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SN74LVC257 数据手册 - TI（德州仪器）
制造商:
TI（德州仪器）
描述:
四路2号线到1线数据选择器/复用器，具有三态输出 QUADRUPLE 2-LINE TO 1-LINE DATA SELECTOR/MULTIPLEXER WITH 3-STATE OUTPUTS
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SN74LVC257数据手册
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of 23 Go
若手册格式错乱，请下载阅览PDF原文件
www.ti.com
FEATURES
SN74LVC257A . . . RGY PACKAGE
(TOP VIEW)
1 16
8 9
2
3
4
5
6
7
15
14
13
12
11
10
OE
4A
4B
4Y
3A
3B
1A
1B
1Y
2A
2B
2Y
A/B
3Y
V
GND
CC
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
A/B
1A
1B
1Y
2A
2B
2Y
GND
V
CC
OE
4A
4B
4Y
3A
3B
3Y
SN54LVC257A . . . J OR W PACKAGE
SN74LVC257A . . . D, DB, NS,
OR PW PACKAGE
(TOP VIEW)
3 2 1 20 19
9 10 11 12 13
4
5
6
7
8
18
17
16
15
14
4A
4B
NC
4Y
3A
SN54LVC257A . . . FK PACKAGE
(TOP VIEW)
1A
A/B
NC
3Y
3B
V
OE
2Y
GND
NC
CC
NC − No internal connection
1B
1Y
NC
2A
2B
DESCRIPTION/ORDERING INFORMATION
SN54LVC257A, SN74LVC257A
QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS
WITH 3-STATE OUTPUTS
SCAS294N – JANUARY 1993 – REVISED JUNE 2005
• Typical V
OHV
(Output V
OH
Undershoot)
>2 V at V
CC
= 3.3 V, T
A
= 25°C
• Operate From 1.65 V to 3.6 V
• Latch-Up Performance Exceeds 250 mA Per
• Inputs Accept Voltages to 5.5 V
JESD 17
• Max t
pd
of 4.6 ns at 3.3 V
• ESD Protection Exceeds JESD 22
• Typical V
OLP
(Output Ground Bounce)
– 2000-V Human-Body Model (A114-A)
<0.8 V at V
CC
= 3.3 V, T
A
= 25°C
– 200-V Machine Model (A115-A)
These quadruple 2-line to 1-line data selectors/multiplexers are designed for 1.65-V to 3.6-V V
CC
operation.
The 'LVC257A devices are designed to multiplex signals from 4-bit data sources to 4-output data lines in
bus-organized systems. The 3-state outputs do not load the data lines when the output-enable ( OE) input is at a
high logic level.
ORDERING INFORMATION
T
A
PACKAGE
(1)
ORDERABLE PART NUMBER TOP-SIDE MARKING
QFN – RGY Reel of 1000 SN74LVC257ARGYR LC257A
Tube of 40 SN74LVC257AD
SOIC – D Reel of 2500 SN74LVC257ADR LVC257A
Reel of 250 SN74LVC257ADT
–40°C to 85°C SOP – NS Reel of 2000 SN74LVC257ANSR LVC257A
SSOP – DB Reel of 2000 SN74LVC257ADBR LC257A
Tube of 90 SN74LVC257APW
TSSOP – PW Reel of 2000 SN74LVC257APWR LC257A
Reel of 250 SN74LVC257APWT
CDIP – J Tube of 25 SNJ54LVC257AJ SNJ54LVC257AJ
–55°C to 125°C CFP – W Tube of 150 SNJ54LVC257AW SNJ54LVC257AW
LCCC – FK Tube of 55 SNJ54LVC257AFK SNJ54LVC257AFK
(1) 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.
Copyright © 1993–2005, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
On products compliant to MIL-PRF-38535, all parameters are
Instruments standard warranty. Production processing does not
tested unless otherwise noted. On all other products, production
necessarily include testing of all parameters.
processing does not necessarily include testing of all parameters.
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