This document describes the BU2098F, BU2090F, and BU2090FS series serial-in/parallel-out drivers. These drivers feature direct LED driving, 8/12-bit parallel output, and low voltage operation.
The ROHM BU2098F, BU2090F and BU2090FS are serial‑in/parallel‑out drivers with open‑drain outputs, capable of driving up to 12 LEDs via a 2‑line interface. They provide a maximum output current of 25 mA per channel and are compatible with low‑voltage systems and I²C‑bus devices.
The document details electrical characteristics, pin assignments, timing diagrams, package options (SOP16 and SSOP‑A16), and ordering information. It also includes operating limits such as supply voltage range (+2.7 V to +5.5 V) and temperature range (‑40 °C to +85 °C).
| Maximum output current | 25 mA |
|---|---|
| Number of output lines | 8 (BU2098F) / 12 (BU2090F, BU2090FS) |
| Package type | SOP16 (BU2098F) / SSOP‑A16 (BU2090F, BU2090FS) |
| Supply voltage range | +2.7 V to +5.5 V |
| Operating temperature range | -40 °C to +85 °C |
| Storage temperature range | -55 °C to +125 °C |
| Power dissipation (Pdi) | 300 mW (BU2098F) / 500 mW (BU2090F) / 500 mW (BU2090FS) |
The drivers can source up to 25 mA per output.
They are rated for operation from –40 °C to +85 °C.
BU2098F is offered in SOP16, while BU2090F and BU2090FS are available in SSOP‑A16.
The devices operate with a supply voltage between +2.7 V and +5.5 V.