PIC24FJ128GB412T-I/BG - 16-Bit 32MHz 128KB Flash MCU | Microchip
MPN: PIC24FJ128GB412T-I/BG ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.42 | $5.42 |
| 10 | $4.86 | $48.60 |
| 100 | $4.21 | $421.00 |
| 500 | $3.74 | $1,870.00 |
| 1,000 | $3.31 | $3,310.00 |
PIC24FJ128GB412T-I/BG Overview
An MCU (microcontroller) is a single-chip computer that integrates a CPU core, program memory (Flash), data memory (SRAM), and a rich set of peripherals into one IC. The PIC24F family targets low-power embedded applications; PIC24FJ128GB412 specifically belongs to the GB412 sub-family distinguished by its hardware crypto engine (AES/SHA/RNG), USB 2.0 On-The-Go controller with integrated PHY, segment-LCD driver, and 128 KB Flash with dual-partition safety features for fail-safe firmware updates.
Key features include an integrated hardware cryptographic module supporting AES, DES, 3DES, SHA-1, SHA-256 and true random number generation; 16 channels of 10-bit ADC; four UART, three SPI, three I2C, and a parallel port; CTMU for capacitive touch sensing; and eXtreme Low Power modes drawing under 1 uA in deep sleep. The device operates from 2.0V to 3.6V and includes a peripheral pin select (PPS) system that allows flexible remapping of digital peripherals to physical pins.
The PIC24FJ128GB412 uses a Harvard-architecture 16-bit CPU with modified RISC instruction set supporting atomic bit operations, 16x16 hardware multiply in a single cycle, and DSP-friendly instructions. The dual-partition Flash allows live firmware updates without bricking the device - critical for IoT and medical devices requiring field updates.
Typical applications include secure IoT endpoints with TLS/DTLS firmware, USB peripherals such as barcode scanners and POS terminals, segment-LCD human-machine interfaces (HMIs), battery-powered medical devices needing eXtreme Low Power sleep, secure token authenticators, industrial sensor nodes, and USB-C chargers with authentication. The hardware crypto engine accelerates TLS handshakes and secure boot.
When designing with this device, allocate careful attention to USB OTG routing, place the 121-ball TFBGA decoupling capacitors immediately under the package, and review the dual-partition bootloader flow for fail-safe OTA updates. JTAG/ICSP programming pins (PGECx/PGEDx) require a dedicated pair - all VDD/VSS balls must be connected for correct operation.
This page synthesizes distributor pricing, verified drop-in alternatives, and engineering design notes not found in the standalone Microchip datasheet, giving buyers and design engineers a complete decision-ready view of the PIC24FJ128GB412T-I/BG.
Drop-in alternatives for PIC24FJ128GB412T-I/BG — 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 PIC24FJ128GB412T-I/BG (same form factor and footprint) — differing in Package, Core Architecture, ADC, Program Memory (Flash), USB.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC24FJ128GB412-I/BG
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC24FJ128GA412T-I/BG
✅ Drop-In✓ In Stock
$3.18 / Unit
View Datasheet →PIC24FJ128GA610-I/BG
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC24FJ1024GB610-I/BG
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$7.44 / Unit
View Datasheet →PIC24FJ128GB412T-I/BG Maximum Ratings & Electrical Characteristics
| Core | PIC24F 16-bit MCU |
| Family | PIC24FJ128GB412 |
| Architecture | Modified Harvard, 16-bit data/24-bit instructions |
| Program Memory (Flash) | 128 KB (43K x 24 instruction words) dual-partition |
| SRAM | 16 KB |
| EEPROM Emulation | Yes (in Flash) |
| CPU Speed | 32 MHz (16 MIPS) |
| Operating Voltage | 2.0 V to 3.6 V |
| Package | 121-ball TFBGA (BG), 10x10 mm |
| Temperature Range | -40 C to +85 C (Industrial) |
| USB | USB 2.0 OTG with integrated PHY |
| Hardware Crypto | AES, DES/3DES, SHA-1, SHA-256, RNG |
| LCD Driver | Segment LCD, up to 320 segments |
| ADC | 10-bit, up to 16 channels |
| Timers | 5 x 16-bit, 5 x 32-bit |
| UART / SPI / I2C | 4 / 3 / 3 |
| Peripheral Pin Select (PPS) | Yes |
| CTMU (Capacitive Touch) | Yes |
| DMA | 8 channels |
| Mounting Type | Surface Mount (BGA) |
| RoHS Status | Compliant |
| MSL Level | 3 (168 hours) |
| eXtreme Low Power Sleep Current | <1 uA (typical, deep sleep) |
PIC24FJ128GB412T-I/BG 121-ball tfbga (bg), 10x10 mm Pin Configuration Guide
Pin configuration for PIC24FJ128GB412T-I/BG (121-ball tfbga (bg), 10x10 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 PIC24FJ128GB412T-I/BG.
Refer to the datasheet for full pin configuration.
Typical Applications
PIC24FJ128GB412T-I/BG is suitable for 7 applications: Secure IoT Sensor Endpoints, USB OTG Peripherals and POS Terminals, Segment-LCD Human-Machine Interfaces, Battery-Powered Medical Devices, Secure Token Authenticators and Hardware Security Modules, Industrial Sensor Nodes and Field Transmitters, USB-C Chargers with Authentication.
Secure IoT Sensor Endpoints
The PIC24FJ128GB412T-I/BG is purpose-built for secure IoT sensor endpoints running TLS/DTLS over Wi-Fi co-processor or Bluetooth modules. Its hardware cryptographic engine accelerates AES-128/256 and SHA-256 hashing, offloading TLS handshake operations from the 16 MIPS CPU - reducing both handshake latency and current consumption. With 128 KB dual-partition Flash, the device supports fail-safe OTA firmware updates over USB or serial, ensuring deployed sensors can be patched without bricking. eXtreme Low Power deep-sleep under 1 uA extends battery life to multi-year operation on a coin cell, making it ideal for environmental monitoring, smart agriculture, and asset-tracking endpoints.
Recommended
USB OTG Peripherals and POS Terminals
The PIC24FJ128GB412T-I/BG integrates a USB 2.0 On-The-Go controller with on-chip PHY, eliminating the need for an external USB transceiver in barcode scanners, POS terminals, USB printers, and HID peripherals. The 32 MHz / 16 MIPS PIC24F core handles USB stack processing and application logic concurrently, while 16 KB SRAM buffers high-throughput endpoint transfers. The hardware crypto engine accelerates EMV chip-card authentication in payment terminals. Designers benefit from peripheral pin select (PPS), which lets them route USB D+/D-, UART, SPI, and I2C to available TFBGA balls without rigid pin-function assignment, accelerating PCB layout.
Recommended
Segment-LCD Human-Machine Interfaces
The PIC24FJ128GB412T-I/BG drives up to 320 LCD segments directly without an external LCD driver, integrating bias generation and charge pump on-chip. This makes it a strong fit for appliance control panels, medical device HMIs, industrial gauges, and consumer electronics requiring 7-segment or custom-segment displays. The CTMU peripheral enables capacitive touch buttons alongside the LCD, allowing unified touch-and-display UI in a single chip. Operating from 2.0V to 3.6V and drawing under 1 uA in deep sleep, it is well-suited to battery-powered segment-LCD devices like wireless thermostats, blood pressure monitors, and IoT sensor readouts.
Recommended
Battery-Powered Medical Devices
The PIC24FJ128GB412T-I/BG is suitable for battery-powered medical devices such as portable glucose meters, pulse oximeters, and wearable health monitors. eXtreme Low Power technology delivers deep-sleep currents below 1 uA, allowing weeks-to-years of operation on small lithium coin cells. The 10-bit ADC with 16 channels supports multi-sensor signal acquisition (SpO2, temperature, motion), while CTMU provides touch-based user input without mechanical buttons. The hardware cryptographic engine secures patient data transmitted over BLE or USB, addressing HIPAA-style encryption requirements. The 121-ball TFBGA enables compact PCB designs in wearable form factors.
Recommended
Secure Token Authenticators and Hardware Security Modules
The PIC24FJ128GB412T-I/BG serves as the core of USB security tokens, smart-card authenticators, and FIDO2-style hardware authenticators. Its hardware cryptographic engine - supporting AES-128/192/256, DES/3DES, SHA-1, SHA-256, and true random number generation - accelerates authentication handshakes while the USB OTG controller handles host communication. The 128 KB dual-partition Flash allows secure firmware updates while maintaining a recovery partition. eXtreme Low Power idle ensures the token draws negligible current when not in use. The compact 121-ball TFBGA 10x10 mm footprint supports dongle-style USB-A form factors.
Recommended
Industrial Sensor Nodes and Field Transmitters
The PIC24FJ128GB412T-I/BG powers industrial sensor nodes measuring temperature, pressure, flow, or vibration in 4-20 mA loop-powered or battery-backed field transmitters. The -40 C to +85 C industrial temperature range covers harsh factory environments, while eXtreme Low Power sleep modes let battery-powered nodes operate for years on primary cells. The hardware crypto engine secures Modbus-TCP, PROFINET, or wireless sensor telemetry against tampering. With 16 ADC channels, multiple sensor inputs are multiplexed into a single chip, and peripheral pin select allows flexible PCB layout. The dual-partition architecture enables secure remote firmware updates in deployed industrial systems.
Recommended
USB-C Chargers with Authentication
The PIC24FJ128GB412T-I/BG integrates USB OTG and hardware cryptography, making it ideal for USB-C charger controllers that authenticate attached devices and negotiate power profiles. Its AES/SHA engine validates USB-PD authentication certificates, while USB OTG handles data-line communication with chargers and devices. The 32 MHz CPU runs USB-PD state machines, display updates on small segment LCDs, and authentication handshakes simultaneously. Operating at 2.0V to 3.6V, the device pairs with high-voltage USB-PD PHY front-ends. The compact 10x10 mm TFBGA supports small-form-factor wall-charger designs.
Recommended
Recommended Products Summary
Engineering reference data for PIC24FJ128GB412T-I/BG — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC24FJ128GB412-I/BG | PIC24FJ128GA412T-I/BG | PIC24FJ128GA610-I/BG | PIC24FJ1024GB610-I/BG |
|---|---|---|---|---|---|
| Package | 121-ball TFBGA (BG) 10x10 mm | 121-ball TFBGA (BG) 10x10 mm - same | 121-ball TFBGA (BG) 10x10 mm - same | 121-ball TFBGA (BG) 10x10 mm - same | 121-ball TFBGA (BG) 10x10 mm - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 128 KB dual-partition | 128 KB dual-partition | 128 KB dual-partition | 256 KB | 1 MB |
| SRAM | 16 KB | 16 KB | 16 KB | 32 KB | 32 KB |
| Hardware Crypto Engine | AES, DES/3DES, SHA-1/256, RNG | AES, DES/3DES, SHA-1/256, RNG | No hardware crypto | No hardware crypto | AES, DES/3DES, SHA-1/256, RNG |
| USB | USB 2.0 OTG with integrated PHY | USB 2.0 OTG with integrated PHY | USB 2.0 OTG with integrated PHY | No USB | USB 2.0 OTG with integrated PHY |
| CPU Speed | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS |
| LCD Driver | Segment LCD up to 320 segments | Segment LCD up to 320 segments | Segment LCD up to 320 segments | Segment LCD up to 480 segments | Segment LCD up to 480 segments |
Key Differentiators
- Integrated hardware cryptographic engine on a 32 MHz PIC24F MCU (vs PIC24FJ128GA412T-I/BG)
- Dual-partition Flash architecture for fail-safe OTA updates (vs PIC24FJ128GA610-I/BG)
- eXtreme Low Power technology with sub-1 uA deep sleep (vs PIC24FJ1024GB610-I/BG)
Design Notes
The 121-ball TFBGA 10x10 mm package requires careful PCB layout. All VDD/VSS balls must be connected for proper operation - per Microchip datasheet, leaving any power ball floating can cause latch-up or reset failures. Place 100 nF decoupling capacitors immediately adjacent to each VDD ball, and a single 4.7 uF bulk capacitor near the package. Use micro-vias (0.2-0.3 mm) on inner escape layers to route out the 0.65 mm pitch ball grid; avoid dog-bone fanouts that exceed the escape density. The exposed center balls (if any) should be soldered to a continuous ground pad for thermal dissipation and electrical reference.
The PIC24FJ128GB412T-I/BG operates from 2.0V to 3.6V. For USB OTG applications, provide a dedicated 3.3V LDO for VUSB with adequate bulk capacitance (4.7-10 uF) per the USB 2.0 specification. For battery applications, the eXtreme Low Power modes (Sleep, Deep Sleep, VBAT) draw under 1 uA but require careful sequencing - the RTCC and/or WDT can wake the device from deep sleep on a programmed interval. Estimated battery life with CR2032 (220 mAh) at 1 uA sleep with 1 wake per minute is approximately 5-7 years, depending on active-mode duty cycle.
Several pitfalls are documented in Microchip application notes: (1) All VDD/VSS balls must be soldered - any open power ball causes erratic operation; (2) ICSP programming requires a dedicated PGECx/PGEDx pair - if PGEC2 is used for ICSPCLK, ICSPDAT must connect to PGED2 (not PGED1); (3) The dual-partition Flash requires bootloader coordination between Boot and App partitions during OTA updates - incorrect partition switching can brick the device; (4) Hardware crypto engine requires initialization per the crypto library - it does not auto-accelerate user crypto calls; (5) PPS must be unlocked before peripheral remapping and locked afterward to prevent runaway writes.
USB OTG signal integrity on the PIC24FJ128GB412T-I/BG requires 90 ohm differential impedance on D+/D- traces, with matched length (within 150 mil) per USB 2.0 spec. Place the ESD protection array within 5 mm of the USB connector. For applications using the segment-LCD driver, route LCD segment and common lines with adequate spacing to prevent cross-talk, and place the LCD bias capacitors (typically 1 uF on each VLCD pin) close to the package. The analog ADC inputs (AN0-AN15) benefit from dedicated ground isolation and a low-pass RC filter at each input for high-impedance sensor sources.
Compliance Information
RoHS and REACH compliant per Microchip product page. Industrial -40 C to +85 C temperature grade; not AEC-Q100 qualified for automotive (use PIC24FJxxx-Q1 variants for automotive). Halogen-free per Microchip packaging specifications.
