SN54AHCT174, SN74AHCT174
HEX D-TYPE FLIP-FLOPS
WITH CLEAR
SCLS419E – JUNE 1998 – REVISED JANUARY 2000
SN54AHCT174 . . . J OR W PACKAGE
SN74AHCT174 . . . D, DB, DGV, N, OR PW PACKAGE
(TOP VIEW)
EPIC (Enhanced-Performance Implanted
CMOS) Process
Inputs Are TTL-Voltage Compatible
Contain Six Flip-Flops With Single-Rail
Outputs
CLR
1Q
1D
2D
2Q
3D
3Q
GND
V
CC
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
6Q
6D
5D
5Q
4D
4Q
CLK
Applications Include:
– Buffer/Storage Registers
– Shift Registers
– Pattern Generators
Latch-Up Performance Exceeds 250 mA Per
JESD 17
ESD Protection Exceeds JESD 22
– 2000-V Human-Body Model (A114-A)
– 200-V Machine Model (A115-A)
SN54AHCT174 . . . FK PACKAGE
(TOP VIEW)
– 1000-V Charged-Device Model (C101)
Package Options Include Plastic
Small-Outline (D), Shrink Small-Outline
(DB), Thin Very Small-Outline (DGV), Thin
Shrink Small-Outline (PW), and Ceramic
Flat (W) Packages, Ceramic Chip Carriers
(FK), and Standard Plastic (N) and Ceramic
(J) DIPs
3
2
1 20 19
18 6D
1D
2D
NC
2Q
3D
4
5
6
7
8
17
5D
NC
5Q
4D
16
15
14
9 10 11 12 13
description
These monolithic positive-edge-triggered D-type
flip-flops have a direct clear (CLR) input.
NC – No internal connection
Information at the data (D) inputs meeting the setup time requirements is transferred to the outputs on the
positive-going edge of the clock (CLK) pulse. Clock triggering occurs at a particular voltage level and is not
directly related to the transition time of the positive-going edge of CLK. When CLK is at either the high or low
level, the D input has no effect at the output.
The SN54AHCT174 is characterized for operation over the full military temperature range of –55°C to 125°C.
The SN74AHCT174 is characterized for operation from –40°C to 85°C.
FUNCTION TABLE
(each flip-flop)
INPUTS
OUTPUT
Q
CLR
L
CLK
D
X
H
L
X
↑
L
H
L
H
H
↑
H
L
X
Q
0
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 2000, Texas Instruments Incorporated
UNLESS OTHERWISE NOTED this document contains PRODUCTION
DATA information 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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