dp83840a National Semiconductor Corporation, dp83840a Datasheet - Page 85

• Manufacturer Part Number: dp83840a
• Description: 10/100 Mb/s Ethernet Physical Layer
• Manufacturer: National Semiconductor Corporation

Version A
8.0 Electrical Specifications
8.8 CRM (Clock Recovery Module) Timing
8.8.1 CRM Window Timing
Note 1: The CRM Sampling Window is a measure of the PLL‘s ability to recover data even with a high degree of jitter without error.
8.8.2 CRM Acquisition Time
Parameter
Note: The Clock Generation Module (CGM) must be stable for at least 100 s before the Clock Recovery Module (CRM) can lock to receive data.
Parameter
T1
T1
CRM Sampling Window
CRM Acquisition
RD+/-
RD+/-
SD
Description
Description
(Continued)
PLL Prior to Lock
JITTER
3ns
100 Mb/s
T1
CRM Sampling Point
85
T1
(Note 1)
Notes
PLL Locked
Notes
JITTER
3ns
Min
-1
Min
Typ
Typ
Max
Max
1
250
Units
Units
ns
s