Datasheet

DS21Q59 Quad E1 Transceiver
68 of 76
26.3 Serial Port
Table 26-C. AC Characteristics—Serial Port (BTS1 = 1, BTS0 = 0)
(V
DD
= 3.3V ±5%, T
A
= 0°C to +70°C for DS21Q59L; V
DD
= 3.3V ±5%, T
A
= -40°C to +85°C for DS21Q59LN.)
(Figure 26-8
)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
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 26-8. Serial Bus Timing (BTS1 = 1, BTS0 = 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.