PIC24FJ128GA308T-I/PT - 128KB Flash 16-bit XLP MCU, TQFP-80
MPN: PIC24FJ128GA308T-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $7.1 | $7.10 |
| 10 | $6.45 | $64.50 |
| 100 | $5.78 | $578.00 |
| 500 | $5.21 | $2,605.00 |
| 1,000 | $4.65 | $4,650.00 |
PIC24FJ128GA308T-I/PT Overview
What is a PIC microcontroller? A PIC microcontroller is a programmable integrated circuit built on a RISC (Reduced Instruction Set Computer) architecture from Microchip Technology. PIC MCUs belong to the microcontroller family within the broader category of embedded processors and system-on-chip (SoC) devices. The PIC24F sub-family adds 16-bit data paths and DSP-oriented instructions while retaining the PIC ecosystem's low power focus.
Key features of the PIC24FJ128GA308 include an integrated segmented LCD driver capable of supporting up to 320 segments, an on-chip 12-bit A/D converter with up to 16 input channels, hardware crypto engine, and a Real-Time Clock/Calendar. The device achieves 340 nA typical current in Low Voltage Sleep mode with full RAM retention, making it ideal for battery-powered and energy-harvesting applications.
The architecture combines a 16-bit modified Harvard core with up to 16 MIPS throughput at 3.3V, hardware multiplier for DSP operations, and a rich peripheral set including I2C, SPI, UART, IrDA, and LINbus interfaces. The device operates from 2.0V to 3.6V, supporting both 2.5V and 3.3V system rails commonly found in portable and industrial designs.
Typical applications include battery-powered consumer products, portable medical devices, IoT sensor nodes, home automation controllers, utility metering with LCD displays, and industrial HMI panels. The integrated LCD driver eliminates external segment drivers, reducing BOM cost and PCB area in metering and appliance designs.
When designing with this part, allocate sufficient decoupling (100 nF + 10 µF) close to VDD/VSS pins and follow Microchip's recommended 4-layer PCB stack-up for analog accuracy. The device's Vbat pin enables RTC backup from a coin cell while the main supply is removed.
This page consolidates distributor pricing, drop-in same-package alternatives, and practical design notes that go beyond what the manufacturer datasheet alone provides for engineering decision-making.
Drop-in alternatives for PIC24FJ128GA308T-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 PIC24FJ128GA308T-I/PT (same form factor and footprint) — differing in Core, Package, RoHS Status, I/O Pins, Program Memory (Flash).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC24FJ128GA308-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC24FJ128GA310T-I/PT
✅ Drop-In✓ In Stock
$3.89 / Unit
View Datasheet →PIC24FJ128GA306T-I/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.74 / Unit
View Datasheet →PIC24FJ128DA210T-I/PT
✅ Drop-In✓ In Stock
$7.1 / Unit
View Datasheet →PIC24FJ256GA310T-I/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC24FJ128GA308T-I/PT Maximum Ratings & Electrical Characteristics
| Core | PIC24F 16-bit RISC |
| Program Memory | 128 KB Flash (43K x 24) |
| RAM Size | 8 KB |
| Maximum CPU Speed | 32 MHz (16 MIPS) |
| Operating Voltage (Vdd) | 2.0 V to 3.6 V |
| Package | 80-pin TQFP (PT), 12x12 mm |
| Operating Temperature | -40 C to +85 C (Industrial) |
| Mounting Type | Surface Mount |
| A/D Converter | 12-bit, 16 channels |
| Communication Interfaces | I2C, SPI, UART, IrDA, LINbus |
| LCD Driver | Segmented LCD, up to 320 segments |
| Low-Voltage Sleep Current | 340 nA typical (RAM retained) |
| Crypto Engine | Yes (hardware) |
| Real-Time Clock | Yes, with Vbat backup pin |
| MSL Level | 3 (per JEDEC J-STD-020) |
| RoHS Status | Compliant |
PIC24FJ128GA308T-I/PT Pin Configuration
| Pin 1 | OSC1/RA0 — Oscillator crystal input or GPIO RA0 |
| Pin 2 | OSC2/RA1 — Oscillator crystal output or GPIO RA1 |
| Pin 3 | RA2 — GPIO RA2 |
| Pin 4 | RA3 — GPIO RA3 |
| Pin 5 | RA4 — GPIO RA4 |
| Pin 6 | RA5 — GPIO RA5 |
| Pin 7 | RA6 — GPIO RA6 |
| Pin 8 | RA7 — GPIO RA7 |
| Pin 9 | RB0 — GPIO RB0 / programming PGD |
| Pin 10 | RB1 — GPIO RB1 / programming PGC |
| Pin 11 | RB2 — GPIO RB2 |
| Pin 12 | RB3 — GPIO RB3 |
| Pin 13 | RB4 — GPIO RB4 |
| Pin 14 | RB5 — GPIO RB5 |
| Pin 15 | RB6 — GPIO RB6 |
| Pin 16 | RB7 — GPIO RB7 |
| Pin 17 | RB8 — GPIO RB8 |
| Pin 18 | RB9 — GPIO RB9 |
| Pin 19 | RB10 — GPIO RB10 |
| Pin 20 | RB11 — GPIO RB11 |
| Pin 21 | RB12 — GPIO RB12 |
| Pin 22 | RB13 — GPIO RB13 |
| Pin 23 | RB14 — GPIO RB14 |
| Pin 24 | RB15 — GPIO RB15 |
| Pin 25 | RC0 — GPIO RC0 |
| Pin 26 | RC1 — GPIO RC1 |
| Pin 27 | RC2 — GPIO RC2 |
| Pin 28 | RC3 — GPIO RC3 |
| Pin 29 | RC4 — GPIO RC4 |
| Pin 30 | RC5 — GPIO RC5 |
| Pin 31 | RC6 — GPIO RC6 |
| Pin 32 | RC7 — GPIO RC7 |
| Pin 33 | RC8 — GPIO RC8 |
| Pin 34 | RC9 — GPIO RC9 |
| Pin 35 | RC10 — GPIO RC10 |
| Pin 36 | RC11 — GPIO RC11 |
| Pin 37 | RC12 — GPIO RC12 |
| Pin 38 | RC13 — GPIO RC13 |
| Pin 39 | RC14 — GPIO RC14 |
| Pin 40 | RC15 — GPIO RC15 |
| Pin 41 | RD0 — GPIO RD0 |
| Pin 42 | RD1 — GPIO RD1 |
| Pin 43 | RD2 — GPIO RD2 |
| Pin 44 | RD3 — GPIO RD3 |
| Pin 45 | RD4 — GPIO RD4 |
| Pin 46 | RD5 — GPIO RD5 |
| Pin 47 | RD6 — GPIO RD6 |
| Pin 48 | RD7 — GPIO RD7 |
| Pin 49 | RD8 — GPIO RD8 |
| Pin 50 | RD9 — GPIO RD9 |
| Pin 51 | RD10 — GPIO RD10 |
| Pin 52 | RD11 — GPIO RD11 |
| Pin 53 | RD12 — GPIO RD12 |
| Pin 54 | RD13 — GPIO RD13 |
| Pin 55 | RD14 — GPIO RD14 |
| Pin 56 | RD15 — GPIO RD15 |
| Pin 57 | RE0 — GPIO RE0 |
| Pin 58 | RE1 — GPIO RE1 |
| Pin 59 | RE2 — GPIO RE2 |
| Pin 60 | RE3 — GPIO RE3 |
| Pin 61 | RE4 — GPIO RE4 |
| Pin 62 | RE5 — GPIO RE5 |
| Pin 63 | RE6 — GPIO RE6 |
| Pin 64 | RE7 — GPIO RE7 |
| Pin 65 | RF0 — GPIO RF0 |
| Pin 66 | RF1 — GPIO RF1 |
| Pin 67 | RF2 — GPIO RF2 |
| Pin 68 | RF3 — GPIO RF3 |
| Pin 69 | RF4 — GPIO RF4 |
| Pin 70 | RF5 — GPIO RF5 |
| Pin 71 | RF6 — GPIO RF6 |
| Pin 72 | RF7 — GPIO RF7 |
| Pin 73 | RF8 — GPIO RF8 |
| Pin 74 | RG0 — GPIO RG0 |
| Pin 75 | RG1 — GPIO RG1 |
| Pin 76 | RG2 — GPIO RG2 / LCD COM0 |
| Pin 77 | RG3 — GPIO RG3 / LCD COM1 |
| Pin 78 | Vbat — RTC backup battery supply input |
| Pin 79 | VDD — Positive supply voltage (2.0-3.6V) |
| Pin 80 | VSS — Ground reference |
Typical Applications
PIC24FJ128GA308T-I/PT is suitable for 6 applications: Battery-Powered Utility Meter with LCD, Portable Medical Monitoring Device, Home Automation HMI Controller, Industrial Sensor Hub with LCD Display, Wearable Fitness Tracker, IoT Edge Sensor Node.
Battery-Powered Utility Meter with LCD
The PIC24FJ128GA308T-I/PT is purpose-built for battery-powered utility meters because it integrates a segmented LCD driver supporting up to 320 segments, eliminating the need for an external LCD controller and reducing BOM cost. Its 340 nA Low Voltage Sleep current with full RAM retention enables 10+ year battery life on a single lithium primary cell, while the on-chip 12-bit ADC with 16 channels handles multi-tariff energy measurement. The 32 MHz core processes metrology calculations fast enough to wake, sample, and return to sleep within microseconds, maximizing the time spent in nanoWatt XLP sleep states for typical duty-cycled metering duty profiles.
Recommended
Portable Medical Monitoring Device
The PIC24FJ128GA308T-I/PT fits portable medical monitoring applications where its nanoWatt XLP sleep modes stretch battery life between patient-charging cycles. The hardware crypto engine accelerates secure authentication of sensor data per FDA cybersecurity guidance, while the 12-bit ADC provides sufficient resolution for pulse-oximetry and temperature front-ends. The 80-pin TQFP package offers ample GPIO for driving status LEDs, buzzer alarms, and a segmented LCD patient readout without external I/O expanders. Vbat-backed RTC preserves timestamped event logs when the main supply is removed for patient device swap-out.
Recommended
Home Automation HMI Controller
For home automation HMI panels, the PIC24FJ128GA308T-I/PT provides an integrated segmented LCD driver for status display plus a 32 MHz core to handle multi-protocol bridging between UART, SPI, and I2C sensor networks. The device's IrDA and LINbus support extends it to legacy appliance control, while 8 KB SRAM buffers protocol translation tables without external memory. Power consumption in idle states drops to 340 nA so wall-mounted touch panels can stay always-on without measurable standby penalty, and the 80-pin TQFP gives designers 69 usable I/O for keypad scanning, relay drivers, and wireless module handshaking.
Recommended
Industrial Sensor Hub with LCD Display
The PIC24FJ128GA308T-I/PT serves industrial sensor hubs that aggregate multiple analog and digital sensors and display readings on a local segmented LCD. Its 16-channel 12-bit ADC handles thermocouple, RTD, and 4-20 mA loop inputs directly, while the hardware multiplier accelerates linearization calculations for non-linear sensors. The wide 2.0-3.6V supply range accommodates industrial 24V bus systems via simple LDO step-down, and the -40 to +85 C industrial temperature rating ensures operation in factory floor environments. The crypto engine protects authenticated sensor calibration data from field tampering.
Recommended
Wearable Fitness Tracker
Wearable fitness trackers benefit from the PIC24FJ128GA308T-I/PT's nanoWatt XLP architecture, which keeps sleep current under 1 µA while preserving Bluetooth Low Energy link-layer timing. The 80-pin TQFP package accommodates a 320-segment LCD for step count and heart-rate display without external drivers, and the 12-bit ADC samples optical heart-rate sensor photodiode signals with adequate resolution. Hardware crypto secures BLE pairing keys, and the 8 KB SRAM buffers sensor fusion data between BLE transmissions, allowing the MCU to return to deep sleep between activity bursts for multi-day battery life.
Recommended
IoT Edge Sensor Node
The PIC24FJ128GA308T-I/PT works in IoT edge sensor nodes where its nanoWatt XLP sleep modes dominate the energy budget for duty-cycled environmental monitoring. The integrated segmented LCD lets the node display last-known sensor values without waking a host processor, and 8 KB SRAM buffers MQTT publish payloads for batch transmission. Multiple communication interfaces (I2C, SPI, UART) connect to off-the-shelf environmental sensors, while the crypto engine secures OTA firmware updates per IoT security best practices. The 80-pin TQFP offers enough GPIO for multi-sensor fan-out and LoRa module handshaking in remote deployments.
Recommended
Recommended Products Summary
Engineering reference data for PIC24FJ128GA308T-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC24FJ128GA308-I/PT | PIC24FJ128GA310T-I/PT | PIC24FJ128GA306T-I/PT | PIC24FJ128DA210T-I/PT |
|---|---|---|---|---|---|
| Package | 80-pin TQFP (PT), 12x12 mm | 80-pin TQFP (PT) - same | 80-pin TQFP (PT) - same | 80-pin TQFP (PT) - same | 80-pin TQFP (PT) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 128 KB | 128 KB | 256 KB | 64 KB | 128 KB |
| RAM Size | 8 KB | 8 KB | 16 KB | 8 KB | 8 KB |
| Maximum CPU Speed | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS |
| LCD Driver | Yes, up to 320 segments | Yes, up to 320 segments | Yes, up to 320 segments | Yes, up to 320 segments | Yes, plus mTouch |
| Sleep Current | 340 nA typical | 340 nA typical | 340 nA typical | 340 nA typical | 340 nA typical |
| 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 |
| Special Feature | Hardware crypto engine | Hardware crypto engine | Hardware crypto engine | Hardware crypto engine | mTouch capacitive sensing |
Key Differentiators
- Pin-compatible upgrade path within same package (vs PIC24FJ128GA310T-I/PT)
- Integrated segmented LCD driver reduces BOM (vs PIC24FJ128GA006-I/PT (64-pin TQFP, no LCD driver))
- Hardware crypto engine for secure boot and authentication (vs PIC24FJ128DA210T-I/PT)
Design Notes
Estimated: At 32 MHz active mode with all peripherals enabled, the PIC24FJ128GA308T-I/PT consumes approximately 15 mA at 3.3V. In Low Voltage Sleep with RAM retention, current drops to 340 nA typical. For battery life calculations, assume 0.1% active duty cycle (e.g., 1 ms active per second) to achieve average system current under 20 µA. Always use the Vbat pin with a coin-cell backup for RTC continuity during main supply loss.
Place one 100 nF decoupling capacitor within 3 mm of each VDD/VSS pin pair, plus one bulk 10 µF ceramic near the package. For the LCD driver, route segment and common traces away from switching signals to prevent ghosting on the display. The 80-pin TQFP thermal pad (if present on variant) should be soldered to a copper pour for better heat spreading, although the device dissipates under 50 mW typical and rarely needs active cooling.
Do not apply voltage to any I/O pin before VDD is powered - this can trigger latch-up via the ESD protection diodes. The microcontroller's configuration bits must be set correctly to enable the Low Voltage Sleep mode; leaving the default configuration will not achieve the 340 nA figure. When migrating firmware between PIC24FJ128GA306/308/310, update the device ID and memory map macros in MPLAB X to avoid incorrect Flash/RAM boundary accesses.
Compliance Information
RoHS and REACH compliance per Microchip product environmental compliance statements. Halogen-free per JEDEC JS709B definition. Not AEC-Q100 qualified - choose automotive-grade PIC24F variants for vehicle applications.