STLED316SMTR

Specialized Overview

The STLED316SMTR is a serial-interfaced LED controller and driver manufactured by STMicroelectronics. It interfaces microprocessors to LED displays via a 3-wire serial bus (CLK, STB, DIN/DOUT). The device drives up to 48 discrete LEDs in an 8-segment/6-digit configuration or functions as a key scanner for an 8x2 matrix. It operates from a 5.0 V supply (±10%) with a minimum of 4.5 V and maximum of 5.5 V. Each segment output supports a load current capability of 40 mA. The unit features 14 outputs, operates within a temperature range of -40°C to +85°C, and utilizes a SOIC-24 package.

Specialized Feature Summary

• Supports 8-step digital dimming for both individual LED segments and overall display brightness control.
• Integrates key scanning functionality for an 8x2 matrix of up to 16 switches.
• Includes built-in power-on reset and soft-start circuits for reliable operation.
• Features inputs with Schmitt triggers to provide superior noise immunity.

Specialized Applications

• Interface between microprocessors and numeric LED displays
• Driving common-anode LED digit configurations
• Key scanning applications for embedded systems

Specialized Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to ensure correct packaging options such as reel, cut tape, or MouseReel. Confirm that the component meets required environmental standards like RoHS compliance before finalizing procurement. Cross-reference the datasheet revision history to ensure compatibility with existing design specifications and regulatory requirements.

Specialized Selection Notes

Select this component when a compact solution is needed to drive common-anode LED displays with minimal external circuitry. It is suitable for designs requiring integrated key scanning capabilities alongside display driving. Ensure the application voltage aligns with the 5.0 V nominal requirement and that the thermal environment stays within the specified operating temperature range for optimal performance.

Specialized Part Context

The STLED316SMTR belongs to the STLED316S series of LED controllers. This series is designed to reduce bill-of-materials costs through high integration, combining display driving and key scanning on a single chip. It serves as a peripheral device to interface displays with single-chip microcomputers, offering ESD protection greater than 4 kV HBM.

Specialized Replacement Considerations

Consult official substitution guides for compatible parts within the STLED316S family. Verify pinout and electrical characteristics before replacing any existing components to ensure functional equivalence without redesigning the host circuit board.

Specialized FAQ

What is the maximum segment current capability?

Each segment output has a load current capability of 40 mA.

How is the output current set?

The maximum segment current is set through a single external resistor.

Can the device scan keys independently of the display?

Yes, it includes key-scanning functionality for an 8x2 matrix which automatically scans up to 16 switches.