54AC11533 Datasheet, PDF (1/8 Pages) Texas Instruments – OCTAL D-TYPE TRANSPARENY LATCHES WITH 3-STATE OUTPUTS

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• 8-Latches in a Single Package
• 3-State Bus-Driving Inverting Outputs
• Full Parallel Access for Loading
• Buffered Control Inputs
• 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
54AC11533, 74AC11533
OCTAL DĆTYPE TRANSPARENT LATCHES
WITH 3ĆSTATE OUTPUTS
SCAS004 − D2957, JULY 1987 − REVISED APRIL 1993
54AC11533 . . . JT PACKAGE
74AC11533 . . . 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
description
These 8-bit 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 ′AC11533 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 ′AC11533 is
functionally equivalent to the ′AC11373 except for
having inverted outputs.
54AC11533 . . . FK PACKAGE
(TOP VIEW)
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
A buffered output-control (OC) input can be used
to place the eight outputs in either a normal logic
NC − No internal connection
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 pull-up
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.
The 54AC11533 is characterized for operation over the full military temperature range of −55°C to 125°C. The
74AC11533 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.
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Copyright  1993, Texas Instruments Incorporated
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