PIC16F18426T-I/ST - 8-Bit XLP MCU, 28KB Flash, 32MHz, 14-TSSOP
MPN: PIC16F18426T-I/ST β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.55 | $1.55 |
| 10 | $1.39 | $13.90 |
| 100 | $1.18 | $118.00 |
| 500 | $1.05 | $525.00 |
| 1,000 | $0.95 | $950.00 |
| 3,000 | $0.85 | $2,550.00 |
PIC16F18426T-I/ST Overview
A microcontroller is a single-chip computer that integrates a CPU, non-volatile program memory (Flash), volatile data memory (RAM), analog and digital peripherals, and communication interfaces on one die. Within the broader semiconductor taxonomy, a microcontroller belongs to the integrated-circuit family, and the 8-bit PIC16F subgroup falls under the Microchip proprietary MIPS-like CPU architecture. XLP technology refers to nanoWatt-class sleep currents and active power management, enabling battery-operated designs that must run for years from a single cell.
Key features of the PIC16F18426T-I/ST include a 12-bit ADCC (Analog-to-Digital Converter with Computation), two PWMs with complementary waveform generation, a 5-bit DAC, two comparators, a CWG (Complementary Waveform Generator), and configurable logic cells. Communication peripherals cover EUSART (RS-232/RS-485 capable), SPI, and I2C. The CIP (Core Independent Peripherals) architecture allows peripherals to operate without CPU intervention, freeing the core for application tasks.
Typical applications include IoT sensor nodes, low-power wireless endpoints, consumer appliances, battery-powered instrumentation, LED lighting controllers, and automotive body electronics (non-safety). The TSSOP-14 footprint keeps the part compatible with hand-soldered prototypes and high-density SMT assemblies. Designers should review the device header file and the MPLAB X IDE configuration for clock, watchdog, and pin-mapping setup.
Drop-in alternatives for PIC16F18426T-I/ST β 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 PIC16F18426T-I/ST (same form factor and footprint) β differing in ADC, Comparators, Family, Operating Temperature, Package.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
PIC16F18425T-I/ST
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
PIC16F18426-I/ST
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
PIC16F18424T-I/ST
β Drop-In β οΈ εζ°εΎ ιͺθ―β In Stock
$0.81 / Unit
View Datasheet βPIC16F18325T-I/ST
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
PIC16F18426T-I/ST Maximum Ratings & Electrical Characteristics
| Family | PIC16(L)F184xx |
| Core | 8-bit PIC16 |
| Maximum CPU Frequency | 32 MHz |
| Program Memory (Flash) | 28 KB (16K x 14 words) |
| Data SRAM | 2 KB |
| Operating Voltage Range | 1.8 V to 5.5 V |
| ADC | 12-bit ADCC (Analog-to-Digital Converter with Computation) |
| DAC | 5-bit DAC |
| Comparators | 2 |
| PWM Outputs | 2 (with CWG) |
| Communication | EUSART, SPI, I2C |
| Core Independent Peripherals (CIP) | Yes (CLC, CWG, ADCC) |
| Package | 14-pin TSSOP |
| Operating Temperature | -40C to +85C (Industrial, 'I') |
| Packaging | Tape and Reel ('T') |
| Functional Safety (FuSa) | Yes (per Microchip product page) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
PIC16F18426T-I/ST Pin Configuration
| Pin 1 | RA5 β Bidirectional I/O / T1G / PWM3 output |
| Pin 2 | RA4 β Bidirectional I/O / AN3 / DAC1OUT1 |
| Pin 3 | RA3 β Bidirectional I/O / AN2 / VREF+ / DAC1REF+ |
| Pin 4 | RA2 β Bidirectional I/O / AN1 / DAC1OUT2 / ZCD |
| Pin 5 | RA1 β Bidirectional I/O / AN0 / C1IN0- / ICSPCLK |
| Pin 6 | RA0 β Bidirectional I/O / ICSPDAT |
| Pin 7 | VSS β Ground reference |
| Pin 8 | RA7 β Bidirectional I/O / CLKIN / OSC1 |
| Pin 9 | RA6 β Bidirectional I/O / CLKOUT / OSC2 |
| Pin 10 | RC0 β Bidirectional I/O / SOSCO / AN4 |
| Pin 11 | RC1 β Bidirectional I/O / SOSCI / AN5 |
| Pin 12 | RC2 β Bidirectional I/O / AN6 / CWG1FLT |
| Pin 13 | VDD β Positive power supply |
| Pin 14 | RC3 β Bidirectional I/O / AN7 / CWG1IN / PWM4 |
Typical Applications
PIC16F18426T-I/ST is suitable for 6 applications: Battery-Powered IoT Sensor Node, Consumer Appliance Control Board, LED Lighting Controller, Portable Medical Monitoring Device, Automotive Body Electronics Module (Non-Safety), Industrial Sensor Transmitter (4-20 mA).
Battery-Powered IoT Sensor Node
The PIC16F18426T-I/ST is well suited to battery-powered IoT sensor nodes thanks to its XLP nanoWatt sleep modes that drop quiescent current to the microamp range. The 32 MHz CPU handles protocol stacks and the 28 KB Flash accommodates over-the-air firmware update logic. The 12-bit ADCC with computation hardware offloads sensor averaging and threshold detection, letting the CPU sleep while the CIP autonomously wakes on ADC thresholds. Designers place a 32.768 kHz crystal on SOSCO/SOSCI for RTC timing, then poll the sensor at sub-Hz intervals to extend coin-cell life beyond one year. The 14-pin TSSOP footprint also keeps the PCB smaller than 10 mm square for wearable form factors.
Recommended
Consumer Appliance Control Board
In consumer appliance control boards (coffee machines, blenders, smart kettles), the PIC16F18426T-I/ST delivers responsive user-interface handling through its 32 MHz CPU and 2 KB SRAM while keeping BoM cost low. The CWG peripheral produces complementary PWM signals for triac-style phase control of heater elements, and the 12-bit ADCC reads NTC thermistors to regulate temperature. With EUSART driving a 2.4 GHz wireless module, the same firmware can support both standalone and Wi-Fi-connected variants. The 14-pin TSSOP and industrial temperature grade suit the warm interior of an enclosed appliance where ambient may approach 70 C during normal operation.
Recommended
LED Lighting Controller
LED lighting controllers benefit from the PIC16F18426T-I/ST's CWG (Complementary Waveform Generator) and 16-bit PWM resolution for smooth dimming curves. The 12-bit ADCC reads ambient light sensors and potentiometers to set brightness with 4096-step resolution across the human-perceivable range. The 5-bit DAC drives a constant-current reference for high-brightness LED strings, while the comparators implement zero-cross detection for triac-dimming retrofit bulbs. With 28 KB Flash the firmware can host multi-zone lighting protocols (DMX, 0-10V analog, or proprietary) without external memory, and the XLP sleep modes reduce standby power below 50 mW for energy-star rated fixtures.
Recommended
Portable Medical Monitoring Device
Portable medical monitoring devices (pulse oximeters, blood-pressure cuffs, glucose meters) leverage the PIC16F18426T-I/ST's XLP technology to run weeks from AAA cells while the 12-bit ADCC digitizes photodiode or pressure-sensor waveforms. The CIP architecture lets the CWG drive a PWM pump motor and the ADCC sample the pressure sensor simultaneously without CPU wakeup, critical for ISO 60601 EMI-immune designs. Functional-Safety (FuSa) documentation support from Microchip aids IEC 62304 risk-file generation for SaMD Class A and B. The 14-pin TSSOP occupies minimal PCB real estate and the industrial -40 C to +85 C grade handles refrigerated drug-storage transit conditions.
Recommended
Automotive Body Electronics Module (Non-Safety)
For non-safety automotive body modules (window lifts, mirror adjusters, ambient lighting), the PIC16F18426T-I/ST's -40 C to +85 C industrial grade and EUSART with LIN-compatible framing handle in-vehicle networks comfortably. The CWG produces H-bridge PWM for window-lift motors, while the 12-bit ADCC reads position-feedback potentiometers with 1 mm resolution. Designers often add a PIC16F18446 as an upgrade path for richer CAN-LIN body controllers, but the 18426 is the cost-optimized TSSOP-14 fit. Note: this part is NOT AEC-Q100 qualified; for safety-relevant ECUs choose AEC-Q100 sibling parts or add external supervision.
Recommended
Industrial Sensor Transmitter (4-20 mA)
Wired 4-20 mA industrial sensor transmitters use the PIC16F18426T-I/ST's 12-bit ADCC and EUSART to digitize a bridge sensor and modulate loop current with 0.1% accuracy. The XLP sleep modes combined with 32 MHz burst processing keep average loop current below 3.5 mA, leaving 16 mA headroom for the sensor signal. The 14-pin TSSOP footprint allows the entire transmitter to fit in a 30 mm diameter IP67 head, and the -40 C to +85 C industrial grade operates in unheated outdoor enclosures. HART protocol stacks fit in 28 KB Flash with margin for proprietary calibration constants stored in EEPROM emulation.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F18426T-I/ST β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F18425T-I/ST | PIC16F18426-I/ST | PIC16F18424T-I/ST | PIC16F18325T-I/ST |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 14-pin TSSOP | 14-pin TSSOP - same | 14-pin TSSOP - same | 14-pin TSSOP - same | 14-pin TSSOP - same |
| Program Memory (Flash) | 28 KB | 14 KB | 28 KB | 7 KB | 14 KB |
| Data SRAM | 2 KB | 1 KB | 2 KB | 512 B | 1 KB |
| ADC Resolution | 12-bit ADCC | 12-bit ADCC | 12-bit ADCC | 12-bit ADCC | 10-bit ADC |
| CWG (Complementary Waveform Generator) | Yes | Yes | Yes | Yes | No |
| Functional Safety (FuSa) | Yes | Yes | Yes | Yes | No |
| Packaging Format | Tape & Reel | Tape & Reel | Tube | Tape & Reel | Tape & Reel |
Key Differentiators
- 28 KB Flash plus 12-bit ADCC computation hardware in 14-pin TSSOP (vs PIC16F18325T-I/ST)
- CWG peripheral for complementary PWM motor drive (vs PIC16F18325T-I/ST)
- Functional Safety (FuSa) documentation support (vs PIC16F18325T-I/ST)
Design Notes
The PIC16F18426T-I/ST operates from 1.8 V to 5.5 V and supports XLP sleep modes with nanoWatt quiescent current. For battery applications, place a 100 nF decoupling capacitor within 3 mm of the VDD pin (pin 13) and a 10 uF bulk capacitor on the supply rail. The MCU retains RAM down to about 1.5 V in sleep mode; verify the regulator's dropout under load to avoid unintended brownout resets during transmit bursts in wireless designs.
TSSOP-14 has 0.65 mm pitch, which is at the limit for hand-soldering and standard 6-mil PCB trace/space. Use a 4-layer stackup with a continuous ground plane under the IC to provide a low-impedance return path for the 32 MHz CPU harmonics. Keep the ICSP programming header (RA0/RA1) accessible on the PCB edge; Microchip's MPLAB ICD 4 and PICkit 4 use these two pins plus VDD/VSS for in-circuit programming.
Always set the CONFIG words explicitly in source code rather than relying on factory defaults. The 18426 family defaults to internal HFINTOSC; if your design depends on crystal accuracy, fuse the FOSC bits for HS or XT mode and add a 1 M-ohm parallel resistor across the crystal to damp start-up transients. Watch out for RA0/RA1 also being the ICSP pins - assign them carefully if using high-impedance analog sensors, since the ICSP pull-ups can disturb readings.
For SPI buses running above 4 MHz, keep trace lengths under 50 mm and add 33 ohm series resistors at the driver pins to damp reflections. The PIC16F18426T-I/ST supports SPI clock rates up to 8 MHz in master mode (FOSC/4). For I2C, populate 4.7 k pull-ups on both SDA and SCL and verify rise-time with an oscilloscope; long cables or large multi-drop buses may need 2.2 k pull-ups and reduced speed to 100 kHz Standard mode.
Compliance Information
RoHS and REACH compliant per Microchip product page. NOT AEC-Q100 qualified; for automotive safety applications choose AEC-Q100-qualified sibling parts or add external supervision. Lead-free and halogen-free per Microchip material declarations.
