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MC74LCX573 Datasheet, PDF (1/8 Pages) Motorola, Inc – LOW-VOLTAGE CMOS OCTAL TRANSPARENT LATCH | |||
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MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Low-Voltage CMOS Octal
Transparent Latch
Flow Through Pinout
With 5V-Tolerant Inputs and Outputs
(3-State, Non-Inverting)
The MC74LCX573 is a high performance, nonâinverting octal
transparent latch operating from a 2.7 to 3.6V supply. 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 MC74LCX573 inputs to be
safely driven from 5V devices.
The MC74LCX573 contains 8 Dâtype latches with 3âstate standard
outputs. When the Latch Enable (LE) input is HIGH, data on the Dn inputs
enters the latches. In this condition, the latches are transparent, i.e., a
latch output will change state each time its D input changes. When LE is
LOW, the latches store the information that was present on the D inputs a
setup time preceding the HIGHâtoâLOW transition of LE. The 3âstate
standard outputs are controlled by the Output Enable (OE) input. When
OE is LOW, the standard outputs are enabled. When OE is HIGH, the
standard outputs are in the high impedance state, but this does not
interfere with new data entering into the latches. The LCX573 flow
through design facilitates easy PC board layout.
⢠Designed for 2.7 to 3.6V VCC Operation
⢠5V Tolerant â 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 (10µA)
Substantially Reduces System Power Requirements
⢠Latchup Performance Exceeds 500mA
⢠ESD Performance: Human Body Model >2000V; Machine Model >200V
MC74LCX573
LOWâVOLTAGE
CMOS OCTAL
TRANSPARENT LATCH
20
1
20
1
20
1
20
1
DW SUFFIX
PLASTIC SOIC
CASE 751Dâ04
M SUFFIX
PLASTIC SOIC EIAJ
CASE 967â01
SD SUFFIX
PLASTIC SSOP
CASE 940Câ03
DT SUFFIX
PLASTIC TSSOP
CASE 948Eâ02
Pinout: 20âLead (Top View)
VCC O0 O1 O2 O3 O4 O5 O6 O7 LE
20 19 18 17 16 15 14 13 12 11
PIN NAMES
Pins
Function
OE
LE
D0âD7
O0âO7
Output Enable Input
Latch Enable Input
Data Inputs
3âState Latch Outputs
1 2 3 4 5 6 7 8 9 10
OE D0 D1 D2 D3 D4 D5 D6 D7 GND
11/96
© Motorola, Inc. 1996
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