Rainbow Electronics AT77C105A - Manual (Page 8)

8
AT77C105A [Preliminary]
5419A–BIOM–01/05
Switching Performances
The following characteristics are applicable to the operating temperature -40
°C ≤ T ≤ +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 12. 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
SCK
(1) ns
Slave select setup time T
SSSU
I ½ T
SCK
(1) ns
Slave select hold time T
SSHD
I ½ T
SCK
(1) ns
Table 13. 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 14. 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