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PIC12LC508A-04I/MF

PIC12LC508A-04I/MF - 8-Bit 4MHz OTP MCU 768B | Microchip

The Microchip Technology PIC12LC508A-04I/MF is an 8-bit CMOS PIC12C5xx-family microcontroller with 768 bytes (512 x 12) of One-Time Programmable (OTP) program memory, 25 bytes of RAM, and 6 I/O pins, housed in an 8-pin DFN (3x3 mm) package. It executes instructions at a 4 MHz maximum clock rate with a 1 microsecond instruction cycle, and operates across an industrial temperature range of -40C to +85C. What is a PIC12C5xx microcontroller? It is a low-cost, high-performance, fully static 8-bit RISC microcontroller family from Microchip Technology using 12-bit wide instructions. The PIC12C5xx family sits within the broader 8-bit PIC microcontroller hierarchy: PIC12C5xx -> PIC10/12/16 family -> 8-bit PIC microcontrollers -> Microcontrollers (MCU) -> Integrated Circuits (ICs) -> Semiconductors. The architecture employs a RISC instruction set of 33 single-word/single-cycle instructions, providing approximately 2:1 code compression versus competing 8-bit MCUs and reducing development time for embedded engineers. Key features include an 8-bit real-time clock/counter (TMR0) with an 8-bit programmable prescaler, Power-On Reset (POR), Device Reset Timer (DRT), a Watchdog Timer (WDT) with its own on-chip RC oscillator for reliable operation, programmable code protection, and 1,000,000 erase/write endurance cycles. The "LC" device variant indicates the low-power CMOS process supporting the full industrial temperature range, while the "-04I" suffix denotes a 4 MHz maximum oscillator frequency and industrial (-40C to +85C) operating range. Typical applications span automotive subsystems (sensor interfaces, simple actuator controllers), industrial automation (small logic-replacement controllers, smart sensors), appliance controls (white-goods user interfaces, timing controllers), and low-cost consumer products (toys, remote controls, LED controllers). The 8-pin DFN package suits compact PCB designs where board area is at a premium. Design considerations: when migrating firmware between PIC12LC508A and PIC12C508A variants, confirm the oscillator calibration and supply-voltage range are compatible. The DFN exposed pad must be soldered to the board for proper thermal dissipation and mechanical reliability. Always configure the WDT prescaler to balance recovery time against system latency.

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PIC12LC508A-04I/P

PIC12LC508A-04I/P - 8-Bit 4MHz OTP MCU 768B | Microchip

The Microchip Technology PIC12LC508A-04I/P is an 8-bit, 4 MHz, low-cost CMOS OTP microcontroller from the PIC12C5xx family, packaged in an 8-pin PDIP (through-hole) and qualified to the industrial temperature range. It integrates 768 bytes of program memory (512 x 12-bit wide OTP words), 25 bytes of data RAM, and 6 I/O pins on a fully static RISC core that executes 33 single-word, single-cycle instructions. 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.

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PIC12LC508A-04I/SM

PIC12LC508A-04I/SM - 4MHz 8-bit OTP MCU 768B | Microchip

The Microchip PIC12LC508A-04I/SM is an 8-bit RISC CMOS microcontroller from the PIC12C family, operating at up to 4 MHz with 768 bytes (512 x 12) of One-Time Programmable (OTP) program memory and 25 bytes of data RAM, housed in an 8-pin SOIJ package. It features 6 general-purpose I/O pins, an 8-bit real-time clock/counter (TMR0) with an 8-bit programmable prescaler, Power-On Reset (POR), Device Reset Timer (DRT), and a Watchdog Timer (WDT) with its own dedicated on-chip RC oscillator for reliable operation. An 8-bit microcontroller (MCU) is a small computing system-on-a-chip integrating a CPU, memory (program ROM/RAM), and peripherals on a single die. The PIC12LC508A belongs to the broader hierarchy of microcontroller -> embedded controller -> semiconductor IC, and uses a RISC (Reduced Instruction Set Computer) architecture with only 33 single-word single-cycle instructions, delivering 1 MIPS performance at 4 MHz - an order of magnitude higher throughput than competing 8-bit MCUs of its generation. Key features of the PIC12LC508A-04I/SM include 6 I/O pins with individual direction control, a programmable WDT for code-execution safety, built-in Power-On Reset and Brown-out detection, in-circuit serial programming (ICSP) capability, and an extended industrial temperature range of -40C to +85C. Code protection is programmable to safeguard firmware IP, and the device supports up to 1,000,000 erase/write cycles on Flash variants of the family. The architecture is built on low-power CMOS technology with a wide 2.5 V to 5.5 V supply range, making the LC variant well-suited for battery-powered applications. Its 33-instruction RISC core executes most instructions in a single cycle (1 microsecond at 4 MHz), with only program branches taking two cycles. The integrated WDT with a separate on-chip RC oscillator ensures the device can recover from code faults without external components. Typical applications include low-cost consumer appliances, automotive subsystems (body controllers, sensor interfaces), industrial control logic, battery-powered embedded devices, LED drivers, and remote-control transmitters/receivers. The small SOIJ-8 footprint is ideal for space-constrained PCB designs. When designing with this MCU, allocate pin 4 (GP3/MCLR) carefully because it doubles as the Master Clear reset input; for reset-only applications a pull-up resistor is required. The OTP memory means firmware cannot be updated in the field - design with engineering samples and finalize firmware before OTP programming. This page synthesizes distributor pricing from DigiKey, Mouser, LCSC and Octopart, drop-in alternatives in the SOIJ-8 footprint, and practical design notes not consolidated on any single manufacturer or distributor page.

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PIC12LC508A-04I/SN

PIC12LC508A-04I/SN - 8-bit 4MHz MCU 768B OTP 25B RAM SOIC-8 | Microchip

The Microchip Technology PIC12LC508A-04I/SN is an 8-bit RISC CMOS microcontroller in an 8-pin SOIC package, operating at up to 4 MHz with 768 bytes of One-Time-Programmable (OTP) program memory and 25 bytes of data RAM. The "LC" suffix denotes the extended low-voltage variant supporting 2.5 V to 5.5 V operation, while the "04" speed grade specifies a 4 MHz maximum clock and the "I" grade specifies an industrial temperature range of -40 C to +85 C. An 8-bit microcontroller is a single-chip computer built around an 8-bit data path, register file, ALU, and integrated program/data memory plus peripherals. The PIC12LC508A belongs to the PIC10/12/16 mid-range family, sitting hierarchically as: 8-bit MCU -> RISC microcontroller -> PIC12C5xx baseline family -> CMOS OTP MCU -> embedded controller. It uses a Harvard architecture with separate program and data buses, a 33-instruction RISC ISA, and 12-bit wide instructions, delivering approximately 2:1 code compression over comparable 8-bit CISC MCUs. Single-cycle instruction execution (1 us at 4 MHz) makes throughput 4x that of legacy 8-bit peers. Key features include 6 general-purpose digital I/O pins, an 8-bit real-time clock/counter (TMR0) with 8-bit 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 wide 2.5 V to 5.5 V supply range simplifies battery-powered and 3.3 V system designs. Typical applications include low-cost consumer appliances, remote controls, sensor signal conditioning, battery management, LED driving logic, automotive body electronics, and simple state machines. Industrial temperature qualification allows deployment in harsh environments without derating. When designing, leave GP3 configured as input-only or MCLR reset per datasheet, and respect the 25-byte RAM limit when selecting an RTOS or large stack frames. The OTP memory requires a device programmer (e.g., PICkit) for firmware loading. This page synthesizes distributor pricing, drop-in compatible alternatives, and practical design notes not found in the manufacturer datasheet alone.

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PIC12LC508AT-04/SM

PIC12LC508AT-04/SM - 8-bit MCU, 768B OTP, 4MHz | Microchip

The Microchip Technology PIC12LC508AT-04/SM is an 8-bit CMOS microcontroller from the PIC PIC® 12C family, featuring 768 bytes (512 x 12) of One-Time-Programmable (OTP) program memory, 25 bytes of data RAM, and a maximum CPU clock frequency of 4 MHz, housed in an 8-pin SOIJ (208-mil, 0.209 inch / 5.30 mm width) surface-mount package. This part is the low-voltage (LC) variant of the PIC12C508A, qualified for operation across 2.5 V to 5.5 V supply, making it suitable for battery-powered applications where standard PIC12C parts (4.0 V to 6.0 V) would be unsuitable. The IC integrates a RISC-style PIC CPU core, six general-purpose digital I/O pins, an 8-bit timer/counter (TMR0) with an 8-bit programmable prescaler, Power-On Reset (POR), Device Reset Timer (DRT), Watchdog Timer (WDT) with its own on-chip RC oscillator, and programmable code protection supporting up to 1,000,000 erase/write cycles. What is an 8-bit OTP microcontroller? An OTP microcontroller is a single-chip computer that stores its program in non-volatile memory that can be written exactly once (or a limited number of times during production programming), as opposed to flash-based MCUs that can be re-written in-circuit thousands of times. The PIC12LC508A belongs to the 8-bit microcontroller hierarchy -> RISC microcontroller -> PIC architecture -> Microchip 12C family, and is positioned at the lowest-cost end of Microchip's portfolio for high-volume, space-constrained applications. Key differentiating features of the PIC12LC508AT-04/SM include its ultra-small 8-pin SOIJ footprint with 1.27 mm pitch, low-voltage 2.5 V to 5.5 V operation, six bidirectional I/O lines that share package pins with GP0-GP5, and a 33-instruction RISC instruction set with 12-bit-wide opcode. The architecture is Harvard (separate program/data buses), and a two-stage pipeline delivers near 1 MIPS throughput per MHz, so the 4 MHz oscillator yields approximately 1 MIPS of sustained execution. The internal 4 MHz RC option (calibrated) further reduces external component count. From an application perspective, the PIC12LC508AT-04/SM is best understood as a glue-logic replacement and ultra-low-cost control engine. It targets designs that previously used discrete 555 timers, transistor logic, or small ASICs and need firmware flexibility. The wide operating range and OTP program memory make it appropriate for one-time-programmed production devices where firmware does not need field upgrades. Typical applications include low-power consumer electronics, simple sensor signal conditioning, LED driver controllers, toy and hobby electronics, smart-card peripherals, battery chargers, remote-control transmitters/receivers, low-end appliance control, automotive body controllers (non-safety), and personal-care devices such as electric toothbrushes. Six I/O pins are sufficient for keypad scanning, relay drive, PWM-style LED control via the TMR0 prescaler, or serial-bit-banged protocols. Design considerations include the OTP nature of the program memory (no field re-programmability), the need for an in-system-serial-programming (ICSP) header to load code during manufacturing, supply-decoupling capacitor selection, and WDT configuration to handle software lock-up conditions. According to Microchip's PIC12C508A/LC508A datasheet (DS40186E-family), the device supports in-circuit debugging via ICD and the standard PICkit programming toolchain. This page synthesizes distributor pricing, drop-in same-package alternatives, datasheet pin assignments, and design considerations beyond the manufacturer datasheet to support engineer selection and sourcing.

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PIC12LC508AT-04/SN

PIC12LC508AT-04/SN - 8-bit PIC MCU, 768B OTP, 4MHz, 8-SOIC | Microchip

The Microchip Technology PIC12LC508AT-04/SN is an 8-bit CMOS RISC microcontroller from the PIC12C family, featuring 768 bytes (512 x 12) of One-Time-Programmable (OTP) program memory and 25 bytes of data RAM. It runs at a maximum clock frequency of 4MHz and is housed in an 8-pin SOIC package. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, data RAM, and peripheral interfaces into one IC. The PIC12C series from Microchip belongs to the broader category of 8-bit microcontrollers -> microcontrollers -> embedded processors -> semiconductors. These compact MCUs are widely used as glue logic, simple control engines, and low-cost programmable devices in commercial and industrial products. Key specifications include 6 I/O pins, a wide operating voltage range of 2.5V to 5.5V, an operating temperature range of 0°C to +70°C, and built-in peripherals such as 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, and programmable code protection. The OTP memory allows one-time field programming and is ideal for low-to-medium volume production. Architecturally, the device uses a Harvard RISC core with a 12-bit wide instruction word, enabling compact code density and deterministic single-cycle instruction execution (except branches). The 'LC' variant designation denotes the extended low-voltage operating range optimized for battery-powered and 3.3V systems. The 'AT' suffix indicates the industrial tape-and-reel packaging orientation, while '04' specifies the 4MHz maximum clock speed, and 'SN' indicates the 8-pin SOIC package. Typical applications include low-cost consumer electronics, battery-powered devices, simple sensor interfaces, LED driving and lighting controllers, timer/replacement circuits, and embedded control in white goods. The compact 8-pin footprint makes it well-suited for space-constrained designs that require more flexibility than pure hardware logic but don't justify larger 14- or 20-pin microcontrollers. When designing with this MCU, note that OTP memory cannot be reprogrammed - firmware must be fully verified before programming. For development cycles requiring iteration, consider PIC12F508 (Flash-based, drop-in replacement) or PIC12C508A (windowed EPROM version). The 4MHz clock limits instruction throughput to approximately 1 MIPS. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, providing procurement and engineering value beyond the original PIC12LC508AT-04/SN datasheet PDF.

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PIC12LC508AT-04I/SM

PIC12LC508AT-04I/SM - 4MHz 8-Bit OTP MCU, 768B | Microchip

The Microchip Technology PIC12LC508AT-04I/SM is an 8-bit PIC12C-series CMOS microcontroller featuring 768 bytes of One-Time Programmable (OTP) program memory, 25 bytes of RAM, and 6 I/O pins, housed in an 8-pin SOIJ package rated for industrial temperature operation. The device operates at a maximum clock speed of 4 MHz from a 3.0V–5.5V supply (the 'LC' family is the low-voltage/low-power variant), and ships in tape-and-reel packaging for high-volume assembly. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, RAM, non-volatile program memory, and peripheral set on one die. The PIC12C family from Microchip uses a RISC-based Harvard architecture with a 12-bit instruction word and 8-bit data path; these parts target simple control tasks where cost, pin count, and deterministic interrupt response are more important than raw compute throughput. The 'LC' sub-family specifically trades higher speed for low-voltage operation (down to 3.0V) and reduced current consumption versus the standard PIC12C508A. The hypernym hierarchy: 8-bit microcontroller -> microcontroller -> embedded processor -> integrated circuit -> semiconductor. Key features of the PIC12LC508AT-04I/SM include a programmable 8-bit timer/counter (TMR0) with an 8-bit prescaler, Watchdog Timer (WDT) with its own on-chip RC oscillator for reliable operation independent of the main clock, Power-On Reset (POR), Device Reset Timer (DRT), and selectable code protection to guard against unauthorized memory reads. The 6-bit general-purpose I/O is multiplexed with shared peripheral functions including GP2/T0CKI for the timer clock input. The device uses a serial in-circuit programming interface via GP1/GP0 pins, eliminating the need for a parallel programmer. From an architecture perspective, the PIC12C5xx core executes most instructions in a single oscillator cycle (200 ns at 4 MHz), enabling responsive event handling. The 12-bit instruction width optimizes code density for bit-oriented and byte-oriented operations commonly used in control firmware. Internal 4 MHz RC oscillator accuracy is typically within ±1% over the industrial temperature range, removing the need for external crystal in cost-sensitive applications. Typical applications for the PIC12LC508AT-04I/SM include low-power battery sensors, smart-card / token / disposable electronic devices, simple LED controllers, PWM fan controllers, and small appliance control boards. The 'I' suffix indicates industrial temperature range (-40°C to +85°C), making the part suitable for outdoor and automotive-cabin environments. The 'T' suffix denotes tape-and-reel packaging, and the 'SM' suffix specifies the SOIJ-8 surface-mount package (a J-lead variant of SOIC).\n When designing with this part, note that OTP memory cannot be electrically erased—prototyping should be performed with the windowed JW variant or the pin-compatible PIC12F508 (Flash). Decoupling VDD with a 100 nF ceramic cap placed within 5 mm of the pin is recommended. For applications needing ADC, EEPROM, or more RAM, consider the PIC12F675 or PIC12CE518 upgrade paths. This page synthesizes distributor stock data, parametric drop-in alternatives, and application guidance not collected in the manufacturer datasheet alone.

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PIC12LC508AT-04I/SN

PIC12LC508AT-04I/SN - 8-bit OTP MCU 768B 4MHz | Microchip

The Microchip Technology PIC12LC508AT-04I/SN is an 8-bit PIC CMOS RISC microcontroller housed in an 8-pin SOIC (SN) package, featuring 768 bytes of One-Time-Programmable (OTP) program memory, 25 bytes of RAM, and 6 programmable I/O pins. It operates at a maximum clock frequency of 4 MHz and supports a supply voltage range of 2.5 V to 5.5 V, making it suited to low-power 3.3 V and 5 V rails. The "LC" designation denotes the low-power CMOS process variant, and "04" indicates the 4 MHz speed grade, while the "I" suffix marks the industrial -40C to +85C temperature grade. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, RAM, and programmable peripherals into one package. Within the embedded semiconductor taxonomy, the PIC12LC508A sits in the 8-bit MCU category, a sub-class of microcontrollers, which themselves sit under embedded processors and the broader power-managed semiconductor family. The 12-bit instruction-width PIC core used here (separate from the 14-bit and 16-bit cores found in PIC16/PIC18 families) provides deterministic single-cycle execution for tight control loops, while keeping code density and die size small. Key features include an 8-bit real-time clock/counter (TMR0) with an 8-bit programmable prescaler, a Watchdog Timer (WDT) with its own dedicated on-chip RC oscillator for fail-safe operation, Power-On Reset (POR), Device Reset Timer (DRT), and user-programmable code protection that can lock the OTP contents after programming. The LC process supports a wide 2.5 V to 5.5 V supply window, allowing the device to operate directly from a 3.3 V regulator or two alkaline cells, and the small 8-pin SOIC footprint enables placement in highly space-constrained modules. Industrial temperature rating supports harsh-environment deployment. Typical applications include standalone appliance controllers, low-cost logic-replacement modules, sensor-signal conditioning front-ends, LED driving sequencers, and small-form-factor battery-powered devices. Because OTP memory is programmed once and cannot be electrically erased, the PIC12LC508AT-04I/SN is best fitted to high-volume, code-stable designs where field firmware updates are not required. For engineering prototypes or low-volume runs, a Flash-based PIC12F family alternative is typically preferred. When designing with this device, ensure that the MCLR (reset) pin and GP3 configuration are addressed correctly per datasheet Figure 1-1, and budget OTP programming time during manufacturing test. The internal 4 MHz RC oscillator is factory-trimmed to within +/-1% typical, eliminating an external crystal in many applications. This page synthesizes verified distributor pricing, drop-in same-package alternatives, application guidance, and design notes not consolidated on the manufacturer datasheet alone.

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PIC12LC509A-04/P

PIC12LC509A-04/P - 1.5KB OTP 8-Bit MCU, 4MHz | Microchip

The Microchip Technology PIC12LC509A-04/P is an 8-bit CMOS microcontroller based on the PIC RISC architecture, offering 1.5KB of one-time-programmable (OTP) EPROM program memory in an 8-pin PDIP through-hole package. It executes instructions in a single 200ns cycle (at 20MHz), operates from a wide 2.5V to 5.5V supply range, and is specified for the industrial -40C to +85C temperature range. The '-04' suffix denotes a 4MHz maximum oscillator frequency variant optimized for low-power operation. An 8-bit microcontroller is a single-chip computer that integrates a CPU, memory, and I/O peripherals on one die. The PIC12LC509A belongs to the PIC12 family of low-pin-count MCUs, sitting within the broader PIC microcontroller taxonomy (PIC10/12/16/18 -> 8-bit PIC -> RISC microcontroller -> embedded controller). Its RISC architecture with 33 single-word/single-cycle instructions enables deterministic execution, low power draw, and easy assembly-language programming, making PIC MCUs a popular choice for cost-sensitive embedded applications since the 1990s. Key features include a programmable 8-bit real-time clock/counter (TMR0) with 8-bit programmable prescaler, Power-On Reset (POR), Device Reset Timer (DRT), Watchdog Timer (WDT) with dedicated on-chip RC oscillator for reliable operation, and programmable code protection. The 1,000,000 erase/write cycle endurance rating (per datasheet) indicates high program-memory durability for OTP-based devices. The 8-pin PDIP package enables easy breadboarding and through-hole assembly, ideal for hobbyist, educational, and legacy industrial designs. The PIC12LC509A utilizes a Harvard-architecture RISC core with separate program and data buses, providing predictable instruction timing. Its CMOS process and static design minimize power consumption to the microamp range in sleep modes, while the integrated WDT and POR reduce external component count. The 6 general-purpose I/O pins (GP0-GP5) plus GP3/MCLR support digital interfacing for sensors, switches, LEDs, and simple serial protocols implemented in firmware. Typical applications include battery-powered sensor nodes, automotive body controllers, industrial timing and control circuits, appliance control boards, and consumer electronics such as remote controls and toys. The wide voltage range and low power make it especially suited for battery or energy-harvesting designs where supply regulation is impractical. When designing with this device, ensure the GP3/MCLR pin is correctly pulled high through a resistor (10k ohm typical) for proper reset behavior, and place a 0.1uF decoupling capacitor close to VDD. The OTP memory cannot be re-programmed in-circuit, so plan for code-stable production quantities. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found on the manufacturer datasheet alone, helping engineers evaluate the PIC12LC509A-04/P for both new designs and legacy maintenance.

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PIC12LC509A-04/SM

PIC12LC509A-04/SM - 8-bit OTP MCU, 1.5KB EPROM, 4MHz | Microchip

The Microchip PIC12LC509A-04/SM is an 8-bit, low-cost, high-performance CMOS OTP (One-Time-Programmable) microcontroller from the PIC12C5xx family, packaged in an 8-pin SOIJ (SM) and rated for 4 MHz operation from a 3.3V/5V supply. It integrates 1.5 KB of program memory (1K x 12 EPROM words), 41 bytes of data RAM, six general-purpose I/O pins, and an 8-bit real-time timer/counter (TMR0) with an 8-bit programmable prescaler in a single silicon die. What is an 8-bit OTP microcontroller? It is a small, fully-static CMOS processor that executes a fixed RISC instruction set from non-volatile one-time-programmable program memory. The PIC12LC509A belongs to the taxonomy: microcontroller -> embedded MCU -> 8-bit MCU -> PIC12 family -> PIC12C5xx OTP sub-family. Within a system hierarchy it sits below the application processor, handling glue logic, sensor I/O, and low-power control tasks where simplicity and pin count matter more than raw MIPS. Key features of the PIC12LC509A include 33 single-word single-cycle instructions, a Power-On Reset (POR), a Device Reset Timer (DRT), a Watchdog Timer (WDT) with its own on-chip RC oscillator, programmable code protection, and 1,000,000 erase/write cycle endurance on EPROM. It executes instructions in 1 microsecond at 4 MHz and offers four oscillator options for system-clock flexibility. Architecturally the PIC12LC509A uses a Harvard-style RISC core with separate program and data buses, which is why it can fetch an instruction and access data in a single cycle. The device draws very low operating current (typical I_dd in the low-mA range at full speed) and supports a wide operating voltage range from 2.5V up to 5.5V, enabling direct battery or 3.3V-rail operation in portable designs. Typical applications include low-cost consumer appliances, sensor signal conditioning, simple motor and lighting controllers, automotive body modules, and standalone glue-logic replacements for discrete 555/74HC-based designs. It is also well suited to industrial control loops that require deterministic timing but tolerate 4 MHz throughput. Designers choose the PIC12LC509A when they need a proven PIC architecture in an 8-pin footprint with EPROM-based code storage. When designing with this part, remember that OTP memory cannot be re-programmed in-circuit - the device must be programmed in a socket programmer before final assembly. Provide adequate decoupling (0.1 uF + bulk) close to Vdd, and configure the MCLR pin with a proper pull-up and, if desired, a manual reset switch. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes that go beyond what is printed on the Microchip datasheet, helping engineers select, second-source, and deploy the PIC12LC509A-04/SM with confidence.

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PIC12LC509A-04I/P

PIC12LC509A-04I/P - 8-bit 4MHz OTP MCU, 1.5KB | Microchip

The Microchip Technology PIC12LC509A-04I/P is an 8-bit CMOS microcontroller from the PIC12C5xx family, delivering 1.5KB (1K x 12) of One-Time Programmable (OTP) program memory, 41 bytes of RAM, and 6 I/O pins in an 8-pin PDIP through-hole package. It operates at up to 4MHz clock speed with 200ns instruction execution, executes 33 single-word/single-cycle RISC instructions, and runs across the industrial -40C to +85C temperature range with an extended 2.5V-5.5V supply window thanks to its LC low-voltage process variant. 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.

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PIC12LC509A-04I/SM

PIC12LC509A-04I/SM - 8-bit 4MHz OTP MCU 1.5KB EPROM | Microchip

The Microchip PIC12LC509A-04I/SM is an 8-bit CMOS microcontroller based on the PIC12 baseline architecture, featuring 1.5KB (1K x 12) of One-Time Programmable (OTP) program memory, 41 bytes of RAM, and a 4MHz maximum operating frequency in an 8-pin SOIJ (SM) surface-mount package. The "LC" suffix denotes the extended low-voltage variant, supporting operation from 2.5V to 5.5V, while the "04" speed grade specifies the 4MHz oscillator range. The "I" industrial temperature grade covers -40C to +85C, making the part suitable for harsh-environment embedded designs. A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory, and peripherals. The PIC12LC509A belongs to the PIC12C5xx family of low-cost, high-performance 8-bit fully static, EPROM-based CMOS microcontrollers that employ a RISC architecture with only 33 single-word/single-cycle instructions. This category sits within the hierarchy: microcontroller -> embedded processor -> semiconductor IC. The device's wide operating voltage range, low power consumption, and compact 8-pin footprint make it ideal for cost-sensitive, space-constrained applications where simple logic replacement or dedicated control tasks are required. Key features include an 8-bit real-time clock/counter (TMR0) with an 8-bit programmable prescaler, Power-On Reset (POR), Device Reset Timer (DRT), and a Watchdog Timer (WDT) with its own dedicated on-chip RC oscillator for reliable operation. The MCU offers programmable code protection supporting up to 1,000,000 erase/write cycles for the EPROM cell, and 6 general-purpose I/O pins. The internal architecture executes instructions in a 200ns single-cycle period, providing deterministic throughput for real-time control loops. The PIC12LC509A utilizes a Harvard RISC architecture with separate program and data buses, 12-bit-wide instructions, and an 8-bit-wide data path. The EPROM-based program memory is one-time programmable, simplifying manufacturing for high-volume, low-cost products. The internal 4MHz RC oscillator option reduces external component count; alternatively, the device can be clocked by an external crystal or resonator. The integrated WDT with its own RC oscillator ensures the MCU can recover from software faults without external supervision. Typical applications include consumer appliance control, battery-powered sensor nodes, simple LED lighting controllers, automotive body electronics (non-safety-critical), industrial control replacement of discrete logic, and IoT edge devices requiring minimal code footprint. The 6 I/O pins are sufficient for direct drive of relays, LEDs, buttons, and simple serial protocols. When designing with this device, note that the EPROM cell cannot be re-programmed; use the PIC12F509 Flash-based equivalent for prototyping. The SOIJ (SM) package is a small-outline IC with J-leads; it shares the same land pattern as standard SOIC-8 but uses curved J-lead terminations that improve board-level reliability. Decoupling capacitors (100nF typical) should be placed within 3mm of VDD. This page synthesizes distributor pricing, drop-in alternatives within the PIC12 family, and practical design notes not consolidated in the manufacturer datasheet.

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PIC12LC509A-04I/SN

PIC12LC509A-04I/SN - 8-bit 4MHz OTP MCU, 1.5KB | Microchip

The Microchip Technology PIC12LC509A-04I/SN is an 8-bit CMOS microcontroller from the PIC12C family, featuring 1.5KB (1K x 12) of One-Time Programmable (OTP) program memory, 41 bytes of RAM, and a 4MHz internal oscillator, all housed in an 8-pin SOIC (SN) package. This industrial-grade (-40C to +85C) device operates from 2.5V to 5.5V and delivers 200ns instruction execution at 5V. 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.

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PIC12LC509AT-04/SM

PIC12LC509AT-04/SM - 8-bit 4MHz OTP MCU, 1.5KB, 8-SOIJ | Microchip

The Microchip Technology PIC12LC509AT-04/SM is an 8-bit PIC RISC microcontroller IC operating at 4 MHz with 1.5 KB (1K x 12) of one-time programmable (OTP) program memory and 41 bytes of RAM, housed in an 8-pin SOIJ surface-mount package. It is a member of the PIC12C/LC family designed for low-power, cost-sensitive embedded control. A microcontroller (MCU) is a single-chip computer containing a CPU core, non-volatile program memory, working RAM, and integrated peripherals such as timers, reset circuitry, and I/O ports. The PIC12LC509AT belongs to the broader taxonomy of 8-bit microcontrollers -> RISC microcontrollers -> embedded microcontrollers -> semiconductor IC. Its OTP program memory is programmed once and cannot be erased, making the part cost-optimized for high-volume fixed-function applications. Key features include six general-purpose digital I/O pins, an 8-bit real-time clock/counter (TMR0) with an 8-bit 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 device supports 1,000,000 erase/write cycles per the manufacturer datasheet and operates over a wide supply range suitable for both 3.3V and 5V rails. The architecture uses a Harvard-class RISC core with single-cycle instructions, allowing most instructions to execute in 200 ns at 4 MHz. Low-power CMOS design minimizes quiescent draw for battery or energy-harvesting applications. On-chip peripherals eliminate most external components, reducing BOM cost and PCB area. Typical applications include low-cost consumer appliances, IR remote controls, battery-powered sensor interfaces, LED lighting controllers, simple motor control, and replacement of discrete logic. The 'T' suffix denotes tape-and-reel packaging and the 'A' denotes the enhanced mid-range instruction set, while 'LC' indicates the low-voltage CMOS process variant with 3.3V/5V operation. When designing with this device, ensure MCLR is tied to VDD through a pull-up for normal operation or left as a reset input for programming. Decoupling capacitors (0.1 uF) must be placed close to VDD and VSS. OTP memory requires all firmware to be fully verified before production programming, since post-programming updates are impossible. This page synthesizes distributor pricing, drop-in alternatives, application guidance, and design notes not found in the standalone manufacturer datasheet, providing engineers with a one-stop reference for sourcing and qualifying PIC12LC509AT-04/SM.

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PIC12LC509AT-04I/SM

PIC12LC509AT-04I/SM - 8-bit 4MHz OTP MCU, 1.5KB | Microchip

The Microchip Technology PIC12LC509AT-04I/SM is an 8-bit PIC microcontroller running at 4 MHz with 1.5 KB (1K x 12) of OTP program memory and 41 bytes of RAM, housed in an 8-pin SOIJ (SM) package. It operates from 2.5 V to 5.5 V, provides 6 I/O pins, and is qualified to the -40C to +85C industrial temperature range. The 'LC' suffix denotes the low-power CMOS variant of the baseline PIC12C509A family. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory, volatile working memory, and configurable peripheral blocks into one package. The PIC10/12 family sits at the low end of Microchip's 8-bit PIC microcontroller portfolio, designed for cost-sensitive, pin-limited applications such as appliance controls, sensor signal conditioning, and battery-powered logic replacements. The PIC architecture uses a RISC instruction set with only 33 single-word instructions, allowing most instructions to execute in one instruction cycle (200 ns at 20 MHz / 1 us at 4 MHz). Key features include a programmable 8-bit prescaler plus TMR0 timer/counter, Power-On Reset (POR), Device Reset Timer (DRT), a Watchdog Timer (WDT) with its own on-chip RC oscillator, and user-programmable code protection. The OTP program memory allows one-time field programming while keeping unit cost lower than Flash-based equivalents. Brown-out and power-on reset blocks hold the device in a known state on cold starts, and the internal oscillator option reduces external component count. The PIC12LC509A architecture uses a Harvard-design CPU with separate program and data paths. The OTP program memory is 12 bits wide to match the instruction format, while the data RAM is organized as general-purpose file registers plus special-function registers mapped into bank 0. The 6 I/O pins are multiplexed with the GP0..GP5 ports and can be individually configured as digital inputs or outputs via the TRISGPIO register. Internal peripherals include the TMR0 timer with an 8-bit programmable prescaler that can be clocked from the system oscillator, the external GP2/T0CKI pin, or the internal WDT RC oscillator. Typical applications include low-cost logic replacement, smart sensors and battery-powered instrumentation, white goods and appliance user-interface controllers, simple RC-servo or stepper pulse generators, and personal-care or hobby devices. Designers choose this part when small package size, low power, and minimal external components outweigh the need for reprogrammability or analog peripherals. A key design consideration: the OTP memory cannot be erased and rewritten. Engineers should plan prototypes around the Flash-based PIC12F509 (same die family, Flash, same pinout) and migrate to this OTP part only once firmware is frozen. Decoupling on VDD should be a 100 nF ceramic placed within 5 mm of the pin, and unused inputs must be tied to a defined logic level (never floating) to avoid shoot-through current on the I/O drivers. This page synthesizes distributor pricing, drop-in alternatives, and design considerations for the PIC12LC509AT-04I/SM that are not aggregated on the manufacturer product page.

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PIC12LC671-04/SM

PIC12LC671-04/SM - 4MHz 8-Bit CMOS MCU with ADC | Microchip

The Microchip Technology PIC12LC671-04/SM is an 8-bit CMOS RISC microcontroller with an integrated 8-bit analog-to-digital converter (ADC), 1.75 KB (1K x 14) of One-Time-Programmable (OTP) program memory and 128 bytes of RAM, housed in an 8-pin SOIJ (SM) surface-mount package. The "LC" suffix denotes the low-voltage CMOS variant, which operates from a supply voltage as low as 2.5 V while still supporting clock speeds up to 4 MHz. With only 6 general-purpose I/O pins, the PIC12LC671 is designed for space-constrained analog and digital embedded designs that require on-chip ADC and very low power draw. A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory (program + data), and peripherals such as ADC, timers and I/O ports. Within Microchip's taxonomy, the PIC12C67x family belongs to the PIC10/12/16 mid-range 8-bit architecture, which sits beneath the PIC18 high-tier 8-bit family and the PIC24/dsPIC 16-bit families in Microchip's broader 8-bit -> 16-bit -> 32-bit microcontroller hierarchy. The mid-range core uses a 14-bit instruction word and Harvard architecture, delivering deterministic interrupt response and predictable timing for real-time control applications. Key features include four-channel 8-bit ADC, two analog comparators, a 16-bit timer/counter with programmable prescaler, an 8-bit timer/counter, internal watchdog timer with on-chip RC oscillator, and 4 MHz maximum operating frequency. The device supports in-circuit serial programming (ICSP) via GP0/GP1, allowing firmware to be programmed after PCB assembly. Power management features include selectable oscillator modes and a power-saving sleep mode with wake-up via I/O change or watchdog timer overflow. Typical applications include battery-powered sensor interfaces, automotive body electronics (where the "LC" extended voltage range is valuable), consumer appliance controllers, simple closed-loop fan control, and low-cost analog data acquisition. The combination of on-chip ADC and very low cost makes this part a common choice for replacement of discrete analog signal chains in cost-sensitive products. When designing with this device, engineers should note that OTP memory cannot be reprogrammed; for prototyping the JW (ceramic windowed) or -I (industrial temperature) variants are typically preferred. The SOIJ package offers a slightly smaller footprint than standard SOIC while remaining hand-solderable with appropriate tooling.

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PIC12LC671-04I/MF

PIC12LC671-04I/MF - 8-bit OTP MCU, 1.75KB, 4MHz, 8-DFN-S | Microchip

The Microchip Technology PIC12LC671-04I/MF is an 8-bit PIC microcontroller from the PIC12C family, integrating 1.75KB (1K x 14) of One-Time Programmable (OTP) program memory and 128 bytes of RAM, housed in an 8-lead DFN-S (6x5 mm) surface-mount package. It executes instructions at up to 4MHz, includes an internal RC oscillator, and exposes 5 or 6 general-purpose I/O pins with a built-in 4-channel 8-bit analog-to-digital converter. A microcontroller (MCU) is a single-chip computer that combines a CPU core, program memory, working RAM, and configurable peripherals into one device. The PIC12LC671 belongs to the microcontrollers -> 8-bit microcontrollers -> PIC microcontrollers -> OTP (one-time programmable) hierarchy within the broader embedded semiconductor category. Its 12C-series core uses a RISC-style instruction set with only 33 single-word instructions, allowing deterministic execution timing for real-time control tasks. Key specifications include 1.75KB OTP program memory, 128 bytes of data RAM, 6 I/O pins, four 8-bit ADC channels with internal reference, and ultra-low-power operation down to 2.5V supply. The 04 speed grade guarantees 4MHz operation across the industrial temperature range of -40C to +85C, while the suffix -I denotes the industrial grade. The DFN-S package enables compact PCB layouts while exposing a thermal pad for improved heat dissipation. The device uses Microchip's classic mid-range PIC architecture with a 14-bit instruction word and a Harvard memory structure, giving it a deterministic 1-cycle-per-instruction core. The integrated 4-channel 8-bit ADC allows direct interfacing with analog sensors without an external converter, and the internal oscillator eliminates the need for external crystals or resonators in cost-sensitive designs. Typical applications include battery-powered sensor nodes, low-cost consumer appliances, simple motor control, LED lighting controllers, and standalone analog signal conditioning. The integrated ADC and internal oscillator make the part a single-chip solution for many embedded designs that previously required a separate ADC IC or external clock source. When designing with this MCU, choose the proper speed grade for your oscillator configuration; the -04 version operates at up to 4MHz. Use low-power sleep modes for battery applications and place a 100nF decoupling capacitor close to VDD to ensure ADC accuracy. This page synthesizes distributor pricing, drop-in OTP and flash alternatives, and practical design notes not found in the manufacturer datasheet alone.

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PIC12LC671T-04/SM

PIC12LC671T-04/SM - 8-Bit 4MHz CMOS MCU 1.75KB OTP | Microchip

The Microchip Technology PIC12LC671T-04/SM is an 8-bit PIC microcontroller featuring 4 MHz operation, 1.75 KB (1K x 14) of OTP program memory and 128 x 8 bytes of RAM, supplied in a surface-mount 8-pin SOIJ package on Tape & Reel. It operates from a 2.5 V to 5.5 V supply, integrates a 4-channel 8-bit A/D converter, and exposes 6 digital I/O lines, making it suited to compact embedded designs with mixed analog/digital requirements. A microcontroller (MCU) is a single-chip computer that integrates a CPU, non-volatile program memory, RAM, and peripheral interfaces such as ADCs, timers, and communication controllers. The PIC12LC family belongs to Microchip's 8-bit PIC RISC architecture, which sits in the broader taxonomy of microcontroller -> embedded processor -> semiconductor device. The LC variant specifically targets low-voltage (2.5 V min) operation, enabling battery-powered and energy-harvesting designs that the original PIC12C parts (4.0 V min) cannot directly address. Key features include the 8-bit PIC RISC core with 33 single-word instructions, an 8-bit real-time counter (TMR0) with programmable prescaler, a Watchdog Timer (WDT) with its own dedicated on-chip RC oscillator, Power-On Reset (POR), Device Reset Timer (DRT), and In-Circuit Serial Programming (ICSP) support. The integrated 4-channel 8-bit ADC eliminates the need for external converter ICs, reducing BOM cost and PCB area in sensor-interface and signal-conditioning products. Architecturally, the PIC12LC671 uses a Harvard-class RISC core with separate program and data buses, a 14-bit instruction word (vs the 12-bit baseline of PIC10/PIC12F), and CMOS process technology for low quiescent current. The SOIJ-8 surface-mount package supports high-density board designs, while the OTP program memory allows cost-optimized production runs without the mask-NRE of ROM parts. Typical applications include small consumer appliances, sensor signal conditioning with on-chip ADC, low-power battery devices, simple closed-loop controllers, and microcontroller-based replacement of discrete logic. The combination of low-voltage operation, integrated ADC, and small footprint makes it suitable for hand-held instruments and remote sensor nodes. When designing with this part, ensure decoupling capacitors (100 nF plus bulk) are placed within 5 mm of the VDD pin, and note that OTP memory requires single-shot programming - production firmware must be stable before wafer programming. The /SM SOIJ package has JEDEC-compliant land pattern and MSL1 moisture sensitivity. This page synthesizes distributor pricing, same-package pin-to-pin compatible alternatives, and practical design notes drawn from the Microchip PIC12LC671 datasheet family - a single reference not available on individual distributor pages.

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PIC12LC671T-04I/MF

PIC12LC671T-04I/MF - 4MHz 8-Bit MCU 1.75KB OTP | Microchip

The Microchip Technology PIC12LC671T-04I/MF is an 8-bit CMOS RISC microcontroller from the PIC12C67X family, featuring 1.75KB (1K x 14) of One-Time Programmable (OTP) program memory, 64 bytes of data RAM, an integrated 8-bit A/D converter, and 6 I/O pins. The device operates from a low-voltage range of 2.5V to 5.5V and executes instructions at up to 4MHz, making it suitable for cost-sensitive embedded applications. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, memory, and peripherals on one die. The PIC12LC67X family belongs to the PIC microcontroller hierarchy: MCU -> 8-bit MCU -> RISC MCU -> PIC architecture -> PIC12 family -> PIC12LC67X sub-family. These MCUs use a Harvard architecture with separate program and data buses, allowing single-cycle instruction execution with deterministic timing - critical for real-time control loops. The device offers 64 bytes of RAM, a hardware USART/SCI interface (asynchronous and synchronous serial), and four analog input channels multiplexed to an 8-bit successive-approximation ADC. The internal 4MHz RC oscillator and on-chip reset circuitry eliminate most external components. The 'L' suffix denotes the low-voltage (2.5V) variant versus the standard PIC12C671 (3.0V minimum), while 'T' indicates tape-and-reel packaging and 'MF' designates the 8-pin DFN-S (6x5 mm) package with exposed pad. Typical applications include battery-powered sensor nodes, automotive interior lighting, small appliance control, smart metering, and remote-control transmitters. The 4MHz operation, low cost, and compact DFN footprint make it attractive for high-volume consumer products where board space and BOM cost dominate. When designing with this part, note that OTP memory cannot be reprogrammed - firmware must be verified before production programming. The industrial -40C to +85C temperature grade allows deployment in harsh environments, but engineers should derate clock speed above 70C if ADC accuracy matters. This page synthesizes distributor stock, datasheet parameters, drop-in same-family alternatives, and practical design notes not consolidated on the manufacturer product page.

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PIC12LC671T-04I/SM

PIC12LC671T-04I/SM - 8-Bit PIC MCU, 1.75KB OTP, 4MHz | Microchip

The Microchip Technology PIC12LC671T-04I/SM is an 8-bit CMOS microcontroller in the PIC12C family with integrated 8-bit A/D converter, 1.75 KB (1K x 14) of One-Time-Programmable (OTP) program memory, 128 bytes of RAM, and 6 I/O pins, housed in an 8-pin SOIJ (T/R) surface-mount package. Operating up to 4 MHz clock speed from a 2.5 V to 5.5 V supply, this device delivers fully-static CMOS performance with low power consumption suitable for battery-powered and embedded control applications. An 8-bit PIC microcontroller is a compact RISC-based processing unit that integrates CPU core, program memory, RAM, peripherals, and I/O into a single IC. PIC microcontrollers sit within the broader taxonomy of microcontrollers -> microprocessors -> semiconductor ICs, and the PIC12 family specifically targets space-constrained cost-sensitive designs requiring minimal external component count. The LC variant denotes a low-voltage/low-power version, while the T suffix indicates Tape and Reel packaging for high-volume assembly. Key features include four-channel 8-bit A/D conversion, 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, and internal oscillator support. The wide 2.5 V to 5.5 V supply range accommodates both 3.3 V and 5 V system designs, while 6 I/O pins provide ample connectivity for sensor interfaces, switch inputs, and LED drive outputs in compact form factors. The PIC12C67X architecture uses a 14-bit instruction word with a two-stage pipeline, delivering efficient code density for C and assembly programming. The integrated 8-bit ADC with multiple channels eliminates the need for external conversion ICs, reducing BOM cost and PCB area. Brown-out detection, wide operating temperature range, and CMOS low-power standby make the device suitable for industrial and consumer applications. Typical applications include low-cost battery-powered sensor nodes, appliance control boards, automotive interior lighting modules, HVAC damper actuators, security system sensors, and small motor control subsystems. The combination of integrated ADC, watchdog timer, and internal oscillator reduces external part count significantly. When designing with this part, ensure the watchdog timer is properly serviced in firmware to prevent unintended resets, and verify that the chosen clock source (internal RC or external crystal) matches timing requirements for serial communications. Programming requires Microchip-compatible device programmers supporting OTP PIC12C67X devices. This page synthesizes drop-in alternative listings, parametric comparison, and practical design notes not found in the standalone manufacturer datasheet, enabling engineers to evaluate the PIC12LC671T-04I/SM for replacement, second-source, and new-design scenarios.

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PIC12LC672-04/P

PIC12LC672-04/P - 8-Bit 4MHz OTP MCU 3.5KB | Microchip

The Microchip Technology PIC12LC672-04/P is an 8-bit CMOS microcontroller from the PIC12C67x series, featuring 3.5KB (2K x 14) of One-Time-Programmable (OTP) program memory and 128 bytes of RAM in an 8-pin PDIP through-hole package. The device operates at a maximum clock speed of 4 MHz and is powered by a 2.5 V to 5.5 V supply, supporting 6 I/O pins with integrated A/D converter functionality. An 8-bit microcontroller (MCU) is a small computer-on-a-chip containing a CPU, program memory, data RAM, and peripherals on a single silicon die. The PIC12LC672 belongs to the PIC (Peripheral Interface Controller) family of RISC microcontrollers, characterized by a Harvard architecture with separate program and data buses. Within the broader semiconductor taxonomy, this part sits in the hierarchy: microcontroller -> 8-bit MCU -> embedded controller -> integrated circuit -> semiconductor. PIC microcontrollers are widely used in simple control applications where deterministic execution, low pin count, and minimal external components are required. Key features include an 8-bit real-time clock/counter (TMR0) with an 8-bit programmable prescaler, Power-On Reset (POR), Device Reset Timer (DRT), and a Watchdog Timer (WDT) with its own dedicated on-chip RC oscillator for reliable recovery from code lockups. The 6 GPIO pins are shared with on-chip analog and digital peripherals, and the LC suffix indicates a low-power CMOS variant optimized for battery-operated applications with extended operating voltage range down to 2.5 V. Typical applications include battery-powered sensor interfaces, simple appliance controls, low-cost consumer electronics, and replacement of discrete logic in compact designs. The 8-pin PDIP package makes the PIC12LC672-04/P well suited for through-hole prototyping, hobby projects, and legacy designs where a socketed or easily-replaceable MCU is desirable. When designing with this part, note that the OTP program memory can be written only once, so production firmware must be fully validated before programming. For applications requiring field firmware updates, consider a Flash-based alternative such as the PIC12F675. The /P suffix designates the 8-pin PDIP package rated for the commercial temperature range (0C to +70C). This page synthesizes distributor pricing, drop-in compatible alternatives, and practical design notes compiled from the Microchip datasheet family and current distributor listings - context not aggregated in any single manufacturer document.

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PIC12LC672-04/SM

PIC12LC672-04/SM - 8-Bit 4MHz OTP MCU, 3.5KB | Microchip

The Microchip Technology PIC12LC672-04/SM is an 8-bit CMOS microcontroller from the PIC12C family, featuring 3.5KB (2K x 14) of One-Time-Programmable (OTP) program memory, 128 bytes of RAM, and a 4 MHz instruction clock, all housed in an 8-pin SOIJ surface-mount package. It integrates a 4-channel 8-bit A/D converter, six general-purpose I/O lines, and a 8-bit real-time counter (TMR0) with programmable prescaler, providing a compact compute platform for space-constrained designs. A microcontroller (MCU) is a single-chip computer containing a CPU, program memory, RAM, and peripherals. The PIC12C/12CE/12F family from Microchip Technology uses a Reduced Instruction Set Computer (RISC) Harvard architecture, which separates program and data memory paths to enable single-cycle instruction execution and deterministic interrupt response. The PIC12LC672 sits in the hierarchy: 8-bit MCU -> RISC microcontroller -> embedded controller -> semiconductor IC. Key features include an operating voltage range of 2.5V to 5.5V, 33 single-word instructions, a Power-On Reset (POR) circuit, a Device Reset Timer (DRT), and a Watchdog Timer (WDT) with its own on-chip RC oscillator for reliable recovery from firmware faults. The internal 4 MHz oscillator eliminates the need for external clock components, reducing BOM cost and PCB area. The 8-bit A/D converter provides four analog input channels with selectable reference voltages, enabling direct sensor interfacing without external ADC ICs. The PIC12LC672 uses Microchip's mature OTP program memory architecture, which allows prototyping and low-volume production using inexpensive programming tools, while the LC variant indicates operation down to 2.5V for battery-powered applications. The integrated peripherals allow designers to replace multiple discrete components with a single MCU, simplifying BOM and improving reliability through reduced part count. Typical applications include battery-powered sensor nodes, simple motor drivers, LED controllers, and embedded control subsystems in consumer and industrial products. The combination of low power, integrated ADC, and small 8-pin package makes it well-suited to cost-sensitive designs where board space is at a premium. When designing with this part, use Microchip's MPLAB development environment for code generation and debugging. Ensure decoupling capacitors are placed close to VDD and that the MCLR pin is properly biased. The OTP memory is one-time programmable; once programmed, the code cannot be erased or rewritten. This page synthesizes distributor pricing, drop-in alternatives from the PIC12C/12CE family, and practical design notes not found in the manufacturer datasheet alone, giving engineers a single reference for sourcing and substitution decisions.

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PIC12LC672-04I/P

PIC12LC672-04I/P - 8-Bit OTP MCU 3.5KB 4MHz | Microchip

The Microchip Technology PIC12LC672-04I/P is an 8-bit CMOS RISC microcontroller with 3.5KB OTP program memory and 128 bytes of RAM, housed in an 8-pin PDIP (DIP-8) through-hole package with 6 I/O lines. It operates from 2.5V to 5.5V supply, supports a 4 MHz clock, and integrates a 10-bit resolution A/D converter and an 8-bit real-time counter with programmable prescaler. An MCU (Microcontroller Unit) is a single-chip computer that integrates a CPU core, program memory, RAM, and programmable peripherals on one die. Microcontrollers belong to the broader category of embedded processors, sitting beneath microprocessors in complexity but offering a complete compute-and-control solution in a single package. The PIC12LC672 specifically belongs to Microchip's PIC12C67X family of low-pin-count CMOS MCUs with on-chip ADC, hierarchically nested within: microcontroller -> embedded processor -> semiconductor IC. The 12-bit instruction word and RISC Harvard architecture deliver deterministic instruction timing ideal for low-cost analog-sensing and control applications. Key features include power-on reset (POR), device reset timer (DRT), watchdog timer (WDT) with its own dedicated on-chip RC oscillator, and an industrial operating temperature range of -40C to +85C. The integrated 10-bit ADC enables direct connection to analog sensors without an external converter, while the 8-bit TMR0 with programmable prescaler supports precise event timing. The device supports serial programming via Microchip's ICSP protocol, simplifying field upgrades and prototyping. Typical applications include analog-sensing embedded nodes, low-cost battery chargers, sensor signal conditioning, household appliance controls, and small-form-factor industrial instrumentation. The 6 I/O pins and 4 MHz instruction rate deliver adequate throughput for slow-loop control and intermittent-sampling applications rather than high-bandwidth signal processing. When designing with this part, ensure the brown-out and power-on reset timing are accounted for in the application logic, and choose the appropriate oscillator configuration (internal 4 MHz RC or external crystal) for your timing budget. The 128-byte RAM limit also requires disciplined variable usage in firmware.

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PIC12LC672T-04/SM

PIC12LC672T-04/SM - 8-Bit CMOS MCU 4MHz 3.5KB OTP 8-SOIJ | Microchip

The Microchip Technology PIC12LC672T-04/SM is an 8-bit, low-cost, high-performance CMOS fully-static PIC microcontroller with an integrated analog-to-digital converter, packaged in an 8-SOIJ surface-mount form factor. The device operates from 2.5V to 5.5V supply, runs at 4 MHz internal clock, integrates 3.5 KB (2K x 14) of One-Time-Programmable (OTP) program memory, and provides 6 I/O ports in an 8-pin SOIJ outline. The /SM suffix denotes the SOIJ-8 surface-mount package supplied on tape-and-reel for high-volume assembly lines. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, data memory, and programmable peripherals. In the broader system hierarchy, the PIC12LC672 belongs to the 8-bit PIC microcontroller family, itself a subcategory of microcontrollers under embedded processors. The 'LC' prefix indicates the low-voltage CMOS variant, optimized for battery-friendly 3.3V systems while remaining 5V tolerant - useful when a design must bridge legacy 5V peripherals and modern 3.3V logic. Key features include 3.5 KB OTP program memory, 128 bytes RAM, four analog input channels with 8-bit ADC, an 8-bit real-time counter (TMR0) with programmable prescaler, a Watchdog Timer (WDT) with dedicated on-chip RC oscillator, Power-On Reset (POR), Device Reset Timer (DRT), and an internal 4 MHz oscillator. The integrated 8-bit ADC eliminates the need for an external converter in simple sensor interfaces such as thermistor or potentiometer reading. Architecturally, the PIC12LC672 uses Microchip's classic RISC Harvard architecture with a 12-bit instruction word and a two-stage pipeline, delivering 1 MIPS at 4 MHz. CMOS static design means clock can be stopped without losing register state - ideal for ultra-low-power sleep modes. The device's six general-purpose I/O pins multiplex with the ADC inputs, oscillator pins, and reset, allowing designers to remap peripheral functions as application needs dictate. Typical applications include consumer remote controls, battery-powered sensor nodes, appliance front-panel controllers, simple motor control signal conditioning, low-end security keypads, and embedded timers in industrial 24V systems stepped down to 3.3V or 5V rails. The combination of ADC + small OTP memory makes it well suited for cost-sensitive analog-front-end products. When designing with this part, remember that OTP memory cannot be re-programmed - production firmware must be finalized before mask programming, or the part should be replaced by an EPROM/Flash equivalent (e.g., PIC12F675 or PIC12F683) for prototyping. Decoupling capacitors (100 nF) should be placed within 5 mm of VDD, and unused I/O pins should be configured as outputs to minimize quiescent current. This page synthesizes distributor pricing, drop-in PIC12 family alternatives, and practical design notes not found in the manufacturer datasheet alone.

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PIC12LC508A-04I/SM - 4MHz 8-bit OTP MCU 768B | Microchip

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PIC12LC508AT-04I/SM - 4MHz 8-Bit OTP MCU, 768B | Microchip

PIC12LC508AT-04I/SN - 8-bit OTP MCU 768B 4MHz | Microchip

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PIC12LC509AT-04I/SM - 8-bit 4MHz OTP MCU, 1.5KB | Microchip

PIC12LC671-04/SM - 4MHz 8-Bit CMOS MCU with ADC | Microchip

PIC12LC671-04I/MF - 8-bit OTP MCU, 1.75KB, 4MHz, 8-DFN-S | Microchip

PIC12LC671T-04/SM - 8-Bit 4MHz CMOS MCU 1.75KB OTP | Microchip

PIC12LC671T-04I/MF - 4MHz 8-Bit MCU 1.75KB OTP | Microchip

PIC12LC671T-04I/SM - 8-Bit PIC MCU, 1.75KB OTP, 4MHz | Microchip

PIC12LC672-04/P - 8-Bit 4MHz OTP MCU 3.5KB | Microchip

PIC12LC672-04/SM - 8-Bit 4MHz OTP MCU, 3.5KB | Microchip

PIC12LC672-04I/P - 8-Bit OTP MCU 3.5KB 4MHz | Microchip

PIC12LC672T-04/SM - 8-Bit CMOS MCU 4MHz 3.5KB OTP 8-SOIJ | Microchip