STFPC311

Overview

The STFPC311 is an obsolete front panel controller and driver designed for Vacuum Fluorescent Displays (VFD). It integrates a VFD controller with a driver operating on 1/8 to 1/16-duty factors, featuring 12 segment outputs, 8 grid outputs, and 8 shared lines. The device includes display memory, control circuits, key scan capabilities, and an infrared remote control decoder supporting Philips or NEC formats. It accepts serial data via SPI from a microcontroller and supports two general-purpose input switches. The IC manages power supply from 3.3V to -30V and offers low standby power consumption.

Feature Summary

• Integrated infrared remote control decoder module for system activation
• Built-in dimming circuit with adjustable steps for display brightness control
• Auto-increment functionality for display digits to reduce microcontroller load
• P-channel open-drain outputs with internal pull-down resistors eliminating external components

Applications

• DVD players
• VCD players
• Home stereo AV equipment
• POS systems

Procurement Notes

Verify component obsolescence status before design integration. Confirm availability of alternative solutions or last-time buy options through authorized STMicroelectronics distributors. Ensure compatibility with existing vacuum fluorescent display modules regarding voltage levels and interface protocols during replacement planning.

Selection Notes

Select this component only for legacy designs requiring integrated VFD driving and IR decoding in a single package. Evaluate the PQFP-52 package constraints and verify that the specific duty factor requirements align with the 1/8 to 1/16 operational range. Consider the absence of active support due to obsolete status when planning long-term production cycles.

Part Context

This part belongs to STMicroelectronics' discontinued portfolio of front panel control solutions. It was engineered to simplify user interface designs by combining display driving, key scanning, and remote control decoding into one integrated circuit, thereby reducing bill of materials and board space for consumer audio-visual devices.

Replacement Considerations

No public confirmed substitute part numbers are available for this obsolete component. Designers must evaluate discrete driver solutions or newer generation controllers from STMicroelectronics that may require additional external components for equivalent functionality.

FAQ

What remote control protocols does the STFPC311 support?

The device integrates a decoder module compatible with Philips and NEC infrared remote control formats.

How is data communicated between the microcontroller and the STFPC311?

Serial data is input through an SPI interface utilizing STB, DIN, DOUT, and CLK pins.

Does the STFPC311 require external resistors for its driver outputs?

No external resistors are necessary because the P-channel open-drain outputs include built-in pull-down resistors.