N74F1779N 查看數據表（PDF） - Philips Electronics
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N74F1779N Datasheet PDF : 12 Pages
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Philips Semiconductors
8-bit bidirectional binary counter (3-State)
Product specification
74F1779
AC SETUP REQUIREMENTS
SYMBOL
PARAMETER
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)
Setup time, High or Low
I/On to CP
Hold time, High or Low
I/On to CP
Setup time, High or Low
CET to CP
Hold time, High or Low
CET to CP
Setup time, High or Low
Sn to CP
Hold time, High or Low
Sn to CP
CP Pulse width,
High or Low
TEST
CONDITION
Waveform 3
Waveform 3
Waveform 3
Waveform 3
Waveform 3
Waveform 3
Waveform 1
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
4.0
4.5
3.5
3.5
0
0
0
0
4.5
5.0
7.0
8.0
0
0
0
0
7.5
8.0
8.5
9.5
0
0
0
0
3.0
3.0
4.5
5.5
UNIT
ns
ns
ns
ns
ns
ns
ns
AC WAVEFORMS
For all waveforms, VM = 1.5V.
The shaded areas indicate when the input is permitted to change for predictable output performance.
1/fMAX
CP
I/On
TC
VM
tW(H)
tPLH
VM
tPHL
VM
tW(L)
VM
tPHL
VM
tPLH
VM
SF01263
Waveform 1. Propagation Delay, Clock Input to Output,
Clock Pulse Width, and Maximum Clock Frequency
Sn, I/On,
CET
VM
VM
ts(H) th(H)
VM
VM
ts(L) th(L)
CP
VM
VM
SF01265
Waveform 3. Data Setup and Hold Times
OE
VM
tPZH
VM
tPHZ
VOH -0.3V
CET
TC
VM
VM
tPHL
VM
tPLH
VM
I/On
VM
0V
SF01266
Waveform 4. 3-State Output Enable Time to High Level
and Output Disable Time from High Level
SF01264
Waveform 2. Propagation Delay,
CET Input to Terminal Count Output
OE
I/On
VM
tPZL
VM
VM
tPLZ
3.5V
VOL +0.3V
SF01267
Waveform 5. 3-State Output Enable Time to Low Level
and Output Disable Time from Low Level
1989 Apr 06
7
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