MCP2155-I/SS

Controllers Overview

The MCP2155-I/SS is an IrDA standard protocol stack controller designed for Data Communication Equipment (DCE) applications. It operates within the industrial temperature range of -40°C to +85°C and utilizes a 20-pin SSOP package. The device supports serial communication baud rates of 9600, 19200, 57600, and 115200 bps, while infrared data rates extend up to 115.2 kbps. It features a 64-byte data packet size and requires an 11.0592 MHz clock source. Power consumption is typically less than 1 mA at 3.3V.

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 hardware bit encoding and decoding functionality to interface directly with industry-standard UARTs and infrared transceivers.
• Supports bidirectional half-duplex communication with CRC implementation for data integrity protection.
• Includes programmable device ID string capabilities and hardware-selectable serial baud rate configuration.

Controllers Applications

• Implementing wireless connectivity in embedded systems requiring IrDA standard compliance.
• Serial port emulation for legacy COM applications such as printers and modem devices.
• Point-to-point data connections between portable computing devices like PDAs and cell phones.

Controllers Procurement Notes

Verify that the ordering suffix matches the required package type, as the MCP2155 is available in multiple formats including DIP, SOIC, and SSOP. Confirm the temperature grade corresponds to the specific application environment requirements. Ensure the selected variant aligns with the intended DCE role in the network topology. Cross-reference the datasheet revision to confirm pinout compatibility before finalizing procurement orders.

Controllers Selection Notes

Select this component when implementing IrDA connectivity for DCE applications requiring support for the IrCOMM 9-wire cooked service class. It is suitable for designs needing hardware offloading of the protocol stack and physical layer encoding. Consider the 18-pin or 20-pin package options based on board space constraints. Ensure the host system provides the necessary 11.0592 MHz clock signal via crystal or external input.

Controllers Part Context

The MCP2155 belongs to Microchip's family of IrDA protocol controllers, specifically designed to simplify wireless serial communication integration. It serves as a bridge between a host UART and an optical transceiver, handling complex protocol states internally. This allows designers to add standardized infrared connectivity without extensive firmware development for link management and physical signaling layers.

Controllers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Designers should verify pinout and electrical specifications if considering alternative IrDA controllers from other manufacturers. Ensure any replacement supports the same IrCOMM service class and baud rate configurations.

Controllers FAQ

Does the MCP2155 support multi-point applications?

No, the MCP2155 is designed exclusively for point-to-point applications involving one Primary device and one Secondary device.

What is the function of the EN pin?

The EN pin controls the device enable state. Holding it low places the device in a low-power mode, while bringing it high returns it to operating mode after a delay.

Which IrDA protocols are implemented by the MCP2155?

It implements the Physical Signaling Layer (PHY), IrLAP, IrLMP, IAS, Tiny TP, and the IrCOMM 9-wire cooked service class.