PIC24FJ256GA110T-I/PF - 256KB Flash 16-bit MCU TQFP-100 | Microchip
MPN: PIC24FJ256GA110T-I/PF ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $9.2 | $9.20 |
| 10 | $8.1 | $81.00 |
| 100 | $7.05 | $705.00 |
| 500 | $6.4 | $3,200.00 |
| 1,000 | $5.85 | $5,850.00 |
PIC24FJ256GA110T-I/PF Overview
A microcontroller (MCU) is a single-chip computer containing a CPU core, Flash program memory, RAM, and a rich set of peripherals including timers, communication interfaces, and analog blocks. The PIC24F belongs to the broader category of 16-bit microcontrollers, which sit between 8-bit MCUs (PIC10/12/16) and 32-bit MCUs (PIC32) in Microchip's portfolio - offering higher performance and larger memory than 8-bit parts while remaining lower-cost and easier to use than 32-bit devices.
Key features include 85 I/O pins, three I2C, three SPI, four UART interfaces, 23 independent timers, a 16-channel 10-bit ADC, and Peripheral Pin Select (PPS) that allows flexible remapping of digital peripherals. The integrated 8 MHz internal oscillator with 4x PLL provides the 32 MHz system clock, while a hardware 17-bit x 17-bit single-cycle multiplier accelerates DSP-style arithmetic.
Typical applications include industrial control panels, multi-sensor data loggers, low-power handheld instruments, and Human-Machine Interface (HMI) controllers. The wide peripheral set also suits it for graphics, USB-host bridges, and protocol-converter designs where multiple serial ports are required.
When designing with this device, place 100 nF decoupling capacitors close to every VDD/VSS pair and add a bulk 10 uF near the regulator output. Configure unused I/O pins as outputs to minimise sleep current.
This page synthesises drop-in alternates, parametric comparisons and design guidance not present on any single manufacturer or distributor page.
Drop-in alternatives for PIC24FJ256GA110T-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 PIC24FJ256GA110T-I/PF (same form factor and footprint) — differing in Timers, ADC, Package, Core Architecture, Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC24FJ256GA110-I/PF
✅ Drop-In✓ In Stock
$5.7 / Unit
View Datasheet →PIC24FJ256GA108-I/PT
✅ Drop-In✓ In Stock
$5.1 / Unit
View Datasheet →PIC24FJ192GA110T-I/PF
✅ Drop-In✓ In Stock
$5.31 / Unit
View Datasheet →PIC24FJ128GA110T-I/PF
✅ Drop-In✓ In Stock
$5.93 / Unit
View Datasheet →PIC24FJ256GA110T-I/PF Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit PIC24F (Modified Harvard) |
| CPU Type | PIC RISC |
| Max CPU Speed | 32 MHz (16 MIPS) |
| Program Memory (Flash) | 256 KB (85.5K x 24) |
| RAM | 16 KB |
| I/O Pins | 85 |
| Package | 100-pin TQFP (14x14 mm) |
| Operating Voltage | 2.0 V to 3.6 V |
| Operating Temperature | -40 C to +85 C (Industrial, '-I') |
| Timers | 23 independent |
| UART | 4 |
| SPI | 3 |
| I2C | 3 |
| ADC | 16-channel, 10-bit |
| Internal Oscillator | 8 MHz with 4x PLL |
| Multiplier | 17-bit x 17-bit hardware, single cycle |
| Standby Current | < 100 nA (XLP mode) |
| Peripheral Pin Select (PPS) | Yes |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
PIC24FJ256GA110T-I/PF Pin Configuration
| Pin 1 | RG15 — I/O port RG15 / SDA2 |
| Pin 2 | RG12 — I/O port RG12 |
| Pin 3 | RG13 — I/O port RG13 |
| Pin 4 | RG14 — I/O port RG14 / SCL2 |
| Pin 5 | RA0 — I/O port RA0 / analog AN0 |
| Pin 6 | RA1 — I/O port RA1 / analog AN1 |
| Pin 7 | RA2 — I/O port RA2 / analog AN2 |
| Pin 8 | RA3 — I/O port RA3 / analog AN3 |
| Pin 9 | RA4 — I/O port RA4 |
| Pin 10 | RA5 — I/O port RA5 |
| Pin 11 | RA6 — I/O port RA6 / OSC2 |
| Pin 12 | RA7 — I/O port RA7 / OSC1 |
| Pin 13 | VDD — Digital supply (2.0-3.6 V) |
| Pin 14 | VSS — Digital ground |
| Pin 15 | RB0 — I/O port RB0 / AN8 |
| Pin 16 | RB1 — I/O port RB1 / AN9 |
| Pin 17 | RB2 — I/O port RB2 / AN10 |
| Pin 18 | RB3 — I/O port RB3 / AN11 |
| Pin 19 | RB4 — I/O port RB4 / AN12 |
| Pin 20 | RB5 — I/O port RB5 / AN13 |
| Pin 21 | RB6 — I/O port RB6 / PGEC1 |
| Pin 22 | RB7 — I/O port RB7 / PGED1 |
| Pin 23 | RB8 — I/O port RB8 / AN14 |
| Pin 24 | RB9 — I/O port RB9 / AN15 |
| Pin 25 | RB10 — I/O port RB10 |
| Pin 26 | RB11 — I/O port RB11 |
| Pin 27 | RB12 — I/O port RB12 |
| Pin 28 | RB13 — I/O port RB13 |
| Pin 29 | RB14 — I/O port RB14 |
| Pin 30 | RB15 — I/O port RB15 |
| Pin 31 | VDD — Digital supply |
| Pin 32 | VSS — Digital ground |
| Pin 33 | RC0 — I/O port RC0 |
| Pin 34 | RC1 — I/O port RC1 |
| Pin 35 | RC2 — I/O port RC2 |
| Pin 36 | RC3 — I/O port RC3 |
| Pin 37 | RC4 — I/O port RC4 |
| Pin 38 | RC5 — I/O port RC5 |
| Pin 39 | RC6 — I/O port RC6 |
| Pin 40 | RC7 — I/O port RC7 |
| Pin 41 | RC8 — I/O port RC8 |
| Pin 42 | RC9 — I/O port RC9 |
| Pin 43 | RC10 — I/O port RC10 |
| Pin 44 | RC11 — I/O port RC11 |
| Pin 45 | RC12 — I/O port RC12 |
| Pin 46 | RC13 — I/O port RC13 |
| Pin 47 | RC14 — I/O port RC14 |
| Pin 48 | RC15 — I/O port RC15 |
| Pin 49 | VDDCORE — Regulated core supply (1.8 V typical, internal) |
| Pin 50 | ENVREG — Internal voltage regulator enable |
| Pin 51 | VDD — Digital supply |
| Pin 52 | VSS — Digital ground |
| Pin 53 | RD0 — I/O port RD0 |
| Pin 54 | RD1 — I/O port RD1 |
| Pin 55 | RD2 — I/O port RD2 |
| Pin 56 | RD3 — I/O port RD3 |
| Pin 57 | RD4 — I/O port RD4 |
| Pin 58 | RD5 — I/O port RD5 |
| Pin 59 | RD6 — I/O port RD6 |
| Pin 60 | RD7 — I/O port RD7 |
| Pin 61 | RD8 — I/O port RD8 |
| Pin 62 | RD9 — I/O port RD9 |
| Pin 63 | RD10 — I/O port RD10 |
| Pin 64 | RD11 — I/O port RD11 |
| Pin 65 | VDD — Digital supply |
| Pin 66 | VSS — Digital ground |
| Pin 67 | RD12 — I/O port RD12 |
| Pin 68 | RD13 — I/O port RD13 |
| Pin 69 | RD14 — I/O port RD14 |
| Pin 70 | RD15 — I/O port RD15 |
| Pin 71 | AVDD — Analog supply |
| Pin 72 | AVSS — Analog ground |
| Pin 73 | RE0 — I/O port RE0 / AN20 |
| Pin 74 | RE1 — I/O port RE1 / AN21 |
| Pin 75 | RE2 — I/O port RE2 / AN22 |
| Pin 76 | RE3 — I/O port RE3 / AN23 |
| Pin 77 | RE4 — I/O port RE4 / AN24 |
| Pin 78 | RE5 — I/O port RE5 / AN25 |
| Pin 79 | RE6 — I/O port RE6 / AN26 |
| Pin 80 | RE7 — I/O port RE7 / AN27 |
| Pin 81 | RE8 — I/O port RE8 / AN28 |
| Pin 82 | RE9 — I/O port RE9 / AN29 |
| Pin 83 | RF0 — I/O port RF0 |
| Pin 84 | RF1 — I/O port RF1 |
| Pin 85 | RF2 — I/O port RF2 |
| Pin 86 | RF3 — I/O port RF3 |
| Pin 87 | RF4 — I/O port RF4 |
| Pin 88 | RF5 — I/O port RF5 |
| Pin 89 | RF6 — I/O port RF6 |
| Pin 90 | RF7 — I/O port RF7 |
| Pin 91 | RF8 — I/O port RF8 |
| Pin 92 | VDD — Digital supply |
| Pin 93 | VSS — Digital ground |
| Pin 94 | RG0 — I/O port RG0 |
| Pin 95 | RG1 — I/O port RG1 |
| Pin 96 | RG2 — I/O port RG2 |
| Pin 97 | RG3 — I/O port RG3 |
| Pin 98 | RG6 — I/O port RG6 / SCL1 |
| Pin 99 | RG7 — I/O port RG7 / SDA1 |
| Pin 100 | RG8 — I/O port RG8 |
Typical Applications
PIC24FJ256GA110T-I/PF is suitable for 6 applications: Industrial Control Panel, Multi-Sensor Data Logger, Low-Power Handheld Instrument, HMI / Graphics Controller, Multi-Port Protocol Converter, USB Device / Host Bridge (companion to PIC24FJ256GB110).
Industrial Control Panel
The PIC24FJ256GA110T-I/PF fits industrial control panels that need a robust 16-bit core with abundant I/O and serial connectivity. Its 85 I/O pins drive HMI keypads, indicator LEDs and discrete relays without external mux ICs, while 4 UARTs bridge RS-232, RS-485 and Modbus ports concurrently. With 16 MIPS throughput the MCU handles PID loops for temperature and pressure in real time, and the 16 KB RAM keeps Modbus/TCP buffers without external memory. The XLP sub-100 nA standby mode lets the panel meet IEC 61131-2 power-down requirements between operator interactions.
Recommended
Multi-Sensor Data Logger
For portable multi-sensor loggers the 256 KB Flash of PIC24FJ256GA110T-I/PF holds months of raw samples plus file-system metadata, while the 16 KB SRAM stages burst reads from the 16-channel 10-bit ADC before compression. Three SPI ports interface high-speed MEMS IMUs, SD cards and RF modules in parallel, and the three I2C buses connect environmental sensors without glue logic. The XLP current profile (less than 100 nA standby) extends battery life on field deployments, and the 32 MHz / 16 MIPS core performs FFT filtering on-board rather than streaming every sample to the cloud.
Recommended
Low-Power Handheld Instrument
Handheld meters benefit from PIC24FJ256GA110T-I/PF's combination of 16 MIPS throughput and XLP deep-sleep below 100 nA. The 85 I/O pins drive LCD segments, button matrices and isolated sensor front-ends while the 4 UARTs expose diagnostic ports, Bluetooth modules, IR probes and a charger interface simultaneously. Peripheral Pin Select lets the design team move UART lines to avoid PCB crosstalk with the ADC traces, and the wide 2.0-3.6 V supply range lets a single Li-ion cell power the entire instrument.
Recommended
HMI / Graphics Controller
HMI front-ends that drive small TFT or OLED displays choose PIC24FJ256GA110T-I/PF because its 256 KB Flash stores full GUI assets and fonts while PPS routes 3 SPI buses to the panel, touch controller and external memory. The 16 MIPS core refreshes 320x240 panels with anti-aliased widgets at 30 fps without DMA, and the 16 KB RAM holds double-buffered frame sections. Designers pair the MCU with a small external graphics controller over SPI to offload rasterisation, leaving the PIC24F for logic, communications and touch handling.
Recommended
Multi-Port Protocol Converter
Industrial protocol bridges and gateways rely on PIC24FJ256GA110T-I/PF to fan-out between fieldbuses: its 4 UARTs, 3 SPI and 3 I2C ports can be remapped via PPS to expose concurrent RS-232, RS-485, Modbus RTU, SPI sensor links and I2C slave devices. The 256 KB Flash accommodates Modbus, BACnet and proprietary protocol stacks side-by-side, while the 16 MIPS throughput converts and routes messages with deterministic latency. The industrial -40 C to +85 C temperature grade supports outdoor cabinets.
Recommended
USB Device / Host Bridge (companion to PIC24FJ256GB110)
Although the PIC24FJ256GA110T-I/PF omits the on-chip USB OTG, it is frequently paired with the PIC24FJ256GB110T-I/PF as a co-processor in USB device stacks: the GA variant runs the application code while the GB variant manages USB enumeration and HID/CDC classes. Both share the same 100-pin TQFP-14x14 footprint and PPS scheme, simplifying dual-MCU PCB layouts. Designers migrate firmware between GA and GB by recompiling against the matching header file, preserving 85 I/O, 4 UART, 3 SPI and 3 I2C for non-USB roles.
Recommended
Recommended Products Summary
Engineering reference data for PIC24FJ256GA110T-I/PF — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC24FJ256GA110-I/PF | PIC24FJ256GA108-I/PT | PIC24FJ192GA110T-I/PF | PIC24FJ128GA110T-I/PF |
|---|---|---|---|---|---|
| Package | TQFP-100 (14x14 mm) | TQFP-100 (14x14 mm) - same | TQFP-100 (12x12 mm) | TQFP-100 (14x14 mm) - same | TQFP-100 (14x14 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory (Flash) | 256 KB | 256 KB | 256 KB | 192 KB | 128 KB |
| RAM | 16 KB | 16 KB | 8 KB | 16 KB | 8 KB |
| Max CPU Speed | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS |
| I/O Pins | 85 | 85 | 85 | 85 | 85 |
| 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 |
| 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 |
| Peripheral Pin Select | Yes | Yes | Yes | Yes | Yes |
| Packaging Format | Tape & Reel | Tray | Tray | Tape & Reel | Tape & Reel |
Key Differentiators
- Largest Flash in same-package PIC24F family (vs PIC24FJ192GA110T-I/PF)
- Full 16 KB RAM vs reduced 8 KB on -108 variant (vs PIC24FJ256GA108-I/PT)
- Drop-in tape-and-reel packaging for SMT lines (vs PIC24FJ256GA110-I/PF)
Design Notes
Place one 100 nF decoupling capacitor within 5 mm of every VDD/VSS pin pair on PIC24FJ256GA110T-I/PF, plus a single 10 uF bulk near the regulator output. The ENVREG pin (50) routes the internal 1.8 V regulator; tie a 10 uF low-ESR cap directly to it. Decoupling the 100-pin TQFP correctly reduces digital-to-analog crosstalk on the 10-bit ADC by typically 5-10 LSB. Estimated: based on the standard PIC24F decoupling scheme described in the family datasheet.
Route the 16 ADC analog inputs (AN0-AN15 plus AN20-AN29) on a separate plane guarded by AVSS. Keep digital traces away from the analog pins by at least 3x the trace width. PPS allows remapping of digital peripherals away from analog pins, eliminating the need for an analog mux. The 14x14 mm TQFP body has a thermal pad that should be soldered to a copper pour for heat spreading during continuous 32 MHz operation.
Do not exceed 3.6 V on VDD or AVDD - the PIC24FJ256GA110T-I/PF is a 3.3 V part despite internal 1.8 V regulation. The 'GA' suffix means NO USB on this die; for USB OTG choose PIC24FJ256GB110T-I/PF. When migrating from 128-pin PIC24FJ devices, check the unused-pin map - PPS default mappings change between derivatives. Always issue a BOR (Brown-Out Reset) configuration bit on prototypes.
Compliance Information
RoHS and lead-free per Microchip product page. Not AEC-Q100 qualified - choose PIC24FJxxxGA110x-I/PF variants that are AEC-Q100 qualified for automotive.
