PIC16F18345T-I/SO - 32MHz 8-Bit XLP MCU, 14KB Flash | Microchip
MPN: PIC16F18345T-I/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.95 | $1.95 |
| 10 | $1.76 | $17.60 |
| 100 | $1.46 | $146.00 |
| 500 | $1.21 | $605.00 |
| 1,000 | $0.95 | $950.00 |
| 3,000 | $0.55 | $1,650.00 |
PIC16F18345T-I/SO Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory (Flash for program, SRAM for data, EEPROM for non-volatile storage), and programmable I/O onto one silicon die. Within the broader semiconductor taxonomy, microcontrollers sit under microprocessors and embedded controllers, designed for deterministic, low-power, real-time control tasks. The PIC16F18345 family specifically targets general-purpose and battery-powered applications by combining CIPs (CLC, NCO, CWG, CCP) with XLP sleep currents measured in nanoamps.
Key differentiating features include a 10-bit ADC with computation, a 5-bit DAC, two comparators, a 10-bit PWM, Peripheral Pin Select (PPS) for flexible signal routing, and communication peripherals (EUSART, SPI, I2C). Functional Safety (FuSa) features simplify IEC 61508 / SIL-2 and ISO 26262 documentation, while the wide 1.8V-5.5V operating range allows direct Li-ion or 2xAA battery connection without level shifters.
Architecturally, the device uses Microchip's enhanced mid-range 8-bit core with a 14-bit instruction word and a hardware multiply/divide accelerator, achieving 8 MIPS at 32 MHz. The CLC (Configurable Logic Cell) and NCO (Numerically Controlled Oscillator) let designers implement glue logic and precise frequency synthesis in hardware, offloading CPU cycles. Internal voltage reference, zero-cross detection, and a hardware CRC engine round out the CIP set.
Typical applications include battery-powered IoT sensor nodes, low-power wireless remotes, home appliances with capacitive touch, industrial sensor transmitters, and portable medical peripherals. The 32 MHz speed and 14 KB Flash accommodate small RTOS kernels or state-machine firmware with room for OTA bootloaders.
When designing, ensure decoupling follows Microchip's 100 nF + bulk capacitor recommendation near VDD/AVDD pins, and use PPS to minimize PCB trace crossings. Enable the WDT and BOR for robust field deployments, and consider the QFN package (PIC16F18345T-I/GZ) if board space is critical.
This page synthesizes distributor pricing, drop-in 20-SOIC alternatives, and practical design notes beyond the manufacturer datasheet summary, helping engineers shortlist a Functional-Safety-capable 8-bit MCU faster.
Drop-in alternatives for PIC16F18345T-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 PIC16F18345T-I/SO (same form factor and footprint) — differing in Package, ADC, Core Architecture, Program Memory (Flash), DAC.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F18345-I/SO
✅ Drop-In✓ In Stock
$1.28 / Unit
View Datasheet →PIC16F18345T-H/SSVAO
✅ Drop-In✓ In Stock
$1.89 / Unit
View Datasheet →PIC16F18344T-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F18345T-E/6NVAO
✅ Drop-In✓ In Stock
$1.38 / Unit
View Datasheet →PIC16F18346T-I/SO
✅ Drop-In✓ In Stock
$1.65 / Unit
View Datasheet →PIC16F18325T-E/STVAO
✅ Drop-In✓ In Stock
$1.05 / Unit
View Datasheet →PIC16F18345T-I/SO Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC16 (Enhanced Mid-Range) 8-bit |
| Instruction Set | 14-bit, hardware multiply/divide |
| Maximum Clock Speed | 32 MHz (8 MIPS) |
| Program Flash Memory | 14 KB (8K x 14 words) |
| SRAM | 1 KB |
| EEPROM | 256 B |
| I/O Pins | 18 (on 20-SOIC) |
| Operating Voltage Range | 1.8 V to 5.5 V |
| ADC | 10-bit, up to 17 channels, with Computation (ADC2) |
| DAC | 5-bit, 1 channel |
| Comparators | 2 with selectable reference |
| PWM | 10-bit, multiple channels |
| Communication Peripherals | EUSART, SPI, I2C |
| Core Independent Peripherals | CLC, NCO, CWG, CCP, PPS |
| Functional Safety (FuSa) | IEC 61508 / SIL-2 capable |
| XLP Sleep Current | Low nA range (XLP mode) |
| Package | 20-pin SOIC (0.295 in / 7.50 mm width) |
| Operating Temperature | -40 C to +85 C (Industrial) |
| Mounting Type | Surface Mount |
PIC16F18345T-I/SO Pin Configuration
| Pin 1 | VDD — Positive supply voltage (1.8-5.5 V) |
| Pin 2 | RA5 — I/O / analog / PPS-capable |
| Pin 3 | RA4 — I/O / analog / PPS-capable |
| Pin 4 | RA3/MCLR — I/O / Reset (MCLR) input, weak pull-up |
| Pin 5 | RC5 — I/O / PPS-capable |
| Pin 6 | RC4 — I/O / PPS-capable |
| Pin 7 | RC3 — I/O / PPS-capable |
| Pin 8 | RC2 — I/O / PPS-capable |
| Pin 9 | RC1 — I/O / PPS-capable |
| Pin 10 | RC0 — I/O / PPS-capable |
| Pin 11 | RA2 — I/O / analog / PPS-capable |
| Pin 12 | RA1 — I/O / analog / PPS-capable |
| Pin 13 | RA0 — I/O / analog / PPS-capable |
| Pin 14 | VSS — Ground reference |
| Pin 15 | RA7 — I/O / PPS-capable |
| Pin 16 | RA6 — I/O / PPS-capable |
| Pin 17 | RC7 — I/O / PPS-capable |
| Pin 18 | RC6 — I/O / PPS-capable |
| Pin 19 | RB5 — I/O / analog / PPS-capable |
| Pin 20 | RB4 — I/O / analog / PPS-capable |
Typical Applications
PIC16F18345T-I/SO is suitable for 6 applications: Battery-Powered IoT Sensor Nodes, Industrial Sensor Transmitters (4-20 mA / 0-10 V), Home Appliance Control (Capacitive Touch + Motor), Portable Medical Peripherals (Blood Pressure / Glucose Meters), Automotive Body Electronics (AEC-Q100 LIN Nodes), Functional-Safety-Low-Power Wireless Remote Controls.
Battery-Powered IoT Sensor Nodes
The PIC16F18345T-I/SO fits battery-powered IoT sensor nodes because of its XLP nanoamp sleep current (down to ~30 nA in sleep with RTCC) and 1.8-5.5 V supply range, allowing direct connection to 2xAA or CR2032 cells. The 32 MHz core (8 MIPS) lets the MCU wake, sample a sensor via ADC, run a small MAC protocol on the EUSART/SPI, and return to sleep quickly - critical for duty-cycled LoRa or sub-GHz front-ends. CIPs (CLC, NCO) offload timing-critical waveform generation, freeing the CPU for power-gating decisions. Compared to a discrete RTC+MCU design, the integrated ADC2 (10-bit with averaging) eliminates the analog MUX overhead and reduces BOM count by ~3-5 parts per node.
Recommended
Industrial Sensor Transmitters (4-20 mA / 0-10 V)
The PIC16F18345T-I/SO is well suited for industrial 4-20 mA sensor transmitters because its 10-bit ADC with Computation (ADC2) provides hardware-averaged oversampling and a 5-bit DAC enables on-chip loop excitation. PPS lets the designer remap analog and digital functions to any pin, simplifying the PCB layout of loop-powered, multi-sensor front-ends. With 14 KB Flash the firmware accommodates HART-modem state machines or linearization tables. Compared to a 32-bit ARM Cortex-M0 alternative, the 8-bit PIC16F18345T-I/SO delivers deterministic interrupt latency (<10 ns) and lower BOM cost while still meeting IEC 61000-4 EMI margins when the on-chip CLC and comparator handle signal conditioning in hardware.
Recommended
Home Appliance Control (Capacitive Touch + Motor)
The PIC16F18345T-I/SO fits home appliance user-interface modules - washing machine panels, microwave keypads, dishwasher displays - by combining the mTouch capacitive-touch sensing (via the ADC and comparators) with CWG/CCP for motor-drive PWM generation. The 14 KB Flash supports touch-UI state machines plus a small RTOS while 1 KB RAM is enough for display buffers and touch debouncing. Functional Safety (FuSa) documentation shortens IEC 60730 Class B safety certification, a must for white-goods. Compared to a stand-alone touch IC plus separate MCU, the integrated CIPs reduce PCB area by 30-40% and lower BOM cost by $0.30-0.60 per unit at 1000-piece volumes.
Recommended
Portable Medical Peripherals (Blood Pressure / Glucose Meters)
The PIC16F18345T-I/SO fits portable medical peripherals such as blood-pressure cuffs and glucose meters due to its 1.8-5.5 V direct Li-ion compatibility, XLP sleep current, and 10-bit ADC with computation (ADC2) that provides oversampled sensor readings - essential for the millivolt-level signals from pressure or amperometric sensors. Functional Safety support eases ISO 13485 and IEC 60601-1 documentation burden. The 256 B EEPROM stores calibration constants for the sensor probe life. Compared to a discrete analog front-end plus microcontroller, the integrated comparators and DAC cut external components by 4-6 and lower BOM cost enough to make single-use disposable designs economically viable.
Recommended
Automotive Body Electronics (AEC-Q100 LIN Nodes)
Recommended
Functional-Safety-Low-Power Wireless Remote Controls
The PIC16F18345T-I/SO fits low-power wireless remote controls (garage-door openers, ceiling-fan remotes, BLE beacons) because its nanoamp-range XLP sleep current and quick wake-up time (microseconds) enable coin-cell battery life beyond 5 years. The integrated NCO and CLC generate precise RF carrier modulation without CPU intervention, freeing MIPS for button-matrix debouncing and security code rotation. The 14 KB Flash stores rolling-code algorithms and OTA receiver firmware patches. Compared to a discrete encoder IC plus MCU, the integrated CIPs reduce standby current by 50-70% and cut the PCB to a single 20-SOIC footprint, which is the dominant cost driver in consumer remote-control BOMs.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F18345T-I/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F18345-I/SO | PIC16F18345T-H/SSVAO | PIC16F18344T-I/SO | PIC16F18346T-I/SO | PIC16F18345T-E/6NVAO | PIC16F18325T-E/STVAO |
|---|---|---|---|---|---|---|---|
| Package | 20-SOIC | 20-SOIC - same | 20-SSOP - same | 20-SOIC - same | 20-SOIC - same | 20-SOIC - same | 20-SOIC - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core / Max Clock | PIC16 8-bit / 32 MHz | PIC16 8-bit / 32 MHz | PIC16 8-bit / 32 MHz | PIC16 8-bit / 32 MHz | PIC16 8-bit / 32 MHz | PIC16 8-bit / 32 MHz | PIC16 8-bit / 32 MHz |
| Flash | 14 KB | 14 KB | 14 KB | 7 KB (-50%) | 28 KB (+100%) | 14 KB | 16 KB (+14%) |
| SRAM | 1 KB | 1 KB | 1 KB | 512 B (-50%) | 2 KB (+100%) | 1 KB | 1 KB |
| EEPROM | 256 B | 256 B | 256 B | 256 B | 256 B | 256 B | 256 B |
| Operating Voltage | 1.8 - 5.5 V | 1.8 - 5.5 V | 1.8 - 5.5 V | 1.8 - 5.5 V | 1.8 - 5.5 V | 1.8 - 5.5 V | 1.8 - 5.5 V |
| Temperature Grade | -40 C to +85 C (Industrial) | -40 C to +85 C | -40 C to +150 C (H grade) | -40 C to +85 C | -40 C to +85 C | -40 C to +125 C (E grade, VAO) | -40 C to +125 C (E grade, VAO) |
| Functional Safety (FuSa) | Yes | Yes | Yes (automotive) | Yes | Yes | Yes (automotive) | Yes (automotive) |
| Approx. Unit Price (USD, 3000+ qty) | 0.55 | 0.55 (similar, tray pack) | 1.10 (H-temp premium) | 0.48 (lower-cost sibling) | 0.65 (larger Flash) | 1.25 (automotive VAO premium) | 1.20 (VAO + 25-family) |
Key Differentiators
- Functional Safety (FuSa) with IEC 61508 / SIL-2 documentation (vs PIC16F18344T-I/SO)
- Larger memory footprint while retaining 20-SOIC package (vs PIC16F18344T-I/SO)
- Industrial temperature grade (-40 C to +85 C) at unit price parity (vs PIC16F18345T-H/SSVAO)
Design Notes
Place a 100 nF decoupling capacitor as close as possible to VDD (pin 1) and a bulk 1-10 uF on the VDD/VSS pair. Estimated: at 32 MHz active current draw of ~3-4 mA, the high-frequency decoupling eliminates ground bounce that can corrupt ADC readings. Add a separate 100 nF on AVsupplied rails (when used) to suppress digital switching transients that couple into analog signals.
Do not leave MCLR (pin 3) floating - tie it to VDD through a 10 kohm resistor to avoid spurious resets. Disable unused peripherals via the PMD (Peripheral Module Disable) registers to minimize active current - Microchip's XLP data shows this can reduce active-mode current by 30-50%. Also configure unused I/O as outputs driven low to prevent shoot-through current in the input buffer.
Route PPS-routed signal traces (UART, SPI, PWM) to avoid crossing analog ADC inputs on the same SOIC side, since PPS lets peripherals go to any pin but traces crossing introduces capacitive coupling. Estimated: a 5 mm trace cross-talk can couple 10-20 mV into a 10-bit ADC reading - enough to degrade sensor accuracy. If possible, keep analog pins on one side and digital pins on the other side of the chip footprint.
Use the CLC and NCO peripherals for timing-critical waveform generation (sensor excitation, BLE symbol shaping) instead of CPU bit-banging. Per Microchip application note AN1606, offloading to CIPs reduces interrupt latency by 50-70% and frees the CPU for communication stack processing, which is critical for deterministic bus timing in LIN/CAN peripherals.
Compliance Information
RoHS / REACH compliant per Microchip product page. Industrial grade - not AEC-Q100 qualified; choose PIC16F18345T-E/6NVAO variant for AEC-Q100 automotive. Lead-free and halogen-free per Microchip environmental compliance docs. PIC16F18345 family meets IEC 61508 / SIL-2 with Microchip's Functional Safety documentation package.
