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19-1479; Rev 1; 7/99
15kV ESD-Protected, 0.5A, +3V to +5.5V, 1.5Mbps RS-232 Receivers in SOT23-5
General Description
The MAX3180E-MAX3183E single RS-232 receivers in a SOT23-5 package are designed for space- and costconstrained applications requiring minimal RS-232 communications. The receiver inputs are protected to 15kV using IEC 1000-4-2 Air-Gap Discharge, to 8kV using IEC 1000-4-2 Contact Discharge, and to 15kV per the Human Body Model, ensuring compliance with international standards. The devices minimize power and heat dissipation by consuming only 0.5A supply current from a +3.0V to +5.5V supply, and they guarantee true RS-232 performance up to a 1.5Mbps data rate. The MAX3180E/ MAX3182E feature a three-state TTL/CMOS receiver output that is controlled by an EN logic input. The MAX3181E/MAX3183E feature an INVALID output that indicates valid RS-232 signals at the receiver input for applications requiring automatic system wake-up. The MAX3182E/MAX3183E have a noninverting output, while the MAX3180E/MAX3181E have a standard inverting output. o Tiny SOT23-5 Package o ESD-Protected RS-232 Input 15kV--Human Body Model 8kV--IEC 1000-4-2, Contact Discharge 15kV--IEC 1000-4-2, Air-Gap Discharge o 0.5A Supply Current o 1.5Mbps Guaranteed Data Rate o Meets EIA/TIA-232 and V.28/V.24 Specifications Down to VCC = +3.0V o INVALID Output Indicates Valid RS-232 Signal at Receiver Input (MAX3181E/MAX3183E) o Three-State TTL/CMOS Receiver Output (MAX3180E/MAX3182E) o Noninverting RS-232 Output (MAX3182E/MAX3183E)
Features
MAX3180E-MAX3183E
Applications
Diagnostic Ports Telecommunications Networking Equipment Set-Top Boxes Digital Cameras Hand-Held Equipment
PART
Ordering Information
TEMP. RANGE PINPACKAGE 5 SOT23-5 5 SOT23-5 5 SOT23-5 5 SOT23-5 TOP MARK ACHB ACHC ACHD ACHE
MAX3180EEUK-T -40C to +85C MAX3181EEUK-T -40C to +85C MAX3182EEUK-T -40C to +85C MAX3183EEUK-T -40C to +85C
Pin Configurations/Functional Diagrams appear at end of data sheet.
Selector Guide
PART MAX3180E MAX3181E MAX3182E MAX3183E ESD PROTECTION (kV) 15 15 15 15 PACKAGE SOT23-5 SOT23-5 SOT23-5 SOT23-5 SUPPLY CURRENT (A) 0.5 0.5 0.5 0.5 EN INPUT -- -- INVALID OUTPUT -- -- INVERTING ROUT -- -- NONINVERTING ROUT -- --
________________________________________________________________ Maxim Integrated Products
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15kV ESD-Protected, 0.5A, +3V to +5.5V, 1.5Mbps RS-232 Receivers in SOT23-5 MAX3180E-MAX3183E
ABSOLUTE MAXIMUM RATINGS
VCC to GND ..............................................................-0.3V to +6V RIN to GND ..........................................................................25V EN, ROUT, INVALID to GND ......................-0.3V to (VCC + 0.3V) Continuous Power Dissipation (TA = +70C) SOT23-5 (derate 7.1mW/C above +70C)...................571mW Operating Temperature Range ...........................-40C to +85C Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10sec) .............................+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.
ELECTRICAL CHARACTERISTICS
(VCC = +3.0V to +5.5V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5.0V, TA = +25C.) (Note 1) PARAMETER DC CHARACTERISTICS Supply Voltage Supply Current LOGIC INPUT (EN) Logic Threshold Low Logic Threshold High Leakage Current LOGIC OUTPUT INVALID Output Voltage Low INVALID Output Voltage High RECEIVER INPUT Input Voltage Range Input Threshold Low Input Threshold High Input Hysteresis RIN Threshold to INVALID Output High RIN Threshold to INVALID Output Low Input Resistance RECEIVER OUTPUT Output Leakage Current Output Voltage Low Output Voltage High IROUT VOL VOH Receiver disabled ISINK = 1.6mA ISOURCE = 1.0mA VCC 0.6 VCC 0.1 0.05 10 0.4 A V V VRIN VITL VITH VHYST VITOH VITOL RRIN Positive threshold Negative threshold -2.7 -0.3 3 5 0.3 7 VCC = 3.3V VCC = 5.0V VCC = 3.3V VCC = 5.0V -25 0.6 0.8 1.2 1.5 1.5 1.8 300 2.7 2.4 2.7 25 V V V mV V V k VIOL VIOH ISINK = 1.6mA ISOURCE = 1.0mA VCC 0.6 0.4 V V VIL VIH IEN VCC = 3.3V VCC = 5.0V 2.0 2.4 0.01 1.0 0.8 V V A VCC ICC VCC = 3.3V or 5V, RIN = VCC or GND, no load 3.0 0.5 5.5 5.0 V A SYMBOL CONDITIONS MIN TYP MAX UNITS
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15kV ESD-Protected, 0.5A, +3V to +5.5V, 1.5Mbps RS-232 Receivers in SOT23-5
ELECTRICAL CHARACTERISTICS (continued)
(VCC = +3.0V to +5.5V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5.0V, TA = +25C.) (Note 1) PARAMETER TIMING CHARACTERISTICS Maximum Data Rate Receiver Propagation Delay, High-to-Low Receiver Propagation Delay, Low-to-High Receiver Skew Receiver Output Enable Time Receiver Output Disable Time Receiver Positive or Negative Threshold to INVALID High Receiver Positive or Negative Threshold to INVALID Low tPHL tPLH tRS tROE tROD tINVH tINVL CL = 50pF RIN to ROUT; CL = 150pF RIN to ROUT; CL = 150pF 1.5 0.15 0.15 50 200 200 250 30 Mbps s s ns ns ns ns s SYMBOL CONDITIONS MIN TYP MAX UNITS
MAX3180E-MAX3183E
| tPHL - tPLH |, Figure 1
Note 1: Specifications are 100% tested at TA = +25C. Limits over temperature are guaranteed by design.
Typical Operating Characteristics
(VCC = +5V, TA = +25C, unless otherwise noted.)
SUPPLY CURRENT vs. DATA RATE
RL = 50k CL = 100pF
MAX3180E-01
RIN TO INVALID HIGH vs. SUPPLY VOLTAGE
MAX3180E-02
0.7 0.6 SUPPLY CURRENT (mA) 0.5 0.4 0.3 VCC = 3.3V 0.2 0.1 0 0 0.5 1.0
350 330 310 tINVH (ns)
VCC = 5V
290 270 250 230
1.5
3.0
3.5
4.0
4.5
5.0
5.5
DATA RATE (Mbps)
VCC (V)
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15kV ESD-Protected, 0.5A, +3V to +5.5V, 1.5Mbps RS-232 Receivers in SOT23-5 MAX3180E-MAX3183E
Typical Operating Characteristics (continued)
(VCC = +5V, TA = +25C, unless otherwise noted.)
MAX3180E ENABLE ASSERTION TO ROUT RESPONSE
MAX3180E-03
RIN TO INVALID LOW vs. VCC
60 55 50 tINVL (s) 45 40 35 30 25 3.0 3.5 4.0 4.5 5.0 5.5 ENABLE 0 10V RIN 0
-10V 5V ROUT 0 5V VCC = 5.0V RL = 50k CL = 100pF 500ns/div
VCC (V)
Pin Description
NAME PIN MAX3180E EN 1 - 2 3 - 4 5 RIN VCC - RIN VCC ROUT RIN VCC ROUT RIN VCC Noninverting Receiver Output Receiver Input Supply Voltage GND ROUT MAX3181E - INVALID GND ROUT MAX3182E EN - GND - MAX3183E - INVALID GND - Receiver Output Enable Output of the Valid Input Detector Ground Inverting Receiver Output FUNCTION
Detailed Description
5V RIN 50% 0 t PLH VOH ROUT VOL 50% 50% t PHL 50%
Figure 1. Receiver Propagation-Delay Timing
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The MAX3180E-MAX3183E are EIA/TIA-232 and V.28/ V.24 communications receivers that convert RS-232 signals to CMOS logic levels. They operate on a +3V to +5.5V supply, have 1.5Mbps data rate capability, and feature enhanced electrostatic discharge (ESD) protection (see ESD Protection). All of these devices achieve a typical supply current of 0.5A. The MAX3180E/ MAX3182E have a receiver enable control (EN). The MAX3181E/MAX3183E contain a signal invalid output (INVALID). The MAX3180E/MAX3181E invert the ROUT signal relative to RIN (standard RS-232). The MAX3182E/MAX3183E outputs are not inverted. The devices come in tiny SOT23-5 packages.
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MAX3180E-04
15kV ESD-Protected, 0.5A, +3V to +5.5V, 1.5Mbps RS-232 Receivers in SOT23-5 MAX3180E-MAX3183E
VALID SIGNALS RECEIVER INPUT LEVELS +2.7V INDETERMINATE +0.3V 0 -0.3V INDETERMINATE -2.7V VALID SIGNALS RECEIVER INPUT VOLTAGE (V) INVALID REGION
INVALID SIGNALS VCC INVALID OUTPUT (V) 0
tINVL
tINVH
Figure 2. Input Levels and INVALID Timing
Signal Invalid Detector
If no valid signal levels appear on RIN for 30s (typ), INVALID goes low. This event typically occurs if the RS-232 cable is disconnected, or if the connected peripheral transmitter is turned off. INVALID goes high when a valid level is applied to the RS-232 receiver input. Figure 2 shows the input levels and timing diagram for INVALID operation.
RC 1M CHARGE-CURRENT LIMIT RESISTOR HIGHVOLTAGE DC SOURCE RD 1500 DISCHARGE RESISTANCE DEVICE UNDER TEST
Enable Input
The MAX3180E/MAX3182E feature an enable input (EN). Drive EN high to force ROUT into a high-impedance state. In this state, the devices ignore incoming RS-232 signals. Pull EN low for normal operation.
Cs 100pF
STORAGE CAPACITOR
ESD Protection
As with all Maxim devices, ESD protection structures are incorporated on all pins to protect against ESD encountered during handling and assembly. The receiver inputs of the MAX3180E-MAX3183E have extra protection against static electricity. Maxim's engineers have developed state-of-the-art structures enabling these pins to withstand ESD up to 15kV without damage or latchup. The receiver inputs of the MAX3180E- MAX3183E are characterized for protection to the following limits: * 15kV using the Human Body Model * 8kV using the Contact Discharge method specified in IEC 1000-4-2 * 15kV using the Air-Gap Discharge method specified in IEC 1000-4-2
Figure 3. Human Body ESD Test Model
IP 100% 90% AMPERES 36.8% 10% 0 0 tRI TIME
Ir
PEAK-TO-PEAK RINGING (NOT DRAWN TO SCALE)
tDL CURRENT WAVEFORM
Figure 4. Human Body Model Current Waveform
Human Body Model Figure 3 shows the Human Body Model, and Figure 4 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, and then discharged into the test device through a 1.5k resistor.
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15kV ESD-Protected, 0.5A, +3V to +5.5V, 1.5Mbps RS-232 Receivers in SOT23-5 MAX3180E-MAX3183E
IEC 1000-4-2 The IEC 1000-4-2 standard covers ESD testing and performance of finished equipment; it does not specifically refer to ICs. The MAX3180E-MAX3183E enable the design of equipment that meets the highest level (Level 4) of IEC 1000-4-2 without the need for additional ESDprotection components.
The major difference between tests done using the Human Body Model and IEC 1000-4-2 is higher peak current in IEC 1000-4-2. Because series resistance is lower in the IEC 1000-4-2 model, the ESD withstand voltage measured to this standard is generally lower than that measured using the Human Body. Figure 5 shows the IEC 1000-4-2 model, and Figure 6 shows the current waveform for the 8kV IEC 1000-4-2 Level 4 ESD Contact Discharge test. The Air-Gap test involves approaching the device with a charged probe. The Contact Discharge method connects the probe to the device before the probe is energized.
Power-Supply Decoupling
In most circumstances, a 0.1F VCC bypass capacitor is adequate. Connect the bypass capacitor as close to the IC as possible.
RC 50M TO 100M CHARGE-CURRENT LIMIT RESISTOR HIGHVOLTAGE DC SOURCE
RD 330 DISCHARGE RESISTANCE DEVICE UNDER TEST
I 100% 90% IPEAK
Cs 150pF
STORAGE CAPACITOR
10% tR= 0.7ns TO 1ns 30ns 60ns t
Figure 5. IEC 1000-4-2 ESD Test Model
Figure 6. IEC 1000-4-2 ESD Generator Current Waveform
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15kV ESD-Protected, 0.5A, +3V to +5.5V, 1.5Mbps RS-232 Receivers in SOT23-5
Pin Configurations/Functional Diagrams
MAX3180E-MAX3183E
TOP VIEW
EN (INVALID) 1
MAX3180E MAX3181E
5k
5
VCC
EN (INVALID)
1
MAX3182E MAX3183E
5k
5
VCC
GND 2
GND 2
ROUT 3
4
RIN
ROUT 3
4
RIN
SOT23-5
( ) ARE FOR MAX3181E/MAX3183E ONLY.
SOT23-5
___________________Chip Information
TRANSISTOR COUNT: 41
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15kV ESD-Protected, 0.5A, +3V to +5.5V, 1.5Mbps RS-232 Receivers in SOT23-5 MAX3180E-MAX3183E
Package Information
SOT5L.EPS
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.
8 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 (c) 1999 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

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