RN1964TE85LF

Overview

The RN1964 is a Bias Resistor Built-in Transistor (BRT) manufactured by Toshiba Semiconductor and Storage. It integrates an NPN epitaxial planar transistor with a monolithic bias resistor network in a single surface-mount package. The device operates as a switching or inverting circuit element, eliminating the need for external discrete resistors. This integration reduces component count and board space while maintaining consistent electrical characteristics across production batches.

Feature Summary

• Integrated NPN transistor with built-in base and emitter bias resistors
• Monolithic construction ensures stable DC current gain and low saturation voltage
• Simplified circuit design through reduced external component requirements
• Suitable for high-density mounting applications

Applications

• Switching circuits for digital logic interfaces
• Inverter circuits in microcontroller input stages
• Driver circuits for low-power loads
• Level shifting between different voltage domains

Procurement Notes

Verify the exact suffix against the manufacturer's official datasheet to confirm pinout compatibility and resistance values. Confirm RoHS compliance status and moisture sensitivity level prior to ordering. Check for obsolescence notices as this component type may have been superseded by newer series with improved thermal performance or smaller footprints.

Selection Notes

Select based on required collector current, base-emitter voltage threshold, and specific internal resistor ratios. Ensure the package type matches the PCB footprint constraints. Verify that the integrated resistance values provide adequate base drive for the intended load without exceeding maximum power dissipation ratings under worst-case operating conditions.

Part Context

The RN1964 belongs to Toshiba's BRT family of pre-biased transistors. These devices are designed to replace multiple discrete components with a single integrated solution. The TE85L suffix typically denotes a tape-and-reel packaging format suitable for automated assembly processes, distinguishing it from cut-tape or tray variants.

Replacement Considerations

Direct replacements include other Toshiba BRT models with matching NPN polarity and similar resistance ratios, such as the RN1973 series. Cross-manufacturer equivalents should be evaluated for pin compatibility and electrical parameter overlap, particularly hFE and Vce(sat), to ensure functional interchangeability.