PIC24FJ32GA102-I/ML - 32KB Flash 16-bit MCU | Microchip 28-QFN
MPN： PIC24FJ32GA102-I/ML ✓ 啟用中PIC24FJ32GA102-I/ML 概覽
A PIC microcontroller is a compact programmable processor that integrates CPU, non-volatile Flash, working RAM, and digital/analog peripherals onto a single silicon die. The 16-bit PIC24F line sits between the 8-bit PIC18 and 32-bit PIC32 families, occupying the low-power and signal-conditioning niche. PIC24F XLP parts explicitly target battery-friendly designs through nanoWatt XLP technology that enables deep sleep currents in the nanoamp range while preserving full register retention and rapid wake-up.
Key features of the PIC24FJ32GA102-I/ML include 21 general-purpose I/O, two analog comparators with programmable reference, hardware Real-Time Clock and Calendar (RTCC) with timestamp capture, four 16-bit timers, and four Input Capture/Output Compare modules. Brown-out Reset, Low-Voltage Detect, Power-on Reset, and a Watchdog Timer with on-chip low-power RC oscillator provide multi-layer system safety. The integrated USB 2.0 full-speed (12 Mbps) peripheral is absent on the -102 variant; it is present on the larger -104 and -106 derivatives of the family. The 28-QFN package exposes a thermal pad for low thermal resistance, helping dissipate heat in enclosed industrial enclosures.
The PIC24FJ32GA102 architecture uses a 16-bit data path with 24-bit instructions and a hardware multiplier that can issue a 16x16 multiplication in a single cycle, accelerating DSP-style math operations such as FIR filters or sensor fusion routines. The internal 8 MHz Fast RC oscillator can be combined with the 32 kHz low-power oscillator through the Fail-Safe Clock Monitor for robust operation across -40C to +125C industrial environments.
Typical applications include low-power IoT sensor nodes, USB human-interface devices, industrial control panels, building automation, portable medical instruments, and capacitive-touch human interfaces. Designers pick this part for sleep currents measured in nanoamps, sufficient Flash for protocol stacks such as USB HID or Modbus, and a 16-bit architecture that simplifies PID loops, RMS calculations, and motor control timing.
When designing with this part, place the decoupling capacitor (0.1 uF + 1 uF) within 3 mm of VDD/VSS, expose the QFN thermal pad to a 6x6 mm copper pour with at least eight thermal vias, and configure the Configuration bits in code to enable low-voltage programming and the requested oscillator mode. Avoid driving I/O above VDD + 0.3 V to prevent latch-up.
This page synthesizes distributor pricing, drop-in QFN-28 alternatives, recommended companion parts, and practical design notes that the bare Microchip datasheet does not aggregate.
直接替換替代品，適用於 PIC24FJ32GA102-I/ML — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： PIC24FJ32GA102-I/ML （相同外形與佔位） — 差異在於 ADC, Package, Program Memory (Flash), Core Architecture, Timers.
PIC24FJ32GA102-I/SO
✅ 直接替換聯絡詢價
查看資料表 →PIC24FJ32GA002-I/ML
✅ 直接替換📋 參考替代品（不在目錄中）
PIC24FJ32GA004-I/ML
✅ 直接替換📋 參考替代品（不在目錄中）
PIC24FJ32GA104-I/ML
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →PIC24FJ16MC102T-I/ML
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →PIC24FJ32GA102-I/ML 最大額定值與電氣特性
| Core Architecture | PIC24F (16-bit modified Harvard) |
| CPU Speed | 32 MHz / 16 MIPS |
| Program Memory (Flash) | 32 KB (11K x 24) |
| Data Memory (SRAM) | 8 KB |
| I/O Pins | 21 |
| ADC | 10-bit, 10 channels |
| PWM Channels | 5 |
| Timers | 4 x 16-bit |
| Input Capture / Output Compare | 4 modules |
| Analog Comparators | 2 |
| Communication Interfaces | I2C, SPI, IrDA, UART/USART |
| Operating Voltage | 2.0 V to 3.6 V |
| 工作溫度 | -40C to +85C (Industrial, -I suffix) |
| 封裝 | 28-QFN (6x6 mm) with exposed thermal pad (ML) |
| 安裝類型 | Surface Mount |
| MSL 等級 | 1 (per JEDEC J-STD-020) |
| Low-Power Technology | nanoWatt XLP |
| RoHS 狀態 | Compliant |
PIC24FJ32GA102-I/ML 腳位配置
| 腳位 1 | RA0/AN0 — Digital I/O / Analog input 0 |
| 腳位 2 | RA1/AN1 — Digital I/O / Analog input 1 |
| 腳位 3 | RA2/AN2 — Digital I/O / Analog input 2 |
| 腳位 4 | RA3/AN3 — Digital I/O / Analog input 3 |
| 腳位 5 | RA4/AN4 — Digital I/O / Analog input 4 |
| 腳位 6 | AVDD — Analog supply voltage |
| 腳位 7 | AVSS — Analog ground |
| 腳位 8 | RA7/AN7 — Digital I/O / Analog input 7 |
| 腳位 9 | RA8/AN8 — Digital I/O / Analog input 8 |
| 腳位 10 | RA9/AN9 — Digital I/O / Analog input 9 |
| 腳位 11 | RB0/AN10 — Digital I/O / Analog input 10 / PGED1 |
| 腳位 12 | RB1/AN11 — Digital I/O / PGEC1 |
| 腳位 13 | RB2 — Digital I/O / OC1 |
| 腳位 14 | RB3 — Digital I/O / OC2 |
| 腳位 15 | RB4 — Digital I/O / IC1 |
| 腳位 16 | RB5 — Digital I/O / IC2 |
| 腳位 17 | RB6 — Digital I/O / IC3 / PGED2 |
| 腳位 18 | RB7 — Digital I/O / IC4 / PGEC2 |
| 腳位 19 | VSS — Digital ground |
| 腳位 20 | VCAP — 1.8V core regulator output - 10 uF to VSS |
| 腳位 21 | RB8 — Digital I/O |
| 腳位 22 | RB9 — Digital I/O |
| 腳位 23 | RB10 — Digital I/O |
| 腳位 24 | RB11 — Digital I/O |
| 腳位 25 | VDD — Digital supply voltage (2.0-3.6 V) |
| 腳位 26 | OSC1/CLKI — Crystal oscillator input / external clock |
| 腳位 27 | OSC2/CLKO — Crystal oscillator output |
| 腳位 28 | MCLR — Master clear (reset) - active low |
典型應用
PIC24FJ32GA102-I/ML 適用於 6 應用s: Low-Power IoT Sensor Nodes, Industrial Control Panels, Portable Medical Instruments, Building Automation Controllers, Capacitive-Touch Human Interfaces, USB HID Peripherals (with -104 upgrade).
Low-Power IoT Sensor Nodes
The PIC24FJ32GA102-I/ML's nanoWatt XLP technology enables sleep currents measured in tens of nanoamps, making it ideal for battery-powered IoT sensor nodes that must run for years on a single CR2032 cell. The 32 KB Flash stores over-the-air update bootloaders and small protocol stacks such as Modbus RTU, while 8 KB RAM holds sensor frame buffers. The 10-channel, 10-bit ADC samples temperature, humidity, and battery voltage without external components, and UART/USART interfaces connect to BLE or LoRa daughter modules. Typical duty cycle is 0.1% active, with the rest spent in deep sleep woken by RTCC or external interrupt.
推薦
Industrial Control Panels
In industrial control panels the PIC24FJ32GA102-I/ML acts as the HMI controller, reading pushbuttons and rotary encoders via the four Input Capture modules and driving indicator LEDs through five PWM channels for variable-brightness feedback. The 21 I/O lines interface to keypad matrices, LCD character displays, and RS-485 transceivers for Modbus networking. The -40C to +85C industrial temperature range plus brown-out reset, low-voltage detect, and watchdog timer provide robust operation in factory environments. The 28-QFN with exposed thermal pad handles continuous 16 MIPS operation without heatsinking.
推薦
Portable Medical Instruments
Portable medical instruments benefit from the PIC24FJ32GA102-I/ML's combination of low power consumption, 16-bit math precision, and reliable ADC performance. The 10-bit ADC reads analog sensor front-ends such as pulse oximeter photodiodes or ECG leads at 500 ksps, while the 16 MIPS core runs moving-average filters and peak detection in real time. The 32 KB Flash accommodates USB HID class drivers for direct PC connectivity, and 8 KB RAM buffers 1-second ECG sample windows at 1 kHz. IEC 60730 Class B firmware safety routines (clock monitor, BOR, WDT) are supported by the device hardware to ease medical compliance.
推薦
Building Automation Controllers
The PIC24FJ32GA102-I/ML fits inside building automation controllers for HVAC zoning, lighting control, and occupancy-based fan regulation. UART/USART links to Modbus RTU masters or BACnet MS-TP networks; SPI interfaces to EEPROM or FRAM for logging; I2C drives digital temperature/humidity sensors and CO2 NDIR modules. The five PWM channels drive LED dimmers, valve actuators, or small DC fans at 1 kHz without CPU overhead thanks to the hardware PWM peripheral. The hardware RTCC timestamps occupancy and temperature logs even in deep sleep, supporting energy-audit compliance.
推薦
Capacitive-Touch Human Interfaces
Capacitive-touch buttons, sliders, and proximity sensors benefit from the PIC24FJ32GA102-I/ML's integrated Charge Time Measurement Unit (CTMU), which provides precise capacitance measurement using the on-chip current source and ADC. The 10-bit ADC plus CTMU yields millisecond response times for up to 10 touch channels, and the 32 KB Flash runs Microchip's mTouch firmware library for gesture decoding. The 16 MIPS core handles multi-touch scanning and LED feedback PWM, and the QFN-28 package keeps the BOM small for compact touch panels.
推薦
USB HID Peripherals (with -104 upgrade)
For USB Human Interface Device designs, the PIC24FJ32GA102 family offers pin-compatible upgrade to PIC24FJ32GA104-I/ML, which integrates a full-speed USB 2.0 peripheral and 1.5 kB endpoint RAM. The 16 MIPS core runs HID class drivers in 32 KB Flash with USB stack overhead under 12 KB, leaving room for application logic. The 10-bit ADC provides analog input support for 3D mice, game controllers, or touchpads, while 5 PWM channels drive RGB LED feedback. The QFN-28 footprint matches the original -102 part so existing PCBs can be reused with firmware recompile.
推薦
推薦產品摘要
工程參考資料，適用於 PIC24FJ32GA102-I/ML — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | PIC24FJ32GA102-I/SO | PIC24FJ32GA002-I/ML | PIC24FJ32GA104-I/ML | PIC24FJ16MC102T-I/ML |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-QFN (6x6 mm) | 28-SOIC wide body | 28-QFN (6x6 mm) - same | 28-QFN (6x6 mm) - same | 28-QFN (6x6 mm) - same |
| CPU Speed | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS |
| Flash | 32 KB | 32 KB | 32 KB | 32 KB | 16 KB |
| RAM | 8 KB | 8 KB | 8 KB | 8 KB | 2 KB |
| I/O Pins | 21 | 21 | 21 | 21 | 21 |
| Hardware RTCC | Yes | Yes | No | Yes | No |
| USB 2.0 Peripheral | No | No | No | Yes (Full-Speed) | No |
| ADC | 10-bit, 10 channels | 10-bit, 10 channels | 10-bit, 10 channels | 10-bit, 13 channels | 10-bit, 10 channels |
主要差異化特點
- Integrated hardware RTCC with timestamp and deep-sleep wake (對比PIC24FJ32GA002-I/ML)
- Full-speed USB 2.0 peripheral in the same QFN-28 footprint (對比PIC24FJ32GA104-I/ML)
- Largest Flash/RAM in the 28-QFN PIC24FJ XLP family (對比PIC24FJ16MC102T-I/ML)
設計說明
Decouple VDD with a 0.1 uF ceramic plus 1 uF ceramic in parallel, placed within 3 mm of the VDD/VSS pin pair. The QFN-28 thermal pad must be soldered to a ground pour of at least 6x6 mm with at least 8 thermal vias (0.3 mm drill, 0.6 mm pad) connecting the top copper to an internal ground plane. Without the thermal pad properly soldered, junction-to-ambient thermal resistance rises and DC output drive capability is degraded.
The on-chip 1.8 V regulator requires a 10 uF ceramic capacitor on the VCAP pin to VSS for stable operation; ceramic X5R or X7R dielectric is recommended for low ESR. Estimated: when the PIC24FJ32GA102-I/ML runs continuously at 32 MHz from 3.3 V, core current consumption is ~25 mA per datasheet typical; sleep current with RTCC is 0.4 uA typical, supporting multi-year battery life at 0.1% duty cycle.
Do not leave MCLR floating - tie it to VDD through a 10 kohm pull-up resistor or directly to VDD if no external reset is required. Ensure Configuration bits are set in code (not just defaults) to select the desired oscillator mode and disable the watchdog only if your firmware includes equivalent software supervision. Driving an I/O above VDD + 0.3 V or below VSS - 0.3 V can trigger latch-up; add clamping diodes if signals exceed these limits.
Keep ADC analog traces short and isolated from PWM/UART switching traces to avoid digital-to-analog crosstalk. Place the AVSS analog ground star-ground to a single point near the AVSS pin rather than sharing the digital ground pour. For low-noise ADC measurements, the AVDD supply should be filtered with a 10 ohm resistor and 100 nF capacitor.
合規資訊
RoHS and REACH compliant per Microchip product page. Not AEC-Q100 qualified - use AEC-Q100-grade PIC24F variants for automotive. Halogen-free per Microchip environmental compliance documentation.
