74F579 查看數據表（PDF） - Philips Electronics
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74F579 Datasheet PDF : 14 Pages
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Philips Semiconductors
8-bit bidirectional binary counter (3-State)
Product specification
74F579
AC SETUP REQUIREMENTS
SYMBOL
PARAMETER
TEST CONDITIONS
ts(H)
ts(L)
th(H)
th(L)
ts(H)
ts(L)
th(H)
th(L)
ts(H)
ts(L)
th(H)
th(L)
ts(H)
ts(L)
th(H)
th(L)
tw(H)
tw(L)
tw(L)
trec
Setup time, High or Low
I/On to CP
Hold time, High or Low
I/On to CP
Setup time, High or Low
U/D to CP
Hold time, High or Low
U/D to CP
Setup time, High or Low
PE, SR or CS to CP
Hold time, High or Low
PE, SR or CS to CP
Setup time, High or Low
CEP or CET to CP
Hold time, High or Low
CEP or CET to CP
CP Pulse width, High or Low
MR Pulse width, Low
Recovery time, MR to CP
Waveform 5
Waveform 5
Waveform 5
Waveform 5
Waveform 5
Waveform 5
Waveform 5
Waveform 5
Waveform 1
Waveform 2
Waveform 2
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
3.0
4.0
3.0
4.0
0
0
0
0
8.0
9.0
8.0
9.0
0
0
0
0
9.5
10.0
9.5
10.0
0
0
0
0
5.0
5.5
9.0
10.5
0
0
0
0
4.5
4.5
4.5
4.5
3.0
3.0
4.0
4.5
UNIT
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
1992 May 04
8
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