STMicroelectronics L98SI013TR

Overview

L98SI013TR from STMicroelectronics is an octal low-side solenoid driver IC in PowerSO-20 package, featuring eight 0.5 Ω (at 1 A, 25°C) DMOS outputs with integrated 36 V clamping, SPI serial interface, and real-time diagnostic feedback for open-circuit and overload detection-designed for industrial solenoid, relay, and lamp control.

For engineers reviewing the L98SI013TR datasheet, L98SI013TR pinout, L98SI013TR application, or L98SI013TR equivalent, this device delivers verified fault-aware serial driving capability with cascading support, precise current limiting (≥1.05 A), and thermal robustness (R_{th j-case} = 1.5 °C/W) in harsh environments.

Technical Context

The L98SI013TR implements a three-block architecture: an 8-bit SPI shift register for serial command ingestion, a parallel latch for output state retention, and eight independent DMOS output stages with per-channel voltage comparators monitoring V_OUT against 1.6–2.0 V fault threshold. Fault detection triggers automatic latch reset only after a 75–250 µs delay post-CE rising edge.

It supports daisy-chained SPI operation via SO/SI pins, with CE-controlled tri-state SO output and synchronous data transfer (f_OP ≤ 2 MHz). Each output provides internal current limiting (≥1.05 A), 36 V clamp protection, and open-load detection via pulldown current when OFF-enabling reliable diagnostics without external components.

Key Specifications

Pinout & Package

Package: PowerSO-20 (thermally enhanced exposed slug, R_{th j-case} = 1.5 °C/W, weight = 1.9 g).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal low-side driver applications.

Compared with TPL9201PWR and ULN2803ADWR, the L98SI013TR uniquely combines full 8-channel SPI controllability, per-output fault diagnostics, and integrated 36 V clamping-making it the only option for new designs requiring compact, intelligent, and robust solenoid control in industrial and automotive settings.

Availability

L98SI013TR is available at Aetrix Electronics and suitable for automotive door lock systems, industrial PLC output modules, commercial HVAC valve control, and medical infusion pump sequencing requiring stable component supply and long-term lifecycle assurance.

Supply support for L98SI013TR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, MCU, power, and sensor solutions for industrial, automotive, and consumer markets.

The L98SI series belongs to ST's industrial power driver product line, engineered specifically for high-reliability, fault-aware control of inductive loads-including solenoids, relays, and lamps-in harsh temperature and EMI environments.

FAQ

What is the maximum continuous current per channel, and how is it enforced?

Each output supports ≥1.05 A continuous current, enforced by analog current-limiting circuitry within the DMOS stage-not software or external sensing. This limit is guaranteed across –40°C to 125°C ambient and remains active even during fault conditions, preventing thermal runaway without microcontroller intervention.

How does the diagnostic feedback work, and what faults can it detect?

The SO pin returns 8-bit diagnostic data synchronized with SI input: a '1' bit indicates V_OUT > 1.8 V on the corresponding channel. This detects open-circuit (OFF output floating high) and overload/short-circuit (ON output failing to saturate). No external components are needed-the comparators and pulldown current are fully integrated.

Can multiple L98SI013TR devices be connected in series on one SPI bus?

Yes-by connecting SO of one device to SI of the next and sharing SCLK/CE, up to N devices can be daisy-chained. The master MCU clocks out N × 8 bits to program all outputs and clocks in N × 8 bits to read full diagnostic status, preserving deterministic timing and eliminating address decoding logic.

Is the PowerSO-20 package RoHS-compliant and lead-free?

Yes-L98SI013TR uses a RoHS-compliant, lead-free PowerSO-20 package with matte tin plating on leads and an exposed copper slug. The device meets JEDEC J-STD-020 moisture sensitivity level MSL3 and supports standard Pb-free reflow profiles (peak 260°C).