AT-30533-BLKG

Overview

The AT-30533-BLKG is a general-purpose, low-noise NPN silicon bipolar transistor housed in a 3-lead SOT-23 surface-mount plastic package. It utilizes Agilent’s 10 GHz fT Self-Aligned-Transistor process with a 3.2-micron emitter-to-emitter pitch and five-interdigitated emitter fingers. The device is optimized for low-voltage operation at 2.7 V, featuring a maximum collector-emitter voltage of 5.5 V and a collector current limit of 8 mA. At 900 MHz with VCE = 2.7 V and IC = 1 mA, it achieves a noise figure of 1.1 dB and an associated gain of 13 dB.

Feature Summary

• Optimized for high performance at low voltages using a self-aligned transistor process
• Designed for battery-powered wireless applications with end-of-life battery characterization
• Features reduced parasitic design and nitride passivation for surface protection

Applications

• Low Noise Amplifier (LNA) in 900 MHz, 1.8 GHz, and 2.4 GHz systems
• Gain stage and buffer circuits
• Oscillator and active mixer implementations
• Pager applications operating at 900 MHz

Procurement Notes

Verify the specific ordering suffix to confirm packaging configuration. The BLKG designation indicates bulk packaging containing 100 units per container. Confirm lead-free status if required by checking for the 'G' suffix in the part number. Ensure compatibility with standard surface mount assembly techniques before procurement.

Selection Notes

Select this component when low current consumption and high gain are required at low supply voltages. The SOT-23 package is suitable for space-constrained designs compared to the 4-lead SOT-143 variant. Consider the 1.1 dB noise figure and 13 dB gain specifications for RF front-end stages requiring moderate power handling and high dynamic range.

Part Context

This component belongs to the AT-305 series of high-performance NPN bipolar transistors. It shares the same die as the AT-30511 but is packaged in the industry-standard 3-lead SOT-23 format. Both variants utilize the same fabrication technology and are designed for similar wireless market applications.

Replacement Considerations

The AT-30511 serves as a functional equivalent with identical electrical characteristics, differing only in the 4-lead SOT-143 package. Verify pinout compatibility during substitution due to the difference in lead count and physical footprint.