PIC12HV609-E/P - 8-bit Flash MCU, 1.75KB, 8-Pin PDIP | Microchip
MPN: PIC12HV609-E/P ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.45 | $1.45 |
| 10 | $1.28 | $12.80 |
| 100 | $1.07 | $107.00 |
| 500 | $0.91 | $455.00 |
| 1,000 | $0.78 | $780.00 |
PIC12HV609-E/P Overview
A microcontroller (MCU) is a single-chip computer containing a CPU core, program and data memory, timers, I/O peripherals, and interrupt logic. Within the broader taxonomy, the PIC12HV609 belongs to the 8-bit microcontroller class -> RISC microcontroller family -> embedded controller -> semiconductor IC. The PIC12HV609 specifically sits in the PIC10/12/16 mid-range family, characterized by a 14-bit instruction word, 8-level hardware stack, and the lowest pin counts in the Microchip portfolio (6/8/14 pin). The "HV" prefix indicates the integrated shunt voltage regulator, which is the defining feature distinguishing it from the standard PIC12F609 variant.
Key features include 5 general-purpose I/O pins plus 1 input-only pin with 25 mA source/sink capability for direct LED drive, individually programmable weak pull-ups, an analog comparator with programmable on-chip voltage reference, one 8-bit timer (TMR0), one 16-bit timer (TMR1), watchdog timer (WDT), enhanced power-on reset, brown-out reset (BOR), and in-circuit serial programming (ICSP). The wide operating voltage range and high-current I/O eliminate many external components typically required by competing MCUs.
Architecture-wise, the device uses a Harvard architecture with separate program and data buses, allowing simultaneous instruction fetch and data access. The mid-range core executes one instruction per clock cycle (except branched instructions), delivering ~1 MIPS at 4 MHz. The integrated shunt regulator uses an external resistor network tied to the HV pin, providing regulated VDD for the core from a higher-voltage source.
Typical applications include AC line-powered appliance control, LED lighting drivers, battery chargers, smart sensors, white goods control boards, and any cost-sensitive embedded application requiring a high-voltage-tolerant MCU without an external regulator. The high-voltage shunt simplifies isolated offline designs where a small switching supply feeds the HV pin directly.
When designing with this part, choose the shunt resistor value based on the expected supply current (typically 4-50 mA range) and verify power dissipation in the shunt element. For battery applications where the HV input is not used, consider the PIC12F609 family instead to avoid quiescent current draw through the shunt path.
Drop-in alternatives for PIC12HV609-E/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-E/P (same form factor and footprint) — differing in Timers, Package, ADC, I/O Pins, 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 →PIC12F609-E/P
✅ Drop-In✓ In Stock
$0.78 / Unit
View Datasheet →PIC12HV609-E/SN
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$0.76 / Unit
View Datasheet →PIC12F615-E/P
✅ Drop-In✓ In Stock
$0.74 / Unit
View Datasheet →PIC12F675-I/P
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
PIC12F683-E/P
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$1.18 / Unit
View Datasheet →PIC12HV609-E/P Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC mid-range 8-bit RISC |
| Program Memory (Flash) | 1.75 KB |
| RAM | 64 bytes |
| Instruction Set | 35 instructions, 8 stack levels |
| Operating Voltage | 2.0V to user-defined HV (shunt regulated to 5V) |
| Internal Oscillator | 4 MHz / 8 MHz selectable |
| I/O Pins | 5 GPIO + 1 input-only |
| I/O Source/Sink Current | 25 mA per pin |
| Timers | 1x 8-bit (TMR0), 1x 16-bit (TMR1) |
| Watchdog Timer (WDT) | Yes |
| Analog Comparator | 1 with programmable on-chip voltage reference |
| Shunt Voltage Regulator | 5V regulation, 4 mA to 50 mA range |
| Brown-Out Reset (BOR) | Yes |
| In-Circuit Serial Programming (ICSP) | Yes |
| Package | 8-pin PDIP (P) |
| Operating Temperature | -40C to +125C (E suffix = Extended) |
| RoHS Status | Compliant |
PIC12HV609-E/P Pin Configuration
| Pin 1 | VDD — Positive supply (regulated 5V from internal HV shunt or external source) |
| Pin 2 | GP5/T1CKI/OSC1/CLKIN — GPIO / Timer1 clock input / crystal oscillator input |
| Pin 3 | GP4/AN3/T1G/OSC2/CLKOUT — GPIO / analog input / Timer1 gate / crystal oscillator output |
| Pin 4 | GP3/MCLR/VPP — GPIO / Master Clear reset (active low) / programming voltage |
| Pin 5 | GP2/AN2/T0CKI/INT/COUT — GPIO / analog input / TMR0 clock / external interrupt / comparator output |
| Pin 6 | GP1/AN1/CIN-/ICSPCLK — GPIO / analog input / comparator inverting / ICSP clock |
| Pin 7 | GP0/AN0/CIN+/ICSPDAT — GPIO / analog input / comparator non-inverting / ICSP data |
| Pin 8 | VSS — Ground reference |
Typical Applications
PIC12HV609-E/P is suitable for 6 applications: AC Line-Powered Appliance Control, LED Lighting Drivers and Controllers, Battery Chargers and Power Management, White Goods Control Boards, Smart Sensor Interfaces, Automotive Aftermarket Accessories.
AC Line-Powered Appliance Control
The PIC12HV609-E/P's integrated 5V shunt regulator (4-50 mA) eliminates the need for an external regulator in AC line applications. Place the device across a rectified HV DC rail with a current-limiting resistor on the HV pin, providing clean regulated VDD to the core from a 12V, 24V, or higher offline supply. Unlike the PIC12F609 family which requires a pre-regulated 5V rail, the HV variant operates directly from high-voltage DC, reducing BOM cost by one regulator IC. The 25 mA source/sink I/O capability can drive triac optocouplers or relay coils directly, while the on-chip analog comparator enables zero-crossing detection for phase-angle control of dimmers and motor speed controllers.
Recommended
LED Lighting Drivers and Controllers
The PIC12HV609-E/P suits LED driver applications because each GPIO pin sources/sinks up to 25 mA, enough to directly drive small indicator LEDs without buffer transistors. The integrated HV shunt allows direct connection to 12V or 24V LED supply rails without a separate regulator. TMR1 (16-bit) provides PWM outputs for dimming control, while the analog comparator with programmable voltage reference enables constant-current regulation by sensing shunt resistor voltage. Drop a PIC12HV609-E/P between the LED string and a current-sense resistor, run firmware to adjust duty cycle based on comparator threshold, and you have a compact programmable LED controller.
Recommended
Battery Chargers and Power Management
The PIC12HV609-E/P's HV shunt input makes it well-suited for battery charger control circuits where the supply rail is higher than 5V. The MCU can measure battery voltage via the analog comparator against the internal voltage reference, then control charge current via PWM on a GPIO pin driving a MOSFET or BJT. Operating directly from a 12V adapter without a 5V regulator reduces quiescent losses. Note: in pure battery-powered applications without an HV source, the PIC12F609 family is preferred to avoid shunt current draw. The 1.75KB Flash easily accommodates CC-CV charge profiles and LED status indication firmware.
Recommended
White Goods Control Boards
The PIC12HV609-E/P targets white goods (washing machines, dishwashers, ovens) where it monitors user inputs, drives relays, and reads sensor data. The HV shunt accepts the appliance's internal 12V or 24V DC bus, while 5 GPIO plus 1 input pin handle buttons, LEDs, buzzer, and relay control directly. The 16-bit TMR1 times washing cycles, and the watchdog timer recovers from firmware lockup - critical for unattended appliance safety. Combined with ICSP, field firmware updates are possible without disassembly. Many entry-level appliance designs use this exact MCU plus a few discrete triac drivers.
Recommended
Smart Sensor Interfaces
The PIC12HV609-E/P fits compact sensor interface modules where it reads an analog or digital sensor, performs local processing, and outputs the result via GPIO or PWM. The analog comparator with programmable on-chip voltage reference enables threshold detection without an external op-amp. Operating from 24V industrial sensor rails is possible via the HV shunt, eliminating the regulator in field-transmitter designs. The 1.75KB Flash supports calibration coefficients and linearization tables, while 64 bytes of RAM holds current readings. Designers often pair this MCU with a 4-20 mA current loop transmitter or HART modem for industrial sensor applications.
Recommended
Automotive Aftermarket Accessories
The PIC12HV609-E/P is usable in 12V automotive aftermarket accessories (interior lighting, alarm systems, auxiliary controllers) where the integrated HV shunt operates directly from the 12V battery rail. The extended -40C to +125C temperature grade handles under-dash thermal environments. GPIO pins can drive automotive LEDs, relays, or buzzer directly. For OEM automotive designs, however, an AEC-Q100-qualified part is required, so this MCU is limited to aftermarket/retrofit applications rather than factory-installed ECUs. The brown-out reset and watchdog timer ensure reliable cold-crank and load-dump recovery.
Recommended
Recommended Products Summary
Engineering reference data for PIC12HV609-E/P — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC12HV609-I/P | PIC12F609-E/P | PIC12F615-E/P | PIC12F675-I/P | PIC12F683-E/P |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | PDIP-8 | PDIP-8 - same | PDIP-8 - same | PDIP-8 - same | PDIP-8 - same | PDIP-8 - same |
| Program Memory (Flash) | 1.75 KB | 1.75 KB | 1.75 KB | 1.75 KB | 1.75 KB | 2 KB |
| RAM | 64 bytes | 64 bytes | 64 bytes | 64 bytes | 64 bytes | 128 bytes |
| HV Shunt Regulator | Yes (4-50 mA) | Yes (4-50 mA) | No | No | No | No |
| ADC | None (comparator only) | None | None | 10-bit, 4 channels | 10-bit, 4 channels | 10-bit, 4 channels |
| I/O Pins | 5 GPIO + 1 input | 5 GPIO + 1 input | 5 GPIO + 1 input | 5 GPIO + 1 input | 5 GPIO + 1 input | 5 GPIO + 1 input |
| Operating Temperature | -40C to +125C (E) | -40C to +85C (I) | -40C to +125C (E) | -40C to +125C (E) | -40C to +85C (I) | -40C to +125C (E) |
Key Differentiators
- Integrated HV shunt regulator eliminates external 5V LDO (vs PIC12F609-E/P)
- Extended temperature grade for industrial/automotive aftermarket (vs PIC12HV609-I/P)
- Larger Flash and RAM than PIC10F and PIC12F508/509 baseline (vs PIC12F508-I/P)
Design Notes
The HV shunt regulator requires an external resistor between the high-voltage supply and the VDD pin to limit current into the shunt. Choose R_SHUNT so that I_SHUNT = (V_HV - 5V) / R_SHUNT falls within the 4-50 mA regulation range for all expected MCU load + peripheral conditions. If load current momentarily exceeds 50 mA, the shunt will drop out of regulation; add a reservoir capacitor on VDD to supply peak transients. For purely 5V designs, replace the HV shunt with a direct 5V rail on VDD and use the PIC12F609 family instead to avoid wasted quiescent current through the shunt path.
Place the VDD decoupling capacitor (100 nF ceramic + 10 uF bulk) as close to pins 1 and 8 as possible. Route the HV shunt resistor directly to the VDD pin, keeping the high-current path away from sensitive analog comparator input traces. The MCLR pin (pin 4) requires a pull-up to VDD if not used as GPIO; a 10 kohm resistor is typical. Add a 100 nF capacitor on MCLR if the pin is used in noisy environments. For ICSP, allocate dedicated test points or a 6-pin header on pins 6 and 7 to enable in-circuit programming without removing the MCU.
Do not assume GP3 is a normal GPIO when MCLR is enabled - it functions only as an input in that configuration. The analog comparator multiplexed onto GP0/GP1 means digital reads on those pins during comparator use will reflect the analog voltage, not a logic level. Brown-out reset (BOR) must be enabled in the configuration word to protect against VDD brown-out conditions; leaving BOR disabled can lead to corrupted Flash if VDD dips. The 1.75 KB Flash includes all program code, configuration words, and ID locations - budget carefully and reserve at least 10% for future firmware updates.
For AC line applications, isolate the high-voltage DC bus traces (rectifier output, HV shunt resistor) from low-voltage signal traces by at least 3 mm creepage distance. Use a slot in the PCB if the layout is dense. Keep the analog comparator input traces short and away from switching nodes (relay coils, TRIACs) to avoid false triggering. The ICSP pins share GPIO functions - if the ICSP header is permanently mounted, account for the additional 5-10 pF capacitance on those pins in timing-sensitive applications.
Compliance Information
RoHS compliant per Microchip product page. Not AEC-Q100 qualified - suitable for industrial and automotive aftermarket but not for factory-installed automotive ECUs.
