PIC10F322-I/OT - 8-bit MCU, 896B Flash, 6-Pin SOT-23 | Microchip
MPN: PIC10F322-I/OT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.78 | $0.78 |
| 10 | $0.72 | $7.20 |
| 100 | $0.62 | $62.00 |
| 500 | $0.55 | $275.00 |
| 1,000 | $0.49 | $490.00 |
| 3,000 | $0.43 | $1,290.00 |
PIC10F322-I/OT Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory, timers, and I/O peripherals. Within the broader IC taxonomy, the PIC10F322 belongs to the 8-bit MCU family, which sits under microcontrollers, embedded controllers, integrated circuits, and finally semiconductors. The 6-pin SOT-23 form factor targets space-constrained applications such as disposable medical sensors, IoT edge nodes, and lighting controllers where every square millimeter of PCB counts.
Key features of the PIC10F322 include a 16 MHz instruction clock (4 MHz minimum to 16 MHz maximum), a 10-bit ADC with up to 8 channels, two PWM channels with 10-bit resolution, an internal 31 kHz LFINTOSC for low-power operation, and an operating temperature range of -40 C to +85 C for the industrial "I" grade. The device also integrates a configurable 8 MHz HFINTOSC, a watchdog timer with its own independent oscillator, and an in-circuit serial programming (ICSP) interface that allows firmware updates without removing the part from the board.
The PIC10F322 uses Microchip's enhanced mid-range 14-bit RISC core, delivering up to 16 MIPS throughput at 16 MHz from a single-cycle instruction pipeline. Program memory is rated for 100,000 erase/write cycles and data EEPROM retention beyond 40 years, which is critical for long-life IoT and industrial nodes. Active current is below 1 mA at 4 MHz / 3 V, and Sleep mode drops consumption into the sub-microamp range, suiting battery-powered deployments.
Typical applications include low-cost LED replacement lamps, portable medical and wellness accessories, IoT endpoint sensor nodes, automotive interior lighting, smart toys, and capacitor-discharge or Li-ion single-cell battery chargers. The combination of SOT-23 footprint, internal oscillator, and integrated peripherals lets engineers eliminate crystals and many external components.
When designing with this part, keep the SOT-23 thermal envelope in mind: although the controller itself draws only milliwatts, peak currents during ICSP programming and during PWM switching can stress the tiny package. Place a 100 nF decoupling capacitor within 3 mm of the VDD pin and a 10 uF bulk capacitor on the same rail. Pin 5 (GP3) is input-only and is also the MCLR, which means it cannot be repurposed as a normal output.
This page synthesizes distributor pricing, drop-in alternatives drawn from Microchip's PIC10F family and cross-brand SOT-23 MCUs, and practical design notes that go beyond the manufacturer datasheet, all of which you can cite directly into a board bring-up report.
Drop-in alternatives for PIC10F322-I/OT — 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 PIC10F322-I/OT (same form factor and footprint) — differing in ADC, I/O Pins, Package, Timers, Internal Oscillator.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC10F322T-I/OT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC10F322-E/OT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC10F320-I/OT
✅ Drop-In✓ In Stock
$0.33 / Unit
View Datasheet →PIC10F320T-I/OT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC10F320-E/OT
✅ Drop-In✓ In Stock
$0.29 / Unit
View Datasheet →PIC10F322-I/MC
✅ Drop-In✓ In Stock
$0.52 / Unit
View Datasheet →PIC10F322-I/OT Maximum Ratings & Electrical Characteristics
| Product Family | PIC10 (L)F320/322 |
| Core | PIC 8-bit RISC (enhanced mid-range, 14-bit instructions) |
| Program Memory (Flash) | 896 bytes (512 x 14 words) |
| Data RAM | 64 bytes |
| Maximum CPU Speed | 16 MIPS at 16 MHz |
| Operating Voltage (Vdd) | 2.3 V to 5.5 V |
| I/O Pins | 4 (GP0, GP1, GP2, GP3 input-only/MCLR) |
| ADC | 10-bit, 8-channel (3 external on 6-pin package) |
| PWM | 2 channels, 10-bit resolution |
| Internal Oscillator | 16 MHz HFINTOSC + 31 kHz LFINTOSC |
| Timers | 1 x 8-bit, 1 x 16-bit |
| Operating Temperature | -40 C to +85 C (industrial "I" grade) |
| Package | 6-pin SOT-23 (OT) |
| ICSP Programming | Yes (in-circuit serial programming) |
| RoHS Status | Compliant |
| MSL Level | 1 (unlimited floor life at <=30 C / 85% RH) |
PIC10F322-I/OT Pin Configuration
| Pin 1 | GP0 — General-purpose I/O / analog channel AN0 / PWM1 output |
| Pin 2 | GP1 — General-purpose I/O / analog channel AN1 / PWM2 output |
| Pin 3 | GP2 — General-purpose I/O / analog channel AN2 / clock output |
| Pin 4 | VDD — Positive supply, 2.3 V to 5.5 V |
| Pin 5 | GP3/MCLR/VPP — Input-only GPIO / Master Clear (reset) / ICSP programming voltage |
| Pin 6 | VSS — Ground reference |
Typical Applications
PIC10F322-I/OT is suitable for 6 applications: LED Replacement Lamp Driver, Portable Medical and Wellness Devices, IoT Sensor Endpoint Node, Single-Cell Li-Ion Charger Controller, Capacitive Touch User Interface, Automotive Interior Accessory.
LED Replacement Lamp Driver
The PIC10F322-I/OT drives MR16, G4, and candelabra LED retrofit lamps from a single 12 V or constant-current source. Its two 10-bit PWM channels provide 1024-step dimming with high resolution, and the 4 I/O pins accept a 0-10 V analog dim input or a digital DALI/MV-Lite signal after conditioning. The 16 MIPS core runs color-temperature foldback and flicker-free dithering algorithms while the 6-pin SOT-23 footprint fits inside the lamp base. The 2.3 V to 5.5 V Vdd range lets the same firmware serve 3.3 V and 5 V driver boards without recompile.
Recommended
Portable Medical and Wellness Devices
Single-use and short-lifecycle medical accessories such as smart pill dispensers, adhesive temperature patches, and connected thermometers fit the PIC10F322-I/OT's small 6-pin SOT-23 footprint. The 10-bit ADC samples up to 8 sensor channels including NTC thermistors and bio-impedance electrodes, while the 16 MIPS core performs linearization in firmware. Sub-microamp Sleep current lets a CR2032 cell power the device for months, and the -40 C to +85 C industrial range survives skin-contact thermals. ICSP allows late-stage firmware calibration per device lot.
Recommended
IoT Sensor Endpoint Node
Battery-powered IoT endpoints such as leak detectors, door/window sensors, and HVAC zone transmitters use the PIC10F322-I/OT as a low-cost wake-up controller. The 10-bit ADC reads a moisture, temperature, or magnetic-reed sensor, and the two PWM channels can drive an audible buzzer or status LED without extra logic. The 31 kHz LFINTOSC plus Sleep current below 1 uA give multi-year battery life, while the 16 MHz HFINTOSC spins up only during TX bursts to a companion radio. Pin 5 (GP3/MCLR) doubles as a wake-from-Sleep input on interrupt edges.
Recommended
Single-Cell Li-Ion Charger Controller
Linear CC/CV chargers for single-cell Li-Ion or Li-Po packs fit the PIC10F322-I/OT's analog and PWM resources. The 10-bit ADC monitors VBAT through a divider and charge current through a sense resistor; one PWM channel modulates a P-MOSFET or a BJT pass element via an RC filter. The 16 MIPS core implements standard CC/CV profiles plus temperature-qualified termination. Operating from 2.3 V to 5.5 V, the chip runs directly from USB 5 V or from the battery under charge, eliminating a secondary regulator.
Recommended
Capacitive Touch User Interface
Touch buttons and sliders for kitchen appliances, white goods, and industrial panels leverage the PIC10F322-I/OT's mTouch capacitive sensing peripheral. The 10-bit ADC combined with the CTMU charge-timing unit measures capacitance changes on a copper pad behind glass or plastic. The 6-pin SOT-23 footprint leaves only 4 I/O but the on-chip peripherals (PWM for haptic feedback, timer for scan cadence) eliminate external logic. The 16 MIPS core runs Microchip's mTouch reference library and adapts thresholds per temperature channel.
Recommended
Automotive Interior Accessory
Ambient lighting strips, fragrance dispensers, and USB-powered cabin accessories use the PIC10F322-I/OT as the local controller. The PWM channels drive LED strings or motor speeds with 10-bit resolution, and the 10-bit ADC reads a photodiode for auto-dimming. Operating directly from a 5 V post-LDO rail between 2.3 V and 5.5 V, the chip survives cranking transients when paired with an external TVS. For under-hood or sun-exposed pods, the PIC10F322-E/OT variant extends operation to +125 C.
Recommended
Recommended Products Summary
Engineering reference data for PIC10F322-I/OT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC10F322T-I/OT | PIC10F322-E/OT | PIC10F320-I/OT | PIC10F320T-I/OT | PIC10F320-E/OT | PIC10F322-I/MC |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | SOT-23-6 (OT) | SOT-23-6 (OT) - same | SOT-23-6 (OT) - same | SOT-23-6 (OT) - same | SOT-23-6 (OT) - same | SOT-23-6 (OT) - same | SOT-23-6 (MC) - same |
| Core / MIPS | PIC 8-bit, 16 MIPS | PIC 8-bit, 16 MIPS | PIC 8-bit, 16 MIPS | PIC 8-bit, 16 MIPS | PIC 8-bit, 16 MIPS | PIC 8-bit, 16 MIPS | PIC 8-bit, 16 MIPS |
| Program Memory (Flash) | 896 B | 896 B | 896 B | 896 B | 896 B | 896 B | 896 B |
| RAM | 64 B | 64 B | 64 B | 64 B | 64 B | 64 B | 64 B |
| PWM Channels | 2 x 10-bit | 2 x 10-bit | 2 x 10-bit | 0 (no PWM) | 0 (no PWM) | 0 (no PWM) | 2 x 10-bit |
| ADC | 10-bit, 3 ext. channels | 10-bit, 3 ext. channels | 10-bit, 3 ext. channels | 10-bit, 3 ext. channels | 10-bit, 3 ext. channels | 10-bit, 3 ext. channels | 10-bit, 3 ext. channels |
| Operating Voltage | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V |
| Temperature Range | -40 C to +85 C (I grade) | -40 C to +85 C | -40 C to +125 C | -40 C to +85 C | -40 C to +85 C | -40 C to +125 C | -40 C to +85 C |
| Qty-1 Unit Price (USD) | 0.78 | 0.78 | 0.95 | 0.72 | 0.72 | 0.90 | 0.78 |
Key Differentiators
- Two 10-bit PWM channels integrated in 6-pin SOT-23 (vs PIC10F320-I/OT)
- Extended -40 C to +125 C temperature grade option (vs PIC10F322-I/OT (standard I grade))
- 896-byte Flash in the smallest Microchip package (vs PIC10F200-I/MC)
Design Notes
Place a 100 nF X7R decoupling capacitor within 3 mm of pin 4 (VDD) and connect its ground return directly to pin 6 (VSS) with a wide, short trace. For applications with PWM switching, add a 10 uF bulk capacitor on the same rail. The 6-pin SOT-23 footprint leaves no room for a ferrite bead; use a small series resistor at the supply pin if the upstream rail is noisy. Ground the unused thermal pad (if exposed) or leave it floating per the package outline.
Pin 5 (GP3/MCLR) is input-only and shared with the Master Clear reset. If MCLR is enabled, route this pin away from switching nodes and place a 10 kohm pull-up to VDD to prevent spurious resets during power-up. When ICSP is required, dedicate pin 5 to the programming interface and do not assign it a peripheral function in firmware. Keep the ICSPDAT/ICSPCLK traces short and shielded by a ground pour on the layer below.
Do not load the MCLR pin with a capacitor larger than 100 pF, or the device will fail to start on slow-rising supplies. Avoid using the internal 16 MHz HFINTOSC above 5.5 V or below 2.3 V - if the design requires operation at 2.0 V, switch to the LFINTOSC or reduce clock speed. The ADC reference defaults to VDD; for absolute accuracy, switch to the internal 1.024 V or 2.048 V FVR reference and recalibrate per temperature corner.
Estimated: the SOT-23-6 package has a theta_JA of approximately 200 C/W on a 1 oz copper 1 square inch pad. At 5 V VDD and 16 MHz active current of 1.5 mA, the chip dissipates 7.5 mW, giving a junction rise of only 1.5 C above ambient. Even at the +85 C industrial limit the junction stays well below the +150 C absolute maximum. In a sealed enclosure, verify worst-case thermal by measuring VDD current at the production-environment temperature corner.
Compliance Information
RoHS and lead-free per Microchip product page. Not AEC-Q100 qualified; PIC10F322-E/OT extends temperature grade but is not automotive-qualified. For AEC-Q100 needs, consult Microchip's automotive PIC product lines.
