Shunt reference for precision bias and comparison circuits
The Texas Instruments LM236D-2-5 is a precision shunt voltage reference delivering a fixed 2.49 V output with ±2% initial tolerance. As a shunt (two-terminal) reference, it behaves like a Zener diode — requiring an external series resistor to set the bias current, which must be sized to keep the cathode current above 400 µA and below the 10 mA output maximum. This topology is well-suited for low-dropout applications where the supply rail can swing above the reference voltage, and for generating a stable reference in comparator or ADC bias networks. The part is rated for the -25°C to 85°C temperature range, covering most commercial and industrial indoor environments but not extended outdoor or automotive under-hood conditions.
Package and mounting
Housed in an 8-SOIC package (3.90 mm body width), the LM236D-2-5 is a surface-mount part intended for reflow assembly. The supplier device package is also 8-SOIC.
Lifecycle and sourcing
The LM236D-2-5 is listed as Active on the lifecycle record, with RoHS3 compliance confirmed. For a BOM freeze, this part carries no LTB risk and can be qualified for production builds without a short-term end-of-life watch.