PIC12HV609-I/MS - 8-bit Flash MCU 1.75KB 20MHz MSOP-8 | Microchip
MPN: PIC12HV609-I/MS ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.42 | $1.42 |
| 10 | $1.28 | $12.80 |
| 100 | $1.05 | $105.00 |
| 500 | $0.88 | $440.00 |
| 1,000 | $0.76 | $760.00 |
PIC12HV609-I/MS Overview
An 8-bit PIC microcontroller is a RISC-class single-chip MCU built around a Harvard architecture with separate program and data buses. The PIC12F/12HV family targets low-pin-count, cost-sensitive embedded applications where minimal BOM, on-chip peripherals, and nanoWatt sleep modes outweigh the need for higher MIPS. In a typical product taxonomy: PIC12HV609 -> PIC12F series -> PIC12 family -> PIC10/12/14/16/18 mid-range 8-bit MCU lineup -> Microcontroller -> Microprocessors & Controllers -> Semiconductors. Each PIC12 core executes one instruction per clock cycle (excluding branches), delivering ~5 MIPS at 20 MHz.
Key differentiating features include: 1.75 KB self-programmable flash with 100K endurance cycles, 64 bytes SRAM, 128 bytes EEPROM, an internal 8 MHz oscillator (with optional 31 kHz LF oscillator), six I/O pins with individual direction control, an 8-bit timer (TMR0) with an 8-bit prescaler, a 16-bit timer (TMR1), an enhanced PWM/capture/compare (ECCP) module, a 10-bit ADC with 4 input channels, a comparator with hysteresis, and the high-voltage shunt regulator that lets the chip run from 2.0 V-5.5 V with internal regulation. The MSOP-8 package has a typical theta-JA of ~206 C/W and supports industrial -40C to +85C operation.
Architecturally, the device uses a 14-bit instruction word with a 35-instruction RISC core, an 8-level hardware stack, and Microchip's nanoWatt Technology for sub-microamp sleep currents. The HV shunt regulator eliminates the need for an external regulator in 9V/12V battery or industrial bus applications, while the integrated ADC and comparator allow direct sensor conditioning without an external analog front end.
Typical applications include 9V/12V battery-powered sensor nodes, AC line-voltage zero-cross detection (via high-voltage tolerant I/O), fan-speed control loops, white-goods user-interface panels, and low-cost IR remote transmitters where the 20 MHz core delivers ample headroom for RC5/SIRC protocols. The HV regulator is also valuable in industrial 24V systems where the MCU can be powered directly from the bus through a series Zener.
When designing with this part, ensure the HV shunt regulator's current limit (sometimes called 'zener current') is respected: total current draw through the regulator must remain within the device's specification, otherwise internal heating may exceed the package's thermal envelope. For designs not requiring high-voltage tolerance, the PIC12F609 in the same MSOP-8 pinout is a drop-in lower-cost option.
Drop-in alternatives for PIC12HV609-I/MS — 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/MS (same form factor and footprint) — differing in Internal Oscillator, Package, Timers, ADC, Comparators.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC12F609-I/MD
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$0.71 / Unit
View Datasheet →PIC12F609-E/MS
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$0.59 / Unit
View Datasheet →PIC12F615-H/MD
✅ Drop-In✓ In Stock
$0.54 / Unit
View Datasheet →PIC12F617-E/MS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC12F683-I/SN
✅ Drop-In📋 Reference alternative (not in catalog)
PIC12HV609-E/SN
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$0.76 / Unit
View Datasheet →PIC12HV609-I/MS Maximum Ratings & Electrical Characteristics
| Core | PIC 8-bit RISC, 14-bit instruction word |
| Program Memory | 1.75 KB (1K x 14) Flash |
| Data RAM | 64 bytes |
| Data EEPROM | 128 bytes |
| Max CPU Frequency | 20 MHz |
| MIPS Performance | 5 MIPS |
| Operating Voltage (HV Regulator) | 2.0 V to user-defined VDD (typ. 5.5 V max) |
| I/O Pins | 6 |
| ADC | 10-bit, 4 channels |
| Timers | 1 x 8-bit (TMR0), 1 x 16-bit (TMR1) |
| PWM Module | ECCP (Enhanced Capture/Compare/PWM), 1 channel |
| Comparator | 1 comparator with selectable hysteresis |
| Internal Oscillator | 8 MHz (HFINTOSC) + 31 kHz (LFINTOSC) |
| High-Voltage Regulator | Internal shunt regulator (HV suffix) |
| Package | MSOP-8 (3.00 mm width) |
| Operating Temperature | -40C to +85C (Industrial 'I') |
| Flash Endurance | 100K erase/write cycles typical |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
PIC12HV609-I/MS Pin Configuration
| Pin 1 | VDD — Positive supply voltage (HV shunt regulator output when used) |
| Pin 2 | GP5/T1CKI/OSC1/CLKIN — General-purpose I/O / Timer1 clock / external clock input |
| Pin 3 | GP4/AN3/T1G/~MCLR~/ICSPCLK — GPIO / ADC input / Timer1 gate / Master Clear / ICSP clock |
| Pin 4 | GP3/~MCLR~/VPP/ICSPDAT — GPIO / MCLR input / Programming voltage / ICSP data |
| Pin 5 | GP2/AN2/T0CKI/INT/COUT/CCP1 — GPIO / ADC / TMR0 clock / external interrupt / comparator output / ECCP |
| Pin 6 | GP1/AN1/CIN-/ICSPCLK — GPIO / ADC input / comparator inverting input / ICSP clock |
| Pin 7 | GP0/AN0/CIN+/ICSPDAT — GPIO / ADC input / comparator non-inverting input / ICSP data |
| Pin 8 | VSS — Ground reference |
Typical Applications
PIC12HV609-I/MS is suitable for 6 applications: 9V / 12V Battery-Powered Sensor Nodes, Brushed DC Fan Speed Control, AC Zero-Cross Detection in White Goods, IR Remote Control Transmitter, Industrial 24V Bus Sensor Interface, Cost-Sensitive Consumer Electronics.
9V / 12V Battery-Powered Sensor Nodes
The PIC12HV609-I/MS is purpose-built for 9V/12V battery-powered sensor nodes because its internal HV shunt regulator allows the MCU to operate directly from a higher-voltage battery through an external current-limiting Zener and resistor. The HV regulator holds VDD at a fixed 5 V level regardless of battery state-of-charge, eliminating the need for an external LDO and reducing BOM by ~$0.05-0.10. The 1.75 KB flash and 64 B RAM are sufficient for periodic sensor reads (temperature, light, motion) and threshold-based wake-up via nanoWatt sleep, where active current at 1 MHz is ~0.4 mA and sleep is ~50 nA, supporting multi-year battery life from a single 9V cell.
Recommended
Brushed DC Fan Speed Control
The PIC12HV609-I/MS drives brushed DC and small 12 V fan motors through its Enhanced CCP (ECCP) module, which generates 10-bit PWM with programmable dead-band control - critical for H-bridge or half-bridge fan drivers. The on-chip comparator can be used for closed-loop tachometer feedback or current limit, while the HV regulator accepts the noisy 12 V fan bus directly. TMR1 (16-bit) drives the PWM period for low-noise 25 kHz operation, and the ADC monitors fan current via a shunt resistor. With a 20 MHz core, the firmware can implement PI control loops well within sub-millisecond loop times.
Recommended
AC Zero-Cross Detection in White Goods
The PIC12HV609-I/MS is well suited to detecting AC mains zero-cross in white-goods appliances (washing machines, dishwashers, refrigerators) where the high-voltage tolerant HV I/O pin can be paired with an external dropping resistor directly to the AC line. The on-chip comparator with hysteresis cleans up the rectified sine wave and triggers an interrupt at every zero-cross, allowing the MCU to synchronize triac firing for heating elements and motor control. The internal 8 MHz HFINTOSC eliminates an external crystal, and the 64 B RAM is sufficient for relay de-bounce state machines. Industrial -40C to +85C operation matches appliance under-cabinet thermal environments.
Recommended
IR Remote Control Transmitter
The PIC12HV609-I/MS is an excellent fit for handheld IR remote transmitters because its 20 MHz core can precisely generate 38 kHz / 40 kHz / 56 kHz carrier waveforms for RC5, NEC, and SIRC protocols, while the HV regulator lets the design run from 9V battery packs used in universal remotes. The ECCP module drives the IR LED with hardware PWM, freeing the core to handle button scanning via interrupt-on-change I/O. With 64 B RAM and 1.75 KB flash, the part can hold multiple protocol tables for universal remote use, and nanoWatt sleep extends shelf life when buttons are not pressed. The MSOP-8 footprint fits inside thin remote enclosures.
Recommended
Industrial 24V Bus Sensor Interface
In industrial 24V PLC and sensor-bus systems, the PIC12HV609-I/MS can be powered directly from the 24V rail through its HV shunt regulator paired with a Zener diode, eliminating the need for an isolated DC-DC. The 6 I/O pins route digital sensor signals, while the 10-bit ADC reads 4-20 mA or 0-10 V analog signals through external scaling resistors. The 20 MHz core and 1.75 KB flash handle MODBUS-RTU slave or IO-Link point-to-point framing. Industrial -40C to +85C rating and the MSOP-8's small PCB footprint make it ideal for DIN-rail sensor modules.
Recommended
Cost-Sensitive Consumer Electronics
For cost-sensitive consumer products such as holiday string lights, USB-powered toys, simple kitchen timers, and novelty gadgets, the PIC12HV609-I/MS offers 1.75 KB flash, 64 B RAM, and 5 I/O (excluding reset) in a sub-$1 BOM footprint. The internal 8 MHz HFINTOSC removes the external crystal, while nanoWatt sleep (50 nA typ) keeps standby power negligible. The HV regulator accepts a wide supply range via simple Zener current limiting, perfect for 3-12 V wall-wart supplies with no regulation. The MSOP-8 occupies ~9 mm² of PCB, fitting even the smallest consumer enclosures.
Recommended
Recommended Products Summary
Engineering reference data for PIC12HV609-I/MS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC12F609-I/MD | PIC12F609-E/MS | PIC12F615-H/MD | PIC12F617-E/MS | PIC12F683-I/SN | PIC12HV609-E/SN |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | MSOP-8 (3.00 mm) | MSOP-8 - same | MSOP-8 - same | MSOP-8 - same | MSOP-8 - same | MSOP-8 - same | MSOP-8 - same |
| Flash Memory | 1.75 KB | 1.75 KB | 1.75 KB | 1.75 KB | 3.5 KB | 3.5 KB | 1.75 KB |
| Data RAM | 64 bytes | 64 bytes | 64 bytes | 64 bytes | 128 bytes | 128 bytes | 64 bytes |
| Max CPU Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| HV Shunt Regulator | Yes (internal) | No | No | No | No | No | Yes (internal) |
| PWM Channels | 1 (ECCP) | 1 | 1 | 2 | 3 | 1 | 1 |
| ADC Resolution | 10-bit, 4 ch | 10-bit, 4 ch | 10-bit, 4 ch | 10-bit, 4 ch | 10-bit, 4 ch | 10-bit, 4 ch | 10-bit, 4 ch |
| Operating Temperature | -40C to +85C (I grade) | -40C to +85C (I grade) | -40C to +125C (E grade) | -40C to +85C (H grade) | -40C to +125C (E grade) | -40C to +85C (I grade) | -40C to +125C (E grade) |
Key Differentiators
- Integrated high-voltage shunt regulator eliminates external LDO (vs PIC12F609-I/MD)
- Same MSOP-8 pinout as the PIC12F family for drop-in scalability (vs PIC12F617-E/MS)
- Industrial temperature grade operation out of the box (vs PIC12HV609-E/SN)
Design Notes
The HV shunt regulator on PIC12HV609-I/MS requires careful current-limit design: an external resistor and Zener diode in series drop the supply voltage to a regulated VDD, and the total current drawn from the HV bus (MCU + external load through VDD) must stay within the device's IZ specification. As a rule of thumb, target 10-30 mA total HV current - enough to bias the regulator but below the limit where the package's 206 C/W theta-JA produces excessive junction temperature. Estimated: at 12V supply, 5V VDD, 20 mA regulator current, dissipation is 140 mW and TJ rise is ~29C above ambient, which is acceptable.
Route the high-current HV shunt resistor trace in a separate analog/digital island from the oscillator and ADC pins. The MSOP-8 thermal pad is absent on this package - all heat must dissipate through the 6 active pins, so VDD and VSS should be connected to generous copper pours. Place the 0.1 µF VDD bypass within 3 mm of pin 1, with a 1 µF bulk capacitor nearby for the HV regulator's transient response. Keep digital switching traces (PWM, ICSP clock) at least 5 mm away from the ADC comparator pins to avoid coupling.
Three common pitfalls when using the PIC12HV609-I/MS: (1) Forgetting the ~1 µs internal voltage stabilization time after enabling HV mode - do not execute code that assumes VDD is stable until at least 5 µs after HV enable. (2) Using GP3 as a general-purpose input without isolating it from the MCLR programming function - GP3 doubles as the MCLR/VPP pin and pulling it low resets the part. (3) Driving the ECCP output above its absolute maximum 5.5 V - if used as a high-side gate driver, level-shift externally.
When using the comparator for AC zero-cross detection, add a 100 ns RC low-pass filter on the input pin to reject fast transients from capacitive coupling on long AC mains leads. The on-chip comparator has selectable hysteresis modes (off, low, medium, high) - the medium setting is appropriate for typical 50/60 Hz zero-cross applications. Place the comparator input trace in a guard ring tied to GND to prevent leakage-induced false triggering in humid environments.
Compliance Information
RoHS and REACH compliant per Microchip's Material Declaration Sheet. Not AEC-Q100 qualified - not intended for automotive under-hood applications.
