DS2154
(0°C to 70°C; VDD=5V ±=5% for DS2154L;
-40°C to +85°C; VDD=5V ±=5% for DS2154LN)
AC CHARACTERISTICS -
RECEIVE SIDE
PARAMETER
SYMBOL MIN
TYP
488
244
244
244
244
488
MAX
UNITS NOTES
RCLKO Period
tLP
ns
RCLKO Pulse Width
tLH
tLL
tLH
tCL
tCP
tCH
tCL
tSP
200
200
150
150
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
1
1
2
2
RCLKO Pulse Width
RCLKI Period
RCLKI Pulse Width
75
75
RSYSCLK Period
122
122
50
648
488
3
4
tSP
RSYSCLK Pulse Width
tSH
tSL
tSU
tPW
tSU
50
RSYNC Set Up to RSYSCLK Falling
RSYNC Pulse Width
20
tSH-5
50
RPOSI/RNEGI Set Up to RCLKI
Falling
20
RPOSI/RNEGI Hold From RCLKI
Falling
tHD
20
ns
RSYSCLK/RCLKI Rise and Fall Times
tR, tF
tDD
25
50
ns
ns
Delay RCLKO to RPOSO, RNEGO
Valid
Delay RCLK to RSER, RDATA, RSIG,
RLINK Valid
tD1
tD2
50
50
ns
ns
Delay RCLK to RCHCLK, RSYNC,
RCHBLK, RFSYNC, RLCLK
Delay RSYSCLK to RSER, RSIG Valid
tD3
tD4
50
50
ns
ns
Delay RSYSCLK to RCHCLK,
RCHBLK, RMSYNC, RSYNC
See Figures 14-4 to 14-6 for details.
NOTES:
1. Jitter attenuator enabled in the receive path.
2. Jitter attenuator disabled or enabled in the transmit path.
3. RSYSCLK=1.544 MHz.
4. RSYSCLK=2.048 MHz.
78 of 87
DALLAS [ DALLAS SEMICONDUCTOR ]
