PIC24FJ256GA406-I/MR - 16-bit XLP MCU 256KB Flash 64-QFN | Microchip
MPN： PIC24FJ256GA406-I/MR ✓ 啟用中PIC24FJ256GA406-I/MR 概覽
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash/ROM), data memory (RAM), and peripherals such as ADCs, timers, communication interfaces, and I/O controllers. The 16-bit class sits between 8-bit MCUs (typically used for simple control tasks) and 32-bit ARM Cortex-M parts (used for high-performance DSP and connectivity), offering a balanced mix of computational throughput, deterministic interrupt response, and low power consumption. The PIC24F family uses Microchip's modified Harvard architecture with separate program and data buses, allowing simultaneous instruction fetch and data access.
Key features of the PIC24FJ256GA406 include the integrated segmented LCD driver (up to 64 segments), which removes the need for an external LCD controller in display-based products, and the hardware crypto engine with intermediate code-guard security that protects intellectual property in deployed firmware. The XLP technology delivers deep-sleep currents in the nanoampere range and multiple power-saving modes such as Sleep, Idle, and Doze, enabling years of operation from a single coin cell. The 53 I/O pins are 5 V tolerant on many ports, allowing direct interfacing with legacy 5 V logic. Two UART/SPI/I2C peripherals, up to five 16-bit timers, and configurable remappable peripherals provide extensive design flexibility.
Architecturally, the device pairs the PIC24F modified Harvard CPU core with a wide peripheral set tuned for low-power embedded designs. The dual-partition Flash supports safe in-field firmware updates (one partition runs while the other is reprogrammed), and the on-chip 12-bit ADC reaches 500 ksps for sensor sampling. Hardware DSP extensions accelerate multiply-accumulate routines for sensor fusion or audio preprocessing. The combination of XLP power management, integrated crypto, segmented LCD, and dual-partition Flash is what differentiates this part from generic 16-bit MCUs without security or display support.
Typical applications include low-power human-interface products with LCD displays (thermostats, utility meters, medical infusion pumps, and weighing scales), secure IoT sensor nodes that require authenticated firmware and encrypted communications, battery-powered industrial data loggers, and portable consumer health monitors. The wide operating temperature range of -40 °C to +85 °C supports both consumer and industrial environments.
When designing with the PIC24FJ256GA406, ensure the exposed thermal pad on the QFN-64 package is soldered to a sufficiently large copper pour on the PCB to meet the thermal resistance rating and provide a low-impedance ground return. Decouple VDD/VSS pairs with 100 nF ceramic capacitors placed as close as possible to the respective pins, and follow Microchip's MPLAB X IDE and XC16 compiler toolchain for code development and debug via the integrated ICSP/ICD interface.
This page synthesizes distributor pricing tiers, drop-in alternatives from the PIC24F/XLP family, and practical design notes that complement (rather than restate) the manufacturer datasheet.
直接替換替代品，適用於 PIC24FJ256GA406-I/MR — 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： PIC24FJ256GA406-I/MR （相同外形與佔位） — 差異在於 Package, ADC, Core Architecture, LCD Driver, Timers.
PIC24FJ256GA406-I/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC24FJ256GA406T-I/MR
✅ 直接替換聯絡詢價
查看資料表 →PIC24FJ256GB406-I/MR
✅ 直接替換📋 參考替代品（不在目錄中）
PIC24FJ128GB406-I/MR
✅ 直接替換聯絡詢價
查看資料表 →PIC24FJ128GA406-I/MR
✅ 直接替換📋 參考替代品（不在目錄中）
PIC24FJ1024GA606-I/MR
✅ 直接替換聯絡詢價
查看資料表 →PIC24FJ256GA406-I/MR 最大額定值與電氣特性
| Core Architecture | PIC24F (16-bit modified Harvard) |
| Family | PIC24FJ256GA406 (XLP, integrated crypto) |
| CPU Speed (Max) | 32 MHz (16 MIPS @ 3.3 V) |
| Program Memory (Flash) | 256 KB (85.5K × 24) |
| Data Memory (RAM) | 16 KB |
| Supply Voltage (VDD) | 2.0 V to 3.6 V |
| I/O Pins | 53 |
| ADC | 10-bit and 12-bit, multi-channel |
| LCD Driver | Segmented LCD controller (up to 64 segments) |
| Security Module | Integrated crypto engine + code-guard security |
| Flash Partitions | Dual partition for live update |
| Communication | UART, SPI, I2C peripherals |
| Timers | Up to five 16-bit timers |
| 工作溫度 | -40 °C to +85 °C (industrial) |
| 封裝 | 64-pin QFN (MR), 9 mm × 9 mm with exposed pad |
| 安裝類型 | Surface Mount |
| RoHS 狀態 | Compliant |
PIC24FJ256GA406-I/MR 腳位配置
| 腳位 1 | RP15/RB15 — Remappable I/O / LCD segment |
| 腳位 2 | RP14/RB14 — Remappable I/O / LCD segment |
| 腳位 3 | RP13/RB13 — Remappable I/O / LCD segment |
| 腳位 4 | RP12/RB12 — Remappable I/O / LCD segment |
| 腳位 5 | RP11/RB11 — Remappable I/O / LCD segment |
| 腳位 6 | RP10/RB10 — Remappable I/O / LCD segment |
| 腳位 7 | RP9/RB9 — Remappable I/O / LCD segment |
| 腳位 8 | RP8/RB8 — Remappable I/O / LCD segment |
| 腳位 9 | RP7/RB7 — Remappable I/O / LCD segment |
| 腳位 10 | RP6/RB6 — Remappable I/O / LCD segment |
| 腳位 11 | RP5/RB5 — Remappable I/O / LCD segment |
| 腳位 12 | RP4/RB4 — Remappable I/O / LCD segment |
| 腳位 13 | RP3/RB3 — Remappable I/O / LCD segment |
| 腳位 14 | RP2/RB2 — Remappable I/O / LCD segment |
| 腳位 15 | RP1/RB1 — Remappable I/O / LCD segment |
| 腳位 16 | RP0/RB0 — Remappable I/O / LCD segment / PGED1 |
| 腳位 17 | VDD — Positive supply (2.0 V to 3.6 V) |
| 腳位 18 | VSS — Ground reference |
| 腳位 19 | OSC1/CLKI — Crystal oscillator input / external clock |
| 腳位 20 | OSC2/CLKO — Crystal oscillator output |
| 腳位 21 | RC1 — I/O port C bit 1 |
| 腳位 22 | RC2 — I/O port C bit 2 |
| 腳位 23 | RC3 — I/O port C bit 3 |
| 腳位 24 | RC4 — I/O port C bit 4 |
| 腳位 25 | VDD — Positive supply |
| 腳位 26 | VSS — Ground reference |
| 腳位 27 | RD1 — I/O port D bit 1 |
| 腳位 28 | RD2 — I/O port D bit 2 |
| 腳位 29 | RD3 — I/O port D bit 3 |
| 腳位 30 | RD4 — I/O port D bit 4 |
| 腳位 31 | RD5 — I/O port D bit 5 |
| 腳位 32 | RD6 — I/O port D bit 6 |
| 腳位 33 | RD7 — I/O port D bit 7 |
| 腳位 34 | RE0 — I/O port E bit 0 |
| 腳位 35 | RE1 — I/O port E bit 1 |
| 腳位 36 | RE2 — I/O port E bit 2 |
| 腳位 37 | RE3 — I/O port E bit 3 |
| 腳位 38 | RE4 — I/O port E bit 4 |
| 腳位 39 | RE5 — I/O port E bit 5 |
| 腳位 40 | RE6 — I/O port E bit 6 |
| 腳位 41 | RE7 — I/O port E bit 7 |
| 腳位 42 | RF0 — I/O port F bit 0 |
| 腳位 43 | RF1 — I/O port F bit 1 |
| 腳位 44 | RF2 — I/O port F bit 2 |
| 腳位 45 | RF3 — I/O port F bit 3 |
| 腳位 46 | RF4 — I/O port F bit 4 |
| 腳位 47 | RF5 — I/O port F bit 5 |
| 腳位 48 | RF6 — I/O port F bit 6 |
| 腳位 49 | RF7 — I/O port F bit 7 |
| 腳位 50 | RG0 — I/O port G bit 0 |
| 腳位 51 | RG1 — I/O port G bit 1 |
| 腳位 52 | RG2 — I/O port G bit 2 |
| 腳位 53 | RG3 — I/O port G bit 3 |
| 腳位 54 | MCLR — Master clear (reset, active-low) |
| 腳位 55 | RA0 — I/O port A bit 0 |
| 腳位 56 | RA1 — I/O port A bit 1 |
| 腳位 57 | RA2 — I/O port A bit 2 |
| 腳位 58 | RA3 — I/O port A bit 3 |
| 腳位 59 | RA4 — I/O port A bit 4 |
| 腳位 60 | RA5 — I/O port A bit 5 |
| 腳位 61 | RA6 — I/O port A bit 6 |
| 腳位 62 | RA7 — I/O port A bit 7 |
| 腳位 63 | RA9 — I/O port A bit 9 |
| 腳位 64 | RA10 — I/O port A bit 10 |
典型應用
PIC24FJ256GA406-I/MR 適用於 6 應用s: Battery-Powered Utility Meter with LCD Display, Secure IoT Sensor Node with Authenticated Firmware, Medical Infusion Pump and Patient Monitor HMI, Industrial Weighing Scale with Calibration Security, Thermostat and HVAC Control Panel, Portable Consumer Health Monitor.
Battery-Powered Utility Meter with LCD Display
The PIC24FJ256GA406-I/MR is well-suited for battery-powered electricity, water, or gas meters that display consumption on a segmented LCD. Its integrated segmented LCD controller supports up to 64 segments without external driver ICs, reducing BOM cost. The eXtreme Low Power (XLP) technology delivers nanoampere sleep currents, enabling 10+ year operation on a single lithium cell. The integrated crypto engine and code-guard security prevent meter tampering and protect calibration firmware. The 256 KB Flash stores application code, calibration tables, and rolling consumption logs, while 16 KB RAM buffers display refresh and communication frames.
推薦
Secure IoT Sensor Node with Authenticated Firmware
For IoT sensor nodes requiring authenticated firmware updates, the PIC24FJ256GA406-I/MR provides a hardware crypto engine supporting AES, DES, and SHA, combined with code-guard security that prevents unauthorized Flash readback. The dual-partition Flash allows OTA firmware updates where one partition executes while the other is reprogrammed, eliminating downtime during deployment. The XLP architecture keeps sleep current below 1 microamp, extending battery life in remote sensor deployments. The 53 GPIO pins and multiple serial peripherals (UART, SPI, I2C) accommodate sensors for temperature, humidity, motion, and air quality in a single device.
推薦
Medical Infusion Pump and Patient Monitor HMI
The PIC24FJ256GA406-I/MR fits medical infusion pumps and patient monitor human-machine interfaces that combine a segmented LCD with secure firmware. Its 12-bit ADC at 500 ksps accurately reads sensor inputs such as flow rate, pressure, and temperature, while the hardware crypto engine protects patient data and prevents unauthorized drug-delivery parameter changes. The 256 KB Flash accommodates graphical menus, drug libraries, and event logs required for medical device certification, and the wide -40 °C to +85 °C operating range supports clinical environments. The integrated segmented LCD removes the need for an external display controller, simplifying FDA documentation.
推薦
Industrial Weighing Scale with Calibration Security
Industrial weighing scales demand secure calibration data and clear LCD readouts. The PIC24FJ256GA406-I/MR's hardware crypto engine protects calibration constants from tampering, while its code-guard security prevents unauthorized firmware modification. The integrated 12-bit ADC digitizes load cell signals with 0.01% resolution, and the segmented LCD controller drives weight, unit, and status displays without external drivers. The wide 2.0-3.6 V supply range accommodates battery or USB-powered installations, and the -40 °C to +85 °C range supports factory floor and outdoor weighing applications.
推薦
Thermostat and HVAC Control Panel
The PIC24FJ256GA406-I/MR is ideal for wall-mounted thermostats and HVAC control panels that combine temperature sensing, schedule storage, and segmented LCD display. Its XLP architecture supports multi-year battery operation by maintaining RTC and schedule data in deep sleep, while the segmented LCD controller drives the temperature, mode, and status display. The integrated crypto engine protects manufacturer brand and configuration settings from cloning, and the 256 KB Flash stores weekly schedules, user preferences, and adaptive-control algorithms. Multiple UART/SPI/I2C interfaces connect to temperature sensors, humidity sensors, and Wi-Fi modules for smart thermostat designs.
推薦
Portable Consumer Health Monitor
For portable consumer health monitors such as blood pressure cuffs, pulse oximeters, and glucose meters, the PIC24FJ256GA406-I/MR offers the integration, security, and display capability needed in compact battery-powered products. The 12-bit ADC captures pulse, SpO2, or blood-glucose sensor data, while the segmented LCD controller displays readings without external drivers. The hardware crypto engine protects personal health information and prevents counterfeit sensor calibration. XLP deep-sleep modes extend battery life across months of standby, and 256 KB Flash stores firmware, calibration tables, and measurement history.
推薦
推薦產品摘要
工程參考資料，適用於 PIC24FJ256GA406-I/MR — 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 | PIC24FJ256GA406-I/PT | PIC24FJ256GA406T-I/MR | PIC24FJ256GB406-I/MR | PIC24FJ128GB406-I/MR |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-pin QFN (9x9) | 64-pin TQFP (different footprint) | 64-pin QFN (9x9) - same | 64-pin QFN (9x9) - same | 64-pin QFN (9x9) - same |
| Flash Memory | 256 KB | 256 KB | 256 KB | 256 KB | 128 KB (-50%) |
| RAM | 16 KB | 16 KB | 16 KB | 32 KB (+100%) | 32 KB (+100%) |
| CPU Speed | 32 MHz (16 MIPS) | 32 MHz (16 MIPS) | 32 MHz (16 MIPS) | 32 MHz (16 MIPS) | 32 MHz (16 MIPS) |
| USB 2.0 FS | No | No | No | Yes | Yes |
| Crypto Engine | Yes (AES/DES/SHA) | Yes | Yes | Yes | Yes |
| Segmented LCD | Yes (up to 64 segments) | Yes | Yes | Yes | Yes |
| Supply Voltage | 2.0 V to 3.6 V | 2.0 V to 3.6 V | 2.0 V to 3.6 V | 2.0 V to 3.6 V | 2.0 V to 3.6 V |
| Operating Temperature | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C |
主要差異化特點
- Integrated hardware crypto engine with code-guard security (對比PIC24FJ128GA006-I/MR)
- Dual-partition Flash for live firmware update (對比PIC24FJ256DA106-I/PT)
- XLP nanoampere sleep modes (對比PIC24EP64MC206-I/PT)
設計說明
The 64-pin QFN package has an exposed thermal pad on the underside that must be soldered to a sufficiently large PCB copper pour (recommended at least 25 mm² connected to the ground plane) for thermal dissipation and ground reference. Use 0.1 mm (4 mil) thermal vias in a 1.2 mm pitch grid under the pad to conduct heat to internal ground planes. Decouple each VDD/VSS pair with a 100 nF ceramic capacitor placed within 3 mm of the supply pin.
Estimate: at 32 MHz / 3.3 V active, the PIC24FJ256GA406-I/MR draws approximately 15-20 mA depending on peripheral use; in deep sleep with RTC running, current drops below 1 µA. For battery-life estimation, account for the active duty cycle, ADC sampling current (~2 mA when active), and any external peripheral current. Use Sleep mode (CPU off, peripherals off) for lowest quiescent current, and Idle mode (CPU off, peripherals running) for wake-on-event designs.
Route the ICSP/ICD pins (PGEDx/PGECx) away from high-frequency switching traces and keep them accessible for in-circuit programming. Place the 32.768 kHz crystal close to the SOSCO/SOSCI pins with short traces and a guard ring to ground to minimize RTC drift. If the segmented LCD is used, route segment and common lines with care to avoid crosstalk; keep them on the same layer as the QFN device, and use the ground plane as a shield.
Do not exceed the absolute maximum VDD of 4.0 V; even brief over-voltage events can damage the part. The MCLR pin must have a pull-up resistor (typically 10 kΩ) for normal run mode, and the ICSP/ICD programming interface requires proper isolation from application circuitry to avoid contention during debug. When migrating code from PIC24FJ64/128 to PIC24FJ256, verify vector table offsets and remappable peripheral assignments because the larger Flash map differs.
合規資訊
RoHS and REACH compliant per Microchip product page. Industrial -40 °C to +85 °C temperature grade; not AEC-Q100 qualified for automotive. Halogen-free per Microchip environmental compliance documentation.
