Datasheet

CD54ACT112, CD74ACT112
DUAL J-K NEGATIVE-EDGE-TRIGGERED FLIP-FLOPS
WITH CLEAR AND PRESET
SCHS323 – JANUARY 2003
1
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
Inputs Are TTL-Voltage Compatible
Speed of Bipolar F, AS, and S, With
Significantly Reduced Power Consumption
Balanced Propagation Delays
±24-mA Output Drive Current
– Fanout to 15 F Devices
SCR-Latchup-Resistant CMOS Process and
Circuit Design
Exceeds 2-kV ESD Protection Per
MIL-STD-883, Method 3015
description/ordering information
The ’ACT112 devices contain two independent J-K negative-edge-triggered flip-flops. A low level at the preset
(PRE
) or clear (CLR) inputs sets or resets the outputs, regardless of the levels of the other inputs. When PRE
and CLR are inactive (high), data at the J and K inputs meeting the setup-time requirements is transferred to
the outputs on the negative-going edge of the clock pulse (CLK). Clock triggering occurs at a voltage level and
is not directly related to the fall time of the clock pulse. Following the hold-time interval, data at the J and K inputs
may be changed without affecting the levels at the outputs. These versatile flip-flops can perform as toggle
flip-flops by tying J and K high.
ORDERING INFORMATION
T
A
PACKAGE
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
SOIC M
Tube CD74ACT112M
ACT112M
–55°C to 125°C
SOIC
M
Tape and reel CD74ACT112M96
ACT112M
CDIP – F Tube CD54ACT112F3A CD54ACT112F3A
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines
are available at www.ti.com/sc/package.
FUNCTION TABLE
(each flip-flop)
INPUTS
OUTPUTS
PRE CLR CLK J K Q Q
L H X X X H L
H LXXXLH
L LXXXH
H
H H LLQ
0
Q
0
H H HLHL
H H LHLH
H H H H Toggle
H H H X X Q
0
Q
0
Output states are unpredictable if PRE
and CLR go high
simultaneously after both being low at the same time.
CD54ACT112 ...F PACKAGE
CD74ACT112 ...M PACKAGE
(TOP VIEW)
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
1CLK
1K
1J
1PRE
1Q
1Q
2Q
GND
V
CC
1CLR
2CLR
2CLK
2K
2J
2PRE
2Q
Copyright 2003, Texas Instruments Incorporated
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.
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.
On products compliant to MIL-PRF-38535, all parameters are tested
unless otherwise noted. On all other products, production
processing does not necessarily include testing of all parameters.

Summary of content (13 pages)