74F779 Philips, 74F779 Datasheet - Page 7

• Manufacturer Part Number: 74F779
• Description: 8-bit bidirectional binary counter 3-State
• Manufacturer: Philips

Philips Semiconductors
AC SETUP REQUIREMENTS
AC WAVEFORMS
For all waveforms, V
The shaded areas indicate when the input is permitted to change for predictable output performance.
1989 Sep 20
SYMBOL
t
t
t
t
t
t
t
t
t
t
t
t
t
t
I/On
s
s
h
h
s
s
h
h
s
s
h
h
w
w
8-bit bidirectional binary counter (3-State)
CP
TC
(H)
(L)
(H)
(L)
(H)
(L)
(H)
(L)
(H)
(L)
(H)
(L)
(H)
(L)
Waveform 1. Propagation Delay, Clock Input to Output,
CET
Clock Pulse Width, and Maximum Clock Frequency
TC
Waveform 2. Propagation Delay CET Input to
t
t
PLH
PHL
V
Setup time, High or Low
I/O
Hold time, High or Low
I/O
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
M
t
n
n
W
(H)
to CP
to CP
M
PARAMETER
Terminal Count Output
= 1.5V.
V
V
V
t
M
PHL
M
M
1/f
MAX
V
t
M
W
(L)
V
t
M
PLH
V
M
t
t
PHL
PLH
TEST CONDITIONS
V
M
SF01264
Waveform 3
Waveform 3
Waveform 3
Waveform 3
Waveform 3
Waveform 3
Waveform 1
V
V
M
M
SF01263
7
MIN
5.0
5.0
1.0
1.0
5.0
5.5
8.0
8.0
4.0
4.0
Sn, I/On,
C
0
0
0
0
Waveform 4. 3-State Output Enable Time to High Level and
CP
Waveform 5. 3-State Output Enable Time to Low Level and
L
I/On
I/On
OE
OE
CET
= 50pF, R
T
amb
V
CC
TYP
= +25 C
= +5V
Waveform 3. Data Setup and Hold Times
Output Disable Time from High Level
Output Disable Time from Low Level
L
V
t
s
= 500
M
(H)
V
MAX
t
PZH
V
M
t
PZL
M
t
V
LIMITS
h
(H)
M
V
M
V
C
V
T
M
M
L
amb
V
MIN
5.0
5.0
1.0
1.0
5.0
6.0
8.5
8.5
4.0
4.0
= 50pF, R
CC
0
0
0
0
= 0 C to +70 C
= +5V
V
t
PHZ
t
M
PLZ
V
M
L
= 500
MAX
10%
t
s
V
Product specification
(L)
M
74F779
V
V
SF01266
t
h
M
V
V
OH
(L)
OL
M
SF01267
-0.3V
+0.3V
UNIT
SF01265
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
0V
3.5V