DM74ALS373 Datasheet, PDF (1/6 Pages) Fairchild Semiconductor – Octal D-Type 3-STATE Transparent Latch

March 1996
DM74ALS373
Octal D-Type TRI-STATE Transparent Latch
General Description
These 8-bit registers feature totem-pole TRI-STATE outputs
designed specifically for driving highly-capacitive or relative-
ly low-impedance loads The high-impedance state and in-
creased high-logic-level drive provide these registers with
the capability of being connected directly to and driving the
bus lines in a bus-organized system without need for inter-
face or pull-up components They are particularly attractive
for implementing buffer registers I O ports bidirectional
bus drivers and working registers
The eight latches of the ALS373 are transparent D-type
latches While the enable (G) is high the Q outputs will fol-
low the data (D) inputs When the enable is taken low the
output will be latched at the level of the data that was set
up
A buffered output control input can be used to place the
eight outputs in either a normal logic state (high or low logic
levels) or a high-impedance state In the high-impedance
state the outputs neither load nor drive the bus lines signifi-
cantly
The output control does not affect the internal operation of
the latches That is the old data can be retained or new
data can be entered even while the outputs are off
Features
Y _{Switching specifications at 50 pF}
Y _{Switching specifications guaranteed over full tempera-}
ture and V_CC range
Y _{Advanced oxide-isolated ion-implanted Schottky TTL}
process
Y _{Functionally and pin for pin compatible with LS TTL}
counterpart
Y _{Improved AC performance over LS373 at approximately}
half the power
Y _{TRI-STATE buffer-type outputs drive bus lines directly}
Connection Diagram
Dual-In-Line Package
Order Number DM74ALS373WM DM74ALS373N or DM74ALS373SJ
See NS Package Number M20B M20D or N20A
TL F 6220 – 1
TRI-STATE is a registered trademark of National Semiconductor Corporation
C1996 National Semiconductor Corporation TL F 6220
RRD-B30M36 Printed in U S A
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