DM74LS573 Datasheet, PDF (1/5 Pages) Fairchild Semiconductor – Octal D-Type Latch with 3-STATE Outputs

October 1988
Revised March 2000
DM74LS573
Octal D-Type Latch with 3-STATE Outputs
General Description
The DM74LS573 is a high speed octal latch with buffered
common Latch Enable (LE) and buffered common Output
Enable (OE) inputs.
This device is functionally identical to the DM74LS373, but
has different pinouts.
Features
s Inputs and outputs on opposite sides of package allow-
ing easy interface with microprocessors
s Useful as input or output port for microprocessors
s Functionally identical to DM74LS373
s Input clamp diodes limit high speed termination effects
s Fully TTL and CMOS compatible
Ordering Code:
Order Number Package Number
Package Description
DM74LS573WM
M20B
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
DM74LS573N
N20A
20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Logic Symbol
Connection Diagram
V_CC = Pin 20
GND = Pin 10
Pin Descriptions
Function Tables
Pin Names
D0–D7
Data Inputs
Description
Output
Latch
Output
D
Enable
Enable
O
LE
Latch Enable Input (Active HIGH)
L
H
H
H
OE
3-STATE Output Enable Input (Active LOW)
L
H
L
L
O0–O7 3-STATE Latch Outputs
L
L
X
Q_O
H
X
X
Z
L = LOW State
H = HIGH State
X = Don't Care
Z = High Impedance State
Q_O = Previous Condition of O
© 2000 Fairchild Semiconductor Corporation DS009814
www.fairchildsemi.com