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SN74LVC257A-Q1

更新时间： 2024-11-04 11:58:39
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德州仪器 - TI 复用器输出元件
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11页 224K
描述
QUADRUPLE 2-LINE TO 1-LINE DATA SELECTOR/MULTIPLEXER WITH 3-STATE OUTPUTS

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SN74LVC257A-Q1 数据手册

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SN74LVC257A-Q1  
QUADRUPLE 2-LINE TO 1-LINE DATA SELECTOR/MULTIPLEXER  
WITH 3-STATE OUTPUTS  
www.ti.com  
SCAS709B–SEPTEMBER 2003–REVISED FEBRUARY 2008  
1
FEATURES  
•
Qualified for Automotive Applications  
D OR PW PACKAGE  
(TOP VIEW)  
•
ESD Protection Exceeds 2000 V Per  
MIL-STD-883, Method 3015; Exceeds 200 V  
Using Machine Model (C = 200 pF, R = 0)  
A/B  
1A  
VCC  
OE  
4A  
1
2
3
4
5
6
7
8
16  
15  
14  
13  
•
•
•
•
Operates From 2 V to 3.6 V  
Inputs Accept Voltages to 5.5 V  
Max tpd of 4.6 ns at 3.3 V  
1B  
1Y  
4B  
2A  
12 4Y  
Typical VOLP (Output Ground Bounce) < 0.8 V  
at VCC = 3.3 V, TA = 25°C  
11  
10  
9
2B  
3A  
3B  
3Y  
2Y  
•
Typical VOHV (Output VOH Undershoot) > 2 V  
at VCC = 3.3 V, TA = 25°C  
GND  
DESCRIPTION/ORDERING INFORMATION  
The SN74LVC257A quadruple 2-line to 1-line data selector/multiplexer is designed for 2.7-V to 3.6-V VCC  
operation.  
The device is 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.  
Inputs can be driven from either 3.3-V or 5-V devices. This feature allows the use of this device as a translator in  
a mixed 3.3-V/5-V system environment.  
To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup  
resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.  
ORDERING INFORMATION(1)  
TA  
PACKAGE(2)  
Reel of 2500  
Reel of 2000  
ORDERABLE PART NUMBER  
SN74LVC257AQDRQ1  
TOP-SIDE MARKING  
L257AQ1  
SOIC – D  
–40°C to 125°C  
TSSOP – PW  
SN74LVC257AQPWRQ1  
L257AQ1  
(1) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI  
web site at www.ti.com.  
(2) Package drawings, thermal data, and symbolization are available at www.ti.com/packaging.  
FUNCTION TABLE  
INPUTS  
OUTPUT  
Y
OE  
H
L
A/B  
X
A
X
L
B
X
X
X
L
Z
L
L
L
L
H
X
X
H
L
L
H
L
H
H
H
1
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 the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 2003–2008, Texas Instruments Incorporated  
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SN74LVC257A-Q1 替代型号

型号 品牌 替代类型 描述 数据表
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