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BCM3138 Datasheet

  • BCM3138

  • Dual Universal Advanced PHY Burst Receiver

  • 2頁(yè)

  • ETC

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BCM3138
PRODUCT
Brief
O F
B E N E F I T S
DUAL UNIVERSAL ADVANCED TDMA PHY-LAYER BURST RECEIVER
B C M 3 1 3 8
F E AT U R E S
S U M M A R Y
is a universal headend advanced TDMA
鈥?/div>
The BCM3138QPSK/QAM burst receiver
physical layer
DOCSIS/EuroDOCSIS-based, IEEE 802.14, DAVIC
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and DVB compliant
Programmable demodulation including
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8, 16, 32, 64, 128 and 256 QAM formats BPSK, QPSK,
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Variable symbol rates from 160 Kbaud to 5.12 Mbaud
providing 320 Kbps to 40 Mbps operation
Powerful Reed Solomon FEC decoder
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deinterleave options for impulse/burst with byte
noise mitigation
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Burst acquisition as fast as 16 preamble symbols
On-board
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channel 10-bit analog-to-digital converters for each
Direct sampling
for DOCSIS and EuroDOCSIS
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via 12-bit digitaloption operating at 160 MHz with
input
Presents high-performance, integrated solution for
鈥?/div>
upstreamademodulation in cable over data, video and
telephony applications.
per package enable
鈥?/div>
Two independent burst receivers reducing equipment
high-density equipment designs,
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
LVDS or TTL level interface options
Powerful on-board equalizer provides ingress and
adjacent channel overlap protection
Integrated Fast Fourier Transform (FFT) processor
with variable FFT sizes and programmable window
options
I
2
C or SPI-compatible microcontroller interface
JTAG test interface
208-pin PQFP package
Operates over industrial temperature range (-40 to +85
degrees C)
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Seamless integration with BCM3212
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Media Access Controller (MAC). Advanced CMTS
鈥?/div>
Applies to digital CATV reverse-channel receiver.
High bps/Hz
enables advanced digital
鈥?/div>
services over modulation channels.
narrow RF
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Includes flexible analog front end options.
Use of on-board
鈥?/div>
components. ADCs minimizes external
Direct sampling option via
鈥?/div>
minimizes RF components. external 12-bit ADC
On-board equalizer enables operation of digital
鈥?/div>
services under challenging plant conditions.
On-chip FFT enables spectrum analysis and
鈥?/div>
management of the entire upstream channel.
鈥?/div>
Small footprint enables high-density equipment.
鈥?/div>
鈥?/div>
Deploys advanced
in
functions in harsh environments.
Distributed CMTS Hybrid Fiber Coaxial Fiber Node
floor space requirements.
Based on DOCSIS/EuroDOCSIS standards for use in
Cable Modem Termination Systems (CMTS).
Cable Modem Termination System (CMTS) Block Diagram
5-65 MHz Upstream
BCM3138
Dual Adv. TDMA
Receiver
BCM3138
BCM3138
Ethernet
BCM3212
Advanced
CMTS MAC
PCI Bus
Routing/
Classification
Engine
WAN
System
CPU
44 MHz IF
BCM3034
Advanced QAM
Modulator
PA
LPF
Downstream
SDRAM
(PHS,
output
queues)
Memory

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