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34.3 Receive Side AC Characteristics
AC CHARACTERISTICS–RECEIVE SIDE
(0°C to +70°C; V
DD
= 3.3V ± 5% for DS21Q55;
-40°C to +85°C; V
DD
= 3.3V ± 5% for DS21Q55N)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
RCLKO Period t
LP
488 (E1)
648 (T1)
ns
ns
RCLKO Pulse Width t
LH
t
LL
200
200
.5 t
LP
.5 t
LP
ns
ns
1
1
RCLKO Pulse Width t
LH
t
LL
150
150
.5 t
LP
.5 t
LP
ns
ns
2
2
RCLKI Period t
CP
488 (E1)
648 (T1)
ns
RCLKI Pulse Width t
CH
t
CL
20
20
.5 t
CP
.5 t
CP
ns
ns
RSYSCLK Period t
SP
t
SP
t
SP
t
SP
t
SP
648
488
244
122
61
ns
ns
3
4
5
6
7
RSYSCLK Pulse Width t
SH
t
SL
20
20
.5 t
SP
.5 t
SP
ns
ns
RSYNC Setup to RSYSCLK
Falling
t
SU
20 ns
RSYNC Pulse Width t
PW
50 ns
RPOSI/RNEGI Setup to RCLKI
Falling
t
SU
20 ns
RPOSI/RNEGI Hold From RCLKI
Falling
t
HD
20 ns
RSYSCLK, RCLKI Rise and Fall
Times
t
R
, t
F
22 ns
Delay RCLKO to RPOSO,
RNEGO Valid
t
DD
50 ns
Delay RCLK to RSER, RDATA,
RSIG, RLINK Valid
t
D1
50 ns
Delay RCLK to RCHCLK,
RSYNC, RCHBLK, RFSYNC,
RLCLK
t
D2
50 ns
Delay RSYSCLK to RSER, RSIG
Valid
t
D3
22 ns
Delay RSYSCLK to RCHCLK,
RCHBLK, RMSYNC, RSYNC
t
D4
22 ns
See Figures 37-8 to 37-10