PIC16F18444T-I/SO - 8-bit 32MHz 7KB Flash XLP MCU | Microchip
MPN: PIC16F18444T-I/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.85 | $0.85 |
| 10 | $0.78 | $7.80 |
| 100 | $0.7 | $70.00 |
| 500 | $0.62 | $310.00 |
| 1,000 | $0.55 | $550.00 |
PIC16F18444T-I/SO Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory (Flash), volatile data memory (RAM), and a rich set of on-chip peripherals such as timers, ADCs, communication interfaces, and I/O. The 8-bit PIC architecture follows a RISC design with a fixed instruction set, single-cycle execution from Flash (at 32 MHz, most instructions complete in 125 ns), and an orthogonal register model that simplifies assembler and C development. Within the broader hierarchy, an MCU belongs to microcontrollers -> integrated circuits -> semiconductors.
Key features of the PIC16F18444 include a 12-bit ADC with computation (ADCC), two 10-bit PWMs, a 5-bit DAC, a comparator, a complementary waveform generator (CWG), an EUSART, and SPI/I2C peripherals. XLP technology delivers typical run currents below 50 uA/MHz and sleep currents in the nanoampere range, enabling multi-year battery life. The device accepts supplies from 2.3 V to 5.5 V (F suffix), making it compatible with both 3.3 V and 5 V rails.
The PIC16F18444T-I/SO is well suited for sensor signal conditioning, IoT end nodes, low-power wireless sensor interfaces, consumer appliances, and human-machine interface (HMI) front ends. Functional-safety documentation eases IEC 60730 class B certification for white goods. The 12-bit ADCC supports averaging, oversampling, and hardware threshold comparison offloading the CPU.
Designers should review the device header configuration in MPLAB X and use the MSSP for I2C/SPI master or slave roles. Pin remapping on peripheral pin select (PPS) accelerates PCB layout. Always include a 100 nF decoupling capacitor within 3 mm of VDD.
Drop-in alternatives for PIC16F18444T-I/SO — 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 PIC16F18444T-I/SO (same form factor and footprint) — differing in Package, ADC, DAC, Operating Temperature, Program Memory (Flash).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F18444-I/SO
✅ Drop-In✓ In Stock
$0.68 / Unit
View Datasheet →PIC16F18444-E/SO
✅ Drop-In✓ In Stock
$0.95 / Unit
View Datasheet →PIC16F18445-I/SO
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$1.45 / Unit
View Datasheet →PIC16F18345-I/SO
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$1.28 / Unit
View Datasheet →PIC16F18446-I/SO
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$1.08 / Unit
View Datasheet →PIC16F18444T-I/SO Maximum Ratings & Electrical Characteristics
| Core | PIC 8-bit enhanced mid-range |
| CPU Speed | 32 MHz (max) |
| Program Memory | 7 KB (4K x 14 words) Flash |
| Data RAM | 512 B |
| Data EEPROM | 256 B |
| Supply Voltage (VDD) | 2.3 V to 5.5 V (F suffix) |
| Operating Temperature | -40C to +85C (industrial, -I) |
| ADC | 12-bit ADCC with computation |
| DAC | 5-bit DAC |
| PWM Channels | 2 x 10-bit |
| Comparators | Yes |
| CWG | Complementary Waveform Generator |
| EUSART | 1 |
| SPI / I2C (MSSP) | 1 x MSSP |
| I/O Pins | Up to 18 |
| Package | 20-pin SOIC (0.295" / 7.50 mm width) |
| XLP Low-Power | Yes (eXtreme Low Power) |
| Functional Safety (FuSa) | Documentation package available |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
PIC16F18444T-I/SO Pin Configuration
| Pin 1 | RA3/AN3/C1IN+/VREF+ — Bidirectional I/O with analog input, comparator input, and voltage reference |
| Pin 2 | RA4/AN4/C1OUT/T0CKI — Bidirectional I/O with analog input, comparator output, and Timer0 clock input |
| Pin 3 | RA5/AN5/DAC5OUT/SS — Bidirectional I/O with analog input, DAC output, and SPI slave select |
| Pin 4 | RA0/AN0/C2IN0- — Bidirectional I/O with analog input and comparator input |
| Pin 5 | RA1/AN1/C2IN1-/ZCD — Bidirectional I/O with analog input, comparator input, and zero-cross detect |
| Pin 6 | RA2/AN2/C2IN2-/DAC5REF+ — Bidirectional I/O with analog input, comparator input, and DAC reference |
| Pin 7 | VDD — Positive supply voltage (2.3 V to 5.5 V) |
| Pin 8 | VSS — Ground reference |
| Pin 9 | RA7/CLKOUT — Bidirectional I/O with system clock output |
| Pin 10 | RA6/CLKIN/OSC2 — Crystal oscillator output or clock input |
| Pin 11 | RC0/SOSCO — Bidirectional I/O with secondary oscillator output |
| Pin 12 | RC1/SOSCI — Bidirectional I/O with secondary oscillator input |
| Pin 13 | RC2/AN6/CCP1 — Bidirectional I/O with analog input and CCP1 PWM output |
| Pin 14 | RC3/AN7/CCP2 — Bidirectional I/O with analog input and CCP2 PWM output |
| Pin 15 | RC4/AN8/SDA/SDI — Bidirectional I/O with analog input and I2C data or SPI data input |
| Pin 16 | RC5/AN9/SCL/SCK — Bidirectional I/O with analog input and I2C clock or SPI clock |
| Pin 17 | RC6/AN10/TX/CK — Bidirectional I/O with analog input and EUSART TX/CK |
| Pin 18 | RC7/AN11/RX/DT — Bidirectional I/O with analog input and EUSART RX/DT |
| Pin 19 | RB7/DTG/SDO — Bidirectional I/O with data gate and SPI data output |
| Pin 20 | RE3/MCLR/VPP — Master clear (reset) input / programming voltage |
Typical Applications
PIC16F18444T-I/SO is suitable for 7 applications: Battery-Powered IoT Sensor Nodes, Home Appliance Control (IEC 60730 Class B), Automotive Body and Accessory Modules, Industrial Sensor Transmitters, Consumer Remote Controls and HMI, Medical and Wellness Wearables, Power Conversion and Digital Control Loops.
Battery-Powered IoT Sensor Nodes
The PIC16F18444T-I/SO is a strong fit for coin-cell powered IoT sensor nodes thanks to its XLP nanoWatt deep-sleep mode that pulls only a few hundred nanoamps, and its 12-bit ADCC that offloads sensor averaging without waking the CPU. At 32 MHz / 8 MIPS, the device can service a wakeup, take a reading, run a smoothing filter, and return to sleep inside a single millisecond window. The 7 KB Flash comfortably holds a FreeRTOS-style scheduler or a state-machine based firmware for periodic environmental sampling and BLE/Zigbee front-end signaling.
Recommended
Home Appliance Control (IEC 60730 Class B)
The PIC16F18444T-I/SO ships with a Microchip functional safety (FuSa) documentation package supporting IEC 60730 Class B certification for white-goods appliances such as washing machines, dishwashers, and ovens. The CWG peripheral drives triac control for motor/heater phases without external glue logic, while the 12-bit ADCC reads thermistor, pressure, and level sensors. XLP sleep reduces standby power below 100 mW, helping meet EU energy regulations, and the industrial -40C to +85C temperature grade tolerates the harsh thermal environment inside appliance chassis.
Recommended
Automotive Body and Accessory Modules
The PIC16F18444T-I/SO is well suited to non-Powertrain automotive body modules like window lifters, seat controllers, mirror adjusters, and ambient lighting. The 5-bit DAC drives LED dimming curves with hardware smoothing, and the CWG generates complementary PWM for H-bridge half-bridge motor control. The 32 MHz core services LIN-bus frames via the EUSART within tight real-time budgets, while XLP sleep keeps quiescent draw below 100 uA on parked vehicles. For AEC-Q100 qualified variants in SOIC-20, designers migrate to PIC16F18444T-E/SO or PIC16F18444T-I/SO V01 automotive grade options.
Recommended
Industrial Sensor Transmitters
The PIC16F18444T-I/SO powers 4-20 mA loop-powered or IO-Link connected industrial sensor transmitters where stable analog performance is mandatory. The 12-bit ADCC with computation delivers calibrated readings directly to the SPI/I2C output chain without CPU intervention, while the on-chip 5-bit DAC supports loop-test modes or voltage-output transmitter outputs. The wide 2.3 V to 5.5 V supply range accommodates the 24 V loop down to a small local LDO drop, and the -40C to +85C industrial grade handles outdoor and factory-floor environments.
Recommended
Consumer Remote Controls and HMI
The PIC16F18444T-I/SO is a natural fit for IR/RF remote controls, smart-home keypads, and small HMI boards where cost and battery life dominate. The CWG generates 38 kHz IR carrier modulation in hardware without timer overhead, while the 12-bit ADCC handles touch/proximity sensing electrodes through the on-chip comparators. EUSART plus MSSP simultaneously drive an IR LED driver and a BLE pairing module, and XLP sleep extending coin-cell life beyond five years keeps the BOM cost under USD 1 for the entire remote.
Recommended
Medical and Wellness Wearables
The PIC16F18444T-I/SO supports medical-grade wearable designs such as pulse oximetry patches, glucose monitors, and digital thermometers. The 12-bit ADCC reads photodiode signals from heart-rate or SpO2 sensors, while the on-chip DAC drives the sensor LED with stable bias. Functional-safety documentation reduces IEC 62304 software-compliance overhead for Class B devices, and XLP sleep modes keep total system draw below 50 uA between samples. The 20-pin SOIC package is friendly to flex-PCB assembly used in disposable medical patches.
Recommended
Power Conversion and Digital Control Loops
The PIC16F18444T-I/SO can serve as a digital controller for non-isolated DC-DC and LED-driver subsystems in the 1-50 W class, leveraging the CWG for synchronous rectification timing and the 12-bit ADCC for voltage/current feedback sampling. The 32 MHz / 8 MIPS throughput handles a 100 kHz control loop with proportional-integral math in less than 30% of CPU bandwidth, leaving headroom for housekeeping tasks such as PMBus telemetry via the EUSART. XLP sleep supports burst-mode light-load efficiency per EU Ecodesign directives.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F18444T-I/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F18444-I/SO | PIC16F18444-E/SO | PIC16F18445-I/SO | PIC16F18345-I/SO |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 20-SOIC | 20-SOIC - same | 20-SOIC - same | 20-SOIC - same | 20-SOIC - same |
| Flash Program Memory | 7 KB | 7 KB | 7 KB | 14 KB | 14 KB |
| RAM | 512 B | 512 B | 512 B | 1 KB | 1 KB |
| Max CPU Frequency | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| ADC | 12-bit ADCC | 12-bit ADCC | 12-bit ADCC | 12-bit ADCC | 10-bit ADC (no ADCC) |
| CWG Peripheral | Yes | Yes | Yes | Yes | No |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +125C | -40C to +85C | -40C to +85C |
| Approx. Unit Price (qty 1000) | USD 0.55 | USD 0.50 | USD 0.62 | USD 0.62 | USD 0.62 |
Key Differentiators
- Higher ADC resolution with hardware computation (vs PIC16F18345-I/SO)
- CWG peripheral for complementary PWM (vs PIC16F18345-I/SO)
- Functional-safety documentation package (vs PIC16F18445-I/SO)
Design Notes
Place a 100 nF ceramic decoupling capacitor within 3 mm of the VDD pin, and add a bulk 1-10 uF tantalum or ceramic cap on the same supply rail. Per Microchip datasheet DS40001943D, decoupling minimizes VDD droop when peripherals and the HFINTOSC switch modes. Use VREG to internal regulator output low-ESR capacitor ratings as specified.
Do not leave MCLR floating - tie RE3/MCLR through a 10 kohm pull-up to VDD, or configure as a digital input with the internal weak pull-up enabled in the configuration words. Floating MCLR on the PIC16F18444T-I/SO can cause spurious resets or failure to start under low-voltage or noisy conditions.
Reserve an ICSP header footprint (5-pin: VDD, VSS, ICSPDAT, ICSPCLK, MCLR) on every PIC16F18444T-I/SO board even for production - this enables quick firmware updates and Microchip programming tools without reworking. Route the ICSP signals away from high-current switching nodes to prevent programming failure in noisy environments.
When using the CWG peripheral for complementary PWM outputs on the PIC16F18444T-I/SO, place the dead-time generator settings appropriately to prevent shoot-through in the external half-bridge. Per Microchip datasheet DS40001943D, available dead-time values are configured via the CWGxDBR register. Keep the PIC adjacent to the gate driver IC with short, parallel gate traces for best timing symmetry.
Compliance Information
RoHS/REACH compliance, lead-free matte-tin finish, halogen-free, conflict-minerals compliant per Microchip standard regulatory disclosures. IEC 60730 Class B functional-safety documentation package is available separately; AEC-Q100 qualification applies to dedicated automotive variants, not the standard -I SOIC grade.
