The BL321 is an operational amplifier with a SOT-23-5 (Surface Mounted Device) form factor and is manufactured by Belling. It is RoHS (Restriction of Hazardous Substances) compliant and is designed for use in audio and other signal processing applications. It is a low power consumption, stable, and high precision amplifier, with features such as wide bandwidth, low noise, and good input offset voltage. It also features a rail-to-rail output swing and an output short circuit protection. The BL321 is suitable for use in portable applications and in demanding conditions that require low voltage operation.