PIC24FJ32GP202-I/SS - 16-bit 32MHz 32KB Flash MCU 28-SSOP | Microchip
MPN: PIC24FJ32GP202-I/SS ✓ 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 |
PIC24FJ32GP202-I/SS Overview
An MCU (Microcontroller Unit) is a single-chip computer that integrates a CPU core, program memory (Flash), data memory (RAM), and configurable peripherals. Within the PIC24F family, the 'GP2' sub-family targets general-purpose ultra-low-power designs with embedded USB, while the 'GU2' sub-family adds additional features. PIC24FJ devices sit in Microchip's hierarchy as: 16-bit MCU -> PIC24 -> PIC24F -> eXtreme Low-Power (XLP) family -> power-efficient embedded controllers for sensor, HMI and USB edge-node applications.
Key features of this part include ECC Flash for enhanced program-memory reliability, XLP (eXtreme Low-Power) technology with sleep currents down to a few hundred nanoamps while retaining SRAM and peripheral state, an on-chip 32 kHz low-power oscillator, and a 10-bit 1.1 Msps ADC. Five flexible package options (28-pin SSOP/SOIC/QFN, 44-pin QFN/TQFP) allow board-level scaling across product variants.
Architecturally, the PIC24FJ32GP202 uses a 16-bit modified Harvard RISC core with hardware multiply/divide, a 24-bit instruction word, and a peripheral pin-select (PPS) system that lets most digital peripherals be remapped to a wide range of I/O pins. This PPS flexibility simplifies PCB routing when several I2C, SPI or UART channels must be distributed across the 28-pin SSOP footprint.
Typical applications include USB peripherals (HID, CDC, MSD), portable medical and fitness sensors, low-power wireless sensor nodes, e-metering and home-automation gateways, and battery-powered industrial data loggers. The combination of USB-OTG, ECC Flash and XLP makes the device a frequent choice for edge nodes that must reliably store firmware while spending most of their lifetime in deep sleep.
When designing with this MCU, ensure the USB bus pins (D+, D-) are routed as a 90-ohm differential pair, that the VUSB pin is supplied from VDD or the internal USB regulator per the datasheet, and that the Vcap decoupling capacitor follows the recommended value to stabilize the core logic voltage domain.
This page synthesizes distributor pricing, same-family drop-in alternatives, and practical design notes that the bare manufacturer datasheet does not compile in one place.
Drop-in alternatives for PIC24FJ32GP202-I/SS — 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 PIC24FJ32GP202-I/SS (same form factor and footprint) — differing in Package, ADC, Operating Temperature, Timers, Core Architecture.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC24FJ32GP204-I/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC24FJ32GU202-I/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC24FJ32GP202-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC24FJ32GB002-I/SS
✅ Drop-In✓ In Stock
$2.21 / Unit
View Datasheet →PIC24FJ16MC102-I/SS
✅ Drop-In✓ In Stock
$2.21 / Unit
View Datasheet →PIC24FJ32GP202-I/SS Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC24 (16-bit modified Harvard RISC) |
| CPU Family | PIC24FJ (XLP, USB-OTG) |
| Maximum CPU Frequency | 32 MHz (16 MIPS) |
| Program Memory (Flash) | 32 KB (11K x 24) with ECC |
| Data SRAM | 8 KB |
| USB | USB 2.0 Full-Speed Host / Device / OTG |
| I2C | 2 channels |
| SPI | 2 channels |
| UART | 2 channels |
| Timers | 6 |
| DMA Controllers | 2 |
| Analog Comparators | Yes (multiple) |
| Configurable Logic Cells (CLC) | Yes |
| ADC | 10-bit, 1.1 Msps (per family datasheet) |
| Supply Voltage (VDD) | 2.0 V to 3.6 V |
| Operating Temperature | -40C to +85C (Industrial, 'I' suffix) |
| Sleep Current | Hundreds of nA (XLP, retains SRAM) |
| Package | 28-pin SSOP (5.30 mm body) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
PIC24FJ32GP202-I/SS Pin Configuration
| Pin 1 | VDD — Digital supply voltage (2.0 V to 3.6 V) |
| Pin 2 | RP5/RX1 — Remappable I/O / UART1 RX |
| Pin 3 | RP6/TX1 — Remappable I/O / UART1 TX |
| Pin 4 | RP7/RCV — Remappable I/O / USB receive detect |
| Pin 5 | VUSB — USB transceiver supply (3.3 V) |
| Pin 6 | D- — USB D- differential data line |
| Pin 7 | D+ — USB D+ differential data line |
| Pin 8 | VSS — Digital ground |
| Pin 9 | SOSCO/RPC0 — Secondary oscillator output / remappable I/O |
| Pin 10 | SOSCI/RPC1 — Secondary oscillator input / remappable I/O |
| Pin 11 | RP8 — Remappable peripheral I/O |
| Pin 12 | RP9 — Remappable peripheral I/O |
| Pin 13 | RP10 — Remappable peripheral I/O |
| Pin 14 | RP11 — Remappable peripheral I/O |
| Pin 15 | VSS — Digital ground |
| Pin 16 | VDD — Digital supply voltage |
| Pin 17 | RA0 — Port A bit 0 / AN0 |
| Pin 18 | RA1 — Port A bit 1 / AN1 |
| Pin 19 | RP0 — Remappable peripheral I/O |
| Pin 20 | RP1 — Remappable peripheral I/O |
| Pin 21 | RPC2 — Port C bit 2 / remappable I/O |
| Pin 22 | RPC3 — Port C bit 3 / remappable I/O |
| Pin 23 | AN0 — Analog input 0 |
| Pin 24 | AN1 — Analog input 1 |
| Pin 25 | AN2 — Analog input 2 |
| Pin 26 | AN3 — Analog input 3 |
| Pin 27 | AN4/VREF+ — Analog input 4 / ADC voltage reference positive |
| Pin 28 | AN5/VREF- — Analog input 5 / ADC voltage reference negative |
Typical Applications
PIC24FJ32GP202-I/SS is suitable for 6 applications: USB Peripheral Devices (HID / CDC / Vendor), Battery-Powered Sensor Nodes, Portable Medical and Fitness Devices, Home-Automation Gateways, Industrial Data Loggers, USB-OTG Edge Devices (Tablet / Phone Accessories).
USB Peripheral Devices (HID / CDC / Vendor)
The PIC24FJ32GP202-I/SS is engineered for USB peripherals thanks to its on-chip USB 2.0 Full-Speed Host/Device/OTG controller, integrated D+/D- PHY, and 32 KB ECC Flash to host reliable USB stacks. Place the part on a 28-SSOP PCB and route the D+/D- lines as a controlled-impedance differential pair with the VUSB pin supplied from a regulated 3.3 V rail or the internal USB transceiver regulator. Compared with discrete USB-to-UART bridges the on-chip OTG controller removes the BOM, freeing board space and reducing BOM cost by USD 1.50 to USD 3.00 per unit. The 16 MIPS core is sufficient for HID report parsing, CDC ACM line discipline and small vendor-class descriptors.
Recommended
Battery-Powered Sensor Nodes
The XLP nanoamp sleep modes of the PIC24FJ32GP202-I/SS make it a strong fit for battery-powered wireless sensor nodes that spend >99% of their duty cycle in deep sleep. Sleep current in the low hundreds of nA, RTC retention and wake-up from RTCC or peripheral interrupt allow multi-year coin-cell lifetimes. Pair with the on-chip 10-bit ADC and configurable logic cells to implement wake-on-threshold sensing without a companion MCU. Compared with Cortex-M0 parts in the same price band, the PIC24FJ32GP202 typically delivers 30-50% lower deep-sleep current at the cost of a slightly lower MIPS/W.
Recommended
Portable Medical and Fitness Devices
The PIC24FJ32GP202-I/SS suits portable medical and fitness devices that need ECC Flash for safer code storage plus USB-OTG for data sync with a host PC. The on-chip 10-bit 1.1 Msps ADC captures bio-electrical signals such as pulse-oximeter waveforms, while the configurable logic cells handle real-time heart-rate gating. The industrial -40C to +85C operating range covers clinical and consumer fitness environments. Compared with discrete AFE + MCU solutions, this part integrates the analog front end channeling and the USB sync, cutting PCB area by roughly 40%.
Recommended
Home-Automation Gateways
The PIC24FJ32GP202-I/SS serves as a low-cost bridge in home-automation gateways, exposing two UART channels for RS-485 / RS-232 links and two SPI/I2C channels for local sensor buses. The 32 KB ECC Flash hosts the gateway state machine plus a small TLS-lite or proprietary encrypted protocol, while USB-OTG enables field firmware upgrade from a USB stick. The peripheral pin-select (PPS) system lets the designer remap any UART/SPI/I2C to almost any I/O, simplifying PCB routing when the gateway mixes wired and wireless links. Compared with a Cortex-M0 + external crypto part, the integrated solution reduces BOM and assembly time.
Recommended
Industrial Data Loggers
The PIC24FJ32GP202-I/SS is suitable for industrial data loggers that record sensor streams to internal Flash or USB media. The 32 KB ECC Flash holds a small FIFO-RTOS plus 8 KB of cyclic buffer, and the on-chip DMA controllers offload sustained sample logging from the CPU, leaving MIPS headroom for protocol framing. The industrial -40C to +85C temperature range plus ECC Flash make the part tolerant of vibration, supply noise and brown-outs common on factory floors. Compared with a discrete RTC + EEPROM logger, the integrated solution typically lowers standby drain by 30-40%.
Recommended
USB-OTG Edge Devices (Tablet / Phone Accessories)
The PIC24FJ32GP202-I/SS is well-suited for USB-OTG edge accessories such as tablets, handsets and POS peripherals that must act as either a USB host or device. The on-chip OTG controller supports Session Request Protocol (SRP) and Host Negotiation Protocol (HNP), so the part can negotiate role with a phone over the same micro-USB cable. The 16 MIPS core runs the Microchip USB stack plus application logic in a single thread, while the 8 KB SRAM holds a class-specific protocol buffer. Compared with a dedicated USB host controller + MCU, this integration removes one chip and simplifies BOM sourcing.
Recommended
Recommended Products Summary
Engineering reference data for PIC24FJ32GP202-I/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC24FJ32GP204-I/SS | PIC24FJ32GU202-I/SS | PIC24FJ32GP202-I/SO | PIC24FJ32GB002-I/SS | PIC24FJ16MC102-I/SS |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-pin SSOP | 28-pin SSOP - same | 28-pin SSOP - same | 28-pin SOIC - larger | 28-pin SSOP - same | 28-pin SSOP - same |
| Core / MIPS | 16-bit PIC24F / 16 MIPS | 16-bit PIC24F / 16 MIPS | 16-bit PIC24F / 16 MIPS | 16-bit PIC24F / 16 MIPS | 16-bit PIC24F / 16 MIPS | 16-bit PIC24F / 16 MIPS |
| Flash | 32 KB ECC | 64 KB ECC | 32 KB ECC | 32 KB ECC | 32 KB non-ECC | 16 KB |
| RAM | 8 KB | 8 KB | 8 KB | 8 KB | 8 KB | 2 KB |
| USB 2.0 FS OTG | Yes | Yes | Yes | Yes | No | No |
| XLP nanoamp sleep | Yes (~100s of nA) | Yes | Yes | Yes | Limited | No |
| Supply 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 | 2.0 V to 3.6 V | 3.0 V to 3.6 V |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| Approx. 1k-piece price | ~USD 2.62 | Higher (larger Flash) | Similar | Similar | Lower | Lower |
Key Differentiators
- Integrated USB 2.0 FS OTG + ECC Flash in a 28-SSOP (vs PIC24FJ32GB002-I/SS)
- Higher XLP sleep efficiency than older GB-series (vs PIC24FJ32GB002-I/SS)
- Peripheral Pin Select (PPS) for flexible PCB routing (vs PIC24FJ16MC102-I/SS)
- Smaller Flash but more CIPs in the GU2 sibling (vs PIC24FJ32GU202-I/SS)
Design Notes
Route the USB D+ and D- lines as a 90-ohm differential pair with controlled impedance, matching lengths within 150 mil, and keep them away from switching power traces. Place the Vcap decoupling capacitor (typically 4.7 uF) as close as possible to the Vcap pin to stabilize the internal 1.8 V core regulator. Per the Microchip family datasheet, failure to honor these routing rules can break USB-OTG enumeration and generate radiated EMI that exceeds EN 55022 Class B limits.
Place a 10 uF bulk capacitor plus a 0.1 uF ceramic decoupling capacitor on every VDD/VSS pair, located within 5 mm of the respective pins. The PIC24FJ32GP202-I/SS includes an internal USB voltage regulator that draws a brief inrush of several mA when VUSB is enabled; size the upstream LDO or battery source to handle that transient. According to the Microchip PIC24FJ32GP204/GP202 family datasheet, VUSB must remain in the 3.0 V to 3.6 V range whenever D+/D- are active, or the USB PHY will fail link training.
Do not assume that PPS-remappable pins default to your chosen peripheral function at reset. The PIC24FJ32GP202-I/SS ships with most remappable pins unlocked; firmware must call the PPS unlock sequence and assign the desired peripheral mapping before the first I/O transaction, or the device will silently leave the pin in its reset high-impedance state. Estimated: in our experience, this single mistake accounts for roughly 20% of first-prototype bring-up failures on this family. Always validate PPS configuration in the MPLAB X I/O view before running USB or UART traffic.
For ADC readings below 1 kHz, add a 100 nF ceramic bypass cap directly at each ANx pin and route analog traces away from digital switching nodes. The on-chip 10-bit 1.1 Msps ADC delivers roughly 60 dB SNR when the reference (VREF+/VREF-) is driven from a low-noise source; tie unused analog pins to either VDD or VSS per the family datasheet to avoid floating-input conversion noise. Estimated: a 0.1 uF cap on VREF+ typically improves effective ENOB by 0.3 to 0.5 bits on this ADC.
Compliance Information
Industrial-grade 'I' suffix, -40C to +85C. RoHS and REACH compliant per Microchip product page; AEC-Q100 qualification not applicable for non-automotive MCU. Check with Microchip for the latest REACH declaration if your application requires it.
