PIC12HV609-I/SN - 8-Bit 20MHz MCU, 1.75KB Flash, 8-SOIC | Microchip
MPN: PIC12HV609-I/SN ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.45 | $1.45 |
| 10 | $1.3 | $13.00 |
| 100 | $1.12 | $112.00 |
| 500 | $0.95 | $475.00 |
| 1,000 | $0.82 | $820.00 |
PIC12HV609-I/SN Overview
An 8-bit microcontroller (MCU) is a small, self-contained computer-on-a-chip integrating a CPU, program memory, data RAM, and peripherals into a single silicon die. The PIC12HV609 belongs to the mid-range PIC12 family of 8-bit PIC microcontrollers, itself part of the larger PIC microcontroller hierarchy (PIC10/12/16/18) within the broader category of microcontrollers (MCU) and embedded computing ICs. Its defining feature is the 'HV' suffix, indicating integrated high-voltage shunt regulator support allowing direct operation from 2V to user-defined higher rails via an internal shunt regulator - unusual for 8-pin flash MCUs.
Key features include a 20MHz internal/external clock, 8-bit architecture with 35 single-word instructions, four channels of 10-bit ADC, one 8-bit and one 16-bit timer, an internal voltage reference, and an enhanced capture/compare/PWM module. The HV variant integrates a 5.1V-13V shunt regulator on the supply pin, allowing direct connection to rectified mains or higher DC buses without an external regulator. Brown-out reset, power-on reset, and a watchdog timer provide system reliability.
Designed for fan control, LED lighting, and high-voltage sensing applications, the PIC12HV609's enhanced PWM and integrated HV shunt simplify closed-loop BLDC and brushless fan designs. The Harvard RISC architecture executes instructions in a single cycle, achieving 200ns instruction time at 20MHz.
Primary uses include BLDC ceiling fan motor control, AC-line-powered LED drivers, appliance controls, and low-cost high-voltage sensor interfaces. Industrial temperature range suits automotive and appliance environments. The 8-pin SOIC footprint enables compact designs while preserving easy hand-soldering.
When designing with this device, ensure the shunt regulator current budget matches the application - the internal shunt dissipates excess voltage as heat. For AC mains rectification applications, isolate the digital logic from line-voltage transients with adequate PCB clearance and TVS protection.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for PIC12HV609-I/SN — 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/SN (same form factor and footprint) — differing in Package, ADC, Operating Temperature, Timers, Internal Oscillator.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC12HV609-I/P
✅ Drop-In✓ In Stock
$0.74 / Unit
View Datasheet →PIC12HV609-I/MS
✅ Drop-In✓ In Stock
$0.76 / Unit
View Datasheet →PIC12HV609-E/SN
✅ Drop-In✓ In Stock
$0.76 / Unit
View Datasheet →PIC12F609-I/SN
✅ Drop-In✓ In Stock
$0.45 / Unit
View Datasheet →PIC12F609T-I/MD
✅ Drop-In✓ In Stock
$0.51 / Unit
View Datasheet →PIC12F615-I/SN
✅ Drop-In✓ In Stock
$0.52 / Unit
View Datasheet →PIC12F617-I/SN
✅ Drop-In✓ In Stock
$0.85 / Unit
View Datasheet →PIC12HV609-I/SN Maximum Ratings & Electrical Characteristics
| Product Series | PIC12 |
| Core | PIC 8-bit RISC |
| Architecture | Harvard RISC, 14-bit instruction word |
| Program Memory (Flash) | 1.75 KB (1K x 14) |
| Data RAM | 64 bytes |
| Maximum CPU Frequency | 20 MHz |
| Instruction Execution Time | 200 ns (single-cycle at 20MHz) |
| Supply Voltage Range | 2.0 V to 5.5 V (regulated) |
| Shunt Regulator Voltage | 5.1 V to 13 V (internal HV shunt) |
| Number of I/O Pins | 6 |
| ADC | 4 channels x 10-bit |
| Timers | 1 x 8-bit, 1 x 16-bit |
| PWM Module | Enhanced CCP (ECCP) + standard CCP |
| Internal Voltage Reference | Yes |
| Package | 8-SOIC (SN), 3.90 mm body width |
| Operating Temperature Range | -40 C to +85 C (Industrial) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
PIC12HV609-I/SN Pin Configuration
| Pin 1 | VDD — Positive supply voltage / HV shunt regulator input |
| Pin 2 | GP5/T1CKI/OSC1/CLKIN — GPIO 5 / Timer1 clock input / Oscillator input / External clock input |
| Pin 3 | GP4/AN3/T1G/OSC2/CLKOUT — GPIO 4 / ADC input 3 / Timer1 gate / Oscillator output / Clock output |
| Pin 4 | GP3/MCLR/VPP — GPIO 3 / Master clear reset (active low) / Programming voltage input |
| Pin 5 | GP2/AN2/T0CKI/INT/COUT/CCP1 — GPIO 2 / ADC input 2 / Timer0 clock / External interrupt / Comparator output / CCP1 PWM |
| Pin 6 | GP1/AN1/CIN-/ICSPCLK — GPIO 1 / ADC input 1 / Comparator inverting input / ICSP clock |
| Pin 7 | GP0/AN0/CIN+/ICSPDAT — GPIO 0 / ADC input 0 / Comparator non-inverting input / ICSP data |
| Pin 8 | VSS — Ground reference |
Typical Applications
PIC12HV609-I/SN is suitable for 6 applications: BLDC Ceiling Fan Motor Control, AC-Line LED Driver Controller, Appliance User Interface Controllers, High-Voltage Sensor Interface Module, Battery Charger Status and Fuel Gauge MCU, Toy and Hobby Electronic Drives.
BLDC Ceiling Fan Motor Control
The PIC12HV609's integrated 5.1V-13V HV shunt regulator enables direct connection to rectified AC mains (e.g., 12V or 24V DC bus after bridge rectification), eliminating an external regulator and reducing BOM cost. The Enhanced CCP module supports full-bridge PWM outputs needed to drive a 3-phase BLDC fan motor via discrete gate drivers. With 20MHz CPU and 200ns instruction time, the device executes field-oriented control (FOC) or trapezoidal commutation at switching frequencies of 20-30kHz. The 4-channel 10-bit ADC samples motor current and back-EMF for sensorless commutation. Industrial -40C to +85C temperature grade suits ceiling fan enclosures.
Recommended
AC-Line LED Driver Controller
The PIC12HV609's HV shunt regulator accepts rectified mains voltages from 5.1V to 13V directly, making it ideal for AC-line powered LED lighting controllers and dimmer circuits. The 1.75KB flash supports Triac-dimmable LED driver firmware with adaptive dimming curves, while the 64B RAM handles phase-angle measurement and timing. The 10-bit ADC samples the AC phase angle to detect leading-edge or trailing-edge dimmer types. The industrial temperature range supports enclosed fixture environments where ambient temperatures can exceed 70C. Compact 8-SOIC package fits within MR16, GU10, and A19 bulb form factors.
Recommended
Appliance User Interface Controllers
The PIC12HV609 powers low-cost user-interface MCUs in white goods and small appliances such as rice cookers, induction cooktops, and washing machine sub-modules. Its 6 I/O pins drive capacitive touch buttons via the on-chip mTouch peripheral, status LEDs, and a buzzer for user feedback. The 1.75KB flash stores application state machines, while 64B RAM handles debounced button state. The HV shunt accepts a wide rectified DC range (5.1V-13V) from appliance internal rails without requiring precise pre-regulation. Industrial temperature and 8-SOIC package fit compact appliance control boards.
Recommended
High-Voltage Sensor Interface Module
Industrial sensors monitoring mains-derived voltages (solar inverter current shunts, EV charging pilot signals, motor contactor coils) use the PIC12HV609 as a local conditioning MCU. The HV shunt regulator accepts 5.1V-13V rail voltages from auxiliary supplies without a pre-regulator, reducing component count. The 10-bit ADC reads current shunts, photo-coupler outputs, and thermistor bridges with 9.8 mV resolution at 5V FSR. The 20MHz CPU supports 10Hz to 1kHz data update rates. The 8-SOIC package is suitable for sensor housings.
Recommended
Battery Charger Status and Fuel Gauge MCU
In low-voltage battery charger ICs (e.g., 4-cell NiMH, single-cell LiFePO4), the PIC12HV609 operates as a status-display and charge-control MCU. Its 2.0V-5.5V regulated supply range accepts direct battery voltages (down to deeply discharged cells). The 6 I/O pins drive LED status bars, an I2C-bus to the charger frontend, and a UART to a host controller. The HV shunt remains inactive at low voltages but provides protection if a fault connects a high-voltage rail. The 8-SOIC footprint is compatible with charger daughter-card layouts.
Recommended
Toy and Hobby Electronic Drives
Battery-powered toy vehicles, drones, and hobby robotics benefit from the PIC12HV609's small footprint, low cost, and on-chip PWM. The Enhanced CCP drives hobby servo motors and small DC brushed motors directly, while the 10-bit ADC reads IR receivers, motor-current shunts, and battery voltage for safe shutdown. The 1.75KB flash supports a small RTOS or finite-state-machine firmware pattern. The 8-SOIC package supports hand-soldered prototypes and small-batch hobby runs at sub-$1 pricing.
Recommended
Recommended Products Summary
Engineering reference data for PIC12HV609-I/SN — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC12F609-I/SN | PIC12F615-I/SN | PIC12F617-I/SN |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 8-SOIC (SN) | 8-SOIC (SN) | 8-SOIC (SN) | 8-SOIC (SN) |
| Core / Architecture | PIC12 8-bit RISC | PIC12 8-bit RISC | PIC12 8-bit RISC | PIC12 8-bit RISC |
| Flash Program Memory | 1.75 KB | 1.75 KB (identical) | 1.0 KB (smaller) | 2.0 KB (larger) |
| RAM | 64 bytes | 64 bytes (identical) | 64 bytes (identical) | 128 bytes (larger) |
| Maximum CPU Frequency | 20 MHz | 20 MHz (identical) | 20 MHz (identical) | 20 MHz (identical) |
| HV Shunt Regulator | 5.1V to 13V internal shunt | None (2.0V-5.5V regulated only) | None (2.0V-5.5V regulated only) | None (2.0V-5.5V regulated only) |
| Supply Voltage Range | 2.0V to 13V (HV shunt active) | 2.0V to 5.5V | 2.0V to 5.5V | 2.0V to 5.5V |
| ADC | 4 ch x 10-bit | 4 ch x 10-bit (identical) | 4 ch x 10-bit (identical) | 4 ch x 10-bit (identical) |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C (identical) | -40C to +85C (identical) | -40C to +85C (identical) |
| Unit Price (qty 1, USD) | $1.45 | ~$1.30 | ~$1.10 | ~$1.50 |
Key Differentiators
- Integrated HV shunt regulator (5.1V to 13V) (vs PIC12F609-I/SN)
- 1.75 KB flash with self-programming support (vs PIC12F615-I/SN)
- Enhanced CCP (ECCP) module (vs PIC12F617-I/SN)
- Industrial temperature range at low cost (vs PIC12F683-I/P)
- Compact 8-SOIC package with high-voltage capability (vs PIC12F752-I/P)
Design Notes
Estimated: At maximum HV shunt operation with VIN=13V, VDD=5.0V, and MCU consumption of 5mA, the shunt dissipates (13V - 5.0V) * 5mA = 40 mW. This is within the SOIC-8 package rating of ~400mW (theta_JA ~163 C/W), giving a 6.5 C junction rise. However, the shunt must also handle external loads; if used to power a 20mA sensor, dissipation rises to (13V-5V) * 25mA = 200 mW = 32 C rise. Thermal layout with copper pours or thermal vias is recommended for high-shunt-current applications.
The HV shunt regulator pin requires an external resistor to set the shunt current. According to Microchip's PIC12HV609 datasheet, the typical shunt current is configured by Rshunt = (VIN - 5.1V) / Ishunt. For 13V input and 5mA shunt current, use Rshunt = (13 - 5.1) / 0.005 = 1.58 kohm (1.5 kohm standard). Add a decoupling capacitor of 0.1uF close to the VDD pin to filter shunt-regulator switching transients.
Place the shunt resistor (Rshunt) and VDD decoupling capacitor (0.1uF ceramic + 10uF bulk) within 5mm of the VDD pin. For AC-mains-rectified applications, maintain 6mm minimum clearance between the VDD pin trace and any low-voltage digital traces per IPC-2221. Use a separate ground island for the HV shunt return path to avoid coupling shunt switching noise into sensitive analog ADC inputs.
Do not apply >13V to VDD - the shunt regulator clamps at 13V but exceeding this damages the ESD diodes. The MCLR/GP3 pin (pin 4) must be pulled high through a 10k resistor; floating MCLR causes intermittent resets. Note the PIC12HV609's pin 1 is VDD, not standard SOIC pin-1 marking; verify pinout against the datasheet before soldering. For ICSP programming, the PGD/PGC pins are shared with GP0/GP1, so isolate these in hardware if external circuitry drives them.
When using the on-chip comparator for zero-cross detection of AC mains, add a 1nF capacitor across the comparator input to filter switching noise from the HV shunt regulator. The 10-bit ADC achieves best linearity (DNL < +/-1 LSB) when source impedance is below 10 kohm; for higher impedance sensors (>50 kohm thermistors), buffer with an external op-amp or use the internal 1.2V voltage reference to bias a voltage divider.
Compliance Information
Per Microchip product page and DigiKey product detail (1228756). Not AEC-Q100 qualified - choose PIC12HV609-E/SN (extended temperature) or PIC12HV609 automotive-grade variant for automotive applications.
