PIC16F18345-I/SO - 8-bit MCU 14KB Flash XLP 20-SOIC | Microchip
MPN: PIC16F18345-I/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.09 | $2.09 |
| 10 | $1.93 | $19.30 |
| 100 | $1.65 | $165.00 |
| 500 | $1.42 | $710.00 |
| 1,000 | $1.28 | $1,280.00 |
PIC16F18345-I/SO Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU, non-volatile program memory, working RAM, and a range of analog and digital peripherals on one die. Within the broader taxonomy, MCUs belong to embedded processors, themselves a subset of microcontrollers and microprocessors within the semiconductor hierarchy. The PIC16F18345 belongs to the PIC16F family of 8-bit PIC microcontrollers, which target general-purpose, low-power, and motor-driven embedded applications.
Key features of this part include a 32 MHz internal oscillator, a 10-bit ADC with computation (ADCC), a 5-bit DAC, two comparators, an 8-bit timer with Hardware Limit Timer (HLT), 10-bit PWM with CCP, and serial interfaces such as EUSART, SPI, and I2C. The device integrates Peripheral Pin Select (PPS), which lets designers remap digital peripherals onto a wide choice of physical pins, simplifying PCB layout and BOM reuse across product variants. Functional Safety (FuSa) features support IEC 61508 SIL-2 capable system designs when the part is used within an FuSa system.
Typical applications include IoT sensor nodes, battery-powered wearables, capacitive-touch user interfaces, LED driving and lighting control, motor control, and low-cost consumer appliances. Its XLP modes and small 20-SOIC footprint also suit it well to space-constrained designs where energy budget is critical, such as remote controls and wireless sensor transmitters.
When designing, keep VDD decoupling within a few millimeters of the supply pins (typically 100 nF plus 10 uF bulk), and verify that MCLR is tied through the recommended resistor network. For low-power run/idle operation, consult the nanoWatt XLP section of the manufacturer datasheet and confirm the wake-up source configuration matches the application duty cycle.
This page synthesizes distributor pricing, drop-in alternatives in the same 20-SOIC footprint, and practical design notes not found on a single distributor page.
Drop-in alternatives for PIC16F18345-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 PIC16F18345-I/SO (same form factor and footprint) — differing in ADC, Operating Temperature, Package, Program Memory (Flash), DAC.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F18345-I/P
✅ Drop-In✓ In Stock
$1.55 / Unit
View Datasheet →PIC16F18345-E/P
✅ Drop-In✓ In Stock
$1.21 / Unit
View Datasheet →PIC16F18344-I/SO
✅ Drop-In✓ In Stock
$0.83 / Unit
View Datasheet →PIC16F18344-E/SO
✅ Drop-In✓ In Stock
$0.77 / Unit
View Datasheet →PIC16F1829-I/SO
✅ Drop-In✓ In Stock
$1.12 / Unit
View Datasheet →PIC16F18345-I/SO Maximum Ratings & Electrical Characteristics
| Product Type | 8-bit Microcontroller (MCU) |
| Family | PIC16F183xx (PIC16F18325/18345) |
| Program Memory (Flash) | 14 KB |
| Data Memory (SRAM) | 1 KB |
| EEPROM | 256 B |
| Maximum CPU Speed | 32 MHz |
| Supply Voltage (VDD) | 1.8 V to 5.5 V |
| Operating Temperature Range | -40 C to +85 C (Industrial, 'I' suffix) |
| Package | 20-pin SOIC (300 mil, SO) |
| Mounting Type | Surface Mount |
| ADC | 10-bit ADC with Computation (ADCC) |
| DAC | 5-bit DAC |
| Comparators | 2 |
| PWM Channels | 10-bit PWM, CCP, CWG |
| Timers | 8-bit HLT timer plus standard 16-bit timers |
| Communication Interfaces | EUSART, SPI, I2C |
| Core Independent Peripherals | CLC, NCO, CWG, PPS |
| Low-Power Modes | XLP (eXtreme Low Power, nanoWatt) |
| Functional Safety | FuSa capable (supports IEC 61508 SIL-2 systems) |
| RoHS Status | Compliant |
PIC16F18345-I/SO Pin Configuration
| Pin 1 | RA5 — Bidirectional I/O with interrupt and PPS (ICSPDAT on some variants) |
| Pin 2 | RA4 — Bidirectional I/O with interrupt |
| Pin 3 | RA3 — Bidirectional I/O with interrupt (also MCLR/VPP on selected variants) |
| Pin 4 | RA1 — Bidirectional I/O with interrupt and PPS |
| Pin 5 | RA0 — Bidirectional I/O with interrupt and PPS |
| Pin 6 | VSS — Ground reference |
| Pin 7 | RA2 — Bidirectional I/O with interrupt and PPS |
| Pin 8 | RC0 — Bidirectional I/O with interrupt and PPS (SOSCO) |
| Pin 9 | RC1 — Bidirectional I/O with interrupt and PPS (SOSCI) |
| Pin 10 | RC2 — Bidirectional I/O with interrupt and PPS |
| Pin 11 | RC3 — Bidirectional I/O with interrupt and PPS (SCL) |
| Pin 12 | RC4 — Bidirectional I/O with interrupt and PPS (SDA) |
| Pin 13 | RC5 — Bidirectional I/O with interrupt and PPS |
| Pin 14 | RC6 — Bidirectional I/O with interrupt and PPS (TX/CK) |
| Pin 15 | RC7 — Bidirectional I/O with interrupt and PPS (RX/DT) |
| Pin 16 | RB7 — Bidirectional I/O with interrupt and PPS |
| Pin 17 | RB6 — Bidirectional I/O with interrupt and PPS (ICSPCLK) |
| Pin 18 | RB5 — Bidirectional I/O with interrupt and PPS |
| Pin 19 | RB4 — Bidirectional I/O with interrupt and PPS |
| Pin 20 | VDD — Positive supply voltage (1.8 V to 5.5 V) |
Typical Applications
PIC16F18345-I/SO is suitable for 6 applications: Battery-Powered IoT Sensor Node, Capacitive-Touch User Interface, LED Lighting and Backlight Control, Low-Cost Motor Control, Remote Control and Consumer Appliance, Industrial Sensor Conditioning.
Battery-Powered IoT Sensor Node
The PIC16F18345-I/SO fits IoT sensor nodes because its XLP nanoWatt modes drop sleep current into the nanoamp range while its 14 KB Flash/1 KB SRAM holds a sensor stack with ADC reads, local processing, and a UART radio driver. PPS remaps the EUSART, SPI, and I2C peripherals onto any convenient pin so the same PCB can carry temperature, humidity, or accelerometer front-ends without layout rework. The 1.8 V to 5.5 V supply range lets it run directly from 2x AA alkaline cells down to a single Li coin cell. Compared with a discrete analog chain, the integrated ADCC plus 5-bit DAC reduces BOM cost and PCB area in a 20-SOIC footprint.
Recommended
Capacitive-Touch User Interface
The PIC16F18345-I/SO drives capacitive-touch buttons and sliders because its Core Independent Peripherals (CLC, NCO, CWG) can scan touches and run PWM in hardware while the CPU sleeps. PPS lets the mTouch channels and the CWG outputs be assigned to any I/O pin, simplifying the routing of a touch PCB. Its 10-bit PWM with CCP handles LED backlight dimming directly, removing the need for an external driver in many UI designs. Compared with a discrete touch IC, the integrated ADCC plus mTouch support reduces BOM cost in the same 20-SOIC footprint.
Recommended
LED Lighting and Backlight Control
The PIC16F18345-I/SO drives LED strips and backlights because its 10-bit PWM with CCP and the Complementary Waveform Generator (CWG) generate high-resolution dimming and dead-band control directly. Its 5-bit DAC and two comparators enable analog current-control loops, while PPS remaps the PWM outputs to the most PCB-friendly pins. XLP modes let the MCU idle when the LEDs are at steady brightness, reducing total system power by tens of percent. Compared with a dedicated LED driver, the integrated CIPs remove the need for an external PWM controller in a 20-SOIC footprint.
Recommended
Low-Cost Motor Control
The PIC16F18345-I/SO drives small DC and stepper motors because its 10-bit PWM with CCP plus CWG generates complementary drive signals with programmable dead time. Its 8-bit HLT (Hardware Limit Timer) provides hardware-based current limiting, while PPS remaps the PWM outputs and comparator inputs to the most PCB-friendly pins. XLP sleep modes reduce standby current when the motor is at rest. Compared with a dedicated motor-control IC, the integrated CIPs remove the need for an external timer and driver in a 20-SOIC footprint.
Recommended
Remote Control and Consumer Appliance
The PIC16F18345-I/SO fits IR remote controls and small consumer appliances because its XLP modes drop standby current into the nanoamp range, extending coin-cell battery life to years. Its IR-friendly timer plus EUSART supports low-duty-cycle TX, while the integrated ADCC reads battery voltage and a couple of buttons without an external analog front-end. PPS remaps the UART, timers, and PWM outputs onto any convenient pin, simplifying the routing of single-layer PCBs. Compared with a discrete remote-control MCU, the integrated ADCC plus EUSART reduces BOM cost in a 20-SOIC footprint.
Recommended
Industrial Sensor Conditioning
The PIC16F18345-I/SO conditions industrial sensor signals because its 10-bit ADCC plus two on-chip comparators handle analog front-ends for thermistors, RTDs, or 4-20 mA loops. Its EUSART, SPI, and I2C interfaces connect to industrial transceivers or isolated UARTs, while the XLP modes let the MCU idle between samples to reduce total system power. PPS remaps the analog and digital peripherals to the most PCB-friendly pins. Compared with a discrete analog chain, the integrated ADCC and comparators reduce BOM cost in the same 20-SOIC footprint.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F18345-I/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F18345-I/P | PIC16F18345-E/P | PIC16F18344-I/SO | PIC16F18344-E/SO | PIC16F18325-I/ST | PIC16F1829-I/SO |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 20-pin SOIC (SO) | 20-pin PDIP (P) | 20-pin PDIP (P) | 20-pin SOIC (SO) | 20-pin SOIC (SO) | 14-pin TSSOP (ST) | 20-pin SOIC (SO) |
| Program Memory (Flash) | 14 KB | 14 KB | 14 KB | 14 KB | 14 KB | 7 KB | 14 KB |
| Data Memory (SRAM) | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB | 512 B | 1 KB |
| EEPROM | 256 B | 256 B | 256 B | 256 B | 256 B | 256 B | 256 B |
| Maximum CPU Speed | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Operating Voltage | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V |
| Temperature Range | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) | -40 C to +125 C (Extended) | -40 C to +85 C (Industrial) | -40 C to +125 C (Extended) | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) |
| PPS / CIP Support | Yes (PPS, CLC, NCO, CWG) | Yes | Yes | Yes | Yes | Yes | No PPS, partial CLC |
Key Differentiators
- Full Core Independent Peripheral (CIP) set (vs PIC16F1829-I/SO)
- Drop-in replacement within the same 20-SOIC footprint (vs PIC16F18344-I/SO)
- Extended-temperature option available (vs PIC16F18345-E/SO)
- Doubled Flash and RAM vs PIC16F18325 (vs PIC16F18325-I/ST)
Design Notes
Place a 100 nF decoupling capacitor within 2-3 mm of the VDD pin (pin 20) and add a bulk 10 uF capacitor on the same rail. For battery-powered designs operating below 2.0 V, the BOR (Brown-Out Reset) trip point should be configured via configuration bits to match the lowest usable battery voltage. The 'I' (industrial) variant operates from 1.8 V to 5.5 V, so a 2x AA alkaline cell stack (3.0 V nominal) or a single Li coin cell (3.0 V nominal) both work without a boost regulator. When entering XLP sleep, configure the wake-up source and IDLE mode bits per the manufacturer datasheet to achieve nanoamp-level quiescent current.
Keep the ICSP pins (RA4/RA5/ICSPCLK/ICSPCLK) accessible for in-circuit programming; route a 6-pin ICSP header even on production PCBs to allow field firmware updates. PPS means the I2C, SPI, and UART pins can be remapped after PCB layout is done, so leave the most flexible pins free if a future pinout change is possible. Use a ground pour under the device, and keep analog traces (ADC input, DAC output) short and away from digital switching lines to preserve ADCC accuracy.
Do not leave the MCLR pin floating - tie it to VDD through the recommended 10 kohm resistor or to the ICSP header, otherwise spurious resets can occur. Configuration bits must be set before the first instruction executes; verify the CONFIG1/CONFIG2 words in code review. Watch out for PPS unlock sequences - peripheral pins must be unlocked before remapping, and the PPSLOCK bit must be cleared to apply changes. For low-power designs, disable unused peripherals in the PMD (Peripheral Module Disable) registers to minimize sleep current.
The internal HFINTOSC drifts with temperature; for UART baud-rate-sensitive applications, use the 16 MHz HFINTOSC with the auto-calibration feature against a system reference, or switch to an external crystal. I2C lines should be pulled up to VDD with 4.7 kohm resistors for 100 kHz operation and 2.2 kohm for 400 kHz, with traces kept under a few centimeters. For SPI at speeds above 4 MHz, keep traces matched in length and use a ground plane to avoid reflections on the SCK line.
Compliance Information
RoHS compliant per Microchip product page. Not AEC-Q100 qualified - choose an AEC-Q100 qualified PIC16F variant for automotive. Functional Safety (FuSa) capable when used within an IEC 61508 SIL-2 system per manufacturer documentation.
