PIC16LF18445-I/SS - 8-bit XLP MCU 14KB Flash 20-SSOP | Microchip
MPN: PIC16LF18445-I/SS ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.92 | $1.92 |
| 10 | $1.74 | $17.40 |
| 100 | $1.43 | $143.00 |
| 500 | $1.22 | $610.00 |
| 1,000 | $1.08 | $1,080.00 |
PIC16LF18445-I/SS Overview
An 8-bit microcontroller is a small, low-cost computing core built around an 8-bit data path with on-chip Flash, RAM, peripherals and an interrupt controller. PIC microcontrollers use a Harvard RISC architecture with separate program and data buses, allowing most instructions to execute in a single cycle. Within the broader semiconductor hierarchy they sit under microcontrollers, embedded ICs and finally integrated circuits. The 8-bit class remains popular in low-power sensor, motor and human-interface designs where deterministic real-time response and long battery life outweigh raw throughput.
Key features that differentiate the PIC16LF18445 include 14 KB self-programmable Flash, Memory Access Partitioning (MAP) for bootloader-style code protection, the Device Information Area (DIA) for serial-number and calibration storage, and Peripheral Pin Select (PPS) that remaps digital peripherals to nearly any I/O pin. The ADC2 block performs averaging, oversampling and threshold comparisons in hardware, offloading signal conditioning from the CPU. Together these features let a single chip replace a discrete op-amp, filter and MCU in many sensor front-ends.
Typical applications include battery-powered IoT sensor nodes, low-power remote controls, white-goods and appliance user interfaces, small motor/valve controllers, and personal-care or medical consumables. Designers choose it when the system is size- and energy-constrained but still needs accurate analog sensing and serial connectivity. The 32 MHz core, 1 KB RAM and 14 KB Flash are ample for state-machine control and modest communication stacks such as Modbus RTU or LIN slaves.
Drop-in alternatives for PIC16LF18445-I/SS — 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 PIC16LF18445-I/SS (same form factor and footprint) — differing in Operating Temperature, Package, DAC, ADC, Core.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F18445-I/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LF18444-I/SS
✅ Drop-In✓ In Stock
$1.32 / Unit
View Datasheet →PIC16LF18345-I/SS
✅ Drop-In✓ In Stock
$1.18 / Unit
View Datasheet →PIC16LF18445-I/SO
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.15 / Unit
View Datasheet →PIC16F18345-I/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LF18426-I/SL
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC16LF18445-I/SS Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit PIC RISC |
| Family | PIC® XLP™ 16F |
| CPU Speed | 32 MHz (8 MIPS) |
| Program Memory (Flash) | 14 KB (8K x 14) |
| Data Memory (RAM) | 1 KB |
| EEPROM | 256 bytes |
| Operating Voltage | 1.8 V to 3.6 V |
| I/O Pins | 18 |
| ADC | 12-bit ADC2 with Computation |
| DAC | 8-bit DAC, 1 channel |
| Comparators | Yes |
| PWM Channels | 2 |
| Communication | 1x EUSART, 1x SPI, 1x I²C |
| Core Independent Peripherals | CLC, CWG, NCO, PPS, MAP, DIA |
| Package | 20-pin SSOP (5.30 mm body width) |
| Operating Temperature | -40 °C to +85 °C (industrial) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
PIC16LF18445-I/SS Pin Configuration
| Pin 1 | VDD — Positive supply voltage (1.8 V to 3.6 V) |
| Pin 2 | RA5 — Port A bit 5, digital I/O with PPS |
| Pin 3 | RA4 — Port A bit 4, digital I/O with PPS |
| Pin 4 | MCLR/RA3 — Reset input (active low) or digital I/O |
| Pin 5 | RC5 — Port C bit 5, digital I/O with PPS |
| Pin 6 | RC4 — Port C bit 4, digital I/O with PPS |
| Pin 7 | RC3 — Port C bit 3, digital I/O with PPS (SCL) |
| Pin 8 | RC2 — Port C bit 2, digital I/O with PPS (SDA) |
| Pin 9 | RC1 — Port C bit 1, digital I/O with PPS |
| Pin 10 | RC0 — Port C bit 0, digital I/O with PPS |
| Pin 11 | RA2 — Port A bit 2, digital I/O with PPS |
| Pin 12 | RA1 — Port A bit 1, digital I/O with PPS (DAC1OUT) |
| Pin 13 | RA0 — Port A bit 0, digital I/O with PPS |
| Pin 14 | VSS — Ground reference |
| Pin 15 | RB7 — Port B bit 7, digital I/O with PPS (ICSPDAT) |
| Pin 16 | RB6 — Port B bit 6, digital I/O with PPS (ICSPCLK) |
| Pin 17 | RB5 — Port B bit 5, digital I/O with PPS |
| Pin 18 | RB4 — Port B bit 4, digital I/O with PPS |
| Pin 19 | AVSS — Analog ground reference |
| Pin 20 | AVDD — Analog positive supply (1.8 V to 3.6 V) |
Typical Applications
PIC16LF18445-I/SS is suitable for 6 applications: Battery-Powered IoT Sensor Nodes, Small Motor and Valve Controllers, White-Goods and Appliance User Interfaces, Personal Care and Medical Consumables, Remote Control and HMI Keypads, Industrial Sensor Transmitters.
Battery-Powered IoT Sensor Nodes
The PIC16LF18445-I/SS is well suited to coin-cell or 2xAA IoT sensor nodes thanks to its eXtreme Low-Power (XLP) sleep currents below 50 nA with RTC running, 1.8-3.6 V VDD from a LiFePO4 cell, and the 12-bit ADC2 with Computation that performs oversampling and threshold comparisons in hardware so the CPU can stay asleep. Its 14 KB Flash is sufficient for periodic sampling and Modbus RTU or proprietary sub-GHz wake-up handshakes via the EUSART or SPI bus.
Recommended
Small Motor and Valve Controllers
For small brushed DC motors, solenoid valves and stepper-driven fluidics, the PIC16LF18445-I/SS provides two PWMs, the Complementary Waveform Generator (CWG) for dead-band control, and an 8-bit DAC for set-point generation, all on a 32 MHz core that is fast enough for PI loops at kHz rates. Peripheral Pin Select (PPS) lets the designer route PWM and CWG outputs to whichever pins the H-bridge layout requires without rework. The industrial -40 to +85 °C grade supports under-hood and outdoor enclosures.
Recommended
White-Goods and Appliance User Interfaces
Appliance front panels typically combine a 7-segment or TFT display, capacitive touch buttons, and a low-speed serial link to the main appliance controller. The PIC16LF18445-I/SS drives LED matrices via the CWG, scans cap-touch sensors through the 12-bit ADC2 with Computation, and reports status over UART or SPI to the host. Its 1.8-3.6 V VDD range lets it share a 3.3 V rail with the appliance SoC, while PPS removes pin-routing headaches on crowded PCBs.
Recommended
Personal Care and Medical Consumables
Personal-care devices such as electronic toothbrushes, shavers and skin-care wands, plus disposable medical sensors, need a low-cost 8-bit core, very low standby current, and an accurate ADC for battery and skin sensing. The PIC16LF18445-I/SS hits these requirements with XLP sleep modes below 50 nA, a 12-bit ADC2 with hardware averaging, and 256 bytes EEPROM for parameter storage. The SSOP-20 footprint is small enough for hand-held ergonomic PCBs.
Recommended
Remote Control and HMI Keypads
Universal remote controls, RF key fobs and HMI keypads benefit from the PIC16LF18445-I/SS's fast wake-up from sleep via the CLC, on-chip UART/SPI for RF or IR transceiver interfaces, and low BOM count thanks to internal 8-bit DAC and comparators. The 32 MHz core lets it decode IR protocols or run simple RF packet handlers in real time, while 1 KB RAM is sufficient for protocol stacks and button debouncing. PPS lets designers keep the PCB layout simple.
Recommended
Industrial Sensor Transmitters
Loop-powered 4-20 mA sensor transmitters, RTD-to-digital converters and strain-gauge signal conditioners need a low-power MCU that can run compensation math, drive an LCD, and talk HART or Modbus on the same 3.3 V rail. The PIC16LF18445-I/SS fits with 1.8-3.6 V VDD, 12-bit ADC2, 256 bytes EEPROM for calibration constants, and the 5-bit DAC for offset trimming. Industrial -40 to +85 °C operation covers outdoor and factory-floor deployments.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LF18445-I/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F18445-I/SS | PIC16LF18444-I/SS | PIC16LF18345-I/SS | PIC16LF18445-I/SO | PIC16F18345-I/SS | PIC16LF18426-I/SL |
|---|---|---|---|---|---|---|---|
| Package | 20-SSOP (5.30 mm) | 20-SSOP - same | 20-SSOP - same | 20-SSOP - same | 20-SOIC (7.50 mm) - different land pattern | 20-SSOP - same | 20-SSOP - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Operating Voltage | 1.8 V to 3.6 V | 1.8 V to 5.5 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 5.5 V | 1.8 V to 3.6 V |
| Flash Memory | 14 KB | 14 KB | 7 KB | 14 KB | 14 KB | 14 KB | 28 KB |
| RAM | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB | 2 KB |
| EEPROM | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 256 bytes |
| ADC | 12-bit ADC2 | 12-bit ADC2 | 12-bit ADC2 | 10-bit ADC | 12-bit ADC2 | 10-bit ADC | 12-bit ADC2 |
| MAP / DIA Features | Yes | Yes | Yes | No | Yes | No | Yes |
Key Differentiators
- Newer-generation ADC2 and CIPs vs PIC16LF18345-I/SS (vs PIC16LF18345-I/SS)
- Same SSOP-20 footprint as PIC16F18445-I/SS with extended VDD range on F variant (vs PIC16F18445-I/SS)
- Half the Flash of PIC16LF18426-I/SL at lower cost (vs PIC16LF18426-I/SL)
Design Notes
PIC16LF18445-I/SS power design. Place a 100 nF decoupling capacitor within 5 mm of VDD (pin 1) and a 10 µF bulk capacitor on the 3.3 V rail. For ADC accuracy, add a 100 nF between AVDD (pin 20) and AVSS (pin 19). XLP sleep current drops below 50 nA with RTC running; disable unused peripherals via PMD registers to reach the lowest sleep floor per PIC16(L)F18455/56 datasheet guidance.
PIC16LF18445-I/SS PCB layout. The SSOP-20 thermal pad is not exposed on this package, but still route the I/O signals on inner layers away from the analog AVDD/AVSS pair to avoid digital switching noise coupling into ADC2 measurements. Keep the ICSPCLK/ICSPDAT traces (RB6/RB7) accessible for in-circuit serial programming headers, and per the catalog entry leave MCLR (pin 4) accessible for hardware reset during bring-up.
PIC16LF18445-I/SS programming pitfalls. Never tie MCLR directly to VDD without a 10 kΩ pull-up; the datasheet mandates a 10 kΩ pull-up plus a 100 nF cap to ground for clean in-circuit programming. When migrating from PIC16F18345 code, verify PPS register assignments because pin-to-peripheral mappings changed in the '45 family per the PIC16(L)F18455/56 datasheet. Always select the LF device row in MPLAB X for correct VDD range checks.
ADC2 noise design. Drive the analog inputs (RA0-RA5) from low-impedance sources (<10 kΩ) and add a 100 nF anti-aliasing cap at the pin. The ADC2 with oversampling can reach 16-bit effective resolution at low conversion rates per the datasheet. Avoid routing PWM outputs next to analog traces on the same layer; place a ground guard between them when PCB area is tight.
Compliance Information
RoHS compliant per Microchip PIC16(L)F18455/56 datasheet. Industrial -40 to +85 °C grade only - choose PIC16F18445T-I/SSVAO or -E/SSVAO for AEC-Q100 automotive. Lead-free SSOP-20 package per Microchip packaging spec.
