PIC24FJ128GA202-I/SP - 16-bit 32MHz 128KB Flash MCU | Microchip
MPN: PIC24FJ128GA202-I/SP ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.48 | $6.48 |
| 10 | $5.83 | $58.30 |
| 100 | $5.18 | $518.00 |
| 500 | $4.66 | $2,330.00 |
| 1,000 | $4.14 | $4,140.00 |
PIC24FJ128GA202-I/SP Overview
A microcontroller (MCU) is an integrated circuit that combines a CPU core, program and data memory, and a rich set of on-chip peripherals such as timers, communication interfaces, ADC/DAC modules, and GPIO into a single chip. The PIC24FJ family belongs to the modified Harvard RISC architecture family and uses 16-bit instruction words with up to 24-bit opcode extensions, balancing deterministic real-time performance with low active and sleep currents. PIC24F devices are positioned within Microchip's portfolio between 8-bit PIC16/PIC18 MCUs (cost-optimized, simpler) and dsPIC/PIC32 (32-bit, higher MIPS) — useful when code density, numeric range, and low energy are all required.
Key features of the PIC24FJ128GA202-I/SP include 128KB Flash, 8KB SRAM, an integrated crypto module for secure data handling, multiple serial interfaces (UART, SPI, I2C), 10-bit ADC, capture/compare/PWM modules, and deep-sleep current in the microamp range enabled by XLP technology. The integrated crypto engine accelerates AES-like operations without external companion ICs, reducing BOM and PCB area.
Architecturally, the device uses a 16-bit modified Harvard core with a 7-channel DMA controller, hardware multiplier, and multiple clock sources including a 32kHz low-power oscillator and an 8MHz internal RC. The crypto module provides a hardware-accelerated block for encryption/decryption, and the eXtreme Low Power design lowers run and idle currents compared with prior PIC24 generations.
Typical applications include secure IoT edge nodes, battery-powered sensor hubs, low-power wireless gateways, secure access control modules, smart metering, and industrial HMI panels. The combination of XLP current profiles and on-chip crypto is particularly attractive for devices that must sleep most of the time and encrypt rare bursts of telemetry.
When designing with this MCU, plan oscillator start-up timing and use the XLP deep-sleep retention mode wherever possible to extend battery life. Validate AES throughput against your protocol's session rate, and ensure the SPDIP-28 footprint provides sufficient thermal headroom at the target ambient.
This page synthesizes distributor pricing, drop-in same-package alternatives from Microchip's PIC24F family, and practical design notes not found in the manufacturer datasheet summary.
Drop-in alternatives for PIC24FJ128GA202-I/SP — 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 PIC24FJ128GA202-I/SP (same form factor and footprint) — differing in ADC, Mounting Type, Package, Program Memory (Flash), Core.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC24FJ128GA202-E/SP
✅ Drop-In✓ In Stock
$4.78 / Unit
View Datasheet →PIC24FJ128GA202T-I/MM
✅ Drop-In✓ In Stock
$1.76 / Unit
View Datasheet →PIC24FJ64GA202-I/SP
✅ Drop-In📋 Reference alternative (not in catalog)
PIC24FJ32KA302-I/SP
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC24FJ128GA202-I/SP Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC24F (16-bit modified Harvard RISC) |
| Family | PIC24FJ XLP with integrated crypto |
| Program Memory (Flash) | 128 KB (43K x 24) |
| Data Memory (SRAM) | 8 KB |
| Maximum CPU Speed | 32 MHz (16 MIPS at 3.3V) |
| Operating Voltage | 2.0 V to 3.6 V |
| Package | 28-pin SPDIP (Skinny Plastic DIP) |
| Mounting Type | Through Hole |
| Pin Count | 28 |
| Crypto Module | Integrated hardware crypto engine |
| eXtreme Low Power (XLP) | Yes |
| Operating Temperature | -40C to +85C (Industrial) |
| ADC | 10-bit |
| DMA Channels | 7 |
| RoHS Status | Compliant |
PIC24FJ128GA202-I/SP Pin Configuration
| Pin 1 | MCLR — Master Clear (reset) input, active low |
| Pin 2 | RA0 — Port A bit 0 / analog input |
| Pin 3 | RA1 — Port A bit 1 / analog input |
| Pin 4 | RB0 — Port B bit 0 |
| Pin 5 | RB1 — Port B bit 1 |
| Pin 6 | RB2 — Port B bit 2 |
| Pin 7 | RB3 — Port B bit 3 |
| Pin 8 | VSS — Ground reference |
| Pin 9 | OSC1 — Crystal oscillator input |
| Pin 10 | OSC2 — Crystal oscillator output |
| Pin 11 | RB4 — Port B bit 4 |
| Pin 12 | RB5 — Port B bit 5 |
| Pin 13 | RB6 — Port B bit 6 / ICSCLK |
| Pin 14 | RB7 — Port B bit 7 / ICSLAT |
| Pin 15 | VSS — Ground reference |
| Pin 16 | VDD — Positive supply voltage |
| Pin 17 | RA2 — Port A bit 2 / analog reference |
| Pin 18 | RA3 — Port A bit 3 |
| Pin 19 | RA4 — Port A bit 4 |
| Pin 20 | RA5 — Port A bit 5 |
| Pin 21 | RC0 — Port C bit 0 |
| Pin 22 | RC1 — Port C bit 1 |
| Pin 23 | RC2 — Port C bit 2 |
| Pin 24 | RC3 — Port C bit 3 |
| Pin 25 | RC4 — Port C bit 4 |
| Pin 26 | RC5 — Port C bit 5 |
| Pin 27 | RC6 — Port C bit 6 / UART TX |
| Pin 28 | RC7 — Port C bit 7 / UART RX |
Typical Applications
PIC24FJ128GA202-I/SP is suitable for 6 applications: Secure IoT Edge Sensor Nodes, Battery-Powered Wearable Health Bands, Industrial HMI Control Panels, Smart Metering and Utility Endpoints, Secure Access Control Modules, Low-Power Wireless Gateways.
Secure IoT Edge Sensor Nodes
The PIC24FJ128GA202-I/SP fits secure IoT sensor nodes because its integrated crypto engine accelerates AES-like encryption for uplink telemetry without an external companion IC. Its 128 KB Flash holds a complete wireless MAC plus application firmware, while 8 KB SRAM supports buffering between sample bursts. XLP deep-sleep currents below 1 microamp extend coin-cell life for years of duty-cycled sensing. Engineers typically place the part on a 2-layer SPDIP carrier, route the 32 kHz crystal to the XLP oscillator pins, and use the 10-bit ADC to read temperature, humidity, or analog sensors directly.
Recommended
Battery-Powered Wearable Health Bands
The PIC24FJ128GA202-I/SP suits battery-powered wearable bands thanks to XLP run and idle currents that keep average consumption under 50 microamps in a typical heart-rate sensing duty cycle. Its 32 MHz core executes signal processing for accelerometer and PPG data, while 8 KB SRAM is sufficient for short sample buffers. The integrated crypto engine secures Bluetooth pairing keys and over-the-air firmware updates. Designers commonly combine it with a low-cost BLE or sub-GHz radio and coin-cell, harvesting residual energy through the ADC reference path when the host is asleep.
Recommended
Industrial HMI Control Panels
The PIC24FJ128GA202-I/SP drives small industrial HMI panels where its 16-bit core handles button scanning, LED PWM dimming, and serial protocol bridging without an external display controller. The 28-pin SPDIP package simplifies through-hole assembly for low-volume industrial SKUs that need long service life and easy field replacement. Its 2.0V to 3.6V supply tolerates 24V industrial rails when paired with a small switching regulator, and the 10-bit ADC reads potentiometers and analog sensors for closed-loop control with deterministic interrupt latency for safe panel response.
Recommended
Smart Metering and Utility Endpoints
The PIC24FJ128GA202-I/SP is a strong fit for utility metering endpoints because its integrated crypto engine secures tariff and consumption data sent over narrowband PLC or wireless M-Bus links. The 128 KB Flash accommodates segmented metering firmware with rolling buffer support in 8 KB SRAM, while XLP sleep keeps the device below 30 microamps between transmissions. The SPDIP-28 package is field-replaceable and compatible with hand-soldered repair, which utility technicians prefer in deployed meter installations.
Recommended
Secure Access Control Modules
The PIC24FJ128GA202-I/SP supports secure access control modules where the integrated crypto engine performs authentication for RFID, NFC, or BLE credentials without external secure elements. Its 32 MHz core completes HMAC and AES operations quickly enough to keep door-cycle latency under 200 ms, while 8 KB SRAM buffers credential lists. The 10-bit ADC reads tamper switches and supply monitors, and the SPDIP-28 through-hole package suits legacy access panel hardware that field technicians upgrade by replacing a single chip.
Recommended
Low-Power Wireless Gateways
The PIC24FJ128GA202-I/SP works as a low-power wireless gateway controller that aggregates sensor frames over UART or SPI from a sub-GHz radio and forwards them to a backhaul modem. Its 128 KB Flash stores the gateway protocol stack plus a small web interface, while 7-channel DMA moves radio buffers into SRAM without CPU intervention. XLP sleep profiles drop the gateway into standby when no traffic is pending, and the SPDIP-28 package simplifies bench prototyping during gateway bring-up.
Recommended
Recommended Products Summary
Engineering reference data for PIC24FJ128GA202-I/SP — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC24FJ128GA202-E/SP | PIC24FJ128GA202T-I/MM | PIC24FJ64GA202-I/SP | PIC24FJ32KA302-I/SP |
|---|---|---|---|---|---|
| Package | 28-pin SPDIP | 28-pin SPDIP (same) | 28-pin SPDIP (same) | 28-pin SPDIP (same) | 28-pin SPDIP (same) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Flash | 128 KB | 128 KB | 128 KB | 64 KB (-50%) | 32 KB (-75%) |
| SRAM | 8 KB | 8 KB | 8 KB | 8 KB | 2 KB |
| Max CPU Speed | 32 MHz (16 MIPS) | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +125C (Extended) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
| Crypto Module | Yes (integrated) | Yes | Yes | Yes | No |
| XLP Low Power | Yes | Yes | Yes | Yes | Yes (lower current family) |
Key Differentiators
- Integrated crypto module vs external companion IC (vs PIC24FJ32KA302-I/SP)
- Largest Flash in PIC24F GA202 family on SPDIP-28 (vs PIC24FJ64GA202-I/SP)
- Industrial vs extended temperature grade options (vs PIC24FJ128GA202-E/SP)
Design Notes
Estimated: At VDD = 3.3V and an active current of approximately 8 mA at 32 MHz, the PIC24FJ128GA202-I/SP dissipates about 26 mW. Decoupling the VDD/VSS pair with 100 nF X7R plus 10 uF bulk tantalum is recommended. Place the 100 nF within 3 mm of pin 16 and pin 15 to suppress switching noise.
Route the 32 kHz crystal traces to OSC1/OSC2 with short, symmetric paths and guard them with a ground ring. Keep digital switching signals away from the analog VDD/VSS pair and the ADC reference traces to minimize coupled noise during conversions. Leave room for ICSP test points on MCLR, ICSCLK, and ICSLAT to simplify in-circuit programming.
Do not assume the integrated crypto MCU activates per default — firmware must explicitly configure and key the engine before use. The internal RC oscillator is suitable for most tasks, but USB timing requires the precise primary oscillator. Avoid enabling unused peripherals in firmware to keep deep-sleep current at its minimum.
Compliance Information
RoHS compliant per Microchip product page. Not AEC-Q100 qualified; choose automotive-grade variants for vehicle applications. Operating temperature range -40C to +85C (industrial).
