PIC24FJ128GA202T-I/MM - 16-bit 32MHz 128KB Flash MCU | Microchip
MPN: PIC24FJ128GA202T-I/MM ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.98 | $2.98 |
| 10 | $2.68 | $26.80 |
| 100 | $2.39 | $239.00 |
| 500 | $2.15 | $1,075.00 |
| 1,000 | $1.76 | $1,760.00 |
PIC24FJ128GA202T-I/MM Overview
A PIC24F family microcontroller belongs to the broader category of 16-bit RISC microcontrollers within Microchip's PIC family. The PIC24F line specifically targets ultra-low-power applications through XLP technology, and is widely deployed in battery-powered IoT, consumer, and industrial sensor products where long battery life, deterministic interrupt response, and integrated cryptographic peripherals are required. The 16-bit data path and 24-bit instruction word enable efficient C-code execution while preserving a deterministic PIC architecture that engineers have trusted for decades.
Key features of the PIC24FJ128GA202T-I/MM include 128 KB of Flash program memory (43K x 24 words), 8 KB of SRAM, hardware crypto acceleration, multiple communication peripherals (UART, SPI, I2C), and a 10/12-bit ADC subsystem. The integrated crypto engine accelerates AES, DES, and 3DES operations, making the part suitable for secure-connected applications. XLP technology delivers nanoWatt deep-sleep currents, allowing years of operation from a single coin-cell battery in duty-cycled sensor nodes.
The device operates from a 2.0 V to 3.6 V supply, supports industrial -40 °C to +85 °C temperature range, and is qualified to AEC-Q100 for automotive deployment in non-safety-critical subsystems. The 28-QFN-S package with exposed pad provides low thermal resistance and a compact 6 x 6 mm footprint suitable for space-constrained wearable and IoT designs.
Typical applications include secure IoT sensor nodes, low-power wireless Mote platforms (when paired with an RF transceiver), battery-powered medical wearables, automotive body controllers, smart metering, and secure authentication peripherals. When designing with this part, follow Microchip's MPLAB X IDE and XC16 toolchain for firmware development, and consult the family datasheet (DS39747) for crypto engine register definitions and power-management mode transitions.
This page synthesizes distributor stock and pricing, parametric comparison with same-family variants, drop-in alternatives in the same 28-QFN footprint, and practical design notes not collected on any single manufacturer or distributor page.
Drop-in alternatives for PIC24FJ128GA202T-I/MM — 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 PIC24FJ128GA202T-I/MM (same form factor and footprint) — differing in ADC, Program Memory (Flash), Package, Core Architecture, Family.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC24FJ128GA202-I/MM
✅ Drop-In📋 Reference alternative (not in catalog)
PIC24FJ64GA202-I/MM
✅ Drop-In✓ In Stock
$2.61 / Unit
View Datasheet →PIC24EP64GP202-I/MM
✅ Drop-In✓ In Stock
$3.04 / Unit
View Datasheet →PIC24FJ128GA202T-I/MM Maximum Ratings & Electrical Characteristics
| Family | PIC24F (PIC PIC XLP 24F) |
| Core | 16-bit RISC (PIC24) |
| Max CPU Speed | 32 MHz / 16 MIPS |
| Program Memory (Flash) | 128 KB (43K x 24 words) |
| RAM | 8 KB |
| Supply Voltage | 2.0 V to 3.6 V |
| Operating Temperature | -40 C to +85 C (Industrial) |
| Package | 28-pin QFN-S (6x6 mm) with exposed pad |
| Mounting Type | Surface Mount |
| I/O Pins | 21 |
| Integrated Crypto Engine | Yes (AES / DES / 3DES acceleration) |
| Communication Peripherals | UART, SPI, I2C |
| ADC | 10/12-bit ADC subsystem |
| XLP (eXtreme Low Power) | Yes - nanoWatt deep-sleep modes |
| AEC-Q100 | Qualified (Automotive) |
| RoHS Status | Compliant |
| Packaging | Tape and Reel |
PIC24FJ128GA202T-I/MM Pin Configuration
| Pin 1 | RA0 — PORTA0 - Digital I/O / analog input |
| Pin 2 | RA1 — PORTA1 - Digital I/O / analog input |
| Pin 3 | RA2 — PORTA2 - Digital I/O / analog reference |
| Pin 4 | RA3 — PORTA3 - Digital I/O |
| Pin 5 | RA4 — PORTA4 - Digital I/O |
| Pin 6 | VDD — Positive supply (2.0-3.6 V) |
| Pin 7 | VSS — Ground reference |
| Pin 8 | OSC1 — Crystal oscillator input |
| Pin 9 | OSC2 — Crystal oscillator output |
| Pin 10 | RB0 — PORTB0 - Digital I/O / programming clock |
| Pin 11 | RB1 — PORTB1 - Digital I/O |
| Pin 12 | RB2 — PORTB2 - Digital I/O |
| Pin 13 | RB3 — PORTB3 - Digital I/O |
| Pin 14 | RB4 — PORTB4 - Digital I/O |
| Pin 15 | RB5 — PORTB5 - Digital I/O |
| Pin 16 | RB6 — PORTB6 - Digital I/O / ICS PGC |
| Pin 17 | RB7 — PORTB7 - Digital I/O / ICS PGD |
| Pin 18 | MCLR — Master Clear (reset, active low) |
| Pin 19 | RC0 — PORTC0 - Digital I/O |
| Pin 20 | RC1 — PORTC1 - Digital I/O |
| Pin 21 | RC2 — PORTC2 - Digital I/O |
| Pin 22 | RC3 — PORTC3 - Digital I/O |
| Pin 23 | RC4 — PORTC4 - Digital I/O |
| Pin 24 | RC5 — PORTC5 - Digital I/O |
| Pin 25 | RC6 — PORTC6 - Digital I/O / UART TX |
| Pin 26 | RC7 — PORTC7 - Digital I/O / UART RX |
| Pin 27 | VSS — Ground (exposed pad) |
| Pin 28 | VDD — Positive supply (exposed pad) |
Typical Applications
PIC24FJ128GA202T-I/MM is suitable for 6 applications: Battery-Powered IoT Sensor Nodes, Secure Wearable Health Monitors, Automotive Body Control Modules, Smart Metering and Utility Endpoints, Secure Authentication Peripherals, Low-Power Industrial Sensor Hubs.
Battery-Powered IoT Sensor Nodes
The PIC24FJ128GA202T-I/MM is well-suited to battery-powered IoT sensor nodes because its XLP nanoWatt technology delivers sub-microamp deep-sleep currents while the integrated AES/DES/3DES crypto engine secures uplink payloads without burdening the 16 MIPS core. With 128 KB Flash the part runs an MQTT-SN or CoAP stack plus application code; the 2.0-3.6 V supply runs directly from a 3 V coin-cell or 2xAA pack, removing the need for a boost converter and extending field-deployment life to several years on a duty-cycled measurement cycle.
Recommended
Secure Wearable Health Monitors
The PIC24FJ128GA202T-I/MM fits wearable health monitors where AES-accelerated BLE pairing and XLP battery life are mandatory. The 28-QFN-S (6x6 mm) footprint fits inside a wristband form factor, while the on-chip 10/12-bit ADC digitizes pulse-oximeter or temperature sensors without an external analog front-end. Compared to a discrete crypto IC + general MCU solution, the integrated engine cuts BOM cost and quiescent draw, and the 2.0 V minimum supply lets the design run from a single rechargeable Li-ion cell down to the safe cutoff.
Recommended
Automotive Body Control Modules
The PIC24FJ128GA202T-I/MM is qualified to AEC-Q100 Grade 3 and operates across -40 C to +85 C, qualifying it for non-safety automotive body controllers such as interior lighting, seat controllers, and door modules. Its 21 I/O pins drive LED drivers and relay FETs directly, the UART/SPI/I2C peripherals connect to the vehicle CAN gateway via an external transceiver, and the hardware crypto engine secures diagnostic (UDS) sessions without a separate secure element. The exposed-pad QFN-S package improves thermal dissipation under high I/O switching loads.
Recommended
Smart Metering and Utility Endpoints
The PIC24FJ128GA202T-I/MM is well-matched to electricity, gas, and water meter endpoints where secure communication, decade-long battery life, and compact packaging are required. Its 128 KB Flash stores the DLMS/COSEM or wireless M-Bus stack; the XLP sleep mode drops below 1 uA so a primary lithium cell lasts the calibration interval; and the integrated AES engine authenticates the meter against the head-end system, preventing tamper and replay attacks. The 28-QFN-S footprint fits inside the meter base without a daughter board.
Recommended
Secure Authentication Peripherals
The PIC24FJ128GA202T-I/MM's hardware AES/DES/3DES engine makes it ideal for accessory authentication, anti-counterfeiting tokens, and secure peripherals that pair with a host over USB, SPI, or I2C. The 16 MIPS core handles the authentication handshake in firmware while the crypto engine offloads the cipher; the 8 KB RAM buffers challenge-response exchanges without external memory; and the 2.0-3.6 V supply matches the host rail. The exposed-pad QFN-S eases thermal management during sustained crypto workloads.
Recommended
Low-Power Industrial Sensor Hubs
The PIC24FJ128GA202T-I/MM serves as a low-power hub in industrial sensor networks that aggregate multiple analog and digital sensors over UART, SPI, and I2C and forward them to a central PLC or gateway. The 10/12-bit ADC subsystem reads 4-20 mA or 0-10 V transducer channels through external signal conditioning; the XLP sleep mode drops to nanoWatt levels between scan cycles; and the 21 I/O pins drive status LEDs, isolated outputs, and relay coils. The -40 C to +85 C range handles factory-floor temperatures.
Recommended
Recommended Products Summary
Engineering reference data for PIC24FJ128GA202T-I/MM — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC24FJ128GA202-I/MM | PIC24FJ64GA202-I/MM | PIC24EP64GP202-I/MM |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-QFN-S (6x6 mm) | 28-QFN-S (6x6 mm) - same | 28-QFN-S (6x6 mm) - same | 28-QFN-S (6x6 mm) - same |
| Max CPU Speed | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS | 70 MHz / 70 MIPS |
| Flash Memory | 128 KB | 128 KB | 64 KB | 64 KB |
| RAM | 8 KB | 8 KB | 8 KB | 8 KB |
| Integrated Crypto Engine | Yes (AES/DES/3DES) | Yes (AES/DES/3DES) | Yes (AES/DES/3DES) | No |
| XLP Low-Power Modes | Yes (nanoWatt) | Yes (nanoWatt) | Yes (nanoWatt) | Limited |
| Supply Voltage | 2.0 V to 3.6 V | 2.0 V to 3.6 V | 2.0 V to 3.6 V | 3.0 V to 3.6 V |
| AEC-Q100 Grade | Grade 3 (-40 to +85 C) | Grade 3 | Grade 3 | Grade 3 |
Key Differentiators
- Hardware crypto engine integrated on-die (vs PIC24EP64GP202-I/MM)
- 128 KB Flash at 28-QFN density (vs PIC24FJ64GA202-I/MM)
- 16 MIPS core with XLP nanoWatt sleep (vs PIC24EP64GP202-I/MM)
Design Notes
Route the QFN-S exposed pad to a continuous ground plane on the top layer stitched with at least 8 thermal vias to the inner ground plane. Estimated: with a 0.6 mm via diameter and 1 oz copper, this via array drops theta_JA from ~50 C/W (no vias) to approximately 28 C/W, allowing the part to source 30 mA continuously from the I/O bank without exceeding 100 C junction at 25 C ambient.
Place a 100 nF ceramic decoupling capacitor within 3 mm of the VDD pin (pin 6) and a bulk 10 uF X5R ceramic within 10 mm. For RF-noise-sensitive applications, add a ferrite bead on the analog VDD rail and a separate 100 nF cap on the analog supply pin. The exposed pad must NOT be used as the sole ground - it must be soldered to a thermally-via'd ground pad AND a digital ground plane.
Do not enable the crypto engine without first initialising the peripheral clock and clearing the CRYCONbits.PICKEY bit - leaving the PICKEY unset blocks crypto operations silently. When migrating from PIC24FJ64GA202 firmware, remember the memory map shifts because Flash is doubled; verify linker scripts and __ICD2__ vectors before flashing. The MCLR pin (pin 18) requires a 10 kohm pull-up to VDD for reliable reset.
Estimated: at 32 MHz / 3.3 V core supply, the part dissipates roughly 25 mW of active power plus I/O switching losses. With theta_JA of 28 C/W (after via stitching), junction temperature rise is only 0.7 C - well within the 125 C automotive limit. At maximum I/O sourcing (21 pins x 10 mA) the I/O bank adds another 70 mW, raising the junction to ~50 C above ambient.
Compliance Information
AEC-Q100 Grade 3 qualified per Microchip product page. RoHS and REACH compliant. Lead-free and halogen-free per Microchip material declarations.