54AC11534, 74AC11534
OCTAL D-TYPE EDGE-TRIGGERED FLIP-FLOPS
WITH 3-STATE OUTPUTS
SCAS037A – JULY 1987 – REVISED APRIL 1993
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
Copyright 1993, Texas Instruments Incorporated
2–1
• Eight D-Type Flip-Flops in a Single Package
• 3-State Bus Driving Inverting Outputs
• Full Parallel Access for Loading
• Inputs Are TTL-Voltage Compatible
• Flow-Through Architecture to Optimize
PCB Layout
• Center-Pin V
CC
and GND Configurations to
Minimize High-Speed Switching Noise
•
EPIC
(Enhanced-Performance Implanted
CMOS) 1- m 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
These eight flip-flops feature 3-state outputs
designed for implementing buffer registers, I/O
ports, bidirectional bus drivers, and working
registers.
The eight flip-flops of the ′AC11534 are edge-
triggered, D-type flip-flops. On the positive
transition of the clock, the Q outputs are set to the
complement of the logic levels at the D inputs. The
′AC11534 is functionally equivalent to the
′AC11374 except for having inverted outputs.
An output-control input (OC) is 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 pull-up components. The output control (OC
)
does not affect the internal operation of the
flip-flops. Old data can be retained or new data
can be entered while the outputs are in the
high-impedance state.
The 54AC11534 is characterized for operation
over the full military temperature range of –55°C
to 125°C. The 74AC11534 is characterized for
operation from – 40°C to 85°C.
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
1Q
2Q
3Q
4Q
GND
GND
GND
GND
5Q
6Q
7Q
8Q
OC
1D
2D
3D
4D
V
CC
V
CC
5D
6D
7D
8D
CLK
54AC11534 . . . JT PACKAGE
74AC11534 . . . DW OR NT PACKAGE
(TOP VIEW)
321
13 14
5
6
7
8
9
10
11
7D
8D
CLK
NC
8Q
7Q
6Q
2D
1D
OC
NC
1Q
2Q
3Q
4
15 16 17 18
GND
GND
NC
GND
GND
5Q
3D
4D
NC
54AC11534 . . . FK PACKAGE
(TOP VIEW)
28 27 26
25
24
23
22
21
20
19
12
4Q
5D
6D
CC
V
CC
V
INPUTS
OUTPUT
Q
L
L
L
H
FUNCTION TABLE
(each filp-flop)
OC CLK D
↑
↑
L
X
H
L
X
X
L
H
Q
0
Z
NC – No internal connection
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.
EPIC is a trademark of Texas Instruments Incorporated.
