74F2952 查看數據表（PDF） - Philips Electronics
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74F2952 Datasheet PDF : 14 Pages
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Philips Semiconductors
Transceivers
Product specification
74F2952, 74F2953
AC WAVEFORMS
For all waveforms, VM = 1.5V.
The shaded areas indicate when the input is permitted to change for predictable output.
CPBA
or
CPAB
An or Bn
1/fMAX
VM
VM
tW(H)
tPHL
tW(L)
VM
VM
tPLH
VM
SF01161
Waveform 1. Propagation Delay, Clock Input to Output,
Clock Pulse Width, and Maximum Clock Frequency
An, Bn
CEAB,
CEBA
CPAB,
CPBA
VM
VM
ts(H) th(H)
VM
VM VM
ts(L) th(H)
VM
SF01381
Waveform 2. Data Setup and Hold Times
OEAB,
OEBA
An, Bn
VM
tPZH
VM
tPHZ
VM
VOH -0.3V
0V
SF01382
Waveform 3. 3-State Output Enable Time to High Level
and Output Disable Time from High Level
OEAB,
OEBA
An, Bn
VM
tPZL
VM
tPLZ
VM
VOL +0.3V
SF01383
Waveform 4. 3-State Output Enable Time to Low Level
and Output Disable Time from Low Level
TEST CIRCUIT AND WAVEFORMS
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
1989 Sep 22
9
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