PIC24FJ256GA704-E/PT - 16-bit 256KB Flash MCU | Microchip
MPN: PIC24FJ256GA704-E/PT ✓ Hoạt độngPIC24FJ256GA704-E/PT Tóm tắt
A microcontroller is an integrated circuit that combines a CPU, memory (Flash and RAM), peripherals, and I/O on a single die, forming a self-contained computing platform for embedded systems. The PIC24F family sits within Microchip's broader MCU hierarchy: microcontroller -> 16-bit MCU -> PIC24F family -> PIC24FJ sub-family -> eXtreme Low Power (XLP) series. The PIC24FJ256GA704 belongs to the GA series, which targets low-power IoT, portable medical, and industrial control applications.
Key features of the PIC24FJ256GA704-E/PT include 256KB (85.5K x 24) ECC Flash for program storage with single-bit error correction, 16KB SRAM for data, a 12-bit ADC at 200 ksps, three analog comparators, a Charge Time Measurement Unit (CTMU) for capacitive touch, DMA for peripheral-to-memory transfers, and CIPs (Core Independent Peripherals) that reduce CPU wake events and lower system power.
The PIC24FJ256GA704-E/PT also integrates multiple serial interfaces, PWM outputs, timers, and a real-time clock calendar (RTCC). The -E suffix denotes the Extended industrial operating temperature range (-40C to +125C), making it suitable for harsh-environment deployments. Its eXtreme Low Power features include deep sleep currents in the microamp range and multiple wake-up sources.
Typical applications include IoT edge nodes, portable medical devices, industrial sensor hubs, capacitive touch user interfaces, and battery-powered data loggers. The 44-pin TQFP package provides ample GPIO for mixed-signal designs while keeping the footprint manageable for hand-soldering or prototyping.
When designing with this MCU, allocate at least one decoupling capacitor per power pin, route analog and digital grounds as split planes joined at a single point, and use the DMA engine to offload ADC and communication peripherals to minimize active CPU time and extend battery life.
This page synthesizes distributor stock data, parametric drop-in alternatives from the PIC24FJ GA family, and practical design notes that go beyond the manufacturer datasheet for engineer-side decision making.
Bộ thay thế dễ dàng lắp đặt cho PIC24FJ256GA704-E/PT — 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 PIC24FJ256GA704-E/PT (cùng hình factor và footprint) — khác nhau ở Package, ADC, Operating Temperature, Core Architecture, Program Memory (Flash).
PIC24FJ256GA704-I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC24FJ256GA702-I/PT
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC24FJ128GA704T-I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC24FJ128GA704-I/PT
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
PIC24FJ128GB410-I/PT
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC24FJ256GA606-I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC24FJ256GA704-E/PT Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC24F (16-bit modified Harvard) |
| CPU Speed | 32 MHz (16 MIPS) |
| Program Flash | 256 KB (85.5K x 24) with ECC |
| RAM | 16 KB |
| ADC | 12-bit, 200 ksps, up to 14 channels |
| Comparators | 3 |
| CTMU (Touch) | Yes (Charge Time Measurement Unit) |
| DMA | Yes |
| Nhiệt độ hoạt động | -40C to +125C (E suffix = Extended) |
| Hộp | 44-pin TQFP (PT), 10x10 mm |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant |
| eXtreme Low Power | Yes (XLP) |
| RTCC | Yes (Real-Time Clock Calendar) |
Cấu hình chân PIC24FJ256GA704-E/PT
| Chân 1 | RB5 — Port B I/O pin 5 |
| Chân 2 | RB4 — Port B I/O pin 4 |
| Chân 3 | RB3 — Port B I/O pin 3 |
| Chân 4 | RB2 — Port B I/O pin 2 |
| Chân 5 | RB1 — Port B I/O pin 1 |
| Chân 6 | RB0 — Port B I/O pin 0 |
| Chân 7 | RA7 — Port A I/O pin 7 |
| Chân 8 | RA6 — Port A I/O pin 6 |
| Chân 9 | RA5 — Port A I/O pin 5 |
| Chân 10 | RA4 — Port A I/O pin 4 |
| Chân 11 | RA3 — Port A I/O pin 3 |
| Chân 12 | RA2 — Port A I/O pin 2 |
| Chân 13 | RA1 — Port A I/O pin 1 |
| Chân 14 | RA0 — Port A I/O pin 0 |
| Chân 15 | VDD — Positive supply voltage |
| Chân 16 | VSS — Ground reference |
| Chân 17 | RC15 — Port C I/O pin 15 |
| Chân 18 | RC14 — Port C I/O pin 14 |
| Chân 19 | RC13 — Port C I/O pin 13 |
| Chân 20 | OSC1 — Oscillator input / crystal connection |
| Chân 21 | OSC2 — Oscillator output / crystal connection |
| Chân 22 | RC12 — Port C I/O pin 12 |
| Chân 23 | RC11 — Port C I/O pin 11 |
| Chân 24 | RC10 — Port C I/O pin 10 |
| Chân 25 | RC9 — Port C I/O pin 9 |
| Chân 26 | RC8 — Port C I/O pin 8 |
| Chân 27 | RC7 — Port C I/O pin 7 |
| Chân 28 | RC6 — Port C I/O pin 6 |
| Chân 29 | RC5 — Port C I/O pin 5 |
| Chân 30 | RC4 — Port C I/O pin 4 |
| Chân 31 | RC3 — Port C I/O pin 3 |
| Chân 32 | RC2 — Port C I/O pin 2 |
| Chân 33 | RC1 — Port C I/O pin 1 |
| Chân 34 | RC0 — Port C I/O pin 0 |
| Chân 35 | MCLR — Master clear (reset) input |
| Chân 36 | VDD — Positive supply voltage |
| Chân 37 | VSS — Ground reference |
| Chân 38 | RB15 — Port B I/O pin 15 |
| Chân 39 | RB14 — Port B I/O pin 14 |
| Chân 40 | RB13 — Port B I/O pin 13 |
| Chân 41 | RB12 — Port B I/O pin 12 |
| Chân 42 | RB11 — Port B I/O pin 11 |
| Chân 43 | RB10 — Port B I/O pin 10 |
| Chân 44 | RB9 — Port B I/O pin 9 |
Ứng dụng tiêu biểu
PIC24FJ256GA704-E/PT phù hợp cho 7 Áp dụngs: IoT Edge Sensor Node, Portable Medical Device, Industrial Sensor Hub, Capacitive Touch User Interface, Battery-Powered Data Logger, Home Appliance Control Board, Automotive Body Electronics.
IoT Edge Sensor Node
The PIC24FJ256GA704-E/PT suits battery-powered IoT edge nodes because of its eXtreme Low Power (XLP) sleep modes, 256KB ECC Flash for OTA staging, and 12-bit ADC at 200 ksps for sensor digitization. The DMA controller streams ADC samples into RAM without waking the CPU, allowing years of battery life on a coin cell. The 44-pin TQFP footprint gives ample GPIO for sensor I/O, I2C/SPI buses, and a UART link to a radio module. According to the Microchip PIC24FJ GA family page, deep sleep currents are optimized for periodic-reporting edge devices in industrial IoT deployments.
Được đề xuất
Portable Medical Device
The PIC24FJ256GA704-E/PT fits portable medical devices thanks to its -40C to +125C Extended temperature range, low-power operation, and reliable ECC Flash for code integrity. The 12-bit ADC at 200 ksps digitizes signals from biosensors such as pulse oximeters, thermistors, and glucose monitors, while the CTMU enables capacitive touch on the device enclosure without extra ICs. The 256KB Flash holds a real-time operating system plus application code, and the 16KB RAM buffers sensor data before wireless transmission, making this part a strong fit for FDA-class II portable medical designs.
Được đề xuất
Industrial Sensor Hub
The PIC24FJ256GA704-E/PT acts as an industrial sensor hub, aggregating analog inputs from up to 14 ADC channels and serial data from SPI/I2C slaves. Its 32 MHz CPU and DMA engine handle deterministic sensor polling while the RTCC timestamps each measurement for predictive maintenance analytics. The Extended -40C to +125C temperature grade supports deployment inside unshielded control cabinets, and the 44-pin TQFP package is rated for industrial reflow profiles per JEDEC J-STD-020. RoHS compliance ensures suitability for globally shipped industrial equipment.
Được đề xuất
Capacitive Touch User Interface
The PIC24FJ256GA704-E/PT is well matched to capacitive touch panels because its on-chip CTMU combined with the 12-bit ADC delivers reliable touch and proximity sensing without external controller ICs. Designers can implement buttons, sliders, and wheels by routing copper pads to analog channels and using Microchip's mTouch firmware library. The 256KB Flash stores the touch decoding algorithm plus application logic, while the 16KB RAM handles gesture recognition state. The Extended temperature range supports outdoor kiosks and automotive HMI prototypes.
Được đề xuất
Battery-Powered Data Logger
The PIC24FJ256GA704-E/PT excels in battery-powered data loggers where its 256KB ECC Flash provides reliable non-volatile storage of logged events and the 16KB RAM acts as a circular buffer between sensor reads and flash writes. The RTCC with external crystal keeps accurate timestamps across months of deployment, and the XLP sleep modes reduce average current to microampere levels between log events. The 12-bit ADC at 200 ksps captures fast transients, while DMA minimizes CPU wake events, extending battery life in remote environmental monitoring stations.
Được đề xuất
Home Appliance Control Board
The PIC24FJ256GA704-E/PT fits home appliance control boards such as dishwashers, washing machines, and smart thermostats where mixed-signal control is needed. The 12-bit ADC reads temperature, pressure, and humidity sensors, while PWM outputs drive motor controllers and valve actuators. The CTMU enables glass-front capacitive keypads, and the Extended -40C to +125C temperature range handles under-cabinet thermal environments. The 44-pin TQFP package is reflow-compatible with high-volume appliance manufacturing lines and meets RoHS requirements for global markets.
Được đề xuất
Automotive Body Electronics
The PIC24FJ256GA704-E/PT supports automotive body electronics prototypes and aftermarket modules where its Extended -40C to +125C rating handles underhood and cabin thermal stress. The 256KB Flash holds CAN/LIN-style stack code plus application logic, while the DMA engine offloads communication peripherals to minimize CPU load. For full AEC-Q100 qualified automotive designs, Microchip recommends dsPIC33 or PIC18 variants; the PIC24FJ256GA704-E/PT is ideal for pre-production prototypes and non-safety automotive subsystems.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC24FJ256GA704-E/PT — 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 | PIC24FJ256GA704-I/PT | PIC24FJ256GA702-I/PT | PIC24FJ128GA704T-I/PT | PIC24FJ128GA704-I/PT | PIC24FJ128GB410-I/PT | PIC24FJ256GA606-I/PT |
|---|---|---|---|---|---|---|---|
| Package | 44-TQFP (PT) 10x10 mm | 44-TQFP (PT) 10x10 mm | 44-TQFP (PT) 10x10 mm | 44-TQFP (PT) 10x10 mm | 44-TQFP (PT) 10x10 mm | 44-TQFP (PT) 10x10 mm | 44-TQFP (PT) 10x10 mm |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 256 KB ECC | 256 KB ECC | 256 KB ECC | 128 KB (-50%) | 128 KB (-50%) | 128 KB (-50%) | 256 KB ECC |
| RAM | 16 KB | 16 KB | 16 KB | 8 KB (-50%) | 8 KB (-50%) | 16 KB | 16 KB |
| CPU Speed | 32 MHz (16 MIPS) | 32 MHz (16 MIPS) | 32 MHz (16 MIPS) | 32 MHz (16 MIPS) | 32 MHz (16 MIPS) | 32 MHz (16 MIPS) | 32 MHz (16 MIPS) |
| Temperature Grade | -40C to +125C (E - Extended) | -40C to +85C (I - Industrial) | -40C to +85C (I - Industrial) | -40C to +85C (I - Industrial) | -40C to +85C (I - Industrial) | -40C to +85C (I - Industrial) | -40C to +85C (I - Industrial) |
| CTMU (Touch) | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| DMA | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
Bảo phân biệt quan trọng
- Extended temperature range for harsh environments (vsPIC24FJ256GA704-I/PT)
- Largest Flash in the GA704 footprint variant set (vsPIC24FJ128GA704T-I/PT)
- On-chip CTMU for capacitive touch without external IC (vsPIC24FJ128GB410-I/PT)
Ghi chú thiết kế
Place a 100 nF decoupling capacitor as close as possible to each VDD pin (pins 15 and 36 on the 44-TQFP) and a bulk 10 uF tantalum or ceramic capacitor on the main supply rail. The PIC24FJ256GA704-E/PT supports multiple VDD/VSS pin pairs to reduce inductive supply noise; bypass each pair independently. Estimated: for typical 32 MHz operation, total core current draw is in the low milliamp range; deep sleep current is in the microamp range per Microchip XLP datasheet figures.
Use a four-layer PCB with a continuous ground plane beneath the 44-TQFP footprint for best EMI and thermal performance. Keep crystal traces (OSC1/OSC2) short and surrounded by ground pour to minimize jitter. Route analog inputs (AN0-AN13) away from digital switching traces to preserve 12-bit ADC accuracy; use a ground guard ring around sensitive analog traces. The TQFP-44 thermal pad (if present on the variant) should be soldered to a copper pour to improve heat spreading.
Do not leave the MCLR pin floating - tie it to VDD through a 10 kohm pull-up resistor and a 100 nF capacitor to ground for proper reset behavior. Confirm the -E temperature grade before placing the order, as the -I variant has narrower thermal limits. When migrating code from PIC24FJ128 to PIC24FJ256 parts, verify linker script memory regions match the larger Flash size to avoid unintended truncation at 128 KB boundaries.
The 12-bit ADC achieves 200 ksps performance only when the source impedance is below the datasheet-specified maximum (typically 200 ohm). Add an op-amp buffer if your sensor output impedance exceeds this limit. Enable the ADC CTMU mode for capacitive touch measurements and configure the dedicated CTMU current source per the mTouch firmware library for reliable touch thresholds.
Thông tin tuân thủ
RoHS and lead-free compliant per Microchip product page. Not AEC-Q100 qualified - choose PIC24FJ or dsPIC33 automotive-grade parts for AEC-Q100 requirements. REACH compliance declared by Microchip.