.0V supply.
15kV ESD Protection
As with all Maxim devices, ESD-protection structures are incorporated on all pins to protect against electrostatic discharges encountered during handling and assembly. The driver outputs of the MAX13181E- MAX13184E family have extra protection against static electricity. Maxim's engineers have developed state-ofthe-art structures to protect these driver outputs against ESD of 15kV with VCC = 5V, and regardless of the logic state of DE and DI. The ESD-protected pins are tested with reference to the ground pin in a powered-down condition. They are tested to 15kV using the Human Body Model, 12kV using the IEC 61000-4-2 Air-Gap Discharge Model, and to 6kV using the IEC 61000-4-2 Contact Discharge Model.
ESD Test Conditions ESD performance depends on a variety of conditions. Contact Maxim for a reliability report that documents test setup, test methodology, and test results.
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+5.0V, 15kV ESD-Protected, Half-Duplex/ Full-Duplex, RS-485 Transceiver in DFN MAX13181E-MAX13184E
RC 1M CHARGE-CURRENTLIMIT RESISTOR HIGHVOLTAGE DC SOURCE RD 1500 DISCHARGE RESISTANCE DEVICE UNDER TEST
IP 100% 90% AMPS
Ir
PEAK-TO-PEAK RINGING (NOT DRAWN TO SCALE)
Cs 100pF
STORAGE CAPACITOR
36.8% 10% 0 0 tRL TIME tDL CURRENT WAVEFORM
Figure 7a. Human Body ESD Test Model
RC 50M TO 100M CHARGE-CURRENTLIMIT RESISTOR HIGHVOLTAGE DC SOURCE RD 330 DISCHARGE RESISTANCE DEVICE UNDER TEST
Figure 7b. Human Body Current Waveform
I 100% 90% IPEAK
Cs 150pF
STORAGE CAPACITOR
10% tr = 0.7ns TO 1ns 30ns 60ns t
Figure 7c. IEC 1000-4-2 ESD Test Model
Figure 7d. IEC 1000-4-2 ESD Generator Current Waveform
Human Body Model Figure 7a shows the Human Body Model, and Figure 7b shows the current waveform it generates when discharged into a low impedance. This model consists of a 100pF capacitor charged to the ESD voltage of interest, which is then discharged into the test device through a 1.5k resistor. Machine Model The IEC 61000-4-2 standard covers ESD testing and performance of finished equipment. However, it does not specifically refer to integrated circuits. The MAX13485E/MAX13486E help equipment designs to meet IEC 61000-4-2, without the need for additional ESD protection components.
The major difference between tests done using the Human Body Model and IEC 61000-4-2 is higher peak current in IEC 61000-4-2 because series resistance is lower in the IEC 61000-4-2 model. Hence, the ESD withstand voltage measured to IEC 61000-4-2 is generally lower than that measured using the Human Body Model. Figure 10c shows the IEC 61000-4-2 model, and Figure 10d shows the current waveform for the IEC 61000-4-2 ESD Contact Discharge test.
Applications Information
256 Transceiver on the Bus
The standard RS-485 receiver input impedance is 12k (one-unit load), and the standard driver can drive up to 32 unit loads. The MAX13181E-MAX13184E family transceivers have a 1/8-unit load receiver input impedance (96k), allowing up to 256 transceivers to be connected in parallel on one communication line. Any combination of these devices and/or other RS-485 transceivers with a total of 32 unit loads or less can be connected to the line.
Reduced EMI and Reflections
The MAX13181E/MAX13182E are slew-rate limited, minimizing EMI and reducing reflections caused by improperly terminated cables. This slew-rate limited feature allows error-free data transmission up to 250kbps.
MAX13181E/MAX13183E Low-Power Shutdown Mode
The MAX13181E/MAX13183E feature low power shutdown mode. Low-power shutdown mode is initiated by bringing RE high and DE low. In shutdown, the devices typically draw only 2.5A (typ) of supply current. RE and DE can be driven simultaneously. If RE is high and
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+5.0V, 15kV ESD-Protected, Half-Duplex/ Full-Duplex, RS-485 Transceiver in DFN
DE is low for 200ns (typ), the devices are guaranteed to enter shutdown. Enable times tZH and tZL (see the Switching Characteristics) assume the devices are not in a low-power shutdown state. Enable times t ZH(SHDN) and t ZL(SHDN) assume the devices are in a shutdown state. It takes drivers and receivers longer to become enabled from lowpower shutdown mode (tZH(SHDN), tZL(SHDN)) than from driver-/receiver-disable mode (tZH, tZL).
MAX13181E-MAX13184E
A RO *RE DE Z DI (H/F) *RE FOR MAX13182E/MAX13184E D Y 120 DATA OUT R B 120 DATA IN
Line Length
The RS-485 standard covers line lengths up to 4000ft. For line lengths greater than 4000ft, use the repeater application shown in Figure 8.
(H/F for MAX13181E/ MAX13183E ONLY)
(FULL DUPLEX)
Figure 8. Line Repeater for MAX13181E-MAX13184E
Typical Applications
The MAX13181E-MAX13184E transceivers are designed for bidirectional data communications on multipoint bus transmission lines. The MAX13181E/MAX13183E can be used in either half-duplex or full-duplex configuration. The MAX13182E/MAX13184E are for full-duplex only. Figure 9 shows the typical network application circuit for half-duplex, and Figures 10 and 11 show typical network application circuits for full duplex. To minimize reflections, terminate the line at both ends in its characteristics impedance, and keep stub lengths off the main line as short as possible. The slew-rate-limited MAX13181E/MAX13182E are more tolerant of imperfect termination.
120 DI D DE VCC RO H/F R R B
120 B D DI DE
A
B
A
B
A
A R RO RE R
MAX13181E-MAX13184E CONFIGURED FOR HALFDUPLEX OPERATION
DI
D
D
DE
RO RE
DI
DE
RO RE
Figure 9. Typical Half-Duplex RS-485 Network
______________________________________________________________________________________
13
+5.0V, 15kV ESD-Protected, Half-Duplex/ Full-Duplex, RS-485 Transceiver in DFN MAX13181E-MAX13184E
A RO DE Z DI H/F Y Z B A Y Z B A D 120 Y A 120 R 120 B Z B R DE RE RO 120 Y D DI
MAX13181E/MAX13183E CONFIGURED FOR FULLDUPLEX OPERATION
R D D
R
DI
DE RE RO
DI
DE RE RO
Figure 10. Typical Full-Duplex RS-485 Network
A RO DE Z DI D 120 Y 120 R 120 B 120
Y D Z B R A Y Z B A Y Z B A DE RE RO DI
MAX13182E/MAX13184E CONFIGURED FOR FULLDUPLEX OPERATION
R D D
R
DI
DE RE RO
DI
DE RE RO
Figure 11. Typical Full-Duplex RS-485 Network
14
______________________________________________________________________________________
+5.0V, 15kV ESD-Protected, Half-Duplex/ Full-Duplex, RS-485 Transceiver in DFN
Ordering Information (continued)
PART MAX13183EELB+ MAX13184EELB+ MAX13184EESD+ TEMP RANGE -40C to +85C -40C to +85C -40C to +85C PIN-PACKAGE 10 DFN 10 DFN 14 SO TOP MARK ABA ABB -- PKG CODE L1022-1 L1022-1 S14-1
MAX13181E-MAX13184E
+Denotes a lead-free package.
Pin Configurations (continued)
TOP VIEW N.C. 1 RO 2 RE 3 DE 4 DI 5 GND 6 GND 7 SO + 14 VCC 13 N.C.
Chip Information
PROCESS: BiCMOS
MAX13182E MAX13184E
12 A 11 B 10 Z 9Y 8 N.C.
______________________________________________________________________________________
15
+5.0V, 15kV ESD-Protected, Half-Duplex/ Full-Duplex, RS-485 Transceiver in DFN MAX13181E-MAX13184E
Package Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.) 6, 8, 10L UDFN.EPS
A
1 2
D
A
e
b
N
XXXX XXXX XXXX
SOLDER MASK COVERAGE
E
PIN 1 0.10x45
L
PIN 1 INDEX AREA SAMPLE MARKING 7 1 A A
L1
(N/2 -1) x e)
C L
C L
b A A2 A1
L e
EVEN TERMINAL
L e
ODD TERMINAL
PACKAGE OUTLINE, 6, 8, 10L uDFN, 2x2x0.80 mm
-DRAWING NOT TO SCALE-
21-0164
16
______________________________________________________________________________________
+5.0V, 15kV ESD-Protected, Half-Duplex/ Full-Duplex, RS-485 Transceiver in DFN
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.)
MAX13181E-MAX13184E
COMMON DIMENSIONS SYMBOL A A1 A2 D E L L1 MIN. 0.70 0.15 0.020 1.95 1.95 0.30 NOM. 0.75 0.20 0.025 2.00 2.00 0.40 0.10 REF. MAX. 0.80 0.25 0.035 2.05 2.05 0.50
PACKAGE VARIATIONS PKG. CODE L622-1 L822-1 L1022-1 N 6 8 10 e 0.65 BSC 0.50 BSC 0.40 BSC b 0.300.05 0.250.05 0.200.03 (N/2 -1) x e 1.30 REF. 1.50 REF. 1.60 REF.
PACKAGE OUTLINE, 6, 8, 10L uDFN, 2x2x0.80 mm
-DRAWING NOT TO SCALE-
21-0164
A
2
2
______________________________________________________________________________________
17
+5.0V, 15kV ESD-Protected, Half-Duplex/ Full-Duplex, RS-485 Transceiver in DFN MAX13181E-MAX13184E
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.)
INCHES DIM A A1 B C e E H L MAX MIN 0.069 0.053 0.010 0.004 0.014 0.019 0.007 0.010 0.050 BSC 0.150 0.157 0.228 0.244 0.016 0.050
MILLIMETERS MAX MIN 1.35 1.75 0.10 0.25 0.35 0.49 0.19 0.25 1.27 BSC 3.80 4.00 5.80 6.20 0.40 1.27
N
E
H
VARIATIONS:
1
INCHES
MILLIMETERS MIN 4.80 8.55 9.80 MAX 5.00 8.75 10.00 N MS012 8 AA 14 AB 16 AC
TOP VIEW
DIM D D D
MIN 0.189 0.337 0.386
MAX 0.197 0.344 0.394
D A e B A1 L C
0-8
FRONT VIEW
SIDE VIEW
PROPRIETARY INFORMATION TITLE:
PACKAGE OUTLINE, .150" SOIC
APPROVAL DOCUMENT CONTROL NO. REV.
21-0041
B
1 1
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
18 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 (c) 2007 Maxim Integrated Products
SPRINGER
is a registered trademark of Maxim Integrated Products, Inc.
SOICN .EPS

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