5-channel audio tone processor with I²C control
The BD37533FV-E2: The ROHM BD37533FV- is a 5-channel Audio Tone Processor in a 28-LSSOP package, controlled via an I²C serial interface.
The 7V to 9.5V supply window is typical for automotive-grade audio processors that run from a regulated 8V or 9V rail derived from the vehicle's battery bus. Five independent channels allow simultaneous processing of front/rear left/right and a subwoofer or center channel — a common configuration for automotive sound-stage tuning. The I²C control bus lets a host MCU adjust tone curves, volume, and mixing coefficients without additional analog control lines.
The 28-LSSOP body is 5.60 mm wide with a 0.65 mm typical lead pitch — a standard footprint that routes easily on a two-layer board. The supplier device package is designated 28-SSOP-B; the reel format (Tape & Reel) suits automated pick-and-place assembly. No exposed thermal pad, so the primary heat path is through the leads into the PCB copper.