UPC1944T-E1-AZ

Overview

The UPC1944T-E1-AZ is an adjustable precision shunt voltage reference IC manufactured by Renesas Electronics. It operates within a cathode current range of 1 mA to 30 mA and supports output voltages from 2.16 V to 24 V with an initial accuracy of ±2.4%. The device features a maximum series VREF input voltage of 1.29 V and functions reliably across a temperature range of -30°C to +85°C. Packaged in SOT-89-3 (TO-243AA) surface-mount format, it serves as a stable reference for power management applications requiring precise voltage regulation.

Feature Summary

• Adjustable output voltage capability spanning 2.16 V to 24 V
• Precision shunt regulation with ±2.4% initial accuracy
• Surface-mount SOT-89-3 package design for compact integration

Applications

• Voltage reference sources for analog-to-digital converters
• Power supply monitoring circuits
• Battery-operated equipment requiring stable reference voltages

Procurement Notes

Verify the specific suffix E1-AZ against the manufacturer's latest datasheet to confirm pinout compatibility and electrical specifications. Ensure the ordering code matches the required tolerance and temperature grade. Cross-reference the component marking with official Renesas documentation to authenticate the source and prevent counterfeit substitution during procurement.

Selection Notes

Select this component when an adjustable shunt reference is needed with input voltages up to 24 V. The SOT-89-3 package suits space-constrained designs. Verify that the load current requirements fall within the 1 mA to 30 mA operational window. Confirm thermal performance meets system constraints within the -30°C to +85°C ambient range.

Part Context

The UPC1944T-E1-AZ belongs to the UPC1944T series of adjustable precision shunt regulators. This family provides stable reference voltages for various electronic systems. The part integrates bandgap reference technology to maintain accuracy over temperature variations. It complements other Renesas power management integrated circuits in complex board designs.

Replacement Considerations

Check for direct substitutes within the UPC1944T series or compatible shunt references from other manufacturers. Ensure pinout compatibility with the SOT-89-3 footprint. Verify that alternative parts meet the same voltage range and accuracy specifications.