PIC16F18445T-I/SS - 14KB Flash 8-Bit MCU | Microchip | 20-SSOP
MPN: PIC16F18445T-I/SS ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.24 | $2.24 |
| 10 | $2 | $20.00 |
| 100 | $1.78 | $178.00 |
| 500 | $1.55 | $775.00 |
| 1,000 | $1.38 | $1,380.00 |
PIC16F18445T-I/SS Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory (Flash), volatile working memory (RAM), and a rich set of on-chip peripherals such as ADCs, timers, communication interfaces, and digital logic blocks. The PIC16 family uses a modified Harvard 8-bit RISC architecture that executes one instruction per clock cycle (except branches), giving it deterministic timing ideal for hard-real-time control loops. Microcontrollers sit in the embedded systems hierarchy between discrete logic and full microprocessors, enabling compact, low-cost, low-power designs.
Key features of the PIC16F18445T-I/SS include a 12-bit ADC with Computation (ADCC), a 5-bit DAC, two PWM modules, a comparator, a Complementary Waveform Generator (CWG), and serial interfaces including EUSART, SPI, and I2C. Functional Safety (FuSa) capability and CIPs such as the Configurable Logic Cell (CLC) allow hardware-state machines to run autonomously, offloading the CPU. The device supports 1.8V to 5.5V operation with nanoWatt XLP sleep currents in the order of a few microamps, making it suited to battery-powered and energy-harvesting designs.
Typical applications include IoT edge nodes, sensor signal conditioning, low-power wireless sensor interfaces, battery-powered HVAC controls, smart home sensor hubs, and small motor/LED control loops. The trailing 'T' in the part number denotes Tape & Reel packaging, and the 'I' suffix indicates the industrial -40C to +85C operating range. When designing with this part, ensure the configuration words, oscillator selection, and PPS (Peripheral Pin Select) assignments are set in the firmware build - PPS is essential because the I2C, SPI, UART, and PWM functions are remappable to most I/O pins.
Drop-in alternatives for PIC16F18445T-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 PIC16F18445T-I/SS (same form factor and footprint) — differing in ADC, Package, Comparators, PWM Channels, DAC.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F18445-I/SO
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View Datasheet →PIC16F18445-E/SS
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View Datasheet →PIC16F18445-E/SSVAO
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View Datasheet →PIC16F18345T-I/SS
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View Datasheet →PIC16F18345T-I/SSVAO
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View Datasheet →PIC16F18344-I/SS
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View Datasheet →PIC16F18445T-I/SS Maximum Ratings & Electrical Characteristics
| Series | PIC16F184xx (XLP, Functional Safety) |
| Core | 8-bit PIC RISC, 1 instruction/clock cycle |
| Program Memory (Flash) | 14 KB (8K x 14 words) |
| RAM | 1KB |
| Maximum CPU Speed | 32 MHz |
| Operating Voltage Range | 1.8 V to 5.5 V |
| Operating Temperature Range | -40C to +85C (industrial, 'I' suffix) |
| Package | 20-SSOP (5.30 mm body width) |
| Mounting Type | Surface Mount |
| Pin Count | 20 |
| ADC | 12-bit ADCC with computation |
| DAC | 5-bit DAC |
| PWM Channels | 2 x 10-bit PWM |
| Comparators | On-chip analog comparator |
| Serial Interfaces | EUSART, SPI, I2C |
| Special Peripherals | CWG (Complementary Waveform Generator), CLC (Configurable Logic Cell), PPS (Peripheral Pin Select) |
| Low-Power Features | XLP nanoWatt technology, multiple sleep modes |
| RoHS Status | Compliant (per distributor listings) |
PIC16F18445T-I/SS Pin Configuration
| Pin 1 | RA5 — Bidirectional I/O with interrupt and PPS; analog-capable |
| Pin 2 | RA4 — Bidirectional I/O with interrupt and PPS |
| Pin 3 | RA3/MCLR — Input only / Master Clear (reset) with internal weak pull-up |
| Pin 4 | RA2 — Bidirectional I/O with interrupt, analog input, DAC output |
| Pin 5 | RA1 — Bidirectional I/O with interrupt, analog input, DAC reference |
| Pin 6 | RA0 — Bidirectional I/O with interrupt, analog input, DAC output |
| Pin 7 | VSS — Ground reference |
| Pin 8 | VDD — Positive supply (1.8 V to 5.5 V) |
| Pin 9 | RA7 — Bidirectional I/O with interrupt, OSC1/CLKI on alternate function |
| Pin 10 | RA6 — Bidirectional I/O with interrupt, OSC2/CLKO on alternate function |
| Pin 11 | RC5 — Bidirectional I/O, analog input, PPS |
| Pin 12 | RC4 — Bidirectional I/O, analog input, PPS |
| Pin 13 | RC3 — Bidirectional I/O, analog input, PPS |
| Pin 14 | RC2 — Bidirectional I/O, analog input, PPS |
| Pin 15 | RC1 — Bidirectional I/O, analog input, PPS, SCL alt |
| Pin 16 | RC0 — Bidirectional I/O, analog input, PPS, SDA alt |
| Pin 17 | RB7 — Bidirectional I/O, ICSP programming data |
| Pin 18 | RB6 — Bidirectional I/O, ICSP programming clock |
| Pin 19 | RB5 — Bidirectional I/O with interrupt, analog input, PPS |
| Pin 20 | RB4 — Bidirectional I/O with interrupt, analog input, PPS |
Typical Applications
PIC16F18445T-I/SS is suitable for 6 applications: Battery-Powered IoT Sensor Node, Smart Home Sensor Hub, Low-Power HVAC Control Module, Portable Medical Sensor / Wearable, LED Lighting Control / Color Mixing, Industrial Sensor Transmitter (4-20 mA / Modbus).
Battery-Powered IoT Sensor Node
The PIC16F18445T-I/SS fits IoT sensor nodes because of its 1.8-5.5 V supply range, XLP nanoWatt sleep currents, and 12-bit ADCC with computation that handles sensor linearization in hardware. Its Core Independent Peripherals (CIPs) like the CLC let the device wake, sample, threshold-check, and return to sleep without waking the CPU, extending battery life. With 14 KB Flash and 1 KB RAM, the part can hold a small sensor-stack firmware plus a wakeup scheduler; the 20-SSOP footprint keeps the node small.
Recommended
Smart Home Sensor Hub
In a smart home sensor hub, the PIC16F18445T-I/SS aggregates analog and digital inputs from temperature, humidity, occupancy, and gas sensors. The integrated 12-bit ADCC handles multiple sensor channels with hardware averaging, while the EUSART/SPI/I2C peripherals connect to radios or upstream MCUs. The 32 MHz core provides ample headroom for filtering and event-driven logic; 1 KB RAM handles short message buffers before forwarding to a gateway. Industrial temperature grade (-40C to +85C) supports attic and outdoor-rated enclosures.
Recommended
Low-Power HVAC Control Module
The PIC16F18445T-I/SS serves HVAC damper, valve, and sensor modules by combining nanoWatt XLP sleep, configurable CWG for driving triacs/IGBTs, and a 12-bit ADCC for temperature/pressure readout. Its CLCs can implement safety interlocks in hardware, reacting faster than polled firmware. The 5-bit DAC and analog comparator allow closed-loop fan or damper control with minimal external components. With 32 MHz execution and PPS-remappable I/O, design reuse across HVAC platforms is straightforward.
Recommended
Portable Medical Sensor / Wearable
For portable medical wearables, the PIC16F18445T-I/SS brings 1.8-5.5 V operation from a single coin cell, XLP sleep modes under a few microamps, and a 12-bit ADCC for accurate photoplethysmography (PPG) or temperature sensing. Functional Safety (FuSa) features and a deterministic core simplify IEC 62304 / IEC 60730 compliance work. The 20-SSOP package fits wristband form factors, and PPS makes board layout flexible when sensors are repositioned between product SKUs.
Recommended
LED Lighting Control / Color Mixing
In LED lighting control, the PIC16F18445T-I/SS drives multiple PWM channels and uses the Complementary Waveform Generator (CWG) for half-bridge LED drivers with dead-band control. The 12-bit ADCC reads ambient light sensors for closed-loop brightness, and the EUSART/SPI interfaces connect to wireless lighting controllers (Zigbee/BLE modules). The 32 MHz core gives enough headroom for 8-channel DMX-like protocols at low cost, and 14 KB Flash supports rich lighting effect firmware.
Recommended
Industrial Sensor Transmitter (4-20 mA / Modbus)
The PIC16F18445T-I/SS is well-suited for industrial 4-20 mA / Modbus sensor transmitters because it combines 12-bit ADCC accuracy with EUSART (RS-485) and CIPs that handle protocol framing in hardware. The industrial -40C to +85C grade is standard for factory-floor equipment, while the 1.8-5.5 V range simplifies loop-powered designs with boost regulators. CLCs implement alarm latches, and the 14 KB Flash fits Modbus stack plus calibration constants in EEPROM-emulation mode.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F18445T-I/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F18445-I/SO | PIC16F18445-E/SS | PIC16F18445-E/SSVAO | PIC16F18345T-I/SS |
|---|---|---|---|---|---|
| Package | 20-SSOP (Tape & Reel) | 20-SOIC | 20-SSOP - same | 20-SSOP - same | 20-SSOP - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | |
| Program Memory (Flash) | 14 KB (8K x 14) | 14 KB | 14 KB | 8 KB (-43%) | |
| RAM | 1 KB | 1 KB | 1 KB | 1 KB | |
| 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 | |
| CPU Speed | 32 MHz | 32 MHz | 32 MHz | 32 MHz | |
| Temperature Grade | Industrial -40C to +85C | Industrial -40C to +85C | Extended -40C to +125C | Industrial -40C to +85C | |
| Automotive Grade (AEC-Q100) | No | No | Yes (VAO suffix) | Yes (VAO suffix) |
Key Differentiators
- 14 KB Flash is 75% larger than the previous-gen PIC16F18345 family (vs PIC16F18345T-I/SS)
- Functional Safety (FuSa) features and CIP-rich architecture (vs PIC16F1788-I/ML (legacy 8-bit MCU))
- Industrial temperature grade as standard (vs PIC16F18445-E/SSVAO)
Design Notes
Estimated: at VDD=3.3 V with the CPU active at 32 MHz and all peripherals on, the MCU draws roughly 6-8 mA. In sleep with XLP enabled, current drops to a few microamps, which is the recommended operating mode for battery-powered nodes. Always place a 0.1 uF ceramic decoupling capacitor within 3 mm of the VDD pin and a bulk 1 uF-10 uF capacitor at the regulator output. Avoid powering the MCU directly from a noisy switching node; place an LC filter or ferrite bead if so.
Use a star-ground topology for analog and digital grounds, tying them together at a single point near the VSS pin to keep ADC noise low. Route analog signals (RA0-RA2, RC0-RC5, RB4-RB5) away from PWM and switching traces; use a ground guard ring around sensitive analog traces. Place the MCLR pull-up (typically 10 kohm) close to the ICSP header to avoid spurious resets during in-circuit programming.
Common pitfalls include (1) forgetting to disable the analog input when using a digital-only pin, which adds 5-10 mA quiescent draw; (2) leaving PPS unlocked, which prevents remapping; (3) failing to clear the ADC channel-select register before changing channels; and (4) exceeding the absolute maximum VDD of 6.5 V (per datasheet). Always read the configuration-word settings (CONFIG1/CONFIG2/CONFIG3) before the first instruction and verify the oscillator mode matches the hardware (HS, XT, internal LFINTOSC).
Compliance Information
RoHS and lead-free per Microchip product page and distributor listings. Not AEC-Q100 qualified for the I/SS variant; choose PIC16F18445-E/SSVAO for AEC-Q100 automotive.
