74ACT11874 Datasheet, PDF (1/7 Pages) Texas Instruments – DUAL 4-BIT D-TYPE EDGE-TRIGGERED FLIP-FLOPS WITH 3-STATE OUTPUTS

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74ACT11874
DUAL 4ĆBIT DĆTYPE EDGEĆTRIGGERED FLIPĆFLOPS
WITH 3ĆSTATE OUTPUTS
SCAS212 − D3447, MARCH 1990 − REVISED APRIL 1993
• Inputs Are TTL-Voltage Compatible
• 3-State Buffer-Type Outputs Drive Bus
Lines Directly
• Bus-Structured Pinout
• Asynchronous Clear
• 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
description
The 74ACT11874 contains dual 4-bit registers
featuring 3-state outputs designed specifically for
bus driving. This makes this device particularly
suitable for implementing buffer registers, I/O
ports, and working registers.
DW 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 _VCC
20 _2D1
19 _2D2
18 _2D3
17 _2D4
16 _2CLR
15 _2OE
The D-type edge-triggered flip-flops enter data on the low-to-high transition of the clock. The 74ACT11874 has
CLR inputs and noninverting outputs. Taking CLR low causes the four Q outputs to go low independently of the
clock.
The 74ACT11874 is characterized for operation from − 40°C to 85°C.
FUNCTION TABLE
(each 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.
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Copyright  1993, Texas Instruments Incorporated
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