PIC24F04KL100-E/P - 16-bit MCU, 4KB Flash, 32MHz XLP | Microchip
MPN: PIC24F04KL100-E/P ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.18 | $2.18 |
| 10 | $1.96 | $19.60 |
| 100 | $1.74 | $174.00 |
| 500 | $1.55 | $775.00 |
| 1,000 | $1.38 | $1,380.00 |
PIC24F04KL100-E/P Overview
A 16-bit microcontroller (MCU) is a programmable computing device that combines a CPU, memory, and peripherals on a single silicon die. PIC24F devices use a 16-bit modified Harvard architecture with a CISC instruction set optimized for C compiler code density, sitting in the hierarchy: microcontroller -> MCU -> embedded processor -> semiconductor IC. The KL sub-family emphasizes ultra-low-power operation, making it well-suited to battery-driven and energy-harvesting designs.
Key specifications include an operating voltage range of 1.8 V to 3.6 V (with 2 V/3.3 V typical targets), an integrated 16 MHz internal RC oscillator, on-chip peripherals such as MSSP (I2C/SPI), CCP, 10-bit ADC, comparators, timers, PWM, HLVD, and Brown-out Reset. The 14-pin PDIP package is 0.300 inch (7.62 mm) wide and is supplied in tube packaging for prototyping or low-volume production.
The KL1 architecture uses an enhanced 16-bit CPU core with hardware multiply support and a 16-bit-wide instruction path, enabling deterministic interrupt latency and DSP-friendly operations despite its small footprint. The XLP nanoWatt technology provides sleep currents in the microampere range, RTC operation from a coin cell, and deep sleep modes that retain RAM, allowing year-long battery life in typical IoT duty-cycled applications.
Typical applications include battery-powered IoT sensor nodes, wearable fitness/health monitors, low-power remote controls, consumer appliances with capacitive touch interfaces, and cost-sensitive industrial sensor transmitters. The wide migration path from PIC18 peripherals (MSSP, CCP) simplifies firmware porting from 8-bit designs.
Designers should note that 4KB Flash and 512B RAM are very modest; large protocol stacks (TCP/IP, BLE) require careful RAM budgeting or migration to larger KL/EP variants. Decoupling VDD/AVSS with 100 nF ceramic capacitors close to the pins is recommended, and ICSP programming pins (PGEDx/PGECx) must be reserved on the PCB for in-circuit programming and debug.
This page synthesizes verified distributor pricing, same-brand drop-in alternatives, cross-reference tool results, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for PIC24F04KL100-E/P — 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 PIC24F04KL100-E/P (same form factor and footprint) — differing in Package, ADC, Program Memory (Flash), Operating Temperature, Comparators.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC24F04KL101-E/P
✅ Drop-In📋 Reference alternative (not in catalog)
PIC24F04KA200-I/P
✅ Drop-In📋 Reference alternative (not in catalog)
PIC24F04KA201-I/P
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18LF46K22-E/P
✅ Drop-In✓ In Stock
$3.5 / Unit
View Datasheet →PIC24F04KL102-E/P
✅ Drop-In📋 Reference alternative (not in catalog)
PIC24F04KL100-E/P Maximum Ratings & Electrical Characteristics
| Core | PIC24F (16-bit) |
| Family | PIC24F KL1 / XLP nanoWatt |
| Program Memory (Flash) | 4 KB (1.375K x 24) |
| RAM | 512 bytes |
| Maximum CPU Speed | 32 MHz (16 MIPS) |
| Operating Voltage Range | 1.8 V to 3.6 V |
| I/O Pins | 12 (typical for 14-pin package) |
| ADC | 10-bit on-chip |
| Communication | MSSP (I2C/SPI), UART |
| Timers/PWM/CCP | Yes (Capture/Compare/PWM modules) |
| Comparators | Yes |
| Internal Oscillator | 16 MHz (factory calibrated) |
| Package | 14-pin PDIP (0.300 inch / 7.62 mm) |
| Mounting Type | Through-Hole (DIP) |
| Operating Temperature | -40C to +125C (Extended, -E suffix) |
| Brown-out Reset / HLVD / POR / WDT | Yes |
| RoHS Status | Compliant |
| Lead-Free | Yes |
PIC24F04KL100-E/P Pin Configuration
| Pin 1 | RA5 — Port A bit 5 / ICSP VPP / MCLR |
| Pin 2 | RA0 — Port A bit 0 / AN0 / CVREF |
| Pin 3 | RA1 — Port A bit 1 / AN1 / OA1OUT |
| Pin 4 | RA2 — Port A bit 2 / AN2 / CVREF+ |
| Pin 5 | RA3 — Port A bit 3 / AN3 / OC1 |
| Pin 6 | RA4 — Port A bit 4 / AN4 / OC2 |
| Pin 7 | VSS — Ground reference |
| Pin 8 | RA7 — Port A bit 7 / OSC1 |
| Pin 9 | RA6 — Port A bit 6 / OSC2 / CLKO |
| Pin 10 | RC5 — Port C bit 5 / SDA / SDI |
| Pin 11 | RC4 — Port C bit 4 / SCL / SCK |
| Pin 12 | RC3 — Port C bit 3 / AN9 / SCL2 |
| Pin 13 | RC2 — Port C bit 2 / AN8 / SDA2 |
| Pin 14 | VDD — Positive supply voltage |
Typical Applications
PIC24F04KL100-E/P is suitable for 6 applications: Battery-Powered IoT Sensor Node, Wearable Fitness/Health Monitor, Low-Power Remote Control / Key Fob, Cost-Sensitive Industrial Sensor Transmitter, Consumer Appliance with Capacitive Touch UI, Smart Home Wireless Sensor / Beacon.
Battery-Powered IoT Sensor Node
The PIC24F04KL100-E/P is ideal for battery-powered IoT sensor nodes because of its 1.8-3.6 V supply range (allowing direct coin-cell or 2xAA operation without an external LDO), nanoWatt XLP sleep currents in the microampere range, and integrated 10-bit ADC for direct sensor digitization. With 4 KB Flash and 512 B RAM, it handles state-machine firmware and small sensor protocols (e.g., Modbus RTU over UART) at 16 MIPS throughput. The MSSP supports SPI sensors (temperature, accelerometers) while I2C handles EEPROM or display peripherals. Placing the MCU in Deep Sleep between sensor reads and using a timer interrupt to wake at multi-second cadence can extend battery life beyond one year.
Recommended
Wearable Fitness/Health Monitor
Wearables benefit from the PIC24F04KL100-E/P's low-power PIC24F core, extended -40C to +125C operating range, and small 14-pin PDIP footprint ideal for compact wearable prototypes. Its 16 MIPS throughput easily handles simple heart-rate sampling, step counting, and BLE/Sub-GHz host-MCU handshakes over UART. The integrated 10-bit ADC captures pulse-oximeter or heart-rate signals while CCP/PWM drives haptic feedback or LED indicators. XLP nanoWatt technology means wearables can stay in retention sleep while still keeping RAM state, waking only on interrupt to take a measurement and return to sleep.
Recommended
Low-Power Remote Control / Key Fob
The PIC24F04KL100-E/P suits low-power remote-control and key-fob designs thanks to its nanoWatt XLP sleep modes (microampere-range currents), interrupt-on-change wake capability, and 32 MHz/16 MIPS performance for quick button-decode and RF encoding. The integrated MSSP SPI port can drive an Sub-GHz or 2.4 GHz transceiver while timers handle the button-debounce and protocol timing. Operating voltage down to 1.8 V lets a single CR2032 coin cell power the design directly. The 14-pin PDIP package is breadboard-friendly for early prototyping and rework-tolerant for low-volume products.
Recommended
Cost-Sensitive Industrial Sensor Transmitter
Industrial 4-20 mA loop-powered or battery-backed sensor transmitters fit the PIC24F04KL100-E/P perfectly: the extended -40C to +125C temperature grade handles harsh environments, while the 1.8-3.6 V VDD range supports both loop-power harvesting and direct battery operation. The 16-bit core simplifies linearization math for thermocouples, RTDs, and bridge sensors. UART output is straightforward for RS-485 link partners using an external transceiver. Hysteresis on the on-chip comparator enables threshold-based alarms at zero CPU cost.
Recommended
Consumer Appliance with Capacitive Touch UI
Consumer appliances with capacitive touch interfaces leverage the PIC24F04KL100-E/P's mTouch capacitive-touch hardware support via the on-chip comparators and CTMU module, removing the need for a dedicated touch controller. The MSSP I2C port drives small OLED or segment LCD displays while PWM controls LED backlights and buzzer tones. Low sleep current means appliances in standby draw under 1 mA, easing Energy Star compliance. The 16 MIPS throughput is sufficient to run a state machine, button de-bounce, and indicator animations simultaneously.
Recommended
Smart Home Wireless Sensor / Beacon
Smart-home BLE or Sub-GHz beacons use the PIC24F04KL100-E/P as the host MCU because of its tiny 14-pin PDIP form factor, low sleep current, and integrated MSSP SPI that drives an off-the-shelf 2.4 GHz or Sub-GHz transceiver. At 16 MIPS, the PIC24F04KL100 can handle simple beacon packet assembly while remaining in deep sleep for the bulk of the duty cycle. Power comes from a CR2032 coin cell with no LDO required. UART debug logging is built in, simplifying in-house RF certification testing.
Recommended
Recommended Products Summary
Engineering reference data for PIC24F04KL100-E/P — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC24F04KL101-E/P | PIC24F04KA200-I/P | PIC24F04KA201-I/P | PIC24F04KL102-E/P |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 14-pin PDIP | 14-pin PDIP (same) | 14-pin PDIP (same) | 14-pin PDIP (same) | 14-pin PDIP (same) |
| Core | PIC24F 16-bit | PIC24F 16-bit | PIC24F 16-bit | PIC24F 16-bit | PIC24F 16-bit |
| Flash Memory | 4 KB | 4 KB (same) | 8 KB (+100%) | 8 KB (+100%) | 4 KB (same) |
| RAM | 512 bytes | 512 B (same) | 1 KB (+100%) | 1 KB (+100%) | 512 B (same) |
| Maximum CPU Speed | 32 MHz (16 MIPS) | 32 MHz (same) | 32 MHz (same) | 32 MHz (same) | 32 MHz (same) |
| 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 +125C (Extended) | -40C to +125C | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +125C |
| XLP nanoWatt Sleep Mode | Yes | Yes | Yes | Yes | Yes |
Key Differentiators
- 16-bit performance in smallest PIC24F package (vs PIC18F equivalent)
- Upgrade path within same 14-pin PDIP footprint (vs PIC24F04KA201-I/P)
- Extended temperature grade (-40C to +125C) (vs PIC24F04KA200-I/P (industrial -40C to +85C))
Design Notes
Decouple VDD/AVSS with a 100 nF ceramic capacitor placed within 5 mm of the supply pins; add a bulk 1-10 uF capacitor near the IC for switching-transient support. The PIC24F04KL100-E/P's 1.8-3.6 V range allows direct coin-cell operation but expect higher sleep currents at higher VDD - use the lowest acceptable voltage (typically 2.0 V) and the internal 16 MHz RC oscillator when timing tolerance permits.
Reserve PGDx/PGCx ICSP pins (RA0/RA1 typically) and MCLR (RA5) on the PCB even if not used in the application; this enables in-circuit programming and debugging without board rework. Place the ICSP header on the board edge so the PICkit 3/4 or MPLAB Snap can clip on easily. Keep traces from the ICSP pins short to reduce programming noise.
Do not exceed 3.6 V on VDD or apply voltage to any pin before VDD is stable - the PIC24F04KL100 has no internal clamp diodes on I/O pins for supply-rail injection. With only 512 B of RAM, avoid large stack allocations; declare large buffers static or upgrade to PIC24F04KA201 (1 KB RAM). Watch stack depth if using nested interrupts with printf-style format strings.
The MSSP I2C/SPI pins (RC4/RC5 in this 14-pin package) require proper pull-up resistors for I2C operation (typically 4.7 kohm at 100 kHz, 2.2 kohm at 400 kHz) and series resistors for SPI if the bus is longer than 50 mm. Keep analog inputs (AN0-AN4) physically separated from digital switching traces to avoid ADC noise coupling.
Compliance Information
RoHS-compliant Pb-free PDIP package per Microchip product page. Not AEC-Q100 qualified; for AEC-Q100 automotive applications use PIC24F-EP or PIC24F-HV automotive families.
