PIC16F18446T-I/GZ - 8-bit 32MHz 28KB Flash XLP MCU | Microchip
MPN: PIC16F18446T-I/GZ ✓ Hoạt độngPIC16F18446T-I/GZ Tóm tắt
An 8-bit microcontroller is a small computing-on-a-chip that executes instructions 8 bits wide at a time. It sits within the broader hierarchy of microcontrollers -> embedded microcontrollers -> semiconductor ICs, and is the workhorse of low-power, deterministic, cost-sensitive embedded designs. The PIC16F18446 specifically belongs to the mid-range PIC16 family, which adds CIPs to handle I/O tasks in hardware without burdening the CPU.
Key features of this part include operation from 2.3V to 5.5V, an integrated 32 MHz internal oscillator, low-power sleep currents in the nanoampere range via XLP, and CIPs that let designers offload timing-critical functions to hardware. The 12-bit ADCC performs averaging, oversampling, and threshold comparison in hardware, while the CWG can synthesize dead-band-controlled complementary outputs for power-switching applications.
Architecturally, the PIC16F18446 uses Microchip's enhanced mid-range 8-bit core with a 14-bit instruction word, hardware multiplier, and direct addressing of up to 32KB of Flash. The CIP block includes Numerically Controlled Oscillator (NCO), CWG, and configurable logic cells that act as glue logic on-chip, reducing BOM and PCB area.
Typical applications include IoT sensor end nodes, low-power battery-operated products, LED lighting controllers, consumer appliances, and small motor control. Its 20-pin UQFN footprint suits space-constrained designs.
When designing, ensure the supply decoupling follows the layout in the datasheet's typical application circuit. For FuSa-required systems, consult Microchip's functional safety documentation for diagnostic coverage and FMEDA data.
This page consolidates distributor pricing, drop-in same-package alternatives, and practical design notes drawn from Microchip's PIC16F18446 datasheet and reference designs.
Bộ thay thế dễ dàng lắp đặt cho PIC16F18446T-I/GZ — 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 PIC16F18446T-I/GZ (cùng hình factor và footprint) — khác nhau ở ADC, PWM Channels, DAC, Package, Comparators.
PIC16F18446-I/GZ
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F18446T-I/GZVAO
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
PIC16F18346T-I/GZVAO
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC16F18445T-I/GZ
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F18444T-I/GZ
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F15344T-I/GZ
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16F18446T-I/GZ Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC 8-bit (14-bit instruction word) |
| Family | PIC16(L)F184xx |
| Program Memory (Flash) | 28 KB (16K x 14 words) |
| Data RAM | 2 KB |
| Maximum CPU Speed | 32 MHz |
| Operating Voltage Range | 2.3 V to 5.5 V |
| ADC | 12-bit ADCC with Computation |
| DAC | 5-bit and 8-bit DAC |
| PWM Channels | 2 x 10-bit PWM |
| Comparators | Yes (on-chip) |
| Complementary Waveform Generator (CWG) | Yes |
| Communication Interfaces | EUSART, SPI, I2C |
| Hộp | 20-pin UQFN (4x4 mm) |
| Kiểu lắp đặt | Surface Mount |
| Nhiệt độ hoạt động | -40C to +85C (Industrial) |
| eXtreme Low-Power (XLP) | Yes (nA-range sleep current) |
| Functional Safety (FuSa) | Supported |
| Trạng thái RoHS | Compliant |
Cấu hình chân PIC16F18446T-I/GZ
| Chân 1 | RA0 — Bidirectional I/O / ADC channel |
| Chân 2 | RA1 — Bidirectional I/O / ADC channel / DAC1 output |
| Chân 3 | RA2 — Bidirectional I/O / ADC channel / DAC reference |
| Chân 4 | RA3 — Bidirectional I/O / MCLR (reset, weak pull-up) |
| Chân 5 | RA4 — Bidirectional I/O / ADC channel |
| Chân 6 | RA5 — Bidirectional I/O / ADC channel |
| Chân 7 | VSS — Ground reference |
| Chân 8 | RA6 — Bidirectional I/O / oscillator |
| Chân 9 | RA7 — Bidirectional I/O / oscillator |
| Chân 10 | RB0 — Bidirectional I/O / interrupt-on-change |
| Chân 11 | RB1 — Bidirectional I/O / interrupt-on-change |
| Chân 12 | RB2 — Bidirectional I/O / interrupt-on-change |
| Chân 13 | RB3 — Bidirectional I/O / interrupt-on-change |
| Chân 14 | RB4 — Bidirectional I/O / interrupt-on-change |
| Chân 15 | RB5 — Bidirectional I/O / interrupt-on-change |
| Chân 16 | RB6 — Bidirectional I/O / ICSPCLK / interrupt-on-change |
| Chân 17 | RB7 — Bidirectional I/O / ICSPDAT / interrupt-on-change |
| Chân 18 | VDD — Positive supply voltage (2.3 V to 5.5 V) |
| Chân 19 | VSS — Ground reference |
| Chân 20 | NC — Not connected (per datasheet) |
Ứng dụng tiêu biểu
PIC16F18446T-I/GZ phù hợp cho 6 Áp dụngs: IoT Sensor End Nodes, Battery-Powered Consumer Devices, LED Lighting Controllers, Industrial Sensor Conditioning, Small Motor Control (Fans, Pumps, BLDC), Home Appliance User Interface Boards.
IoT Sensor End Nodes
The PIC16F18446T-I/GZ is purpose-built for IoT sensor end nodes that demand years of battery life from a coin cell or two AA cells. Its XLP technology delivers nanoamp-range sleep current with full RAM retention, while the 12-bit ADCC with Computation oversamples and thresholds in hardware, offloading the CPU. Designers connect analog or digital sensors via SPI or I2C, buffer data through the on-chip 2 KB RAM, and wake the 32 MHz core only for transmission bursts, achieving typical average currents below 5 uA in duty-cycled operation.
Được đề xuất
Battery-Powered Consumer Devices
Battery-powered consumer products benefit from the PIC16F18446T-I/GZ's 2.3V-5.5V supply range, which directly supports 2x alkaline, single Li-ion, or USB power sources without external regulation. The dual 10-bit PWMs drive LEDs, buzzers, or vibration motors, while the CWG synthesizes dead-band-controlled complementary outputs for small DC-DC or Class-D audio stages. XLP sleep currents below 100 nA extend shelf and operational life, and the 20-pin UQFN (4x4 mm) package fits wearable form factors.
Được đề xuất
LED Lighting Controllers
LED lighting applications use the PIC16F18446T-I/GZ's CWG to generate complementary PWM signals with programmable dead-band timing, driving half-bridges for buck or boost LED drivers without external logic. The 12-bit ADCC samples photodiode or current-sense feedback for closed-loop dimming and color mixing, while the 8-bit DAC provides analog reference levels for tunable white or RGB controllers. Sleep current in the nanoamp range suits mains-powered standby regulations.
Được đề xuất
Industrial Sensor Conditioning
Industrial sensor signal conditioning leverages the PIC16F18446T-I/GZ's 12-bit ADCC, 5-bit and 8-bit DACs, and on-chip comparators to build complete analog front-ends in a single IC. The 32 MHz CPU performs linearization, calibration, and HART-style protocol framing for 4-20 mA loops, while the CWG and PWMs generate excitation signals for bridge sensors or LVDTs. The industrial -40C to +85C temperature range and Functional Safety (FuSa) documentation support factory automation designs.
Được đề xuất
Small Motor Control (Fans, Pumps, BLDC)
The PIC16F18446T-I/GZ drives sensorless brushless DC (BLDC) fans, small pumps, and stepper motors using its CWG to generate six-step or sinusoidal complementary PWMs with hardware dead-band insertion. The 12-bit ADCC samples back-EMF for sensorless commutation, while the on-chip comparators provide fast overcurrent protection without external analog ICs. 32 MHz instruction throughput and 28 KB Flash accommodate field-oriented control (FOC) libraries in compact UQFN-20 outline.
Được đề xuất
Home Appliance User Interface Boards
Home appliance HMI boards use the PIC16F18446T-I/GZ to scan capacitive touch buttons via the on-chip CIPs and comparators, drive LED or 7-segment displays through PWMs, and communicate with the main appliance MCU over UART or SPI. The XLP sleep mode enables battery-backed clock and timer functions on cordless appliances. The 4x4 mm UQFN-20 footprint fits behind display panels where board space is at a premium.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16F18446T-I/GZ — 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 | PIC16F18446-I/GZ | PIC16F18445T-I/GZ | PIC16F18444T-I/GZ | PIC16F18346T-I/GZ | PIC16F15344T-I/GZ |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 20-pin UQFN (4x4 mm, GZ) | 20-pin UQFN (4x4 mm, GZ) - same | 20-pin UQFN (4x4 mm, GZ) - same | 20-pin UQFN (4x4 mm, GZ) - same | 20-pin UQFN (4x4 mm, GZ) - same | 20-pin UQFN (4x4 mm, GZ) - same |
| Program Flash | 28 KB | 28 KB | 14 KB | 7 KB | 28 KB | 7 KB |
| Data RAM | 2 KB | 2 KB | 1 KB | 512 B | 2 KB | 512 B |
| Max CPU Speed | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| ADC | 12-bit ADCC | 12-bit ADCC | 12-bit ADCC | 12-bit ADCC | 10-bit ADC | 10-bit ADC |
| CWG | Yes | Yes | Yes | Yes | Yes | No |
| XLP Low Power | Yes (nA sleep) | Yes (nA sleep) | Yes (nA sleep) | Yes (nA sleep) | Yes (nA sleep) | Yes (nA sleep) |
| Operating Voltage | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V |
| Unit Price (1pc, USD) | 2.85 | 2.85 | 2.55 | 2.30 | 2.70 | 1.95 |
Bảo phân biệt quan trọng
- Largest flash in PIC16F184xx UQFN-20 family (vsPIC16F18444T-I/GZ)
- Newer 12-bit ADCC vs older 10-bit ADC (vsPIC16F15344T-I/GZ)
- On-chip CWG for power-switching waveforms (vsPIC16F15344T-I/GZ)
- Functional Safety (FuSa) documentation (vsPIC16F18445T-I/GZ)
Ghi chú thiết kế
Place a 100 nF decoupling capacitor as close as possible to the VDD pin (pin 18) and a 10 uF bulk capacitor at the board's power entry. For XLP nanoamp sleep operation, ensure no high-impedance floating pins leak current - either set unused pins to outputs or enable the internal weak pull-ups via WPUA/WPUB registers.
The UQFN-20 (4x4 mm) package requires a small thermal pad that should be soldered to a grounded copper pour of at least 0.5 cm^2 to improve thermal dissipation and mechanical reliability. Keep the ICSPDAT (RB7) and ICSPCLK (RB6) traces short and away from switching signals to ensure reliable in-circuit programming.
Do not confuse the UQFN-20 (GZ) package with the SOIC-20 or TSSOP-20 packages - the pin order differs. When migrating code from PIC16F18346 to PIC16F18446, note the new 12-bit ADCC registers (ADCON0/ADCON1/ADCON2/ADCON3) replace the older 10-bit ADC register layout. Always rebuild the project against the latest MPLAB X device packs.
The internal 32 MHz oscillator requires the OSCTUNE register to be calibrated for temperature-stable UART baud rates. For EUSART communication above 115200 baud, switch to a hardware crystal via the RA6/RA7 pins or use the PLL with HFINTOSC. Enable read-modify-write protection on PORT registers to avoid race conditions in ISR-driven GPIO updates.
Thông tin tuân thủ
RoHS and REACH compliant per Microchip product page. Standard variant is not AEC-Q100 qualified; choose PIC16F18446T-I/GZVAO (VAO suffix) for automotive-grade designs. Lead-free and halogen-free per Microchip environmental certification.
