N74F85D Просмотр технического описания (PDF) - Philips Electronics
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N74F85D Datasheet PDF : 10 Pages
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Philips Semiconductors
4-bit magnitude comparator
Product specification
74F85
AC ELECTRICAL CHARACTERISTICS
SYMBOL
PARAMETER
tPLH
Propagation delay
tPHL
A or B to A<B, A>B
tPLH
Propagation delay
tPHL
A or B to A=B
tPLH
Propagation delay
tPHL
IA<B and IA=B to A>B
tPLH
Propagation delay
tPHL
IA=B to A=B
tPLH
Propagation delay
tPHL
IA>B and IA=B to A<B
AC WAVEFORMS
TEST
CONDITION
Waveform 1
3 logic levels
Waveform 1
4 logic levels
Waveform 1
1 logic level
Waveform 1
2 logic levels
Waveform 1
1 logic level
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
6.0
8.5
11.0
5.5
13.0
7.0
9.5
14.0
6.5
15.5
6.5
9.0
11.5
6.0
14.0
7.0
9.5
14.0
6.5
14.5
3.0
5.0
7.5
2.5
9.0
3.0
6.0
9.0
2.5
10.0
2.5
4.5
7.0
2.0
9.0
3.5
7.5
10.0
2.5
12.0
3.0
5.0
8.0
3.0
9.5
3.0
6.0
9.0
2.0
9.5
UNIT
ns
ns
ns
ns
ns
VIN
VOUT
VM
tPHL
VM
tPLH
VM
VM
SF00080
Waveform 1. Propagation Delay Input to Output
NOTE:
For all waveforms, VM = 1.5V.
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
September 27, 1994
6
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