Supply voltage and quiescent current — design margin for rail selection
The 2 V to 30 V single-supply range covers common industrial rails. The 2 mA maximum quiescent current (all four comparators) is moderate. The 0.1 µA maximum input bias current at 5 V suits high-impedance sources.
Input offset and output flexibility — threshold accuracy and logic interface
Maximum input offset voltage is 2 mV at 30 V supply. The open-collector outputs allow wired-OR connections and level translation. CMOS/MOS and TTL output compatibility means no extra level-shifter for mixed-voltage boards.
Package and mounting — 14-SOIC footprint for automated assembly
The 14-SOIC (0.154", 3.90 mm width) package is a standard surface-mount footprint shared by many quad op-amps and comparators. The supplier device package is also 14-SOIC, so the PCB land pattern is consistent across the TI/ST/ADI equivalents.
Lifecycle and compliance — active, no obsolescence risk
The LM139AD is listed as Active with ROHS3 compliance. This part is suitable for new designs and long-life production BOMs without near-term supply risk. The active status means standard lead times apply through the distribution channel; no premium or broker sourcing is required for normal procurement.