74F655A Просмотр технического описания (PDF) - Philips Electronics
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74F655A Datasheet PDF : 12 Pages
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Philips Semiconductors
Buffers/drivers
Product specification
74F655A*
74F656A
AC WAVEFORMS
Dn
SE, SO, Qn
VM
VM
tPLH
tPHL
VM
VM
SF00965
Waveform 1. Propagation Delay, Non-Inverting Outputs
Dn
SE, SO, Qn
VM
VM
tPHL
tPLH
VM
VM
SF00966
Waveform 2. Propagation Delay, Inverting Outputs
OEn
SE, SO, Qn, Qn
VM
tPZH
VM
tPHZ
VM
VOH -0.3V
0V
SF00967
Waveform 3. 3-State Output Enable Time to High Level
and Output Disable Time from High Level
TEST CIRCUIT AND WAVEFORM
OEn
VM
VM
tPZL
tPLZ
SE, SO, Qn, Qn
VM
VOL +0.3V
SF00968
Waveform 4. 3-State Output Enable Time to Low Level
and Output Disable Time from Low Level
VCC
VIN
PULSE
GENERATOR
VOUT
RL
D.U.T.
RT
CL RL
Test Circuit for 3-State Outputs
SWITCH POSITION
TEST
tPLZ
tPZL
All other
SWITCH
closed
closed
open
7.0V
90%
NEGATIVE
PULSE
POSITIVE
PULSE
10%
tw
VM
10%
tTHL (tf )
VM
10%
tTLH (tr )
tTLH (tr )
90%
VM
tw
tTHL (tf )
90%
VM
Input Pulse Definition
90%
AMP (V)
0V
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 REQUIREMENTS
family
amplitude VM rep. rate
tw
tTLH
74F
3.0V 1.5V 1MHz 500ns 2.5ns
tTHL
2.5ns
SF00777
* Discontinued part. Please see the Discontinued Products List.
1991 Jul 17
8
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