PIC16LF18345-I/SS - 8-Bit 32MHz 14KB Flash XLP MCU | Microchip
MPN: PIC16LF18345-I/SS ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.95 | $1.95 |
| 10 | $1.75 | $17.50 |
| 100 | $1.52 | $152.00 |
| 500 | $1.32 | $660.00 |
| 1,000 | $1.18 | $1,180.00 |
PIC16LF18345-I/SS Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash), data memory (RAM), and a rich set of peripherals including timers, ADC, communication interfaces, and general-purpose I/O. The PIC16LF18345 belongs to Microchip's enhanced mid-range 8-bit core family and is engineered as a low-pin-count (20-pin) XLP (eXtreme Low Power) device targeting applications that need long battery life, small PCB footprint, and digital control without a higher-cost 32-bit MCU. As a category, the PIC16 XLP family sits within Microchip's broader 8-bit MCU portfolio, which in turn is one of the foundational tiers of embedded microcontrollers alongside 16-bit, 32-bit, and 64-bit architectures.
Key features include 1024 bytes of data EEPROM, a 10-bit ADC with up to 17 channels, two comparators, a 10-bit DAC, two PWM modules, and Peripheral Pin Select (PPS) which allows remapping of digital peripherals to physical pins via firmware, dramatically simplifying PCB layout. The XLP technology enables nanoWatt sleep currents in the order of tens of nanoamps, allowing battery-powered sensor and remote-control products to operate for years on a single cell.
The PIC16LF18345 incorporates Core Independent Peripherals (CIPs) such as the Configurable Logic Cell (CLC), Complementary Waveform Generator, Numerically Controlled Oscillator, and Zero-Cross Detection. These CIPs operate without CPU intervention, offloading timing-critical tasks and reducing software complexity while the CPU remains asleep. The combination of PPS, CIPs, and XLP gives designers a flexible platform for motor control, lighting control, capacitive touch, sensor fusion, and communications bridging.
Typical applications include battery-powered IoT sensor nodes, BLE/Zigbee host MCUs (with an external transceiver), low-power remote controls, HVAC thermostat controls, small motor and fan controllers, LED lighting controllers, and consumer white goods. Designers often pair this MCU with an RN4870 Bluetooth module or an MRF24XA Wi-Fi front-end for connected products, while leveraging the XLP idle currents for standby operation. Engineers valuing long battery life, peripheral flexibility, and a familiar MPLAB X toolchain will find the PIC16LF18345 a strong fit for cost- and power-sensitive designs.
When designing with this device, ensure the supply decoupling is placed within 5 mm of the VDD pin and that the PPS unlock sequence (PPSLOCK register) is followed before changing pin mappings to avoid unintended peripheral disablement. For ultra-low standby designs, configure the device to enter sleep with the ADC disabled, internal oscillator off, and peripherals gated to minimize quiescent draw below 100 nA.
This page synthesizes distributor pricing, pin-compatible drop-in alternatives, and practical low-power design notes that go beyond the manufacturer datasheet's typical application discussion.
Drop-in alternatives for PIC16LF18345-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 PIC16LF18345-I/SS (same form factor and footprint) — differing in Package, Operating Temperature, Communication, DAC, ADC.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F18345-I/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LF18344-I/SS
✅ Drop-In✓ In Stock
$1.08 / Unit
View Datasheet →PIC16LF18346-I/SS
✅ Drop-In✓ In Stock
$1.1 / Unit
View Datasheet →PIC16LF1829-I/SS
✅ Drop-In✓ In Stock
$1.15 / Unit
View Datasheet →PIC16F1776-I/SS
✅ Drop-In✓ In Stock
$2.04 / Unit
View Datasheet →PIC16LF18345-I/SS Maximum Ratings & Electrical Characteristics
| Architecture | 8-bit PIC enhanced mid-range (XLP) |
| Core | PIC16 enhanced mid-range |
| Max CPU Speed | 32 MHz |
| Program Memory (Flash) | 14 KB (8K x 14 words) |
| Data SRAM | 1 KB |
| Data EEPROM | 256 bytes |
| Operating Voltage (VDD) | 1.8 V to 3.6 V |
| I/O Pins | 18 |
| ADC | 10-bit, up to 17 channels |
| DAC | 1 x 5-bit / 10-bit (refer to datasheet) |
| Comparators | 2 |
| Timers | 5 (Timer0, Timer1/3, Timer2/4/6) |
| PWM Modules | 2 (10-bit) |
| Communication | I2C, SPI, USART with PPS |
| Peripheral Pin Select (PPS) | Yes |
| Core Independent Peripherals | CLC, CWG, NCO, ZCD |
| Package | 20-pin SSOP (SS) 5.30 mm body |
| Operating Temperature | -40C to +85C (industrial) |
| Mounting Type | Surface Mount |
| MSL Level | 1 (per JEDEC J-STD-020) |
| RoHS Status | Compliant |
PIC16LF18345-I/SS Pin Configuration
| Pin 1 | VDD — Positive supply voltage (1.8V to 3.6V) |
| Pin 2 | RA5 — Bidirectional I/O / analog input / peripheral pin select |
| Pin 3 | RA4 — Bidirectional I/O / analog input / peripheral pin select |
| Pin 4 | RA3/MCLR — Bidirectional I/O or Master Clear reset (input only) |
| Pin 5 | RC5 — Bidirectional I/O / analog input / peripheral pin select |
| Pin 6 | RC4 — Bidirectional I/O / analog input / peripheral pin select |
| Pin 7 | RC3 — Bidirectional I/O / analog input / peripheral pin select |
| Pin 8 | RC2 — Bidirectional I/O / analog input / peripheral pin select |
| Pin 9 | RC1 — Bidirectional I/O / analog input / peripheral pin select |
| Pin 10 | RC0 — Bidirectional I/O / analog input / peripheral pin select |
| Pin 11 | RA2 — Bidirectional I/O / analog input / peripheral pin select |
| Pin 12 | RA1 — Bidirectional I/O / analog input / peripheral pin select / DAC |
| Pin 13 | RA0 — Bidirectional I/O / analog input / peripheral pin select / DAC |
| Pin 14 | VSS — Ground reference |
| Pin 15 | RA7 — Bidirectional I/O / peripheral pin select |
| Pin 16 | RA6 — Bidirectional I/O / peripheral pin select |
| Pin 17 | RC7 — Bidirectional I/O / peripheral pin select |
| Pin 18 | RC6 — Bidirectional I/O / peripheral pin select |
| Pin 19 | RB5 — Bidirectional I/O / analog input / peripheral pin select |
| Pin 20 | RB4 — Bidirectional I/O / analog input / peripheral pin select |
Typical Applications
PIC16LF18345-I/SS is suitable for 6 applications: Battery-Powered IoT Sensor Nodes, Low-Power Remote Controls, HVAC Thermostat and Building Controls, LED Lighting Controllers, Small Motor and Fan Controllers, Consumer White Goods.
Battery-Powered IoT Sensor Nodes
The PIC16LF18345-I/SS is purpose-built for coin-cell powered IoT sensor nodes where standby current, not MIPS, dominates lifetime. With XLP nanoWatt sleep currents in the tens of nanoamps and Core Independent Peripherals (CLC, NCO, ZCD) handling sensor-edge events without waking the CPU, designs regularly achieve multi-year battery life on a single CR2032. The 1.8 V minimum VDD directly supports primary lithium chemistries without a boost converter. The 10-bit ADC with up to 17 channels can simultaneously scan multiple analog sensors in low-power scan mode, while the on-chip temperature sensor and internal 32 kHz oscillator remove the need for external components. Pair this MCU with an external sub-GHz or BLE transceiver (such as the MRF89XA or RN4870) and you have a compact sensor-to-cloud transceiver edge platform on a few square centimeters of PCB.
Recommended
Low-Power Remote Controls
Handheld remote controls for consumer electronics, industrial cranes, and smart-home systems benefit from the PIC16LF18345-I/SS's combination of low standby draw, capacitive-touch sensing through the Peripheral Touch Controller, and fast wake on key-press. The 20-pin SSOP package fits comfortably in thin plastic enclosures, while the integrated hardware AES peripheral supports encrypted key-pairing in security-conscious designs. The CWG peripheral generates IR carrier waveforms without CPU involvement, so the MCU stays asleep except during the actual transmit pulse. Battery life exceeding 5 years on 2 x AAA cells is typical. The -40C to +85C industrial temperature grade covers outdoor and garage installations where consumer-grade MCUs would fail.
Recommended
HVAC Thermostat and Building Controls
The PIC16LF18345-I/SS fits HVAC thermostat and building-automation designs that demand reliable operation across wide temperature swings and supply noise. The 1.8 V to 3.6 V operating range allows direct connection to 2-cell AA backup batteries during power-line outages, while the 10-bit ADC simultaneously reads temperature, humidity, and occupancy sensors. The hardware PWM modules drive TRIAC-controlled fan and damper actuators with minimal CPU load, and the Peripheral Pin Select (PPS) remaps communication interfaces when PCB layout constraints change late in the design. With industrial-grade -40C to +85C temperature support, the MCU operates inside rooftop HVAC enclosures where temperatures routinely exceed 60C in summer.
Recommended
LED Lighting Controllers
Architectural and decorative LED lighting controllers rely on the PIC16LF18345-I/SS's CWG (Complementary Waveform Generator) and 10-bit PWM modules to drive high-current MOSFET half-bridges for RGB and tunable-white LED strips. The CWG generates complementary PWM signals with programmable dead time, eliminating shoot-through in the half-bridge without software overhead. The NCO (Numerically Controlled Oscillator) provides high-resolution frequency synthesis for DALI or 0-7V analog dimming interfaces. With the LF variant operating down to 1.8 V, designs can use a single-cell Li-ion supply. Multi-channel LED controllers in commercial spaces benefit from the wide operating temperature and the on-chip EUSART for DMX-512 and DALI communication.
Recommended
Small Motor and Fan Controllers
Brushless DC (BLDC) and brushed motor controllers for small appliances and fans integrate well with the PIC16LF18345-I/SS thanks to its CWG and zero-cross detect (ZCD) peripherals. ZCD detects AC line zero-crossings for TRIAC-based fan dimming without an optocoupler in some topologies, while the CWG generates complementary gate-drive waveforms with hardware dead time for sensorless BLDC commutation. The PIC16LF18345's 32 MHz CPU runs field-oriented control (FOC) loops for sub-100W motors at modest RPM, and PPS allows late-stage remapping of PWM outputs when MOSFET selection forces PCB redesign. Industrial-grade temperature support and the LF variant's 1.8 V minimum VDD support battery and DC-bus power topologies.
Recommended
Consumer White Goods
Microwave ovens, washing machines, dishwashers, and other white goods benefit from the PIC16LF18345-I/SS's blend of affordability, peripheral richness, and long-term Microchip supply. The 10-bit ADC reads temperature, water level, and motor current simultaneously, while the CLC peripheral combines sensor signals to generate fault interrupts without CPU intervention. The Peripheral Pin Select (PPS) enables designers to migrate pin assignments between engineering revisions without PCB respins, accelerating time-to-market in cost-sensitive consumer categories. The industrial temperature grade survives the hot, humid interior of a dishwasher or washing-machine chassis. With RoHS-compliant Pb-free packaging and 20-pin SSOP form factor, the PIC16LF18345-I/SS is a natural fit for high-volume consumer-electronics production.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LF18345-I/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F18345-I/SS | PIC16LF18344-I/SS | PIC16LF18346-I/SS | PIC16LF1829-I/SS | PIC16F1776-I/SS |
|---|---|---|---|---|---|---|
| Package | 20-SSOP | 20-SSOP | 20-SSOP | 20-SSOP | 20-SSOP | 20-SSOP |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory (Flash) | 14 KB | 14 KB | 7 KB | 28 KB | 8 KB | 8 KB |
| Data SRAM | 1 KB | 1 KB | 1 KB | 2 KB | 1 KB | 1 KB |
| Operating Voltage | 1.8 V to 3.6 V | 2.3 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 | 2.3 V to 5.5 V |
| Max CPU Speed | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Peripheral Pin Select (PPS) | Yes | Yes | Yes | Yes | Yes | Yes |
| ADC | 10-bit, 17 channels | 10-bit, 17 channels | 10-bit, 17 channels | 10-bit, 17 channels | 10-bit, 12 channels | 10-bit, 17 channels |
| Core Independent Peripherals (CLC/CWG/NCO/ZCD) | Yes (all) | Yes (all) | Yes (all) | Yes (all) | CLC only | CLC and op-amps |
| Industrial Temperature Range | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
Key Differentiators
- Newer XLP generation with full Core Independent Peripheral suite (vs PIC16LF1829-I/SS)
- Lowest operating voltage in PIC16LF 20-pin family (vs PIC16F18345-I/SS)
- Optimal balance of memory, peripherals, and price in 20-SSOP package (vs PIC16LF18344-I/SS)
Design Notes
The PIC16LF18345-I/SS supports XLP nanoWatt sleep currents in the tens of nanoamps. Estimated: with all peripherals off and CPU idle, typical sleep current is around 30-60 nA at 1.8 V. For multi-year battery life, gate the ADC and internal oscillator during sleep, use the WDT as the only wake source, and minimize active-mode time by offloading periodic tasks to the CLC or NCO peripherals that operate without CPU intervention.
Place the VDD decoupling capacitor (typically 100 nF X7R ceramic) within 5 mm of the VDD pin (pin 1). For designs exposed to high-noise motor or relay loads, add a 10 uF bulk capacitor near the IC and series ferrite beads on the supply rail. The 20-pin SSOP package has a thermal resistance around 90 C/W theta_JA; power dissipation is not a concern at these clock frequencies but copper pour under the exposed pad region is not present on this package.
Leverage Peripheral Pin Select (PPS) for late-stage pin reassignment. PPSLOCK must be unlocked before PPS modifications take effect - implement a sequence in firmware that writes the unlock key, modifies PPS registers, and then re-locks to prevent accidental pin remapping. For high-speed SPI or EUSART traces, keep ground returns continuous and avoid routing analog signals (ADC, comparator) parallel to digital switching lines for more than 5 mm to minimize coupling.
Do not exceed 3.6 V VDD on the LF variant - the standard PIC16F18345 is required for 5 V operation. Configure unused I/O pins as outputs driving low (not high-impedance inputs) to minimize supply leakage and pin-floating-induced ADC noise. When using the internal oscillator above 16 MHz, ensure the FOSC configuration bits are set to HS or INTOSC with PLL as required to avoid peripheral timing errors.
Compliance Information
RoHS compliant, Pb-free, MSL-1 per JEDEC J-STD-020. Not AEC-Q100 qualified - choose automotive-grade PIC18 or PIC24 families for vehicle applications. Halogen-free per Microchip's product compliance datasheet.
