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SN74HCT157 Scheda tecnica(PDF) 5 Page - Texas Instruments

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Il numero della parte SN74HCT157
Spiegazioni elettronici  QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS
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SN74HCT157 Scheda tecnica(HTML) 5 Page - Texas Instruments

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SN54HCT157, SN74HCT157
QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS
SCLS071B – NOVEMBER 1988 – REVISED MAY 1997
5
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
PARAMETER MEASUREMENT INFORMATION
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
1.3 V
1.3 V
1.3 V
10%
10%
90%
90%
3 V
VOH
VOL
0 V
tr
tf
Input
(see Note B)
Output
1.3 V
tPLH
tPHL
Test
Point
From Output
Under Test
LOAD CIRCUIT
NOTES: A. CL includes probe and test-fixture capacitance.
B. Phase relationships between waveforms were chosen arbitrarily. All input pulses are supplied by generators having the following
characteristics: PRR
≤ 1 MHz, ZO = 50 Ω, tr = 6 ns, tf = 6 ns.
C. The outputs are measured one at a time with one input transition per measurement.
D. tPLH and tPHL are the same as tpd.
CL = 50 pF
(see Note A)
Figure 1. Load Circuit and Voltage Waveforms


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