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M74HC257TTR Datasheet(PDF) 6 Page - STMicroelectronics

No. de pieza M74HC257TTR
Descripción Electrónicos  QUAD 2 CHANNEL MULTIPLEXER (3-STATE)
PDF  11 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M74HC257TTR Datasheet(HTML) 6 Page - STMicroelectronics

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M74HC257
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TEST CIRCUIT
CL = 50pF/150pF or equivalent (includes jig and probe capacitance)
R1 = 1KΩ or equivalent
RT = ZOUT of pulse generator (typically 50Ω)
WAVEFORM 1: PROPAGATION DELAY TIME (f=1MHz; 50% duty cycle)
TEST
SWITCH
tPLH, tPHL
Open
tPZL, tPLZ
VCC
tPZH, tPHZ
GND



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