SN54LVC74A, SN74LVC74A
DUAL POSITIVE-EDGE-TRIGGERED D-TYPE FLIP-FLOPS
WITH CLEAR AND PRESET
SCAS287H – JANUARY 1993 – REVISED JUNE 1998
SN54LVC74A . . . J OR W PACKAGE
SN74LVC74A . . . D, DB, OR PW PACKAGE
(TOP VIEW)
EPIC (Enhanced-Performance Implanted
CMOS) Submicron Process
ESD Protection Exceeds 2000 V Per
MIL-STD-883, Method 3015; Exceeds 200 V
Using Machine Model (C = 200 pF, R = 0)
1CLR
1D
V
CC
2CLR
2D
1
2
3
4
5
6
7
14
13
12
11
Latch-Up Performance Exceeds 250 mA Per
JESD 17
1CLK
1PRE
1Q
2CLK
10 2PRE
Typical V
< 0.8 V at V
(Output Ground Bounce)
OLP
= 3.3 V, T = 25°C
9
8
1Q
2Q
2Q
CC
A
GND
Typical V
> 2 V at V
(Output V
Undershoot)
OHV
CC
OH
= 3.3 V, T = 25°C
A
Inputs Accept Voltages to 5.5 V
SN54LVC74A . . . FK PACKAGE
(TOP VIEW)
Package Options Include Plastic
Small-Outline (D), Shrink Small-Outline
(DB), and Thin Shrink Small-Outline (PW)
Packages, and Ceramic Flat (W) Packages,
Ceramic Chip Carriers (FK), and DIPs (J)
3
2
1
20 19
18
1CLK
NC
2D
4
5
6
7
8
17
16
15
14
NC
description
1PRE
NC
2CLK
NC
The SN54LVC74A dual positive-edge-triggered
D-type flip-flop is designed for 2.7-V to 3.6-V V
1Q
2PRE
CC
9 10 11 12 13
operation and the SN74LVC74A dual positive-
edge-triggered D-type flip-flop is designed for
1.65-V to 3.6-V V
operation.
CC
NC – No internal connection
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.
Inputs can be driven from either 3.3-V or 5-V devices. This feature allows the use of these devices as translators
in a mixed 3.3-V/5-V system environment.
The SN54LVC74A is characterized for operation over the full military temperature range of –55°C to 125°C. The
SN74LVC74A is characterized for operation from –40°C to 85°C.
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 1998, Texas Instruments Incorporated
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.
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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