74AC11074
DUAL POSITIVE-EDGE-TRIGGERED D-TYPE FLIP-FLOP
WITH CLEAR AND PRESET
SCAS499A – DECEMBER 1986 – REVISED APRIL 1996
D, N, OR PW PACKAGE
Center-Pin V
Minimize High-Speed Switching Noise
and GND Configurations
CC
(TOP VIEW)
EPIC (Enhanced-Performance Implanted
CMOS) 1-µm Process
1PRE
1Q
1Q
GND
2Q
1CLK
1D
1CLR
1
2
3
4
5
6
7
14
13
12
11
10
9
500-mA Typical Latch-Up Immunity at
125°C
V
CC
Package Options Include Plastic
Small-Outline (D) and Thin Shrink
Small-Outline (PW) Packages, and
Standard Plastic 300-mil DIPs (N)
2CLR
2D
2CLK
2Q
2PRE
8
description
This device contains two independent positive-edge-triggered D-type flip-flops. A low level at the preset (PRE)
or clear (CLR) input sets or resets the outputs regardless of the levels of the other inputs. When PRE and CLR
are inactive (high), data at the data (D) input that meets the setup-time requirements are transferred to the
outputs on the low-to-high transition of the clock (CLK) pulse. Clock triggering occurs at a voltage level and is
not directly related to the rise time of the clock pulse. Following the hold-time interval, data at the D input may
be changed without affecting the levels at the outputs.
The 74AC11074 is characterized for operation from –40°C to 85°C.
FUNCTION TABLE
INPUTS
OUTPUT
PRE
L
CLR
CLK
X
D
X
X
X
H
L
Q
H
L
Q
H
L
L
H
X
H
†
†
H
L
L
X
H
H
H
H
H
H
L
L
H
H
H
L
X
Q
Q
0
0
†
This configuration is nonstable; that is, it does not
persist when PRE or CLR returns to its inactive
(high) level.
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
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