74ACT11873 Datasheet, PDF (1/7 Pages) Texas Instruments – DUAL 4-BIT D-TYPE LATCH WITH 3-STATE OUTPUTS

• Inputs Are TTL-Voltage Compatible
• 3-State Buffer-Type Outputs Drive Bus
Lines Directly
• Bus-Structured Pinout
• Flow-Through Architecture to Optimize
PCB Layout
• Center-Pin V_CC and GND Configurations to
Minimize High-Speed Switching Noise
• EPICt (Enhanced-Performance Implanted
CMOS) 1-mm Process
• 500-mA Typical Latch-Up Immunity at
125°C
• Package Options Include Plastic Small-
Outline Packages and Standard Plastic
300-mil DIPs
description
74ACT11873
DUAL 4ĆBIT DĆTYPE LATCH
WITH 3-STATE OUTPUTS
SCAS096 − FEBRUARY 1990 − REVISED APRIL 1993
DW OR NT PACKAGE
(TOP VIEW)
1C 1
1Q1 2
1Q2 3
1Q3 4
1Q4 5
GND 6
GND 7
GND ⁸
GND ⁹
2Q1 ¹⁰
2Q2 ¹¹
2Q3 ¹²
2Q4 ¹³
2C ¹⁴
28 1OC
27 1CLR
26 1D1
25 1D2
24 1D3
23 1D4
22 V_CC
21 _VCC
20 _2D1
19 _2D2
18 _2D3
17 _2D4
16 _2CLR
15 _2OC
These dual 4-bit registers feature 3-state outputs designed specifically for bus driving. This makes these
devices particularly suitable for implementing buffer registers, I/O ports, bidirectional bus drivers, and working
registers.
The dual 4-bit latch is transparent D-type. When the latch enable input (1C or 2C) is high, the (Q) outputs will
follow the data (D) inputs in true form, according to the function table. When the latch enable input is taken low,
the outputs will be latched. When CLR goes low, the Q outputs go low independently of enable C. The outputs
are in a high-impedance state when OC (output control) is at a high logic level.
The 74ACT11873 is characterized for operation from − 40°C to 85°C.
FUNCTION TABLE
INPUTS
OUTPUT
OC CLR C D
Q
L
L
XX
L
L
H
HH
H
L
H
HL
L
L
H
LX
Qo
H
X
XX
Z
EPIC is a trademark of Texas Instruments Incorporated.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265
Copyright  1993, Texas Instruments Incorporated
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