MCP2155-I/SO

Controllers Overview

The MCP2155-I/SO is an IrDA standard protocol stack controller manufactured by Microchip Technology, designed for Data Communication Equipment (DCE) applications. It operates within a supply voltage range of 3.0 V to 5.5 V and supports serial baud rates of 9600, 19200, 57600, and 115200 bps via hardware selection on BAUD1:BAUD0 pins. The device handles infrared data communication rates up to 115.2 kbaud, utilizing a 64-byte data packet size with CRC protection. It features an 18-pin SOIC package and functions as a secondary device in point-to-point configurations, requiring an external 11.0592 MHz clock source.

Controllers Feature Summary

• Implements the complete IrDA standard protocol stack including IrLAP, IrLMP, IAS, Tiny TP, and the IrCOMM 9-wire cooked service class.
• Provides physical signal layer support with bi-directional communication and automatic bit encoding/decoding between UART and infrared transceivers.
• Includes hardware flow control signals (RTS, CTS, DSR, DTR, RI, CD) to manage data transmission states and link establishment.
• Supports low-power operation through a dedicated enable pin that disables internal state machines when held low.

Controllers Applications

• Wireless connectivity implementation for embedded systems requiring IrDA compliance.
• Serial port emulation for legacy devices such as printers and modems using IrCOMM protocols.
• Point-to-point data exchange between portable computing devices like PDAs and mobile phones.

Controllers Procurement Notes

Verify the specific ordering suffix against the manufacturer's current datasheet to confirm package type and temperature grade. Ensure the procurement channel provides valid traceability documentation. Confirm that the component meets RoHS requirements if applicable to the target assembly process. Cross-reference the part number with official distributor catalogs to validate authenticity before purchase.

Controllers Selection Notes

Select this component for applications requiring strict adherence to the IrDA standard protocol stack without custom firmware development. Ensure the host microcontroller can interface with the provided UART and hardware flow control signals. Verify that the system design accommodates the required 11.0592 MHz clock source. Consider the half-duplex nature of the IR link when designing application-level timing and buffering strategies.

Controllers Part Context

The MCP2155 belongs to Microchip's family of IrDA protocol controllers, specifically designed to offload protocol handling from the main host processor. It sits between a standard UART and an infrared optical transceiver, simplifying the integration of wireless serial connectivity into embedded designs. This model represents the industrial temperature variant in an SOIC package.

Controllers Replacement Considerations

The MCP2155T-I/SO is the tape-and-reel version of this component, offering identical electrical and functional specifications but differing only in packaging format. No other direct substitutes are documented in the provided source material.