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SN54AHCT74 Datasheet(PDF) 1 Page - TI store

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Part No. SN54AHCT74
Description  DUAL POSITIVE-EDGE-TRIGGERED D-TYPE FLIP-FLOPS WITH CLEAR AND PRESET
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Maker  TI [TI store]
Homepage  http://www.ti.com
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SN54AHCT74, SN74AHCT74
DUAL POSITIVE-EDGE-TRIGGERED D-TYPE FLIP-FLOPS
WITH CLEAR AND PRESET
SCLS263N – DECEMBER 1995 – REVISED JULY 2003
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
D Inputs Are TTL-Voltage Compatible
D Latch-Up Performance Exceeds 250 mA Per
JESD 17
D ESD Protection Exceeds JESD 22
– 2000-V Human-Body Model (A114-A)
– 200-V Machine Model (A115-A)
– 1000-V Charged-Device Model (C101)
1
2
3
4
5
6
7
14
13
12
11
10
9
8
1CLR
1D
1CLK
1PRE
1Q
1Q
GND
VCC
2CLR
2D
2CLK
2PRE
2Q
2Q
SN54AHCT74 ...J OR W PACKAGE
SN74AHCT74 . . . D, DB, DGV, N, NS,
OR PW PACKAGE
(TOP VIEW)
32 1 20 19
910 11 12 13
4
5
6
7
8
18
17
16
15
14
2D
NC
2CLK
NC
2PRE
1CLK
NC
1PRE
NC
1Q
SN54AHCT74 . . . FK PACKAGE
(TOP VIEW)
NC – No internal connection
SN74AHCT74 . . . RGY PACKAGE
(TOP VIEW)
114
78
2
3
4
5
6
13
12
11
10
9
2CLR
2D
2CLK
2PRE
2Q
1D
1CLK
1PRE
1Q
1Q
description/ordering information
The ’AHCT74 dual positive-edge-triggered devices are D-type 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 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.
ORDERING INFORMATION
TA
PACKAGE†
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
QFN – RGY
Tape and reel
SN74AHCT74RGYR
HB74
PDIP – N
Tube
SN74AHCT74N
SN74AHCT74N
SOIC – D
Tube
SN74AHCT74D
AHCT74
SOIC – D
Tape and reel
SN74AHCT74DR
AHCT74
–40
°C to 85°C
SOP – NS
Tape and reel
SN74AHCT74NSR
AHCT74
SSOP – DB
Tape and reel
SN74AHCT74DBR
HB74
TSSOP
PW
Tube
SN74AHCT74PW
HB74
TSSOP – PW
Tape and reel
SN74AHCT74PWR
HB74
TVSOP – DGV
Tape and reel
SN74AHCT74DGVR
HB74
CDIP – J
Tube
SNJ54AHCT74J
SNJ54AHCT74J
–55
°C to 125°C
CFP – W
Tube
SNJ54AHCT74W
SNJ54AHCT74W
LCCC – FK
Tube
SNJ54AHCT74FK
SNJ54AHCT74FK
† Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines
are available at www.ti.com/sc/package.
Copyright
 2003, Texas Instruments Incorporated
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.
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.
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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