PIC24FJ256GA110-I/PF - 256KB Flash 16-bit MCU 100-TQFP | Microchip
MPN: PIC24FJ256GA110-I/PF ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.2 | $8.20 |
| 10 | $7.65 | $76.50 |
| 100 | $6.95 | $695.00 |
| 500 | $6.3 | $3,150.00 |
| 1,000 | $5.7 | $5,700.00 |
PIC24FJ256GA110-I/PF Overview
A microcontroller (MCU) is an integrated circuit that combines a CPU, memory, and programmable peripherals on a single silicon die. The PIC24F family sits in the 16-bit MCU segment of Microchip's product hierarchy: PIC24F -> 16-bit MCU -> microcontroller -> embedded processor -> semiconductor. It bridges 8-bit PIC MCUs and 32-bit PIC32 parts, delivering higher performance than 8-bit parts while costing less than DSP-class silicon, which is why it is widely used in mid-range general-purpose designs.
Key differentiating features include the Peripheral Pin Select (PPS) mechanism, which lets most digital peripherals be remapped to alternative physical pins at runtime. NanoWatt XLP eXtreme Low Power technology delivers standby current below 100 nA, enabling battery-powered deployments. The integrated 8 MHz internal oscillator with a 4x PLL option removes the need for an external crystal in many designs. Five 16-bit timers and eight 16-bit capture inputs simplify motor control, sensor sampling, and signal generation.
The architecture implements a five-stage instruction pipeline with deterministic interrupt response, 24-bit wide instruction words, and a hardware multiply/divide unit that accelerates 16-bit signal processing. A Real-Time Clock and Calendar (RTCC) module with on-chip 32 kHz oscillator support enables accurate timekeeping without external components, while the Parallel Master Port (PMP) and Enhanced Parallel Master Port allow glueless interface to external memory or graphics controllers.
Typical applications include industrial control panels, home automation gateways, low-power sensor hubs, USB device and host bridges, and graphical user interfaces. The wide operating voltage (2.0 V to 3.6 V) and rich communication peripherals make it equally suited to battery-powered IoT edges and mains-powered equipment. For designs migrating from 8-bit PIC18 parts, the PIC24FJ256GA110 offers a software-compatible upgrade path with substantially higher MIPS.
When designing with this part, place decoupling capacitors within 2 mm of every VDD/VSS pair and route the 32.768 kHz crystal traces as short and symmetric as possible. The PPS remapping feature should be locked early in firmware bring-up to avoid late-stage PCB re-spins; once committed, PPS configuration cannot be changed in-circuit without a reset.
This page synthesizes distributor pricing, drop-in 100-TQFP alternatives, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for PIC24FJ256GA110-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 PIC24FJ256GA110-I/PF (same form factor and footprint) — differing in Core Architecture, ADC, Operating Temperature, Program Memory (Flash), Timers.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC24FJ256GA110-I/PT
✅ Drop-In✓ In Stock
$5.61 / Unit
View Datasheet →PIC24FJ256GA110-E/PF
✅ Drop-In📋 Reference alternative (not in catalog)
PIC24FJ192GB110-I/PF
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC24FJ192GA110-I/PF
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC24FJ128GA110-I/PF
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC24FJ256GA110-I/PF Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC24F 16-bit Modified Harvard |
| CPU Speed | 32 MHz (16 MIPS) |
| Program Memory (Flash) | 256 KB (85.5K x 24) |
| RAM | 16 KB |
| I/O Pins | 85 |
| Operating Voltage | 2.0 V to 3.6 V |
| I2C Peripherals | 3 |
| SPI Peripherals | 3 |
| UART Peripherals | 4 |
| Timers | 23 independent (5x 16-bit + 8x 16-bit capture) |
| Internal Oscillator | 8 MHz with 4x PLL and multiple divide options |
| Hardware Multiplier | 17-bit x 17-bit single-cycle |
| Hardware Divider | 16-bit |
| Peripheral Pin Select (PPS) | Yes |
| RTCC | Yes, with 32 kHz oscillator input |
| NanoWatt XLP Standby Current | < 100 nA |
| Parallel Master Port (PMP) | Enhanced PMP present |
| Package | 100-pin TQFP (14x14 mm) |
| Mounting Type | Surface Mount |
| Operating Temperature (I grade) | -40 C to +85 C |
| RoHS Status | Compliant |
PIC24FJ256GA110-I/PF 100-pin tqfp (14x14 mm) Pin Configuration Guide
Pin configuration for PIC24FJ256GA110-I/PF (100-pin tqfp (14x14 mm) package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for PIC24FJ256GA110-I/PF.
Refer to the datasheet for full pin configuration.
Typical Applications
PIC24FJ256GA110-I/PF is suitable for 6 applications: Industrial Control Panels, Home Automation Gateways, Low-Power Sensor Hubs, USB Device and Host Bridges, Graphical User Interfaces (HMI), Automotive Body and Comfort Modules.
Industrial Control Panels
The PIC24FJ256GA110-I/PF drives industrial control panels where 85 I/O pins, four UART channels, and 23 timers are needed for keypad scanning, multi-bus sensor aggregation, and motor drive signals. The 256 KB flash comfortably stores full Modbus RTU master plus graphical HMI bitmaps, while the 16 KB RAM buffers scan tables and event logs. NanoWatt XLP <100 nA standby current keeps battery-backed panels alive across long power outages without deep-discharge damage to the backup cell.
Recommended
Home Automation Gateways
The PIC24FJ256GA110-I/PF serves as the protocol bridge inside home automation gateways, with three UART channels handling Zigbee, Z-Wave, and Wi-Fi module links simultaneously. The Peripheral Pin Select feature lets the same silicon drive different daughter-card pinouts without PCB rework. 256 KB flash hosts full TLS stacks and OTA bootloader, while the RTCC module maintains accurate time-of-day across power events. Low standby current keeps wall-wart deployments under 0.5 W idle.
Recommended
Low-Power Sensor Hubs
The PIC24FJ256GA110-I/PF is ideal for battery-powered sensor hubs combining multiple I2C sensors, an SPI display, and a UART uplink. With three I2C and three SPI channels, the MCU aggregates temperature, humidity, pressure, and IMU streams concurrently without bus contention. The <100 nA deep-sleep current extends coin-cell life beyond five years in typical 1-minute wake duty cycles. 16 KB RAM buffers measurement bursts between radio transmissions, preventing data loss during cellular outages.
Recommended
USB Device and Host Bridges
For USB device, host, and OTG bridges the PIC24FJ256GB110 variant is preferred, but the PIC24FJ256GA110-I/PF pairs well as the application MCU alongside a dedicated USB interface IC like the MCP2210. The 32 MHz CPU handles HID, CDC, and vendor-class protocol stacks at full USB FS speed, while 256 KB flash supports composite-device descriptors and multi-language string tables. Enhanced Parallel Master Port allows glueless interface to external graphics memory when bridging to displays.
Recommended
Graphical User Interfaces (HMI)
The PIC24FJ256GA110-I/PF drives graphical user interfaces via its Enhanced Parallel Master Port (PMP), connecting to TFT controllers and external frame buffers with zero glue logic. 256 KB flash stores multi-language fonts, bitmap icons, and screen templates, while 16 KB RAM holds the active frame layer. 85 I/O pins accommodate touch-screen scanning, RGB interface, and backlight PWM without multiplexing. NanoWatt XLP keeps idle screens at <100 nA, suiting battery-powered HMI remotes.
Recommended
Automotive Body and Comfort Modules
The PIC24FJ256GA110-I/PF, when ordered in its E/PF extended-grade variant, fits non-safety automotive body and comfort modules such as seat controllers, ambient lighting, and HVAC blend actuators. Wide 2.0-3.6 V operation tolerates cranking transients on 12 V vehicle buses after pre-regulation. Four UARTs aggregate LIN-translated sensors from multiple body domains, and 23 timers handle PWM-driven LED matrices and motor commutation. AEC-Q100 qualification is NOT claimed for this grade - confirm with automotive spec for safety-relevant modules.
Recommended
Recommended Products Summary
Engineering reference data for PIC24FJ256GA110-I/PF — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC24FJ256GA110-I/PT | PIC24FJ256GA110-E/PF | PIC24FJ192GB110-I/PF | PIC24FJ192GA110-I/PF | PIC24FJ128GA110-I/PF |
|---|---|---|---|---|---|---|
| Package | 100-pin TQFP (14x14 mm) | 100-pin TQFP (14x14 mm) - identical | 100-pin TQFP (14x14 mm) - identical | 100-pin TQFP (14x14 mm) - identical | 100-pin TQFP (14x14 mm) - identical | 100-pin TQFP (14x14 mm) - identical |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 256 KB | 256 KB | 256 KB | 192 KB | 192 KB | 128 KB |
| RAM | 16 KB | 16 KB | 16 KB | 16 KB | 16 KB | 8 KB |
| 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 |
| USB 2.0 | No (use PIC24FJ256GB110 variant) | No | No | Yes (OTG) | No | No |
| Temperature Grade | Industrial -40 C to +85 C | Industrial -40 C to +85 C | Extended -40 C to +125 C | Industrial -40 C to +85 C | Industrial -40 C to +85 C | Industrial -40 C to +85 C |
| Packaging Form | Tray | Tape and Reel | Tray | Tray | Tray | Tray |
Key Differentiators
- Higher flash density within the same 100-TQFP package (vs PIC24FJ128GA110-I/PF)
- Industrial temperature grade option available (vs PIC24FJ256GA110-E/PF)
- Integrated USB OTG via the GB variant on same pinout (vs PIC24FJ192GB110-I/PF)
- Tray vs tape and reel packaging for the same silicon (vs PIC24FJ256GA110-I/PT)
Design Notes
Place a 0.1 uF decoupling capacitor within 2 mm of every VDD/VSS pin pair, with a bulk 10 uF tantalum or ceramic close to the package. According to the Microchip PIC24FJ256GA110 family datasheet power-supply section, the device draws switching transients up to 50 mA during flash programming that local decoupling must absorb. For NanoWatt XLP sleep modes, ensure no leakage paths exist on I/O pins by configuring unused pins as outputs driving low.
Route the 32.768 kHz crystal traces as short and symmetric as possible, with a ground guard ring, and place the load capacitors within 2 mm of the SOSCO/SOSCI pins. According to Microchip oscillator design guidance, stray capacitance above 5 pF on these traces degrades RTCC accuracy below 20 ppm. Keep high-speed digital signals at least 3 mm away from the crystal traces to avoid coupling. The 100-pin TQFP requires 4-layer PCB with continuous ground plane for thermal dissipation and EMI control.
Lock the Peripheral Pin Select (PPS) configuration early in firmware bring-up. According to Microchip PPS documentation, the PPS mapping registers are write-once per reset cycle - changing them mid-runtime requires a device reset. Design the schematic to keep PPS-mapped peripherals on dedicated pins, not shared with fixed-function peripherals. Trace impedance for high-speed SPI buses should be 50 ohm single-ended with length matching under 25 mm across data and clock lines.
Do not enable the JTAG or trace ports unless debugging - leaving them active increases standby current by tens of microamps. According to Microchip errata, the I2C modules can lock up if a slave stretches SCL beyond the master timeout; use the I2C bus-reset sequence to recover. Flash programming voltages must be stable - brown-out during erase can corrupt the configuration word and brick the device until a high-voltage ICP recovery.
Compliance Information
RoHS compliant per Microchip product page. I/PF suffix denotes industrial temperature grade (-40 to +85 C); AEC-Q100 is NOT claimed for this grade - refer to PIC24FJ256GA110-E/PF for extended temperature or contact Microchip for AEC-Q100 automotive-grade PIC24F variants.
