MCP2122T-E/SN

Encoders, Decoders, Converters Overview

The MCP2122T-E/SN is an infrared encoder/decoder compliant with the IrDA Standard Physical Layer Specification (version 1.3). It interfaces a host UART to an IR optical transceiver, supporting baud rates up to 115.2 Kbaud determined by a 16XCLK external clock source. The device operates on a single supply voltage ranging from 1.8V to 5.5V and functions within an extended temperature range of -40°C to +125°C. It features a low-power mode consuming 2 µA at 1.8V and includes a pulse-width limiter circuit to minimize system current consumption during transmission.

Encoders, Decoders, Converters Feature Summary

• Pinout compatible with HSDL-7000
• IrDA Standard Physical Layer Specification (version 1.3) compliance
• Low-power mode capability

Encoders, Decoders, Converters Applications

• Data-Logging/Data Exchange
• System Setup
• System Diagnostic Read Out
• Manufacturing Configuration
• Host Controller Firmware Updates

Encoders, Decoders, Converters Procurement Notes

Verify that the ordering suffix 'T' corresponds to tape and reel packaging as indicated in standard Microchip naming conventions. Confirm the 'E' suffix denotes the extended temperature range (-40°C to +125°C). Ensure the 'SN' suffix matches the 8-pin SOIC package type required for the specific PCB layout. Cross-reference the datasheet revision DS21894C for any updates to electrical characteristics or pin definitions before finalizing procurement.

Encoders, Decoders, Converters Selection Notes

Select this component when an IrDA-compliant interface is required between a microcontroller UART and an optical transceiver. The device supports baud rates up to 115.2 Kbaud using an external 16XCLK signal. It is suitable for applications requiring low power consumption, such as portable devices, due to its ability to enter a low-power state via the RESET pin. Ensure the design accommodates the necessary external clock source and decoupling capacitor for stable operation.

Encoders, Decoders, Converters Part Context

The MCP2122 is part of Microchip's family of Infrared Encoder/Decoder devices. It serves as a stand-alone solution for implementing IrDA communication protocols in embedded systems. The device simplifies the integration of wireless infrared connectivity by handling the modulation and demodulation of data signals according to the IrDA standard, eliminating the need for complex discrete component implementations.

Encoders, Decoders, Converters Replacement Considerations

The MCP2120 is a pin-compatible alternative within the same family. While the MCP2122 supports baud rates up to 115.2 Kbaud, the MCP2120 supports higher rates up to 312.5 Kbaud. Both devices share similar functional blocks but differ in maximum speed capabilities. Verify that the target application's baud rate requirements are met by either device before substitution.