PIC24FJ256GB110-I/PF - 16-bit MCU 256KB Flash USB OTG TQFP-100
MPN: PIC24FJ256GB110-I/PF ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.95 | $8.95 |
| 10 | $8.05 | $80.50 |
| 100 | $7.16 | $716.00 |
| 500 | $6.45 | $3,225.00 |
| 1,000 | $5.73 | $5,730.00 |
PIC24FJ256GB110-I/PF Overview
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.
Drop-in alternatives for PIC24FJ256GB110-I/PF — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with PIC24FJ256GB110-I/PF (same form factor and footprint) — differing in Timers, Package, Operating Temperature, ADC, Core Architecture.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC24FJ256GA110-I/PF
✅ Drop-In✓ In Stock
$5.7 / Unit
View Datasheet →PIC24FJ128GB110-I/PF
✅ Drop-In✓ In Stock
$4.05 / Unit
View Datasheet →PIC24FJ256GB110T-I/PF
✅ Drop-In✓ In Stock
$7.39 / Unit
View Datasheet →PIC24FJ192GB110-I/PF
✅ Drop-In📋 Reference alternative (not in catalog)
PIC24FJ128GB110-I/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.78 / Unit
View Datasheet →PIC24FJ256GB110-I/PF Maximum Ratings & Electrical Characteristics
| 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) |
| Operating Temperature | -40C to +85C (industrial grade, 'I' suffix) |
| Package | 100-pin TQFP (14x14 mm), 'PF' suffix |
| Mounting Type | Surface Mount (SMD/SMT) |
| RoHS Status | Lead-free / Compliant |
PIC24FJ256GB110-I/PF Pin Configuration
| Pin 1 | RG15 — I/O port RG15 |
| Pin 2 | VDD — Positive supply voltage |
| Pin 3 | RP5 — Remappable peripheral input 5 |
| Pin 4 | RP4 — Remappable peripheral input 4 |
| Pin 5 | RP3 — Remappable peripheral input 3 |
| Pin 6 | RP2 — Remappable peripheral input 2 |
| Pin 7 | RP1 — Remappable peripheral input 1 |
| Pin 8 | RP0 — Remappable peripheral input 0 |
| Pin 9 | VSS — Ground reference |
| Pin 10 | OSC1 — Crystal oscillator input / external clock input |
| Pin 11 | OSC2 — Crystal oscillator output |
| Pin 12 | SOSC1 — Secondary oscillator input for RTCC |
| Pin 13 | SOSC2 — Secondary oscillator output |
| Pin 14 | VCAP — Internal voltage regulator output (bypass with 10 uF cap) |
| Pin 15 | PGEC1 — ICSP clock 1 / ICD clock |
| Pin 16 | PGED1 — ICSP data 1 / ICD data |
| Pin 17 | PGEC2 — ICSP clock 2 (alternate) |
| Pin 18 | PGED2 — ICSP data 2 (alternate) |
| Pin 19 | RA0 — I/O port RA0 / analog AN0 |
| Pin 20 | RA1 — I/O port RA1 / analog AN1 |
| Pin 21 | RA2 — I/O port RA2 / analog AN2 |
| Pin 22 | RA3 — I/O port RA3 / analog AN3 |
| Pin 23 | RA4 — I/O port RA4 |
| Pin 24 | RA5 — I/O port RA5 |
| Pin 25 | RA6 — I/O port RA6 |
| Pin 26 | RA7 — I/O port RA7 |
| Pin 27 | RA9 — I/O port RA9 |
| Pin 28 | RA10 — I/O port RA10 |
| Pin 29 | AVDD — Analog positive supply |
| Pin 30 | AVSS — Analog ground |
| Pin 31 | RB0 — I/O port RB0 / analog AN4 |
| Pin 32 | RB1 — I/O port RB1 / analog AN5 |
| Pin 33 | RB2 — I/O port RB2 / analog AN6 |
| Pin 34 | RB3 — I/O port RB3 / analog AN7 |
| Pin 35 | RB4 — I/O port RB4 / analog AN8 |
| Pin 36 | RB5 — I/O port RB5 / analog AN9 |
| Pin 37 | RB6 — I/O port RB6 |
| Pin 38 | RB7 — I/O port RB7 |
| Pin 39 | RB8 — I/O port RB8 |
| Pin 40 | RB9 — I/O port RB9 |
| Pin 41 | RB10 — I/O port RB10 |
| Pin 42 | RB11 — I/O port RB11 |
| Pin 43 | RB12 — I/O port RB12 |
| Pin 44 | RB13 — I/O port RB13 |
| Pin 45 | RB14 — I/O port RB14 |
| Pin 46 | RB15 — I/O port RB15 |
| Pin 47 | RC1 — I/O port RC1 / analog AN10 |
| Pin 48 | RC2 — I/O port RC2 / analog AN11 |
| Pin 49 | RC3 — I/O port RC3 / analog AN12 |
| Pin 50 | RC4 — I/O port RC4 / analog AN13 |
| Pin 51 | RD0 — I/O port RD0 |
| Pin 52 | RD1 — I/O port RD1 |
| Pin 53 | RD2 — I/O port RD2 |
| Pin 54 | RD3 — I/O port RD3 |
| Pin 55 | RD4 — I/O port RD4 |
| Pin 56 | RD5 — I/O port RD5 |
| Pin 57 | RD6 — I/O port RD6 |
| Pin 58 | RD7 — I/O port RD7 |
| Pin 59 | VDD — Positive supply voltage |
| Pin 60 | VSS — Ground reference |
| Pin 61 | RC12 — I/O port RC12 |
| Pin 62 | RC13 — I/O port RC13 |
| Pin 63 | RC14 — I/O port RC14 |
| Pin 64 | RC15 — I/O port RC15 |
| Pin 65 | RD8 — I/O port RD8 |
| Pin 66 | RD9 — I/O port RD9 |
| Pin 67 | RD10 — I/O port RD10 |
| Pin 68 | RD11 — I/O port RD11 |
| Pin 69 | RD12 — I/O port RD12 |
| Pin 70 | RD13 — I/O port RD13 |
| Pin 71 | RD14 — I/O port RD14 |
| Pin 72 | RD15 — I/O port RD15 |
| Pin 73 | RF0 — I/O port RF0 |
| Pin 74 | RF1 — I/O port RF1 |
| Pin 75 | RG0 — I/O port RG0 |
| Pin 76 | RG1 — I/O port RG1 |
| Pin 77 | RG2 — I/O port RG2 |
| Pin 78 | RG3 — I/O port RG3 |
| Pin 79 | RE0 — I/O port RE0 |
| Pin 80 | RE1 — I/O port RE1 |
| Pin 81 | RE2 — I/O port RE2 |
| Pin 82 | RE3 — I/O port RE3 |
| Pin 83 | RE4 — I/O port RE4 |
| Pin 84 | RE5 — I/O port RE5 |
| Pin 85 | RE6 — I/O port RE6 |
| Pin 86 | RE7 — I/O port RE7 |
| Pin 87 | RF2 — I/O port RF2 |
| Pin 88 | RF3 — I/O port RF3 |
| Pin 89 | RF4 — I/O port RF4 |
| Pin 90 | RF5 — I/O port RF5 |
| Pin 91 | RF6 — I/O port RF6 |
| Pin 92 | RF7 — I/O port RF7 |
| Pin 93 | RF8 — I/O port RF8 |
| Pin 94 | D+ — USB D+ data line (integrated transceiver) |
| Pin 95 | D- — USB D- data line (integrated transceiver) |
| Pin 96 | VBUS — USB VBUS detect (5V tolerant) |
| Pin 97 | RG6 — I/O port RG6 |
| Pin 98 | RG7 — I/O port RG7 |
| Pin 99 | RG8 — I/O port RG8 |
| Pin 100 | RG9 — I/O port RG9 |
Typical Applications
PIC24FJ256GB110-I/PF is suitable for 6 applications: 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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
Recommended Products Summary
Engineering reference data for PIC24FJ256GB110-I/PF — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | 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) |
Key Differentiators
- 256 KB Flash / 16 KB SRAM with integrated USB OTG in TQFP-100 (vs PIC24FJ128GB110-I/PF)
- Integrated USB OTG eliminates external bridge IC BOM (vs PIC24FJ256GA110-I/PF)
- 100-pin TQFP-100 in 'PF' (14x14 mm) outline vs smaller 'PT' variants (vs PIC24FJ128GB110-I/PT)
Design Notes
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.
Compliance Information
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.
