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參數資料
| 型號： | SNJ54HCT74W |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 鎖存器 |
| 英文描述： | HCT SERIES, DUAL POSITIVE EDGE TRIGGERED D FLIP-FLOP, COMPLEMENTARY OUTPUT, CDFP14 |
| 封裝： | CERAMIC, DFP-14 |
| 文件頁數： | 1/19頁 |
| 文件大小： | 811K |
| 代理商： | SNJ54HCT74W |
SN54HCT74, SN74HCT74
DUAL DTYPE POSITIVEEDGETRIGGERED FLIPFLOPS
WITH CLEAR AND PRESET
SCLS169E DECEMBER 1982 REVISED APRIL 2004
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
D Operating Voltage Range of 4.5 V to 5.5 V
D Outputs Can Drive Up To 10 LSTTL Loads
D Low Power Consumption, 40-A Max ICC
D Typical tpd = 17 ns
D ±4-mA Output Drive at 5 V
D Low Input Current of 1 A Max
D Inputs Are TTL-Voltage Compatible
description/ordering information
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.
ORDERING INFORMATION
TA
PACKAGE
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
PDIP N
Tube of 25
SN74HCT74N
Tube of 50
SN74HCT74D
SOIC D
Reel of 2500
SN74HCT74DR
HCT74
SOIC D
Reel of 250
SN74HCT74DT
HCT74
40
°C to 85°C
SOP NS
Reel of 2000
SN74HCT74NSR
HCT74
40 C to 85 C
SSOP DB
Reel of 2000
SN74HCT74DBR
HT74
Tube of 90
SN74HCT74PW
TSSOP PW
Reel of 2000
SN74HCT74PWR
HT74
TSSOP PW
Reel of 250
SN74HCT74PWT
HT74
CDIP J
Tube of 25
SNJ54HCT74J
55
°C to 125°C
CFP W
Tube of 150
SNJ54HCT74W
55 C to 125 C
LCCC FK
Tube of 55
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.
1
2
3
4
5
6
7
14
13
12
11
10
9
8
1CLR
1D
1CLK
1PRE
1Q
GND
VCC
2CLR
2D
2CLK
2PRE
2Q
SN54HCT74 ...J OR W PACKAGE
SN74HCT74 . . . D, DB, N, NS, OR PW PACKAGE
(TOP VIEW)
32 1 20 19
910 11 1213
4
5
6
7
8
18
17
16
15
14
2D
NC
2CLK
NC
2PRE
1CLK
NC
1PRE
NC
1Q
1D
1CLR
NC
2Q
V
2CLR
1Q
GND
NC
SN54HCT74 . . . FK PACKAGE
(TOP VIEW)
CC
NC No internal connection
Copyright
2004, 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.
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