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MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Low-Voltage CMOS 18-Bit Universal Bus Transceiver
With 5V-Tolerant Inputs and Outputs (3-State, Non-Inverting)
MC74LCX16500
The MC74LCX16500 is a high performance, non-inverting 18-bit universal bus transceiver operating from a 2.7 to 3.6V supply. This part is not byte controlled; it is "18-bit" controlled. High impedance TTL compatible inputs significantly reduce current loading to input drivers while TTL compatible outputs offer improved switching noise performance. A VI specification of 5.5V allows MC74LCX16500 inputs to be safely driven from 5V devices. The MC74LCX16500 is suitable for memory address driving and all TTL level bus oriented transceiver applications. Data flow in each direction is controlled by Output Enable (OEAB, OEBA), Latch Enable (LEAB, LEBA) and Clock inputs (CAB, CBA). When LEAB is HIGH, the A-to-B dataflow is transparent. When LEAB is LOW, and CAB is held at LOW or HIGH, the data A is latched; on the HIGH-to-LOW transition of CAB the A-data is stored in the latch/flip-flop. The outputs are active when OEAB is HIGH. When OEAB is LOW the B-outputs are in 3-state. Similarly, the LEBA, OEBA and CBA control the B-to-A dataflow. Please note that the output enables are complementary; OEAB is active HIGH, OEBA is active LOW.
LOW-VOLTAGE CMOS 18-BIT UNIVERSAL BUS TRANSCEIVER
* * * * * * * * *
Designed for 2.7 to 3.6V VCC Operation 6ns Maximum tpd 5V Tolerant -- Interface Capability With 5V TTL Logic Supports Live Insertion and Withdrawal IOFF Specification Guarantees High Impedance When VCC = 0V LVTTL Compatible LVCMOS Compatible 24mA Balanced Output Sink and Source Capability Near Zero Static Supply Current in All Three Logic States (20A) Substantially Reduces System Power Requirements
DT SUFFIX 56-LEAD PLASTIC TSSOP PACKAGE CASE 1202-01
PIN NAMES
Pins OEAB, OEBA CAB, CBA LEAB, LEBA A0-A17 B0-B17 Function Output Enable Inputs Clock Pulse Inputs Latch Enable Inputs Side A Inputs/Outputs Side B Inputs/Outputs
* Latchup Performance Exceeds 500mA * ESD Performance: Human Body Model >2000V; Machine
Model >200V
3/97
(c) Motorola, Inc. 1997
1
REV 1
MC74LCX16500
OEAB 1 LEAB 2 A0 3 GND 4 A1 5 A2 6 VCC 7 A3 8 A4 9 A5 10 GND 11 A6 12 A7 13 A8 14 A9 15 A10 16 A11 17 GND 18 A12 19 A13 20 A14 21 VCC 22 A15 23 A16 24 GND 25 A17 26 OEBA 27 LEBA 28
56 GND 55 CAB 54 B0 53 GND 52 B1 51 B2 50 VCC 49 B3 48 B4 47 B5 46 GND 45 B6 44 B7 43 B8 42 B9 41 B10 40 B11 39 GND 38 B12 37 B13 36 B14 35 VCC 34 B15 33 B16 32 GND 31 B17 30 CBA 29 GND To 17 Other Channels 1D 1D C1 C1 A0
3
OEAB CBA LEBA OEBA CAB LEAB
1 30 28 27 55 2
C1 1D
C1 1D
54
B0
Figure 1. 56-Lead Pinout (Top View)
Figure 2. Logic Diagram
MOTOROLA
2
LCX DATA BR1339 -- REV 3
MC74LCX16500
FUNCTION TABLE
Inputs OEAB L OEBA H H or L L H H H or L L X X X* X* X* L H or L LEAB LEBA CAB CBA Data Ports An Input X l h Input X l h L H Output X* X L X* X* H or L X QB L H L H Output L L H or L H or L QB Bn Input X l h Output QA L H L H Input X l h L H Output QA Stored A Data to B Bus; Stored B Data to A Bus Hold and Display A Data Clock B Data to A Bus; Store B Data B Data to A Bus; (Transparent) Hold and Display B Data Clock A Data to B Bus; Store A Data A Data to B Bus; (Transparent) Hold Data; A and B Outputs Disabled Clock A and/or B Data; A and B Outputs Disabled Operating Mode
H L L
X
X H L
H
H = High Voltage Level; L = Low Voltage Level; h = High Voltage Level One Setup Time Prior to the Latch Enable or Clock High-to-Low Transition; l = Low Voltage Level One Setup Time Prior to the Latch Enable or Clock High-to-Low Transition; X = Don't Care; = High-to-Low Clock Transition; QA = A Input Storage Register; QB = B Input Storage Register; * = The clocks are not internally gated with either the Output Enables or the Source Inputs. Therefore, data at the A or B ports may be clocked into the storage registers, at any time. For ICC reasons, Do Not Float Inputs.
LCX DATA BR1339 -- REV 3
3
MOTOROLA
MC74LCX16500
Real Time Transfer - Bus B to Bus A
Real Time Transfer - Bus A to Bus B
BUS B
OEAB L
OEBA L
CAB X
CBA X
LEAB X
LEBA H
OEAB H
OEBA H
CAB X
CBA X
LEAB H
Store Data from Bus A, Bus B or Bus A and Bus B
Transfer A Stored Data to Bus B or B Stored Data to Bus A or Both at the Same Time
BUS B
OEAB X L L
OEBA H X H
CAB X X
CBA X X
LEAB L X L
LEBA X L L
OEAB H L H
OEBA H L L
CAB X H or L
CBA X H or L
LEAB L X L
Store Bus A in Both Registers or Store Bus B in Both Registers
Isolation
BUS B
OEAB H L
OEBA H L
CAB X X
CBA X X
LEAB L L
LEBA L L
OEAB L
OEBA H
CAB H or L
CBA H or L
LEAB L
BUS B LEBA L LCX DATA BR1339 -- REV 3
BUS A
Figure 3. Bus Applications
MOTOROLA
4
BUS A
BUS B LEBA X L L
BUS A
BUS A
BUS B LEBA X
BUS A
BUS A
MC74LCX16500
ABSOLUTE MAXIMUM RATINGS*
Symbol VCC VI VO Parameter DC Supply Voltage DC Input Voltage DC Output Voltage Value -0.5 to +7.0 -0.5 VI +7.0 -0.5 VO +7.0 -0.5 VO VCC + 0.5 IIK IOK DC Input Diode Current DC Output Diode Current -50 -50 +50 IO ICC IGND TSTG DC Output Source/Sink Current DC Supply Current Per Supply Pin DC Ground Current Per Ground Pin Storage Temperature Range 50 100 100 -65 to +150 Output in 3-State Note 1. VI < GND VO < GND VO > VCC Condition Unit V V V V mA mA mA mA mA mA C
* Absolute maximum continuous ratings are those values beyond which damage to the device may occur. Exposure to these conditions or conditions beyond those indicated may adversely affect device reliability. Functional operation under absolute-maximum-rated conditions is not implied. 1. Output in HIGH or LOW State. IO absolute maximum rating must be observed.
RECOMMENDED OPERATING CONDITIONS
Symbol VCC VI VO IOH IOL IOH IOL TA t/V Supply Voltage Input Voltage Output Voltage (HIGH or LOW State) (3-State) Parameter Operating Data Retention Only Min 2.0 1.5 0 0 0 Typ 3.3 3.3 Max 3.6 3.6 5.5 VCC 5.5 -24 24 -12 12 -40 0 +85 10 Unit V V V mA mA mA mA C ns/V
HIGH Level Output Current, VCC = 3.0V - 3.6V LOW Level Output Current, VCC = 3.0V - 3.6V HIGH Level Output Current, VCC = 2.7V - 3.0V LOW Level Output Current, VCC = 2.7V - 3.0V Operating Free-Air Temperature Input Transition Rise or Fall Rate, VIN from 0.8V to 2.0V, VCC = 3.0V
DC ELECTRICAL CHARACTERISTICS
TA = -40C to +85C Symbol VIH VIL VOH Characteristic HIGH Level Input Voltage (Note 2.) LOW Level Input Voltage (Note 2.) HIGH Level Output Voltage Condition 2.7V VCC 3.6V 2.7V VCC 3.6V 2.7V VCC 3.6V; IOH = -100A VCC = 2.7V; IOH = -12mA VCC = 3.0V; IOH = -18mA VCC = 3.0V; IOH = -24mA VOL LOW Level Output Voltage 2.7V VCC 3.6V; IOL = 100A VCC = 2.7V; IOL= 12mA VCC = 3.0V; IOL = 16mA VCC = 3.0V; IOL = 24mA 2. These values of VI are used to test DC electrical characteristics only. VCC - 0.2 2.2 2.4 2.2 0.2 0.4 0.4 0.55 V Min 2.0 0.8 Max Unit V V V
LCX DATA BR1339 -- REV 3
5
MOTOROLA
MC74LCX16500
DC ELECTRICAL CHARACTERISTICS (continued)
TA = -40C to +85C Symbol II IOZ IOFF ICC ICC Characteristic Input Leakage Current 3-State Output Current Power-Off Leakage Current Quiescent Supply Current Condition 2.7V VCC 3.6V; 0V VI 5.5V 2.7 VCC 3.6V; 0V VO 5.5V; VI = VIH or V IL VCC = 0V; VI or VO = 5.5V 2.7 VCC 3.6V; VI = GND or VCC 2.7 VCC 3.6V; 3.6 VI or VO 5.5V Increase in ICC per Input 2.7 VCC 3.6V; VIH = VCC - 0.6V Min Max 5.0 5.0 10 20 20 500 Unit A A A A A A
AC CHARACTERISTICS (Note 3.; tR = tF = 2.5ns; CL = 50pF; RL = 500)
Limits TA = -40C to +85C VCC = 3.0V to 3.6V Symbol fmax tPHL tPLH tPHL tPLH tPHL tPLH tPZH tPZL tPHZ tPLZ ts th tw tOSHL tOSLH Parameter Maximum Clock Frequency Propagation Delay Input to Output Propagation Delay Clock to Output Propagation Delay LExx to Output Output Enable Time to High and Low Level Output Disable Time From High and Low Level Setup Time Hold Time Pulse Width Time Output-to-Output Skew (Note 4.) Waveform 3 1 3 4 2 2 3,4 3,4 3,4 Min 170 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 2.5 1.5 3.0 1.0 1.0 6.0 6.0 6.7 6.7 7.0 7.0 7.2 7.2 7.0 7.0 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 2.5 1.5 3.0 7.0 7.0 8.0 8.0 8.0 8.0 8.2 8.2 8.0 8.0 Max VCC = 2.7V Min Max Unit MHz ns ns ns ns ns ns ns ns ns
3. These AC parameters are preliminary and may be modified prior to release. 4. Skew is defined as the absolute value of the difference between the actual propagation delay for any two separate outputs of the same device. The specification applies to any outputs switching in the same direction, either HIGH-to-LOW (tOSHL) or LOW-to-HIGH (tOSLH); parameter guaranteed by design.
DYNAMIC SWITCHING CHARACTERISTICS
TA = +25C Symbol VOLP Characteristic Dynamic LOW Peak Voltage (Note 5.) Condition VCC = 3.3V, CL = 50pF, VIH = 3.3V, VIL = 0V Min Typ 0.8 Max Unit V
VOLV Dynamic LOW Valley Voltage (Note 5.) VCC = 3.3V, CL = 50pF, VIH = 3.3V, VIL = 0V 0.8 V 5. Number of outputs defined as "n". Measured with "n-1" outputs switching from HIGH-to-LOW or LOW-to-HIGH. The remaining output is measured in the LOW state.
MOTOROLA
6
LCX DATA BR1339 -- REV 3
MC74LCX16500
CAPACITIVE CHARACTERISTICS
Symbol CIN CI/O CPD Parameter Input Capacitance Input/Output Capacitance Power Dissipation Capacitance Condition VCC = 3.3V, VI = 0V or VCC VCC = 3.3V, VI = 0V or VCC 10MHz, VCC = 3.3V, VI = 0V or VCC Typical 7 8 20 Unit pF pF pF
2.7V An, Bn 1.5V 0V tPLH, tPHL VOH Bn, An 1.5V VOL WAVEFORM 1 - An to Bn PROPAGATION DELAYS tR = tF = 2.5ns, 10% to 90%; f = 1MHz; tW = 500ns
OEBA 1.5V OEAB tPZH An, Bn 1.5V tPHZ 1.5V
2.7V
0V
VOH - 0.3V 0V tPZL 1.5V VOL + 0.3V WAVEFORM 2 - OEBA/OEAB to An/Bn OUTPUT ENABLE AND DISABLE TIMES tR = tF = 2.5ns, 10% to 90%; f = 1MHz; tW = 500ns tPLZ 3.0V
An, Bn
Figure 4. AC Waveforms
LCX DATA BR1339 -- REV 3
7
MOTOROLA
MC74LCX16500
2.7V An, Bn 1.5V 0V ts CAB, CBA 1.5V th 2.7V tw 1.5V 0V fmax tPLH, tPHL VOH Bn, An 1.5V VOL WAVEFORM 3 - CLOCK to Bn/An PROPAGATION DELAYS, CLOCK MINIMUM PULSE WIDTH, An/Bn to CLOCK SETUP AND HOLD TIMES tR = tF = 2.5ns, 10% to 90%; f = 1MHz; tW = 500ns except when noted
2.7V An, Bn 1.5V 0V ts LEAB, LEBA 1.5V tw tPLH, tPHL VOH Bn, An 1.5V VOL 1.5V 0V th 2.7V
WAVEFORM 4 - LExx to An, Bn PROPAGATION DELAYS, LExx MINIMUM PULSE WIDTH, An, Bn to LExx SETUP AND HOLD TIMES tR = tF = 2.5ns, 10% to 90%; f = 1MHz; tW = 500ns except when noted
NEGATIVE PULSE
tw 1.5V 1.5V
POSITIVE PULSE
1.5V tw WAVEFORM 5 - INPUT PULSE DEFINITION tR = tF = 2.5ns, 10% to 90% of 0V to 2.7V
1.5V
Figure 5. AC Waveforms (continued)
MOTOROLA
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LCX DATA BR1339 -- REV 3
MC74LCX16500
VCC 6V OPEN GND
PULSE GENERATOR RT
DUT CL
R1 RL
TEST tPLH, tPHL tPZL, tPLZ Open Collector/Drain tPLH and tPHL tPZH, tPHZ
SWITCH Open 6V 6V GND
CL = 50pF or equivalent (Includes jig and probe capacitance) RL = R1 = 500 or equivalent RT = ZOUT of pulse generator (typically 50)
Figure 6. Test Circuit
LCX DATA BR1339 -- REV 3
9
MOTOROLA
MC74LCX16500
OUTLINE DIMENSIONS
DT SUFFIX PLASTIC TSSOP PACKAGE CASE 1202-01 ISSUE A
56X
K REF 0.12 (0.005)
M
TU
S
V
S
K K1 J J1
56
29
0.254 (0.010)
L
B -U-
1 28
SECTION N-N
N
NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: MILLIMETER. 3. DIMENSIONS A AND B DO NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. MOLD FLASH OR GATE BURRS SHALL NOT EXCEED 0.15 (0.006) PER SIDE. 4. DIMENSION K DOES NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL BE 0.08 (0.003) TOTAL IN EXCESS OF THE K DIMENSION AT MAXIMUM MATERIAL CONDITION. 5. TERMINAL NUMBERS ARE SHOWN FOR REFERENCE ONLY. 6. DIMENSIONS A AND B ARE TO BE DETERMINED AT DATUM PLANE -W-. DIM A B C D F G H J J1 K K1 L M MILLIMETERS MIN MAX 13.90 14.10 6.00 6.20 --- 1.10 0.05 0.15 0.50 0.75 0.50 BSC 0.12 --- 0.09 0.20 0.09 0.16 0.17 0.27 0.17 0.23 7.95 8.25 0_ 8_ INCHES MIN MAX 0.547 0.555 0.236 0.244 --- 0.043 0.002 0.006 0.020 0.030 0.0197 BSC 0.005 --- 0.004 0.008 0.004 0.006 0.007 0.011 0.007 0.009 0.313 0.325 0_ 8_
PIN 1 IDENT.
A -V- N F DETAIL E M 0.25 (0.010)
D 0.076 (0.003) -T- SEATING
PLANE
C DETAIL E G H
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MOTOROLA 10
EEE CCC EEE CCC
M
TU
S
-W-
MC74LCX16500/D LCX DATA BR1339 -- REV 3

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