PIC24F04KL101-I/SO - 16-bit XLP MCU, 4KB Flash, 32MHz | Microchip
MPN: PIC24F04KL101-I/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.1 | $2.10 |
| 10 | $1.85 | $18.50 |
| 100 | $1.52 | $152.00 |
| 500 | $1.28 | $640.00 |
| 1,000 | $1.05 | $1,050.00 |
PIC24F04KL101-I/SO Overview
Key features include 17 general-purpose I/O pins, a 14-channel 10-bit ADC, two 8-bit timers plus one 16-bit timer, an MSSP peripheral supporting I2C/SPI, a CCP module, and a 5-bit DAC. The device operates from 1.8V to 3.6V with active current typically under 2 mA at full MIPS and sleep currents in the microamp range via XLP modes.
The PIC24F04KL101 uses a modified Harvard 16-bit architecture with single-cycle multiply and a 16-element register file, giving deterministic interrupt response suitable for cost-sensitive real-time control loops. The MSSP with both I2C (SMBus-compatible) and SPI modes lets designers migrate easily from PIC18 designs.
Typical applications include low-power sensor nodes, battery-powered IoT endpoints, consumer white goods user-interface controllers, and cost-sensitive HVAC/lighting peripherals where nanoWatt XLP sleep current and small Flash are sufficient. Wide VDD and temperature tolerance also suit handheld medical and metering products.
When designing with this MCU, ensure decoupling capacitors are placed within 5 mm of VDD/VSS and follow Microchip AN1299 for low-power mode transitions. The 20-pin SOIC (W) package is hand-solder friendly but limits I/O count versus 28/44-pin KL variants; confirm your pin budget before selecting this package.
This page consolidates distributor pricing, drop-in alternatives, and practical design notes that go beyond the manufacturer datasheet. According to Microchip product page, the part is active and shipping today with -40C to +85C industrial temperature rating.
Drop-in alternatives for PIC24F04KL101-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 PIC24F04KL101-I/SO (same form factor and footprint) — differing in ADC, Package, Operating Temperature, Timers, Core Architecture.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC24F04KL100-I/P
✅ Drop-In✓ In Stock
$1.55 / Unit
View Datasheet →PIC24F04KL101-E/SO
✅ Drop-In✓ In Stock
$1.05 / Unit
View Datasheet →PIC24F04KA201-I/SO
✅ Drop-In✓ In Stock
$1.78 / Unit
View Datasheet →PIC24F04KA200-I/ST
✅ Drop-In✓ In Stock
$1.42 / Unit
View Datasheet →PIC24F04KL101-I/SO Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC24F 16-bit RISC |
| Program Memory (Flash) | 4 KB (1.375K x 24) |
| Data Memory (SRAM) | 512 B |
| Maximum CPU Speed | 32 MHz / 16 MIPS |
| Operating Voltage Range | 1.8 V to 3.6 V |
| I/O Pins | 17 |
| ADC | 10-bit, 9 channels |
| Timers | 2 x 8-bit, 1 x 16-bit |
| Communication Peripherals | 1 x MSSP (I2C/SPI), 1 x UART |
| Capture/Compare/PWM | 1 x CCP |
| DAC | 5-bit |
| Package | 20-pin SOIC (W) wide body, tube |
| Operating Temperature | -40C to +85C (industrial) |
| Low-Power Technology | nanoWatt XLP |
| Mounting Type | Surface Mount |
| MSL Level | 1 (unlimited) |
| RoHS Status | Compliant |
PIC24F04KL101-I/SO Pin Configuration
| Pin 1 | MCLR — Master Clear (reset) input, active-low |
| Pin 2 | RA0 — Port A bit 0 / ICSPDAT |
| Pin 3 | RA1 — Port A bit 1 / ICSPCLK |
| Pin 4 | RA2 — Port A bit 2 |
| Pin 5 | RA3 — Port A bit 3 |
| Pin 6 | RA4 — Port A bit 4 |
| Pin 7 | RA5 — Port A bit 5 |
| Pin 8 | VSS — Ground reference |
| Pin 9 | RA7 — Port A bit 7 |
| Pin 10 | RA6 — Port A bit 6 |
| Pin 11 | RC5 — Port C bit 5 |
| Pin 12 | RC4 — Port C bit 4 |
| Pin 13 | RC3 — Port C bit 3 / SCL |
| Pin 14 | RC2 — Port C bit 2 / SDA |
| Pin 15 | RC1 — Port C bit 1 |
| Pin 16 | RC0 — Port C bit 0 |
| Pin 17 | RB7 — Port B bit 7 |
| Pin 18 | RB6 — Port B bit 6 |
| Pin 19 | VSS — Ground reference (second) |
| Pin 20 | VDD — Positive supply voltage |
Typical Applications
PIC24F04KL101-I/SO is suitable for 6 applications: Battery-Powered IoT Sensor Nodes, Consumer White Goods User Interface, Low-Power HVAC and Lighting Peripherals, Portable Medical Monitoring Devices, Handheld Metering and Instrumentation, Cost-Sensitive Industrial Control Modules.
Battery-Powered IoT Sensor Nodes
The PIC24F04KL101-I/SO fits battery-powered IoT sensor nodes because of its nanoWatt XLP sleep current (microamp range) and 1.8-3.6V VDD that aligns directly with single-cell Li-Ion or 2xAA chemistries. The 4KB Flash is sufficient for sensor drivers and a small MQTT/CoAP stack; 17 GPIO supports multiple sensor buses. Placed as the main MCU between a sensor and a low-power RF module, it wakes on interrupt, samples, transmits, and returns to sleep. Trade-off: 4KB Flash limits on-chip protocol stacks - external EEPROM is needed for larger data buffers.
Recommended
Consumer White Goods User Interface
The PIC24F04KL101-I/SO is well-suited to white-goods UI panels (washing machines, dishwashers, microwave ovens) where its 17 GPIO can directly drive LED indicators, 7-segment displays, and capacitive touch buttons via the CCP and timer peripherals. The MSSP supports I2C for keypad scanning and SPI for the main display controller. At 16 MIPS, button-press debouncing and menu navigation respond instantly. Trade-off: 5-bit DAC provides low-resolution analog control - use an external DAC for fine voltage references.
Recommended
Low-Power HVAC and Lighting Peripherals
The PIC24F04KL101-I/SO is ideal for HVAC sensors and lighting controls where XLP sleep modes enable years of battery life and the wide 1.8-3.6V supply tolerates battery droop. The 10-bit ADC reads thermistor or photocell inputs with adequate resolution for closed-loop control, while the CCP module generates PWM for LED dimming or valve actuation. Trade-off: only 4KB Flash limits on-chip firmware - designers must use compact coding standards and external EEPROM for logging.
Recommended
Portable Medical Monitoring Devices
The PIC24F04KL101-I/SO is appropriate for portable medical devices such as pulse oximeters and digital thermometers due to its low active current, deterministic 16-bit interrupt response, and industrial -40C to +85C temperature range that survives body-temperature environments. The MSSP I2C interface connects to biomedical sensor ASICs, while the 10-bit ADC reads analog front-end signals. Trade-off: medical designs requiring FDA-grade documentation may need PIC24F variants with explicit medical-grade qualification.
Recommended
Handheld Metering and Instrumentation
The PIC24F04KL101-I/SO is a strong fit for handheld meters (multimeters, light meters, moisture meters) where the 16 MIPS CPU executes measurement algorithms in real time and the 10-bit ADC samples sensor inputs at adequate rates. XLP modes extend battery life across years of standby. Trade-off: 4KB Flash limits complex UI libraries - designers must use compact state machines for menu navigation rather than full graphics stacks.
Recommended
Cost-Sensitive Industrial Control Modules
The PIC24F04KL101-I/SO supports cost-sensitive industrial modules such as sensor transmitters, simple PLC slices, and actuator controllers where its industrial -40C to +85C rating and 32 MHz performance handle deterministic control loops. The MSSP and UART peripherals interface to RS-485 transceivers or HMI displays. Trade-off: limited Flash prevents full Modbus stacks - consider PIC24EP variants when protocol complexity grows beyond 4KB.
Recommended
Recommended Products Summary
Engineering reference data for PIC24F04KL101-I/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC24F04KL100-I/P | PIC24F04KL101-E/SO | PIC24F04KA201-I/SO | PIC24F04KA200-I/ST |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | SOIC-20 (W) | SOIC-20 (W) - same | SOIC-20 (W) - same | SOIC-20 (W) - same | SOIC-20 (W) - same |
| Flash Memory | 4 KB | 4 KB | 4 KB | 4 KB | 2 KB |
| Maximum Frequency | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS |
| Operating 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 | -40C to +85C | -40C to +85C | -40C to +125C | -40C to +85C | -40C to +85C |
| 5-bit DAC | Yes | No | Yes | Yes | No |
| Low-Power XLP Mode | Yes (nanoWatt XLP) | Yes (nanoWatt XLP) | Yes (nanoWatt XLP) | Limited | Limited |
Key Differentiators
- Integrated 5-bit DAC at 4KB Flash tier (vs PIC24F04KL100-I/P)
- nanoWatt XLP for deepest sleep current (vs PIC24F04KA201-I/SO)
- Extended temperature option in same footprint (vs PIC24F04KL101-E/SO)
Design Notes
Place a 100 nF decoupling capacitor within 5 mm of the VDD pin and a bulk 10 uF tantalum or ceramic at the board's power entry. For battery applications, use MCP1700 or similar low-quiescent LDOs that draw under 2 uA to preserve XLP sleep budgets. Refer to Microchip AN1299 for nanoWatt XLP mode transition sequences to avoid inadvertently waking the MCU.
The 20-pin SOIC (W) wide-body package has 1.27 mm pin pitch and is hand-solder friendly, but trace routing under the package is not possible. Keep all signals on the top layer and use a 4-layer stackup only if EMI from RF traces is a concern. Per Microchip layout guidelines, place the crystal or resonator within 5 mm of OSC1/OSC2 with a guard ring tied to ground.
Do not leave the MCLR pin floating - tie it to VDD through a 10 kohm pull-up, or use the internal MCLR configuration in the config bits. When using ICSP, ensure the PGC/PGD lines are not loaded with heavy capacitance, which can prevent programming. Verify the config-word oscillator setting matches the actual crystal or internal oscillator selection; mismatches are a common cause of bricked parts.
Compliance Information
RoHS compliant per Microchip product page. Not AEC-Q100 qualified - choose automotive-grade PIC24 variants for vehicle applications. Lead-free and halogen-free per Microchip material declarations.
