74F280 View Datasheet(PDF) - Philips Electronics
Part Name
Description
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74F280 Datasheet PDF : 8 Pages
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Philips Semiconductors
9-bit odd/even parity generator/checker
Product specification
74F280B
AC ELECTRICAL CHARACTERISTICS
SYMBOL
PARAMETER
TEST
CONDITIONS
tPLH
tPHL
Propagation delay
I0 - I8 to ΣE
Waveform 1, 2
74F280B
tPLH
Propagation delay
tPHL
I0 - I8 to ΣO
Waveform 1, 2
Tamb= +25°C
VCC = +5.V
CL = 50pF,
RL = 500Ω
Min Typ Max
LIMITS
Tamb = 0°C to +70°C
VCC = +5.V ± 10%
CL = 50pF,
RL = 500Ω
Min
Max
Tamb = -40°C to +85°C
VCC = +5.V ± 10%
CL = 50pF,
RL = 500Ω
Min
Max
4.0 6.5 9.0
3.5
10.0
3.0
11.0
4.0 7.0 10.0
3.5
11.1
3.5
12.0
4.0 6.5 9.0
3.5
10.0
3.0
11.0
4.0 7.0 10.0
3.5
11.0
3.5
12.0
UNIT
ns
ns
ns
ns
AC WAVEFORMS
For all waveforms, VM=1.5V.
I0 - I8
VM
VM
I0 - I8
VM
VM
tPHL
tPLH
ΣE, ΣO
VM
VM
SF00848
Waveform 1. Propagation Delay for Inverting Outputs
tPLH
tPHL
ΣE, ΣO
VM
VM
SF00850
Waveform 2. Propagation Delay for Non-Inverting Outputs
TEST CIRCUIT AND WAVEFORM
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
1996 Mar 12
5
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