82P2821BH IDT, Integrated Device Technology Inc, 82P2821BH Datasheet - Page 63

• Manufacturer Part Number: 82P2821BH
• Manufacturer: IDT, Integrated Device Technology Inc

Specifications of 82P2821BH

• Number Of Transceivers: 1
• Screening Level: Industrial
• Mounting: Surface Mount
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Lead Free Status / RoHS Status: Not Compliant

IDT82P2821
21(+1) CHANNEL HIGH-DENSITY T1/E1/J1 LINE INTERFACE UNIT
Recovered clock of one
CLKA input
of the 22 channels
JA_BYPAS = 1 ?
Yes
No
Clock is derived from the
Clock is derived from the output
output of RJA
of Rx Clock & Data Recovery
selected by REFA[4:0]
FS_BYPAS = 1 ?
Yes
No
Pass through a
Frequency Synthesizer
FREE = 1 ?
No
Yes
Output on REFA is free
Output on REFA is locked to
Output the selected clock on
running (locked to MCLK).
the selected clock source.
REFA
The frequency is
The frequency is
programmed in FREQ[2:0] *.
programmed in FREQ[2:0].
Note *: '000' and '011' are reserved for FREQ[2:0] when REFA is free running.
Figure-40 REFA Output Options in Normal Operation
Functional Description
63
February 6, 2009