AT-30533-TR1G

Overview

The Broadcom AT-30533-TR1G is a low-current, high-performance NPN silicon bipolar transistor designed for maximum transition frequency at low voltage. It utilizes a 3-lead SOT-23 surface-mount package and features a 3.2-micron emitter-to-emitter pitch with five-interdigitated fingers to minimize parasitics. The device operates optimally at 2.7 V with a collector current of 1 mA, achieving a typical noise figure of 1.1 dB and an associated gain of 13 dB at 900 MHz. Absolute maximum ratings include a collector-emitter voltage of 5.5 V, a collector-base voltage of 11 V, and a power dissipation of 100 mW.

Feature Summary

• Optimized for high performance in battery-powered wireless applications through low-voltage operation
• Utilizes self-aligned-transistor process technology for extremely fast switching and high gain
• Features nitride passivation for enhanced surface protection and long-term reliability

Applications

• Low Noise Amplifiers (LNA) in 900 MHz, 1.8 GHz, and 2.4 GHz systems
• Gain stages and buffers for battery-operated wireless devices
• Oscillators and active mixers in pager and mobile communication equipment

Procurement Notes

Verify the specific ordering suffix to confirm packaging format. The TR1 designation indicates a 7-inch reel containing 3000 units. Ensure the 'G' suffix is present if lead-free material specifications are required for the assembly process. Confirm that the SOT-23 package dimensions align with the target PCB footprint before finalizing procurement.

Selection Notes

Select this component when circuit design requires minimal noise figures and high gain at very low bias currents. It is specifically suited for designs operating on end-of-life battery voltages around 2.7 V. Engineers should consider the SOT-143 variant if higher thermal or electrical performance is needed, as it houses the same die but offers improved characteristics over the standard SOT-23 package.

Part Context

This component belongs to the Agilent/Broadcom AT-305 series of NPN silicon transistors. It shares the identical internal die structure with the AT-30511 model. The primary distinction between these models lies in the external plastic packaging; the AT-30533 uses the industry-standard SOT-23 form factor, whereas the AT-30511 utilizes the SOT-143 package.

Replacement Considerations

The AT-30511 serves as a direct functional substitute utilizing the same semiconductor die. Designers must account for the physical package difference, transitioning from SOT-23 to SOT-143, which may require PCB layout modifications.