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74F2245 Fiches technique(PDF) 6 Page - NXP Semiconductors

No de pièce 74F2245
Description  Octal transceiver with 30ohm equivalent output termination 3-State
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Fabricant  PHILIPS [NXP Semiconductors]
Site Internet  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

74F2245 Fiches technique(HTML) 6 Page - NXP Semiconductors

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Philips Semiconductors
Product specification
74F2245
Octal transceiver with 30
W equivalent output termination
(3-State)
1996 May 10
6
AC WAVEFORMS
For all waveforms, VM = 1.5V.
VM
VM
VM
VM
Bn, An
An, Bn
tPLH
tPHL
SF00202
Waveform 1.
Propagation Delay for Non-Inverting Output
VOH–0.3V
VM
VM
VM
An, Bn
tPZH
tPHZ
SF00203
OE
0V
Waveform 2.
3-State Output Enable Time to High Level and
Output Disable Time from High Level
VOL+0.3V
VM
VM
VM
An, Bn
tPZL
tPLZ
SF00204
OE
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)
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 Open Collector 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
SF00128
TEST
SWITCH
tPLZ
closed
tPZL
closed
All other
open
SWITCH POSITION


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