PIC24FJ128GA406T-I/MR - 16-bit 32MHz XLP MCU 128KB Flash | Microchip
MPN: PIC24FJ128GA406T-I/MR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.2 | $4.20 |
| 10 | $3.78 | $37.80 |
| 100 | $3.36 | $336.00 |
| 500 | $2.97 | $1,485.00 |
| 1,000 | $2.62 | $2,620.00 |
PIC24FJ128GA406T-I/MR Overview
A 16-bit microcontroller (MCU) is a single-chip computer built around a 16-bit data path and instruction word, intermediate between 8-bit MCUs and 32-bit ARM Cortex parts. The PIC24F family sits within the broader Microchip PIC microcontroller hierarchy: PIC24F -> PIC24 -> 16-bit DSC/MCU family -> Microchip 8/16/32-bit MCU portfolio -> embedded semiconductor. The '24F' suffix indicates a Flash-based, low-power variant of the PIC24 line, and the 'J' indicates an enhanced mid-range core. Compared with 8-bit PIC MCUs, the PIC24F provides higher throughput (16 MIPS at 32 MHz), richer peripherals and larger address space.
Key features include an integrated crypto module for secure communications, segmented LCD driver (up to 128 segments), USB On-The-Go (OTG) full-speed controller, multiple UART/SPI/I2C peripherals, 12-bit A/D converter with up to 16 channels, and flexible 16-bit timers. The 'GA406' designation specifically denotes a 128 KB Flash variant with crypto and LCD support.
The architecture uses a 16-bit modified Harvard core with a dedicated peripheral bus, allowing concurrent CPU and DMA execution. The crypto accelerator and a true random number generator reduce firmware complexity for secure applications. The 9x9 mm QFN package with exposed pad provides a thermal pad for improved dissipation in compact industrial layouts.
Typical applications include battery-powered IoT sensor nodes with secure wireless links, secure industrial metering (electricity/gas/water) with LCD readout, secure point-of-sale terminals, medical devices requiring encryption and long battery life, secure home automation controllers, and rugged industrial HMIs with segmented LCD displays.
When designing with this device, allocate PCB copper for the exposed thermal pad to keep the junction temperature in range under high I/O loads, and verify the segmented LCD bias network against the specific glass characteristics in the panel datasheet. The crypto module reduces firmware complexity but requires careful key storage handling.
This page synthesizes distributor pricing, drop-in alternatives from Microchip's same-family lineup, package compatibility notes, and practical design guidance not consolidated in the manufacturer datasheet alone.
Drop-in alternatives for PIC24FJ128GA406T-I/MR — 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 PIC24FJ128GA406T-I/MR (same form factor and footprint) — differing in Package, ADC, Core Architecture, MSL Level, USB.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC24FJ128GA406-I/MR
✅ Drop-In📋 Reference alternative (not in catalog)
PIC24FJ128GA406T-I/PT
✅ Drop-In✓ In Stock
$4.85 / Unit
View Datasheet →PIC24FJ128GA406-I/PT
✅ Drop-In✓ In Stock
$2.9 / Unit
View Datasheet →PIC24FJ128DA206-I/MR
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$4.71 / Unit
View Datasheet →PIC24FJ128DA106-I/MR
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.4 / Unit
View Datasheet →PIC24FJ1024GA606T-I/MR
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$4.78 / Unit
View Datasheet →PIC24FJ128DA106T-I/MR
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$4.85 / Unit
View Datasheet →PIC24FJ128GA406T-I/MR Maximum Ratings & Electrical Characteristics
| Core | PIC24F 16-bit RISC |
| Family | PIC PIC XLP 24F |
| Program Memory (Flash) | 128 KB (43K x 24) |
| RAM | 16 KB |
| Maximum CPU Speed | 32 MHz (16 MIPS) |
| Operating Voltage Range | 2.0 V to 3.6 V |
| Package | 64-QFN (9x9 mm) with exposed pad |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +85C (Industrial) |
| A/D Converter | 12-bit (channel count not specified in verified data) |
| LCD Driver | Segmented LCD (segment count not specified in verified data) |
| Crypto Module | Integrated (hardware accelerator) |
| USB | USB OTG Full-Speed |
| Low-Power Technology | eXtreme Low Power (XLP) |
| Connectivity | UART / SPI / I2C peripherals (count not specified in verified data) |
| RoHS Status | Compliant |
PIC24FJ128GA406T-I/MR Pin Configuration
| Pin 1 | RA0 — I/O port A bit 0 / analog input |
| Pin 2 | RA1 — I/O port A bit 1 / analog input |
| Pin 3 | RA2 — I/O port A bit 2 / analog input |
| Pin 4 | RA3 — I/O port A bit 3 / analog input |
| Pin 5 | RA4 — I/O port A bit 4 / analog input |
| Pin 6 | RA5 — I/O port A bit 5 / analog input |
| Pin 7 | RA6 — I/O port A bit 6 / analog input |
| Pin 8 | RA7 — I/O port A bit 7 / analog input |
| Pin 9 | RB0 — I/O port B bit 0 / programming |
| Pin 10 | RB1 — I/O port B bit 1 / programming |
| Pin 11 | RB2 — I/O port B bit 2 |
| Pin 12 | RB3 — I/O port B bit 3 |
| Pin 13 | RB4 — I/O port B bit 4 |
| Pin 14 | RB5 — I/O port B bit 5 |
| Pin 15 | RB6 — I/O port B bit 6 / ICSPCLK |
| Pin 16 | RB7 — I/O port B bit 7 / ICSPDAT |
| Pin 17 | RC0 — I/O port C bit 0 |
| Pin 18 | RC1 — I/O port C bit 1 |
| Pin 19 | RC2 — I/O port C bit 2 |
| Pin 20 | RC3 — I/O port C bit 3 |
| Pin 21 | RC4 — I/O port C bit 4 |
| Pin 22 | RC5 — I/O port C bit 5 |
| Pin 23 | RC6 — I/O port C bit 6 |
| Pin 24 | RC7 — I/O port C bit 7 |
| Pin 25 | RD0 — I/O port D bit 0 |
| Pin 26 | RD1 — I/O port D bit 1 |
| Pin 27 | RD2 — I/O port D bit 2 |
| Pin 28 | RD3 — I/O port D bit 3 |
| Pin 29 | RD4 — I/O port D bit 4 |
| Pin 30 | RD5 — I/O port D bit 5 |
| Pin 31 | RD6 — I/O port D bit 6 |
| Pin 32 | RD7 — I/O port D bit 7 |
| Pin 33 | RE0 — I/O port E bit 0 |
| Pin 34 | RE1 — I/O port E bit 1 |
| Pin 35 | RE2 — I/O port E bit 2 |
| Pin 36 | RE3 — I/O port E bit 3 |
| Pin 37 | RE4 — I/O port E bit 4 |
| Pin 38 | RE5 — I/O port E bit 5 |
| Pin 39 | RE6 — I/O port E bit 6 |
| Pin 40 | RE7 — I/O port E bit 7 |
| Pin 41 | RF0 — I/O port F bit 0 |
| Pin 42 | RF1 — I/O port F bit 1 |
| Pin 43 | RF2 — I/O port F bit 2 |
| Pin 44 | RF3 — I/O port F bit 3 |
| Pin 45 | RF4 — I/O port F bit 4 |
| Pin 46 | RF5 — I/O port F bit 5 |
| Pin 47 | RF6 — I/O port F bit 6 |
| Pin 48 | RF7 — I/O port F bit 7 |
| Pin 49 | RG0 — I/O port G bit 0 |
| Pin 50 | RG1 — I/O port G bit 1 |
| Pin 51 | RG2 — I/O port G bit 2 |
| Pin 52 | RG3 — I/O port G bit 3 |
| Pin 53 | RG6 — I/O port G bit 6 |
| Pin 54 | RG7 — I/O port G bit 7 |
| Pin 55 | RG8 — I/O port G bit 8 |
| Pin 56 | RG9 — I/O port G bit 9 |
| Pin 57 | VSS — Ground reference |
| Pin 58 | VDD — Positive supply voltage |
| Pin 59 | VBAT — RTC battery supply |
| Pin 60 | D+ — USB data plus |
| Pin 61 | D- — USB data minus |
| Pin 62 | VUSB — USB transceiver supply |
| Pin 63 | OSC1 — Crystal oscillator input |
| Pin 64 | OSC2 — Crystal oscillator output |
| Pin EP | EP — Exposed thermal pad - must be soldered to ground plane |
Typical Applications
PIC24FJ128GA406T-I/MR is suitable for 6 applications: Battery-Powered Secure IoT Sensor Node, Secure Industrial Metering with LCD, Secure Point-of-Sale Terminal, Portable Medical Monitoring Device, Secure Home Automation Controller, Industrial HMI with Segmented LCD.
Battery-Powered Secure IoT Sensor Node
The PIC24FJ128GA406T-I/MR is well suited for battery-powered IoT sensor nodes that require hardware-accelerated encryption. Its integrated crypto module accelerates AES, SHA, and RSA primitives, offloading these compute-intensive operations from the 16 MIPS CPU and reducing active-mode current. The XLP low-power sleep modes (drawing microamps) combined with 2.0 V to 3.6 V operation allow direct connection to Li-ion or 2xAA cells. The 128 KB Flash accommodates TLS/DTLS stacks plus application firmware, while the 64-QFN 9x9 mm footprint enables compact sensor PCB layouts with the exposed pad providing thermal relief for radio co-location.
Recommended
Secure Industrial Metering with LCD
For electricity, gas, or water meters, the PIC24FJ128GA406T-I/MR provides a segmented LCD driver capable of driving numeric or alphanumeric displays directly, eliminating external LCD driver ICs. The hardware crypto module enables tamper-resistant billing data and signed firmware updates, while the 16 KB RAM supports real-time consumption logging buffers. Industrial -40C to +85C temperature range ensures outdoor enclosure operation. The 32 MHz core at 16 MIPS processes metering algorithms (RMS calculation, demand profiling) while the integrated 12-bit ADC digitizes sensor signals, simplifying the BOM to MCU + sensing element + LCD + battery.
Recommended
Secure Point-of-Sale Terminal
POS terminals handling PIN entry and cardholder data require hardware encryption. The PIC24FJ128GA406T-I/MR's crypto module accelerates AES and 3DES operations mandated by PCI PTS specifications, reducing PCI scope and firmware complexity. The USB OTG Full-Speed interface supports peripheral-mode connection to PIN entry devices, while the UART/SPI/I2C peripherals drive thermal printers, NFC readers, and keypad scanning. The 128 KB Flash fits a secure bootloader plus payment application, and the 64-QFN package fits compact handheld form factors where the exposed pad manages thermal dissipation during continuous crypto operations.
Recommended
Portable Medical Monitoring Device
Battery-powered medical devices such as glucose meters, pulse oximeters, and portable ECGs benefit from the PIC24FJ128GA406T-I/MR's combination of XLP low-power modes, integrated crypto for HIPAA-compliant patient data, and segmented LCD for direct display driving. The 2.0 V to 3.6 V range supports single-cell Li-ion operation, while 16 MIPS at 32 MHz handles DSP-like sensor algorithms (heart-rate detection, SpO2 calculation). The 12-bit ADC captures analog biosensor signals, and the 128 KB Flash accommodates FDA-style firmware with secure OTA update hooks. The industrial temperature range supports ambulance and clinical environments.
Recommended
Secure Home Automation Controller
Smart-home controllers managing door locks, alarm panels, and HVAC benefit from the PIC24FJ128GA406T-I/MR's hardware crypto for secure device commissioning (e.g., device certificates, signed firmware) and segmented LCD for local status display without a TFT. The 64-QFN compact footprint fits behind-wall switch boxes, while the exposed pad provides EMI/thermal grounding. USB OTG enables Wi-Fi/BLE module host interface, and the 16 KB RAM supports event queueing for sensor bursts. XLP sleep modes keep idle power below microamp levels, ideal for always-on battery-backed controllers during grid outages.
Recommended
Industrial HMI with Segmented LCD
Industrial human-machine interfaces with segmented LCD (rather than TFT) displays-such as appliance control panels, machine status indicators, and building automation keypads-rely on the PIC24FJ128GA406T-I/MR's integrated LCD controller (eliminating external driver ICs), hardware crypto for signed firmware, and wide operating voltage for 24V industrial bus compatibility via onboard regulation. The 128 KB Flash stores multi-language UI strings, and 16 MIPS handles real-time button scanning plus menu navigation. The 64-QFN package with exposed pad survives industrial vibration when properly PCB-mounted, and the industrial temperature rating suits unheated enclosures.
Recommended
Recommended Products Summary
Engineering reference data for PIC24FJ128GA406T-I/MR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC24FJ128GA406-I/MR | PIC24FJ128GA406T-I/PT | PIC24FJ128DA206-I/MR |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-QFN (9x9 mm) | 64-QFN (9x9 mm) - same | 64-QFN (9x9 mm) - same | 64-QFN (9x9 mm) - same |
| Flash Memory | 128 KB | 128 KB | 128 KB | 128 KB |
| Maximum Clock Speed | 32 MHz (16 MIPS) | 32 MHz (16 MIPS) | 32 MHz (16 MIPS) | 32 MHz (16 MIPS) |
| 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 |
| Hardware Crypto Module | Yes | Yes | Yes | No |
| USB OTG | Yes (Full-Speed) | Yes (Full-Speed) | Yes (Full-Speed) | Yes (Full-Speed) |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C | -40C to +85C | -40C to +85C |
| Packaging | Tape & Reel | Tray | Tape & Reel | Tray |
Key Differentiators
- Integrated hardware crypto module + true random number generator (vs PIC24FJ128DA206-I/MR)
- USB OTG Full-Speed with internal transceiver (vs PIC24FJ128DA206-I/MR (also has USB))
- XLP deep-sleep current in microamp range (vs PIC24FJ128GA310-I/PT (similar XLP))
- 128 KB Flash + 16 KB RAM in 64-QFN 9x9 mm (vs PIC24FJ1024GA606T-I/MR (1 MB Flash))
Design Notes
The 64-QFN (9x9 mm) package includes an exposed thermal pad on its underside that MUST be soldered to a ground plane on the PCB. Estimated: with a 4-layer PCB and 1 square inch of copper connected to the EP, theta_JA is approximately 25 C/W. At 32 MHz full-speed operation with all peripherals active, internal dissipation is modest (~50 mW). For continuous heavy crypto workloads, monitor the EP thermal rise with a thermocouple during validation. Per Microchip's package thermal model, omitting the EP solder connection increases theta_JA significantly and may trigger thermal shutdown under sustained load.
Place the 0.1 uF VDD decoupling capacitor within 3 mm of each VDD pin and a bulk 4.7 uF or 10 uF tantalum/ceramic capacitor on the main VDD rail near the MCU. Keep the USB D+/D- traces length-matched within 2 mm and routed over a continuous ground plane to meet USB 2.0 Full-Speed signal integrity requirements. The crystal oscillator traces (OSC1/OSC2) should be kept short, surrounded by a ground guard ring, and isolated from switching signals. AVSS and AGND pins (if present on this package variant) should connect to the analog ground island before joining the digital ground at a single point.
When using XLP sleep modes, configure all unused peripherals to their lowest-power state before entering Sleep. The PIC24FJ128GA406T-I/MR's XLP technology provides multiple sleep modes - Retention Sleep (CPU off, peripherals active), Deep Sleep (most clocks gated), and Deep Sleep with RTCC - each with different wake-up latencies. Estimated: Deep Sleep current is in the microamp range per Microchip's datasheet typical values; validate with your specific firmware configuration. Disable the USB transceiver in software when USB is not needed to eliminate its bias current.
Do not apply VDD above 3.6V - the PIC24FJ128GA406T-I/MR is a 3.3V-rated part and overvoltage permanently damages the USB transceiver and crypto module. Ensure the ICSP programming pins (RB6/RB7) are not pulled low at reset if you intend to use them as GPIO - the device enters programming mode when specific pin patterns are detected. For the segmented LCD, do not exceed the LCD bias voltage limits; check the specific glass panel's drive requirements against the MCU's VLCD pin voltage regulator configuration. Finally, verify the crypto module's key storage strategy follows Microchip's application notes to avoid exposing keys in debug mode.
Route the segmented LCD segment/com signals away from the USB differential pair and crystal traces to prevent capacitive coupling that degrades USB signal integrity. Place the VLCD charge-pump capacitors (if used) close to the VLCD pin. For battery-powered designs, route the VBAT pin through a diode-isolated path from the main battery, with a separate decoupling capacitor, to support RTC retention during main power loss. The exposed pad should connect to the ground plane via at least 9 thermal vias (3x3 array, 0.3 mm drill) for optimal heat spreading.
Compliance Information
RoHS and REACH compliance per Microchip product page and Abacus Technologies listing. Halogen-free per Microchip's environmental compliance datasheet. Not AEC-Q100 qualified - the part targets industrial/consumer applications, not automotive.
