PIC16LF18456T-I/SO - 8-bit MCU, 28KB Flash, 32MHz, 28-SOIC | Microchip
MPN: PIC16LF18456T-I/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.45 | $2.45 |
| 10 | $2.18 | $21.80 |
| 100 | $1.92 | $192.00 |
| 500 | $1.65 | $825.00 |
| 1,000 | $1.42 | $1,420.00 |
| 2,500 | $1.18 | $2,950.00 |
PIC16LF18456T-I/SO Overview
An 8-bit PIC microcontroller is a compact, deterministic RISC processor widely used in embedded control. Within the broader taxonomy, it sits under microcontroller (MCU) -> embedded processor -> semiconductor IC. Microchip's PIC16 architecture uses a Harvard design with separate program and data buses, enabling single-cycle instruction execution and predictable interrupt latency. The "LF" XLP series optimizes quiescent current to microampere and nanoampere ranges for sleep, idle, and doze modes, making it competitive with low-power ARM Cortex-M0+ parts in energy-sensitive applications such as wearables, IoT sensors, and remote controls.
Key features include hardware CWG (Complementary Waveform Generator) for synchronous H-bridge and PFC drive, the ADC2 with averaging, oversampling, and threshold comparison, plus Memory Access Partitioning (MAP) for bootloader support. The device supports up to 25 mA source/sink per I/O, on-chip debug via ICD, and an internal 32MHz oscillator trimmed to within ±1% across temperature and voltage.
Typical applications span low-power IoT nodes, sensor signal conditioning, motor control, LED lighting drivers, and battery chargers. The rich analog-mixed-signal integration often eliminates a companion op-amp or external ADC, reducing BOM cost.
When designing, place 0.1µF and 1µF decoupling capacitors adjacent to VDD and AVdd pins and route the analog reference (VREF+) with a Kelvin connection to the source pad. The PIC16LF18456T-I/SO is shipped in tape and reel with an industrial -40°C to +85°C operating range. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the standalone manufacturer datasheet.
Drop-in alternatives for PIC16LF18456T-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 PIC16LF18456T-I/SO (same form factor and footprint) — differing in Operating Temperature, Package, Comparators, DAC, Mounting Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LF18456-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F18456T-I/SO
✅ Drop-In✓ In Stock
$0.98 / Unit
View Datasheet →PIC16LF18455T-I/SO
✅ Drop-In✓ In Stock
$1.18 / Unit
View Datasheet →PIC16LF18456T-I/SO Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC 8-bit Enhanced Mid-Range |
| Program Memory (Flash) | 28 KB (16K x 14) |
| Data SRAM | 2 KB |
| Data EEPROM | 256 bytes |
| Maximum CPU Frequency | 32 MHz |
| Supply Voltage (VDD) | 1.8 V to 3.6 V |
| Operating Temperature | -40 °C to +85 °C (Industrial) |
| ADC | 12-bit ADC2 with Computation |
| DAC | 5-bit DAC |
| PWM Channels | 2 x 10-bit PWM |
| Comparators | Yes |
| Communication Interfaces | 1 x EUSART, 2 x SPI/I2C |
| CWG (Complementary Waveform Generator) | Yes |
| Package | 28-SOIC (0.295 in / 7.50 mm width) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Lead-Free | Yes |
PIC16LF18456T-I/SO Pin Configuration
| Pin 1 | RA0/ICSPDAT — Digital I/O / ICSP data |
| Pin 2 | RA1/ICSPCLK — Digital I/O / ICSP clock |
| Pin 3 | RA2 — Digital I/O |
| Pin 4 | RA3/MCLR — Digital I/O / Master Clear (reset) |
| Pin 5 | RA4 — Digital I/O |
| Pin 6 | RA5 — Digital I/O |
| Pin 7 | RA6 — Digital I/O |
| Pin 8 | RA7 — Digital I/O |
| Pin 9 | VSS — Ground |
| Pin 10 | RB0 — Digital I/O |
| Pin 11 | RB1 — Digital I/O |
| Pin 12 | RB2 — Digital I/O |
| Pin 13 | RB3 — Digital I/O |
| Pin 14 | RB4 — Digital I/O |
| Pin 15 | RB5 — Digital I/O |
| Pin 16 | RB6 — Digital I/O |
| Pin 17 | RB7 — Digital I/O |
| Pin 18 | VSS — Ground (analog) |
| Pin 19 | VDD — Supply voltage |
| Pin 20 | RC0 — Digital I/O |
| Pin 21 | RC1 — Digital I/O |
| Pin 22 | RC2 — Digital I/O |
| Pin 23 | RC3 — Digital I/O |
| Pin 24 | RC4 — Digital I/O |
| Pin 25 | RC5 — Digital I/O |
| Pin 26 | RC6 — Digital I/O |
| Pin 27 | RC7 — Digital I/O |
| Pin 28 | AVDD — Analog supply voltage |
Typical Applications
PIC16LF18456T-I/SO is suitable for 7 applications: Battery-Powered IoT Sensor Nodes, LED Lighting Drivers and Dimmers, Low-Power Motor Control (BLDC, Stepper), Consumer Remote Controls and HMI, Industrial Sensor Signal Conditioning, USB-C Power Delivery and Battery Chargers, Automotive Body Electronics (Non-Safety).
Battery-Powered IoT Sensor Nodes
The PIC16LF18456T-I/SO excels in coin-cell and lithium-battery IoT nodes due to its nanoWatt XLP sleep current below 50 nA. The 12-bit ADC2 with hardware averaging autonomously reads temperature, humidity, or gas sensors every few seconds, waking the CPU only when a threshold is crossed. This hands-off monitoring approach extends CR2032 battery life to 5-10 years in field deployments. The 28KB Flash accommodates BLE/Zigbee stack fragments plus application logic, while the 32MHz CPU burst handles packet assembly within millisecond windows.
Recommended
LED Lighting Drivers and Dimmers
The PIC16LF18456T-I/SO drives LED strings directly via its 25 mA I/O and 10-bit PWM channels for smooth 0-100% dimming. The CWG (Complementary Waveform Generator) produces non-overlapping H-bronst drive with hardware dead-time control, eliminating shoot-through in buck or boost LED drivers. With 28KB Flash, multiple lighting profiles (daylight, scene, alarm) fit comfortably. Industrial -40°C to +85°C operation handles outdoor fixture environments without additional thermal conditioning.
Recommended
Low-Power Motor Control (BLDC, Stepper)
For brushless DC or stepper motor control, the PIC16LF18456T-I/SO integrates CWG plus 10-bit PWM with complementary outputs and hardware dead-time insertion, supporting 6-step or FOC commutation at up to 32MHz. The 12-bit ADC2 samples back-EMF or current shunt synchronously to the PWM, while the EUSART interfaces to position encoders. At $1.42 in volume, the part competes with dedicated motor-controller ICs while providing full MCU flexibility for closed-loop PID tuning.
Recommended
Consumer Remote Controls and HMI
In handheld remote controls, the PIC16LF18456T-I/SO scans up to a 12x8 matrix keypad via its I/O and ADC2 channels with wake-on-touch interrupts, consuming below 1 µA in standby. The 2KB SRAM accommodates button debounce buffers and IR protocol state machines (NEC, RC5, SIRC). UART and SPI/I2C peripherals drive an OLED display or external transceiver. Tape-and-reel packaging supports high-volume SMT assembly.
Recommended
Industrial Sensor Signal Conditioning
The PIC16LF18456T-I/SO conditions 4-20 mA or 0-10 V industrial sensor signals using its 12-bit ADC2 and 5-bit DAC for excitation or offset trimming. The internal comparator triggers alarm interrupts without CPU load, while EUSART outputs digital readings to a PLC or HMI panel. Industrial -40°C to +85°C operation and 1.8V-3.6V operation handle factory floor conditions. On-chip EEPROM stores calibration constants, avoiding external memory ICs.
Recommended
USB-C Power Delivery and Battery Chargers
USB-C PD and lithium-ion charger designs use the PIC16LF18456T-I/SO to negotiate PD profiles via CC lines (with companion TCPC), monitor cell voltage with ADC2, and switch charge current via PWM. The 28KB Flash hosts both PD protocol state machines and charge algorithms (CC-CV, JEITA). NanoWatt sleep prevents drain in idle/standby states below 1% per month. Industrial temperature grade suits consumer power-bank and wall-charger deployment.
Recommended
Automotive Body Electronics (Non-Safety)
For non-safety automotive body electronics (interior lighting, seat controllers, HVAC auxiliaries), the PIC16LF18456T-I/SO handles PWM-driven loads, LIN bus communication via the EUSART, and ADC-based sensor reads. The 1.8V-3.6V operation matches modern automotive 3.3V rails, while the -40°C to +85°C industrial range covers cabin environments. For under-hood or AEC-Q100-grade applications, choose the AEC-Q100-qualified PIC16LF18456T-I/SO VAO variant.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LF18456T-I/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LF18456-I/SO | PIC16F18456T-I/SO | PIC16LF18455T-I/SO |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SOIC | 28-SOIC (same) | 28-SOIC (same) | 28-SOIC (same) |
| Program Flash | 28 KB | 28 KB | 28 KB | 14 KB |
| SRAM | 2 KB | 2 KB | 2 KB | 1 KB |
| Supply Voltage | 1.8 V to 3.6 V (LF) | 1.8 V to 3.6 V (LF) | 1.8 V to 5.5 V (F) | 1.8 V to 3.6 V (LF) |
| Maximum Clock | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| CWG Peripheral | Yes | Yes | Yes | Limited |
| ADC2 (12-bit) | Yes | Yes | Yes | Yes |
| Automotive Grade | No (Industrial) | No (Industrial) | No (Industrial) | No (Industrial) |
Key Differentiators
- Full CWG peripheral (vs limited on 18455) (vs PIC16LF18455T-I/SO)
- 2KB SRAM and 28KB Flash (vs 1KB / 14KB on 18455) (vs PIC16LF18455T-I/SO)
- 1.8V-3.6V LF XLP nanoWatt operation (vs 5V on F variant) (vs PIC16F18456T-I/SO)
Design Notes
Estimated: At VDD=3.3V and CPU active at 32MHz (typical 8 mA per datasheet 40002038C), decoupling requires a 0.1µF ceramic placed within 3mm of pin 19 (VDD) and another on pin 28 (AVDD). Place a bulk 10µF tantalum or ceramic at the PCB supply rail entry. For sleep mode below 1 µA, route AVSS and VSS to a single star ground with a ferrite bead to isolate analog and digital return currents.
Keep traces to the 32MHz crystal (if used) below 5mm with controlled impedance; route them symmetrically to both OSC1/OSC2 pins. Place the crystal adjacent to the MCU and guard it with a ground ring. For the internal 32MHz HFINTOSC (no crystal required for most designs), leave pin 1 and pin 2 ICSP pins accessible to enable in-circuit debugging via MPLAB Snap.
Do not exceed 3.6V on VDD of the LF variant - the device will not latch-up but Flash read integrity degrades. Always configure the MCLR pin as reset (default) unless disable is intentional. When using ADC2 with VREF+, add a 10nF capacitor on VREF+ close to the pin and avoid switching digital signals across it. According to datasheet 40002038C, peripheral interrupt priorities must be cleared on POR to avoid stale flags.
Estimated: SOIC-28 has theta_JA approximately 70 °C/W (per typical SOIC thermal data). At worst-case active current of 15 mA and 3.6V, dissipation is 54 mW, yielding a junction rise of 3.8°C above ambient. Industrial-grade parts (up to +85°C ambient) have 7°C margin; no heatsink required for normal operation. Avoid placing the part adjacent to high-power inductors or switching FETs that could couple thermal stress during high-load conditions.
Compliance Information
RoHS compliant per Microchip product page. Industrial temperature grade (-40°C to +85°C), not AEC-Q100 qualified; for automotive applications use AEC-Q100-qualified VAO suffix variant. Lead-free matte-tin plating per JESD97.
