ꢀꢁꢂ ꢃ ꢄꢅ ꢆꢇ ꢃ ꢈ ꢀꢁꢇ ꢃꢄ ꢅꢆ ꢇꢃ
ꢉꢊꢋ ꢌ ꢉꢍꢆ ꢎꢏ ꢐ ꢏꢑ ꢀꢒ ꢆ ꢒꢓꢐ ꢍꢐꢉꢔ ꢐꢍꢆ ꢕꢒ ꢔ ꢔꢐ ꢕꢐꢉ ꢖ ꢌꢒ ꢏ ꢍꢖ ꢌꢑ ꢏꢀ
ꢗ ꢒꢆ ꢄ ꢅꢌ ꢐꢋꢕ ꢋꢁꢉ ꢏ ꢕꢐ ꢀ ꢐꢆ
SCLS169E − DECEMBER 1982 − REVISED APRIL 2004
SN54HCT74 . . . J OR W PACKAGE
SN74HCT74 . . . D, DB, N, NS, OR PW PACKAGE
(TOP VIEW)
D
D
D
D
D
D
D
Operating Voltage Range of 4.5 V to 5.5 V
Outputs Can Drive Up To 10 LSTTL Loads
Low Power Consumption, 40-µA Max I
CC
1
2
3
4
5
6
7
1CLR
1D
V
CC
13 2CLR
14
Typical t = 17 ns
pd
4-mA Output Drive at 5 V
12
11
10
9
1CLK
1PRE
1Q
2D
Low Input Current of 1 µA Max
Inputs Are TTL-Voltage Compatible
2CLK
2PRE
2Q
1Q
description/ordering information
8
GND
2Q
The ’HCT74 devices contain two independent
D-type positive-edge-triggered flip-flops. 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 are transferred to the outputs
on the positive-going edge of the clock (CLK)
pulse. Clock triggering occurs at a voltage level
and is not directly related to the rise time of CLK.
Following the hold-time interval, data at the
D input may be changed without affecting the
levels at the outputs.
SN54HCT74 . . . FK PACKAGE
(TOP VIEW)
3
2
1
20 19
18
2D
1CLK
NC
4
5
6
7
8
NC
17
16
2CLK
1PRE
NC
15 NC
14
9 10 11 12 13
2PRE
1Q
NC − No internal connection
ORDERING INFORMATION
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
†
PACKAGE
T
A
PDIP − N
SOIC − D
Tube of 25
Tube of 50
Reel of 2500
Reel of 250
Reel of 2000
Reel of 2000
Tube of 90
Reel of 2000
Reel of 250
Tube of 25
Tube of 150
Tube of 55
SN74HCT74N
SN74HCT74N
SN74HCT74D
SN74HCT74DR
SN74HCT74DT
SN74HCT74NSR
SN74HCT74DBR
SN74HCT74PW
SN74HCT74PWR
SN74HCT74PWT
SNJ54HCT74J
HCT74
SOP − NS
HCT74
HT74
−40°C to 85°C
SSOP − DB
TSSOP − PW
HT74
CDIP − J
CFP − W
LCCC − FK
SNJ54HCT74J
SNJ54HCT74W
SNJ54HCT74FK
−55°C to 125°C
SNJ54HCT74W
SNJ54HCT74FK
†
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are
available at www.ti.com/sc/package.
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.
Copyright 2004, Texas Instruments Incorporated
ꢊ ꢁ ꢌꢐꢀꢀ ꢑ ꢆꢄ ꢐꢕꢗ ꢒꢀ ꢐ ꢁ ꢑꢆꢐꢉ ꢘꢙ ꢚꢛ ꢜꢝꢞ ꢟꢠꢡ ꢢꢘ ꢞꢝ ꢢꢘꢣ ꢚꢢꢛ ꢏꢕ ꢑ ꢉ ꢊ ꢅꢆ ꢒꢑ ꢁ
ꢘ
ꢉ
ꢋ
ꢆ
ꢋ
ꢚ
ꢢ
ꢤ
ꢝ
ꢥ
ꢠ
ꢣ
ꢘ
ꢚ
ꢝ
ꢢ
ꢞ
ꢟ
ꢥ
ꢥ
ꢡ
ꢢ
ꢘ
ꢣ
ꢛ
ꢝ
ꢤ
ꢦ
ꢟ
ꢧ
ꢨ
ꢚ
ꢞ
ꢣ
ꢘ
ꢚ
ꢝ
ꢢ
ꢜ
ꢣ
ꢡ
ꢩ
ꢏ
ꢥ
ꢝ
ꢜ
ꢟ
ꢞ
ꢘ
ꢛ
ꢞ
ꢝ
ꢢ
ꢤ
ꢝ
ꢥ
ꢠ
ꢘ
ꢝ
ꢛ
ꢦ
ꢡ
ꢞ
ꢚ
ꢤ
ꢚ
ꢞ
ꢣ
ꢘ
ꢚ
ꢝ
ꢢ
ꢛ
ꢦ
ꢡ
ꢥ
ꢘ
ꢙ
ꢡ
ꢘ
ꢡ
ꢥ
ꢠ
ꢛ
ꢝ
ꢤ
ꢆ
ꢡ
ꢪ
ꢣ
ꢛ
ꢒ
ꢢ
ꢛ
ꢘ
ꢥ
ꢟ
ꢠ
ꢡ
ꢢ
ꢘ
ꢛ
ꢛ
ꢘ
ꢣ
ꢢ
ꢜ
ꢣ
ꢥ
ꢜ
ꢫ
ꢣ
ꢥ
ꢥ
ꢣ
ꢢ
ꢘ
ꢬ
ꢩ
ꢏ
ꢥ
ꢝ
ꢜ
ꢟ
ꢞ
ꢘ
ꢚ
ꢝ
ꢢ
ꢦꢣ ꢥ ꢣ ꢠ ꢡ ꢘ ꢡ ꢥ ꢛ ꢩ
ꢦ
ꢥ
ꢝ
ꢞ
ꢡ
ꢛ
ꢛ
ꢚ
ꢢ
ꢭ
ꢜ
ꢝ
ꢡ
ꢛ
ꢢ
ꢝ
ꢘ
ꢢ
ꢡ
ꢞ
ꢡ
ꢛ
ꢛ
ꢣ
ꢥ
ꢚ
ꢨ
ꢬ
ꢚ
ꢢ
ꢞ
ꢨ
ꢟ
ꢜ
ꢡ
ꢘ
ꢡ
ꢛ
ꢘ
ꢚ
ꢢ
ꢭ
ꢝ
ꢤ
ꢣ
ꢨ
ꢨ
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265