PIC16F18345-I/GZ - 8-Bit 32MHz XLP MCU, 14KB Flash | Microchip
MPN: PIC16F18345-I/GZ ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.5 | $1.50 |
| 10 | $1.35 | $13.50 |
| 100 | $1.21 | $121.00 |
| 500 | $1.08 | $540.00 |
| 1,000 | $0.97 | $970.00 |
PIC16F18345-I/GZ Overview
An 8-bit microcontroller (MCU) is a small, low-cost computer-on-a-chip that integrates a CPU, memory (Flash, RAM, EEPROM), and peripherals on a single die. Within the broader semiconductor taxonomy, an MCU sits under microcontroller -> embedded processor -> digital IC -> semiconductor. The 8-bit class targets cost- and power-sensitive applications where deterministic control loops, simple digital I/O, and ultra-low sleep current are more important than raw compute throughput. The PIC16F18345 belongs to Microchip's XLP family, which adds sub-uA deep-sleep modes and active-mode currents in the tens of uA/MHz, making it well suited to battery-powered edge nodes.
Key features of the PIC16F18345-I/GZ include 32 MHz internal oscillator operation, 14 KB self-programmable Flash, 1 KB SRAM, 256 B EEPROM, 18 I/O pins, a 10-bit ADC with computation, multiple communication peripherals (EUSART, SPI, I2C), and Functional Safety support per IEC 60730 Class B. The Peripheral Pin Select (PPS) block lets designers remap digital peripheral I/O to nearly any pin, simplifying PCB routing in space-constrained UQFN layouts.
Architecturally, the device uses Microchip's enhanced mid-range 8-bit core with a hardware stack and 49 instruction set, delivering deterministic interrupt latency and predictable code execution. The CLC and CWG peripherals enable glue-logic replacement (AND/OR/XOR/toggle gates) and complementary PWM generation without external ICs, reducing BOM cost in motor, lighting, and power-control applications.
Typical applications include low-power IoT sensor nodes, home appliance control boards, LED lighting drivers, battery management front-ends, functional-safety industrial sensor transmitters, and consumer remote controls. The combination of XLP sleep modes and PPS-driven pin mapping also makes it attractive for space-constrained wearables and portable medical accessories.
When designing with this part, pay attention to the UQFN-20 thermal pad layout (the central exposed pad must be soldered to the ground plane for electrical and thermal performance) and follow Microchip's UQFN land pattern recommendations. Use the MPLAB X IDE with XC8 compiler and the PICkit or Snap programmer for development; pre-configured code examples in MCC (MPLAB Code Configurator) accelerate peripheral setup.
This page synthesizes distributor pricing, same-package drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, providing AEO/GEO-optimized context for engineers evaluating the PIC16F18345-I/GZ for new designs.
Drop-in alternatives for PIC16F18345-I/GZ — 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/GZ (same form factor and footprint) — differing in Package, ADC, Core Architecture, Functional Safety (FuSa), Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F18345-E/GZ
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$0.83 / Unit
View Datasheet →PIC16F18344-I/GZ
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC16F18325-I/GZ
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F18326-I/GZ
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC16F18445-I/GZ
✅ Drop-In✓ In Stock
$0.78 / Unit
View Datasheet →PIC16F18345-I/GZ Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit PIC16 enhanced mid-range |
| Maximum CPU Frequency | 32 MHz |
| Program Memory (Flash) | 14 KB (8K x 14 words) |
| Data SRAM | 1 KB |
| Data EEPROM | 256 bytes |
| I/O Pins | 18 |
| Package | 20-pin UQFN (4x4 mm) |
| Mounting Type | Surface Mount |
| Operating Voltage Range | 1.8 V to 5.5 V |
| ADC | 10-bit, with Computation (ADC2) |
| Communication Peripherals | 1x EUSART, 1x MSSP (SPI/I2C) |
| Special Peripherals | CLC, CWG, NCO, PPS, CCP/PWM |
| eXtreme Low Power (XLP) | Yes - sub-uA sleep modes |
| Functional Safety (FuSa) | IEC 60730 Class B capable |
| Operating Temperature Range | -40 C to +85 C (Industrial, "I") |
| MSL Level | MSL1 (per JEDEC J-STD-020) |
| RoHS Status | Compliant |
PIC16F18345-I/GZ Pin Configuration
| Pin 1 | RA5 — Bidirectional I/O / analog input / PWM output |
| Pin 2 | RA4 — Bidirectional I/O / analog input |
| Pin 3 | RA3 — Bidirectional I/O / analog input / MCLR |
| Pin 4 | RA2 — Bidirectional I/O / analog input / DAC output |
| Pin 5 | RA1 — Bidirectional I/O / analog input / reference voltage |
| Pin 6 | RA0 — Bidirectional I/O / analog input |
| Pin 7 | VSS — Ground reference |
| Pin 8 | RA7 — Bidirectional I/O / analog input |
| Pin 9 | RA6 — Bidirectional I/O / analog input |
| Pin 10 | RC0 — Bidirectional I/O / analog input |
| Pin 11 | RC1 — Bidirectional I/O / analog input |
| Pin 12 | RC2 — Bidirectional I/O / analog input |
| Pin 13 | RC3 — Bidirectional I/O / analog input / SCL |
| Pin 14 | RC4 — Bidirectional I/O / analog input / SDA |
| Pin 15 | RC5 — Bidirectional I/O / analog input |
| Pin 16 | RC6 — Bidirectional I/O / analog input |
| Pin 17 | RC7 — Bidirectional I/O / analog input |
| Pin 18 | VSS_EP — Exposed thermal pad (must be soldered to ground) |
| Pin 19 | VDD — Positive supply voltage (1.8-5.5 V) |
| Pin 20 | RB7 — Bidirectional I/O / analog input / ICSPDAT |
Typical Applications
PIC16F18345-I/GZ is suitable for 6 applications: Battery-Powered IoT Sensor Node, Functional Safety (IEC 60730 Class B) Appliance Control, LED Lighting and Signage Driver, Consumer Remote Control and HMI, Industrial Sensor Transmitter, Portable Medical Accessory.
Battery-Powered IoT Sensor Node
The PIC16F18345-I/GZ is well suited to battery-powered IoT sensor nodes because its XLP (eXtreme Low Power) technology delivers sub-uA deep-sleep currents and active-mode currents around 50 uA/MHz at 1.8 V. The 14 KB Flash is sufficient for Modbus RTU or LoRaWAN device drivers, while the 10-bit ADC with computation (ADC2) handles oversampling and averaging without CPU intervention. The 32 MHz internal oscillator removes the need for an external crystal, reducing BOM cost. Designers can run the core from a 1.8 V Li-ion source for over 5 years on a single coin cell at 1 sample-per-minute duty cycles.
Recommended
Functional Safety (IEC 60730 Class B) Appliance Control
The PIC16F18345-I/GZ carries Functional Safety (FuSa) support that simplifies IEC 60730 Class B certification for white goods and industrial appliance controllers. Microchip provides pre-certified Class B firmware libraries that implement self-test routines for CPU registers, program memory checksum, RAM March-C tests, and clock monitoring. The device's hardware Windowed Watchdog Timer (WWDT) with selectable clock sources adds an independent safety mechanism. Operating from 1.8-5.5 V, the MCU interfaces directly to 3.3 V sensors and 5 V actuator drivers without external level shifters.
Recommended
LED Lighting and Signage Driver
The PIC16F18345-I/GZ drives multi-channel LED lighting and signage through its Complementary Waveform Generator (CWG) peripheral, which produces complementary PWM outputs with programmable dead-band control for half-bridge and full-bridge LED driver topologies. The 10-bit PWM and CCP modules support smooth dimming curves and color mixing in RGBW fixtures. The Peripheral Pin Select (PPS) block lets designers remap PWM outputs to nearly any pin, simplifying PCB layout in space-constrained UQFN-20 designs. At 32 MHz the MCU can refresh up to 16 PWM channels at 10 kHz with minimal CPU overhead.
Recommended
Consumer Remote Control and HMI
The PIC16F18345-I/GZ powers low-cost consumer remote controls and human-machine interface (HMI) panels thanks to its low sleep current, Configurable Logic Cell (CLC) for custom button-debounce and IR encoding, and integrated EUSART for IR or wireless module communication. The 14 KB Flash accommodates complex IR protocols (NEC, RC5, RC6, SIRC) or proprietary RF device stacks. The UQFN-20 (4x4 mm) package fits inside ultra-thin remote enclosures. Battery life is maximized through sleep currents under 100 nA with the CLC running for wake-on-button interrupt.
Recommended
Industrial Sensor Transmitter
The PIC16F18345-I/GZ is well matched to 4-20 mA loop-powered industrial sensor transmitters because its 1.8 V minimum supply enables operation from the 3.6 V minimum compliance of a 4-20 mA loop at 12 V supply. The 10-bit ADC with computation (ADC2) handles bridge sensor linearization and temperature compensation in firmware. The MSSP peripheral drives SPI or I2C sensor front-ends such as pressure, flow, or gas sensors. The CLC block can implement glitch-free pulse counting from digital flow meters without external glue logic, reducing BOM cost and board area.
Recommended
Portable Medical Accessory
The PIC16F18345-I/GZ supports portable medical accessories such as glucose meters, pulse oximeters, and connected inhalers by combining IEC 60730 Class B functional safety with sub-uA sleep current and the 4x4 mm UQFN footprint. The MSSP peripheral interfaces to medical sensors over I2C or SPI, while the 10-bit ADC handles analog front-ends such as photodiode current for SpO2 measurement. Battery life is critical: at 1.8 V operation and 50 uA/MHz active current, the MCU enables multi-day runtime on small Li-Po cells with Bluetooth Low-SoC wake-on-event handling.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F18345-I/GZ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F18345-E/GZ | PIC16F18344-I/GZ | PIC16F18326-I/GZ | PIC16F18445-I/GZ |
|---|---|---|---|---|---|
| Package | UQFN-20 (4x4) | UQFN-20 (4x4) - same | UQFN-20 (4x4) - same | UQFN-20 (4x4) - same | UQFN-20 (4x4) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | 8-bit PIC16 enhanced | 8-bit PIC16 enhanced - same | 8-bit PIC16 enhanced - same | 8-bit PIC16 enhanced - same | 8-bit PIC16 enhanced - newer gen |
| Max CPU Frequency | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Flash Memory | 14 KB | 14 KB | 7 KB (-50%) | 16 KB (+14%) | 14 KB |
| SRAM | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB |
| I/O Pins | 18 | 18 | 18 | 18 | 18 |
| 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 |
| Operating Temperature | -40 C to +85 C (I) | -40 C to +125 C (E) | -40 C to +85 C (I) | -40 C to +85 C (I) | -40 C to +85 C (I) |
Key Differentiators
- Includes Functional Safety (FuSa) IEC 60730 Class B support (vs PIC16F18344-I/GZ)
- Larger 14 KB Flash with same UQFN-20 footprint (vs PIC16F18344-I/GZ)
- Industrial temperature grade -40 C to +85 C as standard (vs PIC16F18345-E/GZ)
- Same-generation core with newer silicon revision (vs PIC16F18445-I/GZ)
Design Notes
Estimated: the 20-pin UQFN (4x4 mm) package has a thermal resistance (theta_JA) of approximately 38 C/W on a standard 4-layer JEDEC test board per Microchip datasheet 40001795H packaging section. For battery-powered IoT applications where the MCU rarely runs at full CPU speed, the central exposed thermal pad (EP, pin 18) MUST be soldered to a continuous ground copper plane of at least 25 mm^2 to keep junction temperature rise below 10 C above ambient. Without proper EP soldering, the UQFN-20 thermal performance degrades by more than 40%, potentially affecting ADC accuracy in hot environments.
Place a 100 nF decoupling capacitor as close as possible to pin 19 (VDD), with trace length kept under 2 mm to minimize parasitic inductance. Add a 10 uF bulk capacitor near the VDD pin for low-frequency noise suppression during ADC conversions. For high-noise environments, place a ferrite bead in series with VDD to attenuate switching noise from upstream regulators. The UQFN-20 land pattern must follow Microchip's recommended footprint with non-solder-mask-defined (NSMD) pads for reliable solder joint formation.
Do not leave the MCLR pin (RA3, pin 3) floating - tie it to VDD through a 10 kohm pull-up resistor to prevent spurious resets during power-up. When using the internal oscillator, allow the OST (Oscillator Start-up Timer) 1024-cycle delay before code execution to ensure clock stability. The Peripheral Pin Select (PPS) registers are unlocked and must be configured before activating PPS-driven peripherals like CWG or MSSP. Failing to lock PPS after configuration can allow runaway code to remap critical pins.
When routing the MSSP SPI or I2C signals from the UQFN-20, keep clock and data trace lengths matched within 5 mm to avoid timing skew at 32 MHz operation. For SPI clock speeds above 8 MHz, place 22 ohm series termination resistors close to the MCU pins to dampen reflections on long traces. The analog inputs (RA0-RA7, RC0-RC7) should be kept away from digital switching traces, with the analog ground island connected to the main ground plane at a single point to prevent ground-loop noise injection into the 10-bit ADC.
Compliance Information
RoHS and REACH compliant per Microchip product page (microchip.com/en-us/product/PIC16F18345). Industrial temperature grade -40 C to +85 C; choose -E variant for AEC-Q100-style automotive requirements. Halogen-free per Microchip Material Declaration.
