AC Waveforms
(1)
Note:
1. Timing measurement reference is 1.5V. Input AC driving levels are 0.0V and 3.0V, unless otherwise specified.
AC Characteristics
(1)
-7
Symbol
t
PD
t
CO
t
CF
t
S
t
H
Parameter
Input or Feedback to
Combinatorial Output
Clock to Output
Clock to Feedback
Input or Feedback Setup Time
Hold Time
External Feedback 1/(t
S
+ t
CO
)
f
MAX
Internal Feedback 1/(t
S
+ t
CF
)
No Feedback 1/(t
WH
+ t
WL
)
t
W
t
EA
t
ER
t
AP
t
AW
t
AR
t
SP
t
SPR
Notes:
1.
2.
3.
4.
Clock Width (t
WL
and t
WH
)
Input or I/O to Output Enable
Input or I/O to Output Disable
Input or I/O to Asynchronous
Reset of Register
Asynchronous Reset Width
Asynchronous Reset
Recovery Time
Setup Time, Synchronous Preset
3.5
0
125
(3)
166
166
3
3
3
3
7
5
4.5
7.5
7.5
10
Min
3
2
Max
7.5
4.5
(2)
2.5
4.5
0
90
142
142
3.5
3
3
3
8
6
6
8
10
9
12
Min
3
2
-10
Max
10
6.5
2.5
10
0
55.5
69
83.3
6
3
3
3
15
10
10
10
15
15
20
10
3
3
3
20
20
14
14
20
20
22
0
38.5
45.5
Min
3
2
-15
Max
15
8
2.5
Min
3
2
-20
Max
20
12
8
14
15
0
33.3
40
38.5
13
3
3
3
25
25
15
15
25
25
25
Min
3
2
-25
Max
25
15
13
Units
ns
ns
ns
ns
ns
MHz
MHz
MHz
ns
ns
ns
ns
ns
ns
ns
ns
Synchronous Preset to
5
Clock Recovery Time
See ordering information for valid part numbers.
5.5 ns for DIP package devices.
111 MHz for DIP package devices.
The shaded devices are obsolete.
4
ATF22V10B
ATMEL [ ATMEL CORPORATION ]
