Dual NPN pre-biased — what the integrated resistor network means for your BOM
The ROHM UMH9NTN is a dual NPN pre-biased (digital) transistor in a 6-pin SOT-363 package (UMT6). Each transistor integrates a 10kΩ base resistor (R1) and a 47kΩ emitter-base resistor (R2), so the bias network is already on-chip. That eliminates two external resistors per channel — four components saved versus a discrete transistor pair.
ROHS3 compliant.
SOT-363 footprint — fits tight layouts
The UMT6 package is a 6-pin SOT-363 variant, roughly 2.0mm × 2.1mm. The compact footprint suits multi-layer PCBs in portable devices, sensor modules, and space-constrained control boards. No special thermal management needed at the 150mW power ceiling in typical ambient conditions.