AT-41511, AT-41533

General Purpose, Low Noise NPN

Silicon Bipolar Transistors

Data Sheet

Description

Avago’s AT-41511 and AT-41533 are general purpose NPN

bipolar transistors that offer excellent high frequency

performance at an economical price. The AT-41533 uses

the 3 lead SOT-23, while the AT-41511 places the same

die in the lower parasitic 4 lead SOT-143. Both packages

are industry standard, and compatible with high volume

surface mount assembly techniques.

The 4 micron emitter-to-emitter pitch of these transistors

yields high performance products that can perform a

multiplicity of tasks. The 14 emitter finger interdigitated

geometry yields an intermediate-sized transistor with easy

to match to impedances, low noise figure, and moderate

power.

Optimized for best performace from a 5 to 8 volt bias

supply, these transistors are also good performers at 2.7

V. Applications include use in wireless systems as an LNA,

gain stage, buffer, oscillator, or active mixer.

An optimum noise match near 50 ohms at 900 MHz makes

thesedevicesparticularlyeasytouseasLNAs.Typicalampli-

fier designs at 900 MHz yield 1 dB noise figures with 15 dB

or more associated gain at a 5 V, 5 mA bias, with good gain

and noise figure obtainable at biases as low as 2 mA.

The AT-415 series bipolar transistors are fabricated using

The die are nitride passivated for surface protection. Ex-

cellent device uniformity, performance and reliability are

produced by the use of ion-implantation, self-alignment

techniques, and gold metalization in the fabrication of

these devices.

Features

x General Purpose NPN Bipolar Transistor

x 900 MHz Performance:

x Characterized for 3, 5, and 8Volt Use

x SOT-23 and SOT-143 SMT Plastic Packages

x Tape-and-Reel Packaging Option Available

x Lead-free

Pin Connections and Package Marking

Notes:

Top View. Package Marking provides orientation and identification.

"x" is the date code.

BASE

EMITTER

EMITTER COLLECTOR

BASE

EMITTER

COLLECTOR

415x

415x

SOT 23 (AT-41533)

SOT 143 (AT-41511)