PIC12LC508A-04I/P - 8-Bit 4MHz OTP MCU 768B | Microchip
MPN: PIC12LC508A-04I/P ✓ Hoạt độngPIC12LC508A-04I/P Tóm tắt
An 8-bit microcontroller (MCU) is a compact programmable processor that combines a CPU, non-volatile program memory (ROM/EPROM/OTP/Flash), volatile data RAM, and peripherals such as timers, reset, and I/O onto a single die. The PIC12C5xx family occupies the low-cost, small-pin-count tier of the PIC architecture hierarchy: PIC12C5xx -> 8-bit PIC MCUs -> PIC microcontrollers -> microcontrollers -> embedded processors -> semiconductors. Microcontrollers of this class are typically deployed as glue logic, sensor front-ends, and standalone control cores in cost-sensitive industrial and consumer products.
Key features include 4 MHz maximum operating frequency, a 1 microsecond instruction execution time, an 8-bit real-time counter (TMR0) with an 8-bit programmable prescaler, a Watchdog Timer (WDT) with its own on-chip RC oscillator, Power-On Reset (POR), Device Reset Timer (DRT), and an internal 4 MHz RC oscillator for low-BOM-count designs. The device operates from 2.5V to 5.5V across an industrial -40C to +85C temperature window.
Architecturally, the PIC12LC508A-04I/P uses a Harvard RISC core with separate program and data buses, achieving deterministic 1-cycle instruction execution at 4 MHz (250 ns per instruction). Its 12-bit-wide instruction word is optimized for compact code density rather than arithmetic width, which is typical for PIC baseline-class controllers where program memory is measured in 12-bit words rather than bytes.
Typical applications include low-cost consumer appliances, industrial sensor interfaces, LED controllers, simple motor control, automotive body electronics, and battery-powered or remote-control devices where the 8-pin footprint, OTP cost structure, and Microchip ecosystem support are decisive. The industrial temperature grade (-40C to +85C) extends usability to harsh enclosures and outdoor installations.
When designing with this part, note that the "LC" prefix denotes a wider operating voltage range (2.5V to 5.5V) versus the "C" 5V-only variant, and the "I" suffix marks the industrial temperature grade. Because the program memory is OTP (one-time-programmable), the PIC12LC508A-04I/P is best chosen for high-volume, locked-firmware designs; for field upgrades or design iteration, choose the PIC12F508 Flash equivalent.
Bộ thay thế dễ dàng lắp đặt cho PIC12LC508A-04I/P — 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 PIC12LC508A-04I/P (cùng hình factor và footprint) — khác nhau ở Core Architecture, Timers, Package, Program Memory Size, Watchdog Timer.
PIC12LC508A-04/P
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PIC12C508A-04I/P
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| Core Architecture | 8-bit PIC RISC (Harvard) |
| Instruction Set Width | 12-bit |
| Number of Instructions | 33 (single-word, single-cycle) |
| Tần số xung maksimum | 4 MHz |
| Instruction Execution Time | 1 microsecond (at 4 MHz) |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 768 bytes (512 x 12-bit words) |
| Data RAM | 25 bytes |
| I/O Pins | 6 |
| Supply Voltage Range | 2.5 V to 5.5 V |
| Khoảng nhiệt độ hoạt động | -40 C to +85 C (Industrial) |
| Hộp | 8-pin PDIP (300 mil) |
| Kiểu lắp đặt | Through-Hole |
| Timers | TMR0 (8-bit) with 8-bit programmable prescaler |
| Watchdog Timer | Yes, with dedicated on-chip RC oscillator |
| Reset Features | Power-On Reset (POR), Device Reset Timer (DRT) |
| Internal Oscillator | 4 MHz RC (on-chip) |
| Cấp MSL | 1 (unlimited floor life) |
| Trạng thái RoHS | Compliant |
| Trạng thái vòng đời | Active |
Cấu hình chân PIC12LC508A-04I/P
| Chân 1 | VDD — Positive supply voltage (2.5V to 5.5V) |
| Chân 2 | GP5/OSC1/CLKIN — General-purpose I/O / oscillator input / external clock input |
| Chân 3 | GP4/OSC2/CLKOUT — General-purpose I/O / oscillator output / clock output |
| Chân 4 | GP3/MCLR/VPP — General-purpose input / Master Clear reset (active-low) / programming voltage |
| Chân 5 | GP2/T0CKI — General-purpose I/O / TMR0 clock input |
| Chân 6 | GP1 — General-purpose I/O |
| Chân 7 | GP0 — General-purpose I/O |
| Chân 8 | VSS — Ground reference |
Ứng dụng tiêu biểu
PIC12LC508A-04I/P phù hợp cho 6 Áp dụngs: Low-Cost Consumer Appliance Controller, LED Lighting Controller, Industrial Sensor Interface Module, Remote Control and Battery-Powered Devices, Automotive Body Electronics, Hobbyist and Educational Embedded Projects.
Low-Cost Consumer Appliance Controller
The PIC12LC508A-04I/P fits small consumer appliances (toasters, blenders, coffee makers) where the 8-pin PDIP footprint, 2.5V-5.5V supply range, 25B RAM, and 6 I/O pins provide enough control for relay, button, and LED interfaces. At $1.04 per unit (qty 1000, as of 2026-09-16), the OTP cost structure supports high-volume locked-firmware designs, while the industrial -40C to +85C temperature grade tolerates kitchen thermal stress. The on-chip 4 MHz RC oscillator removes the need for an external crystal, BOM-count is minimal, and the 33-instruction baseline RISC core delivers deterministic 1 microsecond per instruction for simple state-machine control loops.
Được đề xuất
LED Lighting Controller
The PIC12LC508A-04I/P drives simple LED controllers (single-channel dimmers, status indicators, decorative lighting) where its 6 I/O pins connect directly to MOSFET gate drivers, push-buttons, and PWM-tied LEDs. The 4 MHz core provides enough bandwidth for software PWM at kHz frequencies, while the 25B RAM and 768B OTP support pattern tables and fade curves. The 2.5V-5.5V supply lets the part run from a 3.3V regulator shared with LED strings, and the industrial temperature range accommodates enclosed fixture thermal rise. Compared to a discrete logic solution, the OTP MCU lowers BOM and increases flexibility.
Được đề xuất
Industrial Sensor Interface Module
The PIC12LC508A-04I/P serves as a sensor-interface MCU in industrial modules (4-20 mA loop transmitters, simple transducer conditioners, contact-debounce interfaces) where the industrial -40C to +85C temperature range is mandatory for factory-floor and outdoor enclosures. Its 6 I/O pins handle digital sensors, switch inputs, and UART/emulated serial, while the 25B RAM and 768B OTP are sufficient for calibration tables and protocol framing. The 2.5V-5.5V supply tolerates unregulated 24V industrial rails via an LDO, and the PIC RISC architecture ensures deterministic interrupt latency for real-time polling loops.
Được đề xuất
Remote Control and Battery-Powered Devices
The PIC12LC508A-04I/P is well-suited to remote controls, key fobs, and 2xAA-cell battery-powered devices because its 2.5V-5.5V supply range spans the full NiMH/alkaline discharge curve and its baseline RISC core consumes only a few milliamps active. The 8-pin PDIP through-hole package is friendly to hobbyist and educational assembly, while the 4 MHz internal RC oscillator removes the need for an external resonator. The 768B OTP holds small fixed command sets, and the 25B RAM supports button-debounce state machines. The industrial temp range ensures reliable operation in outdoor remote transmitters across seasonal extremes.
Được đề xuất
Automotive Body Electronics
The PIC12LC508A-04I/P handles non-safety automotive body electronics (interior lighting, simple wiper timers, accessory controllers) where its industrial -40C to +85C temperature range meets cabin thermal requirements and the 8-pin PDIP is acceptable for through-hole accessory modules. The on-chip watchdog timer with its own RC oscillator is independent of the system clock and resets the MCU on code-lockup. The 2.5V-5.5V supply supports 12V-bus-derived 5V rails. Note: For under-hood or safety-critical automotive designs, an AEC-Q100-qualified part must be selected instead; the LC508A-04I/P itself is not AEC-Q100 qualified.
Được đề xuất
Hobbyist and Educational Embedded Projects
The PIC12LC508A-04I/P is a canonical entry point for hobbyist and educational projects (introductory embedded courses, blinky-LED tutorials, simple robotics controllers) because of its 8-pin PDIP through-hole package that fits breadboards and through-hole prototyping boards. The 4 MHz internal RC oscillator, 33-instruction baseline RISC core, and free MPLAB X IDE + XC8 toolchain create a low-friction learning environment. The 25B RAM and 768B OTP are large enough for blinking-LED, debounced-button, servo-pulse, and serial-echo exercises but small enough to force disciplined coding. The $1.04 unit price at qty 1000 (as of 2026-09-16) keeps classroom kits affordable.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC12LC508A-04I/P — 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 | PIC12LC508A-04/P | PIC12C508A-04I/P | PIC12C508A-04/P | PIC12F508-I/P |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 8-pin PDIP (300 mil) | 8-pin PDIP (300 mil) - same | 8-pin PDIP (300 mil) - same | 8-pin PDIP (300 mil) - same | 8-pin PDIP (300 mil) - same |
| Program Memory | 768B OTP (512 x 12) | 768B OTP (same) | 768B OTP (same) | 768B OTP (same) | 768B Flash (same density) |
| Data RAM | 25 bytes | 25 bytes | 25 bytes | 25 bytes | 25 bytes |
| I/O Pins | 6 | 6 | 6 | 6 | 6 |
| Supply Voltage Range | 2.5V to 5.5V | 2.5V to 5.5V | 4.0V to 5.5V (5V only) | 4.0V to 5.5V (5V only) | 2.0V to 5.5V |
| Operating Temperature | -40C to +85C (Industrial) | 0C to +70C (Commercial) | -40C to +85C (Industrial) | 0C to +70C (Commercial) | -40C to +85C (Industrial) |
| Memory Type | OTP | OTP | OTP | OTP | Flash (1000 cycles) |
| Max Clock Frequency | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz |
| Approx. Unit Price (qty 1000) | $1.04 | $0.90 (lower temp grade) | $1.05 (5V only) | $0.85 (5V, commercial) | $1.20 (Flash premium) |
Bảo phân biệt quan trọng
- Lowest unit cost at qty 1000 among industrial-grade PIC12C5xx 8-pin PDIP OTP MCUs (vsPIC12F508-I/P)
- Wider supply voltage range than the C-only variant (vsPIC12C508A-04I/P)
- Industrial temperature range on a PDIP-only 8-pin footprint (vsPIC12LC508A-04/P)
- Internal 4 MHz RC oscillator eliminates external crystal BOM (vsPIC12F675-I/P)
Ghi chú thiết kế
The PIC12LC508A-04I/P draws a few milliamps active at 4 MHz and drops to microamp-level sleep current on WDT or full sleep, but the baseline core lacks true nanoWatt features - for battery applications demanding <1 microA standby, evaluate the PIC12F519-I/P (Flash equivalent with nanoWatt) or the PIC12F635-I/P (nanoWatt with EEPROM). The 2.5V-5.5V supply range covers NiMH/alkaline discharge curves directly without an LDO, simplifying battery-powered designs. Add a 100 nF decoupling cap as close to VDD pin 1 as possible to suppress digital switching noise that can corrupt TMR0 captures.
Two common pitfalls deserve emphasis. First, OTP memory is one-time-programmable - once a PIC12LC508A-04I/P is programmed, the firmware is locked and cannot be erased. For design iteration or field updates, choose the PIC12F508-I/P Flash equivalent, which retains the same 8-pin PDIP footprint, 768B code space, and 25B RAM. Second, the MCLR/GP3 pin (pin 4) is shared between general-purpose input, master-clear reset, and programming-voltage input - tying it directly to VDD without a resistor can prevent in-circuit serial programming (ICSP). Always use a 10 kohm pull-up on MCLR per Microchip baseline recommendations.
The 8-pin PDIP package simplifies PCB layout compared to surface-mount variants - the through-hole pads accommodate large annular rings, hand-soldering, and breadboard prototyping. Keep the decoupling capacitor trace to VDD under 5 mm to limit lead inductance at the 4 MHz switching harmonics. If using the on-chip RC mode rather than a crystal, leave OSC1 and OSC2 (GP5/GP4) free as GPIO and avoid long traces. For designs requiring AES-Q100, automotive EMI/ESD performance, or -40C to +125C operation, the PIC12LC508A-04I/P is not qualified and you must select an AEC-Q100 part number instead.
Thông tin tuân thủ
RoHS and REACH compliant per Microchip product page. Lead-free PDIP terminations. Halogen-free. NOT AEC-Q100 qualified - for automotive under-hood or safety-critical applications, an AEC-Q100 qualified part must be selected.
