74AC11874 Datasheet, PDF (1/7 Pages) Texas Instruments – DUAL 4-BIT D-TYPE EDGE-TRIGGERED FLIP-FLOP WITH 3-STATE OUTPUTS

74AC11874
DUAL 4ĆBIT DĆTYPE EDGEĆTRIGGERED FLIPĆFLOP
WITH 3ĆSTATE OUTPUTS
SCAS236 − MARCH 1990 − REVISED APRIL 1993
• 3-State Buffer-Type Outputs Drive Bus
Lines Directly
• Asynchronous Clear
• Flow-Through Architecture Optimizes PCB
Layout
• Center-Pin V_CC and GND Configurations
Minimize High-Speed Switching Noise
• EPIC  (Enhanced-Performance Implanted
CMOS) 1-µm Process
• 500-mA Typical Latch-Up Immunity at
125°C
• Package Options Include Plastic
Small-Outline Packages and Standard
Plastic 300-mil DIPs
description
DW OR NT PACKAGE
(TOP VIEW)
1CLK 1
1Q1 2
1Q2 3
1Q3 4
1Q4 5
GND 6
GND 7
GND 8
GND 9
2Q1 10
2Q2 11
2Q3 12
2Q4 13
2CLK 14
28 1OE
27 1CLR
26 1D1
25 1D2
24 1D3
23 1D4
22 V_CC
21 V_CC
20 2D1
19 2D2
18 2D3
17 2D4
16 2CLR
15 2OE
This dual 4-bit D-type edge-triggered flip-flop features 3-state outputs designed specifically for bus driving. This
makes these devices particularly suitable for implementing buffer registers, I/O ports, and working registers.
The flip-flops enter data on the low-to-high transition of the clock. The 74AC11874 has clear (1CLR and 2CLR)
inputs and noninverting outputs. Taking CLR low causes the four Q outputs to go low independently of the clock.
The 74AC11874 is characterized for operation from − 40°C to 85°C.
FUNCTION TABLE
(each 4-bit flip-flop)
INPUTS
OUTPUT
OE CLR CLK D
Q
L
L
X
X
L
L
H
↑
H
H
L
H
↑
L
L
L
H
L
X
Q0
H
X
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.
Copyright  1993, Texas Instruments Incorporated
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