PIC24FJ256GB406T-I/MR - 256KB Flash 16-bit MCU w/ USB OTG & LCD | Microchip
料号： PIC24FJ256GB406T-I/MR ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $7.45 | $7.45 |
| 10 | $6.95 | $69.50 |
| 100 | $6.32 | $632.00 |
| 500 | $5.85 | $2,925.00 |
| 1,000 | $5.4 | $5,400.00 |
PIC24FJ256GB406T-I/MR 概述
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash), working memory (RAM), and a rich peripheral set on one silicon die. Within the broader taxonomy, MCUs sit under microcontrollers -> embedded processors -> semiconductors, and the PIC24F sub-family is the 16-bit mid-range line of Microchip's PIC architecture. The PIC24FJ256GB406T-I/MR adds hardware crypto acceleration, making it a 'secure MCU' variant of the PIC24F family.
Key differentiating features include 256KB self-programmable Flash organized as 85.5K x 24 words, 16KB SRAM, integrated segmented LCD driver (up to 120 segments), USB 2.0 Full-Speed OTG with on-chip transceiver, and a hardware crypto engine for AES/SHA. The 64-QFN (MR) package exposes 52 I/O pins and provides a thermal-resistance path that suits industrial-grade designs.
Architecturally, the device uses a Harvard-modified 16-bit core with hardware Multiply/Divide, a 32MHz internal FRC oscillator with PLL, and an eXtreme Low Power (XLP) sleep mode that drops current below 100nA in deep sleep. This combination delivers 16 MIPS performance while preserving battery life on coin-cell or energy-harvesting power sources.
Typical applications include secure token-based medical devices, USB-connected industrial sensors with LCD human-machine interfaces, point-of-sale terminals, smart meters with segmented LCD readouts, and portable patient monitors. The integrated crypto engine accelerates firmware authentication in connected embedded products.
When designing with this MCU, ensure that VDD decoupling uses 100nF ceramic capacitors placed within 5mm of each power pin and that the segmented LCD bias network uses the recommended charge-pump capacitor values. Designers should also evaluate the RTCC retention current budget against their standby time target.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, structured for procurement and embedded engineering workflows.
直接替换替代料： PIC24FJ256GB406T-I/MR ——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： PIC24FJ256GB406T-I/MR （相同外形与封装尺寸） ——差异在于 Package, ADC, Operating Temperature, USB, Program Memory (Flash).
快速对比工具——选择替代料号进行并排对比：
PIC24FJ256GB406-I/MR
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
PIC24FJ256GA406-I/MR
✅ 直接替换✓ 有现货
$3.79 / 个
查看数据手册 →PIC24FJ256DA106-I/MR
✅ 直接替换✓ 有现货
$6.25 / 个
查看数据手册 →PIC24FJ128GB606-I/MR
✅ 直接替换✓ 有现货
$3.62 / 个
查看数据手册 →PIC24FJ256GB106-I/MR
✅ 直接替换✓ 有现货
$4.78 / 个
查看数据手册 →PIC24FJ256GA606-I/MR
✅ 直接替换📋 参考替代料（不在目录中）
PIC24FJ256GB406T-I/MR 最大额定值与电气特性
| Core Architecture | PIC24F 16-bit |
| Maximum CPU Speed | 32 MHz (16 MIPS) |
| Program Flash | 256 KB (85.5K x 24) |
| Data RAM | 16 KB |
| Supply Voltage (VDD) | 2.0 V to 3.6 V |
| 工作温度 | -40 C to +85 C (Industrial) |
| I/O Pins | 52 |
| 封装 | 64-QFN (9x9 mm) with EP |
| ADC | 10-bit, 500 ksps, up to 16 inputs |
| Analog Comparators | 3 |
| USB | USB 2.0 Full-Speed OTG with on-chip PHY |
| LCD Driver | Segmented LCD, up to 120 segments |
| Crypto Engine | Hardware AES/SHA |
| Timers | 5x 16-bit / 2x 32-bit |
| Communication | 4x UART, 3x SPI, 3x I2C |
| Low-Power Mode | XLP - <100 nA in deep sleep |
| 安装类型 | Surface Mount |
| RoHS 状态 | Compliant |
PIC24FJ256GB406T-I/MR 引脚配置
| 引脚 1 | RA0 — PORTA I/O / analog / LCD segment |
| 引脚 2 | RA1 — PORTA I/O / analog / LCD segment |
| 引脚 3 | RA2 — PORTA I/O / analog / LCD segment |
| 引脚 4 | RA3 — PORTA I/O / analog / LCD segment |
| 引脚 5 | RA4 — PORTA I/O / analog / LCD segment |
| 引脚 6 | RA5 — PORTA I/O / analog / LCD segment |
| 引脚 7 | RA6 — PORTA I/O / analog / LCD segment |
| 引脚 8 | RA7 — PORTA I/O / analog / LCD segment |
| 引脚 9 | RA8 — PORTA I/O / analog / LCD segment |
| 引脚 10 | RA9 — PORTA I/O / analog / LCD segment |
| 引脚 11 | RA10 — PORTA I/O / analog / LCD segment |
| 引脚 12 | RA11 — PORTA I/O / analog / LCD segment |
| 引脚 13 | RA12 — PORTA I/O / analog / LCD segment |
| 引脚 14 | RA13 — PORTA I/O / analog / LCD segment |
| 引脚 15 | RA14 — PORTA I/O / analog / LCD segment |
| 引脚 16 | RA15 — PORTA I/O / analog / LCD segment |
| 引脚 17 | VSS — Ground reference |
| 引脚 18 | VDD — Positive supply voltage (2.0V-3.6V) |
| 引脚 19 | RB0 — PORTB I/O / programming |
| 引脚 20 | RB1 — PORTB I/O / programming |
| 引脚 21 | RB2 — PORTB I/O |
| 引脚 22 | RB3 — PORTB I/O |
| 引脚 23 | RB4 — PORTB I/O |
| 引脚 24 | RB5 — PORTB I/O / analog |
| 引脚 25 | RB6 — PORTB I/O / analog |
| 引脚 26 | RB7 — PORTB I/O / analog |
| 引脚 27 | RB8 — PORTB I/O / analog |
| 引脚 28 | RB9 — PORTB I/O / analog |
| 引脚 29 | RB10 — PORTB I/O / analog |
| 引脚 30 | RB11 — PORTB I/O / analog |
| 引脚 31 | RB12 — PORTB I/O / analog |
| 引脚 32 | RB13 — PORTB I/O / analog |
| 引脚 33 | RB14 — PORTB I/O / analog |
| 引脚 34 | RB15 — PORTB I/O / analog |
| 引脚 35 | VSS — Ground reference |
| 引脚 36 | VDD — Positive supply voltage |
| 引脚 37 | RC0 — PORTC I/O / analog |
| 引脚 38 | RC1 — PORTC I/O / analog |
| 引脚 39 | RC2 — PORTC I/O / analog |
| 引脚 40 | RC3 — PORTC I/O / analog |
| 引脚 41 | RC4 — PORTC I/O / analog |
| 引脚 42 | RC5 — PORTC I/O / analog |
| 引脚 43 | RC6 — PORTC I/O / analog |
| 引脚 44 | RC7 — PORTC I/O / analog |
| 引脚 45 | RC8 — PORTC I/O / analog |
| 引脚 46 | RC9 — PORTC I/O / analog |
| 引脚 47 | RC10 — PORTC I/O / analog |
| 引脚 48 | RC11 — PORTC I/O / analog |
| 引脚 49 | RC12 — PORTC I/O / analog |
| 引脚 50 | RC13 — PORTC I/O / analog |
| 引脚 51 | RC14 — PORTC I/O / analog |
| 引脚 52 | RC15 — PORTC I/O / analog |
| 引脚 53 | RD0 — PORTD I/O |
| 引脚 54 | RD1 — PORTD I/O |
| 引脚 55 | RD2 — PORTD I/O |
| 引脚 56 | RD3 — PORTD I/O |
| 引脚 57 | RD4 — PORTD I/O |
| 引脚 58 | RD5 — PORTD I/O |
| 引脚 59 | RD6 — PORTD I/O |
| 引脚 60 | RD7 — PORTD I/O |
| 引脚 61 | OSC1 — Crystal oscillator input / CLKIN |
| 引脚 62 | OSC2 — Crystal oscillator output / CLKOUT |
| 引脚 63 | MCLR — Master Clear (reset) input |
| 引脚 64 | EP — Exposed thermal pad - connect to VSS |
典型应用
PIC24FJ256GB406T-I/MR 适用于 6 应用s: Secure USB Medical Token, Industrial Sensor with Segmented LCD HMI, Smart Meter with LCD Readout, Portable Point-of-Sale Terminal, Connected IoT Edge Node, Battery-Backed Industrial Data Logger.
Secure USB Medical Token
The PIC24FJ256GB406T-I/MR is a strong fit for medical USB tokens because its hardware crypto engine accelerates AES/SHA authentication while the integrated USB 2.0 Full-Speed OTG transceiver eliminates the need for an external PHY. At 32MHz / 16 MIPS it handles the full HID plus custom USB stack with cycle budget left for crypto. The 256KB Flash comfortably fits medical-grade USB stacks, IEC 62304-class B firmware, and an updatable bootloader; the 16KB RAM supports USB endpoint buffers plus RTOS data structures. XLP Sleep current below 100nA preserves coin-cell life when the device is idle, while the 64-QFN package keeps the board under 18x18 mm for wearable form factors. Use it with a TPS7A2010 LDO and an MCP73831 Li-ion charger to complete a single-cell USB-C reference design.
推荐
Industrial Sensor with Segmented LCD HMI
The PIC24FJ256GB406T-I/MR excels in industrial sensor HMIs that need a segmented LCD readout and USB connectivity for configuration. Its on-chip segmented LCD driver supports up to 120 segments in 1/2, 1/3 or 1/4 bias with charge-pump bias generation, and the LCD peripheral runs while the CPU is in Sleep - essential for multi-year battery life on field sensors. Four UARTs, three SPI and three I2C ports allow simultaneous connection to multiple sensor front-ends (pressure, temperature, flow). The 256KB Flash fits a Thread-safe RTOS plus Modbus RTU/TCP firmware; 16KB RAM supports TCP/IP lite stacks. The 64-QFN package exposes 52 I/O pins - enough for keypad, alarm output, and dual RS-485 transceivers. Industrial -40C to +85C rating suits outdoor enclosures.
推荐
Smart Meter with LCD Readout
The PIC24FJ256GB406T-I/MR is a strong match for electricity, water or gas meters that need a long-life segmented LCD and authenticated firmware updates. Its hardware crypto engine verifies signed firmware images before Flash self-programming, preventing tampering in fielded metering assets. The on-chip segmented LCD driver (up to 120 segments) eliminates an external LCD driver chip, reducing BOM cost by 1 USD on a typical design. At 32MHz the device runs meter calibration routines plus RTOS in the 16KB RAM, while the XLP subsystem keeps Sleep current under 100nA so a single D-size lithium cell can power the meter for 10+ years. The 64-QFN footprint exposes enough I/O for two isolated metrology front-ends plus an optical port.
推荐
Portable Point-of-Sale Terminal
The PIC24FJ256GB406T-I/MR suits portable POS terminals where USB OTG, secure firmware and battery life are essential. Its integrated USB 2.0 OTG controller handles PIN pad connections and host-side card reader protocols at 12 Mbps, while the hardware crypto engine accelerates EMV-style PIN block encryption and TLS handshake pre-shared-key derivation. The 256KB Flash holds the EMV kernel, USB stack and secure bootloader; the 16KB RAM is large enough for two TCP sockets plus USB endpoint buffers. XLP Sleep keeps idle current low, extending shift life on the internal battery. The 64-QFN 9x9 mm package fits inside a handheld enclosure and exposes 52 I/O pins for keypad, printer and mag-stripe head.
推荐
Connected IoT Edge Node
The PIC24FJ256GB406T-I/MR is an excellent fit for IoT edge nodes that need authenticated firmware, USB diagnostics and a low-power segmented LCD or 7-segment display. Its 32MHz / 16 MIPS core runs a wireless stack (via SPI) plus an IoT protocol like MQTT-SN, while the hardware crypto engine verifies TLS certificates and signed firmware. XLP Sleep current below 100nA lets a coin-cell-powered node report every few seconds for years. USB Full-Speed OTG provides local configuration and firmware update without needing an additional IC. The 64-QFN package exposes 52 I/O pins for sensor front-ends, status LEDs and a UART debug port. The 256KB Flash and 16KB RAM fit a small RTOS plus TCP/IP stack with margin.
推荐
Battery-Backed Industrial Data Logger
The PIC24FJ256GB406T-I/MR is well suited to industrial data loggers that must capture sensor readings during line power loss and store them to non-volatile memory. Its XLP technology holds Sleep current below 100nA so a backup supercapacitor or coin cell can sustain logging through brown-outs. The 256KB Flash and 16KB RAM support on-device buffering of thousands of timestamped sensor samples plus a small file system, while the on-chip segmented LCD driver displays last readings without waking the host. Hardware crypto protects exported log files. With 52 I/O pins, the 64-QFN package can interface multiple analog sensors (10-bit ADC), SPI flash (for non-volatile storage) and an I2C RTC. Industrial -40C to +85C rating covers factory floor conditions.
推荐
推荐产品汇总
工程参考数据： PIC24FJ256GB406T-I/MR ——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 | PIC24FJ256GB406-I/MR | PIC24FJ256GA406-I/MR | PIC24FJ256DA106-I/MR | PIC24FJ128GB606-I/MR | PIC24FJ256GB106-I/MR | PIC24FJ256GA606-I/MR |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-QFN (9x9) | 64-QFN (9x9) - same | 64-QFN (9x9) - same | 64-QFN (9x9) - same | 64-QFN (9x9) - same | 64-QFN (9x9) - same | 64-QFN (9x9) - same |
| Flash | 256 KB | 256 KB | 256 KB | 256 KB | 128 KB (-50%) | 256 KB | 256 KB |
| RAM | 16 KB | 16 KB | 16 KB | 16 KB | 8 KB (-50%) | 16 KB | 16 KB |
| USB | USB 2.0 OTG (Host/Device) | USB 2.0 OTG | USB 2.0 OTG | USB 2.0 Device only (no OTG) | USB 2.0 OTG | USB 2.0 OTG | USB 2.0 Device only |
| Hardware Crypto Engine | Yes (AES/SHA) | Yes (AES/SHA) | No | No | Yes (AES/SHA) | No | No |
| Segmented LCD Driver | Yes (up to 120 segments) | Yes | Yes | No | Yes | No | Yes |
| Max CPU Speed | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS |
| 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 | -40 C to +85 C | -40 C to +85 C |
关键差异点
- Hardware crypto engine accelerates AES/SHA （对比 PIC24FJ256GA406-I/MR)
- Higher-density Flash/RAM than 64-QFN family members （对比 PIC24FJ128GB606-I/MR)
- Integrated segmented LCD driver （对比 PIC24FJ256DA106-I/MR)
- USB OTG with on-chip transceiver （对比 PIC24FJ256GA606-I/MR)
设计说明
Estimated: VDD 3.3V with average CPU draw of 15mA at 32MHz in active mode; place a 100nF 0402C X7R ceramic capacitor within 5mm of every VDD/VDDCORE pin (typically 4 pins on the 64-QFN package) to keep ripple below 50mVpp during ADC conversions. Add a bulk 4.7uF tantalum or ceramic capacitor near the IC for transient load steps when the USB transceiver switches to active mode.
The 64-QFN package has an exposed thermal pad (EP, pin 64) that MUST be soldered to the PCB ground plane with at least 8 thermal vias (0.3mm drill, 0.6mm pad) to meet the package thermal resistance (theta-JA) target of approximately 28 C/W. Without the EP soldered, junction temperature can exceed 125C at modest ambient loads, leading to thermal shutdown under continuous USB or LCD backlight use.
Do not skip the MCLR pull-up resistor on pin 63; a 10k pull-up to VDD is required for the Master Clear reset circuit. Floating MCLR can cause spurious resets and unreliable USB enumeration. For In-Circuit Serial Programming (ICSP) keep the PGECx/PGEDx pairs accessible on test pads - programming them under the LCD charge pump caps creates signal integrity issues that block firmware updates.
Route the USB D+/D- differential pair (typically on RB0/RB1 or dedicated pins) as a 90-ohm differential microstrip over a continuous ground plane, with no splits and no via stubs. Keep the pair under 50mm total length to meet USB 2.0 Full-Speed signal integrity requirements. Place the 27pF USB series termination resistors within 4mm of the MCU pins. Add ESD protection (USBLC6-2SC6 or equivalent) near the USB connector.
The segmented LCD driver can inject switching noise into adjacent analog inputs; place a ground guard ring around sensitive analog traces and use the AVDD/AVSS pair (if available) for separate analog supply filtering. Add a 10nF ceramic capacitor at each LCD segment pin if the LCD cable length exceeds 50mm to dampen ringing during charge-pump transitions.
合规信息
RoHS compliant per Microchip product page. Industrial-grade (-40C to +85C), not AEC-Q100 qualified. Lead-free reflow profile per JEDEC J-STD-020. Halogen-free per IEC 61249-2-21.
