LM385BXM-1.2

Overview

The LM385BXM-1.2 is a micropower voltage reference diode manufactured by Texas Instruments, following the acquisition of National Semiconductor. It operates in shunt mode with a nominal output voltage of 1.235 V. The device features a wide operating current range from 15 µA to 20 mA and utilizes bipolar technology. It is housed in an 8-pin SOIC package and supports a commercial temperature range of 0°C to 70°C.

Feature Summary

• Provides stable micropower voltage reference functionality suitable for precision applications
• Operates effectively across a wide dynamic current range from microamps to tens of milliamps
• Designed for low-power consumption in industrial and general electronic circuits

Applications

• Industrial control systems requiring precise voltage regulation
• Battery-powered equipment utilizing low quiescent current references
• Data acquisition systems needing stable analog voltage baselines

Procurement Notes

Verify that the ordering suffix indicates the specific package type and temperature grade required for your design. Confirm RoHS compliance status through official manufacturer documentation, as legacy National Semiconductor parts may have varying environmental certifications depending on the production batch and revision. Ensure the supplier provides valid traceability data.

Selection Notes

Select this component when a compact surface-mount voltage reference is needed for low-power designs. The 8-SOIC package offers space efficiency compared to through-hole alternatives. Consider the 0°C to 70°C operating range to ensure compatibility with commercial environment requirements. Verify that the 15 µA minimum current requirement fits within your circuit's biasing constraints.

Part Context

This part belongs to the LM385 family of adjustable micropower voltage references originally developed by National Semiconductor and now managed by Texas Instruments. The family includes variants with different output voltages and packages, such as the TO-92 and SOT-23 options. The LM385 series is widely recognized for its stability and low power consumption in portable and industrial electronics.

Replacement Considerations

Public confirmed substitute part numbers include LM385M-1.2/NOPB and LM385MX-1.2/NOPB. These equivalents maintain similar electrical characteristics and pin configurations. Verify package compatibility and thermal performance before substitution.