Cirrus Logic CS5508 - Manual (Page 9)

5V SWITCHING CHARACTERISTICS
(T A = T MIN to T MAX; VA+, VD+ = 5V ± 10%;
VA- = -5V ± 10%; Input Levels: Logic 0 = 0V, Logic 1 = VD+; C
L = 50 pF.) (Note 2)
Parameter Symbol Min Typ Max Units
SSC Mode (M/SLP = VD+)
Access Time:
CS Low to SDATA out (DRDY = low)
DRDY falling to MSB (CS = low)
t csd1
t dfd
-
- -
2/f clk
2/fclk
3/f clk
ns
ns
SDATA Delay Time: SCLK falling to next SDATA bit t dd1 - 80 250 ns
SCLK Delay Time SDATA MSB bit to SCLK rising t cd1 - 1/f clk - ns
Serial Clock (Out) Pulse Width High
Pulse Width Low
t ph1
t pl1
-
- 1/f clk
1/f clk
-
- ns
ns
Output Float Delay: CS high to output Hi-Z (Note 16)
SCLK rising to SDATA Hi-Z
t fd1
t fd2
-
- -
1/f clk
2/f clk
-
ns
ns
SEC Mode (M/SLP = DGND)
Serial Clock (In)
f sclk 0 - 2.5 MHz
Serial Clock (In) Pulse Width High
Pulse Width Low
t ph2
t pl2
200
200 -
- -
- ns
ns
Access Time: CS Low to data valid (Note 17) t csd2 - 60 200 ns
Maximum Delay time: (Note 18)
SCLK falling to new SDATA bit t dd2 - 150 310 ns
Output Float Delay: CS high to output Hi-Z (Note 16)
SCLK falling to SDATA Hi-Z
t fd3
t fd4
-
- 60
160
150
300 ns
ns
Notes: 16. If CS is returned high before all data bits are output, the SDATA and SCLK outputs will complete the
current data bit and then go to high impedance.
17. If CS is activated asynchronously to DRDY, CS will not be recognized if it occ urs when DRDY is high
for 2 clock cycles. The propagation delay time may be as great as 2 fclk cycles plus 200 ns. To
guarantee proper clocking of SDATA when using asynchronous CS, SCLK(i) should not be taken high
sooner than 2 fclk + 200 ns after CS goes low.
18. SDATA transitions on the falling edge of SCLK. Note that a rising SCLK must occur to enable the
serial port shifting mechanism before falling edges can be recognized.
CS5505/6/7/8
DS59F7 9
CS5505/6/7/8
DS59F7 9