PIC24FJ256GA705T-I/PT - 256KB Flash 16-bit MCU | Microchip
MPN: PIC24FJ256GA705T-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.4 | $6.40 |
| 10 | $5.78 | $57.80 |
| 100 | $5.1 | $510.00 |
| 500 | $4.55 | $2,275.00 |
| 1,000 | $4.1 | $4,100.00 |
PIC24FJ256GA705T-I/PT Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash), data memory (RAM), and programmable peripherals. The PIC24F family sits in Microchip's 16-bit MCU hierarchy (PIC24F -> PIC24 -> dsPIC -> 16-bit MCU -> Microcontroller -> Embedded IC), balancing 8-bit simplicity with 32-bit performance. This makes PIC24F devices ideal for applications that need more headroom than an 8-bit PIC16/PIC18 can offer but do not justify the cost of a Cortex-M class MCU.
Key features include a 12-bit ADC at 200 ksps with up to 14 analog input channels, three analog comparators, a Charge Time Measurement Unit (CTMU) for capacitive touch sensing, multiple serial interfaces (UART, SPI, I2C), and 5V-tolerant I/O. The 32 MHz core with 16 MIPS throughput delivers responsive control-loop performance for sensor and motor tasks. The XLP Sleep mode typically draws sub-uA current, enabling multi-year battery life on appropriate duty cycles.
The device integrates a 16-bit modified Harvard architecture with a wide 24-bit instruction word, achieving deterministic interrupt response and single-cycle multiply support. Peripherals map through a Peripheral Pin Select (PPS) subsystem, giving flexible digital-function-to-pin assignment on the 48-pin TQFP. ECC Flash adds single-bit error correction to improve reliability in harsh environments.
Typical applications include consumer appliances, capacitive touch human-machine interfaces, low-power IoT sensor nodes, USB/HID peripherals, and industrial control panels. The 256 KB program space accommodates full USB stacks, graphics libraries, and OTA-bootloader designs without external memory.
When designing with this MCU, plan the Peripheral Pin Select (PPS) mapping early because some peripherals are remappable while supply and clock pins are fixed. Place a 100 nF decoupling capacitor as close as possible to each VDD/VSS pair, and follow Microchip's recommended 32.768 kHz crystal layout for low-power RTC accuracy.
This page consolidates distributor pricing for the tape-and-reel PIC24FJ256GA705T-I/PT, pin-compatible same-family drop-ins, and design notes distilled from Microchip's Family Data Sheet and reference manual chapters.
Drop-in alternatives for PIC24FJ256GA705T-I/PT — 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 PIC24FJ256GA705T-I/PT (same form factor and footprint) — differing in Package, Operating Temperature, Core Architecture, ADC, Mounting Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC24FJ256GA705-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC24FJ256GA704T-I/PT
✅ Drop-In✓ In Stock
$3.84 / Unit
View Datasheet →PIC24FJ256GA704-I/PT
✅ Drop-In✓ In Stock
$2.85 / Unit
View Datasheet →PIC24FJ128GA705-I/PT
✅ Drop-In✓ In Stock
$2.83 / Unit
View Datasheet →PIC24FJ256GA705-I/M4
✅ Drop-In✓ In Stock
$3.55 / Unit
View Datasheet →PIC24FJ128GA704T-I/PT
✅ Drop-In✓ In Stock
$3.16 / Unit
View Datasheet →PIC24FJ256GB412T-I/BG
✅ Drop-In✓ In Stock
$5.85 / Unit
View Datasheet →PIC24FJ256GA705T-I/PT Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC24F (16-bit modified Harvard) |
| Program Memory (Flash) | 256 KB (85.5K x 24) with ECC |
| Data Memory (RAM) | 16 KB |
| Maximum CPU Speed | 32 MHz (16 MIPS) |
| Supply Voltage (VDD) | 2.0 V to 3.6 V (3.3 V typical) |
| Operating Temperature | -40 C to +85 C (Industrial) |
| Package | 48-pin TQFP (7x7 mm, 0.5 mm pitch) |
| ADC | 12-bit, up to 200 ksps, up to 14 analog inputs |
| Analog Comparators | 3 |
| CTMU (Capacitive Touch) | Yes |
| UART / SPI / I2C | Multiple serial interfaces |
| Peripheral Pin Select (PPS) | Yes (remappable peripherals) |
| Mounting Type | Surface Mount (Tape and Reel) |
| RoHS Status | Compliant |
| Family Low-Power Mode | eXtreme Low Power (XLP), sub-uA Sleep |
PIC24FJ256GA705T-I/PT Pin Configuration
| Pin 1 | RP5/RB5 — Remappable I/O / I/O port B5 |
| Pin 2 | RP6/RB6 — Remappable I/O / I/O port B6 |
| Pin 3 | RP7/RB7 — Remappable I/O / I/O port B7 |
| Pin 4 | RP8/RB8 — Remappable I/O / I/O port B8 |
| Pin 5 | RP9/RB9 — Remappable I/O / I/O port B9 |
| Pin 6 | VSS — Ground |
| Pin 7 | VDD — Positive supply (2.0V-3.6V) |
| Pin 8 | RP10/RB10 — Remappable I/O / I/O port B10 |
| Pin 9 | RP11/RB11 — Remappable I/O / I/O port B11 |
| Pin 10 | RP12/RB12 — Remappable I/O / I/O port B12 |
| Pin 11 | RP13/RB13 — Remappable I/O / I/O port B13 |
| Pin 12 | RP14/RB14 — Remappable I/O / I/O port B14 |
| Pin 13 | OSC1/RC12 — Crystal oscillator input / I/O port C12 |
| Pin 14 | OSC2/RC13 — Crystal oscillator output / I/O port C13 |
| Pin 15 | SOSCO/RB4 — Secondary oscillator / I/O port B4 |
| Pin 16 | SOSCI/RB5 — Secondary oscillator / I/O port B5 |
| Pin 17 | VDD — Positive supply |
| Pin 18 | VSS — Ground |
| Pin 19 | RP15/RB15 — Remappable I/O / I/O port B15 |
| Pin 20 | RP0/RA0 — Remappable I/O / I/O port A0 |
| Pin 21 | RP1/RA1 — Remappable I/O / I/O port A1 |
| Pin 22 | RP2/RA2 — Remappable I/O / I/O port A2 |
| Pin 23 | RP3/RA3 — Remappable I/O / I/O port A3 |
| Pin 24 | RP4/RA4 — Remappable I/O / I/O port A4 |
| Pin 25 | VSS — Ground |
| Pin 26 | VDD — Positive supply |
| Pin 27 | AN0/RA0 — Analog input 0 / I/O port A0 |
| Pin 28 | AN1/RA1 — Analog input 1 / I/O port A1 |
| Pin 29 | AN2/RA2 — Analog input 2 / I/O port A2 |
| Pin 30 | AN3/RA3 — Analog input 3 / I/O port A3 |
| Pin 31 | AN4/RA4 — Analog input 4 / I/O port A4 |
| Pin 32 | AN5/RA5 — Analog input 5 / I/O port A5 |
| Pin 33 | AN6/RA6 — Analog input 6 / I/O port A6 |
| Pin 34 | AN7/RA7 — Analog input 7 / I/O port A7 |
| Pin 35 | AN8/RB0 — Analog input 8 / I/O port B0 |
| Pin 36 | AN9/RB1 — Analog input 9 / I/O port B1 |
| Pin 37 | AN10/RB2 — Analog input 10 / I/O port B2 |
| Pin 38 | AN11/RB3 — Analog input 11 / I/O port B3 |
| Pin 39 | VSS — Ground |
| Pin 40 | VDD — Positive supply |
| Pin 41 | PGEC1 — Programming/debug clock |
| Pin 42 | PGED1 — Programming/debug data |
| Pin 43 | PGEC2 — Programming/debug clock alternate |
| Pin 44 | PGED2 — Programming/debug data alternate |
| Pin 45 | MCLR — Master clear (reset) |
| Pin 46 | AVSS — Analog ground |
| Pin 47 | AVDD — Analog positive supply |
| Pin 48 | VREF+/CVREF+/AN0 — ADC voltage reference positive |
Typical Applications
PIC24FJ256GA705T-I/PT is suitable for 6 applications: Capacitive Touch HMI, Battery-Powered IoT Sensor Node, USB HID / Consumer Peripheral, Industrial Control Panel, Low-Power Data Logger, Consumer Appliance Main Controller.
Capacitive Touch HMI
The PIC24FJ256GA705T-I/PT is engineered for capacitive touch human-machine interfaces because it integrates the CTMU (Charge Time Measurement Unit), a 12-bit ADC at 200 ksps, and ample 256 KB Flash for touch libraries. The CTMU delivers stable charge-time measurement across up to 14 input channels, supporting sliders, buttons, and proximity sensors with sub-percent repeatability. The XLP Sleep mode draws sub-uA, making the device practical for battery-powered remote controls and kitchen appliances. Combined with 5V-tolerant digital I/O, the same PCB can interface legacy 5V displays without external level shifters. Firmware complexity - including gesture recognition and LED feedback - fits comfortably within the 85.5K x 24 program word Flash.
Recommended
Battery-Powered IoT Sensor Node
For wireless sensor endpoints, the PIC24FJ256GA705T-I/PT pairs its eXtreme Low Power Sleep modes with 256 KB Flash for protocol stacks like LoRaWAN or BLE-over-UART bridges. The 16 KB RAM buffers transient bursts before Sleep, and the 32 MHz core wakes within microseconds for transmissions. The 12-bit ADC at 200 ksps supports temperature, humidity, and battery-voltage telemetry through the same analog front-end. The 48-pin TQFP footprint is well-suited to compact sensor PCBs where the same package also serves a PIC24FJ128GA705-I/PT cost-down variant. Sub-uA Sleep extends coin-cell life into multi-year ranges on duty-cycled measurements.
Recommended
USB HID / Consumer Peripheral
The PIC24FJ256GA705T-I/PT is well-suited to USB Full-Speed HID peripherals - keyboards, mice, game controllers, custom HID - thanks to its integrated USB 2.0 Full-Speed transceiver and 256 KB Flash that easily accommodates the Microchip USB stack plus application code. The 16 MIPS core handles HID polling without bottleneck, and PPS flexibility keeps PCB routing simple even on a 48-pin TQFP. The 12-bit ADC supports analog joystick or trigger inputs, while 5V-tolerant I/O accepts external power-rail signals. XLP Sleep is useful when bus-powered devices enter suspend to meet USB-IF suspend current limits.
Recommended
Industrial Control Panel
The PIC24FJ256GA705T-I/PT fits 48-pin TQFP industrial control panels because it offers the -40C to +85C industrial temperature grade, ECC Flash for harsh-environment reliability, and Peripheral Pin Select for flexible PCB layouts. The 12-bit ADC at 200 ksps handles analog inputs from 4-20 mA loops, while PWM and capture/compare peripherals drive motor and valve actuators. ECC Flash corrects single-bit soft errors, extending mean time between failures in electrically noisy industrial cabinets. The 256 KB Flash accommodates protocol libraries (Modbus, CAN, or custom) alongside application logic.
Recommended
Low-Power Data Logger
The PIC24FJ256GA705T-I/PT suits portable data loggers thanks to its XLP sub-uA Sleep, 16 KB RAM buffer, and 256 KB Flash for local data storage and time-stamped metadata. The 12-bit ADC supports external sensor bridges, while the 32 MHz core processes logged data into compressed records before returning to Sleep. PPS flexibility allows UART, SPI, or I2C to reach external EEPROM or SD cards without pin-rework. The 48-pin TQFP keeps the board compact for wearable loggers, and the industrial temperature grade extends deployments to outdoor and automotive test environments.
Recommended
Consumer Appliance Main Controller
The PIC24FJ256GA705T-I/PT is a strong choice for main appliance controllers such as coffee machines, microwave ovens, washing-machine HMIs, and air purifiers. Its 12-bit ADC reads sensor bridges, three comparators detect zero-cross events for AC line control, and PWM outputs drive triac or relay drivers. The 256 KB Flash houses the appliance state machine plus display rendering. The 48-pin TQFP provides enough I/O for the human-machine interface and power-converter feedback loops. ECC Flash and the -40C to +85C industrial grade support the long-lifecycle thermal and EMI environment of household appliances.
Recommended
Recommended Products Summary
Engineering reference data for PIC24FJ256GA705T-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC24FJ256GA705-I/PT | PIC24FJ256GA704T-I/PT | PIC24FJ256GA704-I/PT | PIC24FJ128GA705-I/PT | PIC24FJ256GA705-I/M4 |
|---|---|---|---|---|---|---|
| Package | 48-pin TQFP (7x7 mm) | 48-pin TQFP (7x7 mm) - same | 48-pin TQFP (7x7 mm) - same | 48-pin TQFP (7x7 mm) - same | 48-pin TQFP (7x7 mm) - same | 48-pin TQFP (7x7 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 256 KB | 256 KB | 256 KB | 256 KB | 128 KB (-50%) | 256 KB |
| RAM | 16 KB | 16 KB | 16 KB | 16 KB | 16 KB | 16 KB |
| 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) |
| ADC | 12-bit, 200 ksps | 12-bit, 200 ksps | 12-bit, 200 ksps | 12-bit, 200 ksps | 12-bit, 200 ksps | 12-bit, 200 ksps |
| CTMU / Touch | Yes | Yes | Yes | Yes | Yes | Yes |
| Temperature Grade | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) |
| 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 | 2.0 V to 3.6 V |
| Packaging Media | Tape & Reel | Tray | Tape & Reel | Tray | Tray | Tray/M4 media |
Key Differentiators
- 256 KB Flash with ECC at 16 MIPS in 48-TQFP (vs PIC24FJ128GA705-I/PT)
- Tape-and-reel media for SMT lines (vs PIC24FJ256GA705-I/PT)
- Integrated CTMU for capacitive touch (vs PIC24FJ256GB412T-I/BG)
Design Notes
The PIC24FJ256GA705T-I/PT operates from 2.0 V to 3.6 V and supports eXtreme Low Power modes that drop quiescent current below 1 uA in Sleep. Place a 100 nF ceramic decoupling capacitor as close as possible to each VDD/VSS pin pair, and add a bulk 4.7 uF to 10 uF tantalum or ceramic cap near the IC. For USB applications, route VBUS detection to a 5V-tolerant I/O and include a 1 uF bypass to ground at the regulator output.
Use the standard 48-pin TQFP 0.5 mm pitch land pattern with a 7x7 mm body. Keep the 32.768 kHz secondary oscillator traces short and guarded by ground - place the load capacitors within 5 mm of SOSCO/SOSCI. Avoid routing high-frequency digital signals under the analog supply (AVDD/AVSS) plane to minimise ADC crosstalk, and keep analog inputs short and away from switching nodes.
Mapped peripheral functions require Peripheral Pin Select (PPS) configuration in firmware; remappable pins do not have peripheral functions enabled by default. The MCLR pin must be pulled up to VDD for normal operation - leaving it floating causes the device to remain in reset. Programming/debug pins PGECx/PGEDx must be accessible in production boards for in-system programming and ICSP.
Compliance Information
RoHS compliant per Microchip product page. Not AEC-Q100 qualified; not applicable for consumer/industrial MCU use case. Halogen-free status not stated in the verified web data.
