SN74LVC257A-Q1 Datasheet, PDF (1/11 Pages) Texas Instruments – QUADRUPLE 2-LINE TO 1-LINE DATA SELECTOR/MULTIPLEXER WITH 3-STATE OUTPUTS

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SN74LVC257A-Q1
QUADRUPLE 2-LINE TO 1-LINE DATA SELECTOR/MULTIPLEXER
WITH 3-STATE OUTPUTS
SCAS709B – SEPTEMBER 2003 – REVISED FEBRUARY 2008
FEATURES
1
• Qualified for Automotive Applications
• ESD Protection Exceeds 2000 V Per
MIL-STD-883, Method 3015; Exceeds 200 V
Using Machine Model (C = 200 pF, R = 0)
• Operates From 2 V to 3.6 V
• Inputs Accept Voltages to 5.5 V
• Max t_pd of 4.6 ns at 3.3 V
• Typical V_OLP (Output Ground Bounce) < 0.8 V
at V_CC = 3.3 V, T_A = 25°C
• Typical V_OHV (Output V_OH Undershoot) > 2 V
at V_CC = 3.3 V, T_A = 25°C
D OR PW PACKAGE
(TOP VIEW)
A/B 1
1A 2
1B 3
1Y 4
2A 5
2B 6
2Y 7
GND 8
16 VCC
15 OE
14 4A
13 4B
12 4Y
11 3A
10 3B
9 3Y
DESCRIPTION/ORDERING INFORMATION
The SN74LVC257A quadruple 2-line to 1-line data selector/multiplexer is designed for 2.7-V to 3.6-V V_CC
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 V_CC through a pullup
resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
T_A
–40°C to 125°C
ORDERING INFORMATION⁽¹⁾
PACKAGE ⁽²⁾
ORDERABLE PART NUMBER
SOIC – D
Reel of 2500
SN74LVC257AQDRQ1
TSSOP – PW
Reel of 2000
SN74LVC257AQPWRQ1
TOP-SIDE MARKING
L257AQ1
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
OE
A/B
A
B
Y
H
X
X
X
Z
L
L
L
X
L
L
L
H
X
H
L
H
X
L
L
L
H
X
H
H
1
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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