PIC24FJ64GA702-I/SO - 16-bit MCU, 64KB Flash, 28-SOIC | Microchip
料号： PIC24FJ64GA702-I/SO ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $3.71 | $3.71 |
| 10 | $3.34 | $33.40 |
| 100 | $2.96 | $296.00 |
| 500 | $2.65 | $1,325.00 |
| 1,000 | $2.34 | $2,340.00 |
PIC24FJ64GA702-I/SO 概述
A 16-bit microcontroller (MCU) is a single-chip computer that integrates a 16-bit CPU core, program memory, data memory, and peripherals such as ADC, timers, and communication interfaces into one package. Within the broader taxonomy, an MCU belongs to the category of microcontrollers -> embedded processors -> semiconductor ICs. The 16-bit class sits between 8-bit MCUs (lower cost, simpler peripherals) and 32-bit MCUs (higher performance, more RAM) and is commonly used in mixed-signal, low-power, and human-interface designs where 8-bit performance is insufficient but 32-bit cost is unjustified.
The PIC24FJ64GA702 includes a 12-bit ADC at up to 200 ksps with up to 14 analog input channels (package-dependent), 3 analog comparators, a CTMU for capacitive-touch measurement, a 6-channel DMA controller for data movement without CPU intervention, and a hardware crypto engine for secure communications. It also integrates up to three UART/SPI/I2C peripherals and supports USB 2.0 Full-Speed device/host/OTG on selected family members.
Architecturally, the device uses a modified Harvard CPU with 16-bit instructions and a 24-bit instruction word, 17 x 17-bit single-cycle hardware multiplier, and a 32-bit-by-32-bit hardware divider. This enables deterministic interrupt response and efficient DSP-like arithmetic, while the DMA engine offloads high-throughput peripherals so the CPU remains in low-power sleep states longer.
Typical applications include industrial sensor nodes, low-power IoT edge devices, portable medical instrumentation, USB peripherals, capacitive-touch human-machine interfaces (HMIs), small graphic LCD displays, and battery-powered consumer products where the eXtreme Low Power idle current extends operating life.
When designing with this device, place the recommended 10 uF bulk plus 0.1 uF ceramic decoupling pair within 5 mm of VDD/AVDD pins and ensure the MCLR reset pin has the proper 10 kohm pull-up; failure to do so can cause intermittent programming or brown-out behavior at low temperature.
This page synthesizes distributor pricing, pin-compatible drop-in alternatives in the 28-SOIC footprint, and practical engineering design notes not found in the manufacturer datasheet.
直接替换替代料： PIC24FJ64GA702-I/SO ——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： PIC24FJ64GA702-I/SO （相同外形与封装尺寸） ——差异在于 Package, ADC, Operating Temperature, Core Architecture, MSL Level.
快速对比工具——选择替代料号进行并排对比：
PIC24FJ64GA702-E/SO
✅ 直接替换✓ 有现货
$2.41 / 个
查看数据手册 →PIC24FJ256GA702-I/SO
✅ 直接替换✓ 有现货
$2.3 / 个
查看数据手册 →PIC24FJ64GA002-I/SO
✅ 直接替换✓ 有现货
$3.78 / 个
查看数据手册 →PIC24FJ48GA002-I/SO
✅ 直接替换✓ 有现货
$0.83 / 个
查看数据手册 →PIC24FJ16GA002-I/SO
✅ 直接替换✓ 有现货
$2.27 / 个
查看数据手册 →PIC24FJ64GA702-I/SO 最大额定值与电气特性
| Core Architecture | PIC24F (16-bit modified Harvard) |
| CPU Speed (max) | 32 MHz |
| Program Memory (Flash) | 64 KB (22K x 24) ECC Flash |
| Data Memory (RAM) | 16 KB |
| Operating Voltage | 2.0 V to 3.6 V |
| ADC | 12-bit, up to 200 ksps |
| ADC Channels | Up to 14 analog inputs (package-dependent) |
| Comparators | 3 |
| DMA Channels | 6 |
| CTMU (Touch) | Yes |
| 工作温度 | -40 C to +85 C (industrial, "I") |
| 封装 | 28-SOIC (0.295", 7.50 mm width) |
| 安装类型 | Surface Mount |
| RoHS 状态 | Compliant |
PIC24FJ64GA702-I/SO 引脚配置
| 引脚 1 | RA0 — PORTA bit 0; analog-capable; CTMU |
| 引脚 2 | RA1 — PORTA bit 1; analog-capable |
| 引脚 3 | RA2 — PORTA bit 2; analog-capable |
| 引脚 4 | RA3 — PORTA bit 3; analog-capable |
| 引脚 5 | RA4 — PORTA bit 4 |
| 引脚 6 | RA5 — PORTA bit 5 |
| 引脚 7 | RA6 — PORTA bit 6; OSC2 |
| 引脚 8 | RA7 — PORTA bit 7; OSC1 |
| 引脚 9 | VSS — Ground |
| 引脚 10 | RB0 — PORTB bit 0; analog-capable; CTMU |
| 引脚 11 | RB1 — PORTB bit 1; analog-capable; CTMU |
| 引脚 12 | RB2 — PORTB bit 2; analog-capable; CTMU |
| 引脚 13 | RB3 — PORTB bit 3; analog-capable; CTMU |
| 引脚 14 | RB4 — PORTB bit 4; analog-capable |
| 引脚 15 | RB5 — PORTB bit 5; analog-capable |
| 引脚 16 | RB6 — PORTB bit 6; ICS programming clock |
| 引脚 17 | RB7 — PORTB bit 7; ICS programming data |
| 引脚 18 | AVSS — Analog ground |
| 引脚 19 | VDD — Digital supply voltage 2.0-3.6 V |
| 引脚 20 | MCLR — Master clear reset; active-low; pull-up required |
| 引脚 21 | RC0 — PORTC bit 0 |
| 引脚 22 | RC1 — PORTC bit 1 |
| 引脚 23 | RC2 — PORTC bit 2 |
| 引脚 24 | RC3 — PORTC bit 3 |
| 引脚 25 | RC4 — PORTC bit 4 |
| 引脚 26 | RC5 — PORTC bit 5 |
| 引脚 27 | AVDD — Analog supply voltage |
| 引脚 28 | VSS — Ground |
典型应用
PIC24FJ64GA702-I/SO 适用于 6 应用s: Low-Power IoT Sensor Node, Capacitive Touch HMI / Keypad, Portable Medical Instrumentation, Industrial Control / Factory Sensor Module, USB Peripheral / HID Device, Battery-Powered Consumer Device with LCD.
Low-Power IoT Sensor Node
The PIC24FJ64GA702-I/SO suits battery-powered IoT sensor nodes because its eXtreme Low Power technology and 2.0-3.6 V operation enable long runtime from 2x AA or coin-cell sources. Its 32 MHz CPU handles wireless-stack processing for protocols such as LoRaWAN, Zigbee, or BLE HCI when paired with an external radio. The 16 KB RAM accommodates network stacks while the 64 KB Flash stores application, bootloader, and OTA update images. The CTMU (Charge Time Measurement Unit) supports capacitive water-level or soil-moisture sensing without an external touch IC. Compared to a discrete 8-bit MCU + sensor solution this part consolidates ADC, comparators, and DMA into one chip.
推荐
Capacitive Touch HMI / Keypad
The PIC24FJ64GA702-I/SO is a strong fit for capacitive touch human-machine interfaces thanks to its on-chip CTMU and up to 14 analog input channels. The CTMU provides a precision current source for charge-time measurement, enabling up to 14 touch buttons or a small matrix keypad without a dedicated touch IC, which reduces BOM cost and PCB area. The 32 MHz CPU runs debouncing, slider/gesture algorithms, and LED/PWM feedback in real time. Industrial temperature grade (-40 C to +85 C) supports appliance and industrial control panels. The 12-bit ADC also handles ambient light or proximity sensing alongside the touch channels for a unified front-panel MCU.
推荐
Portable Medical Instrumentation
The PIC24FJ64GA702-I/SO fits portable medical devices such as pulse oximeters, glucose meters, and wearable vital-sign monitors where low power, deterministic interrupt response, and 16-bit ADC precision matter. The 12-bit ADC at 200 ksps supports SpO2 and ECG front-end sampling, and the ECC Flash provides single-bit error correction for safety-critical firmware. The 16 KB RAM holds sensor buffers and Bluetooth HCI command queues. Operating from a single Li-ion cell (3.0-3.6 V) the MCU meets the rail of most battery-powered medical designs. Compared to 32-bit Cortex-M alternatives, the PIC24F GA offers comparable peripheral integration at lower power in sleep modes.
推荐
Industrial Control / Factory Sensor Module
The PIC24FJ64GA702-I/SO serves as a smart sensor or actuator controller on the factory floor because of its industrial -40 C to +85 C temperature grade, 32 MHz CPU, and 6-channel DMA for high-throughput communication. UART/SPI/I2C peripherals connect to digital sensors, isolated gate drivers, and RS-485 transceivers. The 12-bit ADC reads 4-20 mA current loops and bridge sensor outputs, while the comparators handle fast overcurrent or overtemperature protection without CPU intervention. ECC Flash mitigates soft-bit upsets in electrically noisy industrial enclosures. The 28-SOIC package simplifies hand-soldered prototype and field-service repairs.
推荐
USB Peripheral / HID Device
The PIC24FJ64GA702 family integrates a USB 2.0 Full-Speed controller on selected members, making the PIC24FJ64GA702-I/SO appropriate for USB HID, CDC, or vendor-class peripherals such as custom keyboards, mice, barcode scanners, and configuration tools. The 16 KB RAM holds USB endpoint buffers and protocol descriptors, while 64 KB Flash provides ample room for composite USB stacks and HID report tables. The DMA engine offloads endpoint memory transfers, freeing CPU cycles for user application logic. Compared to Freescale/Motorola HCS08 USB parts, the PIC24F GA offers more RAM and active power-saving modes.
推荐
Battery-Powered Consumer Device with LCD
The PIC24FJ64GA702-I/SO drives small segment or graphic LCDs in battery-powered consumer products such as remote controls, smart thermostats, and personal electronics. Its parallel display interface and CTMU simplify integration with capacitive touch overlays, while eXtreme Low Power idle current extends battery life. The 64 KB Flash holds fonts, menu trees, and BLE or sub-GHz firmware. Compared to 8-bit PIC16 alternatives, the 16-bit CPU and 16 KB RAM enable smooth menu animations and over-the-air update handlers. The 28-SOIC footprint eases layout and rework in small enclosures.
推荐
推荐产品汇总
工程参考数据： PIC24FJ64GA702-I/SO ——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 | PIC24FJ64GA702-I/MV | PIC24FJ64GA702-E/SO | PIC24FJ256GA702-I/SO | PIC24FJ64GA002-I/SO | PIC24FJ48GA002-I/SO | PIC24FJ16GA002-I/SO |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SOIC (0.295 in, 7.50 mm) | 28-UQFN (MV) - different footprint, not SOIC drop-in | 28-SOIC (0.295 in, 7.50 mm) - same | 28-SOIC (0.295 in, 7.50 mm) - same | 28-SOIC (0.295 in, 7.50 mm) - same | 28-SOIC (0.295 in, 7.50 mm) - same | 28-SOIC (0.295 in, 7.50 mm) - same |
| Program Flash | 64 KB (22K x 24) ECC | 64 KB ECC | 64 KB ECC | 256 KB ECC | 64 KB (no ECC) | 48 KB (no ECC) | 16 KB (no ECC) |
| RAM | 16 KB | 16 KB | 16 KB | 16 KB | 8 KB | 8 KB | 4 KB |
| DMA Controller | 6 channels | 6 channels | 6 channels | 6 channels | No DMA | No DMA | No DMA |
| CTMU (Capacitive Touch) | Yes | Yes | Yes | Yes | No | No | No |
| Operating Temperature | -40 C to +85 C (I grade) | -40 C to +85 C (I grade) | -40 C to +125 C (E grade) | -40 C to +85 C (I grade) | -40 C to +85 C (I grade) | -40 C to +85 C (I grade) | -40 C to +85 C (I grade) |
关键差异点
- Same-package family with extended temperature grade （对比 PIC24FJ64GA702-E/SO)
- Same-package upgrade path to 4x Flash headroom （对比 PIC24FJ256GA702-I/SO)
- On-chip DMA + CTMU vs older GA002 family （对比 PIC24FJ64GA002-I/SO)
设计说明
Decouple VDD with a 10 uF bulk ceramic plus a 0.1 uF X7R placed within 5 mm of the VDD pin; add an identical pair on AVDD. The PIC24FJ64GA702-I/SO has separate digital and analog supply domains, and failing to isolate them with a ferrite bead or filter can couple switching noise from the digital core into the ADC readings. Brown-out reset is enabled by configuration bits - leave it enabled so VDD droops do not corrupt the ECC Flash during write operations.
Route the 28-SOIC SOIC layout with at least 8 mil traces and 8 mil clearance to support hand rework. Place the 32.768 kHz low-power RTC crystal within 5 mm of RA6/OSC2 and RA7/OSC1 (or use the secondary oscillator on the RB6/RB7 PPS pins) to minimize parasitic capacitance. Use a continuous ground plane under the part to improve EMI and thermal performance; the SOIC dissipates very little power but ground-plane stitching is still recommended for clean ADC sampling.
Do not forget the MCLR pull-up resistor - the PIC24FJ64GA702-I/SO will not start reliably without a 10 kohm pull-up to VDD on pin 20. Avoid using RB6/RB7 as ordinary GPIO if you also use ICSP programming, because the debugger drives these pins and they will fight the external circuit. Ensure the ADC channel count matches the package - the 28-SOIC exposes fewer analog-capable pins than the 44-pin or 48-pin QFN/TQFP variants of the same family.
合规信息
RoHS compliant per Microchip product page and JLCPCB listing. Industrial temperature grade (-40 C to +85 C). Not AEC-Q100 qualified; for automotive select PIC24FJ...-E or PIC24FJ...-VA variants.
