Renesas BB304CDW-TL-E

Overview

BB304CDW-TL-E from Renesas Electronics is a VHF RF amplifier MOS FET IC with built-in biasing circuit, designed for 200 MHz signal amplification in compact wireless receivers. It delivers 29 dB typical power gain, 1.2 dB typical noise figure, and operates from 5–9 V supply voltage in a CMPAK-4 (SOT-343mod) package.

For engineers reviewing the BB304CDW-TL-E datasheet, BB304CDW-TL-E pinout, BB304CDW-TL-E application, or BB304CDW-TL-E equivalent, key selection criteria include its dual-gate structure for gain/noise optimization, ESD robustness (200 V HBM), and suitability for low-power VHF front-end stages where board space and component count are constrained.

Technical Context

The BB304CDW-TL-E is a dual-gate silicon N-channel MOSFET optimized for VHF amplification up to 1 GHz. Its gate1 controls DC bias and transconductance, while gate2 provides independent RF signal injection-enabling high isolation (S12 < 0.0053 at 200 MHz) and stable gain control without external bias networks.

It features integrated ESD protection diodes on all terminals and uses a thermally efficient CMPAK-4 package with source-connected die pad for channel temperature management up to 150°C. The device is characterized at 25°C with fixed test conditions including RG = 180 kΩ (5 V) or 470 kΩ (9 V) for reproducible operating point setup.

Key Specifications

Pinout & Package

CMPAK-4 (SOT-343mod) surface-mount package with exposed thermal pad (RENESAS code PTSP0004ZA-A); 4-pin configuration optimized for RF layout with minimal parasitic inductance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar VHF RF amplifier applications.

Compared with NE68033 and BF998, BB304CDW-TL-E uniquely combines dual-gate functionality, built-in biasing, and 200 V HBM ESD protection in a miniature 4-pin package-making it optimal for space-constrained, low-voltage, production-ready VHF amplifiers where BOM reduction and assembly reliability are prioritized.

Availability

BB304CDW-TL-E is available at Aetrix Electronics and suitable for FM radio receivers, land-mobile radios, ISM-band sensor transceivers, and portable TV tuners requiring stable component supply and consistent RF performance across production batches.

Supply support for BB304CDW-TL-E includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Renesas Electronics Corporation is a global semiconductor leader specializing in microcontrollers, analog, power, and RF solutions for automotive, industrial, and consumer applications.

BB304CDW-TL-E belongs to Renesas' BBFET family of integrated RF MOSFETs designed specifically for cost-sensitive, space-constrained VHF amplification in consumer and professional wireless equipment.

FAQ

What is the primary function of BB304CDW-TL-E in an RF signal chain?

The BB304CDW-TL-E serves as a low-noise, high-gain VHF amplifier-typically deployed as the first active stage in receiver front-ends. Its dual-gate architecture allows independent control of bias (Gate1) and RF input (Gate2), delivering 29 dB typical power gain and 1.2 dB typical noise figure at 200 MHz while minimizing external component count. This makes BB304CDW-TL-E ideal for compact, battery-efficient RF designs where signal integrity and board space are critical.

Does BB304CDW-TL-E require external biasing components?

No-BB304CDW-TL-E integrates a complete biasing circuit, eliminating the need for external gate resistors or bypass capacitors typically required for discrete dual-gate MOSFETs. Gate1 accepts a DC bias voltage (e.g., 5 V via simple resistor divider), while Gate2 receives the RF signal directly. This built-in biasing reduces component count by at least three parts per stage and improves layout reproducibility, as confirmed in the "Features" section of the Renesas BB304C datasheet (Rev. 6.00).

What package type does BB304CDW-TL-E use, and why is it suitable for RF applications?

BB304CDW-TL-E uses the CMPAK-4 (SOT-343mod) package, designated by Renesas as PTSP0004ZA-A. Its 4-pin configuration places Source (Pin 1) and Drain (Pin 4) on opposite corners to minimize loop inductance, while Gate1 (Pin 2) and Gate2 (Pin 3) are adjacent for controlled RF routing. The exposed source pad enhances thermal conduction and RF grounding-critical for stable 200 MHz operation and 100 mW channel dissipation, as detailed in the "Outline" and "Package Dimensions" sections of the datasheet.

How does BB304CDW-TL-E handle electrostatic discharge (ESD)?

BB304CDW-TL-E incorporates built-in ESD-absorbing diodes on all terminals and is rated for 200 V HBM (Human Body Model) with C = 200 pF and Rs = 0 Ω. This level of on-chip protection eliminates the need for external ESD suppressors in most consumer and industrial applications, simplifying PCB layout and reducing BOM cost. The specification is explicitly stated in the "Features" section of the Renesas BB304C datasheet (Rev. 6.00, page 1).

Can BB304CDW-TL-E operate from a 3.3 V supply?

No-BB304CDW-TL-E is specified for 5–9 V operation only. Absolute maximum ratings limit VDS to 12 V and VG1S to +10 V, while electrical characteristics (e.g., ID(op), PG, NF) are guaranteed only at 5 V or 9 V test conditions. At 3.3 V, drain current drops below functional threshold (ID < 5 mA), resulting in insufficient gain and degraded noise performance. Designers must use a minimum 5 V supply, as confirmed in the "Electrical Characteristics" table (page 2) and "Features" list.