74F298 데이터 시트보기 (PDF) - Philips Electronics
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74F298 Datasheet PDF : 8 Pages
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Philips Semiconductors
Quad 2-input multiplexer with storage
Product specification
74F298
AC SETUP REQUIREMENTS
SYMBOL
PARAMETER
ts(H)
ts(L)
th(H)
th(L)
ts(H)
ts(L)
th(H)
th(L)
tw(H)
tw(L)
Setup time, High or Low
I0n, I1n to CP
Hold time, High or Low
I0n, I1n to CP
Setup time, High or Low
S to CP
Hold time, High or Low
S to CP
CP Pulse width,
High or Low
TEST
CONDITION
Waveform
NO TAG
Waveform
NO TAG
Waveform
NO TAG
Waveform
NO TAG
Waveform
NO TAG
LIMITS
Tamb = +25°C
VCC = +5.0V
CL = 50pF
RL = 500Ω
MIN TYP MAX
Tamb = 0°C to +70°C
VCC = +5.0V ± 10%
CL = 50pF
RL = 500Ω
MIN
MAX
2.0
2.0
2.0
2.0
1.0
1.0
1.0
1.0
6.0
7.0
5.0
6.0
0
0
0
0
5.0
5.0
5.0
7.0
AC WAVEFORMS
For all waveforms, VM = 1.5V.
The shaded areas indicate when the input is permitted to change for predictable output performance.
UNIT
ns
ns
ns
ns
ns
1/fMAX
CP
VM
tW(L)
tPLH
tW(H)
VM
tPHL
Qn
VM
VM
SF00863
Waveform 1. Clock Input to Output, Clock Pulse Width, and
Maximum Clock Frequency
Ion, I1n, S
VM
ts(H)
VM
th(H)
CP
VM
VM
ts(L)
VM
th(L)
VM
SF00864
Waveform 2. Data Setup and Hold Times
TEST CIRCUIT AND WAVEFORMS
VIN
PULSE
GENERATOR
VCC
VOUT
D.U.T.
NEGATIVE
PULSE
90%
tw
VM
10%
tTHL (tf )
VM
10%
tTLH (tr )
90%
AMP (V)
0V
RT
CL RL
Test Circuit for Totem-Pole Outputs
POSITIVE
PULSE
10%
tTLH (tr )
90%
VM
tw
tTHL (tf )
90%
VM
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 Definition
family
74F
INPUT PULSE REQUIREMENTS
amplitude VM rep. rate
tw
tTLH
3.0V 1.5V 1MHz 500ns 2.5ns
tTHL
2.5ns
SF00006
1989 Aug 14
5
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