BCM3419

ADVANCED LOW IF DIRECT CONVERSION CABLE TUNER

Tuner Application Example (Cable Modem)

Single-chip direct conversion silicon tuner completes system
design with Broadcom cable modem

DOCSIS

/EuroDOCSISTM 1.0/1.1/2.0

Supports 64, 256, and 1024 QAM

Input frequency range of 50 MHz through 860 MHz

IF (intermediate frequency) 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

RSSI (Received Strength Signal Indicator) information
provided through I

C bus

Standby mode

40-pin MLF package

Extreme integration level leads to highly cost-effective BOM

Eliminates significant external components:

SAW (Surface Acoustic Wave) IF filters

RSSI measurement components

IF amplifiers

Oscillator components

Package optimization enables low-cost 2-layer system PCB

Minimal in-house RF expertise required

Support for DOCSIS/EuroDOCSIS 2.0 enables one device
solution to be used worldwide

Superior alternative to can tuners

High quality and reliability (no hand tweaking)

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

Cable Modems

Cable Gateways

Voice Cable Modems

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

F E A T U R E S

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