PIC12LC509A-04I/SN - 8-bit 4MHz OTP MCU, 1.5KB | Microchip
MPN: PIC12LC509A-04I/SN ✓ Hoạt độngPIC12LC509A-04I/SN Tóm tắt
An 8-bit microcontroller (MCU) is a small, self-contained computer-on-a-chip that integrates a CPU, memory (ROM/RAM), and peripheral I/O into a single IC. The PIC12C family sits within Microchip's PIC microcontroller hierarchy: PIC12C -> PIC microcontroller -> 8-bit MCU -> microcontroller -> embedded processor -> semiconductor. These MCUs target applications that require deterministic real-time response, low power, and minimal BOM cost in compact packages.
Key features include 5 general-purpose I/O pins, an 8-bit real-time clock/counter (TMR0) with programmable prescaler, Power-On Reset (POR), Device Reset Timer (DRT), Watchdog Timer (WDT) with dedicated on-chip RC oscillator, programmable code protection, and 1,000,000 erase/write cycle endurance. The 33 single-word instruction RISC architecture simplifies code development while the CMOS OTP process minimises die area and cost.
Architecturally, the PIC12LC509A uses a Harvard structure with separate program and data paths, a 12-bit instruction word (vs 14-bit for PIC12F), and a 2-level deep hardware stack. The 'LC' prefix denotes the wide-voltage 2.5V-5.5V variant, while '04' specifies the 4MHz oscillator, and 'I' denotes the industrial temperature grade. The 'SN' suffix identifies the 8-pin SOIC package.
Typical applications include appliance control, sensor conditioning, LED driving, low-cost consumer electronics, automotive body modules, and battery-powered IoT edge devices. The 8-pin form factor with 5 I/O is well suited to space-constrained designs.
When designing, ensure your programmer supports the PIC12C OTP family (e.g. PICkit 2/3, MPLAB ICD) and configure CONFIG register bits correctly. OTP parts require one-pass programming; use PIC12C509A (EPROM window) or PIC12F509 (Flash) if in-circuit reprogrammability is needed.
This page synthesises distributor pricing, verified drop-in alternatives from the PIC12C/12F family, and practical design notes not found in the bare manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho PIC12LC509A-04I/SN — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với PIC12LC509A-04I/SN (cùng hình factor và footprint) — khác nhau ở Core Architecture, I/O Pins, Timers, Instruction Set, Package.
PIC12LC509A-04/SN
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC12LC509A-04I/SM
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC12C509A-04I/SN
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC12C508A-04I/SN
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC12F509-I/SN
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC12LC509A-04I/SN Tỷ lệ tối đa & tính chất điện
| Product Type | 8-bit Microcontroller (MCU) |
| Series | PIC12C |
| Core Architecture | PIC (RISC, 12-bit instruction word) |
| Program Memory | 1.5 KB (1K x 12) OTP |
| RAM | 41 bytes |
| CPU Speed | 4 MHz |
| Instruction Execution Time | 200 ns at 5V |
| Supply Voltage (Vdd) | 2.5 V to 5.5 V |
| Nhiệt độ hoạt động | -40C to +85C (Industrial) |
| I/O Pins | 5 |
| Timers | 1 x 8-bit (TMR0) with programmable prescaler |
| Watchdog Timer (WDT) | Yes, with dedicated on-chip RC oscillator |
| Power-On Reset (POR) | Yes |
| Device Reset Timer (DRT) | Yes |
| Code Protection | Programmable |
| Instruction Set | 33 single-word instructions |
| Hộp | 8-pin SOIC (SN) |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant |
| Lead-Free | Yes |
Cấu hình chân PIC12LC509A-04I/SN
| Chân 1 | GP5/OSC1/CLKIN — GPIO bit 5 / Crystal oscillator pin 1 / External clock input |
| Chân 2 | GP4/OSC2/CLKOUT — GPIO bit 4 / Crystal oscillator pin 2 / Clock output |
| Chân 3 | GP3/MCLR/Vpp — GPIO bit 3 (input only) / Master Clear reset / Programming voltage |
| Chân 4 | GP2/T0CKI — GPIO bit 2 / Timer 0 clock input |
| Chân 5 | GP1 — GPIO bit 1 |
| Chân 6 | GP0 — GPIO bit 0 |
| Chân 7 | Vss — Ground reference |
| Chân 8 | Vdd — Positive supply voltage (2.5V to 5.5V) |
Ứng dụng tiêu biểu
PIC12LC509A-04I/SN phù hợp cho 6 Áp dụngs: Battery-Powered IoT Edge Sensor Node, Automotive Body Module Lighting Control, Consumer Appliance User Interface Controller, Industrial Sensor Signal Conditioning, Smart Home Wireless Remote Control, Educational Microcontroller Teaching Platform.
Battery-Powered IoT Edge Sensor Node
The PIC12LC509A-04I/SN fits low-cost wireless sensor endpoints where its 2.5V-5.5V wide-voltage range allows direct operation from a single 3V coin cell down to end-of-life. Its 4MHz core executes wake-up sampling, ADC read (via external ADC), and sub-second transmit cycles while consuming microamp quiescent current in sleep. The 5 GPIO are sufficient to drive a digital sensor, indicator LED, and a sleep/wake interrupt line. With OTP cost under $0.80 at qty 1000, the part enables sub-$2 BOM nodes for throwaway asset tracking tags or smart-farming moisture probes where Flash reprogrammability is not required post-deployment.
Được đề xuất
Automotive Body Module Lighting Control
The PIC12LC509A-04I/SN is well suited to non-safety automotive body modules such as interior LED dimming, ambient lighting fade controllers, and rear-chassis courtesy lamps. The -40C to +85C industrial temp range covers cabin environments, and the 5 GPIO can directly drive N-MOSFET gate inputs or low-side LED strings up to 25mA per pin. The on-chip Watchdog Timer with dedicated RC oscillator provides the reset supervision that automotive OEMs require even for non-safety body modules. The PIC RISC architecture delivers deterministic 200ns instruction cycles, ensuring flicker-free PWM generation for LED current control at automotive 12V bus transients.
Được đề xuất
Consumer Appliance User Interface Controller
The PIC12LC509A-04I/SN is widely used as the tactile-button and 7-segment display controller in low-end white goods such as rice cookers, microwave ovens, and small kitchen appliances. Its 33 single-word RISC instructions simplify code review for IEC 60730 Class B safety software, and 1.5KB OTP easily fits state-machine UI logic, beep patterns, and timer counters. The Device Reset Timer and Power-On Reset ensure clean startup after brownouts common on inductive motor loads sharing the AC mains. The 8-pin SOIC with 5 GPIO is ideal for minimalist front-panel PCBs with 3-4 buttons plus a single buzzer or LED pair.
Được đề xuất
Industrial Sensor Signal Conditioning
In industrial 4-20mA loop-powered transmitters and binary threshold detectors, the PIC12LC509A-04I/SN provides the HART-friendly micro-controller or simple comparator-replacement logic. Its 2.5V minimum supply allows operation from loop-derived 3.3V rails. The Watchdog Timer is mandatory for IEC 61508 SIL-1 sensor SIL loops, and the programmable code protection prevents unauthorised firmware cloning by sensor competitors. With 5 GPIO, designers can drive a HART modem enable line, an open-drain fault output, and a 1-Wire EEPROM for calibration constants. The 4MHz core handles polynomial CRC and HART preamble generation without a DSP.
Được đề xuất
Smart Home Wireless Remote Control
Battery-powered remote controls for ceiling fans, blinds, RGB lighting strips, and HVAC zones are a classic PIC12LC509A-04I/SN application. Its wide-voltage range tolerates 2xAAA battery discharge from 3.0V fresh to 2.0V end-of-life. The 4MHz core wakes, scans a 3x4 button matrix via 5 GPIO using a Charlieplexing scheme, encodes the keystroke into a sub-GHz or infrared OOK protocol, and returns to sleep. Total active time per button press is typically under 5ms, yielding multi-year battery life. The OTP cost structure enables sub-$3 retail price points for high-volume consumer remotes.
Được đề xuất
Educational Microcontroller Teaching Platform
Universities and technical colleges use the PIC12LC509A-04I/SN as a low-cost introduction to embedded programming because the 33-instruction RISC set can be taught in a single lab session. The 1.5KB OTP forces disciplined code size, teaching students to optimise state machines and bit-banged interfaces. The PICkit 2/3 and MPLAB X IDE programmer support is mature and freely available. The 8-SOIC package fits on a standard 0.1-inch-pitch breakout board for breadboarding experiments. Each student can own multiple parts at under $1.50 unit cost, eliminating shared-lab bottlenecks for GPIO, timer, and Watchdog exercises.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC12LC509A-04I/SN — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | PIC12LC509A-04/SN | PIC12LC509A-04I/P | PIC12LC509A-04I/SM | PIC12C509A-04I/SN | PIC12C508A-04I/SN | PIC12F509-I/SN |
|---|---|---|---|---|---|---|---|
| Package | 8-SOIC (SN) | 8-SOIC (SN) - same | 8-PDIP - different | 8-SOIC (SM 208mil) - same footprint, wider body | 8-SOIC (SN) - same | 8-SOIC (SN) - same | 8-SOIC (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 | 1.5 KB OTP | 768 B OTP (-49%) | 1.5 KB Flash (vs OTP) |
| CPU Speed | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz |
| Supply Voltage (Vdd) | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 3.0 V to 5.5 V (-10%) | 3.0 V to 5.5 V (-10%) | 2.0 V to 5.5 V (+10%) |
| Operating Temperature | -40C to +85C (Industrial) | 0C to +70C (Commercial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
| Memory Type | OTP | OTP | OTP | OTP | OTP | OTP | Flash |
| Instruction Word Width | 12-bit | 12-bit | 12-bit | 12-bit | 12-bit | 12-bit | 14-bit (code recompile required) |
Bảo phân biệt quan trọng
- Wide-voltage 2.5V-5.5V operation in the same SOIC-8 footprint (vsPIC12C509A-04I/SN)
- Lowest unit cost in the PIC12C family at sub-$0.80 qty 1000 (vsPIC12F509-I/SN)
- Industrial -40C to +85C temperature grade included (vsPIC12LC509A-04/SN)
Ghi chú thiết kế
The PIC12LC509A-04I/SN operates from 2.5V to 5.5V; a 100nF decoupling capacitor must be placed within 5mm of the Vdd pin (pin 8) with a wide ground return to pin 7 (Vss). For battery applications drawing below 3.0V, the 'LC' prefix is mandatory - the standard PIC12C509A will not start below 3.0V. Add a 10uF bulk capacitor on the Vdd rail if the source impedance (e.g. coin cell) exceeds 10 ohms at 4MHz to prevent brown-out during GPIO transitions.
Pin 3 (GP3/MCLR/Vpp) is input-only on the PIC12LC509A - attempting to drive it as an output will not damage the part but will read back as '0'. The MCLR function is enabled by the CONFIG register bit MCLRE; if MCLRE = OFF, pin 3 becomes a digital input only and the internal POR provides reset. For programming, Vpp (typically 13V for OTP) must be applied to pin 3 even when MCLRE = OFF during ICSP.
When using an external crystal or resonator on pins 1 (OSC1) and 2 (OSC2), keep the crystal traces short (<10mm) and surround them with a ground pour to reduce EMI crosstalk onto the GP0/GP1 lines. For internal RC oscillator mode (factory default for the '04' speed grade), float pins 1 and 2 or use them as GPIO5/4 with the TRIS register. The OSC2 pin can drive a peripheral as CLKOUT only if the CONFIG bit CLKOUTEN is set.
The 4MHz internal oscillator is factory-trimmed to within +/-1% at 5V/25C; expect +/-2% drift across -40C to +85C and +/-5% drift at 2.5V. For UART or infrared protocols requiring better than +/-2% baud accuracy, calibrate the OSCCAL register against a precision reference during factory test and store the calibration value in the last available OTP location. Software UART bit-banging can tolerate +/-3% for short packets under 8 bytes.
Thông tin tuân thủ
RoHS and lead-free per Microchip product page. AEC-Q100 not qualified (industrial grade, not automotive-grade). Conflict-minerals declaration compliant per Microchip CMRT.
