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74AC11257 Datasheet(PDF) 5 Page - Texas Instruments

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Part No. 74AC11257
Description  QUADRUPLE 2-LINE TO 1-LINE DATA SELECTOR/MULTIPLEXER WITH 3-STATE OUTPUTS
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
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74AC11257 Datasheet(HTML) 5 Page - Texas Instruments

 
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74AC11257
QUADRUPLE 2LINE TO 1LINE DATA SELECTOR/MULTIPLEXER
WITH 3STATE OUTPUTS
SCAS049C − MARCH 1989 − REVISED MAY 2004
5
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
PARAMETER MEASUREMENT INFORMATION
50% VCC
tPLH
tPHL
tPHL
tPLH
VOH
VOH
VOL
VOL
50%
50%
VCC
0 V
50% VCC
50% VCC
Input
Out-of-Phase
Output
In-Phase
Output
50% VCC
VOLTAGE WAVEFORMS
From Output
Under Test
CL = 50 pF
(see Note A)
LOAD CIRCUIT
S1
2
× VCC
500
500
Output
Control
(low-level
enabling)
Output
Waveform 1
S1 at 2
× VCC
(see Note B)
Output
Waveform 2
S1 at GND
(see Note B)
VOL
VOH
tPZL
tPZH
tPLZ
tPHZ
50%
50%
[ VCC
0 V
50% VCC
20% VCC
50% VCC
80% VCC
[ 0 V
VCC
GND
Open
VOLTAGE WAVEFORMS
tPLH/tPHL
tPLZ/tPZL
tPHZ/tPZH
Open
2
× VCC
GND
TEST
S1
NOTES: A. CL includes probe and jig capacitance.
B. Waveform 1 is for an output with internal conditions such that the output is low, except when disabled by the output control.
Waveform 2 is for an output with internal conditions such that the output is high, except when disabled by the output control.
C. All input pulses are supplied by generators having the following characteristics: PRR
≤ 1 MHz, ZO = 50 Ω, tr = 3 ns, tf = 3 ns.
D. The outputs are measured one at a time, with one input transition per measurement.
Figure 1. Load Circuit and Voltage Waveforms


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