TOIM4232-TR3

Encoders, Decoders, Converters Overview

The TOIM4232-TR3 is a SIR Endec integrated interface circuit designed for IrDA applications, manufactured by Vishay Semiconductors. It provides pulse shaping for SIR front-end infrared transceivers, shortening RS232 output signals to IrDA-compatible electrical pulses for transmission and stretching received infrared pulses to proper bit widths. The device operates with a crystal clock of 3.6864 MHz, supporting programmable baud rates from 1200 bit/s to 115.2 kbit/s. It functions within a supply voltage range of 2.7 V to 3.6 V, featuring 5 V tolerant inputs. Typical power consumption is approximately 10 mW in operational state and a few microwatts in standby mode.

Encoders, Decoders, Converters Feature Summary

• Provides pulse shaping functions including shortening and stretching specifically utilized in SIR IrDA applications
• Directly interfaces SIR transceiver series to an RS232 port with programmable baud clock generator
• Features selectable pulse duration options of 3/16 bit time or fixed 1.627 µs
• Includes low operating current characteristics suitable for battery-powered designs

Encoders, Decoders, Converters Applications

• SIR IrDA front-end infrared transceiver pulse shaping
• Interface between SIR transceivers and RS232 ports
• Programming baud rate generation for serial communication

Encoders, Decoders, Converters Procurement Notes

Verify the component matches the specific Vishay Semiconductor Opto Division part number TOIM4232-TR3. Confirm the package type is SO16 and check for lead-free compliance documentation. Ensure the datasheet revision aligns with design requirements. Validate that the ordering suffix TR3 corresponds to the specified reel quantity of 1500 pieces as documented in the parts table.

Encoders, Decoders, Converters Selection Notes

Select this component when designing systems requiring direct interfacing between RS232 logic and SIR infrared transceivers. Consider the 2.7 V to 3.6 V operating voltage range for compatibility with low-voltage logic levels. Evaluate the need for software-programmable baud rates up to 115.2 kbit/s. Assess power consumption constraints, noting the low standby current and operational power usage for portable applications.

Encoders, Decoders, Converters Part Context

The TOIM4232 belongs to the family of SIR Endec integrated interface circuits developed for IrDA applications. It serves as a bridge between standard RS232 communication ports and infrared transceivers, handling the necessary signal encoding and decoding. This role is critical in enabling wireless serial communication in devices adhering to the IrDA physical layer specifications.

Encoders, Decoders, Converters Replacement Considerations

The TOIM5232 is identified as a compatible alternative within the same product family. Both components share similar functionality for SIR IrDA applications. Verify pinout compatibility and electrical specifications before substitution. Ensure the replacement part meets the required package dimensions and operating voltage ranges.