鈥?/div>
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 (鈥?0擄 to
+85擄C)
telephony applications.
Two independent burst receivers per package enable
high-density equipment designs, reducing equipment
board space requirements.
Based on DOCSIS 2.0 standards for use in cable
modem termination systems (CMTS).
Seamless integration with BCM3214 advanced CMTS
DOCSIS 2.0 media access controller (MAC).
Applies to digital CATV reverse-channel receiver.
High bps/Hz modulation enables advanced digital
services over narrow RF channels.
Includes flexible analog front end options.
Use of on-board ADCs minimizes external components.
Direct sampling option via external 12-bit ADC
minimizes RF components.
On-board equalizer enables operation of digital
services under challenging plant conditions.
On-chip FFT enables spectrum analysis and
management of the entire upstream channel.
Small footprint enables high-density equipment.
Deploys advanced functions in harsh environments.
Distributed CMTS in hybrid fiber coaxial fiber node.
Cable Modem Termination System (CMTS) Block Diagram
5-65 MHz Upstream
BCM3140
Dual Adv. TDMA/
SCDMA Receiver
BCM3140
BCM3140
Ethernet
BCM3214
DOCSIS 2.0
CMTS MAC
PCI Bus
Routing/
Classification
Engine
WAN
System
CPU
44 MHz IF
BCM3040
Advanced QAM
Modulator
PA
LPF
Downstream
SDRAM
(PHS,
output
queues)
Memory
1
2
