Datasheet

DS2148/DS21Q48
67 of 73
Table 10-3. AC Characteristics—Serial Port (BIS1 = 1, BIS0 = 0)
(V
DD
= 5.0V ±5%, T
A
= -40°C to +85°C.) (See Figure 10-8)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
Setup Time CS to SCLK t
CSS
50 ns
Setup Time SDI to SCLK t
SSS
50 ns
Hold Time SCLK to SDI t
SSH
50 ns
SCLK High/Low Time t
SLH
200 ns
SCLK Rise/Fall Time t
SRF
50 ns
SCLK to CS Inactive t
LSC
50 ns
CS Inactive Time t
CM
250 ns
SCLK to SDO Valid t
SSV
50 ns
SCLK to SDO Tri-state t
SSH
100 ns
CS Inactive to SDO Tri-state t
CSH
100 ns
Figure 10-8. Serial Bus Timing (BIS1 = 1, BIS0 = 0)
SCLK
1
SCLK
2
SDI
CS*
HIGH Z
SDO
t
CSS
t
SSS
t
SSH
t
SRF
t
SLH
t
LSC
t
CM
t
SSV
t
SSH
t
CSH
HIGH Z
LSB
LSB
LSB MSB
MSB
MSB
NOTE 1: OCES =1 AND ICES = 0.
NOTE 2: OCES = 0 AND ICES = 1.