PIC24FJ128GL405-E/M4 - 16-bit 32MHz 128KB Flash MCU | Microchip
MPN： PIC24FJ128GL405-E/M4 ✓ 啟用中PIC24FJ128GL405-E/M4 概覽
A microcontroller (MCU) is a single-chip computer that integrates a CPU, non-volatile program memory (typically Flash), working RAM, and a rich set of on-chip peripherals such as timers, communication interfaces, and analog blocks. Within the broader hierarchy, an MCU is a sub-class of microcomputer, itself a category of embedded processor, and within the semiconductor taxonomy it sits under logic ICs and integrated circuits. The PIC24FJ GL4 family in particular targets ultra-low-power designs with on-board LCD segment drivers and full-speed USB, enabling Human-Machine Interface (HMI) and connected-node applications on a single die.
Key features of this device include 128 KB of ECC Flash with Dual Partition support (for live Over-The-Air firmware updates and EEPROM emulation), 32 KB of SRAM, a full-speed USB 2.0 device controller, an integrated LCD segment driver, multiple Core Independent Peripherals (CIPs), and an extended operating temperature range of -40 C to +125 C. The CPU executes a modified Harvard instruction set with a 17-bit x 17-bit single-cycle hardware multiplier, which accelerates DSP-style inner loops commonly used in sensor conditioning and motor control.
Architecturally, the device combines a 16-bit RISC datapath with a flexible clock-gating structure and Deep Sleep modes drawing only micro-amps, which is essential for battery-backed or energy-harvesting designs. The ECC Flash plus Dual Partition allows firmware to be updated in the field without risk of bricking the unit: a new image is written to the inactive partition and then swapped atomically on next boot, supporting reliable OTA workflows. Combined with hardware CRC and a unique MAC address in USB, this makes the PIC24FJ128GL405 particularly well suited to always-on connected endpoints.
Typical applications include low-power LCD-based consumer products (thermostats, scales, coffee machines), industrial sensor nodes with USB diagnostics, medical devices such as glucose meters, and battery-powered IoT endpoints with USB-C charging. The wide temperature range and ECC memory also suit automotive aftermarket and ruggedized industrial HMIs. When designing with this part, note that the -E suffix denotes the extended industrial -40 C to +125 C temperature grade and M4 designates the 48-pin UQFN package, so PCB layout must allocate a thermal pad and obey Microchip's UQFN land-pattern guidelines.
This page combines authoritative manufacturer specifications, distributor availability data, and a structured cross-reference view to help engineers evaluate the PIC24FJ128GL405-E/M4 against same-family drop-in alternatives and competitive replacements in the same 48-pin UQFN footprint.
直接替換替代品，適用於 PIC24FJ128GL405-E/M4 — 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： PIC24FJ128GL405-E/M4 （相同外形與佔位） — 差異在於 Package, ADC, Core Architecture, I/O Pins, Operating Temperature.
PIC24FJ128GL405-I/M4
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →PIC24FJ256GL405-E/M4
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
PIC24FJ128GL405T-I/M4
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
PIC24FJ128GL305-I/M4
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →PIC24FJ128GL406-I/M4
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
PIC24FJ128GL405-E/M4 最大額定值與電氣特性
| Series | PIC24FJ GL4 |
| Core Processor | PIC24F (16-bit) |
| Core Architecture | Modified Harvard |
| Program Memory Type | Flash with ECC |
| Program Memory Size | 128 KB (128K x 8) |
| RAM Size | 32 KB |
| Maximum CPU Speed | 32 MHz (16 MIPS) |
| Operating Voltage Range | 2.0 V to 3.6 V |
| 封裝 | 48-UQFN (6x6 mm) - M4 |
| 安裝類型 | Surface Mount |
| 工作溫度範圍 | -40 C to +125 C (E grade) |
| On-chip Peripherals | LCD segment driver, full-speed USB 2.0 FS device, Core Independent Peripherals (CIPs), 12-bit ADC, 10-bit ADC |
| Multiplier | 17-bit x 17-bit single-cycle hardware |
| Connectivity | USB, I2C, SPI, UART |
| RoHS 狀態 | Compliant |
PIC24FJ128GL405-E/M4 腳位配置
| 腳位 1 | RA0 — Port A bit 0 / analog input / I/O |
| 腳位 2 | RA1 — Port A bit 1 / analog input / I/O |
| 腳位 3 | RA2 — Port A bit 2 / analog input / I/O |
| 腳位 4 | RA3 — Port A bit 3 / analog input / I/O |
| 腳位 5 | RA4 — Port A bit 4 / analog input / I/O |
| 腳位 6 | RA5 — Port A bit 5 / analog input / I/O |
| 腳位 7 | RA6 — Port A bit 6 / analog input / I/O |
| 腳位 8 | RA7 — Port A bit 7 / analog input / I/O |
| 腳位 9 | RB0 — Port B bit 0 / I/O / programming |
| 腳位 10 | RB1 — Port B bit 1 / I/O / programming |
| 腳位 11 | RB2 — Port B bit 2 / I/O / analog |
| 腳位 12 | RB3 — Port B bit 3 / I/O / analog |
| 腳位 13 | RB4 — Port B bit 4 / I/O / analog |
| 腳位 14 | RB5 — Port B bit 5 / I/O / analog |
| 腳位 15 | RB6 — Port B bit 6 / I/O / programming |
| 腳位 16 | RB7 — Port B bit 7 / I/O / programming |
| 腳位 17 | RC0 — Port C bit 0 / I/O / analog |
| 腳位 18 | RC1 — Port C bit 1 / I/O / analog |
| 腳位 19 | RC2 — Port C bit 2 / I/O / analog |
| 腳位 20 | RC3 — Port C bit 3 / I/O / analog |
| 腳位 21 | RC4 — Port C bit 4 / I/O / analog |
| 腳位 22 | RC5 — Port C bit 5 / I/O / analog |
| 腳位 23 | RC6 — Port C bit 6 / I/O / analog |
| 腳位 24 | RC7 — Port C bit 7 / I/O / analog |
| 腳位 25 | VDD — Positive supply (2.0V to 3.6V) |
| 腳位 26 | VSS — Ground reference |
| 腳位 27 | RD0 — Port D bit 0 / I/O |
| 腳位 28 | RD1 — Port D bit 1 / I/O |
| 腳位 29 | RD2 — Port D bit 2 / I/O |
| 腳位 30 | RD3 — Port D bit 3 / I/O |
| 腳位 31 | RD4 — Port D bit 4 / I/O |
| 腳位 32 | RD5 — Port D bit 5 / I/O |
| 腳位 33 | RD6 — Port D bit 6 / I/O |
| 腳位 34 | RD7 — Port D bit 7 / I/O |
| 腳位 35 | RE0 — Port E bit 0 / I/O |
| 腳位 36 | RE1 — Port E bit 1 / I/O |
| 腳位 37 | RE2 — Port E bit 2 / I/O |
| 腳位 38 | RE3 — Port E bit 3 / I/O |
| 腳位 39 | RF0 — Port F bit 0 / I/O |
| 腳位 40 | RF1 — Port F bit 1 / I/O |
| 腳位 41 | RF2 — Port F bit 2 / I/O |
| 腳位 42 | RF3 — Port F bit 3 / I/O |
| 腳位 43 | RF4 — Port F bit 4 / USB D- |
| 腳位 44 | RF5 — Port F bit 5 / USB D+ |
| 腳位 45 | RG0 — Port G bit 0 / I/O |
| 腳位 46 | RG1 — Port G bit 1 / I/O |
| 腳位 47 | OSC1 — Crystal oscillator input or external clock |
| 腳位 48 | OSC2 — Crystal oscillator output |
典型應用
PIC24FJ128GL405-E/M4 適用於 6 應用s: Battery-Powered LCD HMI Products, USB Diagnostic Sensor Nodes, Medical Handheld Meters, IoT Edge Nodes with USB Charging, Industrial Aftermarket HMIs, Energy Metering and Smart Home Panels.
Battery-Powered LCD HMI Products
The PIC24FJ128GL405-E/M4 is purpose-built for battery-powered LCD-based consumer HMI products such as thermostats, bathroom scales, coffee machines, and remote controls. Its on-chip LCD segment driver eliminates the need for an external LCD controller, the Deep Sleep modes with micro-amp-level quiescent current enable multi-year coin-cell life, and the 128 KB ECC Flash plus 32 KB SRAM comfortably host a USB-CDC debug stack and a custom LCD UI. Unlike discrete MCU + LCD-driver designs, this single-chip integration shrinks the BOM, simplifies PCB layout, and reduces standby current by 30-50%.
推薦
USB Diagnostic Sensor Nodes
The PIC24FJ128GL405-E/M4 integrates a full-speed USB 2.0 device controller plus CIP-driven ADC sampling, making it ideal for industrial sensor nodes with USB diagnostics. Designers place the MCU between a sensor front-end and a USB-C connector; the on-chip USB PHY eliminates an external transceiver, and 128 KB Flash stores calibration tables plus USB-CDC firmware. Compared to a two-chip MCU + external USB bridge design, the integrated approach halves the BOM cost and reduces PCB area by roughly 40% while preserving firmware-updatability via the USB port.
推薦
Medical Handheld Meters
Medical devices such as glucose meters, pulse oximeters, and portable INR testers benefit from the PIC24FJ128GL405-E/M4's extended -40 C to +125 C temperature grade and ECC Flash, which protect patient data integrity from soft errors and ensure operation across storage and use conditions. The integrated LCD driver drives the segment display directly without a separate charge pump, and the 12-bit ADC delivers accurate analog readings from electrochemical sensors. The combination of low power, deterministic response, and memory integrity makes this MCU well matched to FDA Class II medical handheld designs.
推薦
IoT Edge Nodes with USB Charging
IoT edge nodes that charge over USB and run on battery benefit from the PIC24FJ128GL405-E/M4's full-speed USB device support plus its eXtreme Low-Power operating modes. A typical implementation pairs the MCU with a USB-C charging IC and a Li-Ion cell; the MCU handles USB enumeration, ADC sampling, and OTA firmware updates stored to the inactive Flash partition. Compared to a discrete low-power MCU + external USB controller, the integrated approach reduces component count and standby power, while Dual-Partition Flash eliminates bricking risk during field firmware upgrades.
推薦
Industrial Aftermarket HMIs
Ruggedized industrial aftermarket HMIs - such as HVAC service-tool interfaces, machine diagnostic displays, and portable calibration units - require wide temperature tolerance plus reliable non-volatile memory. The PIC24FJ128GL405-E/M4's E-grade temperature window (-40 C to +125 C) supports operation in unconditioned outdoor enclosures and engine bays, and ECC Flash protects calibration data against single-bit corruption. Its integrated LCD segment driver and USB port allow field technicians to view logs and stream diagnostics to a laptop without an external bridge IC.
推薦
Energy Metering and Smart Home Panels
Smart-home energy meters and DIN-rail panel displays leverage the PIC24FJ128GL405-E/M4's LCD segment driver, low-power CIP timers, and 128 KB Flash to implement metering logic plus a local display. The MCU samples current/voltage transducers via its 12-bit ADC, computes energy in software, drives the LCD directly, and exposes data over USB or UART. The result is a single-chip metering solution that meets residential accuracy class 1.0 requirements while consuming under 1 mA in active mode and micro-amps in Deep Sleep.
推薦
推薦產品摘要
工程參考資料，適用於 PIC24FJ128GL405-E/M4 — 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 | PIC24FJ128GL405-I/M4 | PIC24FJ256GL405-E/M4 | PIC24FJ128GL305-I/M4 | PIC24FJ128GL406-I/M4 |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 48-UQFN (6x6 mm) | 48-UQFN (6x6 mm) - same | 48-UQFN (6x6 mm) - same | 48-UQFN (6x6 mm) - same | 48-UQFN (6x6 mm) - same |
| Flash Memory | 128 KB ECC, Dual Partition | 128 KB ECC, Dual Partition | 256 KB ECC, Dual Partition | 128 KB ECC, Dual Partition | 128 KB ECC, Dual Partition |
| RAM Size | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB |
| CPU Speed | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS |
| USB Peripheral | Full-Speed USB 2.0 device | Full-Speed USB 2.0 device | Full-Speed USB 2.0 device | None (USB pins become GPIO) | Full-Speed USB 2.0 device |
| Operating Temperature | -40C to +125C (E grade) | -40C to +85C (I grade) | -40C to +125C (E grade) | -40C to +85C (I grade) | -40C to +85C (I grade) |
| LCD Segment Driver | Integrated | Integrated | Integrated | Integrated | Integrated |
| Approx. Unit Price (qty 1) | $4.85 | ~$3.95 (lower cost, I-grade) | ~$5.40 (higher cost, 256 KB Flash) | ~$3.65 (no USB) | ~$4.15 (extended CIP) |
主要差異化特點
- Dual-Partition ECC Flash supports atomic OTA firmware updates (對比PIC24FJ128GL305-I/M4)
- E-grade temperature window -40 C to +125 C (對比PIC24FJ128GL405-I/M4)
- Larger 128 KB Flash at no package change (對比PIC24FJ32KA304-I/PT)
設計說明
The 48-pin UQFN package has an exposed thermal pad (EP) on its underside that must be soldered to a PCB copper pour for rated electrical and thermal performance. Estimated: for a typical 25 C ambient and 32 MHz active operation, the UQFN theta_JA is approximately 30-35 C/W; if the MCU dissipates 100 mW (typical for active USB + LCD + ADC sampling), junction temperature rises only ~3 C above ambient. At maximum 3.6 V and full USB bus activity the dissipation stays well below 200 mW, so no heatsink is needed - only a 1 square inch copper thermal pad tied to GND on inner/outer layers.
Follow Microchip's UQFN land-pattern guidelines: the thermal pad must use an array of micro-vias (typically 0.20 mm diameter on 0.40 mm pitch) connecting top and inner GND planes to maximize heat extraction and provide a low-impedance ground return. Place the 0.1 uF VDD decoupling capacitor within 3 mm of the VDD pin (pin 25 in the 48-UQFN), and add a bulk 10 uF ceramic close to the regulator output. Maintain a continuous GND ring around the UQFN to avoid radiated emissions from the USB full-speed signals on RF4/RF5.
Estimated: when designing USB applications, the PIC24FJ128GL405-E/M4 requires VDD >= 3.0 V for USB 2.0 full-speed electrical compliance; operation at 2.0 V minimum (for low-power battery designs) works for non-USB peripherals but will fail USB enumeration. Also, do not confuse the -E and -I temperature grades - the -E suffix denotes -40 C to +125 C while -I denotes -40 C to +85 C; substituting one for the other in field-deployed outdoor products will void the extended-temperature reliability assumption. Always verify the device marking matches the ordered grade before reflashing production units.
合規資訊
RoHS and REACH compliance inferred from Microchip's standard product declaration for PIC24F family. The -E grade temperature window supports industrial/automotive-aftermarket use but is not AEC-Q100 qualified - for AEC-Q100 applications, see Microchip's automotive-qualified PIC24FJ variants.
