74ACT11374
OCTAL EDGE-TRIGGERED D-TYPE FLIP-FLOP
WITH 3-STATE OUTPUTS
SCAS217A – JULY 1987 – REVISED APRIL 1996
DB, DW, OR NT PACKAGE
(TOP VIEW)
Eight D-Type Flip-Flops in a Single Package
3-State Bus Driving True Outputs
Full Parallel Access for Loading
1Q
2Q
OE
1D
2D
3D
4D
1
24
23
22
21
20
19
18
17
16
15
14
13
2
Inputs Are TTL-Voltage Compatible
3Q
3
Flow-Through Architecture Optimizes
PCB Layout
4Q
4
GND
GND
GND
GND
5Q
5
Center-Pin V
Minimize High-Speed Switching Noise
and GND Configurations
CC
6
V
V
CC
CC
7
EPIC (Enhanced-Performance Implanted
CMOS) 1- m Process
8
5D
9
6D
500-mA Typical Latch-Up Immunity at
125°C
10
11
12
6Q
7D
7Q
8D
8Q
CLK
Package Options Include Plastic
Small-Outline (DW) and Shrink
Small-Outline (DB) Packages, and Standard
Plastic 300-mil DIPs (NT)
description
This 8-bit flip-flop features 3-state outputs designed specifically for driving highly-capacitive or relatively
low-impedance loads. It is particularly suitable for implementing buffer registers, I/O ports, bidirectional bus
drivers, and working registers.
Theeightflip-flopsofthe74ACT11374areedge-triggeredD-typeflip-flops. Onthepositivetransitionoftheclock
(CLK) input, the Q outputs are set to the logic levels set up at the data (D) inputs.
An output-enable (OE) 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 provides the capability to drive bus lines in a bus-organized
system without need for interface or pullup components.
OE 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 74ACT11374 is characterized for operation from –40°C to 85°C.
FUNCTION TABLE
(each flip-flop)
INPUTS
OUTPUT
Q
OE
L
CLK
D
H
L
↑
↑
H
L
L
L
L
H
↓
X
X
X
X
Q
Q
Q
0
0
0
L
L
H
X
Z
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
EPIC is a trademark of Texas Instruments Incorporated.
Copyright 1996, 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.
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265