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Microchip Technology RFPIC12F675K-I/SS
- Part No.:
- RFPIC12F675K-I/SS
- Manufacturer:
- Microchip Technology
- Category:
- Application Specific Microcontrollers
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
RFPIC12F675K-I/SS.pdf
- Description:
- IC MCU 1KX14 RF FSK/ASK 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,697
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Product details
Overview
rfPIC12F675K-I/SS from Microchip Technology is a FLASH-based 8-bit RISC microcontroller with integrated UHF ASK/FSK transmitter, operating in the 290–350 MHz band. It features 1024 × 14 words of program memory, 128 bytes of EEPROM, 10-bit ADC with 4 channels, and low-power operation down to 0.1 µA in standby - enabling compact remote keyless entry (RKE) and wireless sensor nodes.
For engineers reviewing the rfPIC12F675K-I/SS datasheet, rfPIC12F675K-I/SS pinout, rfPIC12F675K-I/SS application, or rfPIC12F675K-I/SS equivalent, this page delivers verified technical context, validated pin functions, real-world use cases for automotive and telemetry systems, and two confirmed alternative parts with documented functional differences.
Technical Context
The rfPIC12F675K-I/SS integrates a PICmicro® Mid-Range core with an on-die UHF transmitter subsystem: a crystal oscillator multiplied by 32 drives a phase-locked VCO, supporting ASK/FSK modulation at up to 40 kbps. Its RFEN control enables precise transmit gating, while REFCLK provides a divided-by-4 reference output for external synchronization.
On-chip peripherals include Timer0 (8-bit with prescaler), Timer1 (16-bit with gate control and LP oscillator support), analog comparator with 16 internal reference levels, and GPIO with individual weak pull-ups and interrupt-on-change per pin - all operating across 2.0–5.5 V with industrial temperature range support.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | PICmicro® 8-bit RISC CPU with 35 instructions; all single-cycle except branches |
| Program Memory | 1024 × 14 words FLASH; supports 100,000 write cycles and >40-year data retention |
| Analog Peripherals | 10-bit ADC (4 channels), analog comparator (16 internal reference levels) |
| RF Band & Modulation | 290–350 MHz ASK/FSK; crystal-pulled FSK up to 40 kbps; +10 dBm to −12 dBm output power in 4 steps |
| Power Consumption | 0.1 µA standby; 0.6 µA SLEEP with WDT enabled; 500 µA at 4 MHz INTOSC |
| Operating Voltage | 2.0–5.5 V DC; supports battery-powered designs without regulation overhead |
| Temperature Range | −40°C to +85°C (Industrial grade), qualified for automotive RKE and alarm systems |
Pinout & Package
rfPIC12F675K-I/SS is housed in a 20-pin SSOP (Shrink Small Outline Package) with 0.65 mm pitch, optimized for space-constrained RF modules and PCBs requiring thermal and EMI isolation between digital and RF sections.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD / VSS | Digital power supply / ground | Separate digital rail; decoupling required near VDD pin for stable MCU operation |
| VDDRF / VSSRF (×2) | RF power supply / ground references | Dedicated RF supply pins isolate noise-sensitive transmitter circuitry from digital domain |
| RFXTAL | RF crystal connection | Connects to fundamental-mode quartz crystal; frequency sets transmit band via ×32 multiplication |
| ANT | RF power amplifier output | Direct connection to antenna matching network; requires impedance tuning for 50 Ω system |
| RFEN | Transmitter enable control | Active-high logic signal; gates RF output to minimize quiescent current during idle periods |
| DATAASK / DATAFSK | Modulation data inputs | TTL-level serial data paths; ASK uses amplitude switching, FSK uses crystal pulling for frequency shift |
| REFCLK | Reference clock output | Divided-by-4 output of RFXTAL; used for synchronizing external receivers or baseband logic |
| GP0–GP5 | Configurable I/O pins | Each supports weak pull-up, interrupt-on-change, analog input (AN0–AN3), and direct LED drive capability |
Key Features
| Feature | Design Value |
|---|---|
| Integrated UHF Transmitter | Eliminates discrete RF front-end components: VCO, loop filter, power amp, and crystal oscillator are monolithic |
| In-Circuit Serial Programming™ | Enables field firmware updates via GP0 (ICSPDAT) and GP1 (ICSPCLK) without removing device from PCB |
| Low-Power Wake-Up | 5 µs typical wake-up from SLEEP mode at VDD = 3 V - critical for duty-cycled sensor nodes |
| Regulatory Compliance Support | Designed for FCC Part 15.231 and EN 300 220 compliance; simplifies certification for sub-GHz ISM-band products |
| Flash Endurance & Retention | 100,000 program/erase cycles and >40 years data retention - suitable for long-life embedded deployments |
Applications
| Automotive Remote Keyless Entry (RKE) | Wireless Tire Pressure Monitoring |
|---|---|
|
Use Scenario: Compact fob transmitting encrypted door unlock commands within 10 m range. IC Role / Device Role / Timing Role: Single-chip RKE transmitter handling encoding, timing-critical ASK modulation, and crystal-referenced RF generation. Use Value: Eliminates external RF IC and reduces BOM count by ≥4 components while meeting FCC spectral mask requirements. |
Use Scenario: Battery-powered sensor node mounted inside tire, reporting pressure every 60 seconds. IC Role / Device Role / Timing Role: Low-power MCU managing pressure sensor interface, sleep/wake scheduling, and burst-mode FSK transmission. Use Value: 0.1 µA standby current extends CR2032 battery life beyond 5 years without maintenance. |
| Garage Door Opener Transmitter | Building Access Keypad Transmitter |
|
Use Scenario: Wall-mounted button sending secure rolling-code command to receiver unit. IC Role / Device Role / Timing Role: Secure transmitter executing encryption algorithm, generating ASK-modulated RF burst synchronized to internal 4 MHz oscillator. Use Value: Factory-calibrated ±1% internal oscillator ensures reliable timing for code generation without external crystal. |
Use Scenario: Outdoor keypad transmitting access credential upon button press in commercial building entry system. IC Role / Device Role / Timing Role: Industrial-grade transmitter operating across −40°C to +85°C, driving FSK modulation with crystal-pulled frequency stability. Use Value: Extended temperature qualification and RF output consistency ensure reliable operation in uncontrolled environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar RF microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| rfPIC12F675F-I/SS | Identical architecture and pinout; operates at 380–450 MHz instead of 290–350 MHz | Targets EU 433 MHz ISM band; incompatible with US 315 MHz RKE infrastructure | Select when designing for 433 MHz regulatory domains and compatible antennas/filters |
| rfPIC12F675H-I/SS | Same MCU core and peripherals; RF section tuned for 850–930 MHz band | Suitable for higher-frequency telemetry where smaller antennas and reduced path loss are advantageous | Choose for compact form factor designs requiring shorter antenna lengths and improved urban multipath resilience |
Compared with rfPIC12F675F-I/SS and rfPIC12F675H-I/SS, the rfPIC12F675K-I/SS provides optimal RF performance and regulatory alignment for North American 315 MHz RKE, garage door, and alarm systems - with no software or layout changes needed when migrating within the same package.
Availability
rfPIC12F675K-I/SS is available at Aetrix Electronics and suitable for automotive remote keyless entry, wireless sensor telemetry, and building access systems requiring stable component supply and long-term lifecycle assurance.
Supply support for rfPIC12F675K-I/SS includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Microchip Technology Inc. is a leading provider of microcontroller, mixed-signal, analog, and Flash-IP solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The rfPIC12F675K-I/SS belongs to Microchip's legacy rfPIC® family - designed specifically to integrate RF transmission capability with embedded control in cost-sensitive, battery-operated sub-GHz wireless applications.
FAQ
What is the RF frequency range supported by the rfPIC12F675K-I/SS?
The rfPIC12F675K-I/SS operates in the 290–350 MHz band, optimized for the 315 MHz ISM frequency used in North American automotive RKE and security systems. Its internal PLL multiplies the RF crystal frequency by 32, so a 9.84375 MHz crystal yields 315 MHz output - confirmed in DS70091B Section 9.0 and Table 1-1.
Does the rfPIC12F675K-I/SS require an external crystal for RF operation?
Yes, the rfPIC12F675K-I/SS requires an external fundamental-mode quartz crystal connected to RFXTAL (Pin 5) to generate its RF carrier. The crystal frequency is multiplied by 32 internally; for 315 MHz operation, a 9.84375 MHz crystal is used - as specified in the "UHF ASK/FSK Transmitter" section of DS70091B-page 1.
Can the rfPIC12F675K-I/SS be programmed in-circuit after soldering?
Yes, the rfPIC12F675K-I/SS supports In-Circuit Serial Programming™ (ICSP™) using GP0 (ICSPDAT) and GP1 (ICSPCLK) pins. This allows full programming and debugging without removing the device from the target PCB - a capability explicitly documented in DS70091B-page 1 and Section 12.0.
What is the lowest power state achievable with the rfPIC12F675K-I/SS?
The rfPIC12F675K-I/SS achieves 0.1 µA standby current, verified in DS70091B-page 1 under "Low Power Features." This state disables all clocks and peripherals while retaining RAM contents, making it ideal for ultra-low-duty-cycle wireless sensors powered by coin cells.
How many analog input channels does the rfPIC12F675K-I/SS ADC support?
The rfPIC12F675K-I/SS includes a 10-bit ADC with four analog input channels: AN0 (GP0), AN1 (GP1), AN2 (GP2), and AN3 (GP4), as defined in the "Peripheral Features" list on DS70091B-page 1 and confirmed in Table 1-1 pin descriptions.
RFPIC12F675K-I/SS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- PIC®
- Package/Case:
- 20-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Applications:
- RKE, Security Systems
- Core Processor:
- PIC
- Program Memory Type:
- FLASH (1.75kB)
- Controller Series:
- rfPIC™
- RAM Size:
- 64 x 8
- Interface:
- -
- Number of I/O:
- 6
- Voltage - Supply:
- 2V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SSOP
RFPIC12F675K-I/SS FAQ
1.How can I place an order for RFPIC12F675K-I/SS through Aetrix?
Please submit a Request for Quotation (RFQ) for RFPIC12F675K-I/SS on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for RFPIC12F675K-I/SS reliable?
The price and inventory of RFPIC12F675K-I/SS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RFPIC12F675K-I/SS is usually 5 days.
3.What payment methods are accepted for RFPIC12F675K-I/SS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RFPIC12F675K-I/SS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RFPIC12F675K-I/SS?
RFPIC12F675K-I/SS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RFPIC12F675K-I/SS order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for RFPIC12F675K-I/SS?
For technical support, including RFPIC12F675K-I/SS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RFPIC12F675K-I/SS requirements.
6.How does Aetrix verify that RFPIC12F675K-I/SS is sourced from the original manufacturer or authorized distributors?
All RFPIC12F675K-I/SS products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that RFPIC12F675K-I/SS meets industry standards.
7.What is the process for return or replacement of RFPIC12F675K-I/SS?
All RFPIC12F675K-I/SS units undergo pre-shipment inspection (PSI). If there is an issue with RFPIC12F675K-I/SS, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The RFPIC12F675K-I/SS part is unused and in its original packaging.
Return procedure for RFPIC12F675K-I/SS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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