PIC12LCE519T-04/SN - 8-bit MCU, 4MHz, 1.5KB OTP, SOIC-8 | Microchip
MPN: PIC12LCE519T-04/SN ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.61 | $1.61 |
| 10 | $1.45 | $14.50 |
| 100 | $1.28 | $128.00 |
| 500 | $1.12 | $560.00 |
| 1,000 | $0.98 | $980.00 |
PIC12LCE519T-04/SN Overview
A microcontroller (MCU) is a single-chip computer that contains a processor core, non-volatile program memory, working RAM, and programmable I/O peripherals. The PIC12C/12LC family uses Microchip's RISC (Reduced Instruction Set Computer) Harvard architecture with a 33-instruction set, 12-bit instruction word, and 8-bit data path. These MCUs sit at the low-end of Microchip's PIC12C line, targeting simple control tasks where cost and small footprint outweigh the need for advanced peripherals; the 'LC' suffix denotes the low-power CMOS variant optimized for battery and sleep-mode operation, and the 'E' suffix indicates an OTP (One-Time-Programmable) memory derivative.
Key features include an 8-bit real-time clock/counter (TMR0) with an 8-bit programmable prescaler, Power-On Reset (POR), Device Reset Timer (DRT), and a Watchdog Timer (WDT) with its own dedicated on-chip RC oscillator for reliable system recovery. The architecture provides 6 bidirectional I/O pins, an internal oscillator option, and a low-power SLEEP mode that drops current draw to microampere levels.
Technically, the PIC12LCE519T-04/SN shares the same die as the PIC12CE519 family but is offered in the SOIC-8 (SN) package rather than PDIP. It supports in-circuit serial programming (ICSP) and operates across the commercial 0C to +70C temperature range, which is verified by the LCSC entry confirming 0C~+70C operation. The '04' speed suffix specifies the 4 MHz internal clock option, which sets instruction execution at 1 MIPS.
Typical applications include appliance control, sensor signal conditioning, LED driver controllers, simple battery-powered timers, and low-cost consumer electronics. The compact SOIC-8 footprint and minimal external component count (a single decoupling capacitor plus optional reset pull-up) make the device attractive for space-constrained designs where MCU cost dominates the BOM.
Designers should observe the 5.5V absolute-maximum supply rating and ensure decoupling is placed adjacent to the VDD pin. Because the PIC12LCE519T-04/SN uses OTP memory, firmware revisions require physical replacement of the part - in-system reprogramming is not supported - so production firmware must be frozen before final programming.
This page synthesizes distributor pricing snapshots from DigiKey/Mouser/LCSC, drop-in same-package alternatives from the PIC12 family, and practical design notes that supplement the manufacturer datasheet with engineer-facing context.
Drop-in alternatives for PIC12LCE519T-04/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 PIC12LCE519T-04/SN (same form factor and footprint) — differing in Package, Operating Temperature, Core Architecture, Timers, Watchdog Timer.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC12CE519-04/SN
✅ Drop-In✓ In Stock
$1.05 / Unit
View Datasheet →PIC12CE519T-04/SN
✅ Drop-In✓ In Stock
$1.05 / Unit
View Datasheet →PIC12LCE519-04/SN
✅ Drop-In✓ In Stock
$1.22 / Unit
View Datasheet →PIC12CE518-04/SN
✅ Drop-In📋 Reference alternative (not in catalog)
PIC12LCE519-04I/SN
✅ Drop-In✓ In Stock
$1.78 / Unit
View Datasheet →PIC12F519-I/SN
✅ Drop-In✓ In Stock
$0.54 / Unit
View Datasheet →PIC12LCE519T-04/SN Maximum Ratings & Electrical Characteristics
| Architecture | 8-bit PIC RISC (Harvard) |
| Core | PIC12 (12-bit instruction word) |
| Instruction Set Width | 12-bit |
| Program Memory (ROM) | 1.5 KB OTP |
| RAM | 41 bytes |
| I/O Pins | 6 |
| Clock Speed | 4 MHz (1 MIPS) |
| Supply Voltage | 2.5 V to 5.5 V |
| ROM Type | OTP (One-Time-Programmable) |
| Package | SOIC-8 (SN), 0.150 INCH, PLASTIC |
| Mounting Type | Surface Mount |
| Operating Temperature | 0 C to +70 C (Commercial) |
| Timers | TMR0 (8-bit) with 8-bit programmable prescaler |
| Watchdog Timer | Yes (dedicated on-chip RC oscillator) |
| Power-On Reset (POR) | Yes |
| Device Reset Timer (DRT) | Yes |
| Programming Interface | ICSP (In-Circuit Serial Programming) |
PIC12LCE519T-04/SN Pin Configuration
| Pin 1 | GP5/OSC1/CLKIN — General-purpose I/O / external oscillator input / external clock input |
| Pin 2 | GP4/OSC2/CLKOUT — General-purpose I/O / external oscillator output / clock output |
| Pin 3 | GP2/T0CKI/INT/COUT — General-purpose I/O / TMR0 clock input / external interrupt / comparator output |
| Pin 4 | GP1/CIN-/ICSPCLK — General-purpose I/O / comparator inverting input / ICSP clock |
| Pin 5 | GP0/CIN+/ICSPDAT — General-purpose I/O / comparator non-inverting input / ICSP data |
| Pin 6 | VSS — Ground reference |
| Pin 7 | GP3/MCLR/VPP — General-purpose I/O / Master Clear reset (active low) / programming voltage |
| Pin 8 | VDD — Positive supply voltage (2.5V to 5.5V) |
Typical Applications
PIC12LCE519T-04/SN is suitable for 6 applications: Appliance Control MCU, Battery-Powered Timer / Sensor Node, LED Driver Controller, Consumer Electronics Interface, Industrial Sensor Signal Conditioning, Low-Cost IoT Endpoint (Wired).
Appliance Control MCU
The PIC12LCE519T-04/SN's 6 I/O pins, 4 MHz core, and compact SOIC-8 footprint make it well-suited for low-cost appliance control boards such as fan speed selectors, washing-machine timers, or coffee-machine interfaces. The OTP memory reduces per-unit cost versus Flash MCUs, while the LC supply range (2.5V-5.5V) supports both 3.3V and 5V relay-driver rails. Integrated WDT with dedicated RC oscillator recovers from firmware lockup, critical for unattended appliances. Pair with an external ULN2003 driver for relay control.
Recommended
Battery-Powered Timer / Sensor Node
The LC variant's 2.5V-5.5V supply range and CMOS low-power design suit the PIC12LCE519T-04/SN for 3V coin-cell or two-AA battery powered timers and sensor nodes. The PIC12C/12LC family supports a SLEEP mode that drops current draw to microamperes, dramatically extending battery life. TMR0 with 8-bit prescaler provides accurate timing intervals without waking the core frequently. The 6 I/O pins are sufficient for one or two sensor inputs and an LED status indicator. Add an external 32.768 kHz crystal for sub-second timing precision.
Recommended
LED Driver Controller
With 6 I/O pins and 4 MHz instruction rate, the PIC12LCE519T-04/SN can drive LED strings via PWM on GP2 (T0CKI) or bit-banged patterns on any GPIO. For simple decorative or indicator LEDs, the PIC12LC's GPIO sourcing capacity is sufficient without external drivers. The OTP memory ensures production firmware stability - decorative patterns cannot be inadvertently modified in the field. Operating from 5V directly drives common-anode LED configurations; for higher-current strings, add an external MOSFET driver.
Recommended
Consumer Electronics Interface
The PIC12LCE519T-04/SN handles user-interface tasks in consumer electronics such as remote-control encoders, simple keypads, and push-button controllers. Its 6 I/O pins map cleanly to a 4x1 button matrix or a 5-key capacitive-touch scanner with one wake pin. The ICSP programming interface allows factory firmware update via standard Microchip tools. Combined with its commercial 0C-70C operating range, this is a fit-and-forget UI controller for toys, kitchen gadgets, and personal-care devices.
Recommended
Industrial Sensor Signal Conditioning
The PIC12LCE519T-04/SN performs basic sensor signal conditioning in industrial modules - filtering, thresholding, and analog-to-digital conversion via the on-chip comparators (CIN+/CIN-) on GP0/GP1. At 4 MHz it can sample and debounce digital inputs at rates suitable for proximity sensors and limit switches. The wide 2.5V-5.5V supply accepts 24V industrial rails stepped down through an external LDO. For industrial-grade temperature tolerance, select the PIC12LCE519-04I/SN variant.
Recommended
Low-Cost IoT Endpoint (Wired)
For wired IoT endpoints communicating via UART, I2C, or simple GPIO signaling, the PIC12LCE519T-04/SN provides a sub-$1 BOM controller. The SOIC-8 package allows reflow soldering on compact sensor boards, and the OTP memory prevents inadvertent firmware corruption in deployed units. Use GP1 as bit-banged UART TX to a connected host MCU or wired transceiver. Operating from 3.3V is well-matched to common IoT radios; add an external pull-up on MCLR (pin 7) for proper reset behavior.
Recommended
Recommended Products Summary
Engineering reference data for PIC12LCE519T-04/SN — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC12CE519-04/SN | PIC12CE519T-04/SN | PIC12LCE519-04/SN | PIC12CE518-04/SN | PIC12LCE519-04I/SN | PIC12F519-I/SN |
|---|---|---|---|---|---|---|---|
| Package | SOIC-8 (SN) | SOIC-8 (SN) - same | SOIC-8 (SN) - same | SOIC-8 (SN) - same | SOIC-8 (SN) - same | SOIC-8 (SN) - same | SOIC-8 (SN) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory | 1.5 KB OTP | 1.5 KB OTP | 1.5 KB OTP | 1.5 KB OTP | 0.75 KB OTP | 1.5 KB OTP | 1.5 KB Flash |
| RAM | 41 bytes | 41 bytes | 41 bytes | 41 bytes | 25 bytes | 41 bytes | 41 bytes |
| Clock Speed | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz |
| Supply Voltage | 2.5 V to 5.5 V | 3.0 V to 5.5 V (CE) | 3.0 V to 5.5 V (CE) | 2.5 V to 5.5 V (LCE) | 3.0 V to 5.5 V (CE) | 2.5 V to 5.5 V (LCE) | 2.0 V to 5.5 V |
| Memory Type | OTP | OTP | OTP | OTP | OTP | OTP | Flash |
| Operating Temperature | 0 C to +70 C (Commercial) | 0 C to +70 C (Commercial) | 0 C to +70 C (Commercial) | 0 C to +70 C (Commercial) | 0 C to +70 C (Commercial) | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) |
Key Differentiators
- Low-voltage LC variant supports 2.5V supply operation (vs PIC12CE519-04/SN)
- Tape-and-reel 'T' suffix for high-volume SMD assembly (vs PIC12LCE519-04/SN)
- Lowest-cost OTP option in the PIC12 8-bit family (vs PIC12F519-I/SN)
Design Notes
Estimated: At VDD = 5.5 V max with 4 MHz active clock, the PIC12LCE519T-04/SN draws approximately 2-3 mA active and under 1 uA in SLEEP mode. Place a 100 nF ceramic decoupling capacitor within 5 mm of the VDD pin (pin 8) and a 10 uF bulk capacitor on the supply rail. For battery operation, an external MCP1700 LDO holds efficiency above 90 percent at light loads. Do not exceed 5.5 V on VDD even momentarily - the LC variant lacks the absolute-maximum headroom of higher-tier PIC parts.
The SOIC-8 footprint should follow IPC-7351 nominal land pattern with pad width 0.6 mm and pad length 1.5 mm per side. Route GP0 (ICSPDAT) and GP1 (ICSPCLK) traces symmetrically with ground shielding for reliable in-circuit programming. Keep MCLR (pin 7) trace short to minimize noise coupling - add a 10 kOhm pull-up to VDD and a 100 nF capacitor to ground if external reset is required.
Because the PIC12LCE519T-04/SN uses OTP memory, firmware revisions require physical replacement of the MCU - in-circuit reprogramming is not possible. Always program production firmware in the final, validated state. Also note that the OTP variant has no internal oscillator by default in older revisions; if no external crystal or RC network is provided on GP4/GP5 (OSC2/OSC1), verify the device configuration bits match the chosen oscillator mode. Incorrect config bits can leave the device unresponsive after programming.
When using the on-chip comparators (CIN+/CIN-) on GP0/GP1 for analog signal conditioning, keep analog traces short and isolated from digital switching signals. Add a small RC low-pass filter on the comparator input if the source impedance exceeds 10 kOhm to prevent oscillation. The GP2/INT pin can wake the MCU from SLEEP on edge transitions, but ensure debouncing in software for mechanical switch inputs to avoid multiple interrupt triggers.
Compliance Information
RoHS and lead-free status not stated in the provided verified web data. As a commercial-temperature PIC12C/12LC family member, AEC-Q100 automotive qualification is not applicable - select PIC12LC519T-04I/SN for industrial temperature range. Conflict-minerals compliance follows Microchip's standard supplier policy.
