November 2011:- Microchip Technology Inc. introduced the PIC12LF1840T48A single-chip Microcontroller-Embedded Wireless Transmitter that integrate an eXtreme Low Power (XLP), 8-bit PIC microcontroller with a sub-GHz RF transmitter. It is ideal for space-, power- and cost-constrained applications, such as remote keyless entry fobs for automobiles, garage doors and home security systems, as well as a broad range of other home and building automation systems.

Microcontroller-Wireless Transmitter for Secure Remote Keyless Entry DesignsThe PIC12LF1840T48A Microcontroller has an on-board transmitter. The transmitter is suitable for operation in the 418, 434 and 868 MHz license-free ISM bands. The modulation is On/Off Keying (OOK) or Frequency-Shift Keying (FSK). This document describes the complete implementation of a radio transmitter using the PIC12LF1840T48A.

In addition to being optimized for secure wireless communication, the PIC12LF1840T48A is designed to maximize battery life via an extremely low operating voltage of 1.8V. Furthermore, the XLP microcontroller has extremely low sleep current consumption, and is efficiently integrated with the transmitter to enable fast wake-up and send functionality that takes full advantage of the MCU’s 8 MIPS operation.

The PIC12LF1840T48A’s combination of features in a single, 14-pin TSSOP package makes it ideal for space-, power- and cost-constrained applications. Additionally, the device is optimized to run Microchip’s royalty-free KEELOQ advanced code-hopping technology, a proven security technology used worldwide by leading manufacturers.