Datasheet

DS21455/DS21458 Quad T1/E1/J1 Transceivers
259 of 269
38.3 Receive Side AC Characteristics
AC CHARACTERISTICS–RECEIVE SIDE
(V
DD
= 3.3V 5%, T
A
= 0C to +70C for DS21455/DS21458;
V
DD
= 3.3V 5%, T
A
= -40C to +85C for DS21455N/DS21458N.) (See Figure 38-8 to Figure 38-12.)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
488
(E1)
ns
RCLKO Period t
LP
648
(T1)
ns
t
LH
200 0.5 t
LP
ns 1
RCLKO Pulse Width
t
LL
200 0.5 t
LP
ns 1
t
LH
150 0.5 t
LP
ns 2
RCLKO Pulse Width
t
LL
150 0.5 t
LP
ns 2
488
(E1)
ns
RCLKI Period t
CP
648
(T1)
t
CH
20 0.5 t
CP
ns
RCLKI Pulse Width
t
CL
20 0.5 t
CP
ns
t
SP
648 ns 3
t
SP
488 ns 4
t
SP
244 5
t
SP
122 6
RSYSCLK Period
t
SP
61 7
t
SH
20 0.5 t
SP
ns
RSYSCLK Pulse Width
t
SL
20 0.5 t
SP
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