bcm3422 Broadcom Corp., bcm3422 Datasheet

bcm3422

Manufacturer Part Number

bcm3422

Description

1-ghz Low Power Digital Cable Silicon Tuner

Manufacturer

Broadcom Corp.

Datasheet

1.BCM3422.pdf (2 pages)

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Download datasheet (113Kb)

•

Single-chip direct conversion silicon tuner completes system design

with Broadcom cable modem or set-top box.

DOCSIS

Supports 64, 256, and 1024 QAM

Input frequency range of 50 MHz to 1002 MHz

IF output range of 4 MHz, 4.5 MHz, and 5 MHz

For use in 6-MHz, 7-MHz, and 8-MHz systems

High linearity across entire frequency range

Differential signals for high noise immunity

Integrated and cost-effective BOM:

• True single-chip tuner

• Single 3.3V supply voltage

• Fully integrated oscillator

• Fully integrated channel selectivity

Symmetrical IF output for direct connection to channel decoder

Received Signal Strength Indicator (RSSI) information provided

through Broadcom Serial Control (BSC) bus

Standby mode

48-pin MLF package

RoHS compliant

1-GHZ LOW POWER DIGITAL CABLE SILICON TUNER

/ EuroDOCSIS™ 1.0/1.1/2.0/3.0

F E A T U R E S

5 MHz–65 MHz

Diplex

Filter

Cable Modem Using BCM3422

50 MHz–1002 MHz

Silicon Tuner

BCM3422

•

Extreme integration level leads to highly cost-effective BOM

Eliminates significant external components

• Surface Acoustic Wave (SAW) IF filters

• RSSI measurement components

• IF amplifiers

• Oscillator components

Package optimization enables low-cost two-layer system PCB

Minimal in-house RF expertise required

Support for DOCSIS and EuroDOCSIS enables one device solution to

be used worldwide

Superior alternative to can tuners

• High quality and reliability

• Enables lower profile and smaller designs

• Proven reference design for quick time-to-market

• Simplified manufacturing flow

Single supply voltage provides low-cost operation

Low power consumption is ideal for systems that require battery

backup operation

Data and voice cable modems

Battery backup voice modems

Digital cable set-top boxes

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

A P P L I C A T I O N S

DRAM

Cable Modem

Device

Flash

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bcm3422 Summary of contents

Page 1

... Low power consumption is ideal for systems that require battery backup operation • Data and voice cable modems • Battery backup voice modems • Digital cable set-top boxes Cable Modem Using BCM3422 50 MHz–1002 MHz BCM3422 Silicon Tuner DRAM Flash Cable Modem ...

Page 2

... CP_LO VT_LO BCM3422 Block Diagram a low BOM cost and a proven reference design, the BCM3422 provides a better alternative to traditional can tuners. Its low power operation is suited well for applications that require battery backup capability such as VoIP cable modems. The BCM3422’s extended bandwidth to 1 GHz makes it ideal for next-generation cable devices ...

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