PIC24FJ128GA310T-I/PF - 16-bit 32MHz 128KB Flash MCU | Microchip
MPN: PIC24FJ128GA310T-I/PF ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.18 | $6.18 |
| 10 | $5.71 | $57.10 |
| 100 | $5.23 | $523.00 |
| 250 | $4.84 | $1,210.00 |
| 500 | $4.46 | $2,230.00 |
PIC24FJ128GA310T-I/PF Overview
A 16-bit microcontroller (MCU) is a microprocessor that uses a 16-bit data bus and instruction word, positioning it between 8-bit MCUs (PIC16, AVR) and 32-bit MCUs (ARM Cortex-M). Within Microchip's portfolio the PIC24F family belongs to the broader 16-bit MCU class, which trades off simplicity and lower cost (8-bit) against higher performance and richer peripherals (32-bit). The XLP (eXtreme Low Power) variants add nanoWatt technology with deep sleep currents as low as 340 nA typical, making them a subclass of general-purpose PIC24F MCUs optimized for battery-powered embedded systems.
Key features of the PIC24FJ128GA310T-I/PF include a peripheral pin select (PPS) system for flexible I/O mapping, a 10/12-bit ADC with up to 500 ksps conversion rate, multiple UART/SPI/I2C interfaces, a Parallel Master Port (PMP), a real-time clock and calendar (RTCC) with backup registers, and an LCD controller supporting up to 480 segments. Hardware peripherals also include a charge time measurement unit (CTMU) for capacitive touch sensing, five 16-bit timers, and a 16-bit comparator module.
The device operates from 2.0V to 3.6V and provides nanoWatt XLP low-power modes. Per the Microchip PIC24FJ128GA310 family datasheet (30009996g), deep sleep current is approximately 340 nA typical with RAM retention and 20 nA with full retention off. The integrated LCD controller drives up to 480 segments, reducing the need for an external driver IC in glass-panel human-machine interface designs.
Typical applications include industrial control panels, handheld medical instruments, e-metering, battery-powered sensor hubs, automotive clusters, and any design that requires ultra-low standby power combined with a rich on-chip peripheral set. The combination of PPS, RTCC, CTMU and LCD controller makes it suitable for single-chip HMI nodes.
When designing with this MCU, allocate the analog and digital supply pins (AVDD/AVSS and VDDCORE) with separate decoupling and follow Microchip's recommended PCB layout for the 100-pin TQFP land pattern. The TQFP-100 footprint is shared with most PIC24FJ128GA310 family members, enabling board reuse across Flash/RAM variants.
This page synthesizes distributor pricing (as of 2026-09-29), drop-in same-package alternatives within the PIC24FJ128GA310 family and 100-TQFP footprint, and practical design notes not consolidated in the Microchip datasheet.
Drop-in alternatives for PIC24FJ128GA310T-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 PIC24FJ128GA310T-I/PF (same form factor and footprint) — differing in ADC, Package, Core Architecture, Timers, Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC24FJ128GA310-I/PT
✅ Drop-In✓ In Stock
$4.85 / Unit
View Datasheet →PIC24FJ128GA110T-I/PF
✅ Drop-In✓ In Stock
$5.93 / Unit
View Datasheet →PIC24FJ128DA210T-I/PT
✅ Drop-In✓ In Stock
$7.1 / Unit
View Datasheet →PIC24FJ64GA310T-I/PF
✅ Drop-In✓ In Stock
$5.2 / Unit
View Datasheet →PIC24FJ128DA110T-I/PT
✅ Drop-In✓ In Stock
$4.79 / Unit
View Datasheet →PIC24EP512GU810-I/PF
✅ Drop-In✓ In Stock
$7.36 / Unit
View Datasheet →PIC24FJ128GA310T-I/PF Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC24F 16-bit Modified Harvard RISC |
| Family | PIC24FJ128GA310 (XLP, LCD controller) |
| Program Memory (Flash) | 128 KB (43K x 24 words) |
| Data RAM | 32 KB |
| Maximum CPU Speed | 32 MHz (16 MIPS at 3.3V) |
| Operating Voltage | 2.0 V to 3.6 V |
| Operating Temperature | -40 C to +85 C (Industrial) |
| Package | 100-pin TQFP (14x14 mm) |
| Mounting Type | Surface Mount |
| LCD Controller | Up to 480 segments |
| ADC | 10/12-bit, up to 500 ksps |
| Deep Sleep Current (RAM retention) | 340 nA typical |
| RTCC (Real-Time Clock) | Yes, with backup registers |
| Charge Time Measurement Unit (CTMU) | Yes (capacitive touch support) |
| Peripheral Pin Select (PPS) | Yes (remappable I/O) |
| MSL Level | MSL3 |
| RoHS Status | Compliant |
| Lead-Free | Yes |
| Halogen Free | Yes |
| AEC-Q100 Qualified | No (industrial grade) |
PIC24FJ128GA310T-I/PF 100-pin tqfp (14x14 mm) Pin Configuration Guide
Pin configuration for PIC24FJ128GA310T-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 PIC24FJ128GA310T-I/PF.
Refer to the datasheet for full pin configuration.
Typical Applications
PIC24FJ128GA310T-I/PF is suitable for 6 applications: Industrial Control Panels with LCD HMI, Battery-Powered Sensor Hubs, Handheld Medical Instruments, Electronic Metering (e-Metering), Automotive Instrument Clusters (non-safety), IoT Edge Nodes with Local HMI.
Industrial Control Panels with LCD HMI
The PIC24FJ128GA310T-I/PF's integrated segment LCD controller (up to 480 segments) and 128 KB Flash make it ideal for industrial control panels with character or segment-glass HMIs. The 32 KB RAM accommodates full screen buffers for 4x40 character LCDs or numeric glass panels without external memory. CTMU enables capacitive touch keys alongside the LCD, eliminating dedicated touch controllers. Per the Microchip family datasheet, the device supports 2.0V to 3.6V operation, suitable for industrial 24V-bus-derived 3.3V rails with adequate filtering. Power sequencing between LCD charge pump and MCU rails is simplified through the integrated charge pump.
Recommended
Battery-Powered Sensor Hubs
The PIC24FJ128GA310T-I/PF's nanoWatt XLP technology delivers 340 nA typical deep-sleep current with RAM retention, enabling multi-year coin-cell operation in remote sensor hubs. The 10/12-bit ADC and CTMU support direct sensor interfacing for temperature, humidity, and capacitive moisture measurements, while the RTCC provides accurate time-stamping with calendar alarms. The 32 KB RAM allows buffering of full sensor fusion windows in Doze or Sleep mode before wake-and-transmit cycles. Per the datasheet, peripheral pin select enables flexible I/O mapping for SPI sensors, I2C peripherals, and UART modems on a single 100-TQFP footprint without rework.
Recommended
Handheld Medical Instruments
The PIC24FJ128GA310T-I/PF's low-power operation and segment LCD make it a fit for handheld medical devices like glucose meters, pulse oximeters, and digital thermometers. The 32 KB RAM holds calibration tables and trending history, while the 128 KB Flash accommodates FDA-aligned firmware with diagnostics. CTMU and the 12-bit ADC measure bioelectric signals and resistive/capacitive sensors with high precision. Per Microchip documentation, the -I industrial temperature grade (-40C to +85C) supports typical clinical environments and field use cases. UL/IEC 60601 designs pair the MCU with isolated analog front ends.
Recommended
Electronic Metering (e-Metering)
The PIC24FJ128GA310T-I/PF's segment LCD driver, RTCC, and 12-bit ADC combine for single-chip electronic metering in electricity, gas, and water meters. The LCD controller displays consumption, tariff, and status without an external driver, and the RTCC provides time-of-use billing with calendar alarms. The 128 KB Flash stores calibration constants, tariff tables, and event logs compliant with metrology standards. Per the datasheet, deep-sleep with RTCC at ~340 nA typical supports 10+ year battery life in AMR/AMI endpoints, eliminating monthly battery replacement.
Recommended
Automotive Instrument Clusters (non-safety)
The PIC24FJ128GA310T-I/PF can drive segment-LCD instrument clusters in non-safety automotive applications such as motorcycle dashboards, e-bike displays, and marine gauges. The integrated LCD controller and 128 KB Flash support multi-segment gauges, warning icons, and backlight control through PWM. Note that the -I industrial temperature grade (-40C to +85C) is not AEC-Q100 qualified, so this part is appropriate only for non-safety cluster designs; safety-critical dashboards require AEC-Q100 parts like PIC24FJ128GA310 variants with /VAO suffixes.
Recommended
IoT Edge Nodes with Local HMI
The PIC24FJ128GA310T-I/PF combines Wi-Fi/BLE companion-host capability, segment LCD, and capacitive touch via CTMU for IoT edge nodes with local displays. The peripheral pin select (PPS) system maps UART/SPI to any I/O, simplifying co-existence with radio modules. The 32 KB RAM holds MQTT buffers, OTA staging areas, and local UI state. Per the datasheet, peripheral pin select enables flexible I/O mapping for SPI sensors, I2C peripherals, and UART modems on a single 100-TQFP footprint, enabling single-board layouts for thermostat, smart-lock, and HVAC controller products.
Recommended
Recommended Products Summary
Engineering reference data for PIC24FJ128GA310T-I/PF — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC24FJ128GA310-I/PT | PIC24FJ128GA110T-I/PF | PIC24FJ128DA210T-I/PT | PIC24FJ64GA310T-I/PF | PIC24FJ128DA110T-I/PT | PIC24EP512GU810-I/PF |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 100-TQFP (PF, 14x14 mm) | 100-TQFP (PT, 12x12) - same pin count, different land pattern | 100-TQFP (PF, 14x14) - same | 100-TQFP (PT, 12x12) - same pin count, different land pattern | 100-TQFP (PF, 14x14) - same | 100-TQFP (PT, 12x12) - same pin count, different land pattern | 100-TQFP (PF, 14x14) - same |
| Core Architecture | PIC24F 16-bit, 32 MHz / 16 MIPS | PIC24F 16-bit, 32 MHz / 16 MIPS - same | PIC24F 16-bit, 32 MHz / 16 MIPS - same | PIC24F 16-bit DA, 32 MHz / 16 MIPS - same | PIC24F 16-bit, 32 MHz / 16 MIPS - same | PIC24F 16-bit DA, 32 MHz / 16 MIPS - same | PIC24EP 16-bit, 70 MIPS - faster, different firmware |
| Program Flash | 128 KB | 128 KB | 128 KB | 128 KB | 64 KB (-50%) | 128 KB | 512 KB (+300%) |
| Data RAM | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB | 48 KB |
| LCD Controller | Up to 480 segments | Up to 480 segments | None | None (PMP graphics only) | Up to 480 segments | None | None |
| CTMU (Capacitive Touch) | Yes | Yes | Yes | Yes | Yes | Yes | No |
| Deep Sleep Current | 340 nA typical (RAM retention) | 340 nA typical | 340 nA typical | 340 nA typical | 340 nA typical | 340 nA typical | ~1 uA typical (higher) |
Key Differentiators
- Integrated 480-segment LCD controller (vs PIC24FJ128GA110T-I/PF)
- Two-fold flash capacity vs lower-memory sibling (vs PIC24FJ64GA310T-I/PF)
- Lower-power XLP deep sleep vs PIC24EP core (vs PIC24EP512GU810-I/PF)
Design Notes
The PIC24FJ128GA310T-I/PF requires separate decoupling on AVDD and VDD: place 100 nF ceramic capacitors on each analog pin (AVDD/AVSS) and on every VDD/VDDCORE pair. Per the Microchip PIC24FJ128GA310 family datasheet (30009996g), the integrated LCD charge pump draws significant transient current during segment refresh - bulk decoupling (>=4.7 uF) near the VLCD pin prevents supply sag that can cause brown-out resets during display updates. Estimated: with 480 active segments at 60 Hz refresh, peak charge pump current can reach 1-2 mA depending on segment load.
The 100-pin TQFP (14x14 mm) PF land pattern has 0.5 mm pitch - use Microchip's recommended land pattern with NSMD pads for solder joint reliability. Route the trace-out layer directly under the package as a continuous ground plane to provide thermal spreading (typical theta_JA ~50 C/W) and reference for high-frequency signals. Per Microchip's app note layout guidance, keep the trace between VDD and the analog supply separated by at least 3 mm to avoid digital-to-analog coupling into the 12-bit ADC.
Do not confuse PIC24FJ128GA310 (Flash 128 KB, LCD) with PIC24FJ128GA110 (Flash 128 KB, NO LCD) or PIC24FJ64GA310 (Flash 64 KB, LCD) - same 100-TQFP package but different peripheral sets. Always verify pin 1 orientation by the dimple on the TQFP package; using wrong orientation will short power and ground pins. When migrating firmware between PIC24FJ128GA310 and PIC24EP512GU810 (same package, faster core), the entire firmware must be recompiled - the PIC24EP core is incompatible at the binary level with PIC24FJ code.
For capacitive touch via CTMU, route touch electrode traces as short as possible and shield them with a ground pour on the layer below, separated by at least 0.5 mm of FR4 dielectric. Per Microchip's mTouch design guide, CTMU measurements are highly sensitive to ground noise - keep switching regulators or high-current traces at least 10 mm away from touch pads. Use a hardware averaging factor of at least 16 in software to suppress 50/60 Hz mains pickup.
Compliance Information
Industrial grade (-40C to +85C), not AEC-Q100 qualified. RoHS and lead-free compliant per Microchip product page.
