PIC24FJ256GA704-I/PT - 16-bit MCU, 256KB Flash, 44-TQFP | Microchip
料号： PIC24FJ256GA704-I/PT ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $4.1 | $4.10 |
| 10 | $3.78 | $37.80 |
| 100 | $3.45 | $345.00 |
| 500 | $3.06 | $1,530.00 |
| 1,000 | $2.85 | $2,850.00 |
PIC24FJ256GA704-I/PT 概述
A 16-bit microcontroller is an embedded processor that balances computational throughput with low power consumption for applications that exceed 8-bit MCU capability but do not require 32-bit performance. PIC24F MCUs sit in the taxonomy as 16-bit MCU -> general-purpose microcontroller -> embedded processor -> semiconductor, optimized for low-power IoT, portable medical, and industrial control designs.
Key features include 256KB (85.5K x 24 instruction words) Flash with ECC, 16KB SRAM, hardware DMA controller, three analog comparators, a Charge Time Measurement Unit (CTMU) for capacitive touch sensing, and Microchip's eXtreme Low Power technology with multiple sleep modes. The device supports multiple serial interfaces including I2C, SPI, and UART for flexible peripheral connectivity.
The architecture combines a modified Harvard CPU core with single-cycle multiply and hardware divide, allowing efficient C-code execution. Integrated peripherals include a 12-bit ADC, configurable logic cells, and crypto-capable secure boot options within the GA family, all aimed at reducing external component count and BOM cost.
Typical applications include low-power IoT edge nodes, portable medical devices, industrial sensor interfaces with capacitive touch, and battery-powered consumer electronics. The wide peripheral mix also makes it suitable for data loggers and human-machine interface (HMI) panels.
Designers should pay attention to the 2.0V-3.6V VDD range required by the PIC24FJ GA family and ensure decoupling capacitance is placed within 5 mm of each power pin per Microchip reference designs.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found on the Microchip datasheet alone.
直接替换替代料： PIC24FJ256GA704-I/PT ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： PIC24FJ256GA704-I/PT （相同外形与封装尺寸） ——差异在于 Package, Operating Temperature, Core Architecture, ADC, Program Memory (Flash).
快速对比工具——选择替代料号进行并排对比：
PIC24FJ128GA704-I/PT
✅ 直接替换📋 参考替代料（不在目录中）
PIC24FJ128GA705-I/PT
✅ 直接替换✓ 有现货
$2.83 / 个
查看数据手册 →PIC24FJ256GA406-I/MR
✅ 直接替换✓ 有现货
$3.79 / 个
查看数据手册 →PIC24FJ128GA610-I/PT
✅ 直接替换✓ 有现货
$4.85 / 个
查看数据手册 →PIC24FJ256DA106-I/PT
✅ 直接替换✓ 有现货
$5.46 / 个
查看数据手册 →PIC24FJ128GB410-I/PT
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$3.15 / 个
查看数据手册 →PIC24FJ256GA704-I/PT 最大额定值与电气特性
| Core Architecture | PIC24F 16-bit |
| Program Memory (Flash) | 256 KB (85.5K x 24) with ECC |
| Data Memory (SRAM) | 16 KB |
| Maximum CPU Speed | 32 MHz |
| Operating Voltage (VDD) | 2.0 V to 3.6 V |
| ADC | 12-bit, up to 200 ksps, up to 14 analog inputs |
| Comparators | 3 |
| CTMU (Charge Time Measurement Unit) | Yes (for capacitive touch) |
| DMA | Yes (hardware DMA controller) |
| eXtreme Low Power (XLP) | Yes |
| 封装 | 44-TQFP (10x10 mm), /PT suffix |
| 引脚数量 | 44 |
| 安装类型 | Surface Mount |
| 工作温度 | -40C to +85C (industrial grade) |
| RoHS 状态 | Compliant |
PIC24FJ256GA704-I/PT 引脚配置
| 引脚 1 | RP15/PMPD/PMCS1/RB15 — Remappable peripheral / PMP data / Secondary chip select |
| 引脚 2 | RP14/PMPRD/RB14 — Remappable peripheral / PMP read strobe |
| 引脚 3 | VSS — Ground reference |
| 引脚 4 | VDD — Positive supply (2.0V - 3.6V) |
| 引脚 5 | RP13/PMPA0/AN13/RB13 — Remappable peripheral / PMP address / ADC input 13 |
| 引脚 6 | RP12/PMPA1/AN12/RB12 — Remappable peripheral / PMP address / ADC input 12 |
| 引脚 7 | RP11/PMPA2/AN11/RB11 — Remappable peripheral / PMP address / ADC input 11 |
| 引脚 8 | RP10/PMPA3/AN10/RB10 — Remappable peripheral / PMP address / ADC input 10 |
| 引脚 9 | RP9/PMPA4/AN9/RB9 — Remappable peripheral / PMP address / ADC input 9 |
| 引脚 10 | RP8/PMPA5/AN8/RB8 — Remappable peripheral / PMP address / ADC input 8 |
| 引脚 11 | RP7/PMPA6/AN7/RB7 — Remappable peripheral / PMP address / ADC input 7 |
| 引脚 12 | RP6/PMPA7/AN6/RB6 — Remappable peripheral / PMP address / ADC input 6 |
| 引脚 13 | RP5/AN5/CMP1D/RB5 — Remappable peripheral / ADC input / Comparator output |
| 引脚 14 | RP4/AN4/CMP2D/RB4 — Remappable peripheral / ADC input / Comparator output |
| 引脚 15 | RP3/AN3/CMP3D/RB3 — Remappable peripheral / ADC input / Comparator output |
| 引脚 16 | RP2/AN2/CMP1+/RB2 — Remappable peripheral / ADC input / Comparator input |
| 引脚 17 | RP1/AN1/CMP1-/RB1 — Remappable peripheral / ADC input / Comparator input |
| 引脚 18 | RP0/AN0/RB0 — Remappable peripheral / ADC input 0 |
| 引脚 19 | VSS — Ground reference |
| 引脚 20 | VDD — Positive supply |
| 引脚 21 | RA15/OSC2/CLKO/RC15 — General I/O / Crystal oscillator output |
| 引脚 22 | RA14/OSC1/CLKI/RC14 — General I/O / Crystal oscillator input |
| 引脚 23 | RA9/TDO/RP22/PMPD2 — JTAG TDO / Remappable peripheral |
| 引脚 24 | RA8/TCK/RP21/PMPD1 — JTAG TCK / Remappable peripheral |
| 引脚 25 | RA7/TDI/RP20/PMPD0 — JTAG TDI / Remappable peripheral |
| 引脚 26 | RA6/TMS/RP19/PMPWR — JTAG TMS / PMP write strobe |
| 引脚 27 | RA5/RP18/PMPBE — Remappable peripheral / PMP byte enable |
| 引脚 28 | RA4/RP17/PMPALE — Remappable peripheral / PMP address latch enable |
| 引脚 29 | RA3/RP16/PMPCS2 — Remappable peripheral / PMP chip select |
| 引脚 30 | RA2/RP13/SCL2 — Remappable peripheral / I2C clock |
| 引脚 31 | RA1/RP12/SDA2 — Remappable peripheral / I2C data |
| 引脚 32 | RA0/RP11 — Remappable peripheral |
| 引脚 33 | RC13/SOSC1/RP27 — Secondary oscillator / Remappable peripheral |
| 引脚 34 | RC14/SOSC2/RP26 — Secondary oscillator / Remappable peripheral |
| 引脚 35 | VSS — Ground reference |
| 引脚 36 | VDD — Positive supply |
| 引脚 37 | RC1/RP9 — Remappable peripheral |
| 引脚 38 | RC2/RP10 — Remappable peripheral |
| 引脚 39 | RC3/RP1/U1TX — UART1 transmit |
| 引脚 40 | RC4/RP2/U1RX — UART1 receive |
| 引脚 41 | RA10/RP3/U2TX — UART2 transmit |
| 引脚 42 | RA11/RP4/U2RX — UART2 receive |
| 引脚 43 | MCLR — Master clear reset (active-low) |
| 引脚 44 | AVSS — Analog ground reference |
典型应用
PIC24FJ256GA704-I/PT 适用于 6 应用s: Low-Power IoT Edge Sensor Node, Portable Medical Monitoring Device, Industrial Control with Capacitive Touch HMI, Battery-Powered Data Logger, Consumer Wearable with Touch Interface, Smart Home Sensor Hub.
Low-Power IoT Edge Sensor Node
The PIC24FJ256GA704-I/PT suits battery-powered IoT sensor hubs because of its eXtreme Low Power technology with deep-sleep currents under 1 uA and 256 KB Flash for over-the-air firmware staging. The 12-bit ADC at 200 ksps captures multi-channel sensor data while the hardware DMA offloads the core to keep wake events short. Its 44-TQFP footprint fits 25 mm square sensor PCBs. Compared with 32-bit Cortex-M0+ alternatives, the PIC24FJ256GA704 offers lower sleep current at similar integration, extending coin-cell life to multi-year runtimes in typical 30-second wake/sleep duty cycles.
推荐
Portable Medical Monitoring Device
For handheld medical monitors like pulse oximeters and single-lead ECG patches, the PIC24FJ256GA704-I/PT offers 256 KB ECC Flash for reliable code storage and 16 KB SRAM sufficient for signal buffering. The 12-bit ADC captures biosensor waveforms, while CTMU enables capacitive touch buttons without extra ICs. Operating from 2.0V to 3.6V supports direct Li-ion battery connection. Per Microchip documentation, the integrated DMA reduces CPU load during high-rate sampling, preserving headroom for filtering algorithms in real-time patient-monitoring firmware.
推荐
Industrial Control with Capacitive Touch HMI
The PIC24FJ256GA704-I/PT integrates three comparators and CTMU, making it ideal for industrial control panels with capacitive touch keys and sliders that must reject 50/60 Hz mains noise. Its 32 MHz core runs PID control loops in real time while the DMA pumps ADC samples into memory without CPU intervention. The 44-TQFP package provides ample I/O for relay drivers and isolated UART links. Microchip's eXtreme Low Power features suit solar-powered remote sensor installations where average current budgets stay under 50 uA.
推荐
Battery-Powered Data Logger
With 256 KB of Flash and 16 KB of SRAM, the PIC24FJ256GA704-I/PT can buffer tens of thousands of 12-bit ADC samples before writing to an external SPI flash or microSD card. The 32 MHz core supports real-time stamping using RTCC, while deep-sleep modes extend multi-year deployments on AA cells. The 2.0V-3.6V VDD range matches two-alkaline-cell and single Li-ion chemistries without external regulation. DMA offloads continuous ADC capture during long acquisition windows, freeing the CPU for compression and storage management.
推荐
Consumer Wearable with Touch Interface
Wearable fitness bands benefit from the PIC24FJ256GA704-I/PT's CTMU for capacitive touch buttons and slider control, plus the 12-bit ADC for heart-rate and motion sensor fusion. eXtreme Low Power modes extend battery life past a week on a 100 mAh cell. The compact 44-TQFP (10x10 mm) package leaves room for sensors and a small OLED on the wristband PCB. Compared to 8-bit MCUs, the 16-bit PIC24FJ core executes DSP-style filtering on accelerometer data at lower clock speed, conserving power.
推荐
Smart Home Sensor Hub
The PIC24FJ256GA704-I/PT's mix of UART, SPI, and I2C peripherals makes it a strong hub MCU for aggregating multiple sensors (temperature, humidity, occupancy) before forwarding via Wi-Fi or sub-GHz radio. 256 KB Flash accommodates Zigbee or proprietary stacks, while 16 KB RAM buffers sensor frames. XLP sleep modes below 1 uA allow mains-powered or battery-assisted smart switches. Per Microchip reference designs, DMA-driven UART reception simplifies gateway code in HomeKit and Matter-style deployments.
推荐
推荐产品汇总
工程参考数据： PIC24FJ256GA704-I/PT ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | PIC24FJ128GA704-I/PT | PIC24FJ128GA705-I/PT | PIC24FJ256DA106-I/PT | PIC24FJ128GA610-I/PT | PIC24FJ256GA406-I/MR |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-TQFP (10x10 mm) | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same | 64-QFN - different |
| Core | PIC24F 16-bit | PIC24F 16-bit | PIC24F 16-bit | PIC24F 16-bit | PIC24F 16-bit | PIC24F 16-bit |
| Flash | 256 KB | 128 KB (-50%) | 128 KB (-50%) | 256 KB (same) | 128 KB (-50%) | 256 KB (same) |
| RAM | 16 KB | 16 KB | 16 KB | 16 KB | 32 KB | 16 KB |
| Max CPU Speed | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| ADC | 12-bit, 200 ksps, 14 ch | 12-bit, 200 ksps, 14 ch | 12-bit, 200 ksps, 14 ch | 12-bit, 200 ksps | 12-bit, 200 ksps | 12-bit, 200 ksps |
| CTMU (Touch) | Yes | Yes | Yes | Yes | Yes | Yes |
| USB | No | No | No | No | No | No |
关键差异点
- Drop-in same-package memory halving with PIC24FJ128GA704-I/PT （对比 PIC24FJ128GA704-I/PT)
- Same Flash, double RAM in PIC24FJ128GA610-I/PT （对比 PIC24FJ128GA610-I/PT)
- Integrated LCD driver with PIC24FJ256DA106-I/PT （对比 PIC24FJ256DA106-I/PT)
设计说明
Place a 10 uF bulk capacitor and a 100 nF decoupling capacitor within 5 mm of each VDD/VSS pin pair of the PIC24FJ256GA704-I/PT. The on-chip voltage regulator requires a low-ESR capacitor on the VCAP pin (typically 1 uF) to maintain 1.8V core stability. Without proper decoupling, ADC readings may show 2-3 LSB noise due to switching transients coupling into the analog supply.
Route the analog signals (AN0-AN13) away from high-speed digital lines like PWM outputs and the secondary oscillator. Use a ground pour under the analog traces connected to AVSS. For CTMU-based capacitive touch, place the sensing electrodes on the opposite side of the PCB from any ground plane with at least 100 mil clearance to reduce parasitic capacitance and improve touch sensitivity.
Do not exceed the absolute maximum VDD of 3.6V on the PIC24FJ256GA704-I/PT; connecting 5V signals directly will damage the part. Use a level translator (e.g., TXS0108E) for any 5V peripheral interface. Also, ensure the MCLR pin has a proper pull-up (10 kOhm) and 100 nF capacitor for reset noise immunity. Programming failures often trace to MCLR ringing on long cables during ICSP.
合规信息
RoHS and REACH compliant per Microchip product page and DigiKey listing. Not AEC-Q100 qualified; the part is industrial-grade -40C to +85C.
