PIC16LF18445T-I/SO - 32MHz 8-bit XLP MCU, 14KB Flash | Microchip
MPN: PIC16LF18445T-I/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.85 | $1.85 |
| 10 | $1.66 | $16.60 |
| 100 | $1.4 | $140.00 |
| 500 | $1.18 | $590.00 |
| 1,000 | $1.02 | $1,020.00 |
PIC16LF18445T-I/SO Overview
An 8-bit microcontroller (MCU) is a compact computing-on-a-chip that integrates a CPU, non-volatile program memory (Flash), working RAM, and a rich set of peripherals onto a single silicon die. It belongs to the broader family of microcontrollers -> microcontrollers and microprocessors -> semiconductors -> integrated circuits. The 8-bit data path makes MCUs of this class ideal for cost-sensitive, deterministic, low-power embedded control tasks such as sensor reading, motor drive, user I/O, and protocol bridging, where the application demands predictable response times rather than raw computational throughput.
Key features of the PIC16LF18445T-I/SO include 14KB self-programmable Flash with 128B of EEPROM emulation, 1KB SRAM, a 12-bit differential ADCC capable of up to 100 ksps, a 5-bit DAC, two 10-bit PWMs, three comparators, CWG, four CLCs, an EUSART, two MSSP (SPI/I2C) peripherals, and a 32 MHz internal oscillator with ±1% accuracy. XLP technology delivers typical sleep currents in the nanoamp range and active currents in the microamp range at low clock speeds, which is essential for IoT sensor nodes that spend most of their time in deep sleep.
The 20-pin SOIC package exposes up to 17 general-purpose I/O pins and is fully pin-compatible with the PIC16LF18444 (12KB Flash) and PIC16LF18345 (14KB Flash, smaller RAM) families, simplifying migration within Microchip's PIC16 XLP portfolio. The device is supported by MPLAB X IDE, the XC8 compiler, and the MPLAB Code Configurator (MCC) for graphical peripheral setup, accelerating development cycles.
Typical applications include battery-powered IoT sensor nodes, wearable health monitors, remote controls, low-power wireless sensor transmitters, and consumer appliance user-interface controllers. The compact 20-pin SOIC footprint is well suited for hand-held and space-constrained designs where PCB real estate is at a premium.
When designing with this MCU, ensure that the ICSP programming pins (PGED/PGEC) are accessible on the PCB for in-circuit programming and debugging. The wide 1.8V-3.6V supply range permits direct connection to a single Li-ion / two AA cells; at 32 MHz, plan for active-mode current of a few mA to avoid over-discharging the battery during sustained operation.
This page synthesizes distributor pricing, drop-in alternatives, design notes, and XLP power-tuning guidance not found in the bare manufacturer datasheet.
Drop-in alternatives for PIC16LF18445T-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 PIC16LF18445T-I/SO (same form factor and footprint) — differing in Package, DAC, ADC, Core Architecture, Comparators.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LF18445-I/SO
✅ Drop-In✓ In Stock
$1.15 / Unit
View Datasheet →PIC16LF18444T-I/SO
✅ Drop-In✓ In Stock
$0.76 / Unit
View Datasheet →PIC16LF18444T-I/SS
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$0.65 / Unit
View Datasheet →PIC16LF18345T-I/SO
✅ Drop-In✓ In Stock
$1.06 / Unit
View Datasheet →PIC16LF18344-I/SO
✅ Drop-In✓ In Stock
$1.02 / Unit
View Datasheet →PIC16LF18445T-I/SO Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit PIC16 enhanced mid-range |
| Program Memory (Flash) | 14 KB (8K x 14) |
| Data SRAM | 1 KB |
| EEPROM (Flash emulation) | 128 B (HEFDE) |
| Maximum CPU Speed | 32 MHz (16 MIPS) |
| Supply Voltage Range | 1.8 V to 3.6 V |
| ADC | 12-bit ADCC, differential, up to 100 ksps |
| DAC | 5-bit, 1 channel |
| Comparators | 3 |
| PWM Channels | 2 (10-bit) |
| Configurable Logic Cells (CLC) | 4 |
| Complementary Waveform Generator (CWG) | 1 |
| Communication | 1x EUSART, 2x MSSP (SPI / I2C) |
| GPIO | Up to 17 (varies by package) |
| Package | 20-pin SOIC (SO) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40 C to +85 C (Industrial) |
| MSL Level | 1 (unlimited) |
| RoHS Status | Compliant |
| Lead-Free | Yes |
PIC16LF18445T-I/SO Pin Configuration
| Pin 1 | VDD — Positive supply (1.8V-3.6V) |
| Pin 2 | RA5 — GPIO / IOC / ADC channel |
| Pin 3 | RA4 — GPIO / IOC / ADC channel |
| Pin 4 | RA3/MCLR — Master Clear (reset) input |
| Pin 5 | RA2 — GPIO / IOC / analog / DAC output |
| Pin 6 | RA1 — GPIO / IOC / analog / ICSPCLK |
| Pin 7 | RA0 — GPIO / IOC / analog / ICSPDAT |
| Pin 8 | VSS — Ground reference |
| Pin 9 | RA7 — GPIO / IOC |
| Pin 10 | RA6 — GPIO / IOC |
| Pin 11 | RC5 — GPIO / IOC / PWM / SPI/I2C |
| Pin 12 | RC4 — GPIO / IOC / PWM / SPI/I2C |
| Pin 13 | RC3 — GPIO / IOC / SPI/I2C / EUSART |
| Pin 14 | RC2 — GPIO / IOC / comparator / EUSART |
| Pin 15 | RC1 — GPIO / IOC / comparator / EUSART |
| Pin 16 | RC0 — GPIO / IOC / comparator / EUSART |
| Pin 17 | RB7 — GPIO / IOC / SPI/I2C |
| Pin 18 | RB6 — GPIO / IOC / SPI/I2C / ICSPCLK |
| Pin 19 | RB5 — GPIO / IOC / SPI/I2C / ICSPDAT |
| Pin 20 | RB4 — GPIO / IOC / SPI/I2C |
Typical Applications
PIC16LF18445T-I/SO is suitable for 6 applications: Battery-Powered IoT Sensor Node, Wearable Health Monitor, Remote Control Transmitter, Consumer Appliance User-Interface Controller, Low-Power Wireless Sensor Tag, Industrial Sensor Transmitter (4-20 mA).
Battery-Powered IoT Sensor Node
The PIC16LF18445T-I/SO fits battery-powered IoT sensor nodes by combining a 1.8 V-3.6 V supply range that matches a single Li-ion cell, a 12-bit ADCC capable of 100 ksps for accurate temperature, humidity and gas-sensor reads, and XLP technology that drops sleep current into the nanoamp range. With 14 KB Flash and 1 KB SRAM the MCU can host a small LoRaWAN or BLE radio driver fragment plus a sensor-fusion loop. Placed as the central controller on a 2-layer PCB with a 32.768 kHz watch crystal, it consumes roughly 50 nA in sleep and a few mA during a 1 ms wake-and-transmit cycle. Compare to PIC16LF18345T-I/SO which lacks the 12-bit ADCC and would degrade dynamic range on low-output analog sensors.
Recommended
Wearable Health Monitor
The PIC16LF18445T-I/SO is well matched to wearable health monitors where PCB area, weight and battery life dominate the BOM. The 12-bit differential ADCC digitizes photoplethysmography (PPG) and bio-impedance signals directly, eliminating an external ADC and saving 2x2 mm of board space. XLP sleep in the nanoamp range lets a wristband run for months on a CR2032 coin cell, while the CWG can drive a haptic-feedback piezo directly without a driver FET. Engineers should keep the ICSP PGED/PGEC pins routed to test pads to allow firmware updates on the production line.
Recommended
Remote Control Transmitter
The PIC16LF18445T-I/SO drives IR or sub-GHz remote-control transmitters by combining 14 KB Flash for protocol stacks (RC5, NEC, BLE-beacon), 2 PWMs for LED-backlight dimming and buzzer tone generation, and 17 GPIOs to scan 8x8 key matrices with minimal external logic. The 32 MHz core executes scan-and-debounce plus protocol encoding in well under 1 ms per loop, leaving the device in XLP sleep for the remaining 99% of the duty cycle. Compared to PIC16LF1827T-I/SO which lacks CWG and ADCC, the PIC16LF18445T-I/SO supports newer capacitive-touch firmware libraries and adds the 12-bit ADC for battery-voltage telemetry.
Recommended
Consumer Appliance User-Interface Controller
The PIC16LF18445T-I/SO suits consumer appliance UI boards (washing machines, induction cooktops, smart ovens) where capacitive touch, rotary encoder inputs, LED feedback and a serial link to the main control MCU must coexist. The four Configurable Logic Cells (CLC) implement custom signal conditioning without external gates, and the CWG generates the dead-time-controlled complementary waveforms needed for triac-based heater control. The 20-pin SOIC package's wide pin pitch (1.27 mm) survives hand-soldering during service, an important advantage over QFN alternatives.
Recommended
Low-Power Wireless Sensor Tag
The PIC16LF18445T-I/SO fits wireless sensor tags for cold-chain logistics, asset tracking and environmental monitoring by hosting the sensor-read loop, encryption-light MAC layer, and sleep-low-wakeup state machine in 14 KB Flash. The 5-bit DAC generates a reference bias for an external analog-front-end IC, and the EUSART talks to a sub-GHz transceiver such as the Microchip MRF89XA at 868/915 MHz. The combination of 32 MHz performance and nanoamp sleep allows multi-year operation on a single coin cell when transmissions are duty-cycled below 1%.
Recommended
Industrial Sensor Transmitter (4-20 mA)
The PIC16LF18445T-I/SO powers 2-wire 4-20 mA industrial sensor transmitters by reading a bridge pressure sensor with the 12-bit differential ADCC and driving the loop with a PWM-then-filtered DAC output. XLP idle modes reduce loop-current consumption below 3.5 mA, leaving the full 4-20 mA span for measurement signaling. The wide -40 C to +85 C industrial temperature range and 20-pin SOIC's robust pin pitch meet IEC 61000-4 ESD/CISPR 11 EMI margins in field installations, where smaller QFN parts would be more difficult to rework.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LF18445T-I/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LF18445-I/SO | PIC16LF18444T-I/SO | PIC16LF18345T-I/SO | PIC16LF18344-I/SO |
|---|---|---|---|---|---|
| Package | 20-pin SOIC | 20-pin SOIC - same | 20-pin SOIC - same | 20-pin SOIC - same | 20-pin SOIC - same |
| Brand | Microchip Technology | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same |
| Flash Memory | 14 KB | 14 KB | 12 KB | 14 KB | 7 KB |
| SRAM | 1 KB | 1 KB | 1 KB | 1 KB | 512 B |
| ADC | 12-bit ADCC (100 ksps) | 12-bit ADCC | 12-bit ADCC | 10-bit ADC | 10-bit ADC |
| CWG | Yes | Yes | Yes | No | No |
| Maximum Clock | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Operating Voltage | 1.8 V - 3.6 V | 1.8 V - 3.6 V | 1.8 V - 3.6 V | 1.8 V - 3.6 V | 1.8 V - 3.6 V |
Key Differentiators
- 12-bit ADCC vs older 10-bit ADC (vs PIC16LF18345T-I/SO)
- Complementary Waveform Generator (CWG) included (vs PIC16LF18345T-I/SO)
- Same-family pin compatibility with PIC16LF18444T-I/SO (vs PIC16LF18444T-I/SO)
Design Notes
Use the PIC16LF18445T-I/SO's XLP sleep modes aggressively: the datasheet shows sleep current in the nanoamp range when the LF48M oscillator is halted and peripherals are parked in their PMD bits. Estimated: a wake-every-10-seconds sensor node with a 2 ms active window at 32 MHz draws roughly 50 nA average from a CR2032 cell. Plan the ADC acquisition to finish inside the active window so the CPU can return to sleep immediately to maximize battery life.
Decouple VDD (pin 1) with a 100 nF X7R 0402 ceramic placed within 3 mm of the pin, plus a bulk 4.7 uF tantalum or aluminum-polymer cap at the board supply entry. Keep the ICSP PGED (pin 19) and PGEC (pin 18) traces short and away from switching rails so an MPLAB ICD 4 or PICkit 5 can program the device reliably in-circuit on the production board.
Do not drive the MCLR pin (RA3, pin 4) low in normal operation - it is the master-clear reset input and pulling it low continuously will keep the part in reset. The internal weak pull-up is enabled after POR, but for noisy industrial environments add an external 10 kohm pull-up to VDD. Also remember that the ICSPDAT/ICSPCLK pins (RA0/RA1) are multiplexed with general I/O; if MPLAB ICD is left connected during field use, firmware must release these pins or conflicts will occur with the application circuit.
Compliance Information
RoHS and REACH compliance stated on Microchip product page; PIC16LF18445T-I/SO is the industrial-grade (-40 C to +85 C) variant, not AEC-Q100 qualified - see PIC16F18445-E/SP for extended-temperature grades
