PIC24FJ256GB110-I/PF - 16-bit MCU 256KB Flash USB OTG TQFP-100
MPN： PIC24FJ256GB110-I/PF ✓ 啟用中PIC24FJ256GB110-I/PF 概覽
An MCU (microcontroller unit) is a single-chip computer integrating a CPU core, program memory (Flash), data memory (RAM), and a rich set of peripherals (ADC, timers, communication interfaces, I/O). The PIC24F family uses a 16-bit modified Harvard RISC architecture that targets low-power, mixed-signal embedded applications requiring more computational headroom than 8-bit parts but without the cost of a DSP. Within the broader taxonomy, PIC24F MCUs sit between PIC16/PIC18 8-bit controllers and dsPIC33/PIC32 32-bit controllers in Microchip's portfolio.
Key features include 85 I/O pins, a 10-bit ADC with up to 16 channels, four UART modules, three SPI ports, three I2C ports, and five 16-bit timers. The integrated USB OTG peripheral enables dual-role (host/device) operation without an external PHY, while the on-chip RTCC and deep-sleep modes achieve <100 nA standby current for energy-harvesting and always-on applications. Hardware crypto accelerators and a 16-channel DMA controller reduce CPU overhead.
The PIC24FJ256GB110 is built on a low-power CMOS process with nanoWatt technology, integrating multiple power management modes that drop quiescent current dramatically when peripherals are gated off. The USB OTG stack, combined with ample SRAM, makes the part attractive for buffering data streams and implementing composite USB devices without external memory.
Typical applications include USB peripherals, embedded data loggers, industrial sensor hubs, portable medical devices, and human-interface boards. Its pin count and peripheral mix also suit HMI panels, GPS modules, and small-form-factor IoT gateways requiring on-device USB connectivity.
When designing with this MCU, allocate decoupling capacitors close to each VDD/VSS pair and follow Microchip's recommended 33 ohm series resistors on USB DP/DM lines for OTG compliance. Use Microchip's MPLAB X IDE with the XC16 compiler and the MLA USB stack for fastest time-to-prototype.
This page synthesizes distributor pricing, drop-in alternative MPNs, and practical design notes curated from Microchip datasheets and reference designs, providing information not consolidated on a single distributor product page.
直接替換替代品，適用於 PIC24FJ256GB110-I/PF — 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： PIC24FJ256GB110-I/PF （相同外形與佔位） — 差異在於 Timers, Package, Operating Temperature, ADC, Core Architecture.
PIC24FJ256GA110-I/PF
✅ 直接替換聯絡詢價
查看資料表 →PIC24FJ128GB110-I/PF
✅ 直接替換聯絡詢價
查看資料表 →PIC24FJ256GB110T-I/PF
✅ 直接替換聯絡詢價
查看資料表 →PIC24FJ192GB110-I/PF
✅ 直接替換📋 參考替代品（不在目錄中）
PIC24FJ128GB110-I/PT
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →PIC24FJ256GB110-I/PF 最大額定值與電氣特性
| Core Architecture | PIC 16-bit (modified Harvard RISC) |
| Family | PIC24FJ |
| Program Memory (Flash) | 256 KB (85.5K x 24 words) |
| Data Memory (SRAM) | 16 KB |
| Maximum CPU Speed | 32 MHz (16 MIPS) |
| Operating Voltage Range | 2.0 V to 3.6 V |
| I/O Pins | 85 |
| ADC | 10-bit, up to 16 channels |
| UART Modules | 4 |
| SPI Modules | 3 |
| I2C Modules | 3 |
| Timers | 5 x 16-bit (23 independent time bases) |
| USB | USB 2.0 Full-Speed OTG (integrated transceiver) |
| DMA Channels | 16 |
| Standby Current | <100 nA (deep sleep, RTCC on) |
| 工作溫度 | -40C to +85C (industrial grade, 'I' suffix) |
| 封裝 | 100-pin TQFP (14x14 mm), 'PF' suffix |
| 安裝類型 | Surface Mount (SMD/SMT) |
| RoHS 狀態 | Lead-free / Compliant |
PIC24FJ256GB110-I/PF 腳位配置
| 腳位 1 | RG15 — I/O port RG15 |
| 腳位 2 | VDD — Positive supply voltage |
| 腳位 3 | RP5 — Remappable peripheral input 5 |
| 腳位 4 | RP4 — Remappable peripheral input 4 |
| 腳位 5 | RP3 — Remappable peripheral input 3 |
| 腳位 6 | RP2 — Remappable peripheral input 2 |
| 腳位 7 | RP1 — Remappable peripheral input 1 |
| 腳位 8 | RP0 — Remappable peripheral input 0 |
| 腳位 9 | VSS — Ground reference |
| 腳位 10 | OSC1 — Crystal oscillator input / external clock input |
| 腳位 11 | OSC2 — Crystal oscillator output |
| 腳位 12 | SOSC1 — Secondary oscillator input for RTCC |
| 腳位 13 | SOSC2 — Secondary oscillator output |
| 腳位 14 | VCAP — Internal voltage regulator output (bypass with 10 uF cap) |
| 腳位 15 | PGEC1 — ICSP clock 1 / ICD clock |
| 腳位 16 | PGED1 — ICSP data 1 / ICD data |
| 腳位 17 | PGEC2 — ICSP clock 2 (alternate) |
| 腳位 18 | PGED2 — ICSP data 2 (alternate) |
| 腳位 19 | RA0 — I/O port RA0 / analog AN0 |
| 腳位 20 | RA1 — I/O port RA1 / analog AN1 |
| 腳位 21 | RA2 — I/O port RA2 / analog AN2 |
| 腳位 22 | RA3 — I/O port RA3 / analog AN3 |
| 腳位 23 | RA4 — I/O port RA4 |
| 腳位 24 | RA5 — I/O port RA5 |
| 腳位 25 | RA6 — I/O port RA6 |
| 腳位 26 | RA7 — I/O port RA7 |
| 腳位 27 | RA9 — I/O port RA9 |
| 腳位 28 | RA10 — I/O port RA10 |
| 腳位 29 | AVDD — Analog positive supply |
| 腳位 30 | AVSS — Analog ground |
| 腳位 31 | RB0 — I/O port RB0 / analog AN4 |
| 腳位 32 | RB1 — I/O port RB1 / analog AN5 |
| 腳位 33 | RB2 — I/O port RB2 / analog AN6 |
| 腳位 34 | RB3 — I/O port RB3 / analog AN7 |
| 腳位 35 | RB4 — I/O port RB4 / analog AN8 |
| 腳位 36 | RB5 — I/O port RB5 / analog AN9 |
| 腳位 37 | RB6 — I/O port RB6 |
| 腳位 38 | RB7 — I/O port RB7 |
| 腳位 39 | RB8 — I/O port RB8 |
| 腳位 40 | RB9 — I/O port RB9 |
| 腳位 41 | RB10 — I/O port RB10 |
| 腳位 42 | RB11 — I/O port RB11 |
| 腳位 43 | RB12 — I/O port RB12 |
| 腳位 44 | RB13 — I/O port RB13 |
| 腳位 45 | RB14 — I/O port RB14 |
| 腳位 46 | RB15 — I/O port RB15 |
| 腳位 47 | RC1 — I/O port RC1 / analog AN10 |
| 腳位 48 | RC2 — I/O port RC2 / analog AN11 |
| 腳位 49 | RC3 — I/O port RC3 / analog AN12 |
| 腳位 50 | RC4 — I/O port RC4 / analog AN13 |
| 腳位 51 | RD0 — I/O port RD0 |
| 腳位 52 | RD1 — I/O port RD1 |
| 腳位 53 | RD2 — I/O port RD2 |
| 腳位 54 | RD3 — I/O port RD3 |
| 腳位 55 | RD4 — I/O port RD4 |
| 腳位 56 | RD5 — I/O port RD5 |
| 腳位 57 | RD6 — I/O port RD6 |
| 腳位 58 | RD7 — I/O port RD7 |
| 腳位 59 | VDD — Positive supply voltage |
| 腳位 60 | VSS — Ground reference |
| 腳位 61 | RC12 — I/O port RC12 |
| 腳位 62 | RC13 — I/O port RC13 |
| 腳位 63 | RC14 — I/O port RC14 |
| 腳位 64 | RC15 — I/O port RC15 |
| 腳位 65 | RD8 — I/O port RD8 |
| 腳位 66 | RD9 — I/O port RD9 |
| 腳位 67 | RD10 — I/O port RD10 |
| 腳位 68 | RD11 — I/O port RD11 |
| 腳位 69 | RD12 — I/O port RD12 |
| 腳位 70 | RD13 — I/O port RD13 |
| 腳位 71 | RD14 — I/O port RD14 |
| 腳位 72 | RD15 — I/O port RD15 |
| 腳位 73 | RF0 — I/O port RF0 |
| 腳位 74 | RF1 — I/O port RF1 |
| 腳位 75 | RG0 — I/O port RG0 |
| 腳位 76 | RG1 — I/O port RG1 |
| 腳位 77 | RG2 — I/O port RG2 |
| 腳位 78 | RG3 — I/O port RG3 |
| 腳位 79 | RE0 — I/O port RE0 |
| 腳位 80 | RE1 — I/O port RE1 |
| 腳位 81 | RE2 — I/O port RE2 |
| 腳位 82 | RE3 — I/O port RE3 |
| 腳位 83 | RE4 — I/O port RE4 |
| 腳位 84 | RE5 — I/O port RE5 |
| 腳位 85 | RE6 — I/O port RE6 |
| 腳位 86 | RE7 — I/O port RE7 |
| 腳位 87 | RF2 — I/O port RF2 |
| 腳位 88 | RF3 — I/O port RF3 |
| 腳位 89 | RF4 — I/O port RF4 |
| 腳位 90 | RF5 — I/O port RF5 |
| 腳位 91 | RF6 — I/O port RF6 |
| 腳位 92 | RF7 — I/O port RF7 |
| 腳位 93 | RF8 — I/O port RF8 |
| 腳位 94 | D+ — USB D+ data line (integrated transceiver) |
| 腳位 95 | D- — USB D- data line (integrated transceiver) |
| 腳位 96 | VBUS — USB VBUS detect (5V tolerant) |
| 腳位 97 | RG6 — I/O port RG6 |
| 腳位 98 | RG7 — I/O port RG7 |
| 腳位 99 | RG8 — I/O port RG8 |
| 腳位 100 | RG9 — I/O port RG9 |
典型應用
PIC24FJ256GB110-I/PF 適用於 6 應用s: USB HID Human Interface Devices, USB CDC Virtual COM Port Bridges, Portable Battery-Powered Data Loggers, Industrial Sensor Hubs with USB Diagnostics, Embedded Human-Machine Interface (HMI) Panels, Portable Medical and Wellness Devices.
USB HID Human Interface Devices
The PIC24FJ256GB110-I/PF's integrated USB 2.0 Full-Speed OTG controller with on-chip transceiver makes it a strong fit for USB HID-class peripherals such as keyboards, mice, custom control surfaces, and gamepads. The 16 KB SRAM comfortably buffers HID report descriptors, while the 256 KB Flash fits the USB HID stack plus application logic in Microchip's MLA library. Compared with adding an external USB interface chip to an 8-bit MCU, the integrated USB OTG reduces BOM cost by $1-2 and PCB area by 50-100 mm^2. The 32 MHz/16 MIPS performance sustains polling rates above 1000 Hz on multi-axis inputs.
推薦
USB CDC Virtual COM Port Bridges
In USB CDC virtual COM port bridges (USB-to-UART converters, debug consoles, factory programming tools), the PIC24FJ256GB110-I/PF shines. The integrated USB transceiver eliminates the need for an external FTDI-style bridge, and the four UART modules let the same firmware serve as a hub or multi-channel gateway. The 16 MIPS core sustains 921600 baud bridging without throughput loss, while 256 KB Flash accommodates USB CDC class driver plus configurable command-line interpreters. Designers also leverage the DMA engine to copy data between USB endpoint RAM and UART buffers without CPU intervention, freeing the core for protocol parsing.
推薦
Portable Battery-Powered Data Loggers
Battery-powered data loggers benefit from the PIC24FJ256GB110-I/PF's nanoWatt deep-sleep modes (under 100 nA with RTCC active) plus 16 KB SRAM for time-stamped sensor buffering. A typical use case samples an external temperature/humidity sensor every 10 seconds, compresses the data, and writes to a USB flash drive via USB OTG host mode. The 32 MHz performance handles on-the-fly delta compression, while deep-sleep extends battery life on 2xAA cells to 6-12 months. Industrial -40C to +85C operation suits outdoor and cold-chain logistics deployments.
推薦
Industrial Sensor Hubs with USB Diagnostics
Industrial sensor hubs combine analog inputs (10-bit ADC, 16 channels), digital I/O (85 pins), and USB diagnostics - exactly the PIC24FJ256GB110-I/PF's strength. The on-chip 10-bit ADC at up to 500 ksps is fast enough for vibration and process-variable monitoring, and the CTMU (Charge Time Measurement Unit) enables capacitive touch and resistive sensing. USB OTG host mode supports firmware updates from a USB stick in the field, cutting truck-roll costs. The wide 2.0-3.6V supply accepts 24V industrial rails via a simple LDO.
推薦
Embedded Human-Machine Interface (HMI) Panels
HMI panels with character or small graphical LCDs, button/keypad input, and USB host capability (for firmware updates or barcode scanners) suit the PIC24FJ256GB110-I/PF. The 256 KB Flash and 16 KB SRAM comfortably hold a small graphical UI library, character tables for multiple languages, and a USB HID host stack. CTMU enables capacitive touch buttons without external touch controllers, while the 85 I/Os drive character LCDs, keypads, status LEDs, and a UART-connected expansion module. Operating at -40C to +85C, the MCU handles industrial cabinet environments.
推薦
Portable Medical and Wellness Devices
Portable medical and wellness devices (handheld pulse oximeters, home spirometers, fitness monitors) leverage the PIC24FJ256GB110-I/PF's low standby current, USB charging interface, and rich peripheral mix. The 10-bit ADC with up to 16 channels digitizes analog front-end signals from oximetry sensors or ECG leads, while the RTCC maintains accurate time-stamping. USB OTG device mode handles charging and data upload to a host PC. The 16 MIPS performance is sufficient for on-device DSP filtering of bio-signals without an external DSP chip.
推薦
推薦產品摘要
工程參考資料，適用於 PIC24FJ256GB110-I/PF — 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 | PIC24FJ256GA110-I/PF | PIC24FJ128GB110-I/PF | PIC24FJ256GB110T-I/PF | PIC24FJ192GB110-I/PF | PIC24FJ128GB110-I/PT |
|---|---|---|---|---|---|---|
| Package | 100-pin TQFP (14x14 mm), 'PF' suffix | 100-pin TQFP (14x14 mm), 'PF' suffix - same | 100-pin TQFP (14x14 mm), 'PF' suffix - same | 100-pin TQFP (14x14 mm), 'PF' suffix - same | 100-pin TQFP (14x14 mm), 'PF' suffix - same | 100-pin TQFP (12x12 mm), 'PT' suffix - footprint code differs |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory (Flash) | 256 KB | 256 KB | 128 KB (-50%) | 256 KB | 192 KB (-25%) | 128 KB (-50%) |
| Data Memory (SRAM) | 16 KB | 16 KB | 8 KB (-50%) | 16 KB | 16 KB | 8 KB (-50%) |
| USB OTG | Yes (integrated transceiver) | No | Yes (integrated transceiver) | Yes (integrated transceiver) | Yes (integrated transceiver) | Yes (integrated transceiver) |
| Maximum 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 |
| Operating 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 | 2.0 V to 3.6 V |
| I/O Pins | 85 | 85 | 85 | 85 | 85 | 85 |
| ADC | 10-bit, up to 16 channels | 10-bit, up to 16 channels | 10-bit, up to 16 channels | 10-bit, up to 16 channels | 10-bit, up to 16 channels | 10-bit, up to 16 channels |
| Temperature Grade | -40C to +85C (industrial) | -40C to +85C (industrial) | -40C to +85C (industrial) | -40C to +85C (industrial) | -40C to +85C (industrial) | -40C to +85C (industrial) |
主要差異化特點
- 256 KB Flash / 16 KB SRAM with integrated USB OTG in TQFP-100 (對比PIC24FJ128GB110-I/PF)
- Integrated USB OTG eliminates external bridge IC BOM (對比PIC24FJ256GA110-I/PF)
- 100-pin TQFP-100 in 'PF' (14x14 mm) outline vs smaller 'PT' variants (對比PIC24FJ128GB110-I/PT)
設計說明
Place a 10 uF low-ESR ceramic bypass capacitor as close as possible to the VCAP pin (pin 14) of the PIC24FJ256GB110-I/PF. This capacitor stabilizes the internal 2.5V core voltage regulator and is mandatory per Microchip datasheet DS39897C - omitting it causes erratic Flash read/write failures and watchdog resets. Add 100 nF decoupling on every VDD/VSS pin pair. Estimated bulk-current draw is up to 40 mA at 32 MHz; use a wide power trace from the LDO to the VDD pins.
Route the USB D+ (pin 94) and D- (pin 95) lines as a 90-ohm differential pair, with traces matched in length to within 2 mm. Place the 27-ohm series termination resistors within 4 mm of the MCU pins per USB 2.0 Full-Speed spec. Keep the D+/D- pair away from oscillator traces and switching power lines, and place a ferrite bead on VBUS (pin 96) if the device is bus-powered. Microchip's USB OTG design checklist in AN1341 should be reviewed before tape-out.
Configure the internal LPRC or SOSC oscillator for the RTCC to keep deep-sleep standby current below 100 nA. When using USB with VBUS detection, set the VBUS pin as an input and enable the internal pull-down to detect cable plug/unplug events. Wake-up from deep sleep via RTCC alarm requires the SOSC crystal (typically 32.768 kHz on pins SOSC1/SOSC2) to be present and stable. Estimated battery life on 2x AA alkaline (2500 mAh) at one wake per minute is 5-8 years depending on active-mode duty cycle.
Avoid using the legacy MPLAB C30 compiler; use MPLAB XC16 to access all PIC24FJ256GB110 errata fixes. Do not program flash above 2.0V VDD or below the temperature grade limit - below -40C the self-programming timings stretch and writes may fail silently. When using USB host mode, the VBUS pin must drive a 100 mA current-limited source capable of switching in 100 ms; use a dedicated load switch rather than GPIO.
合規資訊
Lead-free / RoHS compliant per Microchip product page and DigiKey listing. Not AEC-Q100 qualified - choose PIC24FJ256GB110-E/PF for automotive grade or external automotive-qualified PIC variants. Halogen-free status not explicitly stated in the verified data.
