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N74456N Datasheet(PDF) 8 Page - NXP Semiconductors

Part No. N74456N
Description  Buffers/drivers
Download  12 Pages
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Maker  PHILIPS [NXP Semiconductors]
Homepage  http://www.nxp.com
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N74456N Datasheet(HTML) 8 Page - NXP Semiconductors

 
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Philips Semiconductors
Product specification
74F455,* 74F456
Buffers/Drivers
1999 Jan 08
8
* Discontinued part. Please see the Discontinued Products List.
AC WAVEFORMS
For all waveforms, VM = 1.5V.
SF00965
VM
VM
VM
VM
tPHL
tPLH
Dn
SE, SO, Qn
Waveform 1. Propagation Delay, Non-Inverting Outputs
SF00966
VM
VM
VM
VM
tPHL
tPLH
Dn
SE, SO, Qn
Waveform 2. Propagation Delay, Inverting Outputs
VM
VM
VM
tPHZ
tPZH
VOH -0.3V
0V
OEn
SF00967
SE, SO, Qn, Qn
Waveform 3. 3-State Output Enable Time to High Level and
Output Disable Time from High Level
VM
VM
VM
tPLZ
tPZL
VOL +0.3V
OEn
SF00968
SE, SO, Qn, Qn
Waveform 4. 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)
0V
0V
tTHL (tf )
INPUT PULSE REQUIREMENTS
rep. rate
tw
tTLH
tTHL
1MHz
500ns
2.5ns
2.5ns
Input Pulse Definition
VCC
family
74F
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
3.0V
1.5V
VM
RL
7.0V
SF00777
TEST
SWITCH
tPLZ
closed
tPZL
closed
All other
open
SWITCH POSITION


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