DTA143XCA-HF

Overview

The DTA143XCA-HF is a PNP digital transistor manufactured by Comchip Technology, designed for surface-mount applications in the SOT-23-3 package. It integrates biasing resistors to simplify circuit design. Key electrical parameters include a maximum collector-emitter voltage (VCEO) of -50 V and a continuous collector current of -100 mA. The device features a typical input resistance (R1) of 1 kOhm and an emitter-base resistance (R2) of 10 kOhm, resulting in a resistor ratio of approximately 10. Power dissipation is rated at 150 mW, with an operating temperature range from -55°C to +150°C.

Feature Summary

• Integrates built-in biasing resistors to eliminate external components and simplify inverter circuit configuration.
• Utilizes epitaxial planar die construction for robust performance within a compact molded plastic case.
• Supports high-temperature operation suitable for demanding automotive and industrial environments.

Applications

• Automotive interface circuits requiring AEC-Q101 compliance.
• Inverter logic gates and switching applications.
• Driver circuits for low-power loads.

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and specific lot traceability upon order placement. Ensure packaging specifications match production requirements, as reel quantities may vary. Cross-reference datasheet revisions to guarantee parameter consistency with existing designs.

Selection Notes

Select this PNP variant when negative logic inversion or high-side switching is required. The integrated 1kOhm input resistor suits standard TTL/CMOS logic levels. Verify that the -50V rating exceeds the maximum circuit voltage. Consider the SOT-23-3 footprint constraints during PCB layout. Compare thermal dissipation limits against expected load currents to prevent overheating.

Part Context

This component belongs to Comchip Technology's line of digital transistors, which combine bipolar junction transistors with internal resistors. The DTA series specifically denotes PNP configurations. These devices replace discrete transistor-resistor networks, reducing board space and assembly costs while maintaining consistent electrical characteristics across production batches.

Replacement Considerations

Complementary NPN types such as DTC143ECA-HF are available for symmetric designs. Verify pinout compatibility and electrical symmetry before substitution. Check if alternative manufacturers offer equivalent R1/R2 ratios and VCEO ratings for direct drop-in replacement.