Fully-integrated, DOCSIS-compliant PHY/ MAC
integrated circuit

Reduces overall system cost

Simplifies system, board and software design

Reduces power consumption

Single crystal design with direct IF sampling

Complete Media Access Control (MAC) function for
MCNS-compliant cable modem

Ensures interoperability in consumer-grade products.

Baseline privacy encryption and decryption

Support for up to 16 SIDs and 16 56-bit DES
encryption keys with initialization vectors

40-bit DES version available for export

Hardware processing, enabling real-time

Termination of MPEG-2 transmission convergence
sublayer

Generation/verification of CRC and HCS

Extraction and processing of time stamps and system
timing

MAP message handling and upstream bandwidth
requests

MAC layer fragmentation in hardware

Extensive address filtering

BCM3300 QAMLink

SINGLE-CHIP DOCSIS CABLE MODEM

DOCSIS-Compliant External Cable Modem

S U M M A R Y O F B E N E F I T S

PRODUCT

Brief

B C M 3 3 0 0

5-42 MHz

Control

54-860 MHz

SRAM

USB

XCVR

DRAM

BCM5201

10/100BT

XCVR

FLASH

Diplex

Filter

USB

RJ-45

BCM3300

Single-Chip

MCNS/DOCSIS

Cable Modem

Tuner

LPF

SAW

BCM3310

Serial 1,2

USB Ethernet

Integrated QAMLink Receiver

10-bit A/D converter with input AGC amplifier

Variable symbol rate 256 QAM receiver

Digital demodulator, Nyquist filters, tracking loops and
32-tap adaptive decision feedback equalizer

ITU-T J.83 Annex A/B/C compatible FEC

Integrated Upstream Transmitter

Programmable FEC encoder

Pre-equalizer filter

QPSK/16 QAM burst modulator

10-bit D/A converter with output power control

Integrated DOCSIS Media Access Controller (MAC)

DOCSIS version 1.0 and 1.1 compliant

Supports for fragmentation and concatenation

Supports enhanced Quality of Service (QoS) for Voice
over IP (VoIP) applications

Support for 16 destination address and 256 multicast
address filters

Four simultaneous upstream SIDS multiplexed to 16

CPU Interfaces

Motorola MC68360, MPC850 PowerPC

IDT79R3081 MIPS, BCM3310 Communications
Processor

3.3V Operation

256-pin BGA package

B C M 3 3 0 0 F E A T U R E S

Tuner

AGC

36/44

MHz IF

Tuner

Amp

0 - 65

MHz RF

10-bit

D/A

DDS

Amp Control

Tuner Control

10-bit

A/D

Variable

Interpolator

Pre

Equalizer

Upstream

Processor

DES

Encryption

Shared
SRAM

CPU I/F

JTAG IF

Expansion

RAM I/F

MPEG-2 I/F

DES

Decryption

CPU I/F

JTAG

RAM

Acquisition and Tracking Loops

DMA

and

Memory

Interface

MAP

Processor

Message

Processor

Downstream

Processor

Starvue

MCNS
DAVIC

FEC

ITU-T

J.83

Annex A/B

FEC

Phase

Recovery

and

32-tap

DFE

Nyquist

=.25-.50

Variable

Interpolator

Variable

Interpolator

Variable

Interpolator

Nyquist

=.25-.50

Nyquist

=.12-.18

Nyquist

=.12-.18

The Broadcom

BCM3300 combines a 256-QAM receiver, a

4/16-QAM burst transmitter and a complete DOCSIS
compliant MAC integrated into a single chip. The BCM3300
is the world's first and only single chip, DOCSIS version 1.0
and 1.1 compliant solution with extensions for fragmentation
and Quality of Service (QoS).

The receiver directly samples a tuner output, digitally resamples
and demodulates the signal with recovered clock and carrier
timing, filters and equalizes the data, passing soft decisions to an
ITU-T J.83 Annex A/B/C compatible decoder.

The upstream transmitter takes burst or continuous data, provides
FEC encoding and pre-equalization for DOCSIS or
DVB/DAVIC applications, filters and modulates the data stream
and provides a direct 0 - 65 MHz analog output.

The MAC includes baseline privacy encryption and decryption,
transmission convergence sub-layer support, a TDM/TDMA
framer and a scatter/gather DMA interface. The MAC in the
BCM3300 is also the only DOCSIS compliant device that
implements version 1.0 and 1.1 functionality providing extended
functions for fragmentation, concatenation and multiple SIDs,
enabling full support for Quality of Service applications such as
Voice over IP.

The BCM3300 represents the first silicon solution that
integrates the key DOCSIS physical and MAC layer functions
into a single, integrated chip, enabling the the lowest cost
system implementation in the industry

Ordering Information:

BCM3300KTB

B C M 3 3 0 0 O V E R V I E W

Phone: 949-450-8700

FAX: 949-450-8710

Email: info@broadcom.com

Web: www.broadcom.com

Broadcom

, the pulse logo, and Connecting everything

are trademarks of Broadcom Corporation and/or its

subsidiaries in the United States and certain other countries. All other trademarks are the property of their
respective owners.

BROADCOM CORPORATION
16215 Alton Parkway, P.O. Box 57013
Irvine, California 92619-7013

Part Number BCM3300