Motorola MC74LCX16245DT, MC74LCX16245DTR2 Datasheet
SEMICONDUCTOR TECHNICAL DATA
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The MC74LCX16245 is a high performance, non–inverting 16–bit
transceiver operating from a 2.7 to 3.6V supply. The device is byte
controlled. Each byte has separate Output Enable inputs which can be
tied together for full 16–bit operation. High impedance TTL compatible
inputs significantly reduce current loading to input drivers while TTL
compatible outputs offer improved switching noise performance. A V
specification of 5.5V allows MC74LCX16245 inputs to be safely driven
from 5V devices. The MC74LCX16245 is suitable for memory address
driving and all TTL level bus oriented transceiver applications.
4.5ns maximum propagation delays support high performance
applications. Current drive capability is 24mA at both A and B ports. The
Transmit/Receive (T/R
through the bi–directional transceiver. Transmit (active–HIGH) enables
data from A ports to B ports; Receive (active–LOW) enables data from B
to A ports. The Output Enable inputs (OEn
and B ports by placing them in a HIGH Z condition.
n) inputs determine the direction of data flow
), when HIGH, disable both A
LOW–VOLTAGE
I
CMOS 16–BIT TRANSCEIVER
• Designed for 2.7 to 3.6V V
• 4.5ns Maximum t
pd
Operation
CC
• 5V Tolerant — Interface Capability With 5V TTL Logic
• Supports Live Insertion and Withdrawal
• I
Specification Guarantees High Impedance When VCC = 0V
OFF
• LVTTL Compatible
• LVCMOS Compatible
• 24mA Balanced Output Sink and Source Capability
• Near Zero Static Supply Current in All Three Logic States (20µA)
Substantially Reduces System Power Requirements
• Latchup Performance Exceeds 500mA
• ESD Performance: Human Body Model >2000V;
Machine Model >200V
PLASTIC TSSOP PACKAGE
PIN NAMES
Pins
OEn
T/Rn
A0–A15
B0–B15
DT SUFFIX
CASE 1201–01
Function
Output Enable Inputs
Transmit/Receive Inputs
Side A Inputs or 3–State Outputs
Side B Inputs or 3–State Outputs
9/96
Motorola, Inc. 1996
1
REV 1
MC74LCX16245
Output
Output
T/R1
V
CC
B9
V
CC
T/R2
OE1
481
A0B0
472
A1B1
463
GNDGND
454
A2B2
445
A3B3
436
V
427
CC
A4B4
418
A5B5
409
GNDGND
3910
A6B6
3811
A7B7
3712
A8B8
3613
A9
3514
GNDGND
3415
A10B10
3316
A11B11
3217
V
3118
CC
A12B12
3019
A13B13
2920
GNDGND
2821
A14B14
2722
A15B15
2623
OE2
2524
T/R1
1
48
OE1
A0:7 B0:7
LOGIC DIAGRAM
T/R2
A8:15 B8:15
24
OE2
25
One of Eight
Inputs
OE1 T/R1
L L Bus B0:7 Data to Bus A0:7 L L Bus B8:15 Data to Bus A8:15
L H Bus A0:7 Data to Bus B0:7 L H Bus A8:15 Data to Bus B8:15
H X High Z State on A0:7, B0:7 H X High Z State on A8:15, B8:15
H = High V oltage Level; L = Low V oltage Level; Z = High Impedance State; X = High or Low Voltage Level and T ransitions Are Acceptable, for I
reasons, DO NOT FLOAT Inputs
MOTOROLA LCX DATA
s
2
Inputs
OE2 T/R2
s
BR1339 — REV 2
CC
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