PIC12HV609T-I/MD - 1.75KB Flash 8-bit MCU | Microchip | 8-DFN
MPN: PIC12HV609T-I/MD β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.2 | $1.20 |
| 10 | $1.08 | $10.80 |
| 100 | $0.95 | $95.00 |
| 500 | $0.84 | $420.00 |
| 1,000 | $0.76 | $760.00 |
| 3,300 | $0.68 | $2,244.00 |
PIC12HV609T-I/MD Overview
A PIC microcontroller (MCU) is a single-chip computer that combines a RISC CPU core, non-volatile flash program memory, RAM, and configurable peripherals around a compact die. The PIC12HV609 specifically is a low-pin-count (8-pin) member of Microchip's mid-range PIC family, optimized for cost-sensitive embedded applications where board area and BOM count matter more than raw computational throughput. It belongs to the broader hierarchy: 8-bit MCU -> microcontroller -> embedded processor -> semiconductor.
Key features of the PIC12HV609T-I/MD include a 20 MHz maximum CPU clock via the internal oscillator block, hardware timers (Timer0/Timer1/Timer2), a 10-bit Analog-to-Digital Converter (ADC) on selected pins, and a comparator with a programmable voltage reference. The "HV" suffix indicates an internal shunt voltage regulator that allows direct operation from higher-voltage supplies (such as 9V or 12V battery stacks) by regulating them down to the 5V internal rail.
The device uses Microchip's enhanced mid-range 8-bit RISC architecture with 35 single-word instructions and a 14-bit instruction word. Two I/O pins are 5V-tolerant on most variants, supporting mixed-voltage digital interfaces. The on-chip in-circuit serial programming (ICSP) interface lets the same chip be programmed after PCB assembly using only two signal lines, eliminating programming sockets and reducing manufacturing cost.
Typical applications include low-power sensor nodes, LED controllers, battery chargers, smoke detectors, and small appliance controls. The wide supply range (2.5V-5V) and built-in brown-out reset make it suitable for unregulated mains-powered or battery-powered systems. Industrial designs favor the -40C to +125C extended parts (PIC12HV609-E/MD), while the -I grade PIC12HV609T-I/MD is specified for commercial and light-industrial environments.
A key design tip is that the internal shunt regulator of the "HV" variant dissipates significant power when fed from a high-voltage source. At 9V VIN and 5 mA internal draw, expect roughly 20 mW of continuous dissipation, so the exposed pad (EP) must be soldered to a copper pour for thermal relief. Layout this ground pad generously to keep junction temperature in check.
This page synthesizes DigiKey distributor pricing, verified Microchip datasheet specs, same-package drop-in alternatives from Microchip's PIC12 family, and practical design guidance not found in any single distributor listing.
Drop-in alternatives for PIC12HV609T-I/MD β 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 PIC12HV609T-I/MD (same form factor and footprint) β differing in Timers, Internal Oscillator, Core Architecture, Instruction Set, Package.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
PIC12HV609-I/MD
β Drop-Inπ Reference alternative (not in catalog)
PIC12F609T-I/MD
β Drop-Inβ In Stock
$0.51 / Unit
View Datasheet βPIC12F609-I/MD
β Drop-Inβ In Stock
$0.71 / Unit
View Datasheet βPIC12F615T-I/MD
β Drop-Inπ Reference alternative (not in catalog)
PIC12F617-I/MD
β Drop-Inπ Reference alternative (not in catalog)
PIC12F683T-I/MD
β Drop-Inπ Reference alternative (not in catalog)
PIC12HV609T-I/MD Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC 8-bit RISC (enhanced mid-range) |
| Program Memory Type | Flash |
| Program Memory Size | 1.75 KB |
| RAM Size | 64 bytes |
| Data EEPROM | None (not specified in data) |
| Maximum CPU Speed | 20 MHz |
| Internal Oscillator | 8 MHz (software tunable via OSCTUNE) |
| Supply Voltage Range | 2.5 V to 5.5 V |
| I/O Pins | 6 |
| Package Type | DFN-EP, 3 x 3 mm, 0.90 mm height, 8-pin |
| Operating Temperature | -40C to +85C (industrial) |
| Timers | Timer0, Timer1, Timer2 (per family datasheet) |
| Internal Voltage Regulator | Yes (HV variant: shunt regulator) |
| In-Circuit Programming | ICSP via 2-wire interface |
| RoHS Status | Compliant |
| Mounting Type | Surface Mount |
PIC12HV609T-I/MD Pin Configuration
| Pin 1 | VDD β Positive supply voltage (2.5V-5.5V) |
| Pin 2 | GP5/OSC1/CLKIN β Bidirectional I/O / oscillator input / clock input |
| Pin 3 | GP4/OSC2/CLKOUT β Bidirectional I/O / oscillator output / clock output |
| Pin 4 | GP3/MCLR/VPP β Bidirectional I/O / Master Clear reset (active-low) / programming voltage |
| Pin 5 | GP2/AN2/T0CKI/INT/COUT β I/O / analog channel 2 / Timer0 clock / external interrupt / comparator output |
| Pin 6 | GP1/AN1/CIN-/VREF/ICSPCLK β I/O / analog channel 1 / comparator inverting input / VREF / ICSP clock |
| Pin 7 | GP0/AN0/CIN+/ULPWU/ICSPDAT β I/O / analog channel 0 / comparator non-inverting input / ultra-low-power wake-up / ICSP data |
| Pin 8 | VSS β Ground reference (and EP thermal pad on DFN package) |
Typical Applications
PIC12HV609T-I/MD is suitable for 6 applications: Smoke Detector Controller, LED Strip and Lighting Controller, Battery-Powered Sensor Node, Small Appliance and Fan Control, Remote Control Transmitter, Battery Charger and Monitor.
Smoke Detector Controller
The PIC12HV609T-I/MD's HV internal shunt regulator accepts 9V battery stacks directly, eliminating the LDO and shrinking the BOM in ionization or photoelectric smoke detectors. Its 6 I/O pins are enough for an analog photo-sensor input, buzzer driver, low-battery LED, and test button, while the 1.75 KB flash stores the horn pattern and self-diagnostic routine. The internal 8 MHz oscillator with OSCTUNE keeps timing accurate enough for the beep cadence without a crystal.
Recommended
LED Strip and Lighting Controller
The PIC12HV609T-I/MD drives addressable LED strips and accent lighting through 5V-tolerant I/O and PWM-capable peripherals. Its 1.75 KB flash accommodates small color-cycle algorithms, while the 64-byte RAM is sufficient for a frame buffer of a few dozen LEDs. Designers benefit from the HV regulator when drawing 12V-24V supply directly off the LED driver board, and the 6 I/O pins support data, clock, and a debug button.
Recommended
Battery-Powered Sensor Node
The PIC12HV609T-I/MD suits low-duty-cycle IoT nodes drawing microamps in sleep, waking periodically to read a sensor and transmit via a sub-GHz or BLE module. The HV regulator tolerates 2-cell lithium or 9V alkaline battery packs without a separate regulator, simplifying the power tree. Its 6 I/O pins route a temperature/humidity sensor, an interrupt-driven wake-up, and a UART to a wireless transceiver.
Recommended
Small Appliance and Fan Control
The PIC12HV609T-I/MD handles DC motor and triac-driven small appliances like blenders, fans, and humidifiers. Its internal 20 MHz clock runs PID loop control for fan speed, while the HV regulator accepts rectified 12V-24V DC without a separate regulator. Six I/O pins cover a triac gate, zero-cross detect, button input, status LED, tach feedback, and an optional UART debug port.
Recommended
Remote Control Transmitter
The PIC12HV609T-I/MD serves as the encoding MCU in IR or RF remote controls for TVs, set-top boxes, and garage openers. With 1.75 KB flash it stores dozens of button-to-command mappings, and the 64-byte RAM supports a simple rolling-code buffer for security remotes. Six I/O pins accommodate a 4x4 button matrix scanner plus an LED indicator and a single transmit line.
Recommended
Battery Charger and Monitor
The PIC12HV609T-I/MD monitors NiMH, Li-ion, or lead-acid battery packs, using its ADC and comparator for voltage and current sense while the HV regulator accepts charger input up to 5.5V directly. Six I/O pins drive charge FETs, status LEDs, and a one-wire or UART telemetry interface. The 1.75 KB flash holds lookup-table-based charging profiles for multi-chemistry packs.
Recommended
Recommended Products Summary
Engineering reference data for PIC12HV609T-I/MD β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC12HV609-I/MD | PIC12F609T-I/MD | PIC12F615T-I/MD | PIC12F617-I/MD | PIC12F683T-I/MD |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | DFN-8 EP (3x3 mm) | DFN-8 EP (3x3 mm) - same | DFN-8 EP (3x3 mm) - same | DFN-8 EP (3x3 mm) - same | DFN-8 EP (3x3 mm) - same | DFN-8 EP (3x3 mm) - same |
| Program Memory | 1.75 KB Flash | 1.75 KB Flash | 1.75 KB Flash | 1.75 KB Flash | 1.75 KB Flash | 2 KB Flash |
| RAM | 64 bytes | 64 bytes | 64 bytes | 64 bytes | 128 bytes | 128 bytes |
| Max Clock Speed | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Internal Voltage Regulator | Yes (HV shunt regulator) | Yes (HV shunt regulator) | No (direct 2.5V-5.5V supply only) | No | No | No |
| Supply Voltage Range | 2.5V to 5.5V (VDD); higher VIN via HV regulator | 2.5V to 5.5V (HV reg) | 2.0V to 5.5V | 2.0V to 5.5V | 2.0V to 5.5V | 2.0V to 5.5V |
| I/O Pins | 6 | 6 | 6 | 6 | 6 | 6 |
| Packaging Format | Tape & Reel (T suffix) | Tray/Tube (no T suffix) | Tape & Reel | Tape & Reel | Tray/Tube | Tape & Reel |
Key Differentiators
- Integrated HV shunt regulator (vs PIC12F609T-I/MD)
- Largest flash + ADC in 8-pin family (vs PIC12F683T-I/MD)
- Industrial temperature grade option (vs PIC12F609-E/MD)
Design Notes
The PIC12HV609's HV shunt regulator dissipates (VIN - 5V) x IQ continuously. Estimated: at VIN=9V and IQ=5 mA, dissipation is ~20 mW. At VIN=12V and IQ=10 mA it is ~70 mW - enough to warm the DFN-8 EP pad. Solder the EP pad to a ground copper pour of at least 100 mm2 to keep theta_JA in the datasheet's nominal range (~40-50 C/W) and avoid thermal shutdown.
Place the VDD bypass capacitor (100 nF X7R ceramic) within 3 mm of the VDD pin, and a 10 uF bulk capacitor on the same node to stabilize the HV shunt regulator. Keep the EP pad on the bottom of the DFN package clear of signal traces and stitch it to a ground plane with 9 thermal vias (0.3 mm drill) to maximize heat extraction.
Do not apply >5.5V directly to VDD on PIC12F609 variants - only the HV (PIC12HV609) parts include the shunt regulator. Also, the MCLR/VPP pin (pin 4) is shared with GP3 and must not be left floating; tie it to VDD through a 10 kohm resistor so the MCU does not enter reset mode spuriously. Brown-out reset (BOR) is enabled by configuration bits; leave it enabled unless a custom power-on sequence is required.
Route the ICSP clock and data lines (GP1/ICSPCLK and GP0/ICSPDAT) away from switching signals and oscillators to avoid in-circuit programming failures. Keep the MCLR trace short and free of capacitive loading so the ICSP programmer can drive it cleanly during firmware updates on the production line.
Compliance Information
RoHS-compliant per Microchip product page. No automotive AEC-Q100 grade on this part; for AEC-Q100-qualified PIC microcontrollers, use the PIC16/dsPIC33 families instead. Conflict minerals statement available from Microchip.
