74ACT11533 Datasheet, PDF (1/7 Pages) Texas Instruments – OCTAL D-TYPE TRANSPARENT LATCHES WITH 3-STATE OUTPUTS

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• Eight Latches in a Single Package
• 3-State Bus-Driving Inverting Outputs
• Full Parallel Access for Loading
• Buffered Control Inputs
• Inputs Are TTL-Voltage Compatible
• Flow-Through Architecture Optimizes
PCB Layout
• Center-Pin V_CC and GND Configurations
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, Ceramic Chip Carriers,
and Standard Plastic and Ceramic 300-mil
DIPs
description
54ACT11533, 74ACT11533
OCTAL DĆTYPE TRANSPARENT LATCHES
WITH 3ĆSTATE OUTPUTS
SCAS017A − D2957, JULY 1987 − REVISED APRIL 1993
54ACT11533 . . . JT PACKAGE
74ACT11533 . . . DW OR NT PACKAGE
(TOP VIEW)
1Q ₁
2Q 2
3Q 3
4Q 4
GND 5
GND 6
GND 7
GND 8
5Q 9
6Q ¹⁰
7Q ¹¹
8Q ¹²
24 ^OC
23 1D
22 2D
21 3D
20 4D
19 V_CC
18 V_CC
17 5D
16 6D
15 _7D
14 _8D
13 _C
54ACT11533 . . . FK PACKAGE
(TOP VIEW)
These eight latches feature 3-state outputs
designed specifically for driving highly capacitive
or relatively low-impedance loads. They are
particularly suitable for implementing buffer
registers, I/O ports, bidirectional bus drivers, and
working registers.
The eight latches of the ′ACT11533 are
transparent D-type latches. While the enable (C)
is high, the Q outputs will follow the complements
of the (D) inputs. When the output control OC is
taken low, the Q outputs will be latched. The
′ACT11533 is functionally equivalent to the
′ACT11373 except for having inverted outputs.
A buffered output-control (OC) 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
significantly. The high-impedance third state and
increased drive provide the capability to drive the
bus lines in a bus-organized system without need
for interface or pullup components.
The output control (OC) does not affect the
internal operations of the latches. Old data can be
retained or new data can be entered while the
outputs are off.
4 3 2 1 28 27 26
2D 5
25 7D
1D ⁶
24 8D
OC ⁷
23 C
NC ⁸
22 NC
1Q ⁹
21 8Q
2Q ¹⁰
20 7Q
3Q ¹¹
19 6Q
12 13 14 15 16 17 18
NC − No internal connection
FUNCTION TABLE
(each latch)
INPUTS
OUTPUT
OC
C
D
Q
L
H
H
L
L
H
L
H
L
L
X
Q0
H
X
X
Z
The 54ACT11533 is characterized for operation over the full military temperature range of −55°C to 125°C. The
74ACT11533 is characterized for operation from − 40°C to 85°C.
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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