MCP2122
Infrared Encoder/Decoder
Features
Package Types
• Pinout compatible with HSDL-7000
• Compliant with IrDA® Standard Physical Layer
Specification (version 1.3)
• UART to IrDA Standard Encoder/Decoder
- Interfaces with IrDA Standard Compliant
Transceiver
• Baud Rates:
- Up to IrDA Standard 115.2 Kbaud Operation
• Transmit/Receive Formats (Bit Width) Supported:
- 1.63 µs
• Low-power Mode (2 µA at 1.8V, +125°C)
• Pb-free packaging
PDIP, SOIC
8
7
6
5
MCP2122
1
2
3
4
16XCLK
TX
RX
VSS
VDD
TXIR
RXIR
RESET
Block Diagram
MCP2122
TX
Encode
CMOS Technology
Reset
Logic
RESET
• Low-voltage operation
• Extended temperature range
• Low power consumption
TXIR
Baud Rate
Generator
16XCLK
RX
Decode
RXIR
IrDA Family Selection
Baud Rate
Encoder
/
Decoder
Protocol
Layer
Handler
Clock
Source
Host UART
Baud Rate
Selection
MCP2120 2400 2400 312,500 (1) 312,500 (1)
Yes
No
XTAL
HW/SW
MCP2122 2400 2400 115,200 (1) 115,200 (1)
Yes
No
16XCLK
By 16XCLK
MCP2140 9600
Yes
IrCOMM(3)
XTAL
None - Fixed
MCP2150 9600 9600 115,200 (2) 115,200 (2)
Yes
IrCOMM(3)
XTAL
HW
Host UART easily interfaces to
a PC’s serial port (DTE)
MCP2155 9600 9600 115,200 (2) 115,200 (2)
Yes
IrCOMM(3)
XTAL
HW
Host UART easily interfaces to
a modem’s serial port (DCE)
Device
Host
UART
IR
9600
Comment
Extended Temperature Range
(-40°C to +125°C)
Note 1: The host UART and the IR operate at the same baud rates.
2: The host UART and IR baud rates operate independent of each other.
3: Supports the 9-wire “cooked” service class of the IrCOMM Application Layer Protocol.
© 2007 Microchip Technology Inc.
Preliminary
DS21894C-page 1
