bcm3137 Broadcom Corp., bcm3137 Datasheet

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bcm3137

Manufacturer Part Number
bcm3137
Description
Bcm3137 Universal Burst Receiver
Manufacturer
Broadcom Corp.
Datasheet

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B C M 3 1 3 7
The Broadcom BCM3137 is a headend QPSK/QAM
burst receiver for CMTS applications
DOCSIS/EuroDOCSIS, IEEE 802.14, DAVIC and DVB-
compliant
Programmable Demodulation: QPSK/16 QAM
Variable symbol rates from 100 kBaud up
to 5.12 MBaud
Analog front-end featuring dual gain stages and dual
10-bit ADCs, plus a 6-bit ADC to estimate wideband
channel
Fast burst acquisition: preamble size as small
as 4 bytes
Programmable components include:
Internal burst FIFOs for receive rate de-coupling
Choice of serial data receive interfaces
JTAG Test Interface
100-pin PQFP Package
Flexible symbol demapping: Differential /
Non-Differential
RS decoder block size (N), GF (256), T = 1 to 10
Last RS codeword size: fixed or shortened
23-bit derandomizer: polynomial, seed, type
Derandomizer location: before/after RS decoder
B C M 3 1 3 7
DOCSIS/EuroDOCSIS-compliant Cable Modem Termination System Block Diagram
44 MHz IF
5-65 MHz
U N I V E R S A L B U R S T R E C E I V E R
VGA
F E A T U R E S
®
PA
Tuner
RF
SAW
PRODUCT
PRODUCT
LPF
LPF
CLOCK
CLOCK
BCM3210B
Modulator
BCM3033
QAM
MAC
A high-performance, integrated solution for upstream
demodulation in cable data, video and telephony
applications
Provides full DOCSIS/EuroDOCSIS compliance for
use in Cable Modem Termination Systems (CMTS)
Seamless integration with BCM3210B CMTS Media
Access Controller (MAC)
Applicable to digital CATV reverse-channel receiver
Unprecedented integration of three on-board ADCs
Improved ability to control external VGAs/PLLs
through integrated serial/parallel interface
Extraordinary handling of burst-to-burst variations
in excess of 20 dB
Supports random burst arrival
Improved ability to remove channel impairments
through integration of an adaptive equalizer
Maximum baud rate flexibility with full
programmability from 100 kBaud to 5.12 MBaud
Burst Demod
1-8 Channels
S U M M A R Y
BCM3137
Reduces overall system cost
Increases channel density per card
Simplifies RF frontend design
Enables power estimation of the entire upstream band
BCM3137
Brief
Brief
DATA
DATA
Interface
PCI
O F
100Base-T
Ethernet
Pentium
PC
Backbone
B E N E F I T S
PCI

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bcm3137 Summary of contents

Page 1

... • The Broadcom BCM3137 is a headend QPSK/QAM burst receiver for CMTS applications • DOCSIS/EuroDOCSIS, IEEE 802.14, DAVIC and DVB- compliant • ...

Page 2

... MCNS MAC chip. The BCM3137 prepends ranging and data information to each received code word and packet for processing by the BCM3210B. An ATM UTOPIA-like receive interface is also supported in a bit-serial style. The BCM3137 can be configured through either an SPI C-compatible serial interface. The BCM3137 represents a highly-integrated, mixed-signal = 0 ...

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