RFPIC12F675KT-I/SS

Overview

The rfPIC12F675KT-I/SS is a 20-pin SSOP FLASH-based microcontroller integrating a UHF ASK/FSK transmitter. It features an 8-bit RISC CPU with 35 instructions, 1024 x 14 words of program memory, 128 bytes of EEPROM, and 64 bytes of SRAM. The device operates at DC to 20 MHz with a factory-calibrated internal 4 MHz oscillator. Key peripherals include a 10-bit 4-channel ADC, analog comparator, two timers, and interrupt capabilities. The integrated RF section supports frequencies from 290-350 MHz with output power adjustable in steps from +10 dBm to -12 dBm.

Feature Summary

• Integrated UHF ASK/FSK Transmitter: Supports data rates up to 40 Kbps with crystal frequency multiplied by 32 for transmission.
• High Performance RISC CPU: 35 single-cycle instructions (except branches) with an 8-level deep hardware stack.
• Memory Configuration: 1024 x 14 Flash program memory, 128 x 8 EEPROM data memory, and 64 x 8 SRAM.
• Analog Peripherals: 10-bit Analog-to-Digital Converter with 4 channels and an analog comparator with 16 internal reference levels.

Applications

• Automotive Remote Keyless Entry (RKE) systems
• Tire pressure sensors
• Wireless sensors
• Low power telemetry

Procurement Notes

Verify the 'K' suffix indicates the 290-350 MHz frequency band variant. Confirm the '-I' designation corresponds to the industrial temperature range (-40°C to +85°C). Ensure the 'SSOP' package matches the 20-pin requirement. Check datasheet revision DS70091B for any specific silicon errata or operational notes relevant to this preliminary document version.

Selection Notes

Select this component when a combined MCU and short-range RF transmitter is required for the 290-350 MHz band. The integrated VCO and PLL simplify design compared to discrete solutions. Consider the 20-pin SSOP package constraints and the need for external loop filter components on pin 13. Verify that the 6 I/O pins meet the system interface requirements alongside the dedicated RF pins.

Part Context

The rfPIC12F675 series includes variants differentiated by operating frequency bands. The 'K' suffix specifically denotes the 290-350 MHz band, whereas 'F' covers 380-450 MHz and 'H' covers 850-930 MHz. All variants share the same core architecture, memory map, and peripheral set, differing primarily in the RF oscillator calibration and frequency multiplication factors.

Replacement Considerations

Direct replacements within the same family include rfPIC12F675FT-I/SS (380-450 MHz) and rfPIC12F675HT-I/SS (850-930 MHz), provided the application frequency allows. Standard PIC12F675 devices lack the integrated RF transmitter and are not functionally equivalent for wireless applications.