PIC12HV609-I/MF - 8-Pin 1.75KB Flash 8-Bit MCU | Microchip
MPN: PIC12HV609-I/MF ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.86 | $0.86 |
| 10 | $0.78 | $7.80 |
| 100 | $0.66 | $66.00 |
| 500 | $0.58 | $290.00 |
| 1,000 | $0.49 | $490.00 |
PIC12HV609-I/MF Overview
An 8-bit PIC microcontroller (MCU) is a small, low-power computer-on-a-chip that integrates a CPU core, Flash program memory, RAM, peripherals, and I/O on a single die. The PIC12HV609 belongs to Microchip's PIC12F family of 8-pin microcontrollers, sitting in the broader taxonomy: PIC12F -> PIC10/12/16/18 family -> 8-bit MCU -> microcontroller -> embedded processor -> semiconductor. The HV variant adds an internal shunt regulator suitable for direct connection to higher-voltage supplies such as 12 V or 24 V industrial rails without an external regulator.
Key features include 1.75 KB Flash program memory (1K x 14 words), 64 bytes data RAM, hardware multiply, six I/O with individual direction control, one 8-bit timer (TMR0) and one 16-bit timer (TMR1), an enhanced capture/compare/PWM (ECCP) module, an analog comparator, and a 4-channel 10-bit Analog-to-Digital Converter (ADC). The internal 8 MHz oscillator with PLL can be configured for 4 MHz or 8 MHz operation, eliminating the need for external crystals in cost-sensitive designs.
The PIC12HV609-I/MF uses a RISC architecture with 35 single-cycle instructions (excluding branches), a 14-bit instruction word, and a 2-stage pipeline for deterministic execution. The HV shunt regulator block enables direct connection to 2.0 V - 5.5 V sources and supports high-voltage input via external shunt components for fan-control and appliance applications.
Typical applications include small fan-speed controllers, DC-DC converter housekeeping, LED lighting control, battery chargers, smoke detectors, and general-purpose 8-bit embedded control in industrial and consumer products. The 8-VDFN package suits space-constrained surface-mount designs.
When designing with this device, ensure the exposed thermal pad on the 8-VDFN package is soldered to the PCB ground plane for proper thermal dissipation. The HV input pin requires external shunt resistor selection per Microchip application note AN1031 to set the regulated rail voltage.
This page synthesizes distributor pricing from DigiKey, Mouser, and LCSC, drop-in alternatives within the Microchip PIC12F family, and practical design notes not aggregated in any single source.
Drop-in alternatives for PIC12HV609-I/MF — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with PIC12HV609-I/MF (same form factor and footprint) — differing in Internal Oscillator, ADC, Instruction Set, Package, Program Memory Size.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC12HV609T-I/MF
✅ Drop-In✓ In Stock
$0.68 / Unit
View Datasheet →PIC12HV609-I/P
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$0.74 / Unit
View Datasheet →PIC12HV609-E/MF
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
PIC12HV609T-I/MD
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$0.68 / Unit
View Datasheet →PIC12F609-I/MF
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$0.59 / Unit
View Datasheet →PIC12F615-I/MF
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$1.32 / Unit
View Datasheet →PIC12HV609-I/MF Maximum Ratings & Electrical Characteristics
| Program Memory Size | 1.75 KB (1K x 14 words) |
| Data RAM Size | 64 x 8 bytes |
| Data EEPROM | None |
| CPU Architecture | 8-bit PIC RISC |
| Instruction Set | 35 single-cycle instructions, 14-bit word |
| Maximum Operating Frequency | 20 MHz |
| Internal Oscillator | 4 MHz / 8 MHz factory calibrated |
| Number of I/O Pins | 5 (or 6 depending on variant) |
| ADC | 10-bit, up to 4 channels |
| Timers | TMR0 (8-bit), TMR1 (16-bit) |
| Enhanced CCP Module | Yes (1 ECCP + 1 CCP) |
| Analog Comparator | Yes (1) |
| Operating Voltage Range | 2.0 V to 5.5 V |
| High-Voltage Shunt Support | Yes (external shunt resistor) |
| Package | 8-VDFN Exposed Pad (DFN-8) |
| Mounting Type | Surface Mount |
| Operating Temperature Range | -40 C to +85 C (Industrial) |
| RoHS Status | Compliant |
| Lead-Free | Yes |
PIC12HV609-I/MF Pin Configuration
| Pin 1 | VDD — Positive supply voltage (2.0 V to 5.5 V) |
| Pin 2 | GP5/T1CKI/OSC1/CLKIN — GPIO 5 / Timer1 clock input / oscillator input |
| Pin 3 | GP4/AN3/T1G/OSC2/CLKOUT — GPIO 4 / ADC channel 3 / Timer1 gate / oscillator output |
| Pin 4 | GP3/MCLR/VPP — GPIO 3 / Master Clear reset / programming voltage |
| Pin 5 | GP2/AN2/T0CKI/INT/COUT/CCP1 — GPIO 2 / ADC ch2 / TMR0 clock / external interrupt / comparator out / CCP1 output |
| Pin 6 | GP1/AN1/CIN-/VREF/ICSPCLK — GPIO 1 / ADC ch1 / comparator in- / voltage reference / ICD clock |
| Pin 7 | GP0/AN0/CIN+/ICSPDAT/ULPWU — GPIO 0 / ADC ch0 / comparator in+ / ICD data / ultra-low-power wake-up |
| Pin 8 | VSS — Ground reference |
Typical Applications
PIC12HV609-I/MF is suitable for 8 applications: Fan-Speed Controller (Brushless DC), LED Lighting Controller / Dimmable Driver, Battery Charger (Lead-Acid / Li-Ion), Smoke Detector / Fire-Alarm Sensor, Industrial Sensor Conditioning / 4-20 mA Loop, Small Appliance / Coffee Machine Controller, Automotive Accessory / 12 V Auxiliary Controller, DC-DC Converter Housekeeping / Supervisor.
Fan-Speed Controller (Brushless DC)
The PIC12HV609-I/MF is Microchip's canonical 8-bit MCU for small brushless-DC fan-speed controllers because its integrated HV shunt regulator block can connect directly to a 12 V or 24 V motor rail via a single external shunt resistor, eliminating an external LDO. The 4-channel 10-bit ADC reads the back-EMF or tachometer feedback, while the ECCP module generates the PWM gate drive for the FET bridge. With 20 MHz CPU clock and 1.75 KB Flash, the firmware can implement closed-loop PID with start-up ramp and stall detection. Operating from -40 C to +85 C, it suits small box-fan and server-fan designs where 8-VDFN footprint matters.
Recommended
LED Lighting Controller / Dimmable Driver
The PIC12HV609-I/MF integrates an ADC and ECCP PWM that drive a dimmable LED driver stage while the HV shunt block accepts the rectified mains or high-voltage DC bus. The 8-bit core runs PWM dimming at frequencies above audible band (above 20 kHz) with 10-bit duty resolution for flicker-free dimming. Its 64-byte RAM fits state-machine control loops for thermal-foldback and soft-start. The 8-VDFN package enables ultra-compass-sized LED bulb designs. Industrial temp range allows outdoor and appliance-grade luminaires.
Recommended
Battery Charger (Lead-Acid / Li-Ion)
The PIC12HV609-I/MF HV shunt regulator can interface directly with a 12 V adapter input without external regulation, making it ideal for low-cost single-cell Li-Ion or small sealed-lead-acid charger designs. The 10-bit ADC measures battery voltage and charge current with adequate resolution for CC/CV profiles; the ECCP module drives a switching FET at fixed frequency. The 1.75 KB Flash supports temperature-compensated charge algorithms, while the analog comparator enables over-current protection in hardware. Industrial temperature rating suits garage, garden, and automotive-cube environments.
Recommended
Smoke Detector / Fire-Alarm Sensor
The PIC12HV609-I/MF's low-power operation, integrated HV shunt, and 1.75 KB Flash fit ionization- or photoelectric-smoke-detector designs where the MCU is powered from a 9 V or 12 V backup battery through the shunt regulator. The analog comparator provides low-latency photoelectric chamber signal conditioning, while the ECCP drives the piezo horn alarm at high SPL. The wide 2.0-5.5 V supply range and -40 C to +85 C industrial temperature allow UL-listed smoke-alarm designs. The 8-VDFN package keeps the PCB small enough to fit inside standard detector housings.
Recommended
Industrial Sensor Conditioning / 4-20 mA Loop
The PIC12HV609-I/MF HV shunt input can be powered directly from a 24 V industrial loop, while its 10-bit ADC and ECCP drive the 4-20 mA current loop output via a PWM-filtered op-amp stage. The 64-byte RAM and 1.75 KB Flash fit HART or simple Modbus framing for sensor conditioning. Operating from -40 C to +85 C, it handles factory-floor temperature swings. The 8-VDFN (3x3 mm) package enables very compact loop-powered transmitter designs.
Recommended
Small Appliance / Coffee Machine Controller
The PIC12HV609-I/MF integrates HV shunt regulation for direct 12 V appliance-rail connection plus all peripherals for temperature sensing, pump control, and user-interface button scanning. Its 10-bit ADC reads NTC thermistor for boiler temperature with adequate resolution for PID brewing control, and the ECCP drives a triac or SSR for the heater element. The 1.75 KB Flash fits brew-profile firmware with keep-warm and pre-infusion timing. The 8-VDFN exposed-pad package provides thermal dissipation for the small appliance enclosure.
Recommended
Automotive Accessory / 12 V Auxiliary Controller
The PIC12HV609-I/MF operates directly from a 12 V automotive accessory rail through its HV shunt regulator, supporting applications such as interior lighting controllers, USB charger housekeeping, and small accessory switches. The 10-bit ADC reads automotive battery voltage for brown-out detection, and the ECCP drives MOSFETs for LED string control. Note: automotive-grade qualification is not in the standard -I variant; for AEC-Q100 requirements, choose the automotive-grade variant or an external regulator. The -40 C to +85 C temperature range covers cabin environments.
Recommended
DC-DC Converter Housekeeping / Supervisor
The PIC12HV609-I/MF supervises a DC-DC converter by reading output voltage via its 10-bit ADC and adjusting the feedback node or generating a sync signal via ECCP. The HV shunt regulator powers the PIC directly from the converter input rail (e.g., 24 V or 48 V), eliminating an external LDO. The integrated timers manage soft-start and over-current latch-off. The 8-VDFN package and small Flash footprint are well-suited to compact isolated or non-isolated DC-DC modules where a digital supervisor adds value at low BOM cost.
Recommended
Recommended Products Summary
Engineering reference data for PIC12HV609-I/MF — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC12HV609T-I/MF | PIC12HV609-I/P | PIC12HV609-E/MF | PIC12F609-I/MF | PIC12F615-I/MF |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 8-VDFN Exposed Pad (DFN-8) | 8-VDFN Exposed Pad (DFN-8) - same | PDIP-8 - through-hole variant | 8-VDFN Exposed Pad (DFN-8) - same | 8-VDFN Exposed Pad (DFN-8) - same | 8-VDFN Exposed Pad (DFN-8) - same |
| Flash Program Memory | 1.75 KB (1K x 14) | 1.75 KB | 1.75 KB | 1.75 KB | 1.75 KB | 2 KB |
| Data RAM | 64 bytes | 64 bytes | 64 bytes | 64 bytes | 64 bytes | 128 bytes |
| Maximum CPU Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| HV Shunt Regulator | Yes | Yes | Yes | Yes | No (non-HV variant) | No (non-HV variant) |
| ADC Channels | 4 x 10-bit | 4 x 10-bit | 4 x 10-bit | 4 x 10-bit | 4 x 10-bit | 4 x 10-bit |
| ECCP Module | Yes (1 ECCP + 1 CCP) | Yes (same) | Yes (same) | Yes (same) | Yes (same) | Yes (same) |
| Operating Temperature | -40 C to +85 C (Industrial) | -40 C to +85 C | -40 C to +85 C | -40 C to +125 C (Extended) | -40 C to +85 C | -40 C to +85 C |
| Operating Voltage | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V |
Key Differentiators
- Integrated HV shunt regulator block eliminates external LDO (vs PIC12F609-I/MF)
- Smaller DFN-8 package option for space-constrained designs (vs PIC12HV609-I/P (PDIP-8))
- Industrial temperature range as standard variant (vs PIC12F615-I/MF)
Design Notes
The 8-VDFN (DFN-8) exposed-pad package requires the central thermal pad to be soldered to a PCB ground-plane island of at least 10 mm x 10 mm to meet the datasheet's thermal-resistance specifications. Estimated: with theta_JA of approximately 60 C/W on a 4-layer JEDEC test board (per Microchip datasheet 41365D thermal table), the die dissipating 100 mW yields a junction temperature rise of 6 C above ambient, well within the -40 C to +85 C industrial range. For hand-soldered prototypes, ensure the exposed pad is properly reflowed to avoid intermittent thermal contact that biases ADC readings.
Place a 0.1 uF decoupling capacitor as close as possible to the VDD pin (Pin 1) with a short trace to the VSS ground plane. For HV-shunt applications, keep the shunt resistor path short and away from the analog ADC traces to minimize noise injection into the ADC. The 8-VDFN footprint requires 3x3 mm land pads with a central 1.5x1.5 mm thermal pad - refer to Microchip packaging application notes for stencil aperture recommendations.
Do not leave the MCLR pin (GP3, Pin 4) floating - tie it to VDD via a 10 kohm pull-up resistor for normal operation, or to the ICD programmer for in-circuit debugging. The HV shunt regulator requires a specific external shunt resistor value per Microchip application note AN1031; selecting the wrong value can cause the VDD rail to drift out of the 2.0-5.5 V operating range and trigger brown-out resets. The GP3 pin is input-only - attempts to configure it as output are silently ignored by the peripheral.
Route the analog ADC inputs (AN0-AN3 on GP0-GP4) away from digital switching signals and the HV shunt path to minimize coupled noise. Use a ground-star topology with the analog and digital grounds joined at the device VSS pin. For HV-shunt designs, the shunt resistor's high-side connection should bypass with a 100 nF ceramic capacitor to filter switching noise from upstream converters that could couple into the VDD rail.
Compliance Information
RoHS compliant per Microchip product page. Not AEC-Q100 qualified in standard -I variant; choose -E variant or external regulator for automotive applications.
