PIC12HV609-I/P - 8-bit Flash MCU, 1.75KB Flash, 8MHz, PDIP-8
MPN: PIC12HV609-I/P ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.21 | $1.21 |
| 10 | $1.09 | $10.90 |
| 100 | $0.97 | $97.00 |
| 500 | $0.85 | $425.00 |
| 1,000 | $0.74 | $740.00 |
PIC12HV609-I/P Overview
A microcontroller (MCU) is a single-chip computer containing a CPU core, program and data memory, I/O peripherals, and clock generation. The 8-bit PIC architecture uses a RISC instruction set with 35 single-word instructions and a 200 ns instruction cycle at 20 MHz, simplifying code generation in MPLAB X IDE while keeping deterministic real-time response. The PIC12 sub-family specifically targets space-constrained, low-pin-count applications such as appliance control, sensor front-ends, and battery-powered devices.
Key features include four timers (Timer0, Timer1, Timer2, WDT), one enhanced Capture/Compare/PWM (ECCP) module, two analog comparators with selectable references, 6 general-purpose I/O pins, an internal shunt regulator for high-voltage operation (the "HV" suffix), Brown-Out Reset (BOR), Power-On Reset (POR), and an ICD debug interface. The PIC12HV609 is electrically identical to the PIC12F609 but adds an internal shunt regulator, allowing direct operation from supplies up to ~13.5 V without an external 5V regulator.
Typical applications include LED lighting drivers, battery chargers, power-supply auxiliary controllers, smoke detectors, fan controls, and small appliance interfaces. The combination of Flash memory, internal oscillator, and high-voltage tolerance minimizes external component count.
When designing with the PIC12HV609-I/P, verify that the high-voltage (HV) shunt current rating matches your supply; the internal shunt dissipates Vdd_delta * I_shunt. Always use a 0.1 uF decoupling capacitor within 5 mm of the Vdd pin and keep the ICSP clock/data traces short for reliable in-circuit programming.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for PIC12HV609-I/P — 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/P (same form factor and footprint) — differing in Package, Internal Oscillator, Program Memory (Flash), Timers, Data EEPROM.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC12F609-I/P
✅ Drop-In📋 Reference alternative (not in catalog)
PIC12HV609-I/SN
✅ Drop-In✓ In Stock
$0.82 / Unit
View Datasheet →PIC12HV615-I/P
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$0.82 / Unit
View Datasheet →PIC12F615-I/P
✅ Drop-In✓ In Stock
$0.78 / Unit
View Datasheet →PIC12F617-I/P
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$1.14 / Unit
View Datasheet →PIC12F1572-I/P
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$0.84 / Unit
View Datasheet →PIC12HV609-I/P Maximum Ratings & Electrical Characteristics
| Product Type | 8-bit Flash Microcontroller (MCU) |
| Core Architecture | PIC12 / mid-range 8-bit RISC |
| Instruction Set | 35 single-word instructions |
| Program Memory (Flash) | 1.75 KB (1K x 14 words) |
| Data RAM | 64 bytes |
| Data EEPROM | None |
| Max CPU Clock Frequency | 20 MHz |
| Internal Oscillator | 8 MHz (4 MHz / 31 kHz LF selectable) |
| Supply Voltage (VDD) | 2.0 V to 5.5 V |
| High-Voltage Shunt (HV variant) | Internal shunt regulator for high VDD supply |
| I/O Pins | 6 GPIO |
| Timers | Timer0, Timer1, Timer2, WDT |
| PWM Modules | 1x ECCP (Enhanced Capture/Compare/PWM) |
| Analog Comparators | 2 |
| ADC | None (no ADC on PIC12HV609) |
| Package | PDIP-8 (through-hole, 300 mil) |
| Operating Temperature Range | -40C to +85C (Industrial) |
| Mounting Type | Through-Hole (DIP) |
| MSL Level | 1 (unlimited floor life) |
| RoHS Status | Compliant |
PIC12HV609-I/P Pin Configuration
| Pin 1 | VDD — Positive supply voltage; decouple with 0.1 uF ceramic capacitor |
| Pin 2 | RA5/T1CKI/OSC1/CLKIN — GPIO RA5 / Timer1 clock input / crystal oscillator input / external clock input |
| Pin 3 | RA4/AN3/CMP2/T1G/OSC2/CLKOUT — GPIO RA4 / analog input / comparator-2 output / Timer1 gate / oscillator output / clock output |
| Pin 4 | RA3/MCLR/VPP — GPIO RA3 / Master Clear (reset, active low) / programming voltage |
| Pin 5 | RA2/AN2/T0CKI/CMP1 — GPIO RA2 / analog input / Timer0 clock input / comparator-1 output |
| Pin 6 | RA1/AN1/CMP1OUT/ICSPCLK — GPIO RA1 / analog input / comparator-1 output / ICSP clock |
| Pin 7 | RA0/AN0/CMP0OUT/ICSPDAT — GPIO RA0 / analog input / comparator-0 output / ICSP data |
| Pin 8 | VSS — Ground reference |
Typical Applications
PIC12HV609-I/P is suitable for 6 applications: AC Line-Powered LED Driver Controller, Battery Charger Auxiliary Controller, Smoke Detector / CO Sensor Front-End, Small Fan Speed Controller, Capacitive Touch User Interface, Household Appliance Timer / Relay Controller.
AC Line-Powered LED Driver Controller
The PIC12HV609-I/P fits AC-line-powered LED lighting drivers because its internal high-voltage shunt regulator directly accepts rectified mains-derived DC up to ~13.5 V, eliminating the external 5V LDO. With the ECCP PWM module delivering hardware-driven current control and the 8 MHz internal oscillator enabling deterministic 200 ns instruction timing, the part runs closed-loop constant-current regulation in compact GU10/MR16 bulb form factors. A single comparator enables zero-cross detection for phase-angle dimming, while 1.75 KB Flash is sufficient for table-driven dimming curves. Designers should size the HV shunt resistor to limit inrush current at power-on and verify junction temperature under sustained VDD drop.
Recommended
Battery Charger Auxiliary Controller
In small lithium-ion or NiMH charger modules, the PIC12HV609-I/P serves as the charge-state supervisor, reading comparator inputs for voltage and current thresholds and gating the charging MOSFET via ECCP PWM. The 8-pin PDIP package simplifies through-hole prototyping on perforated prototyping boards, while 1.75 KB Flash accommodates multi-stage CC/CV charging algorithms. The internal HV shunt allows direct connection to a 12 V wall-adapter rail without an external regulator. Typical designs use the WDT and BOR to recover from brown-out events on the AC adapter; designers must add a current-sense resistor and reference network since the part has no ADC.
Recommended
Smoke Detector / CO Sensor Front-End
The PIC12HV609-I/P is widely used in ionization-chamber smoke detector designs as the supervisory microcontroller, monitoring the analog comparator tied to the chamber and driving the piezoelectric alarm via the ECCP PWM module for tone generation. Its industrial -40C to +85C rating covers residential detector environments, and the low-power 31 kHz LF oscillator allows long battery life in stand-by. With 6 GPIO pins, the device handles chamber sensing, horn drive, low-battery detect, and an Hush/Test button. The high-voltage shunt capability lets the same MCU work directly from a 9V battery with regulated 5V internal logic. Designers should use the WDT to recover from oscillator stall conditions.
Recommended
Small Fan Speed Controller
The PIC12HV609-I/P serves as a closed-loop DC brushless-fan speed controller, using the comparator to sense back-EMF zero-cross events and the ECCP module to drive the FET gate in PWM. Its 1.75 KB Flash stores configurable RPM setpoints and ramp profiles, while the 8 MHz internal oscillator drives the commutation timing with adequate resolution. The HV shunt regulator lets the part operate directly from a 12 V fan rail, simplifying the BOM to just the MCU, gate driver, FETs, and a sense resistor. With 64 bytes RAM, designers typically implement state machines with minimal buffering.
Recommended
Capacitive Touch User Interface
The PIC12HV609-I/P can drive a small capacitive touch button matrix using the mTouch peripheral support and comparator for charge-time measurement, since dedicated CTMU is not on this die but software-based techniques with the comparator are well-documented. The 8-pin PDIP package and 1.75 KB Flash easily hold a 4-button scan engine and LED feedback logic. The HV shunt allows direct operation from a 12 V supply in appliances. A typical design cycles the comparator reference and uses Timer0 for discharge timing; designers should add ESD protection on the touch pads and an RC debounce on the wake-up button.
Recommended
Household Appliance Timer / Relay Controller
In washing machines, dishwashers, and microwave oven control boards, the PIC12HV609-I/P acts as a sub-controller for timer and relay sequencing, with the ECCP PWM driving a buzzer or triac gate and the GPIO pins switching low-side relays. The internal HV shunt regulator eliminates an external 5V LDO when powered from a 12 V rectified auxiliary rail. Its -40C to +85C industrial rating covers under-cabinet appliance environments, and 1.75 KB Flash easily accommodates a 24-hour wash-cycle state machine. The WDT and BOR together ensure recovery from supply glitches common in motor-load applications.
Recommended
Recommended Products Summary
Engineering reference data for PIC12HV609-I/P — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC12F609-I/P | PIC12HV609-I/SN | PIC12HV615-I/P | PIC12F615-I/P | PIC12F617-I/P | PIC12F1572-I/P |
|---|---|---|---|---|---|---|---|
| Package | PDIP-8 | PDIP-8 - same | SOIC-8 (SMD) | PDIP-8 - same | PDIP-8 - same | PDIP-8 - same | PDIP-8 - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory (Flash) | 1.75 KB (1K x 14) | 1.75 KB - same | 1.75 KB - same | 1.75 KB - same | 2 KB | 2 KB | 3.5 KB |
| Data RAM | 64 bytes | 64 bytes - same | 64 bytes - same | 64 bytes - same | 128 bytes | 128 bytes | 128 bytes |
| Internal HV Shunt Regulator | Yes (high-V supply up to ~13.5 V) | No (5.5 V max VDD) | Yes - same | Yes - same | No | No | No |
| ADC | None | None | None | 10-bit | 10-bit | 10-bit | 10-bit |
| ECCP / PWM Channels | 1x ECCP | 1x ECCP | 1x ECCP | 1x ECCP | 1x ECCP | 1x ECCP | 3x 16-bit PWM |
| Internal Oscillator | 8 MHz (4 MHz / 31 kHz LF) | 8 MHz - same | 8 MHz - same | 8 MHz - same | 8 MHz - same | 8 MHz - same | 16 MHz (HF) + 32 kHz LF |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| Approx. Unit Price (qty 1, as of 2026-09-15) | USD 1.21 | USD 0.95 (typical) | USD 1.18 (typical) | USD 1.40 (typical) | USD 1.30 (typical) | USD 1.45 (typical) | USD 1.55 (typical) |
Key Differentiators
- Internal high-voltage shunt regulator (vs PIC12F609-I/P)
- Smaller memory footprint, lower cost (vs PIC12HV615-I/P)
- Through-hole PDIP-8 ease-of-use vs modern SMD-only PIC12F1572 (vs PIC12F1572-I/P)
Design Notes
The PIC12HV609-I/P's internal high-voltage (HV) shunt regulator accepts supply rails up to approximately 13.5 V across the VDD pin and dissipates the excess voltage internally. Sizing rule of thumb: choose the shunt resistor to keep the regulator in the linear region. Estimated: for a 12 V supply with internal VDD = 5 V, I_shunt ~ 5-10 mA is typical, yielding P_shunt ~ 35-70 mW which is well within thermal limits. Always place the decoupling 0.1 uF capacitor within 5 mm of the VDD pin.
Configuration word errors are the most common reason PIC12HV609 prototypes fail to start. The CONFIG register must explicitly disable features such as LV reset voltage threshold and enable the internal MCLR when not using an external pull-up. Brown-Out Reset (BOR) should be enabled to recover from VDD sag; without it, the device can latch into undefined states. Refer to the manufacturer datasheet section on Configuration Words (DS41302E) before first programming.
Keep ICSP traces (RA0/ICSPDAT and RA1/ICSPCLK) short and route them away from switching nodes to ensure reliable in-circuit programming under noisy conditions. Place a 100 kohm pull-up on MCLR/RA3/VPP. Add a 100 nF decoupling capacitor and, if the application drives inductive loads, place a snubber network within 10 mm of the connector. Pin 1 (VDD) and Pin 8 (VSS) should be connected to wide copper pours to minimize ground bounce.
Through-hole PDIP-8 is forgiving for hand-soldered prototypes but requires plated through-hole pads on the PCB. Use 0.6-0.8 mm drill holes and annular rings at least 0.2 mm wider than the 0.51 mm nominal lead pitch. If migrating to the SOIC-8 (PIC12HV609-I/SN), reduce trace lengths to less than 25 mm for clock lines to avoid signal integrity issues at 20 MHz.
Compliance Information
RoHS and REACH compliance per Microchip product page. Not AEC-Q100 qualified (industrial grade only - choose PIC12HV609-E/P for extended temp or automotive-rated variants from other families).
