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SN74HC251PWTE4 参数 Datasheet PDF下载

SN74HC251PWTE4图片预览
型号: SN74HC251PWTE4
PDF下载: 下载PDF文件 查看货源
内容描述: 数据选择器/多路复用器三态输出 [DATA SELECTORS/MULTIPLEXERS WITH 3-STATE OUTPUTS]
分类和应用: 解复用器逻辑集成电路光电二极管输出元件
文件页数/大小: 17 页 / 489 K
品牌: TI [ TEXAS INSTRUMENTS ]
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SCLS132E − DECEMBER 1982 − REVISED SEPTEMBER 2003
SN54HC251, SN74HC251
DATA SELECTORS/MULTIPLEXERS
WITH 3 STATE OUTPUTS
D
3-State Version of ’HC151
D
Wide Operating Voltage Range of 2 V to 6 V
D
High-Current 3-State Outputs Interface
D
D
D
D
D
D
Directly With System Bus or Can Drive Up
To 15 LSTTL Loads
Low Power Consumption, 80-µA Max I
CC
Typical t
pd
= 9 ns
±6-mA
Output Drive at 5 V
Low Input Current of 1
µA
Max
Perform Parallel-to-Serial Conversion
Complementary Outputs Provide True and
Inverted Data
SN54HC251 . . . J OR W PACKAGE
SN74HC251 . . . D, DB, N, NS, OR PW PACKAGE
(TOP VIEW)
D3
D2
D1
D0
Y
W
OE
GND
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
V
CC
D4
D5
D6
D7
A
B
C
These data selectors/multiplexers contain full
binary decoding to select 1-of-8 data sources and
feature strobe-controlled complementary 3-state
outputs.
The 3-state outputs can interface with and drive
data lines of bus-organized systems. With all but
one of the common outputs disabled (in the
high-impedance state), the low impedance of the
single enabled output drives the bus line to a high
or low logic level. Both outputs are controlled by
the output-enable (OE) input. The outputs are
disabled when OE is high.
ORDERING INFORMATION
TA
PDIP − N
PACKAGE†
Tube of 25
Tube of 40
SOIC − D
−40 C 85°C
−40°C to 85 C
SOP − NS
SSOP − DB
Reel of 2500
Reel of 250
Reel of 2000
Reel of 2000
Tube of 90
TSSOP − PW
CDIP − J
−55 C 125°C
−55°C to 125 C
CFP − W
LCCC − FK
Reel of 2000
Reel of 250
Tube of 25
Tube of 150
Tube of 55
D1
D0
NC
Y
W
4
5
6
7
8
3 2 1 20 19
18
17
16
15
14
9 10 11 12 13
D2
D3
NC
V
CC
D4
D5
D6
NC
D7
A
NC − No internal connection
ORDERABLE
PART NUMBER
SN74HC251N
SN74HC251D
SN74HC251DR
SN74HC251DT
SN74HC251NSR
SN74HC251DBR
SN74HC251PW
SN74HC251PWR
SN74HC251PWT
SNJ54HC251J
SNJ54HC251W
SNJ54HC251FK
SNJ54HC251J
SNJ54HC251W
SNJ54HC251FK
HC251
HC251
HC251
HC251
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.
description/ordering information
SN54HC251 . . . FK PACKAGE
(TOP VIEW)
† 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.
Copyright
2003, Texas Instruments Incorporated
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
OE
GND
NC
C
B
TOP-SIDE
MARKING
SN74HC251N
1