BCM3421KML

Product Summary

The BCM3421KML is a highly integrated, advanced direct conversion, single-chip silicon tuner. It integrates the global tuning function, including selectivity, and supports 64-QAM, 256-QAM, and 1024-QAM digital cable modem applications. The applications of the BCM3421KML are Cable modems, Cable gateways, Single-tuner set-top boxes, Non-battery voice cable modems. The device is specifically designed for use with Broadcom’s industry-leading single-chip cable modem devices. With a low BOM cost and a proven reference design, the BCM3421KML provides a better alternative to traditional can tuners. The BCM3421KML supports an IF output frequency range of 4 MHz, 4.5 MHz, and 5 MHz, enabling one device to support both DOCSIS and EuroDOCSIS standards.

Parametrics

BCM3421KML benefits: (1)Extreme integration level leads to highly cost-effective BOM; (2)Eliminates significant external components:SAW (Surface Acoustic Wave) IF filters, RSSI measurement components, IF amplifiers, Oscillator components; (3)Package optimization enables low-cost two-layer system PCB; (4)Minimal in-house RF expertise required; (5)Support for DOCSIS/EuroDOCSIS 2.0 enables one device solution to be used worldwide; (6)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; (7)Single supply voltage provides low-cost operation.

Features

BCM3421KML features: (1)Single-chip direct conversion silicon tuner completes system design with Broadcom cable modem or set-top box; (2)DOCSIS/EuroDOCSIS 1.0/1.1/2.0; (3)Supports 64, 256, and 1024 QAM; (4)Input frequency range of 50 MHz through 930 MHz; (5)IF (intermediate frequency) output range of 4 MHz, 4.5 MHz, and 5 MHz; (6)For use in 6-MHz, 7-MHz, and 8-MHz systems; (7)High linearity across entire frequency range; (8)Differential signals for high noise immunity; (9)Integrated and cost-effective BOM: True single-chip tuner, Single 3.3V supply voltage, Fully integrated oscillator, Fully integrated channel selectivity; (10)Symmetrical IF output for direct connection to channel decode; (11)Received Strength Signal Indicator (RSSI) information provided through Broadcom Serial Control (BSC) bus; (12)Standby mode; (13)40-pin MLF package; (14)RoHS-compliant.

Diagrams