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| 74F545 Datasheet, PDF (6/10 Pages) NXP Semiconductors – Octal bidirectional transceiver with 3-State inputs/outputs | |||
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Philips Semiconductors
Octal bidirectional transceiver (with 3-State inputs/outputs)
Product specification
74F545
AC WAVEFORMS
For all waveforms, VM = 1.5V.
An, Bn
Bn, An
VM
VM
tPLH
VM
tPHL
VM
OE
An, Bn
VM
tPZL
VM
tPLZ
VM
VOL+0.3V
SF00202
Waveform 1. Propagation Delay Data for Non-Inverting Output
OE
An, Bn
VM
tPZH
VM
tPHZ
VM
VOHâ0.3V
0V
SF00203
Waveform 2. 3-State Output Enable Time to High Level
and Output Disable Time from High Level
TEST CIRCUIT AND WAVEFORM
SF00204
Waveform 3. 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
1990 Mar 01
6
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