74ACT11534 Datasheet, PDF (1/7 Pages) Texas Instruments – OCTAL D-TYPE EDGE-TRIGGERED FLIP-FLOPS WITH 3-STATE OUTPUTS

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54ACT11534, 74ACT11534
OCTAL DĆTYPE EDGEĆTRIGGERED FLIPĆFLOPS
WITH 3ĆSTATE OUTPUTS
SCAS038A − D2957, JULY 1987 − REVISED APRIL 1993
• 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
• 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
54ACT11534 . . . JT PACKAGE
74ACT11534 . . . 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 _CLK
54ACT11534 . . . FK PACKAGE
(TOP VIEW)
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 ′ACT11534 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
′ACT11534 is functionally equivalent to the
′ACT11373 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 operations 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 54ACT11534 is characterized for operation
over the full military temperature range of − 55°C
to 125°C. The 74ACT11534 is characterized for
operation from − 40°C to 85°C.
4 3 2 1 28 27 26
2D 5
25 7D
1D ⁶
24 8D
OC ⁷
23 CLK
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 flip-flop)
INPUTS
OUTPUT
OC
CLK
D
Q
L
↑
H
L
L
↑
L
H
L
L
X
Q0
H
X
X
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.
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Copyright  1993, Texas Instruments Incorporated
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