PIC12C509A-04I/MF - 8-bit 4MHz OTP MCU, 1.5KB, 8-DFN | Microchip
MPN: PIC12C509A-04I/MF ✗ Cuối đờiPIC12C509A-04I/MF Tóm tắt
An 8-bit microcontroller (MCU) is a small computer-on-a-chip integrating a CPU, memory (ROM/Flash/OTP and RAM), I/O peripherals, and timers on a single die. The PIC12C5XX family belongs to the baseline PIC12C microcontrollers, sitting in Microchip's hierarchy of 8-bit MCU -> microcontroller -> embedded processor -> semiconductor. These parts target cost-sensitive, space-constrained embedded control applications where simple RISC instruction sets and ultra-low pin counts outweigh the need for large memories.
Key features include 33 single-word/single-cycle instructions, an 8-bit real-time clock/counter (TMR0) with programmable prescaler, Power-On Reset (POR), Device Reset Timer (DRT), Watchdog Timer (WDT) with its own on-chip RC oscillator, and programmable code protection. The internal 4 MHz RC oscillator eliminates external clock components, reducing BOM cost. The 8-bit instruction word and 12-bit opcode architecture provide deterministic execution for real-time control loops.
Typical applications include automotive body electronics, industrial control, appliance control, sensor signal conditioning, and low-end consumer devices. With only 5 I/O pins available after accounting for VDD/VSS and reset, the part is best suited to simple state machines, timing-based controllers, and glue-logic replacement. The DFN-S 6x5 mm surface-mount package suits reflow assembly on compact PCBs, and the 04 MHz speed grade balances instruction throughput against power consumption in always-on applications.
When designing with this device, ensure the MCLR pin is properly handled (it can be left open in many cases due to internal weak pull-up), and that the WDT is either enabled in software or disabled via configuration bits. The OTP memory means firmware must be fully validated before programming; use the PIC12C509A JW UV-erasable windowed version for prototype development. Five I/O pins (GP0-GP4 with GP3 only available as input) must be allocated carefully between user I/O and the optional oscillator/reset functions.
This page synthesizes distributor pricing, drop-in same-package alternatives, comparison data, and practical design notes for the PIC12C509A-04I/MF that are not consolidated on any single manufacturer or distributor page, helping engineers evaluate replacements and design trade-offs in one place.
Bộ thay thế dễ dàng lắp đặt cho PIC12C509A-04I/MF — 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 PIC12C509A-04I/MF (cùng hình factor và footprint) — khác nhau ở Program Memory Size, Data EEPROM, Package, Core Architecture, I/O Pins.
PIC12C509A-04I/SM
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC12C509A-04I/SN
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC12C509A-04/SM
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC12C509A-04E/SM
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC12C509AT-04I/MF
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC12C509A-04I/MF Tỷ lệ tối đa & tính chất điện
| Core Processor | PIC |
| Core Size | 8-bit |
| Clock Speed | 4 MHz |
| Instruction Cycle | 1 microsecond |
| Program Memory | 1.5 KB (1K x 12) OTP |
| RAM Size | 41 x 8 bytes |
| Data EEPROM | 0 bytes |
| I/O Pins | 5 (GP0-GP2, GP4-GP5; GP3 input only) |
| Number of Instructions | 33 |
| Timers | TMR0 (8-bit) with 8-bit programmable prescaler |
| Watchdog Timer | Yes, with dedicated on-chip RC oscillator |
| Power-On Reset | Yes (POR) |
| Device Reset Timer | Yes (DRT) |
| Code Protection | Programmable |
| Oscillator | Internal 4 MHz RC |
| Điện áp cung cấp | 2.5 V to 5.5 V |
| Nhiệt độ hoạt động | -40C to +85C (Industrial) |
| Hộp | 8-DFN-S (6 x 5 mm) |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant |
Cấu hình chân PIC12C509A-04I/MF
| Chân 1 | VDD — Positive supply voltage (2.5V to 5.5V) |
| Chân 2 | GP5/OSC1 — General-purpose I/O or oscillator input |
| Chân 3 | GP4/OSC2 — General-purpose I/O or oscillator output |
| Chân 4 | GP3/MCLR — Input-only GPIO or Master Clear reset |
| Chân 5 | VSS — Ground reference |
| Chân 6 | GP0 — General-purpose I/O |
| Chân 7 | GP1 — General-purpose I/O |
| Chân 8 | GP2 — General-purpose I/O |
Ứng dụng tiêu biểu
PIC12C509A-04I/MF phù hợp cho 6 Áp dụngs: Automotive Body Electronics, Appliance Control (Washing Machines, Dishwashers, Microwaves), Sensor Signal Conditioning and Simple Data Acquisition, Battery-Powered Remote Controls and Wireless Key Fobs, Industrial Control and Simple PLC Sub-Modules, Toy and Low-End Consumer Electronics.
Automotive Body Electronics
The PIC12C509A-04I/MF suits low-cost automotive body controllers (lamp drivers, wiper timers, simple sensor interfaces) where its -40C to +85C industrial temperature range, 4 MHz instruction throughput, and 1 microsecond per-instruction cycle meet real-time control needs. The internal 4 MHz RC oscillator eliminates the external crystal, reducing BOM and assembly cost. With 1.5KB OTP code space and 5 I/O pins, it fits single-function body controllers (e.g., sequential turn signal, dome-light delay) but is not suitable for AEC-Q100 qualified safety-critical modules. A typical circuit places the MCU between a 12V-to-5V regulator and the load FET, with GP0/GP1 driving N-channel MOSFETs for high-side switching and the WDT enabled for field reliability.
Được đề xuất
Appliance Control (Washing Machines, Dishwashers, Microwaves)
In white goods and small appliances, the PIC12C509A-04I/MF is used for user-interface LED indicators, push-button debouncing, and timing control of pumps, valves, and buzzers. Its 33-instruction RISC core executes deterministic timing loops without an RTOS, while the 8-bit TMR0 with 8-bit prescaler supports 1 ms to 100 ms timing resolution needed for motor soft-start and pump cycle management. The 41-byte RAM is sufficient for state-machine control of 4-5 user inputs and 4-5 output drivers. A typical schematic uses GP3 as the panel button input, GP0/GP1 to drive TRIAC optocouplers, and the internal WDT to recover from AC-line brownouts.
Được đề xuất
Sensor Signal Conditioning and Simple Data Acquisition
The PIC12C509A-04I/MF works well for low-frequency sensor front-ends that need digital filtering, threshold detection, and digital output. Although the part lacks an ADC, the comparator or external analog front-end can feed GP0/GP1 directly, and the TMR0 captures period or pulse-width measurements. With 1 microsecond per instruction, the 4 MHz core samples at up to 1 MSPS for short bursts, sufficient for 100 Hz to 1 kHz industrial sensors. The 8-pin DFN-S package (6x5 mm) is small enough for in-line sensor modules. The internal WDT and POR handle noisy industrial environments.
Được đề xuất
Battery-Powered Remote Controls and Wireless Key Fobs
Low-power key fobs, garage door openers, and simple RF remote controls use the PIC12C509A-04I/MF to encode button presses via PWM or Manchester-encoded bit streams on a single GPIO. The 2.5V to 5.5V supply range supports 3V coin-cell or 2xAA operation, and the part's 1 microsecond instruction cycle generates accurate 38 kHz carrier frequencies for IR protocols or 433 MHz SAW-resonator sub-carriers. The internal WDT can wake the part from sleep on a button press, minimizing quiescent current. DFN-S 6x5 mm packaging suits miniaturized fob designs.
Được đề xuất
Industrial Control and Simple PLC Sub-Modules
In industrial control panels, the PIC12C509A-04I/MF can be deployed as an auxiliary 8-bit sub-controller for status LED drivers, push-button scanners, and isolated digital I/O expansion where 5 GPIO pins are sufficient. The industrial -40C to +85C rating handles cabinet environments, and the WDT with its own on-chip RC oscillator provides recovery from ESD or supply glitches common on factory floors. The OTP memory can hold pre-validated ladder-logic emulation code, and the part's 33-instruction RISC core produces deterministic scan times for predictable control behavior. A typical application pairs the MCU with an MCP1700 5V LDO and digital optocouplers for 24V field-interface isolation.
Được đề xuất
Toy and Low-End Consumer Electronics
Toys, educational electronics kits, and low-cost consumer products use the PIC12C509A-04I/MF for sound effect generation, motor PWM, LED pattern control, and simple I/O expansion. The 33-instruction RISC core is well documented in Microchip application notes (e.g., AN529) and easy for beginners to program. The 5 GPIO pins are sufficient for a 2-axis toy controller, a single-motor with direction logic, or a 5-LED Christmas decoration sequencer. The DFN-S 6x5 mm package is small enough for thin-profile toys, though hand-soldering requires hot air. PICkit programmers and MPLAB X IDE support the full PIC12C5XX family.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC12C509A-04I/MF — 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 | PIC12C509A-04I/SM | PIC12C509A-04I/SN | PIC12C509A-04/SM | PIC12C509A-04E/SM | PIC12C509AT-04I/MF |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 8-DFN-S (6x5 mm) | 8-SOIC (3.90 mm) - same 8-pin family | 8-SOIC (3.90 mm) - same 8-pin family | 8-SOIC (3.90 mm) - same 8-pin family | 8-SOIC (3.90 mm) - same 8-pin family | 8-DFN-S (6x5 mm) - identical |
| Core Processor | PIC 8-bit | PIC 8-bit | PIC 8-bit | PIC 8-bit | PIC 8-bit | PIC 8-bit |
| Clock Speed | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz |
| Program Memory | 1.5 KB OTP | 1.5 KB OTP | 1.5 KB OTP | 1.5 KB OTP | 1.5 KB OTP | 1.5 KB OTP |
| RAM Size | 41 bytes | 41 bytes | 41 bytes | 41 bytes | 41 bytes | 41 bytes |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | 0C to +70C (Commercial) | -40C to +125C (Extended) | -40C to +85C (Industrial) |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete |
Bảo phân biệt quan trọng
- 8-pin DFN-S (6x5 mm) for smallest PCB footprint in the PIC12C5XX baseline family (vsPIC12C509A-04I/SN)
- Industrial -40C to +85C operating temperature range (vsPIC12C509A-04/SM)
- Firmware and peripheral compatibility across the PIC12C5XX baseline family (vsPIC12C508A)
Ghi chú thiết kế
The PIC12C509A-04I/MF operates from 2.5V to 5.5V and draws approximately 2 mA active current at 4 MHz and 5V per the PIC12C5XX datasheet. For battery applications, use the SLEEP instruction (a 1 microsecond wake-up) and the internal WDT to wake periodically, reducing average current below 100 microamperes. A 0.1 microfarad ceramic bypass capacitor must be placed within 5 mm of the VDD pin per Microchip layout guidelines; adding a 10 microfarad bulk cap on the VDD rail is recommended for noisy industrial supplies.
GP3 is input-only because it is multiplexed with the MCLR reset pin - configuration bits must select MCLR or GP3 function, and once configured as GP3, the MCLR function is disabled. The OTP program memory can be programmed only once; for prototyping, use the PIC12C509A-04I/JW UV-erasable windowed version or switch to the Flash-based PIC12F509. The internal 4 MHz RC oscillator drifts approximately +/- 1 percent over voltage and temperature per the datasheet, so do not use it for UART baud-rate generation without calibration.
The 8-pin DFN-S (6x5 mm) package has a center exposed pad (EP) that must be soldered to the PCB land pattern for mechanical reliability and thermal dissipation. The DFN-S land pattern is NOT pin-to-pin compatible with the 8-pin SOIC land pattern, so a PCB designed for the SOIC-8 variants (e.g., PIC12C509A-04I/SN) will not accept the DFN-S MF variant without board rework. When migrating between the two, design two separate land patterns or use a footprint that supports both packages on different boards.
Thông tin tuân thủ
RoHS compliant per Microchip product page. Not AEC-Q100 qualified; the part is intended for industrial and consumer applications. PIC12C509A-04I/MF is listed as obsolete on the Microchip website as of 2026-09-14.
