DS2250(T)
12 of 18
AC CHARACTERISTICS—EXTERNAL CLOCK DRIVE
(V
CC
= 5V ±5%, T
A
= 0°C to +70°C.)
# PARAMETER SYMBOL MIN MAX UNITS
28 External Clock High Time @ 12 MHz
@ 16 MHz
t
CLKHPW
20
15
ns
ns
29 External Clock Low Time @ 12 MHz
@ 16 MHz
t
CLKLPW
20
15
ns
ns
30 External Clock Rise Time @ 12 MHz
@ 16 MHz
t
CLKR
20
15
ns
ns
31 External Clock Fall Time @ 12 MHz
@ 16 MHz
t
CLKF
20
15
ns
ns
AC CHARACTERISTICS—SERIAL PORT TIMING: MODE 0
(V
CC
= 5V ±5%, T
A
= 0°C to +70°C.)
# PARAMETER SYMBOL MIN MAX UNITS
35 Serial Port Cycle Time t
SPCLK
12t
CLK
µs
36 Output Data Setup to Rising Clock Edge t
DOCH
10t
CLK
-133 ns
37 Output Data Hold after Rising Clock Edge t
CHDO
2t
CLK
-117 ns
38 Clock Rising Edge to Input Data Valid t
CHDV
10t
CLK
-133 ns
39 Input Data Hold after Rising Clock Edge t
CHDIV
0 ns
SERIAL PORT TIMING: MODE 0
