PIC12LC509A-04I/P - 8-bit 4MHz OTP MCU, 1.5KB | Microchip
MPN: PIC12LC509A-04I/P ✓ فعالPIC12LC509A-04I/P جائزہ
An 8-bit microcontroller (MCU) is a single-chip processor that integrates a CPU, memory, and peripherals onto one silicon die. The PIC12C5xx family belongs to the broader PIC microcontroller hierarchy: 8-bit MCU -> microcontroller -> embedded processor -> semiconductor. These MCUs use a RISC (Reduced Instruction Set Computer) architecture that prioritizes a small, fixed-length instruction set for deterministic execution, making them well-suited for cost-sensitive real-time control applications where predictability matters more than raw computational throughput.
Key features include a hardware 8-bit timer/counter (TMR0) with programmable prescaler, an on-chip Watchdog Timer (WDT) backed by its own dedicated RC oscillator for reliable operation independent of the main clock, Power-On Reset (POR), Device Reset Timer (DRT), and programmable code protection. The device also supports in-circuit serial programming (ICSP) via two pins, enabling firmware updates without removing the part from the board.
The architecture combines a Harvard-style separated program/data bus with a 12-bit-wide instruction word, which is wider than typical 8-bit data to embed literal operands and reduce fetch count. The LC suffix designates the low-voltage CMOS process, allowing reliable operation down to 2.5V for battery-powered designs where a standard PIC12C509A (4.0V-5.5V only) would not function.
Typical applications include appliance control boards, automotive sub-system modules, industrial sensor interfaces, battery-powered smart sensors, security system peripherals, and general-purpose logic replacement. Its 8-pin footprint makes it ideal for space-constrained retrofits and cost-down conversions from discrete logic.
When designing with this MCU, ensure the MCLR pin is pulled high through a proper resistor-capacitor network and provide adequate decoupling (100nF) on VDD. Programming voltage on the GP0/GP1 ICSP pins must respect the absolute maximum ratings to avoid damaging the part during repeated development cycles.
This page synthesizes distributor pricing, drop-in alternatives, application circuits, and practical design notes that go beyond what the manufacturer datasheet alone provides, organized specifically for engineering selection and procurement workflows.
کے لیے ڈراپ اِن متبادل PIC12LC509A-04I/P — یکساں پیکیج، پن سے پن مطابقت پذیر۔ مختلف پیکیج والے پرزے جن کے لیے PCB دوبارہ کام درکار ہو، شامل نہیں ہیں۔
اس سیریز میں مختلف ورژن
اسی سیریز کے ماڈلز جو ڈراپ اِن مطابقت رکھتے ہیں PIC12LC509A-04I/P (یکساں فارم فیکٹر اور فٹ پرنٹ) — میں مختلف Package, Mounting Type, Program Memory Size, Instruction Cycle Time, Instruction Set.
PIC12C509A-04I/P
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ڈیٹا شیٹ دیکھیں →PIC12LC509A-04E/P
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PIC12C509A-04/P
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PIC12LC509A-04I/P زیادہ سے زیادہ ریٹنگز اور برقی خصوصیات
| Core Processor | PIC |
| Core Size | 8-Bit |
| Maximum Clock Speed | 4 MHz |
| Program Memory Size | 1.5 KB (1K x 12) OTP |
| RAM Size | 41 bytes |
| Number of I/O Pins | 6 |
| Supply Voltage Range | 2.5 V to 5.5 V (LC variant) |
| آپریٹنگ درجہ حرارت رینج | -40 C to +85 C (industrial, 'I' suffix) |
| پیکیج | 8-PDIP (0.300 inch / 7.62 mm) |
| Instruction Set | 33 single-word/single-cycle instructions |
| Instruction Execution Time | 200 ns @ 4 MHz |
| Timer/Counters | 1 x 8-bit TMR0 with programmable prescaler |
| Watchdog Timer | Yes, dedicated on-chip RC oscillator |
| Power-On Reset (POR) | Yes |
| Device Reset Timer (DRT) | Yes |
| Code Protection | Programmable |
| ICSP (In-Circuit Serial Programming) | Yes (via GP0/GP1) |
| Program Memory Endurance | 1,000,000 erase/write cycles |
| ماؤنٹنگ ٹائپ | Through-Hole |
| RoHS اسٹیٹس | Compliant |
PIC12LC509A-04I/P پن کنفیگریشن
| پن 1 | VDD — Positive supply voltage (2.5V-5.5V) |
| پن 2 | GP5/OSC1/CLKIN — GPIO 5 / Oscillator input / External clock input |
| پن 3 | GP4/OSC2/CLKOUT — GPIO 4 / Oscillator output / Clock output |
| پن 4 | GP3/MCLR/VPP — GPIO 3 / Master Clear (Reset) input / Programming voltage |
| پن 5 | GP2/T0CKI/INT/COUT — GPIO 2 / Timer0 clock input / External interrupt / Comparator output |
| پن 6 | GP1/CIN-/ICSPCLK — GPIO 1 / Comparator inverting / ICSP clock |
| پن 7 | GP0/CIN+/ICSPDAT — GPIO 0 / Comparator non-inverting / ICSP data |
| پن 8 | VSS — Ground reference |
عام استعمالات
PIC12LC509A-04I/P کے لیے موزوں ہے 6 ایپلیکیشنs: Battery-Powered Sensor Node Controller, Automotive Sub-System Module Controller, Appliance Control Board Replacement, Cost-Down Logic Replacement / Glue Logic, Security System Peripheral Controller, Educational / Hobbyist Microcontroller Platform.
Battery-Powered Sensor Node Controller
The PIC12LC509A-04I/P's 2.5V minimum supply enables direct operation from a single 3V CR2032 or two AA alkaline cells down to their end-of-life voltage, eliminating boost converters. Its 4MHz maximum clock and 200ns instruction execution let it poll sensors, run control loops, and enter sleep mode within strict energy budgets. The 41-byte RAM accommodates small state buffers for duty-cycled wireless or wired sensor nodes in environmental monitoring and IoT edge devices where 6 GPIO suffice for SPI/I2C bit-banging or simple LED/HMI control.
تجویز کردہ
Automotive Sub-System Module Controller
The PIC12LC509A-04I/P is used in non-safety automotive sub-systems where its industrial -40C to +85C temperature grade and automotive-rated supply tolerance meet cabin and under-hood sensor requirements. Its 6 GPIO can drive relay coils, read switches, and interface LIN-bus transceivers at bit-banged rates, while the dedicated WDT with its own RC oscillator ensures recovery from software lockups. The 1.5KB OTP provides sufficient headroom for state-machine control firmware in lighting, accessory, and body-electronics modules.
تجویز کردہ
Appliance Control Board Replacement
In white-goods and small appliance controls, the PIC12LC509A-04I/P replaces legacy 8-bit discrete-logic boards by integrating timing, sequencing, and user-input handling in one chip. Its 8-bit TMR0 with programmable prescaler drives wash-cycle, defrost, and timer functions deterministically, while 6 GPIO drive triac interfaces, read keypads, and control indicator LEDs. The PIC RISC architecture's deterministic 200ns instruction cycle keeps real-time loops jitter-free - critical for zero-cross triac switching that minimizes EMI in motor and heater loads.
تجویز کردہ
Cost-Down Logic Replacement / Glue Logic
When 7400-series discrete logic gates, timers (555), or shift registers would require multiple packages, the PIC12LC509A-04I/P consolidates equivalent functionality into a single 8-pin MCU costing under $1 in volume. Engineers port a small state machine into 1.5KB of OTP, reducing PCB area and BOM count. Common replacements include one-shots, monostables, sequence detectors, and simple protocol converters where the PIC's 4MHz instruction rate is more than adequate for ms-scale timing requirements.
تجویز کردہ
Security System Peripheral Controller
Peripheral devices in security panels - such as remote keypads, PIR-sensor interface boards, and low-power wireless receiver modules - use the PIC12LC509A-04I/P for local I/O handling and tamper detection. Its hardware watchdog timer, power-on reset, and code protection together provide the security primitives required to resist firmware extraction and lockup recovery. The 8-pin PDIP footprint and low pin count suit compact PCB layouts inside sensor housings.
تجویز کردہ
Educational / Hobbyist Microcontroller Platform
The PIC12LC509A-04I/P is a popular teaching platform for first-time embedded programmers because its 8-pin PDIP through-hole form factor fits standard breadboards and its 33-instruction RISC architecture is easy to learn. Educational labs use it to teach timer interrupts, GPIO bit manipulation, and watchdog reset behavior without requiring surface-mount soldering. Its low cost (under $2 in unit quantities) and broad hobbyist ecosystem of PIC programmers, ICD debuggers, and example code make it a staple in microcontroller training.
تجویز کردہ
تجویز کردہ پروڈکٹس کا خلاصہ
کے لیے انجینئرنگ ریفرنس ڈیٹا PIC12LC509A-04I/P — موازنہ، ڈیزائن رہنمائی، اور تعمیل کی معلومات۔
انتخاب کی گائیڈ
متبادلات کے ساتھ موازنہ
| پیرامیٹر | یہ پروڈکٹ | PIC12C509A-04I/P | PIC12LC509A-04I/SM | PIC12LC509A-04E/P | PIC12C509A-04/P | PIC12C509A-04I/JW |
|---|---|---|---|---|---|---|
| Package | 8-PDIP | 8-PDIP - same | 8-SOIJ - different (SMT) | 8-PDIP - same | 8-PDIP - same | 8-CDIP (windowed) - different |
| Brand | 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 | 1.5 KB EPROM |
| Max Clock Speed | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz |
| Supply Voltage Range | 2.5 V to 5.5 V | 4.0 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 4.0 V to 5.5 V | 4.0 V to 5.5 V |
| Operating Temperature | -40 C to +85 C (I grade) | -40 C to +85 C | -40 C to +85 C | -40 C to +125 C (E grade) | 0 C to +70 C (commercial) | -40 C to +85 C |
| I/O Pins | 6 | 6 | 6 | 6 | 6 | 6 |
| Unit Price (qty 1) | $1.65 | $1.55 | $1.62 | $1.80 | $1.45 | $14.50 (windowed, prototype) |
اہم امتیازی خصوصیات
- Wider low-voltage supply range than PIC12C509A (بمقابلہPIC12C509A-04I/P)
- Extended temperature grade option (E suffix) (بمقابلہPIC12LC509A-04I/P (industrial -40 to +85C))
- OTP memory in PDIP for low-cost prototyping (بمقابلہPIC12F509-I/P (Flash, 8-PDIP))
ڈیزائن نوٹس
Estimated: The PIC12LC509A-04I/P typical active current at 4MHz/5V is ~2.0 mA and at 2.5V/32kHz (LF mode) drops to ~14 uA. Place a 100nF ceramic decoupling capacitor as close as possible to the VDD pin (pin 1) with a ground return via the shortest possible path to VSS (pin 8). For battery applications, switch to the internal 32.768 kHz LF oscillator and use sleep mode aggressively; this can reduce average current below 1 uA in duty-cycled sensor designs. The WDT has its own RC oscillator and continues running in sleep - enable it to wake the MCU from sleep on overflow.
The 8-PDIP through-hole footprint is 0.300 inch (7.62 mm) row spacing with 0.100 inch (2.54 mm) pin pitch - same as the standard 7400-series DIP. Route the MCLR/VPP pin (pin 4) away from high-frequency switching nodes to avoid spurious resets; a 10k pull-up to VDD plus a 100nF cap to ground forms the standard reset network. Place the crystal or resonator close to OSC1/OSC2 (pins 2/3) and guard the traces with a grounded copper pour to minimize EMI coupling. When using ICSP, dedicate the GP0/GP1 pins and isolate them from heavy loads so programming does not conflict with application circuitry.
Three common mistakes: (1) Assuming the LC and C variants are interchangeable below 4.0V - the PIC12C509A will fail to execute below 4.0V; use the LC variant explicitly. (2) Forgetting to disable the WDT in software or hardware config bits - if the WDT overflows in development, the MCU resets unexpectedly and looks like a code bug. (3) Programming OTP parts in-circuit without proper VPP isolation - the MCLR/VPP pin must be able to rise to ~13V during ICSP programming, and any external circuitry that clamps this pin below 13V will prevent programming.
Keep analog and digital grounds separated if the design interfaces with the on-chip comparator via GP0/GP1 - the datasheet recommends a star-ground configuration with the MCU VSS pin as the single tie-point. For RC oscillator mode (cheapest, lowest power), the OSC1 pin is the only analog concern; bypass it from high-current switching. In noisy environments, place a 4.7k pull-up on MCLR and a 100nF cap to ground directly at the pin - the rise time of MCLR determines the Power-On Reset behavior.
تعمیل کی معلومات
RoHS compliant per DigiKey product listing. Industrial temperature grade (-40C to +85C) but not AEC-Q100 qualified - for AEC-Q100 automotive applications, Microchip recommends PIC12F615-I/P or PIC12HV615-I/P.
