N74F20D 데이터 시트보기 (PDF) - Philips Electronics
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N74F20D Datasheet PDF : 8 Pages
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Philips Semiconductors
Dual 4-input NAND gate
Product specification
74F20
AC ELECTRICAL CHARACTERISTICS
SYMBOL
PARAMETER
tPLH
Propagation delay
tPHL
Dna, Dnb, Dnc, Dnd to Qn
AC WAVEFORMS
TEST
CONDITION
Waveform 1
LIMITS
VCC = +5.0V
Tamb = +25°C
CL = 50pF, RL = 500Ω
VCC = +5.0V ± 10%
Tamb = 0°C to +70°C
CL = 50pF, RL = 500Ω
MIN
TYP MAX
MIN
MAX
2.4
3.7
5.0
2.4
6.0
2.0
3.2
4.3
2.0
5.3
UNIT
ns
Dna, Dnb, Dnc, Dnd
VM
VM
tPHL
tPLH
Qn
VM
VM
NOTE:
For all waveforms, VM = 1.5V.
SF00069
Waveform 1. Propagation Delay for Inverting Outputs
TEST CIRCUIT AND WAVEFORMS
VIN
PULSE
GENERATOR
VCC
VOUT
D.U.T.
NEGATIVE
PULSE
90%
tw
VM
10%
tTHL (tf )
VM
10%
tTLH (tr )
90%
AMP (V)
0V
RT
CL RL
Test Circuit for Totem-Pole Outputs
POSITIVE
PULSE
10%
tTLH (tr )
90%
VM
tw
tTHL (tf )
90%
VM
AMP (V)
10%
0V
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.
Input Pulse Definition
family
74F
INPUT PULSE REQUIREMENTS
amplitude VM rep. rate
tw
tTLH
3.0V 1.5V 1MHz 500ns 2.5ns
tTHL
2.5ns
SF00006
March 3, 1989
4
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