This part is a kind of semiconductor called BB304C.

Function of this product has Build in Biasing Circuit MOS FET IC UHF RF Amplifier.

Manufacturers : Hitachi

Image and pinout :

Some of the text within the PDF file :

BB304C Build in Biasing Circuit MOS FET IC UHF/VHF RF Amplifier ADE-208-606C (Z) 4th. Edition August 1998 Features • Build in Biasing Circuit; To reduce using parts cost & PC board space. • High gain; (PG = 29 dB typ. at f = 200 MHz) • Low noise characteristics; (NF = 1.2 dB typ. at f = 200 MHz) • Wide supply voltage range; Applicable with 5V to 9V supply voltage. • Withstanding to ESD; Build in ESD absorbing diode. Withstand up to 200V at C=200pF, Rs=0 conditions. • Provide mini mold packages; CMPAK-4(SOT-343mod) Outline CMPAK-4 2 3 1 4 1. Source 2. Gate1 3. Gate2 4. Drain Notes: 1 Marking is “DW–”. 2. BB304C is individual type number of HITACHI BBFET. BB304C Absolute Maximum Ratings (Ta = 25°C) Item Drain to source voltage Gate1 to source voltage Gate2 to source [ ... ]

BB304C PDF Datasheet Download