PIC12LCE519-04I/SN - 8-bit 4MHz 1.5KB OTP MCU | Microchip
MPN: PIC12LCE519-04I/SN ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.72 | $2.72 |
| 10 | $2.45 | $24.50 |
| 100 | $2.18 | $218.00 |
| 500 | $1.95 | $975.00 |
| 1,000 | $1.78 | $1,780.00 |
PIC12LCE519-04I/SN Overview
What is a PIC® 12C microcontroller? The PIC® 12C series is a family of 8-pin, RISC-architecture microcontrollers from Microchip Technology designed for compact, cost-sensitive embedded control. Positioned in the broader hierarchy of microcontrollers -> embedded controllers -> semiconductor ICs, the 12C line emphasizes small footprint, low pin count, and OTP/EPROM/ROM program memory options, making it a baseline building block for simple logic-replacement and dedicated control tasks.
Key features of the PIC12LCE519-04I/SN include Power-On Reset (POR), Device Reset Timer (DRT), Watchdog Timer (WDT) with its own on-chip RC oscillator, and an internal EEPROM data memory block (16 bytes typical, distinguishing it from the non-EEPROM PIC12C519). The 'L' prefix denotes the low-power variant, and 'E' denotes the EEPROM data memory - together allowing battery-friendly operation down to 2.5 V supply.
Technically, the part uses a RISC Harvard architecture with only 33 single-word instructions; all instructions execute in one cycle except program branches (two cycles). This 4:1 speed advantage over comparable CISC parts simplifies deterministic timing. In-circuit serial programming (ICSP) is supported, enabling firmware updates after PCB assembly.
Typical applications include battery-powered sensor nodes, automotive aftermarket accessories, appliance control boards, small white-goods controllers, and remote-control transmitters. The wide 2.5-5.5 V supply range accommodates both 3.3 V coin-cell systems and 5 V regulated rails.
When designing with this part, place a 0.1 uF decoupling capacitor as close as possible to VDD, and reserve GP2/T0CKI for wake-up or external clock if needed. Note that OTP memory cannot be re-programmed in-circuit - design with EPROM (PIC12CE519 JW windowed) variants for prototype bring-up.
This page synthesizes verified distributor pricing, drop-in alternative MPNs, and practical design guidance not consolidated in the manufacturer datasheet, helping engineers evaluate supply-chain options and second-source risks as of 2026-09-16.
Drop-in alternatives for PIC12LCE519-04I/SN — 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 PIC12LCE519-04I/SN (same form factor and footprint) — differing in Core Architecture, Package, Data EEPROM, Instruction Cycle Time, Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC12CE519-04I/SN
✅ Drop-In📋 Reference alternative (not in catalog)
PIC12CE518-04E/SN
✅ Drop-In✓ In Stock
$1.38 / Unit
View Datasheet →PIC12LCE519-04/SN
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$1.22 / Unit
View Datasheet →PIC12LCE519-04I/SM
✅ Drop-In✓ In Stock
$1.07 / Unit
View Datasheet →PIC12CE519-04E/SN
✅ Drop-In✓ In Stock
$1.67 / Unit
View Datasheet →PIC12LCE519-04I/SN Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit RISC (PIC) |
| Family | PIC® 12C |
| Program Memory | 1.5 KB OTP (1K x 12) |
| RAM | 41 bytes |
| Data EEPROM | 16 bytes (internal, 'E' suffix) |
| I/O Pins | 6 |
| Clock Frequency (max) | 4 MHz |
| Instruction Cycle | 1 us at 4 MHz |
| Supply Voltage | 2.5 V to 5.5 V |
| Timers | 1 x 8-bit (TMR0) with programmable prescaler |
| Watchdog Timer | Yes (with own on-chip RC oscillator) |
| Power-On Reset | Yes |
| Device Reset Timer | Yes |
| In-Circuit Serial Programming | Yes (ICSP) |
| Package | 8-pin SOIC (SN, 3.90 mm body) |
| Operating Temperature | -40C to +85C (industrial, 'I' suffix) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
PIC12LCE519-04I/SN Pin Configuration
| Pin 1 | GP2/T0CKI — Bidirectional I/O; also TMR0 clock input |
| Pin 2 | GP3/MCLR (VPP) — Input-only I/O; also Master Clear (reset) / ICSP programming voltage |
| Pin 3 | GP4 — Bidirectional I/O |
| Pin 4 | GP5 — Bidirectional I/O |
| Pin 5 | VSS — Ground reference |
| Pin 6 | GP0 — Bidirectional I/O |
| Pin 7 | GP1 — Bidirectional I/O |
| Pin 8 | VDD — Positive supply (2.5 V to 5.5 V) |
Typical Applications
PIC12LCE519-04I/SN is suitable for 7 applications: Battery-Powered Sensor Nodes, Automotive Aftermarket Accessories, Small Appliance Control Boards, Remote Control Transmitters, Logic-Replacement and Glue Controllers, IoT Endpoint Controllers, Toys and Hobby Electronics.
Battery-Powered Sensor Nodes
The PIC12LCE519-04I/SN fits battery-powered sensor nodes because its 2.5 V minimum supply enables direct 3.3 V coin-cell operation without boost conversion, and its low-power CMOS design extends battery life in intermittent sampling duty cycles. With 6 I/O pins, the part interfaces to a single sensor (e.g., temperature, motion, or optical) while driving an LED indicator or low-power RF wake-up signal. The internal 16-byte data EEPROM stores calibration constants and node IDs that persist across deep-sleep cycles.
Recommended
Automotive Aftermarket Accessories
The PIC12LCE519-04I/SN suits automotive aftermarket accessories (alarm LED drivers, remote entry receivers, simple relay controllers) thanks to its industrial -40C to +85C temperature rating and 6 I/O pins. The watchdog timer with its own RC oscillator handles automotive electrical noise, and the ICSP programming allows firmware calibration after final assembly. Note that AEC-Q100 automotive qualification is not held, so for OEM-grade designs use PIC12F or PIC16F Q-qualified parts instead.
Recommended
Small Appliance Control Boards
The PIC12LCE519-04I/SN is well-suited for compact white-goods controllers (coffee makers, toasters, hair dryers, simple kitchen timers) where BOM cost dominates the design. The OTP program memory locks the firmware for high-volume production, eliminating external flash and reducing PCB area to the SOIC-8 footprint alone. The internal EEPROM stores user preferences (timer settings, mode selections) that survive power cycles, and the watchdog timer prevents lockup in unattended operation.
Recommended
Remote Control Transmitters
The PIC12LCE519-04I/SN drives infrared or sub-GHz RF remote control transmitters because its 6 I/O pins support 3-4 button inputs plus a status LED and the modulated output. The 4 MHz oscillator and 1 us instruction cycle enable precise timing of carrier frequencies (e.g., 38 kHz IR, 433 MHz OOK preamble), and the low-voltage operation suits 3 V coin cells. Internal EEPROM retains paired-device IDs across battery swaps.
Recommended
Logic-Replacement and Glue Controllers
The PIC12LCE519-04I/SN replaces discrete 74-series logic gates in space-constrained boards by consolidating AND/OR/XOR/latch functions into a single 8-pin device. Compared to a discrete CMOS gate array, the PIC approach adds one extra PCB site but eliminates several trace crossings and reduces BOM complexity. The OTP memory permanently encodes the logic table, and the 41 bytes RAM provides state buffering for sequences. Industrial temperature grade handles harsh enclosures.
Recommended
IoT Endpoint Controllers
The PIC12LCE519-04I/SN fits IoT endpoint controllers that pair with an external transceiver module (Wi-Fi, LoRa, BLE), handling sensor sampling, simple state machine logic, and network event timing. With 1.5 KB OTP program memory, the firmware holds a small protocol stack or simple AT-command interpreter. The 2.5-5.5 V supply range matches both 3.3 V module rails and 5 V USB-powered systems. For OTA firmware update requirements, choose a Flash alternative like PIC12F1840.
Recommended
Toys and Hobby Electronics
The PIC12LCE519-04I/SN is a common choice in hobby electronics, educational kits, and entry-level consumer toys because of its low unit cost ($2.72 at qty 1) and SOIC-8 breadboard-friendly footprint. The 33-instruction RISC core is simple enough for first-time embedded programmers, while ICSP enables same-board firmware flashing via low-cost Microchip programmers (PICkit 3, MPLAB Snap). The OTP memory prevents firmware piracy in commercial releases.
Recommended
Recommended Products Summary
Engineering reference data for PIC12LCE519-04I/SN — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC12CE519-04I/SN | PIC12CE518-04E/SN | PIC12LCE519-04/SN | PIC12LCE519-04I/SM | PIC12CE519-04E/SN |
|---|---|---|---|---|---|---|
| Package | 8-SOIC (3.90 mm) | 8-SOIC - same | 8-SOIC - same | 8-SOIC - same | 8-SOIC - same | 8-SOIC - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory | 1.5 KB OTP | 1.5 KB OTP | 768 bytes OTP | 1.5 KB OTP | 1.5 KB OTP | 1.5 KB OTP |
| Data EEPROM | 16 bytes | 16 bytes | None (no E in name) | 16 bytes | 16 bytes | 16 bytes |
| Supply Voltage (min) | 2.5 V | 3.0 V (+20%) | 3.0 V (+20%) | 2.5 V (same) | 2.5 V (same) | 3.0 V (+20%) |
| I/O Pins | 6 | 6 | 6 | 6 | 6 | 6 |
| Max Clock | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz |
| Operating Temperature | -40C to +85C (industrial) | -40C to +85C (industrial) | -40C to +125C (extended) | 0C to +70C (commercial) | -40C to +85C (industrial) | -40C to +125C (extended) |
| RAM | 41 bytes | 41 bytes | 25 bytes (-39%) | 41 bytes | 41 bytes | 41 bytes |
Key Differentiators
- Low-voltage operation down to 2.5 V enables direct coin-cell designs (vs PIC12CE519-04I/SN)
- Internal data EEPROM for runtime data persistence (vs PIC12CE518-04E/SN)
- Industrial temperature rating for harsh environments (vs PIC12LCE519-04/SN)
Design Notes
Place a 0.1 uF decoupling capacitor as close as possible to the VDD pin (pin 8), with the ground return trace short and direct to VSS (pin 5). The PIC12LCE519 draws brief current spikes during instruction fetches; without local decoupling the supply rail can droop and trigger spurious brown-out resets. For battery applications, add a 10 uF bulk capacitor at the supply source to handle the inrush during MCLR-rise power-on. The 'L' variant operates down to 2.5 V, so a single lithium coin cell with no LDO is acceptable.
Pin 2 (GP3/MCLR) is input-only and MUST be tied to VDD through a pull-up resistor (typically 10 kohm) for normal operation. Floating MCLR causes unpredictable resets and ICSP programming failure. Also note that GP3 cannot be used as a digital output, even though it is bidirectional in software - the datasheet specifies the output driver is absent on this pin. For designs requiring firmware updates, expose ICSP pins (GP3/MCLR, GP0, GP1, VSS, VDD) on header pads or test points.
Keep the oscillator trace short and surround it with a ground guard ring if using an external crystal or resonator. Although the PIC12LCE519 typically uses an external RC or 4 MHz crystal, long oscillator traces pick up EMI and cause frequency drift or jitter. For the SOIC-8 footprint, route VDD and VSS on opposite ends of the package (pin 8 and pin 5) to maximize the natural decoupling loop area being small. Avoid routing high-frequency signals (PWM, oscillator) under the IC body.
If your design will use in-circuit serial programming (ICSP), reserve test pads or pin-header access to GP0 (ICSPDAT), GP1 (ICSPCLK), MCLR/VPP, VDD, and VSS. ICSP enables firmware updates after PCB assembly and is essential for prototype bring-up. For OTP parts, ensure your firmware is fully validated before committing to production programming - OTP cannot be re-written. Consider developing on the Flash equivalent PIC12F508 first, then porting verified firmware to PIC12LCE519 for volume.
Compliance Information
RoHS and REACH compliant per Microchip product page; lead-free SOIC package. Not AEC-Q100 qualified - for automotive OEM applications use PIC12F or PIC16F Q-qualified parts.
