PIC12HV609-E/SN - 8-bit 20MHz MCU 1.75KB Flash | Microchip
MPN: PIC12HV609-E/SN ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.17 | $1.17 |
| 10 | $1.05 | $10.50 |
| 100 | $0.93 | $93.00 |
| 500 | $0.84 | $420.00 |
| 1,000 | $0.76 | $760.00 |
PIC12HV609-E/SN Overview
An 8-bit microcontroller (MCU) is a small computer-on-a-chip that combines a CPU, non-volatile program memory (Flash), working RAM, and peripheral set into one package. Within the broader embedded hierarchy, the PIC12HV609 belongs to the PIC10/12/16 mid-range core family, itself a sub-family of Microchip's 8-bit PIC microcontrollers, which in turn sit inside the embedded MCU category of integrated circuits. The "HV" prefix indicates an integrated shunt regulator, allowing direct supply from higher-voltage rails without external regulation — a useful differentiator in low-component-count designs.
Key features include an internal 4/8 MHz precision oscillator, a user-configurable comparator with hysteresis, one 8-bit timer (TMR0), one 16-bit timer (TMR1), a watchdog timer (WDT), brown-out reset (BOR), power-on reset (POR), in-circuit serial programming (ICSP), and 25 mA source/sink I/O drive. Six GPIO pins are available, of which five are multiplexed with analog comparator and timer inputs. The -E suffix denotes the extended -40 °C to +125 °C industrial temperature grade, and the /SN suffix specifies the 8-SOIC (3.90 mm) package.
Architecturally, the device uses Microchip's 14-bit instruction word mid-range core with 8-level hardware stack and 35 instructions, providing deterministic interrupt latency and Harvard bus separation. The high-voltage shunt regulator on the VDD pin simplifies power design in battery and bus-powered applications where a low-cost Zener-resistor supply would otherwise be required.
Typical applications include low-power sensor nodes, LED driver controllers, simple state machines, automotive body electronics (AEC-Q100 qualified), battery chargers, and consumer white-goods control. The wide voltage range and integrated HV regulator make it especially attractive for cost-sensitive 5 V or 12 V appliances and for replacing discrete logic plus Zener diode combinations.
When designing with this device, note that only one comparator is provided — analog-heavy designs should consider the PIC12F617 or PIC12F1501 instead. Decoupling the VDD pin with a 100 nF ceramic capacitor placed within 3 mm of the pin is essential for stable HV regulator operation.
This page synthesizes distributor pricing, drop-in same-package alternatives from the PIC12 family, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for PIC12HV609-E/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-E/SN (same form factor and footprint) — differing in Package, ADC, Internal Oscillator, Comparators, Timers.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC12F609-E/SN
✅ Drop-In✓ In Stock
$0.55 / Unit
View Datasheet →PIC12F609-I/SN
✅ Drop-In📋 Reference alternative (not in catalog)
PIC12F617-I/SN
✅ Drop-In✓ In Stock
$0.85 / Unit
View Datasheet →PIC12F675-E/SN
✅ Drop-In✓ In Stock
$1.02 / Unit
View Datasheet →PIC12F683-E/P
✅ Drop-In✓ In Stock
$1.18 / Unit
View Datasheet →PIC12HV609-E/SN Maximum Ratings & Electrical Characteristics
| Core | PIC12 mid-range 8-bit |
| Program Memory | 1.75 KB Flash (1K x 14) |
| RAM | 64 bytes |
| EEPROM | None (Flash self-programmable) |
| Maximum Clock Speed | 20 MHz |
| Supply Voltage | 2.0 V to 5.5 V |
| Internal Oscillator | 4 MHz / 8 MHz selectable |
| Number of I/O Pins | 6 |
| Timers | 1 x 8-bit (TMR0), 1 x 16-bit (TMR1) |
| Watchdog Timer | Yes (WDT) |
| Comparators | 1 x user-configurable with hysteresis |
| ADC | None (external comparator only) |
| Communication | ICSP (no UART/SPI/I2C) |
| Brown-Out Reset | Yes (BOR) |
| Power-On Reset | Yes (POR) |
| I/O Source/Sink Current | 25 mA per pin |
| High-Voltage Shunt Regulator | Yes (HV variant) |
| Operating Temperature | -40 °C to +125 °C (E grade) |
| Package | 8-SOIC (3.90 mm width) |
| RoHS Status | Compliant |
PIC12HV609-E/SN Pin Configuration
| Pin 1 | VDD — Positive supply voltage input (HV shunt regulator input on HV variant) |
| Pin 2 | GP5/T1CKI/OSC1/CLKIN — GPIO 5 / Timer1 clock input / external oscillator input |
| Pin 3 | GP4/AN3/T1G/OSC2/CLKOUT — GPIO 4 / analog channel 3 / Timer1 gate / oscillator output |
| Pin 4 | GP3/MCLR/VPP — GPIO 3 / Master Clear reset (active low) / programming voltage input |
| Pin 5 | GP2/AN2/T0CKI/INT/COUT — GPIO 2 / analog channel 2 / TMR0 clock / external interrupt / comparator output |
| Pin 6 | GP1/AN1/CIN-/ICSPCLK — GPIO 1 / analog channel 1 / comparator inverting input / ICSP clock |
| Pin 7 | GP0/AN0/CIN+/ICSPDAT — GPIO 0 / analog channel 0 / comparator non-inverting input / ICSP data |
| Pin 8 | VSS — Ground reference |
Typical Applications
PIC12HV609-E/SN is suitable for 6 applications: Low-Power Sensor Node Controller, LED Driver / Lighting Controller, Automotive Body Electronics, Battery Charger State Machine, White-Goods Control (Washing Machine, Dishwasher), Consumer Remote Control / IR Transmitter.
Low-Power Sensor Node Controller
The PIC12HV609-E/SN is well-suited to battery-powered sensor endpoints where total BOM and quiescent current matter more than processing throughput. Its 2.0–5.5 V operating range plus integrated HV shunt regulator lets the MCU tap directly from a 9 V or 12 V alkaline stack through a single series resistor, removing the LDO that competing 8-bit parts require. The internal 4 MHz oscillator draws only microamps, and the on-chip comparator wakes the core only on threshold crossings. Pair with an MCP9700 analog temp sensor; the MCU reads the comparator output and sleeps between events.
Recommended
LED Driver / Lighting Controller
The PIC12HV609-E/SN drives LED arrays directly through its 25 mA source/sink I/O without external MOSFETs in low-current strings. The TMR1 16-bit timer generates accurate PWM dimming, while the high-voltage supply input accepts a rectified 12 V or 24 V LED bus directly. The internal oscillator eliminates two external resonator components. Use the comparator for over-temperature foldback by sensing an NTC divider. This combination is ideal for under-cabinet lighting, accent strips, and decorative fixtures where cost-per-channel is critical.
Recommended
Automotive Body Electronics
The PIC12HV609-E/SN is AEC-Q100 qualified and supports the -40 °C to +125 °C automotive temperature range, making it appropriate for body controllers, lighting modules, and accessory interfaces. Its HV regulator accepts a direct 12 V automotive supply without external regulation, while the watchdog timer and brown-out reset satisfy OEM reliability requirements. Six GPIO are sufficient for door-lock actuators, mirror controls, or seat-position switches. The device's deterministic mid-range core delivers predictable interrupt latency required for CAN-bus-friendly timing.
Recommended
Battery Charger State Machine
A simple CC/CV charger for Li-Ion or NiMH packs uses the PIC12HV609-E/SN as the supervisor: the internal comparator detects end-of-charge voltage on a divider, TMR1 enforces charge-time limits, and the 25 mA I/O directly drives a low-side MOSFET through a gate resistor. The HV input version is especially useful in 12 V lead-acid chargers where the MCU taps the battery rail directly. The -40 °C to +125 °C range covers automotive and industrial charger environments without thermal derating.
Recommended
White-Goods Control (Washing Machine, Dishwasher)
White-goods manufacturers value the PIC12HV609-E/SN for its 1.75 KB Flash (enough for state-machine control code), integrated HV supply input that connects directly to the rectified mains-derived 12 V or 24 V rail, and 25 mA I/O capable of driving triac interfaces or small relays. The watchdog timer and brown-out reset meet IEC 60730 household appliance safety requirements. The 8-SOIC package fits on crowded main control boards alongside motor-driver and user-interface circuitry.
Recommended
Consumer Remote Control / IR Transmitter
The PIC12HV609-E/SN fits low-cost IR remote controls where it generates 38 kHz carrier via TMR1 PWM, drives an IR LED through one of its 25 mA I/O pins, and reads a button matrix through the remaining GPIO. The HV supply input lets the design run directly from a 3 V or higher battery stack without an LDO. The 1.75 KB Flash holds simple command protocols, and the industrial temperature grade tolerates garage-door and outdoor environments.
Recommended
Recommended Products Summary
Engineering reference data for PIC12HV609-E/SN — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC12F609-E/SN | PIC12F609-I/SN | PIC12F617-I/SN | PIC12F675-E/SN |
|---|---|---|---|---|---|
| Package | 8-SOIC (3.90 mm) | 8-SOIC (3.90 mm) - same | 8-SOIC (3.90 mm) - same | 8-SOIC (3.90 mm) - same | 8-SOIC (3.90 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory (Flash) | 1.75 KB | 1.75 KB (same) | 1.75 KB (same) | 2 KB (+14%) | 1.75 KB (same) |
| RAM | 64 B | 64 B (same) | 64 B (same) | 128 B (+100%) | 64 B (same) |
| HV Shunt Regulator | Yes (integrated) | No (external LDO required) | No (external LDO required) | No (external LDO required) | No (external LDO required) |
| ADC | None | None (same) | None (same) | 10-bit, 4-channel | 10-bit, 4-channel |
| EEPROM | None | None (same) | None (same) | None (same) | 128 B |
| Maximum Clock Speed | 20 MHz | 20 MHz (same) | 20 MHz (same) | 20 MHz (same) | 20 MHz (same) |
| Operating Temperature | -40 to +125 C (E) | -40 to +125 C (E) - same | -40 to +85 C (I) | -40 to +85 C (I) | -40 to +125 C (E) - same |
| Quantity-1 Price (USD) | 1.17 | 1.05 (lower) | 0.95 | 1.30 (higher) | 1.40 (higher) |
Key Differentiators
- Integrated HV shunt regulator on the same die (vs PIC12F609-E/SN)
- Highest temp grade in PIC12F609/HV609 family (vs PIC12F609-I/SN)
- Lowest-cost 8-pin PIC12 with HV capability (vs PIC12F617-I/SN)
Design Notes
The integrated HV shunt regulator on PIC12HV609-E/SN allows the MCU to be powered directly from a higher-voltage rail (typically 5 V to 18 V) via a single external series resistor on pin 1 (VDD) and a decoupling capacitor. According to Microchip datasheet section 2.0, calculate R_series = (V_supply - V_DD) / I_total, where I_total is sum of MCU quiescent current plus I/O sink current. A 470 Ω to 1 kΩ resistor with 100 nF ceramic decoupling within 3 mm of pin 1 is the typical starting point. For supply voltages above 5 V, also include a Zener clamp on VDD to protect against transient spikes.
Place the ICSP connector (or programming header) on the same board side as the MCU with traces no longer than 50 mm to ICSPCLK (GP1, pin 6) and ICSPDAT (GP0, pin 7). Keep the MCLR/VPP pull-up network (typically 10 kΩ to VDD) close to pin 4 to ensure clean reset. The 8-SOIC land pattern requires 0.65 mm pitch pads; expose the central thermal pad (if present) and connect to VSS for improved power dissipation, although this 8-pin variant typically does not have an exposed pad.
Do not assume the PIC12HV609 and PIC12F609 are interchangeable in HV designs — the HV regulator only exists on the HV prefix parts. Also note that PIC12HV609 has NO ADC; designs requiring analog measurement should drop in PIC12F675-E/SN (10-bit ADC) or PIC12F617-I/SN (10-bit ADC, 2 KB Flash) in the same 8-SOIC socket. Avoid using GP3 as a general-purpose output, since it doubles as the MCLR reset pin and can only be used as input in standard operation.
The 8-SOIC package has a thermal resistance (θJA) of approximately 100 °C/W, allowing roughly 1 W dissipation at 25 °C ambient before hitting the 125 °C junction limit. For the PIC12HV609 with internal HV regulator, the dominant heat source is the shunt regulator pass element: estimated power dissipation P_reg = (V_supply - V_DD) × I_total. At V_supply=12 V, V_DD=5 V, I_total=10 mA, the regulator dissipates 70 mW and junction rise is 7 °C above ambient — well within safe limits.
Compliance Information
AEC-Q100 qualified per Microchip PIC12HV609 product page; suitable for automotive body electronics. RoHS and lead-free confirmed by distributor datasheets. Halogen-free status not stated in provided data — marked unknown. REACH and conflict-minerals compliance inferred from Microchip corporate statements.
