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74F779 Datasheet(PDF) 7 Page - NXP Semiconductors

Part # 74F779
Description  8-bit bidirectional binary counter 3-State
PDF  12 Pages
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Manufacturer  PHILIPS [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

74F779 Datasheet(HTML) 7 Page - NXP Semiconductors

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Philips Semiconductors
Product specification
74F779
8-bit bidirectional binary counter (3-State)
1989 Sep 20
7
AC SETUP REQUIREMENTS
LIMITS
SYMBOL
PARAMETER
TEST CONDITIONS
Tamb = +25°C
VCC = +5V
CL = 50pF, RL = 500Ω
Tamb = 0°C to +70°C
VCC = +5V ± 10%
CL = 50pF, RL = 500Ω
UNIT
MIN
TYP
MAX
MIN
MAX
ts(H)
ts(L)
Setup time, High or Low
I/On to CP
Waveform 3
5.0
5.0
5.0
5.0
ns
ns
th(H)
th(L)
Hold time, High or Low
I/On to CP
Waveform 3
1.0
1.0
1.0
1.0
ns
ns
ts(H)
ts(L)
Setup time, High or Low
CET to CP
Waveform 3
5.0
5.5
5.0
6.0
ns
ns
th(H)
th(L)
Hold time, High or Low
CET to CP
Waveform 3
0
0
0
0
ns
ns
ts(H)
ts(L)
Setup time, High or Low
Sn to CP
Waveform 3
8.0
8.0
8.5
8.5
ns
ns
th(H)
th(L)
Hold time, High or Low
Sn to CP
Waveform 3
0
0
0
0
ns
ns
tw(H)
tw(L)
CP Pulse width,
High or Low
Waveform 1
4.0
4.0
4.0
4.0
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.
VM
VM
VM
VM
1/fMAX
tW(L)
CP
I/On
tW(H)
TC
VM
VM
SF01263
tPHL
tPLH
tPLH
tPHL
Waveform 1. Propagation Delay, Clock Input to Output,
Clock Pulse Width, and Maximum Clock Frequency
VM
VM
VM
VM
tPLH
tPHL
CET
TC
SF01264
Waveform 2. Propagation Delay CET Input to
Terminal Count Output
CP
VM
VM
VM
VM
th(L)
th(H)
Sn, I/On,
CET
SF01265
VM
VM
ts(H)
ts(L)
Waveform 3. Data Setup and Hold Times
VM
VM
VM
tPHZ
tPZH
OE
VOH -0.3V
0V
SF01266
I/On
Waveform 4. 3-State Output Enable Time to High Level and
Output Disable Time from High Level
VM
VM
VM
tPLZ
tPZL
VOL +0.3V
3.5V
OE
SF01267
I/On
Waveform 5. 3-State Output Enable Time to Low Level and
Output Disable Time from Low Level



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