BCM8211 Datasheet, PDF (2/2 Pages) Broadcom Corporation. – 2.488 GBPS SONET/ SDH TRANSCEIVER WITH INTERNAL LOOP TIMING

OVERVIEW
RESETB
CLK16IP
CLK16IN
FIFO
Control
Write
Pointer
OVFB
DI0
Output
Retime
DI15
CKSEL
RTSYNC
REF155EN
REFCKP
REFCKN
DOSQ
RCK16SQ
RDINP0
RDINN0
RDINP1
RDINN1
SELRD1
CLKPMODE
DATPMODE
LOSIB
M
U
Read
X
B
Pointer
F
A
M
U
X
2.488-GHz PLL
B
D
F
Divide-by-16
C
E
M
U
X
E
D
CDR
D
E
A
C
Divide-by-16
LP BKFB
TSEL
LPBKSB
Loop-
back
Logic
Loss Detect
TXDP
TXDN
TXCKP
TXCKN
TCK16OP
TCK16ON
TXLKDT
DO0
DO15
RCK16OP
RCK16ON
RXLKDT
LOSB
The BCM8211 SONET/SDH transceiver is a fully integrated
serialization/deserialization SONET OC-48 and SDH STM-16 (2.488
Gbps) interface device with an integrated Clock Multiplication Unit
(CMU) and an integrated Clock and Data Recovery (CDR) circuit. On-
chip clock synthesis is performed by the high-frequency, low-jitter,
phase-locked loop on the BCM8211 transceiver, allowing the use of a
slower 77.76/155.52 MHz external transmit clock reference.
Dual RX and TX 2.488-Gbps interfaces support dual-fiber ring
architectures. Clock recovery is performed on the device by
synchronizing its on-chip VCO directly to the incoming data stream.
The low-jitter LVPECL/CMOS interface guarantees compliance with
the bit error rate requirements of the Telcordia GR-253-CORE, ANSI,
and ITU-T standards. The BCM8211 is packaged in a 14 x 20 mm, 128-
pin PQFP.
The BCM8211 operates in either single 2.5V or dual 2.5/3.3V
configuration. The core and CML I/O operate at 2.5V and the LVPECL
I/O can operate at either 2.5V or 3.3V.
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®
BROADCOM CORPORATION
16215 Alton Parkway, P.O. Box 57013
Irvine, California 92619-7013
© 2004 by BROADCOM CORPORATION. All rights reserved.
8211-PB06-R
07/02/04
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