74F2240 Ver la hoja de datos (PDF) - Philips Electronics
Número de pieza
componentes Descripción
Lista de partido
74F2240 Datasheet PDF : 10 Pages
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Philips Semiconductors
Octal buffers
Product specification
74F2240, 74F2241
AC WAVEFORMS
Ian, Ibn VM
tPHL
VM
tPLH
Ian, Ibn
VM
tPLH
VM
tPHL
Yn
VM
VM
SF00328
Waveform 1. Propagation delay for inverting outputs
OEn
OEb
Yn, Yn
VM
tPZH
VM
tPHZ
VM
VOH -0.3V
0V
SF00330
Waveform 3. 3-state output enable time to high level and output
disable time from high level
Yn
VM
VM
SF00329
Waveform 2. Propagation delay for non–inverting outputs
OEn
OEb
Yn, Yn
VM
tPZL
VM
tPLZ
VM
3.5V
VOL +0.3V
SF00331
Waveform 4. 3-state output enable time to low level and output
disable time from low level
NOTES:
For all waveforms, VM = 1.5V.
The shaded areas indicate when the input is permitted to change for predictable output performance.
TEST CIRCUIT AND WAVEFORMS
VCC
VIN
PULSE
GENERATOR
VOUT
RL
D.U.T.
RT
CL RL
Test Circuit for Open Collector 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
SF00128
December 13, 1990
6
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