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74ALS645A-1N Datasheet(PDF) 5 Page - NXP Semiconductors

Part # 74ALS645A-1N
Description  Octal transceiver 3-State
Download  8 Pages
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Manufacturer  PHILIPS [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

74ALS645A-1N Datasheet(HTML) 5 Page - NXP Semiconductors

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Philips Semiconductors
Product specification
74ALS645A/74ALS645A-1
Octal transceiver (3-State)
1991 Jun 03
5
AC WAVEFORMS
For all waveforms, VM = 1.3V.
VM
VM
VM
VM
tPHL
tPLH
An, Bn
Bn, An
SC00096
Waveform 1.
Propagation Delay for Non-inverting Outputs
VM
VM
VM
tPHZ
tPZH
OE
An, Bn
VOH -0.3V
0V
SC00094
Waveform 2.
3-State Output Enable Time to High Level
and Output Disable Time from High Level
VM
VM
VM
tPLZ
tPZL
OE
An, Bn
VOL +0.3V
SC00095
3.5V
Waveform 3.
3-State Output Enable Time to Low Level
and Output Disable Time from Low Level
TEST CIRCUIT AND WAVEFORMS
tw
90%
VM
10%
90%
VM
10%
90%
VM
10%
90%
VM
10%
NEGATIVE
PULSE
POSITIVE
PULSE
tw
AMP (V)
0.3V
0.3V
tTHL (tff)
INPUT PULSE REQUIREMENTS
Rep.Rate
tw
tTLH
tTHL
1MHz
500ns
2.0ns
2.0ns
Input Pulse Definition
VCC
Family
74ALS
D.U.T.
PULSE
GENERATOR
RL
CL
RT
VIN
VOUT
Test Circuit for 3-State Outputs
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.
tTHL (tf )
tTLH (tr )
tTLH (tr )
AMP (V)
Amplitude
3.5V
1.3V
VM
SC00072
RL
7.0V
SWITCH POSITION
TEST
SWITCH
tPLZ, tPZL
closed
All other
open


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