PIC18F14Q40-I/REB - 8-Bit MCU, 16KB Flash, 64MHz | Microchip
MPN: PIC18F14Q40-I/REB ✓ Hoạt độngPIC18F14Q40-I/REB Tóm tắt
An 8-bit microcontroller (MCU) is a compact, single-chip processor that integrates a CPU, program memory (Flash), data memory (RAM), non-volatile storage (EEPROM), and a configurable set of analog and digital peripherals. PIC18 MCUs sit in the broader hierarchy of microcontrollers -> microprocessors -> semiconductors -> integrated circuits, and are widely used where deterministic interrupt response, low power, and rich analog integration are valued over raw compute throughput.
Key features include the 12-bit ADC2 engine with automated averaging, filtering, threshold detection, and sleep-mode operation, which offloads the CPU from measurement loops. Two 8-bit DACs provide reference voltages or waveform generation without external components. The 16-bit PWM with complementary outputs (with dead-band control) simplifies digital power, lighting, and motor control. Direct Memory Access (DMA) and a system bus arbiter allow autonomous data movement between peripherals and memory.
Typical applications include real-time control in compact form factors, sensor signal conditioning with on-chip ADC2, LED lighting and smart dimming (16-bit PWM), automotive and LIN-bus nodes, and IoT edge devices powered from cells or energy harvesters. A 20-VQFN (3x3) footprint makes the part attractive for space-constrained PCB layouts such as wearables and disposable medical patches.
When designing with the PIC18F14Q40-I/REB, place decoupling capacitors (100 nF plus 1-10 uF bulk) within 5 mm of the VDD pins and connect the exposed pad to a low-impedance ground pour for thermal dissipation. Configure unused I/O as outputs low to minimize current draw, and use the XLP sleep modes (nanoWatt) to extend battery life in duty-cycled sensor applications. MPLAB X IDE with XC8 compiler is the recommended toolchain.
This page consolidates distributor pricing, drop-in same-package alternatives, and engineering design guidance not found in the manufacturer datasheet alone, helping procurement and design engineers evaluate the PIC18F14Q40-I/REB against the rest of the PIC18-Q40 family in a single view.
Bộ thay thế dễ dàng lắp đặt cho PIC18F14Q40-I/REB — 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 PIC18F14Q40-I/REB (cùng hình factor và footprint) — khác nhau ở ADC, DAC, Package, Core Architecture, PWM.
PIC18F14Q40-I/SS
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
PIC18F14Q40T-I/REB
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
PIC18F14Q40-E/REB
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC18F04Q40-I/ST
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC18F05Q41T-I/ST
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC18F14Q40-I/REB Tỷ lệ tối đa & tính chất điện
| Core | PIC18 (8-bit RISC) |
| Architecture | Harvard, modified RISC |
| Program Memory (Flash) | 16 KB (16K x 8) |
| Data RAM | 1 KB |
| EEPROM | 512 bytes |
| Maximum CPU Frequency | 64 MHz |
| Operating Voltage | 1.8 V to 5.5 V |
| ADC | 12-bit ADC2 with Computation |
| DAC | 2 x 8-bit |
| PWM | 16-bit with dual independent outputs |
| Digital I/O Pins | 18 |
| Communication Interfaces | UART (LIN/DMX/DALI), SPI, I2C |
| DMA | Yes |
| Low-Power Technology | XLP (nanoWatt) |
| Nhiệt độ hoạt động | -40 C to +85 C (Industrial) |
| Hộp | 20-VQFN (3x3 mm) with exposed pad |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant |
Cấu hình chân PIC18F14Q40-I/REB
| Chân 1 | RA0/ICDDAT — Analog input AN0 / programming data |
| Chân 2 | RA1/ICSCLK — Analog input AN1 / programming clock |
| Chân 3 | RA2 — Analog input AN2 / DAC1 output |
| Chân 4 | RA3 — Analog input AN3 / DAC2 output |
| Chân 5 | RA4 — Digital I/O with weak pull-up |
| Chân 6 | RA5 — Digital I/O |
| Chân 7 | VDD — Power supply (1.8V-5.5V) |
| Chân 8 | VSS — Ground |
| Chân 9 | RB4 — Digital I/O, PWM output |
| Chân 10 | RB5 — Digital I/O, PWM output |
| Chân 11 | RB6/ICSPCLK — Digital I/O / ICSP clock |
| Chân 12 | RB7/ICSPDAT — Digital I/O / ICSP data |
| Chân 13 | RC0 — Digital I/O / analog input AN4 |
| Chân 14 | RC1 — Digital I/O / analog input AN5 |
| Chân 15 | RC2 — Digital I/O / analog input AN6 |
| Chân 16 | RC3 — Digital I/O / analog input AN7 |
| Chân 17 | RC4 — Digital I/O / SDA |
| Chân 18 | RC5 — Digital I/O / SCL |
| Chân 19 | RC6 — Digital I/O / TX |
| Chân 20 | RC7 — Digital I/O / RX |
Ứng dụng tiêu biểu
PIC18F14Q40-I/REB phù hợp cho 6 Áp dụngs: IoT Sensor Edge Node, Automotive LIN Bus Node, LED Lighting & Smart Dimming, Industrial Sensor Signal Conditioning, Compact Medical Wearable Patches, Consumer Appliance UI & Motor Sub-Node.
IoT Sensor Edge Node
The PIC18F14Q40-I/REB's 12-bit ADC2 with Computation engine and XLP nanoWatt technology make it ideal for battery-powered IoT sensor hubs at the network edge. ADC2 runs automated averaging, threshold detect, and sleep-mode conversions without waking the CPU, so a temperature or battery monitor can sample once per second while consuming single-digit uA average. The 16 KB Flash holds a state-machine plus secure bootloader, while 1 KB RAM handles small protocol buffers over UART/SPI/I2C. At 1.8-5.5 V supply, the same board works from a CR2032 cell or a 5 V industrial rail. The 3x3 mm VQFN footprint fits inside wearables, disposable patches, and energy-harvested wireless sensors, making the REB package a strong fit when PCB area is critical.
Được đề xuất
Automotive LIN Bus Node
The PIC18F14Q40-I/REB family includes hardware LIN support in its UART peripheral, providing automatic handling of break/sync fields and checksum generation per LIN 1.3/2.0. The 64 MHz CPU and 16-bit PWM (dual outputs with dead-band) suit automotive body electronics such as seat controllers, mirror modules, and ambient lighting, where 18 I/O pins cover switch scan + LED drive + motor half-bridge control. The 1.8-5.5 V operating range tolerates 12 V automotive rail drops during cranking via an external LDO. Compared with 32-bit Cortex-M alternatives, the PIC18's deterministic interrupt latency simplifies ASIL-related timing analysis. For designs that must reach +125 C, choose the PIC18F14Q40-E/REB variant.
Được đề xuất
LED Lighting & Smart Dimming
The PIC18F14Q40-I/REB's 16-bit PWM with dual independent outputs and configurable dead-band enable precision LED dimming up to 16-bit resolution at frequencies high enough to avoid flicker (above 1 kHz). Two integrated 8-bit DACs generate reference voltages or analog control outputs for tunable-white or RGB controllers. DMA moves PWM duty updates from RAM while the CPU runs the lighting protocol stack (DMX-512, DALI, or wireless bridge), freeing cycles for user-experience features. The compact 20-VQFN 3x3 mm footprint fits inside MR16 bulbs and down-light drivers; XLP sleep below 100 nA reduces standby power to meet Energy Star and Ecodesign limits for connected luminaires.
Được đề xuất
Industrial Sensor Signal Conditioning
Industrial sensor-conditioning designs benefit from the PIC18F14Q40-I/REB's 12-bit ADC2 with up to 200 ksps sampling, integrated differential measurement, and on-chip computation engine for moving averages and accumulator math. Combined with two 8-bit DACs for excitation sources, the MCU provides a fully integrated analog front-end for thermocouple, strain-gauge, or process-current (4-20 mA) sensor boards. The 1.8-5.5 V supply permits loop-powered 4-20 mA transmitter operation. Hardware SPI/I2C/UART accelerate connectivity to HMI displays and field-bus gateways. The 3x3 mm QFN footprint and 85 C industrial rating suit densely populated DIN-rail analog modules.
Được đề xuất
Compact Medical Wearable Patches
Medical adhesive patches and continuous-glucose-monitor (CGM) form factors demand an MCU under 3x3 mm that can run on a coin cell for two weeks. The PIC18F14Q40-I/REB delivers: XLP deep-sleep at sub-100 nA, 1.8 V minimum supply compatible with primary Li-MnO2 chemistries, and an integrated 12-bit ADC2 that performs threshold detection without CPU intervention. The two 8-bit DACs drive low-side current loops for bio-sensor stimulation, while DMA copies ADC samples into RAM during the rare active phase to maximize battery life. The 16-bit PWM can also drive an acoustic or haptic alarm at the end of life. Medical designs must validate IEC 60601-1/EMI per the OEM's risk file.
Được đề xuất
Consumer Appliance UI & Motor Sub-Node
For consumer white goods and HVAC indoor units that need a small UI/motor sub-node, the PIC18F14Q40-I/REB supplies 18 I/O to drive a segment LCD booster, capacitive-touch I/O extensions, and a low-power BLDC or stepper motor via the 16-bit PWM. Its 64 MHz performance handles user-interface state machines and motor commutation tables simultaneously, while DMA offloads repetitive timer-driven housekeeping. UART-based protocols (DMX, DALI, Modbus RTU on RS-485) are supported natively for appliance-network integration. The -40 C to +85 C industrial rating supports kitchen and laundry environments; the small 20-VQFN 3x3 mm package fits main-control board subsections.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18F14Q40-I/REB — 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 | PIC18F14Q40-I/SS | PIC18F14Q40T-I/REB | PIC18F14Q40-E/REB |
|---|---|---|---|---|
| Package | 20-VQFN (3x3 mm) with exposed pad | 20-SSOP | 20-VQFN (3x3) - same | 20-VQFN (3x3) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash / RAM / EEPROM | 16 KB / 1 KB / 512 B | 16 KB / 1 KB / 512 B (same) | 16 KB / 1 KB / 512 B (same) | 16 KB / 1 KB / 512 B (same) |
| Operating Temperature | -40 C to +85 C (Industrial) | -40 C to +85 C | -40 C to +85 C | -40 C to +125 C (Extended) |
| Max CPU Frequency | 64 MHz | 64 MHz | 64 MHz | 64 MHz |
| 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 |
| Automotive / AEC-Q100 | No (industrial grade) | No | No | No (extended industrial only) |
| DMA Controller | Yes | Yes | Yes | Yes |
Bảo phân biệt quan trọng
- Smallest PIC18 Q40 package footprint with full Q40 feature set (vsPIC18F14Q40-I/SS)
- Extended temperature option on the same Q40 die (vsPIC18F14Q40-I/REB (industrial))
- Tape-and-reel packaging code for production assembly (vsPIC18F14Q40-I/REB)
Ghi chú thiết kế
Place a 100 nF decoupling capacitor within 5 mm of each VDD pin (pin 7) and a single 1-10 uF bulk capacitor at the board level. The exposed thermal pad (pin 21) is electrically ground and must be soldered to a low-impedance ground pour with at least 6-9 thermal vias to the inner/bottom ground plane. A broken or missing ground pad causes roughly 2x junction-to-ambient thermal resistance, compromising reliability at >50 mW dissipation. For sensitive analog sampling, route analog ground and digital ground as separate polygons joined at one point beneath the IC.
Estimated: At VDD=3.3 V, CPU active @ 64 MHz = approx 8 mA per Microchip datasheet curves; idle = 1.4 mA. Deep-sleep XLP with ADC2 disabled falls below 1 uA. If your application averages >100 uA, audit digital I/O configurations - any input left floating >100 uA leakage can multiply by 18 I/O pins. Use internal weak pull-ups on unused pins and configure them as outputs-low to minimize quiescent current. Also note that 16-bit PWM frequency (F_PWM) = F_OSC / (2 * PTMR * (PR2+1)) - confirm PTMR prescaler and PR2 setting produce the target >1 kHz PWM frequency for LED dimming.
The 12-bit ADC2 with Computation achieves roughly 12 ENOB at 100 ksps when source impedance is below 1 kohm. Sensors with >10 kohm source impedance need an op-amp buffer (e.g., MCP6001) to avoid ADC charge-sharing errors. Use the post-adc Computation engine (oversampling mode) to gain an extra 2 effective bits - average 16 samples in firmware/ADC2 and read a 14-bit result for thermocouple and bridge-type sensors without external noise filtering.
Thông tin tuân thủ
RoHS and lead-free compliant per Microchip product page. Standard PIC18F14Q40-I/REB is industrial grade (-40 to +85 C) - not AEC-Q100; choose AEC-Q100-graded PIC18 variants if automotive qualification is required.
