PIC16F18445T-I/SS - 14KB Flash 8-Bit MCU | Microchip | 20-SSOP
MPN: PIC16F18445T-I/SS ✓ Hoạt độngPIC16F18445T-I/SS Tóm tắt
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.
Bộ thay thế dễ dàng lắp đặt cho PIC16F18445T-I/SS — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với PIC16F18445T-I/SS (cùng hình factor và footprint) — khác nhau ở ADC, Package, Comparators, PWM Channels, DAC.
PIC16F18445-I/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F18445-E/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F18445-E/SSVAO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F18345T-I/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F18345T-I/SSVAO
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Xem tài liệu →PIC16F18344-I/SS
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Xem tài liệu →PIC16F18445T-I/SS Tỷ lệ tối đa & tính chất điện
| 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 |
| Khoảng nhiệt độ hoạt động | -40C to +85C (industrial, 'I' suffix) |
| Hộp | 20-SSOP (5.30 mm body width) |
| Kiểu lắp đặt | Surface Mount |
| Số chân | 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 |
| Trạng thái RoHS | Compliant (per distributor listings) |
Cấu hình chân PIC16F18445T-I/SS
| Chân 1 | RA5 — Bidirectional I/O with interrupt and PPS; analog-capable |
| Chân 2 | RA4 — Bidirectional I/O with interrupt and PPS |
| Chân 3 | RA3/MCLR — Input only / Master Clear (reset) with internal weak pull-up |
| Chân 4 | RA2 — Bidirectional I/O with interrupt, analog input, DAC output |
| Chân 5 | RA1 — Bidirectional I/O with interrupt, analog input, DAC reference |
| Chân 6 | RA0 — Bidirectional I/O with interrupt, analog input, DAC output |
| Chân 7 | VSS — Ground reference |
| Chân 8 | VDD — Positive supply (1.8 V to 5.5 V) |
| Chân 9 | RA7 — Bidirectional I/O with interrupt, OSC1/CLKI on alternate function |
| Chân 10 | RA6 — Bidirectional I/O with interrupt, OSC2/CLKO on alternate function |
| Chân 11 | RC5 — Bidirectional I/O, analog input, PPS |
| Chân 12 | RC4 — Bidirectional I/O, analog input, PPS |
| Chân 13 | RC3 — Bidirectional I/O, analog input, PPS |
| Chân 14 | RC2 — Bidirectional I/O, analog input, PPS |
| Chân 15 | RC1 — Bidirectional I/O, analog input, PPS, SCL alt |
| Chân 16 | RC0 — Bidirectional I/O, analog input, PPS, SDA alt |
| Chân 17 | RB7 — Bidirectional I/O, ICSP programming data |
| Chân 18 | RB6 — Bidirectional I/O, ICSP programming clock |
| Chân 19 | RB5 — Bidirectional I/O with interrupt, analog input, PPS |
| Chân 20 | RB4 — Bidirectional I/O with interrupt, analog input, PPS |
Ứng dụng tiêu biểu
PIC16F18445T-I/SS phù hợp cho 6 Áp dụngs: 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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16F18445T-I/SS — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | 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) |
Bảo phân biệt quan trọng
- 14 KB Flash is 75% larger than the previous-gen PIC16F18345 family (vsPIC16F18345T-I/SS)
- Functional Safety (FuSa) features and CIP-rich architecture (vsPIC16F1788-I/ML (legacy 8-bit MCU))
- Industrial temperature grade as standard (vsPIC16F18445-E/SSVAO)
Ghi chú thiết kế
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).
Thông tin tuân thủ
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.
