74F38 데이터 시트보기 (PDF) - Philips Electronics
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74F38 Datasheet PDF : 8 Pages
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Philips Semiconductors
Quad 2-input NAND buffer (open collector)
Product specification
74F38
TEST CIRCUIT AND WAVEFORM
VCC
7.0V
90%
tw
90%
AMP (V)
VIN
VOUT
RL
PULSE
D.U.T.
GENERATOR
NEGATIVE
PULSE
VM
10%
VM
10%
0V
tTHL (tf )
tTLH (tr )
RT
CL RL
Test Circuit for Open Collector Outputs
POSITIVE
PULSE
tTLH (tr )
90%
VM
tTHL (tf )
90%
VM
AMP (V)
DEFINITIONS:
RL = Load resistor;
see AC electrical characteristics for value.
CL = Load capacitance includes jig and probe capacitance;
see AC electrical characteristics for value.
RT = Termination resistance should be equal to ZOUT of
pulse generators.
10%
tw
10%
0V
Input Pulse Definition
INPUT PULSE REQUIREMENTS
family
amplitude VM rep. rate
tw
tTLH
tTHL
74F
3.0V 1.5V 1MHz 500ns 2.5ns 2.5ns
SF00027
October 4, 1990
5
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