Switching performances – Rainbow Electronics AT77C104B User Manual
Page 7
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AT77C104B
5347B–BIOM–08/04
Switching Performances
The following characteristics are applicable to the operating temperature -40
° C ≤ Ta ≤ +85° C.
Typical conditions are: nominal value; T
amb
= 25
° C; F
SCK
= 12 MHz; duty cycle = 50%; C
LOAD
120 pF in digital output unless
specified otherwise.
Note:
1. T
SCK
= 1/F
CTRL
(clock period)
Note:
All power supplies = +3.3V
Note:
All power supplies = +2.5V
Table 10. Timings
Parameter
Symbol
Test Level
Min
Typ
Max
Unit
Clock frequency acquisition
mode
F
ACQ
IV
8
16
MHz
Clock frequency navigation
mode and chip control
F
CTRL
I
-
0.2
MHz
Duty cycle (clock SCK)
DC
IV
20
50
80
%
Reset setup time
T
RSTSU
I
½ T
ns
Slave select setup time
T
SSSU
I
½ T
ns
Slave select hold time
T
SSHD
I
½ T
ns
Table 11. 3.3V ±10% Power Supply
Parameter
Symbol
Test Level
Min
Typ
Max
Unit
Data in setup time
T
SU
IV
3
ns
Data in hold time
T
H
IV
1
ns
Data out valid
T
V
I
30
ns
Data out disable time from SS
high
T
DIS
IV
3.8
ns
IRQ hold time
T
IRQ
IV
3
µs
Table 12. 2.5V ±5% Power Supply
Parameter
Symbol
Test Level
Min
Typ
Max
Unit
Data in setup time
T
SU
IV
3
ns
Data in hold time
T
H
IV
1
ns
Data out valid
T
V
I
30
ns
Data out disable time from SS
high
T
DIS
IV
3.8
ns
IRQ hold time
T
IRQ
IV
3
µs