STM86312

Overview

The STM86312 is a vacuum fluorescent display (VFD) controller and driver manufactured by STMicroelectronics. It supports duty cycles ranging from 1/4 to 1/11 and accommodates up to 16 segments across four digits. The device operates within a supply voltage range of 4.5V to 5.5V and functions in temperatures between -40°C and +85°C. It is housed in a 44-pin TQFP package with dimensions of 10x10 mm, designed for surface mount applications.

Feature Summary

• Integrated controller and driver architecture for vacuum fluorescent displays
• Supports variable duty cycles from 1/4 to 1/11
• Handles up to 16 segments per digit with four-digit capacity
• Operates within standard industrial temperature ranges

Applications

• Industrial control panel displays
• Consumer appliance interfaces
• Automotive instrument clusters

Procurement Notes

Verify the specific ordering suffix to confirm package type and tape/reel specifications, as variations exist. Confirm RoHS compliance status if required for your assembly process. Ensure the supplier provides official datasheets matching the exact part number variant to avoid pinout mismatches. Check for active production status to ensure long-term availability.

Selection Notes

Select this component when designing systems requiring direct drive capabilities for VFD panels without external multiplexing logic. Consider the 44-pin footprint for PCB layout constraints. Evaluate the 4.5V to 5.5V supply requirement against your system's power rails. Verify segment count requirements do not exceed the 16-segment limit per digit.

Part Context

This IC belongs to STMicroelectronics' family of dedicated display drivers tailored for vacuum fluorescent technology. It simplifies design by integrating both control logic and high-voltage driving stages. The component replaces discrete solutions that previously required separate microcontrollers and driver transistors, reducing bill of materials and board space.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation. Consult STMicroelectronics directly for cross-reference recommendations or updated product line replacements.