L98SI is an octal low side solenoid driver realized in Multipower-BCD technology particularly suited for driving lamps, relays and solenoids in industrial environment. The L98SI DMOS outputs have very low power consumption. Data is transmitted serially to the device using the Serial Peripheral Interface (SPI) protocol. The L98SI features the outputs status monitoring function.
This document describes the L98SI octal low‑side solenoid driver, including its pin layout, absolute maximum ratings, thermal data and detailed electrical characteristics. Functional description, internal block architecture, timing diagrams and fault‑checking procedures are also covered.
The manual includes mechanical dimensions, recommended operating conditions, and specifications such as output current limits, voltage clamping, and SPI interface timing. It is intended for designers and engineers integrating the driver into applications such as solenoids, lamps and relays.
| Nominal load current per output | 500 mA |
|---|---|
| Minimum current limiting per output | 1.05 A |
| Maximum output current (limit) | ≥ 1.05 A |
| Internal Zener clamp voltage | 36 V |
| Thermal resistance (junction‑case) | 1.5 °C/W |
| SPI operating frequency | 2 MHz |
Each output can source up to at least 1.05 A, with a nominal load current of 500 mA.
The SPI bus can operate up to 2 MHz.
Each output has an internal Zener clamp set to about 36 V to limit inductive transients.