SN74AHCT74Q-Q1 Datasheet, PDF (1/10 Pages) Texas Instruments – DUAL POSITIVE-EDGE-TRIGGERED D-TYPE FLIP-FLOP WITH CLEAR AND PRESET

SN74AHCT74QĆQ1
DUAL POSITIVEĆEDGEĆTRIGGERED DĆTYPE FLIPĆFLOP
WITH CLEAR AND PRESET
SGDS008B − MAY 1998 − REVISED APRIL 2008
D Qualified for Automotive Applications
D Inputs Are TTL-Voltage Compatible
D EPIC (Enhanced-Performance Implanted
CMOS) Process
D Latch-Up Performance Exceeds 250 mA Per
JESD 17
D ESD Protection Exceeds 2000 V Per
MIL-STD-883, Method 3015; Exceeds 200 V
Using Machine Model (C = 200 pF, R = 0)
D OR PW PACKAGE
(TOP VIEW)
1CLR ₁
1D 2
1CLK 3
1PRE 4
1Q 5
1Q 6
GND 7
14 ^V_CC
13 2CLR
12 2D
11 2CLK
10 2PRE
9 2Q
8 2Q
description
The SN74AHCT74Q is a dual positive-edge-triggered D-type flip-flop.
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 data (D) input meeting the setup time
requirements is transferred to the outputs on the positive-going edge of the clock 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 can be changed without affecting the levels at the outputs.
ORDERING INFORMATION^{
TA
PACKAGE‡
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
−40°C to 125°C
SOIC − D
TSSOP − PW
Tape and reel
Tape and reel
SN74AHCT74QDRQ1
SN74AHCT74QPWRQ1
AHCT74Q
HB74Q
† _{For the most current package and ordering information, see the Package Option Addendum at the end}
of this document, or see the TI web site at http://www.ti.com.
‡ _{Package drawings, thermal data, and symbolization are available at http://www.ti.com/packaging.}
FUNCTION TABLE
INPUTS
OUTPUTS
PRE CLR CLK D
Q
Q
L
H
X
X
H
L
H
L
X
X
L
H
L
L
X
X
H§ H§
H
H
↑
H
H
L
H
H
↑
L
L
H
H
H
L
X
Q0 Q0
§ _{This configuration is unstable; 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.
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  2008, Texas Instruments Incorporated
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