74F374 Ver la hoja de datos (PDF) - NXP Semiconductors.
Número de pieza
componentes Descripción
Fabricante
74F374
NXP Semiconductors.
74F374 Datasheet PDF : 13 Pages
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Philips Semiconductors
Latch/flip-flop
Product data
74F373/74F374
AC WAVEFORMS (continued)
For all waveforms, VM = 1.5 V.
The shaded areas indicate when the input is permitted to change for
predictable output performance.
Dn
VM
VM
tsu(H) th(H)
CP
VM
VM
tsu(L)
VM
th(L)
VM
SF00262
Waveform 5. Data set-up time and hold times
OEn
Qn, Qn
VM
tPZL
VM
tPLZ
VM
VOL +0.3V
SF00264
Waveform 7. 3-State output enable time to LOW level
and output disable time from LOW level
OEn
Qn, Qn
VM
tPZH
VM
tPHZ
VM
VOH -0.3V
0V
SF00263
Waveform 6. 3-State output enable time to HIGH level
and output disable time from HIGH level
TEST CIRCUIT AND WAVEFORMS
SWITCH POSITION
TEST SWITCH
tPLZ, tPZL closed
All other open
VIN
PULSE
GENERATOR
VCC
VOUT
D.U.T.
7.0V
RL
RT
CL RL
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.
90%
tw
NEGATIVE
PULSE
VM
10%
VM
10%
90%
tTHL (tf )
tTLH (tr )
POSITIVE
PULSE
10%
tTLH (tr )
tTHL (tf )
90%
90%
VM
VM
10%
tw
Input pulse definition
INPUT PULSE REQUIREMENTS
family
amplitude VM rep. rate
tw
tTLH
74F
3.0V 1.5V 1MHz 500ns 2.5ns
AMP (V)
0V
AMP (V)
0V
tTHL
2.5ns
SF00265
2002 Nov 20
8
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