SN54LVC374A, SN74LVC374A
OCTAL EDGE-TRIGGERED D-TYPE FLIP-FLOPS
WITH 3-STATE OUTPUTS
SCAS296I – JANUARY 1993 – REVISED JUNE 1998
SN54LVC374A . . . J OR W PACKAGE
SN74LVC374A . . . DB, DW, OR PW PACKAGE
(TOP VIEW)
EPIC (Enhanced-Performance Implanted
CMOS) Submicron Process
Typical V
< 0.8 V at V
(Output Ground Bounce)
OLP
= 3.3 V, T = 25°C
OE
1Q
1D
2D
2Q
3Q
3D
4D
4Q
V
CC
8Q
8D
CC
A
1
2
3
4
5
6
7
8
9
20
19
18
Typical V
> 2 V at V
(Output V
Undershoot)
OHV
CC
OH
= 3.3 V, T = 25°C
A
17 7D
16 7Q
15 6Q
14 6D
13 5D
12 5Q
11 CLK
Power Off Disables Inputs/Outputs,
Permitting Live Insertion
Support Mixed-Mode Signal Operation on
All Ports (5-V Input/Output Voltage With
3.3-V V
)
CC
ESD Protection Exceeds 2000 V Per
MIL-STD-883, Method 3015; Exceeds 200 V
Using Machine Model (C = 200 pF, R = 0)
GND 10
SN54LVC374A . . . FK PACKAGE
(TOP VIEW)
Latch-Up Performance Exceeds 250 mA Per
JESD 17
Package Options Include Plastic
Small-Outline (DW), Shrink Small-Outline
(DB), and Thin Shrink Small-Outline (PW)
Packages, Ceramic Chip Carriers (FK),
Ceramic Flat (W) Package, and DIPs (J)
3
2
1
20 19
18
2D
2Q
3Q
3D
4D
8D
7D
7Q
6Q
4
5
6
7
8
17
16
15
description
14 6D
9 10 11 12 13
The SN54LVC374A octal edge-triggered D-type
flip-flop is designed for 2.7-V to 3.6-V V
CC
operation and the SN74LVC374A octal
edge-triggered D-type flip-flop is designed for
1.65-V to 3.6-V V
operation.
CC
These devices feature 3-state outputs designed specifically for driving highly capacitive or relatively
low-impedance loads. These devices are particularly suitable for implementing buffer registers, input/output
(I/O) ports, bidirectional bus drivers, and working registers.
On the positive transition of the clock (CLK) input, the Q outputs are set to the logic levels set up at the data
(D) inputs.
A buffered output-enable (OE) input can be used to place the eight outputs in either a normal logic state (high
or low logic levels) or a high-impedance state. In the high-impedance state, the outputs neither load nor drive
thebuslinessignificantly. Thehigh-impedancestateandincreaseddriveprovidethecapabilitytodrivebuslines
without interface or pullup components.
OE does not affect internal operations of the latch. Old data can be retained or new data can be entered while
the outputs are in the high-impedance state.
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.
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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