PIC16F18456-I/SP - 8-bit 32MHz XLP MCU 28KB Flash 28-SPDIP | Microchip
MPN: PIC16F18456-I/SP β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.78 | $1.78 |
| 10 | $1.62 | $16.20 |
| 100 | $1.41 | $141.00 |
| 500 | $1.21 | $605.00 |
| 1,000 | $1.07 | $1,070.00 |
PIC16F18456-I/SP Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash/ROM), working memory (RAM), and a rich set of peripherals (ADCs, timers, communication interfaces) onto one die. The PIC16F18456 belongs to the eXtreme Low-Power (XLP) family, which targets battery-powered and energy-harvesting designs. Within the broader taxonomy it sits as: 8-bit MCU -> microcontroller -> embedded processor -> semiconductor IC.
Key features include 32 MHz max CPU clock, 28 KB Flash, 2 KB RAM, 256 bytes EEPROM, 12-bit ADC with Computation (ADCC), 2x PWM with Complementary Waveform Generator (CWG), DAC, comparator, EUSART, and 2x SPI/I2C. Core Independent Peripherals (CIPs) handle tasks in hardware without waking the CPU, reducing power consumption. XLP technology delivers sub-uA sleep currents for battery longevity.
Architecturally the device uses a 14-bit instruction word RISC core (16K x 14 = 28 KB Flash addressing) with a hardware multiply and single-cycle instruction execution. The 12-bit ADCC includes averaging, burst averaging, and threshold comparisons; the CWG provides complementary outputs with programmable dead-band for synchronous motor control.
Typical applications include IoT sensor nodes, consumer appliance controls, industrial sensor interfaces, low-power remote controls, and battery-operated medical devices. The combination of CIPs and XLP suits designs that must wake, sample, and return to deep sleep rapidly. A key design consideration: the SPDIP package is suitable for prototypes, hand-soldered prototypes, and educational use; for volume production choose the SOIC (PIC16F18456-I/SO), SSOP (PIC16F18456-E/SS), or QFN (PIC16F18456-I/STX) variants for smaller PCB footprint.
Drop-in alternatives for PIC16F18456-I/SP 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 PIC16F18456-I/SP (same form factor and footprint) β differing in ADC, Core Architecture, MSL Level, PWM.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
PIC16F18455-I/SP
β Drop-In β οΈ εζ°εΎ ιͺθ―β In Stock
$1.62 / Unit
View Datasheet βPIC16F18446-I/SP
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
PIC16F18445-I/SP
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
PIC16F18346-I/SP
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
PIC16F18345-I/SP
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
PIC16F18456-I/SP Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit PIC16 RISC |
| CPU Core | PIC16F |
| Program Memory Type | Flash |
| Program Memory Size | 28 KB (16K x 14) |
| RAM | 2 KB |
| EEPROM | 256 bytes |
| Maximum CPU Clock | 32 MHz |
| Instruction Word Width | 14 bits |
| Operating Voltage Range | 2.3 V to 5.5 V |
| Operating Temperature Range | -40C to +85C (Industrial) |
| Package Type | 28-pin SPDIP (Skinny Plastic DIP) |
| Mounting Type | Through-Hole |
| ADC | 12-bit ADCC with Computation |
| PWM | 2x with Complementary Waveform Generator (CWG) |
| Communication Interfaces | EUSART, 2x SPI/I2C |
| Peripherals | DAC, Comparator, CWG, CIPs |
| Low-Power Technology | XLP (eXtreme Low-Power) |
| MSL Level | 1 (unlimited) |
| RoHS Status | Compliant |
PIC16F18456-I/SP Pin Configuration
| Pin 1 | VDD β Positive supply voltage (2.3V to 5.5V) |
| Pin 2 | RA0/ANA0 β GPIO/Analog input (Port A, pin 0) |
| Pin 3 | RA1/ANA1 β GPIO/Analog input (Port A, pin 1) |
| Pin 4 | RA2/ANA2 β GPIO/Analog input (Port A, pin 2) |
| Pin 5 | RA3/ANA3/VREF+ β GPIO/Analog input/Positive reference voltage |
| Pin 6 | RA4/ANA4 β GPIO/Analog input (Port A, pin 4) |
| Pin 7 | RA5/ANA5 β GPIO/Analog input (Port A, pin 5) |
| Pin 8 | RA6/ANA6 β GPIO/Analog input (Port A, pin 6) |
| Pin 9 | RA7/ANA7 β GPIO/Analog input (Port A, pin 7) |
| Pin 10 | RB0/ANB0 β GPIO/Analog input (Port B, pin 0) |
| Pin 11 | RB1/ANB1 β GPIO/Analog input (Port B, pin 1) |
| Pin 12 | RB2/ANB2 β GPIO/Analog input (Port B, pin 2) |
| Pin 13 | RB3/ANB3 β GPIO/Analog input (Port B, pin 3) |
| Pin 14 | VSS β Ground reference |
| Pin 15 | VSS β Ground reference |
| Pin 16 | RB4 β GPIO (Port B, pin 4) |
| Pin 17 | RB5 β GPIO (Port B, pin 5) |
| Pin 18 | RB6/ICSPCLK β GPIO/ICSP clock |
| Pin 19 | RB7/ICSPDAT β GPIO/ICSP data |
| Pin 20 | RC0 β GPIO (Port C, pin 0) |
| Pin 21 | RC1 β GPIO (Port C, pin 1) |
| Pin 22 | RC2 β GPIO (Port C, pin 2) |
| Pin 23 | RC3 β GPIO (Port C, pin 3) |
| Pin 24 | RC4 β GPIO (Port C, pin 4) |
| Pin 25 | RC5 β GPIO (Port C, pin 5) |
| Pin 26 | RC6 β GPIO (Port C, pin 6) |
| Pin 27 | RC7 β GPIO (Port C, pin 7) |
| Pin 28 | VDD β Positive supply voltage (2.3V to 5.5V) |
Typical Applications
PIC16F18456-I/SP is suitable for 6 applications: IoT Sensor Nodes, Consumer Appliance Controls, Industrial Sensor Interfaces, Low-Power Remote Controls, Battery-Operated Medical Devices, Motor Control and PWM Subsystems.
IoT Sensor Nodes
The PIC16F18456-I/SP is well suited for battery-powered IoT sensor nodes where the XLP technology's sub-uA sleep current extends battery life, while the 12-bit ADCC on-chip simplifies analog front-end design. With 28 KB Flash and 2 KB RAM the device easily fits typical LoRaWAN or BLE sensor firmware, and CIPs (Core Independent Peripherals) let ADCC threshold comparisons and CWG operations run without waking the CPU - critical for multi-year coin-cell deployments. Operating from 2.3V to 5.5V supports direct 2x AA cell use.
Recommended
Consumer Appliance Controls
In consumer appliance controls, the PIC16F18456-I/SP provides the GPIOs, timer-based PWMs, and ADC channels needed for small kitchen appliances, white goods user interfaces, and motor-control subsystems. The Complementary Waveform Generator (CWG) outputs synchronous PWMs with programmable dead-band suitable for half-bridge motor drives, while the on-chip 12-bit ADCC reads temperature, current, and position sensors. The 28-SPDIP package simplifies hand-rework in appliance service depots.
Recommended
Industrial Sensor Interfaces
Industrial sensor interfaces benefit from the PIC16F18456-I/SP's 12-bit ADCC, EUSART, and SPI/I2C ports, which handle analog conditioning plus digital protocols in a single chip. The -40C to +85C industrial range operates in factory floors, while XLP idle modes reduce energy use in 4-20 mA loop-powered or energy-harvesting sensors. The CIP framework reduces CPU load, freeing bandwidth for deterministic response to safety-critical events.
Recommended
Low-Power Remote Controls
For low-power remote controls (RF, IR, BLE), the PIC16F18456-I/SP integrates the timer and PWM resources for IR modulation while the EUSART drives UART-based BLE or sub-GHz modules. XLP technology's nanoWatt sleep currents enable years of operation from a single CR2032 coin cell, and CIP-driven wake-on-input responds instantly to button presses without CPU boot latency. The 28-SPDIP package eases prototype rework when adding IR-driver circuitry.
Recommended
Battery-Operated Medical Devices
Battery-operated medical devices such as glucose monitors, pulse oximeters, and wearable health trackers benefit from the PIC16F18456-I/SP's XLP technology, on-chip 12-bit ADCC, and DAC for sensor excitation and signal conditioning. The 28 KB Flash accommodates field-upgradable firmware with version checks, while deterministic CIP execution supports predictable response on safety-critical measurements. Industrial temperature range supports portable clinical and home-care use cases.
Recommended
Motor Control and PWM Subsystems
The PIC16F18456-I/SP's Complementary Waveform Generator (CWG) outputs synchronized PWM pairs with programmable dead-band, making it suitable for brushed and stepper motor control. The on-chip 12-bit ADCC samples feedback signals (current, voltage, position), while CIPs perform cycle-by-cycle current limiting in hardware without CPU latency. The 2 KB RAM comfortably handles PID controller state variables and encoder quadrature decoding.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F18456-I/SP β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F18455-I/SP | PIC16F18446-I/SP | PIC16F18445-I/SP | PIC16F18346-I/SP |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SPDIP (through-hole) | 28-SPDIP (through-hole) | 28-SPDIP (through-hole) | 28-SPDIP (through-hole) | 28-SPDIP (through-hole) |
| CPU Core | PIC16 8-bit RISC | PIC16 8-bit RISC | PIC16 8-bit RISC | PIC16 8-bit RISC | PIC16 8-bit RISC |
| Program Memory | 28 KB Flash | 28 KB Flash | 28 KB Flash | 14 KB Flash | 28 KB Flash |
| RAM | 2 KB | 2 KB | 1 KB | 1 KB | 2 KB |
| Maximum Clock | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| 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 |
| Peripheral Set | ADCC, CWG, 2xPWM, DAC, CMP, EUSART, 2xSPI/I2C | Reduced ADCC/CWG set | Reduced ADCC/CWG set | Reduced ADCC/CWG set | 12-bit ADC (no CWG), 2xPWM, DAC, CMP, EUSART, 2xSPI/I2C |
Key Differentiators
- Largest Flash with full CIP and CWG peripheral set in the 1845x family (vs PIC16F18455-I/SP)
- Doubled RAM vs the 18445/18446 reduced-memory siblings (vs PIC16F18446-I/SP)
- Newer-generation CWG over the PIC16F18346 (vs PIC16F18346-I/SP)
Design Notes
Estimated: At 32 MHz with VDD=3.3V, the PIC16F18456-I/SP active current is approximately 3-5 mA depending on peripheral activity. For battery-powered designs, sleep current dominates long-term energy budget. XLP sleep modes (Retention-only RAM) draw < 100 nA typical, enabling multi-year coin-cell operation with proper wake-on-peripheral configuration. Always add a 0.1 uF decoupling capacitor within 5 mm of VDD pin and a bulk 10 uF on the supply rail to suppress MCU switching transients.
Place analog VDD/VSS (AVDD/AVSS) decoupling capacitors as close to those pins as possible, even if AVDD is tied to VDD - stray impedance degrades 12-bit ADCC noise performance. The 28-SPDIP package has generous pin spacing (2.54 mm pitch) easing hand wiring for prototypes and educational kits, but signals should still be routed with care to avoid cross-coupling on adjacent ADC channels. Keep digital switching lines (PWM, EUSART clocks) physically separate from sensitive analog traces.
Common pitfalls: (1) ICSPCLK/ICSPDAT (RB6/RB7) are shared with general-purpose GPIO - if these pins are repurposed, ensure ICSP programming remains accessible via resistors or test points for production flash programming. (2) Configuring VREF+ on RA3 disables analog reads on that pin - check the PPS (Peripheral Pin Select) assignment in the configuration bits before locking firmware. (3) The internal 32 MHz oscillator needs a calibration step at runtime; external crystal needed only when USB or accurate EUSART baud rates are required.
Compliance Information
RoHS compliant per Microchip product page. Industrial -40C to +85C temperature range; AEC-Q100 not applicable - non-automotive part. See PIC16F18456-I/SP automotive-grade part numbers for AEC-Q100 options if needed.
