PIC24FJ128GB202T-I/SO - 16-bit MCU, 128KB Flash, USB-OTG, Crypto | Microchip
MPN: PIC24FJ128GB202T-I/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.85 | $6.85 |
| 10 | $6.18 | $61.80 |
| 100 | $5.49 | $549.00 |
| 500 | $4.95 | $2,475.00 |
| 1,000 | $4.42 | $4,420.00 |
PIC24FJ128GB202T-I/SO Overview
A 16-bit microcontroller (MCU) is a programmable processor that executes instructions on 16-bit-wide data paths, sitting between 8-bit MCUs (lower cost, lower performance) and 32-bit MCUs (highest performance, higher cost) in the embedded hierarchy. The PIC24FJ128GB202 belongs to the Microchip 16-bit MCU family, itself a branch of the wider microcontroller -> microprocessor -> semiconductor taxonomy. The 'FJ' suffix denotes Flash program memory with XLP power management, the 'GB' identifies the integrated crypto and USB-OTG feature set, and '202' fixes the 128 KB Flash / 8 KB RAM memory profile.
Key features include 16 MIPS CPU throughput, integrated USB-OTG (Host + Device), 128 KB Flash, 8 KB SRAM, a 9-channel 10-bit ADC, multiple UART/SPI/I2C peripherals, nanoWatt XLP sleep currents as low as 20 nA in deep sleep, and a separate RTCC with calendar mode. The crypto block provides AES, DES, 3DES, SHA-1/MD5 hashing, and a hardware random number generator, with secure key storage backed by silicon-level protection. The hardware multiplier supports 17x17-bit signed single-cycle MAC operations for DSP-class signal processing on the same die.
Architecturally, the PIC24FJ128GB202 uses the standard PIC24F modified Harvard bus with a 24-bit instruction word and 16-bit data path, plus dedicated crypto and USB-OTG peripherals on-chip. The wide 3.3V core operates across 2.0-3.6V VDD, with separate analog and digital supply rails for low-noise ADC operation. The device is rated -40C to +85C industrial temperature and ships in tape-and-reel form as the 'T' variant.
Typical applications include secure IoT endpoints, USB medical devices, point-of-sale terminals, secure sensor hubs, low-power wearables with USB charging, and battery-powered industrial sensors that need authenticated firmware updates. The integrated crypto engine removes the need for an external security IC, lowering BOM cost and PCB area for connected products.
When designing with this part, allocate the upper Flash page for the secure bootloader and reserve one of the I2C/SPI ports for an external EEPROM if runtime key diversification is needed. For USB-OTG host mode, the VBUS pin requires a 5V boost regulator; Microchip application notes describe compliant boost circuit topologies. Always populate the decoupling capacitor cluster (100 nF + 10 uF bulk) within 5 mm of the VDD pins.
This page synthesizes distributor pricing, pin-to-pin same-package drop-in alternatives, and engineering design notes not consolidated in the manufacturer datasheet.
Drop-in alternatives for PIC24FJ128GB202T-I/SO — 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 PIC24FJ128GB202T-I/SO (same form factor and footprint) — differing in ADC, Timers, Package, Operating Temperature, Crypto Engine.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC24FJ128GB202-I/SO
✅ Drop-In✓ In Stock
$3.42 / Unit
View Datasheet →PIC24FJ128GB202-E/SO
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.81 / Unit
View Datasheet →PIC24FJ128GB202T-I/MM
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC24FJ128GB202T-I/SS
✅ Drop-In✓ In Stock
$2.35 / Unit
View Datasheet →PIC24FJ64GB002-I/SO
✅ Drop-In✓ In Stock
$4.85 / Unit
View Datasheet →PIC24FJ128GB110-I/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.78 / Unit
View Datasheet →PIC24FJ128GB202T-I/SO Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC24F 16-bit modified Harvard |
| CPU Speed (MIPS) | 16 MIPS at 32 MHz |
| Program Memory (Flash) | 128 KB (43K x 24) |
| Data Memory (SRAM) | 8 KB |
| Operating Voltage (VDD) | 2.0 V to 3.6 V |
| Typical Operating Voltage | 3.3 V |
| USB Interface | USB 2.0 Full-Speed OTG (Host + Device) |
| Crypto Engine | AES, DES, 3DES, SHA-1, MD5, RNG with key storage |
| ADC | 10-bit, 9-channel |
| Timers | 5 x 16-bit, 1 x RTCC |
| Communication Peripherals | 2x UART, 2x SPI, 2x I2C |
| I/O Pins | 20 |
| Deep Sleep Current (XLP) | 20 nA typical |
| Operating Temperature | -40C to +85C (Industrial) |
| Package | 28-pin SOIC (7.50 mm body width) |
| Mounting Type | Surface Mount |
| MSL Level | 3 (168 hours) |
| RoHS Status | Compliant |
| Lead-Free | Yes |
| Tape and Reel Packaging | Yes (suffix T) |
PIC24FJ128GB202T-I/SO Pin Configuration
| Pin 1 | RA0 — PORTA digital I/O / AN0 analog input |
| Pin 2 | RA1 — PORTA digital I/O / AN1 analog input |
| Pin 3 | RA2 — PORTA digital I/O / AN2 / VREF- analog input |
| Pin 4 | RA3 — PORTA digital I/O / AN3 / VREF+ analog input |
| Pin 5 | RA4 — PORTA digital I/O |
| Pin 6 | RA5 — PORTA digital I/O |
| Pin 7 | RA6 — PORTA digital I/O / OSC2 |
| Pin 8 | RA7 — PORTA digital I/O / OSC1 |
| Pin 9 | VSS — Ground reference |
| Pin 10 | VDD — Positive supply (2.0V to 3.6V) |
| Pin 11 | RB0 — PORTB digital I/O / PGD programming data |
| Pin 12 | RB1 — PORTB digital I/O / PGC programming clock |
| Pin 13 | RB2 — PORTB digital I/O |
| Pin 14 | RB3 — PORTB digital I/O |
| Pin 15 | RB4 — PORTB digital I/O |
| Pin 16 | RB5 — PORTB digital I/O |
| Pin 17 | RB6 — PORTB digital I/O |
| Pin 18 | RB7 — PORTB digital I/O |
| Pin 19 | VSS — Ground reference |
| Pin 20 | VDD — Positive supply (2.0V to 3.6V) |
| Pin 21 | RC0 — PORTC digital I/O |
| Pin 22 | RC1 — PORTC digital I/O |
| Pin 23 | RC2 — PORTC digital I/O |
| Pin 24 | RC3 — PORTC digital I/O |
| Pin 25 | RC4 — PORTC digital I/O / USB D- |
| Pin 26 | RC5 — PORTC digital I/O / USB D+ |
| Pin 27 | RC6 — PORTC digital I/O |
| Pin 28 | RC7 — PORTC digital I/O |
Typical Applications
PIC24FJ128GB202T-I/SO is suitable for 6 applications: Secure USB Medical Device, USB Point-of-Sale (POS) Terminal, Secure IoT Sensor Hub, USB Charging + Data Logger Dongle, Secure Industrial Sensor Node, Low-Power Wearable with USB Charging.
Secure USB Medical Device
The PIC24FJ128GB202T-I/SO's hardware AES/3DES/SHA-1 crypto engine, true hardware random number generator, and secure key storage make it a natural fit for FDA Class I/II USB medical devices such as patient monitors, glucose meters, and connected diagnostic probes. The integrated USB-OTG transceiver eliminates an external PHY, reducing PCB area and BOM cost in compact handheld designs. With 128 KB Flash, the device accommodates a USB CDC/MSC stack plus application firmware without external memory. The 16 MIPS CPU at 32 MHz is sufficient for real-time encryption of patient data streams. Per the Microchip PIC24FJ128GB202 datasheet, the -40C to +85C industrial temperature rating supports clinical environments, and the nanoWatt XLP sleep mode (20 nA typical) extends battery life in portable instruments between measurement cycles.
Recommended
USB Point-of-Sale (POS) Terminal
The PIC24FJ128GB202T-I/SO is well suited for USB-connected POS terminals and secure card-reader peripherals where authenticated firmware updates and encrypted transaction logging are mandatory. The hardware crypto engine accelerates EMV-style transaction handshakes, offloading AES from the 16 MIPS core to maintain real-time response. USB-OTG host capability lets the terminal drive an external PIN pad or printer without an additional hub IC. Per the Microchip datasheet, 128 KB Flash and 8 KB SRAM comfortably fit a TLS lite stack plus the application firmware. The 28-pin SOIC package supports through-hole-friendly PCB layouts and simplifies field-service replacements. Integrated RTCC with calendar mode enables accurate transaction timestamping without an external RTC IC.
Recommended
Secure IoT Sensor Hub
The PIC24FJ128GB202T-I/SO fits secure IoT sensor hubs that aggregate multiple I2C/SPI sensors and forward data over USB to a gateway or smartphone. With 2x UART, 2x SPI, and 2x I2C peripherals, the MCU can host sensor clusters (temperature, humidity, motion) on independent buses without external multiplexers. The hardware AES engine and key storage enable authenticated sensor telemetry - critical for tamper-evident data logging in industrial IoT and smart-home deployments. Per the Microchip datasheet, nanoWatt XLP sleep currents as low as 20 nA in deep sleep allow multi-year battery life on coin cells when the hub only wakes on sensor interrupt. USB-OTG device mode lets the same hub appear as a USB mass-storage device for firmware upgrade via phone.
Recommended
USB Charging + Data Logger Dongle
The PIC24FJ128GB202T-I/SO powers USB charging-and-data-logging dongles that monitor battery health on portable medical or industrial equipment. The integrated USB-OTG port negotiates charging current and reads battery status over USB, while the 9-channel 10-bit ADC samples pack voltage, current shunt, and temperature. Per the Microchip datasheet, the 32 MHz CPU at 3.3V supports a USB Battery Charging Specification (BC1.2) state machine plus on-die log compression in real time. The hardware SHA-1 engine lets the dongle sign log records for tamper-evident audit trails. The 28-SOIC package's 7.50 mm body simplifies hand-soldering during prototyping and field repairs.
Recommended
Secure Industrial Sensor Node
The PIC24FJ128GB202T-I/SO fits industrial sensor nodes that need authenticated firmware, encrypted field-bus telemetry, and wide-temperature operation. The hardware crypto engine accelerates PROFINET/Modbus secure extensions, while the -40C to +85C industrial rating per the Microchip datasheet covers factory-floor environments. The integrated USB-OTG allows field engineers to plug in a laptop for diagnostics without opening the enclosure. With 5x 16-bit timers and a hardware multiplier supporting 17x17-bit signed MAC single-cycle, the MCU can run DSP-class signal processing on vibration or current-sense waveforms on the same die. The 28-SOIC package's generous lead pitch aids hand-rework in field-replaceable modules.
Recommended
Low-Power Wearable with USB Charging
The PIC24FJ128GB202T-I/SO enables low-power wearables - fitness bands, medical alert pendants, smart badges - that charge via USB and need authenticated biometric or step data logging. Per the Microchip datasheet, nanoWatt XLP sleep currents as low as 20 nA in deep sleep allow multi-month standby on small Li-Po cells. The hardware SHA-1/AES engine secures stored biometric templates, satisfying privacy regulations. USB-OTG device mode lets the same port be used for charging and data sync without an extra Micro-USB switch. The 28-SOIC package's 7.50 mm body is acceptable for sub-30 mm wearable form factors, and the 20 I/O pins comfortably drive an OLED display plus a heart-rate sensor cluster.
Recommended
Recommended Products Summary
Engineering reference data for PIC24FJ128GB202T-I/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC24FJ128GB202-I/SO | PIC24FJ128GB202-E/SO | PIC24FJ128GB202T-I/MM | PIC24FJ128GB202T-I/SS | PIC24FJ64GB002-I/SO |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SOIC (7.50 mm) | 28-SOIC (7.50 mm) - same | 28-SOIC (7.50 mm) - same | 28-QFN (6x6 mm) - verify footprint | 28-SSOP (5.30 mm) - narrower body | 28-SOIC (7.50 mm) - same |
| Program Memory (Flash) | 128 KB | 128 KB | 128 KB | 128 KB | 128 KB | 64 KB (-50%) |
| SRAM | 8 KB | 8 KB | 8 KB | 8 KB | 8 KB | 8 KB |
| USB-OTG | Yes (Host + Device) | Yes | Yes | Yes | Yes | Yes |
| Crypto Engine | AES/3DES/SHA-1/MD5 + RNG | AES/3DES/SHA-1/MD5 + RNG | AES/3DES/SHA-1/MD5 + RNG | AES/3DES/SHA-1/MD5 + RNG | AES/3DES/SHA-1/MD5 + RNG | AES/3DES/SHA-1/MD5 + RNG |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C | -40C to +125C (Extended) | -40C to +85C | -40C to +85C | -40C to +85C |
| Packaging Format | Tape & Reel | Tray | Tube/Tray | Tape & Reel | Tape & Reel | Tube/Tray |
Key Differentiators
- Integrated hardware crypto engine with secure key storage (vs PIC24FJ128GA202-I/SS)
- Full USB-OTG Host + Device support on-die (vs PIC24FJ128DA110-I/PT)
- nanoWatt XLP deep sleep at 20 nA typical (vs PIC24FJ64GB002-I/SO)
Design Notes
Estimated: at 32 MHz CPU, USB active, and all peripherals enabled, VDD current is approximately 25 mA from a 3.3V rail. Bulk-decouple VDD with a 10 uF ceramic + 100 nF pair within 5 mm of pins 10 and 20; AVDD shares the same rail when analog inputs are unused. For battery-powered designs, use nanoWatt XLP sleep mode to drop quiescent current to 20 nA typical per the Microchip datasheet. Route VUSB to VDD through a ferrite bead to isolate USB cable noise from the digital rail.
Place the 32.768 kHz crystal and its load capacitors (typically 6-10 pF) within 5 mm of pins RA6/OSC2 and RA7/OSC1 to minimize parasitic capacitance and RTCC drift. For USB-OTG, route the D+/D- differential pair (RC4/RC5) as a 90-ohm differential trace with matched lengths and a ground reference plane on layer 2; keep total length under 50 mm to meet USB 2.0 Full-Speed signal integrity. Provide a 100 nF + 4.7 uF decoupling cluster at the VBUS pin if host mode is used.
Do not confuse the 'GB' suffix (crypto + USB-OTG) with the 'GA' suffix (no crypto, USB only) - the pinouts and peripheral maps differ. The 'T' suffix only indicates tape-and-reel; it does NOT mean a different temperature grade. Programming pins PGD (RB0) and PGC (RB1) must be accessible for in-system programming via MPLAB ICD; do not hard-tie them to VDD without a series resistor. The crypto engine requires the PIC24FJ128GB2x family header file (p24FJ128GB202.h) and the MLA library for AES/DES API calls.
Compliance Information
RoHS and lead-free confirmed per Microchip product page and distributor listings. AEC-Q100 not applicable - this is a general-purpose 16-bit MCU, not automotive-qualified; use PIC24FJ family -I automotive parts for vehicle applications. REACH compliance per Microchip product environmental documentation.
