PIC12CE519T-04/SN - 8-bit OTP MCU, 1.5KB EPROM, 41B RAM | Microchip
MPN: PIC12CE519T-04/SN ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.65 | $1.65 |
| 10 | $1.49 | $14.90 |
| 100 | $1.32 | $132.00 |
| 500 | $1.18 | $590.00 |
| 1,000 | $1.05 | $1,050.00 |
PIC12CE519T-04/SN Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, data memory, and peripherals. The PIC12CE519 belongs to Microchip's PIC12C 8-bit baseline family and sits inside the broader taxonomy: 8-bit MCU -> RISC microcontroller -> PIC microcontroller -> embedded processor -> semiconductor. In a typical system hierarchy it operates below a host processor or human-machine interface, handling housekeeping tasks such as sensor sampling, switch debouncing, LED blinking, simple PWM generation, and serial bit-banged communication.
Key features include 33 single-word instructions (most are single-cycle at 1 microsecond, branches take two cycles), a 4 MHz external clock input, an on-chip EEPROM for non-volatile data storage, a power-on reset (POR) and brown-out reset, a programmable watchdog timer (WDT) with its own on-chip RC oscillator, and wide operating voltage from 2.5V to 5.5V. These features give designers a tiny, low-pin-count MCU capable of replacing discrete logic in space-constrained products. The integrated EEPROM is the defining difference versus the sibling PIC12C519 - it lets the firmware store calibration values, configuration settings, or usage counters that must survive power cycles.
Technically, the device uses a Harvard RISC architecture with separate program and data buses, enabling single-cycle instruction fetch and execution. A two-stage pipeline overlaps fetch and execute, and the 8-bit ALU plus 14-bit instruction word is optimized for compact code density. Peripheral integration is deliberately minimal - GPIO, timer0, watchdog, and EEPROM - to keep die size, cost, and current consumption low. Typical active current is well below 1 mA at 4 MHz, making the part appropriate for battery-powered and always-on auxiliary controllers.
Typical applications include appliance control sub-modules (rice cookers, fans, coffee makers), remote control transmitters, sensor interface front-ends, smart LED controllers, battery chargers, automotive interior accessories such as ambient lighting or window controls, and industrial timer or counter modules. The wide 2.5V to 5.5V range supports both 3.3V and 5V rails. The on-chip EEPROM is especially useful for storing user-setpoints, calibration coefficients, or device serial numbers without external memory.
A key design consideration is OTP-only program memory: the PIC12CE519T-04/SN cannot be re-programmed in-circuit, so firmware must be validated before device programming and one-time-only programming strategy must be planned. The 41-byte RAM is small - allocate stack and scratchpad carefully, avoid large local buffers, and consider migrating to a flash-based PIC10F or PIC12F part for prototyping before committing to OTP. For development, use the PIC12CE519 with a JW windowed package or a flash-based sibling such as PIC12F519 to iterate firmware quickly.
This page synthesizes distributor pricing, drop-in alternatives drawn from Microchip's PIC12C 8-bit family, and practical design notes not consolidated in the manufacturer datasheet.
Drop-in alternatives for PIC12CE519T-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 PIC12CE519T-04/SN (same form factor and footprint) — differing in Package, Core Architecture, Operating Temperature, Program Memory Size, Program Memory Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC12CE519-04/SN
✅ Drop-In✓ In Stock
$1.05 / Unit
View Datasheet →PIC12CE519-04E/SN
✅ Drop-In✓ In Stock
$1.67 / Unit
View Datasheet →PIC12CE518T-04E/SN
✅ Drop-In✓ In Stock
$1.4 / Unit
View Datasheet →PIC12CE518T-04I/SN
✅ Drop-In✓ In Stock
$1.55 / Unit
View Datasheet →PIC12CE518-04E/SN
✅ Drop-In✓ In Stock
$1.38 / Unit
View Datasheet →PIC12CE518-04E/P
✅ Drop-In📋 Reference alternative (not in catalog)
PIC12CE519T-04/SN Maximum Ratings & Electrical Characteristics
| Family | PIC12C 8-bit Baseline |
| Core Architecture | 8-bit Harvard RISC |
| Program Memory Type | OTP EPROM |
| Program Memory Size | 1.5 KB (1K x 14 words) |
| Data RAM | 41 bytes |
| Data EEPROM | 16 bytes (on-chip) |
| Maximum CPU Frequency | 4 MHz |
| Instruction Cycle Time | 1 microsecond at 4 MHz |
| Operating Voltage | 2.5 V to 5.5 V |
| Number of I/O Pins | 6 (GP0-GP5) |
| Timers | 1 x 8-bit Timer0 |
| Watchdog Timer | Yes, with dedicated on-chip RC oscillator |
| Brown-out Reset | Yes |
| Power-on Reset | Yes |
| Package | 8-pin SOIC (SN, 150 mil) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40 C to +85 C (industrial) |
| Instruction Set | 33 single-word instructions |
| RoHS Status | Compliant |
PIC12CE519T-04/SN Pin Configuration
| Pin 1 | VDD — Positive supply voltage (2.5V to 5.5V) |
| Pin 2 | GP5/OSC1/CLKIN — GPIO GP5, oscillator input, or external clock input |
| Pin 3 | GP4/OSC2/CLKOUT — GPIO GP4, oscillator output, or clock output (Fosc/4) |
| Pin 4 | GP3/MCLR/VPP — GPIO GP3 with weak pull-up, also Master Clear reset and programming voltage input |
| Pin 5 | GP2/T0CKI/INT — GPIO GP2, Timer0 clock input, or external interrupt |
| Pin 6 | GP1/ICSPCLK — GPIO GP1, also ICSP clock pin for serial programming |
| Pin 7 | GP0/ICSPDAT — GPIO GP0, also ICSP data pin for serial programming |
| Pin 8 | VSS — Ground reference |
Typical Applications
PIC12CE519T-04/SN is suitable for 6 applications: Appliance Control Sub-Modules, Remote Control Transmitters, Sensor Interface Front-Ends, Smart LED Controllers and Drivers, Battery Chargers and Power Management, Industrial Timers and Counters.
Appliance Control Sub-Modules
The PIC12CE519T-04/SN's tiny 8-pin SOIC footprint, 2.5V to 5.5V supply, and 6 GPIO make it a strong fit for sub-module controllers inside household appliances such as rice cookers, fans, coffee makers, and microwave keypads. The 1 microsecond instruction cycle is fast enough for switch debouncing, button-matrix scanning, and basic LED segment driving, while the on-chip EEPROM stores user-set cooking profiles and last-used settings that must survive power loss. Compared with a 16-pin PIC16, the 8-pin PIC12CE519T-04/SN saves PCB area and BOM cost in space-constrained sub-boards. Designers should budget code carefully: 41 bytes RAM limits local buffers, and stack depth must be kept shallow for reliable operation.
Recommended
Remote Control Transmitters
IR/RF remote controls benefit from the PIC12CE519T-04/SN's low cost, low power, and integrated EEPROM. The MCU can drive a 38 kHz carrier via bit-banged PWM on any GPIO and store device codes, pairing keys, or factory calibration in the 16-byte EEPROM. The 4 MHz internal operation supports common remote protocols (RC5, NEC, proprietary) without an external crystal. The wide 2.5V to 5.5V supply lets the device run directly from 2xAA or CR2032 cells. A recommended circuit uses GP0/GP1 for IR LED drive and EEPROM to retain paired-device IDs through battery swaps.
Recommended
Sensor Interface Front-Ends
The PIC12CE519T-04/SN is well matched to low-bandwidth sensor interface front-ends where it reads analog or digital sensors and translates them into simple logic-level outputs or UART bit-banged streams. Six GPIO are sufficient for one UART (TX/RX), a chip-select, an interrupt, and two status LEDs. EEPROM stores calibration coefficients for thermistors, load cells, or humidity sensors, and the wide 2.5V to 5.5V supply supports 3.3V digital sensors. For designs that need a real ADC, the PIC12F519 is the more modern alternative, but for purely digital sensor I/O the PIC12CE519T-04/SN keeps BOM cost minimal.
Recommended
Smart LED Controllers and Drivers
Addressable LED strips and decorative lighting controllers often use small 8-pin MCUs to generate WS2812 / NeoPixel timing or simple PWM dimming. The PIC12CE519T-04/SN's 1 microsecond instruction cycle is fast enough to bit-bang WS2812 waveforms at 800 kbps from a single GPIO, and EEPROM can store brightness/color presets. The 6 GPIO allow one data line, one button input, and four status LEDs - or two data lines for split LED channels. Designers should add a 5V buffer (e.g., 74HCT125) between the MCU output and the LED data input because the WS2812 expects 5V logic levels even when the PIC runs at 3.3V.
Recommended
Battery Chargers and Power Management
The PIC12CE519T-04/SN can supervise simple NiMH or single-cell Li-ion charging profiles by sampling voltage dividers with comparator-style GPIO and toggling charge MOSFETs. The integrated EEPROM records charge-cycle counts and battery health flags, and the 2.5V to 5.5V supply covers the full range from depleted 1S Li-ion to fully charged packs. For designs that need precise ADC measurement, the PIC12F519 with its 10-bit ADC is the better choice, but for on/off charger topologies the PIC12CE519T-04/SN provides enough intelligence at minimal cost.
Recommended
Industrial Timers and Counters
Industrial timer modules, event counters, and machine-hour meters often use 8-pin PIC MCUs because the application requires only a small amount of logic. The PIC12CE519T-04/SN's hardware watchdog timer with its own RC oscillator ensures the system recovers from electrical noise and ESD events on the factory floor. The 16-byte EEPROM stores total run hours and configuration parameters, and the extended-temperature variant PIC12CE519T-04E/SN tolerates -40 C to +125 C for unheated enclosures. For new industrial designs, however, Microchip recommends migrating to the PIC16F or PIC18F families for better diagnostics and field upgradability.
Recommended
Recommended Products Summary
Engineering reference data for PIC12CE519T-04/SN — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC12CE519-04/SN | PIC12CE519-04E/SN | PIC12CE518T-04E/SN | PIC12CE518T-04I/SN | PIC12CE518-04E/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 |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory | 1.5 KB OTP EPROM | 1.5 KB OTP EPROM | 1.5 KB OTP EPROM | 1.5 KB OTP EPROM | 1.5 KB OTP EPROM | 1.5 KB OTP EPROM |
| Data EEPROM | 16 bytes on-chip | 16 bytes on-chip | 16 bytes on-chip | None | None | None |
| Data RAM | 41 bytes | 41 bytes | 41 bytes | 41 bytes | 41 bytes | 41 bytes |
| Max CPU Clock | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz |
| GPIO Count | 6 (GP0-GP5) | 6 (GP0-GP5) | 6 (GP0-GP5) | 6 (GP0-GP5) | 6 (GP0-GP5) | 6 (GP0-GP5) |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +125 C | -40 C to +125 C | -40 C to +85 C | -40 C to +125 C |
Key Differentiators
- 16 bytes on-chip EEPROM for non-volatile data storage (vs PIC12CE518T-04E/SN)
- Tape-and-reel packaging for high-volume SMT assembly (vs PIC12CE519-04/SN)
- Wide 2.5V to 5.5V supply supports 3.3V and 5V designs (vs Cross-brand 8-pin MCU alternatives)
Design Notes
The PIC12CE519T-04/SN has only 41 bytes of RAM and a hardware stack depth of 2 - calling more than 2 nested functions (interrupts included) will overflow the stack and corrupt program flow. Plan call depth carefully and avoid recursive algorithms. With EEPROM enabled, allow extra stack depth for the in-circuit EEPROM write routine that Microchip's AN567 documentation recommends.
Place a 0.1 microfarat decoupling capacitor as close as possible to the VDD pin (pin 1) and a bulk 10 microfarat capacitor on the same rail. The PIC12CE519T-04/SN draws brief high-current pulses during EEPROM write cycles, and inadequate decoupling can trigger brown-out reset mid-write and corrupt the EEPROM. Estimated: with 5V VDD and 4 MHz CPU, active current is typically 1.1 mA and EEPROM write adds about 5 mA peak for 10 ms.
Route GP0/GP1 traces short and away from switching nodes if these pins are used for ICSP. In-circuit serial programming requires clean access to these pins; noisy layouts can cause programming failures. Place MCLR/VPP (pin 4) with a 10 kohm pull-up to VDD and a 100 pF capacitor to ground for ESD protection. Keep the crystal or resonator traces within 5 mm of pins 2 and 3 for stable oscillation.
Compliance Information
RoHS compliant per Microchip product page. Not AEC-Q100 qualified - choose PIC16F or PIC18F automotive-grade parts for vehicle applications. Operating temperature range -40 C to +85 C (industrial); choose the E-suffix variant for -40 C to +125 C extended range.
