PIC16F1705-I/ST - 8-Bit 32MHz MCU 14KB Flash XLP | Microchip
MPN: PIC16F1705-I/ST ✓ Hoạt độngPIC16F1705-I/ST Tóm tắt
An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data path, typically used for embedded control in cost- and power-sensitive applications. The PIC16F1705 sits within the broader hierarchy: 8-bit MCU -> microcontroller -> embedded processor -> semiconductor device. Compared with 32-bit MCUs, 8-bit parts such as the PIC16F1705 consume less power, retain simpler toolchains, and remain preferred for simple sensor, motor, and human-interface tasks where deterministic behavior at low MHz is more valuable than raw compute throughput.
Key differentiating features include two on-chip operational amplifiers (a rare integration for an 8-bit MCU), Core Independent Peripherals (CLC, COG, Zero-Cross Detect) that offload logic from the CPU, Peripheral Pin Select (PPS) for flexible signal routing, and XLP technology for nanoWatt sleep currents. The device supports 10-bit ADC with computation, 8-bit DAC, PWM modules, EUSART, MSSP (I2C/SPI), and up to 12 I/O pins in this 14-pin TSSOP package. The combination of analog integration and zero-cross detection is purpose-built for sensor conditioning, lighting control, and small appliance designs.
Architecture-wise, the PIC16F1705 uses an enhanced mid-range PIC16 core with a hardware multiplier, a 16-level hardware stack, and a modified Harvard bus that separates instruction and data fetches. Internal oscillator calibration and on-chip debug support via ICD reduce external component count and accelerate time-to-prototype. According to Microchip datasheet 40001729C, the device operates from 1.8V to 5.5V, allowing direct connection to single-cell Li-ion, 2x AA, or 5V rails commonly found in consumer and industrial products.
Typical applications include AC zero-cross switching control (TRIAC/SSR drive), LED lighting ballasts, small motor control loops via COG, sensor signal conditioning using the on-chip op amps, and battery-powered IoT end-nodes where XLP nanoWatt sleep currents extend coin-cell life. The integrated 10-bit ADC with computation and dedicated op amps also suit cost-sensitive instrumentation and HVAC fan-control designs.
When selecting this part, designers should confirm the 14-pin TSSOP footprint matches the available PCB area and verify the 1KB RAM is sufficient for the application state machine. For designs needing more I/O, peripherals, or memory, the family sibling PIC16F1709 (20-pin) or PIC16F1713/1716 are drop-in alternatives within the same software ecosystem and toolchain (MPLAB X IDE, XC8 compiler).
This page aggregates distributor pricing, parameter-level comparison versus same-package PIC16F family siblings, drop-in alternatives, and practical design guidance not found in a single manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho PIC16F1705-I/ST — 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 PIC16F1705-I/ST (cùng hình factor và footprint) — khác nhau ở Core Architecture, ADC, Package, DAC, Comparators.
PIC16F1704-I/ST
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16LF1705-I/ST
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F1713-I/ST
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
PIC16F1703-I/ST
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC16F1705-I/ST Tỷ lệ tối đa & tính chất điện
| Core Architecture | 8-bit PIC16 Enhanced Mid-Range |
| Program Memory (Flash) | 14 KB (8K x 14 words) |
| RAM | 1 KB |
| Maximum CPU Clock | 32 MHz |
| Operating Voltage Range | 1.8 V to 5.5 V |
| Number of I/O Pins | 12 |
| ADC | 10-bit, up to 8 channels |
| DAC | 8-bit |
| On-Chip Operational Amplifiers | 2 |
| Comparators | 2 |
| Communication Peripherals | 1x EUSART, 1x MSSP (I2C/SPI) |
| Core Independent Peripherals | CLC, COG (Configurable Logic/Counter), Zero-Cross Detect, PPS |
| Nhiệt độ hoạt động | -40 C to +85 C (industrial grade) |
| Hộp | 14-TSSOP (4.4 mm, pitch 0.65 mm) |
| Kiểu lắp đặt | Surface Mount |
Cấu hình chân PIC16F1705-I/ST
| Chân 1 | VDD — Positive supply voltage (1.8V to 5.5V) |
| Chân 2 | RA5 — Bidirectional I/O pin; analog/digital peripheral functions |
| Chân 3 | RA4 — Bidirectional I/O pin |
| Chân 4 | RA3/MCLR/VPP — Master Clear (reset) input or digital I/O |
| Chân 5 | RA2 — Bidirectional I/O; analog input |
| Chân 6 | RA1/ICSPCLK — I/O; ICSP clock |
| Chân 7 | RA0/ICSPDAT — I/O; ICSP data |
| Chân 8 | VSS — Ground reference |
| Chân 9 | RB7 — Bidirectional I/O |
| Chân 10 | RB6 — Bidirectional I/O |
| Chân 11 | RB5 — Bidirectional I/O; analog input |
| Chân 12 | RB4 — Bidirectional I/O |
| Chân 13 | RB3 — Bidirectional I/O |
| Chân 14 | RB2 — Bidirectional I/O; analog input |
Ứng dụng tiêu biểu
PIC16F1705-I/ST phù hợp cho 6 Áp dụngs: AC Zero-Cross Switching / TRIAC Control, LED Lighting Ballasts and Drivers, Battery-Powered IoT Sensor End-Nodes, Small Motor Control (BLDC / Stepper), Industrial Sensor Conditioning, HVAC Fan / Pump Speed Control.
AC Zero-Cross Switching / TRIAC Control
The PIC16F1705-I/ST's integrated Zero-Cross Detect peripheral simplifies optically-isolated TRIAC and SSR drive for AC loads. At 32 MHz instruction rate, the CPU can stay in Sleep between zero-cross events while the ZCD peripheral triggers interrupts, achieving sub-50us response. This fits dimmer controls, solid-state relay replacement, and AC switching for appliance control where minimizing EMI is critical, while the 1.8-5.5V supply allows direct operation from rectified mains via a capacitive dropper.
Được đề xuất
LED Lighting Ballasts and Drivers
The PIC16F1705-I/ST can drive constant-current LED ballasts by combining its on-chip op amp for current sensing, 10-bit ADC for closed-loop measurement, and PWM module for FET drive. XLP nanoWatt sleep currents allow battery-backed emergency-LED drivers to idle months before mains return. With 12 I/O available in the 14-TSSOP, designers can drive 2-3 dimmable LED channels from a single MCU plus external MOSFETs, while Peripheral Pin Select adapts the PWM to any available pin for layout flexibility.
Được đề xuất
Battery-Powered IoT Sensor End-Nodes
The PIC16F1705-I/ST's XLP technology delivers nanoamp Sleep currents, allowing coin-cell sensor end-nodes to operate for years. The on-chip 10-bit ADC reads temperature, humidity, or motion sensors directly; the integrated op amp amplifies low-output sensors like thermopiles or photo-diodes without external components. With EUSART and MSSP, the part can drive UART-based radios or SPI/ I2C sensors, while Core Independent Peripherals handle wake-up timing without CPU intervention.
Được đề xuất
Small Motor Control (BLDC / Stepper)
Using the Configurable Logic Cell (CLC) and Complementary Output Generator (COG), the PIC16F1705-I/ST generates complementary PWM with dead-band insertion for brushless DC motor commutation without CPU load. The 32 MHz instruction rate and 10-bit ADC sample back-EMF signals fast enough for sensorless trapezoidal commutation on small fans or pumps. Twelve I/O pins provide H-bridge gate drive (6 PWMs) plus UART/SPI for feedback and tuning.
Được đề xuất
Industrial Sensor Conditioning
The PIC16F1705-I/ST integrates two on-chip op amps that condition signals from bridge sensors (load cells, pressure sensors) and 4-20 mA loop receivers before the 10-bit ADC. Industrial -40°C to +85°C temperature grade supports factory-floor deployment. PPS routes ADC, comparator and PWM to any I/O, simplifying mixed-signal PCB layout, while the 14-TSSOP package supports hand-rework during prototype qualification.
Được đề xuất
HVAC Fan / Pump Speed Control
The PIC16F1705-I/ST regulates fan or pump RPM via a closed-loop feedback using Zero-Cross Detect for AC line reference, op amp for current sensing, and PWM for TRIAC phase control. The 8-bit DAC is ideal for generating 0-10V analog control signals emulating industrial control standards. EUSART provides Modbus RTU slave connectivity for building automation systems, while XLP sleep mode keeps standby power below 0.5W to meet eco-design regulations.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16F1705-I/ST — 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 | PIC16F1704-I/ST | PIC16LF1705-I/ST | PIC16F1713-I/ST | PIC16F1703-I/ST |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 14-TSSOP | 14-TSSOP - same | 14-TSSOP - same | 14-TSSOP - same | 14-TSSOP - same |
| Flash | 14 KB | 7 KB (-50%) | 14 KB (same) | 7 KB (-50%) | 7 KB (-50%) |
| Operating Voltage | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 3.6 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V |
| Max CPU Clock | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| On-chip Op Amps | 2 | 2 | 2 | 2 | 2 |
| Zero-Cross Detect | Yes | Yes | Yes | Yes | Yes |
| Industrial Temp Grade | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
Bảo phân biệt quan trọng
- Integrated dual on-chip op amps (vsPIC16F1704-I/ST)
- Core Independent Peripherals (CLC, COG, ZCD) (vsPIC16F1703-I/ST)
- 1KB RAM vs 512B RAM (vsPIC16F1704-I/ST)
Ghi chú thiết kế
The PIC16F1705-I/ST shares its PIC16F17xx register set with the PIC16F1709 but the 14-pin TSSOP variant exposes fewer peripherals. Code written for the 20-pin PIC16F1709 may reference pins RB6/RB7 that are present on the 14-pin package as well as additional RA functions - always recompile against the 14-pin pin map or peripheral availability will silently break. Source: Microchip datasheet 40001729C.
Place the 0.1 uF VDD decoupling capacitor within 3 mm of pin 1 (VDD) and a bulk capacitor within 10 mm. The TSSOP-14 thermal pad is not present, so no PCB thermal copper requirement exists; however, for ADC noise performance, dedicate a quiet analog ground island that joins the digital ground at a single point near pin 8 (VSS).
When using the on-chip op amps for high-impedance sensors, route the inverting/non-inverting traces as a differential pair with a ground guard to avoid switching noise coupling from PWM outputs. The 10-bit ADC input bandwidth (per datasheet 40001729C) limits usable analog signal frequencies to ~250 kHz; pre-filter signals above this to avoid aliasing.
Estimated: at 32 MHz, VDD=3.3V, active current is approximately 4 mA (typical); in Sleep with peripherals disabled, XLP mode drops below 100 nA. Coin-cell life calculations should use Microchip's nanoWatt calculator because Sleep current varies with WDT, BOR and RTCC enable states.
Thông tin tuân thủ
RoHS / REACH compliance status not provided in the verified web data; consult Microchip product page or contact Microchip directly for confirmation. Not AEC-Q100 qualified (industrial grade only).
