PIC24F16KA102-I/SS - 16-bit XLP MCU 16KB Flash 28-SSOP | Microchip
MPN: PIC24F16KA102-I/SS ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.42 | $3.42 |
| 10 | $3.05 | $30.50 |
| 100 | $2.62 | $262.00 |
| 500 | $2.3 | $1,150.00 |
| 1,000 | $2.05 | $2,050.00 |
PIC24F16KA102-I/SS Overview
A PIC24 microcontroller is a 16-bit modified Harvard architecture MCU from Microchip's PIC24F family, sitting between the 8-bit PIC16/PIC18 families and the 32-bit PIC32MX devices in the product hierarchy. PIC24F devices use a wide 16-bit instruction set with DSP-friendly instructions, hardware multiply/divide, and a peripheral set oriented toward motor control and low-power sensing. The 'F' suffix denotes Flash program memory and 3.3V-class operation. The XLP technology adds deep-sleep current as low as 20 nA with retention, plus peripherals like DSBOR (deep-sleep brown-out reset), DSWDT (deep-sleep watchdog timer), and RTCC (real-time clock calendar) that remain active in sleep.
Key features of this part include the 16KB (5.5K x 24) Flash program memory, 19 GPIO pins with remappable peripherals (PPS), 12-bit ADC with up to 9 channels, multiple UART/SPI/I2C interfaces, 5 16-bit timers, and a real-time clock calendar. The XLP deep-sleep current is typically under 20 nA with full SRAM retention, while run current at 32MHz/3.3V is around 8 mA. The 28-SSOP footprint has a thermal resistance of approximately 71 C/W and supports hand-soldering plus standard reflow profiles.
The architecture uses a modified Harvard bus with separate program and data paths, a 24-bit instruction word, and a 16-bit data path. The MIPS-style instruction set executes most instructions in one cycle. Integrated peripherals like comparators, 10-bit DAC, and CTMU (Charge Time Measurement Unit) enable touch sensing and slope-compensation without external ICs.
Typical applications include battery-powered IoT sensor nodes, wearable health monitors, remote controls, wireless metering, HVAC thermostats, and energy harvesting systems where sleep current dominates battery life. The 28-SSOP package allows breadboard-friendly hand assembly while remaining suitable for automated SMT lines. The wide operating voltage also enables direct Li-ion battery connection at 3.6V maximum.
When designing with this MCU, prioritize the deep-sleep current budget over active performance; the XLP features only deliver their value when peripherals are properly switched off and unused clocks are gated. Use the PPS peripheral remapping to route signals to any GPIO, simplifying PCB layout. Always confirm that the active peripherals draw less than the wake-up event cost in duty-cycled applications.
This page synthesizes Microchip datasheet values, current distributor pricing, and drop-in alternatives to the 28-SSOP footprint, information typically scattered across the datasheet, parametric tables, and XAIPART cross-reference data.
Drop-in alternatives for PIC24F16KA102-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 PIC24F16KA102-I/SS (same form factor and footprint) — differing in Package, Operating Temperature, ADC, Program Memory (Flash), Timers.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC24F08KA102-I/SS
✅ Drop-In✓ In Stock
$2.05 / Unit
View Datasheet →PIC24F16KA102-E/SS
✅ Drop-In✓ In Stock
$2.08 / Unit
View Datasheet →PIC24F16KA102-I/SO
✅ Drop-In✓ In Stock
$2.52 / Unit
View Datasheet →PIC24F08KL302-I/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC24F16KL402-I/SS
✅ Drop-In✓ In Stock
$1.78 / Unit
View Datasheet →PIC24F16KA101-I/SS
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.74 / Unit
View Datasheet →PIC24F16KA102-I/SS Maximum Ratings & Electrical Characteristics
| Core | PIC24F (16-bit modified Harvard) |
| Program Memory | 16 KB Flash (5.5K x 24) |
| Data RAM | 2 KB |
| EEPROM | 512 B |
| Maximum CPU Speed | 32 MHz (16 MIPS) |
| Supply Voltage Range | 1.8 V to 3.6 V |
| I/O Pins | 19 |
| ADC | 12-bit, up to 9 channels |
| Timers | 5 x 16-bit |
| Communication | UART, SPI, I2C |
| Operating Temperature | -40 C to +85 C (Industrial) |
| Package | 28-pin SSOP (5.30 mm body) |
| Mounting Type | Surface Mount |
| MSL Level | 1 |
| RoHS Status | Compliant |
| Peripheral Features | DSBOR, DSWDT, RTCC, CTMU, 10-bit DAC |
PIC24F16KA102-I/SS Pin Configuration
| Pin 1 | MCLR — Master Clear (reset) input, active low |
| Pin 2 | RA0 — GPIO / analog input AN0 |
| Pin 3 | RA1 — GPIO / analog input AN1 |
| Pin 4 | RB0 — GPIO / PGED1 programming |
| Pin 5 | RB1 — GPIO / PGEC1 programming |
| Pin 6 | RB2 — GPIO / analog input AN2 |
| Pin 7 | RB3 — GPIO / analog input AN3 |
| Pin 8 | VSS — Ground reference |
| Pin 9 | RA2 — GPIO / analog input AN4 |
| Pin 10 | RA3 — GPIO / analog input AN5 |
| Pin 11 | RB4 — GPIO / analog input AN6 |
| Pin 12 | RB5 — GPIO / analog input AN7 |
| Pin 13 | RB6 — GPIO / ICS PGC |
| Pin 14 | RB7 — GPIO / ICS PGD |
| Pin 15 | VSS — Ground reference |
| Pin 16 | VDD — Positive supply voltage |
| Pin 17 | RA4 — GPIO / analog input AN8 |
| Pin 18 | RA5 — GPIO / analog input AN9 / VREF+ |
| Pin 19 | RA6 — GPIO / oscillator output |
| Pin 20 | RA7 — GPIO / oscillator input |
| Pin 21 | RC0 — GPIO |
| Pin 22 | RC1 — GPIO |
| Pin 23 | RC2 — GPIO |
| Pin 24 | RC3 — GPIO |
| Pin 25 | RC4 — GPIO |
| Pin 26 | RC5 — GPIO |
| Pin 27 | RC6 — GPIO |
| Pin 28 | RC7 — GPIO |
Typical Applications
PIC24F16KA102-I/SS is suitable for 6 applications: Battery-Powered IoT Sensor Node, Wearable Health Monitor, Wireless Remote Control, Smart HVAC Thermostat, Smart Metering Endpoint, Industrial Sensor Hub.
Battery-Powered IoT Sensor Node
The PIC24F16KA102-I/SS is ideal for battery-powered IoT sensor nodes thanks to its nanoWatt XLP technology delivering deep-sleep current around 20 nA with full RAM retention. Its 16 KB Flash and 2 KB RAM comfortably run a sensor stack plus a wireless protocol like LoRaWAN or BLE, while the 1.8V-3.6V supply range supports two AA cells or a single Li-ion cell directly. The 12-bit ADC with up to 9 channels reads temperature, humidity, and battery voltage without external signal conditioning, and the RTCC keeps timestamps during sleep without external crystals. The PPS remapping minimizes external wiring by routing UART/SPI/I2C to any GPIO, freeing PCB area for a coin-cell footprint. Designers should duty-cycle the ADC and shut down unused peripherals to maximize battery life.
Recommended
Wearable Health Monitor
For wearable health monitors, the PIC24F16KA102-I/SS combines low active current, deep-sleep XLP modes, and a small 28-SSOP footprint suitable for thin enclosures. The CTMU peripheral enables touch sensing for user buttons without additional ICs, while the 10-bit DAC drives bias voltages for photoplethysmography (PPG) LEDs. The 16 MIPS performance at 32 MHz runs heart-rate algorithms in real time, and the RTCC maintains timekeeping during deep sleep at nanoamp currents. The wide 1.8V-3.6V supply matches single-cell Li-ion or coin-cell batteries directly. Pair with a low-Iq LDO and a 3-axis accelerometer to complete the wearable platform; use PPS to share SPI pins between the accelerometer and a BLE radio.
Recommended
Wireless Remote Control
Wireless remote controls benefit from the PIC24F16KA102-I/SS's deep-sleep current below 20 nA, enabling multi-year battery life on two AA cells. The 16 KB Flash stores proprietary RF protocols and button de-bounce tables, while the 19 GPIO pins handle matrix key-scans up to 8x8 without external scan ICs. The 12-bit ADC reads battery voltage and potentiometers for advanced remotes, and the PWM outputs control LED backlighting or haptic feedback. The 1.8V-3.6V supply range tolerates AA-cell voltage droop without voltage regulation, reducing BOM cost. Designers should wake the MCU only on button interrupts and use DSWDT during sleep to detect firmware lock-ups.
Recommended
Smart HVAC Thermostat
For HVAC thermostats, the PIC24F16KA102-I/SS provides the 16 MIPS performance, the 12-bit ADC accuracy, and the industrial -40C to +85C temperature grade required for wall thermostats. The 16 KB Flash stores scheduling logic, PID coefficients, and a UI menu structure, while the RTCC drives time-based setpoints without external crystals. The UART/SPI/I2C peripherals interface with a Wi-Fi module for remote control, a temperature/humidity sensor, and a backlit LCD. The 1.8V-3.6V supply runs from 24VAC-derived DC or 2x AA backup cells for power-loss ride-through. Use PPS to share SPI with both the Wi-Fi module and the LCD controller, reducing pin count.
Recommended
Smart Metering Endpoint
Smart metering endpoints benefit from the PIC24F16KA102-I/SS's wide 1.8V-3.6V supply range, EEPROM for non-volatile calibration, and XLP sleep currents that allow 10+ year battery life on metering endpoints. The 12-bit ADC with 9 channels reads pulse sensors, temperature, and battery voltage simultaneously. The 16 KB Flash fits metering firmware plus DLMS/COSEM or Wireless M-Bus protocol stacks. The CTMU enables electrostatic touch buttons for local readout. Industrial -40C to +85C operation handles outdoor meter cabinets. For metering with AC-line power, the MCU's deep-sleep modes allow backup battery operation during power outages without losing calibration data in EEPROM.
Recommended
Industrial Sensor Hub
Industrial sensor hubs benefit from the PIC24F16KA102-I/SS's industrial temperature grade, 16 MIPS performance for protocol bridging, and PPS remapping for flexible I/O assignment. The 16 KB Flash fits Modbus RTU or CANopen stacks, while the 2 KB RAM handles protocol buffers. The 12-bit ADC with 9 channels reads multiple 4-20 mA or 0-10V sensor inputs via external signal conditioning. The UART/SPI/I2C peripherals interface with industrial sensors, and the 5 timers handle pulse counting for flow meters. The 28-SSOP footprint is hand-solderable for prototype builds and survives standard SMT reflow for production. Use the DSWDT and DSBOR for fail-safe operation in industrial environments.
Recommended
Recommended Products Summary
Engineering reference data for PIC24F16KA102-I/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC24F08KA102-I/SS | PIC24F16KA102-E/SS | PIC24F08KL302-I/SS | PIC24F16KL402-I/SS |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SSOP | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same |
| Program Flash | 16 KB | 8 KB | 16 KB | 8 KB | 16 KB |
| Data RAM | 2 KB | 1.5 KB | 2 KB | 1 KB | 2 KB |
| Maximum CPU Speed | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS |
| Supply Voltage | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V |
| Operating Temperature | -40 C to +85 C (I grade) | -40 C to +85 C (I grade) | -40 C to +125 C (E grade) | -40 C to +85 C (I grade) | -40 C to +85 C (I grade) |
| I/O Pins | 19 | 19 | 19 | 21 | 21 |
Key Differentiators
- Highest Flash in 28-SSOP XLP family at 16 KB (vs PIC24F08KA102-I/SS)
- Industrial -40C to +85C vs extended -40C to +125C (vs PIC24F16KA102-E/SS)
- Mature XLP nanoWatt technology vs newer KL family (vs PIC24F16KL402-I/SS)
Design Notes
Take advantage of the XLP deep-sleep modes: configure DSBOR and DSWDT, gate unused peripherals via PMD registers, and switch the system clock to LPRC (31 kHz) before entering Sleep. Estimated deep-sleep current is around 20 nA at 25 C with full RAM retention, while run current at full 32 MHz is approximately 8 mA. Use the RTCC peripheral for wake-up timing instead of a hardware timer to keep sleep current minimal. Duty-cycle the ADC and shut down the CTMU when not in use to maximize battery life in IoT sensor nodes.
Place a 100 nF decoupling capacitor as close as possible to the VDD pin (pin 16) and a 10 uF bulk capacitor on the same supply rail. The 28-SSOP has a 0.65 mm pin pitch - use 0.20 mm trace width with 0.10 mm clearance to fit escape routing between pads. Route the MCLR pin (pin 1) with a 10 kohm pull-up to VDD and a 100 nF capacitor to ground for proper reset behavior. Keep the analog AVdd/AVss traces short and away from switching nodes to preserve 12-bit ADC accuracy. Add a ferrite bead or inductor in series with VDD if the supply is shared with RF or motor drivers.
Do not assume the ADC reference is VDD - the PIC24F16KA102 supports an external VREF+ on pin 18 (RA5) and a separate VREF- on RA4. Verify the ADC configuration bits during code bring-up; missing the VRCFG setting produces inaccurate readings. The PPS remapping requires unlocking the IOLOCK bit via OSCCON before writing RPINR/RPOR registers - locked PPS is a common first-programming failure. Avoid reading the ADC immediately after waking from sleep; allow the ADC RC oscillator to stabilize for at least 10 us before initiating a conversion. When using the RTCC in deep-sleep, ensure the secondary oscillator (SOSC) crystal is specified with the correct load capacitance per the datasheet.
Compliance Information
RoHS compliant and lead-free per Microchip product page and Win-Source distributor listing. Not AEC-Q100 qualified in the -I grade; consider the -E grade or PIC24F16KA102-I/ML for higher temperature operation. Conflict-minerals declaration compliant per Microchip corporate policy.
