SN54HC74_09 Datasheet, PDF (1/20 Pages) Texas Instruments – DUAL D-TYPE POSITIVE-EDGE-TRIGGERED FLIP-FLOPS WITH CLEAR AND PRESET

SN54HC74, SN74HC74
DUAL D-TYPE POSITIVE-EDGE-TRIGGERED FLIP-FLOPS
WITH CLEAR AND PRESET
SCLS094D – DECEMBER 1982 – REVISED JULY 2003
D Wide Operating Voltage Range of 2 V to 6 V
D Outputs Can Drive Up To 10 LSTTL Loads
D Low Power Consumption, 40-µA Max I_CC
D Typical t_pd = 15 ns
D ±4-mA Output Drive at 5 V
D Low Input Current of 1 µA Max
description/ordering information
The ’HC74 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 can be changed without affecting the
levels at the outputs.
SN54HC74 . . . J OR W PACKAGE
SN74HC74 . . . D, DB, N, NS, 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
SN54HC74 . . . FK PACKAGE
(TOP VIEW)
1CLK
NC
1PRE
NC
1Q
3 2 1 20 19
4
18
5
17
6
16
7
15
8
14
9 10 11 12 13
2D
NC
2CLK
NC
2PRE
NC – No internal connection
ORDERING INFORMATION
TA
PACKAGE†
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
PDIP – N
Tube of 25
SN74HC74N
SN74HC74N
Tube of 50
SN74HC74D
SOIC – D
Reel of 2500 SN74HC74DR
HC74
Reel of 250
SN74HC74DT
–40°C to 85°C
SOP – NS
SSOP – DB
Reel of 2000
Reel of 2000
SN74HC74NSR
SN74HC74DBR
HC74
HC74
Tube of 90
SN74HC74PW
TSSOP – PW
Reel of 2000 SN74HC74PWR
HC74
Reel of 250
SN74HC74PWT
CDIP – J
Tube of 25
SNJ54HC74J
SNJ54HC74J
–55°C to 125°C CFP – W
Tube of 150
SNJ54HC74W
SNJ54HC74W
LCCC – FK
Tube of 55
SNJ54HC74FK
SNJ54HC74FK
† _{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.
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.
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265
Copyright  2003, 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.
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