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PIC16LC56AT-04/SO - 8-Bit 4MHz OTP MCU, 1.5KB | Microchip
PIC16LC56AT-04/SO

PIC16LC56AT-04/SO - 8-Bit 4MHz OTP MCU, 1.5KB | Microchip

The Microchip Technology PIC16LC56AT-04/SO is an 8-bit RISC microcontroller from the PIC16C5X family, featuring 1.5KB (1K x 12) of One-Time Programmable (OTP) program memory, 25 x 8 bytes of RAM, and 12 I/O pins, housed in an 18-pin SOIC (SOP) surface-mount package. It executes instructions at a 4 MHz clock rate and uses a 12-bit wide instruction word with 33 single-word/single-cycle instructions for a 2:1 code compression ratio over competing 8-bit MCUs. An 8-bit microcontroller (MCU) is a single-chip computer with an 8-bit data bus, ALU, program counter, on-chip memory, and I/O peripherals. The PIC16C5X family belongs to the microcontrollers -> embedded processors -> integrated circuits hierarchy, sitting alongside 8051, AVR, and other legacy 8-bit families. Fully static CMOS design means the clock can be stopped without losing register state, and the LC suffix indicates a low-power CMOS variant aimed at battery-friendly designs versus the standard PIC16C5X EPROM parts. Key features of this device include 1.5KB OTP program memory, 25 bytes of general-purpose RAM, 12 bidirectional I/O pins organized in two ports (RA, RB), a watchdog timer with its own on-chip RC oscillator, power-on reset, and a 4 MHz maximum operating frequency. The 12-bit instruction word and 33-instruction RISC set allow most operations to complete in a single instruction cycle, giving the part an effective throughput of 4 MIPS at the 4 MHz clock rate. The architecture is Harvard-style, separating program and data memory buses. The PIC16LC56A uses a fully static CMOS process with an on-chip oscillator and supports external oscillator modes. It includes a programmable code-protection bit, an 8-bit real-time clock/counter (RTCC) with programmable prescaler, and a 5-deep hardware stack. Because the 'T' suffix denotes tape-and-reel packaging and the '04' speed grade limits operation to 4 MHz, designers should confirm that timing requirements for serial bit-banging or timer-driven loops stay within the 4 MHz instruction budget. Typical applications include low-cost consumer appliances, simple remote-control transmitters, basic sensor signal conditioning, LED lighting controllers, battery chargers, and replacement of discrete logic in glue-logic designs. The 12 I/O pins and small 18-pin SOIC footprint make it well-suited to compact, hand-held, or cost-sensitive products where processing needs are modest but predictable timing and low current draw matter. When designing with this device, note that OTP memory can be programmed only once, so it is best suited to production-volume products or prototyping where code will be finalized before mask ROM is impractical. Provide a clean 5V (or 2.5V-6.25V per LC range) supply with a 0.1 uF decoupling capacitor close to VDD, and keep the MCLR pin either tied high through a 10 kohm resistor or driven by the reset source to prevent unintended resets. This page synthesizes distributor pricing snapshots, same-package drop-in alternatives from the PIC16LC5X family, and practical design considerations beyond the manufacturer datasheet, giving engineers a single reference for sourcing and substitution decisions.

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PIC16LC56AT-04I/SO - 4MHz 8-bit OTP MCU, 1.5KB, 18-SOIC | Microchip
PIC16LC56AT-04I/SO

PIC16LC56AT-04I/SO - 4MHz 8-bit OTP MCU, 1.5KB, 18-SOIC | Microchip

The Microchip Technology PIC16LC56AT-04I/SO is a member of the PIC16C5X family of low-cost, high-performance, 8-bit fully-static, EPROM/ROM-based CMOS microcontrollers. It operates at a 4 MHz instruction rate from a 2.5 V to 5.5 V supply, integrates 1.5 KB (1K x 12) of One-Time Programmable (OTP) program memory and 25 bytes of general-purpose RAM, and provides 12 general-purpose I/O pins in a compact 18-pin SOIC (SO) package. A microcontroller (MCU) is a single-chip computer containing a CPU core, non-volatile program memory, working RAM, and peripheral I/O. The PIC16C5X architecture pioneered Harvard memory organization with separate program and data buses, 12-bit-wide instructions, and a two-stage pipeline that executes most instructions in one cycle. The 'LC' prefix indicates the low-voltage CMOS variant, allowing operation down to 2.5 V for battery-powered designs, while the 'A' suffix denotes an enhanced baseline device with a 4 MHz oscillator and improved interrupt structure versus the original PIC16C56. The OTP variant is programmed once at production, making it suited to fixed-function appliances and cost-sensitive embedded controllers. Key features include 12 CMOS bidirectional I/O ports capable of directly driving LEDs, an 8-bit timer/counter (TMR0) with a programmable prescaler, a watchdog timer for reliable unattended operation, power-on reset, brown-out detection, and a 4 MHz internal/external oscillator option. The device draws microamp-level sleep current, supports in-circuit serial programming, and operates over the industrial -40 °C to +85 °C temperature range. Typical applications include low-cost consumer appliances, remote-control transmitters, LED lighting controllers, battery chargers, smart sensors, and simple IoT edge nodes. Its wide voltage tolerance also makes it useful in 3 V coin-cell systems as well as legacy 5 V industrial logic. Compared with PIC16F parts, the OTP-based PIC16LC56AT provides the lowest unit cost for high-volume production where code does not need to be updated.

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PIC16LC56AT-04I/SS - 8-bit 4MHz OTP MCU 1.5KB | Microchip
PIC16LC56AT-04I/SS

PIC16LC56AT-04I/SS - 8-bit 4MHz OTP MCU 1.5KB | Microchip

The Microchip Technology PIC16LC56AT-04I/SS is an 8-bit CMOS microcontroller from the PIC16C5X family, featuring 1.5KB (1K x 12) of One-Time Programmable (OTP) program memory, 25 bytes of RAM, and a 4MHz maximum operating frequency in a 20-pin SSOP (5.30mm body width) surface-mount package. It belongs to the LC (low-power CMOS) subfamily of the original PIC16C5X baseline architecture, delivering fully static operation with 12 general-purpose I/O pins, an integrated Power-On Reset (POR), and a Watchdog Timer (WDT) for reliable embedded control. What is a PIC microcontroller? A Microcontroller Unit (MCU) is a single-chip computer containing a CPU core, program memory (ROM/Flash/OTP), data RAM, and integrated peripherals such as timers, communication interfaces, and I/O ports. The PIC16C5X baseline family, introduced by Microchip in the late 1980s, uses a 12-bit-wide instruction word and a Harvard architecture with separate program and data buses. The LC variants (PIC16LC5X) operate from 2.5V to 6.0V with CMOS low-power consumption, sitting hierarchically under the broader PIC microcontroller family and the wider 8-bit MCU class of discrete-semiconductor-adjacent integrated circuits. Baseline PICs remain popular for cost-sensitive, deterministic, low-power embedded designs. Key differentiating features of the PIC16LC56AT-04I/SS include its 4MHz instruction execution rate, 1.5KB OTP for fixed-code production, low-voltage LC operation, and the 20-SSOP footprint that enables compact PCB placement. The 04 speed grade designates a 4MHz oscillator input, and the /SS package suffix indicates the plastic shrink-small-outline 20-pin form factor with 0.65mm pitch. The T suffix in the part number denotes tape-and-reel packaging as supplied to OEMs. Technically, the device implements a RISC-like instruction set with only 33 single-word/cycle instructions at 4:1 code compression versus competing 8-bit MCUs of its era. It supports external oscillator clocking and provides configurable I/O with weak pull-up options, an 8-bit real-time timer/counter (TMR0), and a power-saving SLEEP mode. The OTP memory is one-time programmable, suitable for low-to-medium volume production where firmware stability is finalized. Typical applications include appliance control, sensor signal conditioning front-ends, LED driver controllers, low-cost remote controls, security keypads, and industrial timer/sequencer modules. Its 4MHz throughput and 12 I/O pins suit designs where deterministic interrupt response and minimal BOM cost are higher priorities than computational horsepower. When designing with this device, note that OTP memory cannot be reprogrammed, so the engineering samples should use the windowed JW variant for prototype firmware iteration. Decoupling requires a 0.1 microfarad ceramic capacitor placed within 5mm of VDD, and unused I/O should be configured as outputs low to minimize current draw in SLEEP mode. This page synthesizes current distributor pricing, verified drop-in alternatives from the PIC16C5X family, and practical design notes not consolidated in the original Microchip datasheet.

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PIC16LC57C-04/P - 4MHz 8-bit CMOS MCU, 3KB EPROM, 20 I/O | Microchip
PIC16LC57C-04/P

PIC16LC57C-04/P - 4MHz 8-bit CMOS MCU, 3KB EPROM, 20 I/O | Microchip

The Microchip PIC16LC57C-04/P is a low-cost, high-performance 8-bit fully-static EPROM-based CMOS microcontroller running at 4 MHz, housed in a 28-pin windowed CERDIP (P) package. It integrates 3KB (2K x 12) of one-time-programmable program memory and 72 bytes of RAM, with 20 digital I/O lines organized across multiple ports for flexible peripheral interfacing. The 'LC' suffix denotes the low-power CMOS process variant, with an operating voltage range of approximately 3V to 6.25V optimized for battery-sensitive designs. A microcontroller (MCU) is a single-chip computer that contains a CPU core, program memory, working RAM, and I/O peripherals. The PIC16C5X family that PIC16LC57C belongs to uses a RISC architecture with only 33 single-word/single-cycle instructions, achieving 2:1 code compression over comparable 8-bit CISC microcontrollers. This part sits in the hierarchy: microcontroller -> 8-bit MCU -> PIC16 family -> baseline-class PIC16C5X, representing the entry tier of the PIC microcontroller ecosystem before the enhanced PIC16F and PIC18 generations. Key features include 4 MHz maximum clock frequency, 12-bit-wide instruction word, 8-level hardware stack, 8-bit timer/counter with 8-bit prescaler, power-on reset, watchdog timer with dedicated on-chip RC oscillator, and programmable code protection. The windowed CERDIP package enables UV erasure for engineering development and prototype iteration. Power-saving SLEEP mode reduces quiescent current to microampere levels, ideal for battery-powered and energy-harvesting applications. The device uses a Harvard architecture with separate program and data buses, two 8-bit bidirectional I/O ports (RA/RB), and additional I/O pins. Its RISC design means most instructions execute in a single instruction cycle (4 clock periods), yielding sustained throughput of approximately 1 MIPS at 4 MHz. The on-chip watchdog timer with its own RC oscillator prevents code lockup in unattended or remote installations. Typical applications include appliance controls, security and access systems, automotive body electronics (non-safety), industrial process controllers, smart sensor nodes, and battery-powered instrument controllers. The 20 I/O pins comfortably drive keypads, LED displays, and low-speed serial communication links. When designing with this part, account for the windowed CERDIP footprint - it is intended for prototype use; production designs should migrate to the OTP or code-protected variants in plastic packages. Always place a 0.1uF decoupling capacitor adjacent to VDD with a short ground return. This page synthesizes distributor pricing, drop-in PIC16 family alternatives, and practical design considerations not consolidated on any single manufacturer datasheet or distributor listing.

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PIC16LC57C-04/SO - 8-Bit 4MHz OTP MCU 3KB | 28-SOIC
PIC16LC57C-04/SO

PIC16LC57C-04/SO - 8-Bit 4MHz OTP MCU 3KB | 28-SOIC

The Microchip Technology PIC16LC57C-04/SO is an 8-bit RISC microcontroller (MCU) from the PIC16C5X family, operating at up to 4 MHz with 3KB (2K x 12) of One-Time Programmable (OTP) program memory, packaged in a 28-pin SOIC (SO) form factor. It integrates 72 bytes of RAM and 20 digital I/O pins, and is specified for operation across a 2.5V to 6.0V supply range (with the LC low-voltage variant supporting battery-powered designs). A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory, working RAM, and peripheral I/O on one die, enabling compact embedded designs. The PIC16C5X family is part of the broader 8-bit microcontroller taxonomy: microcontroller -> embedded controller -> CMOS microcomputer -> semiconductor IC. Within Microchip's portfolio it sits at the entry-level / cost-optimized branch beneath the PIC16F and PIC18 families, favored for high-volume cost-sensitive applications. Key features of the PIC16LC57C-04/SO include a 12-bit instruction word with 33 single-cycle instructions, an 8-bit data path, a hardware watchdog timer, a power-on reset (POR) circuit, and an internal RC oscillator option that lets the device operate without an external crystal. The OTP program memory allows one-time programming in production, lowering unit cost compared to flash parts for mature, fixed-code designs. The wide 2.5V-6.0V VDD range suits both 3.3V and 5V systems. Architecturally, the PIC16LC57C uses a Harvard-style RISC core with separate program and data buses, two 8-bit I/O ports (RA, RB) and two additional I/O lines on PORTC, plus a 5-channel 8-bit ADC on selected siblings. The "C" suffix denotes the CMOS-process revision that delivers low quiescent current versus the older NMOS "B" die, and the "LC" prefix indicates the low-voltage (2.5V min) variant suitable for battery operation. The "-04" speed grade indicates a 4 MHz maximum oscillator frequency. Typical applications include appliance controls, remote keyless entry, smart sensors, low-end user-interface boards, battery-powered instruments, and simple motor-control front ends. Industrial designers often select this part for its wide supply range, robust I/O count (20 pins), and low unit cost. When designing with the PIC16LC57C-04/SO, ensure that your code fits within the 2K x 12 program memory and that the 20 I/O pins cover your signal requirements; the OTP memory means firmware changes require device replacement, so design final-code images only. This page synthesizes distributor pricing from DigiKey, LCSC, and Heisener, pin-compatible drop-in alternatives, and engineering design notes not found on any single distributor listing.

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PIC16LC57C-04/SP - 8-Bit 4MHz OTP MCU, 3KB | Microchip
PIC16LC57C-04/SP

PIC16LC57C-04/SP - 8-Bit 4MHz OTP MCU, 3KB | Microchip

The Microchip Technology PIC16LC57C-04/SP is an 8-bit CMOS OTP-based PIC microcontroller running at 4 MHz, packaged in a 28-pin SPDIP (0.300 inch wide, through-hole) with 3 KB (2K x 12) of program memory, 72 bytes of RAM, and 20 digital I/O lines. It belongs to the PIC16C5X family, features a RISC architecture with 33 single-word instructions, a two-level hardware stack, and an 8-bit real-time clock/counter (TMR0). According to the Microchip PIC16C5X family datasheet, the PIC16LC57C-04/SP is the low-voltage (LC) variant optimized for 3.0V to 6.25V operation. What is an 8-bit OTP microcontroller? An 8-bit OTP (One-Time Programmable) microcontroller is a single-chip computer built around an 8-bit data path with non-volatile program memory that can be written exactly once after manufacture. OTPs sit in the broader taxonomy: microcontroller -> embedded controller -> semiconductor -> integrated circuit. They are widely used in cost-sensitive, high-volume applications where the firmware is finalized before production and field reprogramming is not required. The PIC16LC57C-04/SP specifically belongs to the PIC16C5X baseline family, which uses 12-bit-wide instructions and is the entry tier in Microchip's PIC portfolio. Key features include a 100 ns instruction cycle at 4 MHz oscillator input, direct/indirect/relative addressing for data and instructions, seven or eight special function hardware registers, and a watchdog timer. The low-voltage LC designation distinguishes it from the standard PIC16C57C (4.0V to 6.0V) by extending operation down to 3.0V, enabling battery-powered designs. The part supports 12-bit wide instruction words, providing 2:1 code compression versus competing 8-bit architectures in the same class. The PIC16LC57C-04/SP uses a Harvard bus architecture with separate program and data memories, which allows instruction fetch and operand access to occur in the same cycle. This contributes to its deterministic 4 MHz / 100 ns per-instruction performance and predictable interrupt-free timing. The two-level hardware stack limits nested subroutines but simplifies the core, reducing silicon cost. Typical applications include consumer appliances (remote controls, toys, small kitchen appliances), low-end industrial control (sensor interfaces, simple motor drivers), automotive body electronics (interior lighting, seat controllers), and battery-powered instruments. The wide 3.0V-6.25V operating range makes it suitable for both 3.3V and 5V rails, while the 20 I/O pins provide ample connectivity for typical peripheral sets. When designing with the PIC16LC57C-04/SP, remember that OTP memory is one-time programmable - any firmware bug requires physical replacement of the chip. Engineers should fully validate firmware on a windowed CERDIP prototype (PIC16C57C-04/JW) before committing to OTP production units. The two-level hardware stack also requires careful assembly programming to avoid deep call nesting. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found on the manufacturer datasheet alone, giving procurement and engineering teams a single reference for sourcing and substituting this mature PIC16C5X baseline MCU.

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PIC16LC57C-04/SS - 8-Bit MCU 3KB OTP 4MHz 28-SSOP | Microchip
PIC16LC57C-04/SS

PIC16LC57C-04/SS - 8-Bit MCU 3KB OTP 4MHz 28-SSOP | Microchip

The Microchip Technology PIC16LC57C-04/SS is an 8-bit RISC CMOS microcontroller from the PIC16C5X family, integrating 3 KB of one-time-programmable (OTP) program memory, 72 bytes of RAM, and 20 general-purpose I/O pins in a 28-pin SSOP package (0.209" / 5.30 mm width, commercial 0C to +70C temperature grade). It executes instructions at a 4 MHz clock rate, providing 4 MHz instruction cycle performance for cost-sensitive embedded applications. An 8-bit microcontroller is a single-chip computer that combines a CPU, memory, and peripherals on a single die. The PIC architecture uses a 12-bit wide instruction word and a Harvard memory layout, which provides 2:1 code compression relative to other 8-bit MCUs in its class. The PIC16LC57C sits within the broader taxonomy of microcontrollers -> 8-bit microcontrollers -> CMOS RISC microcontrollers -> embedded controllers -> semiconductors, and represents one of the lowest-cost entry points in Microchip's mid-range PIC portfolio. Key features include 33 instructions, a 12-bit instruction word, 8-bit data path, 8-level hardware stack, 2 K x 12 OTP program memory, 72 x 8 RAM, four I/O ports (RA, RB, RC, RD), and 8-bit timer with watchdog. The 'C' suffix indicates the CMOS process technology with low power consumption, and the '04' speed designation specifies the 4 MHz oscillator/clock rate. The 'LC' prefix identifies the low-voltage core (2.5V-5.5V) for battery-friendly operation. Typical applications include low-cost consumer electronics, remote controls, small appliances, LED controllers, simple sensor interfaces, and battery-powered devices. The wide 2.5V-5.5V operating range supports both 3.3V and 5V system rails, while the OTP memory is well-suited for production volumes where firmware is finalized and field reprogramming is not required. When designing with this MCU, consider that OTP memory cannot be reprogrammed in-circuit - prototypes should use the windowed JW or UV-erasable variant for development. Power-on reset and watchdog timer improve field reliability, but external decoupling (0.1 uF ceramic near VDD) is mandatory for stable oscillator operation. This page synthesizes distributor pricing, drop-in alternatives within the same 28-SSOP footprint, and practical design notes not found in the manufacturer datasheet alone, helping engineers evaluate sourcing options and pin-compatible replacements.

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PIC16LC57C-04I/P - 8-Bit 4MHz OTP MCU 3KB | Microchip | DIP-28
PIC16LC57C-04I/P

PIC16LC57C-04I/P - 8-Bit 4MHz OTP MCU 3KB | Microchip | DIP-28

The Microchip PIC16LC57C-04I/P is an 8-bit RISC microcontroller from the PIC16C5X family, featuring 3KB (2K x 12) of One-Time-Programmable (OTP) program memory, 72 bytes of RAM, and 20 digital I/O pins in a 28-pin PDIP through-hole package. Operating at a maximum clock speed of 4 MHz, the device belongs to the "LC" low-voltage sub-family and supports both 3.3V and 5V operation, making it suitable for battery-powered and low-power embedded designs. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, data RAM, and peripherals on one silicon die. The PIC16C5X family specifically uses a RISC architecture with only 33 single-word/single-cycle instructions, simplifying code development and reducing execution overhead. The OTP memory variant allows one-time field programming - cheaper than flash but intended for volume production where code is fixed. Positioned within the broader product hierarchy: 8-bit MCU -> microcontroller -> embedded processor -> semiconductor IC, the PIC16LC57C bridges classic PIC legacy designs and modern low-power applications. Key features include 4 MHz maximum operating frequency, 2K x 12-bit program word width, 72 bytes of general-purpose RAM, 20 bidirectional I/O pins, an 8-bit timer/counter, and a watchdog timer for reliable operation. The device operates across an industrial temperature range of -40C to +85C, satisfying the "I" (Industrial) suffix designation. Its wide voltage range (typically 2.5V to 6.0V for LC variants) supports both 3.3V and 5V rails commonly found in consumer, industrial, and battery-powered systems. The PIC16LC57C employs Microchip's classic Harvard RISC architecture with a separate program and data bus, enabling single-cycle instruction execution except for program branches. With its OTP-based program memory and CMOS implementation, the device balances cost efficiency with deterministic real-time performance, ideal for high-volume embedded control where flash reprogrammability is not required. Typical applications include appliance control, sensor interfaces, LED driving, low-cost consumer electronics, industrial automation peripherals, and battery-operated devices requiring low quiescent power. Its through-hole PDIP-28 package also makes it convenient for prototyping, hobbyist projects, and educational use where hand-soldering or socketed replacement is desirable. When designing with this part, note that OTP memory cannot be erased or rewritten - firmware must be fully validated before programming. For modern designs requiring in-field updates, consider the PIC16F5X flash-based successor family instead. Engineers should also note that the LC variant's lower voltage limit may require level shifting when interfacing with 5V-only peripherals. This page synthesizes distributor pricing, drop-in alternatives from the same PIC16C5X family, and practical design considerations not found in the standalone Microchip datasheet.

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PIC16LC57C-04I/SO - 8-Bit 4MHz OTP MCU 28-SOIC | Microchip
PIC16LC57C-04I/SO

PIC16LC57C-04I/SO - 8-Bit 4MHz OTP MCU 28-SOIC | Microchip

The Microchip Technology PIC16LC57C-04I/SO is an 8-bit CMOS RISC microcontroller from the PIC16C5X family, featuring a 4 MHz maximum clock speed, 3 KB (2K x 12) of OTP program memory, and 72 bytes of RAM, housed in a 28-pin SOIC wide-body package. The "LC" prefix denotes the low-voltage CMOS variant supporting 2.5 V to 5.5 V operation, while the "-04" suffix indicates the 4 MHz speed grade and the "I" suffix marks the industrial temperature range of -40 °C to +85 °C. An OTP-based PIC microcontroller is a Harvard-architecture device that uses one-time-programmable non-volatile memory for program storage. It belongs to the broader hierarchy: microcontroller -> embedded MCU -> 8-bit MCU -> PIC16 family -> RISC MCU -> semiconductor IC. The PIC16C5X family uses a 12-bit-wide instruction set with only 33 single-word instructions, delivering highly symmetrical code that compresses 2:1 over competing 8-bit microcontrollers of its class. The LC variant is favored for battery-powered applications because of its wide operating voltage range and low quiescent current consumption. Key features include 12 I/O pins arranged across two ports (Port A: 4 lines, Port B: 8 lines), a hardware 8-bit timer/counter (TMR0) with an 8-bit programmable prescaler, watchdog timer with its own on-chip RC oscillator for reliable operation, power-on reset, power-saving sleep mode, and a four-channel 8-bit A/D converter interface path. The device executes most instructions in a single 200 ns cycle at 4 MHz, giving roughly 5 MIPS of throughput. Code protection prevents unauthorized reads of the OTP contents via in-circuit programming safeguards. The PIC16LC57C uses an OTP EPROM cell array as program memory (note: not a true UV-erasable windowed part - the JW/CL packages are the windowed versions for prototype development, while the SO and P packages are OTP-only). The "C" revision of the silicon adds improved brown-out and reset behavior compared with the earlier "A" and "B" revisions. Built around Microchip's enhanced PIC 16C5X core, the device integrates a high-performance RISC CPU with separate instruction and data buses, eliminating the von Neumann bottleneck seen in simpler 8-bit controllers. Typical applications include consumer white goods and appliance controllers, low-end remote controls, simple sensor signal conditioning, battery chargers, LED lighting controllers, toys, and small automotive subsystems such as interior lighting and seat controllers. The wide 2.5 V to 5.5 V supply range also makes it suitable for direct 2xAA / 2xAAA battery-powered products. Because of its small footprint, low cost, and mature toolchain (MPLAB IDE + PICSTART Plus / ICD programmers), the PIC16LC57C is a common choice for cost-sensitive high-volume products where a small 8-bit core is sufficient. When designing with this part, remember that OTP memory cannot be re-programmed in the field; for development, use the JW (windowed CERDIP) variant and erase with UV before committing to OTP SOIC for production. Ensure decoupling capacitors of 0.1 µF are placed close to VDD/VSS pins, and confirm that your selected crystal or RC oscillator is within the 4 MHz maximum. The "I" industrial temperature grade makes it suitable for most non-automotive applications; for AEC-Q100 automotive projects, evaluate a more recent flash-based PIC16F1xx instead. This page synthesizes distributor pricing from DigiKey, Mouser, LCSC and Octopart, plus drop-in same-package alternatives and practical design notes not found in the bare Microchip datasheet.

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PIC16LC57C-04I/SP - 3KB OTP 8-bit MCU, 4MHz, SPDIP-28 | Microchip
PIC16LC57C-04I/SP

PIC16LC57C-04I/SP - 3KB OTP 8-bit MCU, 4MHz, SPDIP-28 | Microchip

The Microchip PIC16LC57C-04I/SP is an 8-bit CMOS RISC microcontroller from the PIC16C5X family, offered in a 28-pin SPDIP (Skinny Plastic DIP) through-hole package. The device integrates 2KB (3KB equivalent) of One-Time-Programmable (OTP) EPROM program memory and 72 bytes of RAM, executes instructions in a 200 ns single-cycle time at 4 MHz, and provides 20 digital I/O pins across two ports (PORTA and PORTB). What is a PIC16C5X microcontroller? The PIC16C5X family is Microchip Technology's foundational low-cost, high-performance 8-bit fully-static EPROM/ROM-based CMOS microcontroller line, employing a RISC architecture with only 33 single-word/single-cycle instructions. In the broader taxonomy, it sits as: 8-bit microcontroller -> RISC MCU -> embedded controller -> semiconductor IC. These devices target cost-sensitive 8-bit embedded designs where deterministic instruction timing and minimal external component count are priorities. The PIC16LC57C variant operates from 3.0V to 6.25V (the "LC" prefix indicates low-voltage/low-power CMOS) with an industrial temperature range of -40C to +85C (the "I" suffix). The "-04" speed grade denotes 4 MHz maximum oscillator frequency. The device features a watchdog timer, power-on reset, and 8-bit real-time counter/capacitive discharge oscillator. Unlike the UV-erasable CERDIP-18 variant, the SP package is a plastic OTP device intended for production volumes. Key architecture features include a 12-bit instruction word, two 8-bit I/O ports (RA and RB), 8-bit timer with programmable prescaler, and a hardware comparator. The Harvard-style separate program/data buses enable simultaneous instruction fetch and data access, supporting the 33-instruction RISC instruction set. Typical applications include consumer appliance controls, simple sensor interfaces, automotive body electronics (non-safety), battery-powered instruments, and low-cost replacement of discrete logic. The 4 MHz clock and compact instruction set suit real-time control loops with deterministic timing. Design consideration: The PIC16LC57C uses a 12-bit core, so code compiled for PIC16F1xxx or PIC18 devices is NOT compatible - confirm your toolchain (MPASM/MPASMX or XC8 legacy mode) targets the 16C5X core before reusing firmware. This page synthesizes distributor pricing, pin-compatible PIC16C5X family alternatives, and practical design notes not collected in a single manufacturer table.

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PIC16LC57CT-04/SO - 8-Bit OTP MCU, 4MHz, 3KB | Microchip
PIC16LC57CT-04/SO

PIC16LC57CT-04/SO - 8-Bit OTP MCU, 4MHz, 3KB | Microchip

The Microchip Technology PIC16LC57CT-04/SO is an 8-bit PIC16C5X-family CMOS microcontroller built around a RISC architecture, delivering 4 MHz maximum clock speed with 3 KB (2K x 12) of One-Time Programmable (OTP) program memory and 72 bytes of RAM, housed in a 28-pin SOIC surface-mount package. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, data RAM, and peripheral I/O on one silicon die. Within the broader semiconductor hierarchy, microcontrollers belong to the embedded computing category, sitting alongside microprocessors, DSPs, and FPGAs. The PIC16C5X family specifically targets cost-sensitive 8-bit applications where deterministic instruction execution, low power, and small footprint outweigh the need for high computational throughput. PIC16C5X MCUs use a 12-bit instruction word (vs. 14-bit for mid-range PICs), which simplifies the decoder logic and keeps die size minimal. Key features of the PIC16LC57CT-04/SO include 20 digital I/O pins organized across three ports (RA, RB, RC), two 8-bit timer/counters, a watchdog timer with on-chip RC oscillator, power-on reset, and code protection. The device supports an operating voltage range of 3.0 V to 6.25 V with a commercial temperature range of 0 °C to +70 °C. Its CMOS process combined with sleep mode delivers very low standby current for always-on appliances. The LC suffix in the part number designates the low-power CMOS process variant, distinguishing it from the standard PIC16C57 (which uses EPROM/UV erasable memory) and from the PIC16CR57 (which uses mask ROM). The T suffix indicates Tape & Reel packaging, while -04 denotes the 4 MHz speed grade. All PIC16C5X family members share a common instruction set and pinout, simplifying code portability across family members. Typical applications include consumer appliances, simple motor control, automotive body electronics, security alarm panels, and low-cost remote-control transmitters. The 12-bit-wide OTP memory allows cost-optimized one-time programming in volume production without the tooling cost of mask ROM. The 28-SOIC package also supports automated pick-and-place assembly for medium-volume production runs. When designing with this part, ensure your development strategy accounts for OTP memory limitations - since OTP can only be programmed once, code must be fully validated on an emulator or windowed CERDIP version (PIC16C57/JW) before committing to production. Brown-out detection and watchdog timer should be enabled for unattended installations. This page synthesizes distributor pricing, drop-in alternatives from the PIC16C5X family, and practical design notes not found in the manufacturer datasheet.

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PIC16LC57CT-04/SS - 8-Bit 4MHz OTP MCU 3KB | Microchip
PIC16LC57CT-04/SS

PIC16LC57CT-04/SS - 8-Bit 4MHz OTP MCU 3KB | Microchip

The Microchip Technology PIC16LC57CT-04/SS is an 8-bit, fully-static, EPROM/ROM-based CMOS microcontroller from the PIC16C5X family, delivering 4 MHz CPU clock speed with 3 KB (2K x 12) of One-Time-Programmable (OTP) program memory in a 28-pin SSOP surface-mount package. It features 20 digital I/O lines, Power-On Reset (POR), Watchdog Timer (WDT), and a 5 V operating supply, providing a baseline cost-optimized RISC controller for low-to-mid complexity embedded applications. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, working RAM, and peripheral I/O onto one silicon die, allowing it to read sensors, drive outputs, and execute user firmware without external logic. Within the broader taxonomy, the PIC16C5X family sits in the 8-bit RISC MCU segment, alongside other legacy PIC microcontrollers that prioritized deterministic instruction execution and code density (12-bit wide instructions yield roughly 2:1 code compression over 8-bit-wide instruction MCUs of the same era). The 'LC' prefix indicates the low-power CMOS process variant designed for battery-aware designs, and the 'T' suffix indicates tape-and-reel packaging. Key features of the PIC16LC57CT-04/SS include 4 MHz maximum operating frequency (the '04' speed grade), 3 KB OTP program memory organized as 2K x 12, a Harvard RISC architecture with only 33 single-word/ single-cycle instructions, 20 general-purpose digital I/O pins multiplexed with peripheral functions, an internal Power-On Reset, a Watchdog Timer for runaway code recovery, and a commercial temperature grade. The OTP memory allows one-time field programming using standard EPROM programmers, which is useful for low-volume production or design validation before ROM mask versions are ordered. Architecturally, the PIC16C5X uses a 12-bit instruction word with a two-stage pipeline, where every instruction (except branches) executes in one oscillator cycle, giving 4 MIPS at 4 MHz clock. The 8-bit ALU operates on a 7-level hardware stack for subroutine nesting, and 25 special-function registers control I/O and peripheral configuration. Compared with 8051-class MCUs of the same era, the PIC16C5X delivers significantly higher code density and a much smaller die footprint, but lacks on-chip Flash and modern peripherals such as UART, ADC, or PWM hardware. Typical applications for this device include legacy industrial control logic, appliance controllers, sensor signal conditioning front-ends, simple state machines, and educational or hobby projects where a 4 MHz 8-bit controller is sufficient. It is also used as a cost-down mask-ROM alternate to higher-end PIC microcontrollers in volume production. When designing with the PIC16LC57CT-04/SS, note that OTP memory cannot be re-programmed in-circuit; develop code on a windowed (UV-erasable) or flash-based PIC variant and validate firmware completely before ordering OTP parts. The device is now considered legacy; verify long-term availability before committing to new designs. This page synthesizes verified distributor pricing, parametric data, same-brand drop-in alternatives within the PIC16C5X family, and practical design notes not consolidated in the manufacturer datasheet.

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PIC16LC57CT-04I/SO - 8-Bit 4MHz OTP MCU 3KB 28-SOIC | Microchip
PIC16LC57CT-04I/SO

PIC16LC57CT-04I/SO - 8-Bit 4MHz OTP MCU 3KB 28-SOIC | Microchip

The Microchip Technology PIC16LC57CT-04I/SO is an 8-bit RISC microcontroller from the PIC16C5X family, featuring 3KB (2K x 12) of One-Time Programmable (OTP) program memory, 72 x 8 bytes of RAM, and a maximum clock speed of 4 MHz, all housed in a 28-pin SOIC wide-body package. The device operates across an industrial temperature range of -40C to +85C and is supplied in tape-and-reel packaging for surface-mount production lines. A PIC microcontroller is a low-cost, high-performance 8-bit fully-static CMOS MCU based on a RISC architecture, sitting in the broader taxonomy of microcontroller -> embedded processor -> semiconductor IC. The PIC16C5X family uses 12-bit wide instructions that are highly symmetrical, yielding roughly 2:1 code compression versus competitive 8-bit MCUs in the same price tier, while the simplified instruction set reduces development time. The PIC16LC57CT-04I/SO uses an EPROM/OTP process and is part of the low-power LC variant of the PIC16C57 lineage. Key features include a 33-instruction set, 12-bit instruction word, two 8-bit I/O ports, a watchdog timer, an 8-bit real-time counter with 8-bit prescaler, and on-chip power-on reset. The wide-body 28-SOIC (0.295-inch / 7.50mm) package gives a robust land pattern suitable for hand-rework and production-friendly assembly, while the industrial -40C to +85C temperature range supports factory-floor and outdoor installations. Architecturally, the device separates program memory (12-bit wide OTP EPROM) from data memory (8-bit wide static RAM), which simplifies firmware development and field programming. The 4 MHz maximum oscillator frequency yields a 1 microsecond instruction cycle, sufficient for simple control loops, user-interface scan routines, and low-speed sensor polling. The CMOS design reduces quiescent current compared with NMOS predecessors and supports battery-backed applications when paired with a sleep oscillator. Typical applications include appliance control boards, HVAC zone controllers, low-end consumer remote controls, industrial timers, vending-machine logic boards, and simple LED display drivers. The 3KB OTP memory budget accommodates state-machine firmware with look-up tables but is too small for protocol stacks such as TCP/IP or USB, so designers typically choose PIC16LC57CT-04I/SO for deterministic, loop-based control tasks rather than connected-edge applications. When designing with this part, verify that your firmware will fit within 2K x 12 words of OTP and that you have a programming strategy (gang programmer or ICSP) ready before committing to PCB layout. Note that OTP parts cannot be reprogrammed in-circuit once sealed by the package; use the PIC16F57 equivalent (Flash) if in-system firmware updates are required. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet.

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PIC16LC57CT-04I/SS - 4MHz 8-Bit OTP MCU 28-SSOP | Microchip
PIC16LC57CT-04I/SS

PIC16LC57CT-04I/SS - 4MHz 8-Bit OTP MCU 28-SSOP | Microchip

The Microchip Technology PIC16LC57CT-04I/SS is a member of the PIC16C5X family of low-cost, high-performance, 8-bit, fully static, EPROM/ROM-based CMOS microcontrollers operating at 4 MHz in a 28-pin SSOP package. It integrates 3 KB (2K x 12) of One-Time Programmable (OTP) program memory, 72 bytes of data RAM, and 20 general-purpose I/O pins, supplied from a 4.5 V to 5.5 V rail. The device targets cost-sensitive embedded control applications that demand deterministic RISC execution with minimal external component count. An 8-bit microcontroller (MCU) is a single-chip computer that combines a CPU, program memory, data RAM, and peripheral set on one silicon die. The PIC16C5X family belongs to the OTP/EPROM-based CMOS 8-bit MCU category, which sits within the broader microcontroller taxonomy of: MCU -> 8-bit MCU -> RISC MCU -> PIC family. These devices are optimized for low-power operation, simple peripheral integration, and small-form-factor designs. Key features of the PIC16LC57CT-04I/SS include a 33-instruction RISC instruction set with 12-bit-wide opcodes yielding approximately 2:1 code compression versus competing 8-bit architectures, a Power-on Reset (POR) circuit, an integrated Watchdog Timer (WDT) with dedicated on-chip RC oscillator, an 8-bit real-time timer/counter with 8-bit prescaler, and a programmable code-protection mechanism. The industrial-grade -40C to +85C operating range and SSOP-28 footprint make it well suited for space-constrained designs. Architecturally, the PIC16LC57CT-04I/SS uses a Harvard architecture with separate program and data buses, a 12-bit instruction word, and a two-stage pipeline that allows most instructions to execute in a single clock cycle at 4 MHz (250 ns instruction time). On-chip peripherals are mapped to a small register file to keep context-switch latency minimal. Typical applications include low-cost appliance controllers, remote sensor signal conditioning, LED driver sequencers, simple user-interface panels, battery chargers, and consumer white-goods motor controllers. Industrial uses span logic replacement, smart metering peripherals, and cable equalization front-ends. When designing with this part, derate clock speed at high temperature corners and verify that the EPROM programming algorithm timing (per Microchip programming specification) is observed to avoid OTP programming failures. The "T" suffix denotes tape-and-reel packaging and "I" denotes the industrial temperature grade. This page synthesizes distributor pricing, SSOP-28 drop-in alternatives drawn from the same PIC16C5X silicon family, and design notes that go beyond the manufacturer datasheet to accelerate sourcing and PCB bring-up decisions.

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PIC16LC58B-04/P - 8-Bit 4MHz OTP MCU 3KB | Microchip | PDIP-18
PIC16LC58B-04/P

PIC16LC58B-04/P - 8-Bit 4MHz OTP MCU 3KB | Microchip | PDIP-18

The Microchip PIC16LC58B-04/P is a low-power CMOS 8-bit RISC microcontroller from the PIC16C5X family, providing 4 MHz CPU clock speed, 3 KB (2K x 12) of One-Time Programmable (OTP) program memory, and 73 bytes of RAM in a through-hole 18-pin PDIP package. The 'LC' suffix indicates the low-voltage CMOS variant operating from 2.5 V to 6.25 V, suitable for battery-backed and portable applications where reduced power consumption is required compared to the standard 'C' part. The '-04' speed designator indicates a 4 MHz maximum oscillator frequency, and the '/P' suffix denotes the plastic DIP-18 package. An 8-bit PIC microcontroller is a Harvard-architecture RISC processor with separate program and data buses, executed from a fixed instruction set. PIC microcontrollers occupy the hypernym hierarchy 8-bit MCU -> microcontroller -> embedded processor -> semiconductor IC. They are widely used in cost-sensitive embedded applications due to their small footprint, deterministic instruction timing, and simple development tooling. Key features of the PIC16LC58B-04/P include 12 I/O pins, a two-level deep hardware stack, direct/indirect/relative addressing modes, seven or eight special-function hardware registers, 12-bit-wide instructions with an 8-bit data path, and 33 single-word instructions. The reduced instruction set executes in a single instruction cycle (except branches which take two cycles), giving an effective throughput of 4 MIPS at 4 MHz. Typical applications include low-cost consumer appliances, battery-powered remote controls, sensor signal conditioning front-ends, simple LED drivers, and legacy industrial control replacements where pin-compatibility with older PIC16C5X designs is required. The OTP program memory allows single-pass programming for production units, lowering per-unit cost compared to flash variants. When designing with this device, ensure the MCLR reset pin is pulled high through a 10 kohm resistor and that a proper decoupling capacitor (100 nF) is placed within 5 mm of VDD. Note that OTP parts cannot be reprogrammed - design firmware thoroughly before committing to production volumes.

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PIC16LC58B-04/SO - 8-Bit 4MHz OTP MCU 3KB | Microchip
PIC16LC58B-04/SO

PIC16LC58B-04/SO - 8-Bit 4MHz OTP MCU 3KB | Microchip

The Microchip Technology PIC16LC58B-04/SO is an 8-bit RISC microcontroller from the PIC16C5X family running at up to 4 MHz, integrating 3KB of OTP program memory (2K x 12 words) and 73 bytes of RAM, packaged in an 18-pin SOIC (SO-18, 0.300-inch, plastic SO). It targets cost-sensitive embedded control applications requiring deterministic performance, low power, and a minimal external component count. What is a PIC microcontroller? A PIC (Peripheral Interface Controller) microcontroller is a compact, self-contained computer-on-a-chip built around a Harvard RISC architecture with separate program and data buses. Microchip's PIC16C5X family pioneered low-cost 8-bit OTP/EPROM/ROM MCUs, with the PIC16C5X positioned in the hierarchy as: PIC16C5X -> PIC16 family -> 8-bit MCU -> microcontroller -> embedded computing IC. The 'LC' suffix designates the low-power CMOS variant, while the 'B' suffix marks the second silicon revision. Key features include 12 I/O pins across two ports, a two-level deep hardware stack, a single 8-bit timer/counter, watchdog timer with on-chip RC oscillator, power-on reset, and a wide 2.5V to 6.25V supply voltage range. The 4 MHz oscillator frequency provides 1 microsecond instruction cycle time, and the RISC architecture delivers most instructions in a single cycle. The PIC16LC58B uses a 12-bit wide instruction word with a separate 8-bit data path, producing 2:1 code compression versus typical 8-bit CISC architectures. Seven or eight special function hardware registers support direct, indirect, and relative addressing modes. The fully static CMOS design allows clock stopping for ultra-low standby power. Typical applications include appliance control, automotive body electronics, industrial sensor interfacing, low-end consumer products, and battery-powered instrumentation. The 18-pin SOIC package suits both prototyping and space-constrained production boards, while the OTP memory suits low-volume and cost-driven designs. When designing with this part, note that OTP parts require a device programmer for code loading - choose flash-based PIC16F equivalents for in-field reprogrammability. The PIC16LC58B-04/SO is the commercial temperature grade variant (0C to +70C operating range); the 'I' suffix (PIC16LC58B-04I/SO) specifies industrial -40C to +85C. This page synthesizes distributor pricing, parametric drop-in alternatives, and practical design guidance not found in the manufacturer datasheet alone.

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PIC16LC58B-04/SS - 8-bit 4MHz OTP MCU 3KB | Microchip | 20-SSOP
PIC16LC58B-04/SS

PIC16LC58B-04/SS - 8-bit 4MHz OTP MCU 3KB | Microchip | 20-SSOP

The Microchip Technology PIC16LC58B-04/SS is an 8-bit CMOS RISC microcontroller from the PIC16C5X family, featuring 3KB (2K x 12) of One-Time-Programmable (OTP) program memory, 73 bytes of RAM, and 12 I/O lines, all packaged in a 20-pin Shrink Small-Outline Package (SSOP). It operates from a 2.5V to 6.25V supply and executes instructions at a 4 MHz clock rate using a 12-bit-wide instruction word with an 8-bit data path. What is a PIC16C5X microcontroller? The PIC16C5X family is a baseline-tier 8-bit Harvard-architecture RISC microcontroller family from Microchip Technology, widely used as a low-cost, high-performance, fully-static EPROM/ROM-based MCU. It sits at the entry level of Microchip's PIC hierarchy, between simpler 4-bit microcontrollers and the mid-range PIC16F/Enhanced PIC families, and belongs to the broader 8-bit microcontroller category within embedded microcontrollers and semiconductors. Key features of the PIC16LC58B-04/SS include seven or eight special-function hardware registers, a two-level deep hardware stack, and support for direct, indirect, and relative addressing modes. The "LC" suffix designates the low-voltage CMOS process node (2.5V to 6.25V), while the "-04" speed grade denotes a 4 MHz maximum oscillator frequency. The device is fully static, allowing the clock to be stopped without losing internal state. Typical applications for the PIC16LC58B-04/SS include low-power board designs, simple industrial control, embedded automation, motor control, and metering. The 20-SSOP package with 0.65 mm pitch makes it suitable for compact through-hole-replacement designs where board space is constrained but ease of assembly and rework is required. When designing with this part, note that the OTP program memory can only be programmed once - for prototyping consider the PIC16C58B-04/SS (windowed CERDIP) or a flash-based PIC16F equivalent such as PIC16F54.

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PIC16LC58B-04I/SO - 4MHz 8-bit OTP MCU, 3KB, 12 I/O | Microchip
PIC16LC58B-04I/SO

PIC16LC58B-04I/SO - 4MHz 8-bit OTP MCU, 3KB, 12 I/O | Microchip

The Microchip Technology PIC16LC58B-04I/SO is an 8-bit CMOS RISC microcontroller from the PIC16C5X family featuring 4MHz maximum clock speed, 3KB (2K x 12) One-Time Programmable (OTP) program memory, and 73 bytes of RAM, housed in an 18-pin SOIC package. Designed for low-cost, high-performance embedded control, it delivers 12-bit-wide instructions with 2:1 code compression versus competing 8-bit microcontrollers, and provides 12 digital I/O pins for sensor, switch, and actuator interfacing. A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory, and peripherals. The PIC16C5X family belongs to the 8-bit microcontroller category within the broader embedded processor hierarchy: 8-bit MCU -> microcontroller -> embedded processor -> semiconductor. These devices target cost-sensitive applications where deterministic execution, low power, and small code footprint outweigh the need for high clock speed or large memory. Within Microchip's portfolio, the PIC16C5X is positioned as a baseline OTP/EPROM-based family suited for high-volume, mature designs. Key features of the PIC16LC58B-04I/SO include 4MHz operation, seven or eight special-function hardware registers, a two-level-deep hardware stack, and direct, indirect, and relative addressing modes. The 12-bit instruction word with an 8-bit data path provides efficient code density, and the 2.5V to 6.25V supply range supports both 3.3V and 5V system rails. The "LC" voltage class is optimized for lower VDD operation, while the "I" suffix denotes the industrial -40C to +85C temperature range. The 18-SOIC package with 1.27mm pitch is compatible with standard surface-mount assembly lines. The PIC16LC58B uses a fully static CMOS core, allowing the clock to be stopped without losing register state, which simplifies power-saving designs. Its RISC architecture with only 33 single-cycle instructions enables predictable timing and fast interrupt response. The two-level hardware stack limits nested subroutine depth but reduces context-switch overhead for shallow call chains typical in appliance, sensor, and motor-control firmware. Typical applications include consumer appliances, battery chargers, LED lighting controllers, simple sensor interfaces, and low-end automotive body modules. The wide supply range and industrial temperature grade make it suitable for factory automation peripherals and HVAC controllers where reliability and cost dominate. When designing with this device, allocate sufficient OTP programming margin and verify code size within 2K 12-bit words before committing to mask-ROM or OTP volume orders; consider the PIC16F5X flash-based family if in-field reprogrammability is required.

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PIC16LC58BT-04/SO - 8-Bit 4MHz OTP MCU 3KB | Microchip | 18-SOIC
PIC16LC58BT-04/SO

PIC16LC58BT-04/SO - 8-Bit 4MHz OTP MCU 3KB | Microchip | 18-SOIC

The Microchip Technology PIC16LC58BT-04/SO is an 8-bit RISC microcontroller from the PIC16C5X family, featuring a 4 MHz clock speed, 3 KB (2K x 12) of One-Time Programmable (OTP) program memory, 73 bytes of RAM, and 12 digital I/O pins, all housed in a surface-mount 18-pin SOIC package. The 'LC' prefix denotes the low-power CMOS process, allowing operation across a 2.5 V to 6.25 V supply range, while the 'T' suffix identifies a tape-and-reel packaging variant and the '-04' speed grade indicates the 4 MHz maximum oscillator frequency. A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory, and peripheral interfaces. The PIC16LC58B belongs to the baseline PIC16C5X architecture, which executes 12-bit-wide instructions on an 8-bit data path with a two-level deep hardware stack. This family sits within the broader hierarchy: microcontroller -> embedded processor -> semiconductor IC. The RISC-like instruction set with only 33 single-word instructions and fixed instruction timing simplifies firmware development and predicts cycle-accurate behavior, making this device attractive for cost-sensitive, deterministic control tasks. Key features include 12 I/O ports with bidirectional direction control, a watchdog timer for unattended operation, a programmable prescaler for timer-based event counting, and power-on reset. The OTP program memory enables prototype-to-production migration without NRE mask charges, and the 4 MHz clock supports instruction execution at 1 MHz (4 oscillator cycles per instruction cycle). Internal RC oscillator options reduce external component count, while the 18-SOIC package provides a manageable 0.300-inch body suitable for hand-soldered prototypes and automated assembly. Typical applications include consumer appliance control, automotive body electronics (non-safety), battery chargers, simple sensor interfaces, low-end remote controls, and replacement of discrete logic in space-constrained designs. Engineers frequently select this part for legacy product refreshes, industrial control panels, and educational development platforms where deterministic execution and minimal BOM cost outweigh the need for large memory or advanced peripherals. When designing with the PIC16LC58BT-04/SO, verify that the application's maximum clock requirement does not exceed 4 MHz and confirm supply voltage stays within 2.5 V to 6.25 V. Use Microchip's MPASM assembler or MPLAB X IDE with the PIC16C5X toolchain for firmware development. Programming requires a PICkit or compatible device programmer supporting baseline OTP devices. This page synthesizes distributor stock levels, parametric drop-in alternatives, and practical design notes that go beyond the manufacturer datasheet summary. XAIPART provides real-time pricing across quantity breaks as of 2026-09-22, helping procurement teams compare this 18-SOIC baseline MCU against modern PIC16F1xxx successors and competing 8-bit microcontrollers.

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PIC16LC58BT-04I/SS - 8-Bit 4MHz OTP MCU 3KB 20-SSOP | Microchip
PIC16LC58BT-04I/SS

PIC16LC58BT-04I/SS - 8-Bit 4MHz OTP MCU 3KB 20-SSOP | Microchip

The Microchip Technology PIC16LC58BT-04I/SS is an 8-bit PIC16C5X family CMOS microcontroller featuring 3KB (2K x 12) of One-Time Programmable (OTP) program memory, 73 bytes of RAM, and 12 I/O lines, housed in a 20-pin SSOP package. It operates from a 2.5V to 6.25V supply and runs at a maximum clock speed of 4 MHz in a fully static CMOS core. The 'LC' prefix designates the low-voltage (2.5V–6.25V) variant of the PIC16C58B family, while the 'T' suffix denotes tape-and-reel packaging and 'I' indicates the industrial -40C to +85C temperature grade. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, RAM, non-volatile program memory, and peripheral I/O on one die. The PIC16C5X family belongs to the legacy PIC baseline architecture (12-bit wide instructions, 8-bit wide data path), positioned in the broader taxonomy as: PIC16C5X -> PIC16C family -> PIC baseline core -> 8-bit MCU -> microcontroller -> embedded processor -> semiconductor. This architecture uses a two-level deep hardware stack with seven or eight special-function hardware registers and supports direct, indirect, and relative addressing modes for compact code density. Key features include 12-bit instruction width, 8-bit data path, two-level deep hardware stack, 7-8 special function hardware registers, 12 bidirectional I/O pins, and a Watchdog Timer for reliable operation. The fully static CMOS design allows the clock to be stopped without losing register state, and the OTP program memory supports in-system programming via Microchip's ICSP protocol. The PIC16LC58BT series is widely used in cost-sensitive, low-power embedded applications where deterministic real-time response is more important than raw compute throughput. Typical applications include industrial control modules, appliance controllers, security alarm panels, sensor signal conditioning front-ends, low-cost remote-control encoders, and general-purpose glue-logic replacement. The 12 I/O pins can drive displays, relays, keypads, or serial interfaces via firmware bit-banging. Compared to flash-based PIC16F1xxx parts, the OTP memory is one-time programmable which lowers unit cost and provides slightly better code security against reverse engineering. When designing with this part, allocate a 4-pin ICSP header (VDD, VSS, RB6, RB7) for in-system programming and reserve the MCLR/VPP pin as a reset input. Because the OTP memory cannot be erased, use a socketed SSOP footprint during prototyping or a PIC16CR58B/ROM-equivalent variant for volume code-rotation flexibility. Decouple VDD with a 100nF ceramic placed within 5mm of the VDD pin and add a 10k pull-up on MCLR for reliable reset behavior.

RFQ İletişim
PIC16LC620-04/P - 4MHz 8-Bit OTP MCU, 13 I/O, 18-PDIP | Microchip
PIC16LC620-04/P

PIC16LC620-04/P - 4MHz 8-Bit OTP MCU, 13 I/O, 18-PDIP | Microchip

The Microchip Technology PIC16LC620-04/P is an 8-bit EPROM-based CMOS microcontroller in the PIC16C family, housed in an 18-pin PDIP through-hole package. It features a 4 MHz maximum clock input (200 ns single-cycle instruction execution, except two-cycle branches), 896 bytes of One-Time Programmable (OTP) program memory organized as 512 x 14 words, and 80 bytes of on-chip data RAM with 13 digital I/O pins. The 'LC' suffix indicates a low-power CMOS variant operating across 2.5 V to 6.0 V (per datasheet characterization), making it well suited to battery and 5 V regulated designs. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, RAM, non-volatile program memory, and I/O peripherals on one die. The PIC16C family uses a RISC-like Harvard architecture with 35 single-word instructions, an 8-bit data path, and a 14-bit instruction word, placing it in the broader taxonomy of microcontroller -> embedded controller -> semiconductor. PIC16C parts preceded the flash-based PIC16F series and were widely deployed in low-cost appliance, industrial, and consumer products before flash erased OTP as the dominant technology. Key features include a 20 MHz maximum clock input (the '-04' speed grade limits operation to 4 MHz), an internal RC oscillator option, a 5-bit comparator with reference, a Capture/Compare/PWM (CCP) module, an 8-bit timer/counter, and a Watchdog Timer with its own on-chip RC oscillator for reliable recovery. Programmable code protection and an ICD-friendly in-circuit debug option simplify field updates and brown-out protection preserves memory integrity during power events. Architecturally, the PIC16LC620 separates program and data buses (Harvard), uses a 14-bit instruction word for compact code density, and offers two hardware stack levels for subroutine nesting. The LC process node targets ultra-low quiescent current (typically under 1 mA at 5 V/4 MHz), enabling applications where idle power matters more than peak throughput. Typical applications include low-cost remote controls, IR receivers, battery chargers, smoke detectors, fan controllers, small appliance user interfaces, security keypads, and stand-alone sensor signal-conditioning blocks. The 18-PDIP package is well suited to hand-soldered prototypes and educational kits. When designing with this device, place a 100 nF decoupling capacitor as close as possible to VDD/VSS, ensure MCLR is pulled high through a resistor for normal operation, and respect the 4 MHz oscillator ceiling for the '-04' speed grade. The OTP memory requires a device programmer; for prototyping or in-field updates, choose a flash-based PIC16F equivalent in the same 18-pin footprint.

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PIC16LC620-04/SS - 4MHz 8-bit OTP MCU 896B EPROM | Microchip
PIC16LC620-04/SS

PIC16LC620-04/SS - 4MHz 8-bit OTP MCU 896B EPROM | Microchip

The Microchip PIC16LC620-04/SS is a low-power, EPROM-based 8-bit CMOS microcontroller in a 20-pin SSOP (SS) package, part of the PIC16C5x/PIC16LC6xx mid-range family with a 4 MHz oscillator input and 896 bytes of EPROM program memory. It features an 8-bit data path, 80 bytes of RAM, 13 digital I/O pins, and an operating voltage range of 2.5 V to 6.0 V suited for battery and 5 V regulated systems. The LC designator indicates a low-power CMOS variant intended for sleep-mode-friendly consumer and industrial applications where energy budget is critical. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, data memory, peripherals, and I/O on one substrate. The PIC16LC620 family historically sits in the legacy PIC16C/LC mid-range tier, mapping to the broader product hierarchy: microcontroller -> embedded MCU -> semiconductor -> electronic component. The LC sub-family specifically targets low-voltage and low-quiescent-current operation, distinguishing it from standard PIC16C parts that operate on a wider supply range. EPROM-based program memory is one-time-programmable (OTP) and shadow-programmed by Microchip for high-volume customers, offering low unit cost in fully tested, windowed-less packaging. Key features include a 35-instruction RISC instruction set, 2 hardware timer modules, a watchdog timer, and a brown-out/reset circuit for fail-safe operation. The 13 I/O pins support direct LED drive and 5 V tolerant interfacing. The 4 MHz maximum oscillator input translates to a 1 microsecond instruction cycle via the 4-clock-per-instruction PIC core, enabling simple state-machine and timing-control code without external clock multiplication. Programming is performed via Microchip's standard ICSP (In-Circuit Serial Programming) protocol, although the LC620 is supplied factory-programmed when ordered through Microchip Direct. Architecture is a Harvard-class 8-bit RISC core with separate program and data buses, 14-bit wide instruction words, and a two-stage pipeline that executes most instructions in one cycle. The CMOS EPROM cell structure yields low dynamic power dissipation proportional to clock rate, which is why the LC variant is favored in standby-dominant products such as remote controls, sensor front ends, and metering encoders. The internal oscillator and reset architecture eliminate many external components, supporting compact PCB layouts. Typical applications include appliance control boards, low-end remote-control encoders, security keypads, sensor signal conditioning front ends, simple motor control drivers, white-goods user interfaces, and industrial timing/sequencing modules. Industrial temperature grade (and commercial, depending on suffix) supports harsh-environment deployments with long-life product cycles. When selecting this MCU, note that production status is legacy/Obsolete for many LC620 SKUs - confirm lifetime-buy availability on Microchip Direct before design-in, and consider PIC16F648A-I/SS or PIC16F716 drop-in Flash replacements for new designs. The 04 speed suffix denotes 4 MHz max, while the /SS suffix denotes 20-pin SSOP package; verify operating voltage (LC = 2.5-6 V) is compatible with your supply rail. This page synthesizes distributor pricing, drop-in alternatives, and design notes not found in a single manufacturer datasheet, helping engineers evaluate the PIC16LC620-04/SS for legacy maintenance versus migration to Flash-based MCUs.

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PIC16LC620-04E/P - 4MHz 8-Bit CMOS MCU 896B OTP | Microchip | 18-PDIP
PIC16LC620-04E/P

PIC16LC620-04E/P - 4MHz 8-Bit CMOS MCU 896B OTP | Microchip | 18-PDIP

The Microchip Technology PIC16LC620-04E/P is an EPROM-based 8-bit CMOS RISC microcontroller from the PIC16C family, offering a 4MHz maximum clock speed with 200ns single-cycle instruction execution (except program branches which require two cycles). It integrates 896 bytes (512 x 14) of One-Time Programmable (OTP) program memory, 80 bytes of data RAM, and 13 I/O pins in an 18-pin PDIP package. The device operates from a 2.5V to 6.25V supply and is rated for the automotive extended temperature range. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, working RAM, and peripheral interfaces into one package. Within the broader taxonomy, the PIC16LC620 sits in the 8-bit RISC MCU category (microcontroller -> embedded MCU -> 8-bit MCU -> RISC MCU -> PIC16 family -> EPROM/OTP variant). Its 35-instruction RISC architecture enables compact assembly coding and deterministic real-time control, making the PIC16C family one of the longest-lived 8-bit platforms for embedded control. Key features of the PIC16LC620-04E/P include a two-level deep hardware stack, seven or eight special function hardware registers, and three addressing modes (direct, indirect, and relative). It provides 12 I/O ports, an internal watchdog timer, power-on reset, and a programmable code protection mechanism. The CMOS process delivers low power consumption suitable for battery-connected or always-on control nodes. At the architectural level, the device uses a 14-bit wide instruction word with an 8-bit data path, which is the defining characteristic of the mid-range PIC16 family. This 14-bit ISA gives the PIC16LC620 substantially more code density per instruction than 8-bit MCUs such as the 8051, while remaining simple enough to program in assembly without an external toolchain dependency for short code paths. Typical applications include industrial control logic, appliance control boards, automotive body electronics, simple sensor interfaces, and legacy embedded systems. Its OTP memory suits low-to-mid volume production where field firmware updates are not required and unit cost is a priority over in-system reprogrammability. When designing with this part, verify that the 2.5V-6.25V supply range matches the system rail and that the 4MHz oscillator spec is consistent with required control-loop timing. Migration paths to flash-based PIC16F equivalents should be evaluated for new designs requiring in-circuit reprogrammability. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found on the manufacturer datasheet front page, giving procurement and design engineers a single decision-ready reference for the PIC16LC620-04E/P.

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PIC16LC620-04E/SO - 8-Bit 4MHz OTP MCU 18-SOIC | Microchip
PIC16LC620-04E/SO

PIC16LC620-04E/SO - 8-Bit 4MHz OTP MCU 18-SOIC | Microchip

The Microchip Technology PIC16LC620-04E/SO is an 8-bit RISC microcontroller in the PIC16C family, featuring 896 bytes (512 x 14) of One-Time Programmable (OTP) program memory, 80 bytes of RAM, and 64 bytes of EEPROM data memory, housed in an 18-pin SOIC (0.295 inch / 7.50 mm width) package. It operates at a clock speed of 4 MHz and supports a supply voltage range of 2.5 V to 6.25 V, with 12 I/O ports and a 200 ns single-cycle instruction execution time. What is a PIC 8-bit OTP microcontroller? An OTP (One-Time Programmable) microcontroller is a CMOS device that uses EPROM-based non-volatile program memory, allowing a single factory or production programming cycle. The PIC16C family implements a RISC architecture with only 35 instructions, a two-level deep hardware stack, and direct/indirect/relative addressing. Within the broader semiconductor hierarchy, it sits as: microcontroller -> embedded microcontroller -> CMOS logic IC -> semiconductor. The 'LC' prefix designates a low-power CMOS variant designed for battery-friendly applications. Key features of the PIC16LC620-04E/SO include a 12-bit wide instruction word and 8-bit wide data path, seven or eight special function hardware registers, brown-out detect and power-on reset peripherals, a programmable watchdog timer, and a wide operating voltage range from 2.5 V to 6.25 V. The 'E' suffix denotes the extended automotive temperature range (-40C to +125C), making this part suitable for harsh environment designs. The 4 MHz maximum clock input yields a 200 ns instruction cycle, providing balanced throughput for low-power embedded control. The PIC16LC620 architecture uses a Harvard-style bus with separate program and data paths, enabling deterministic single-cycle execution for most instructions. Program branches are two-cycle. The 4 MHz internal clock rate is generated from an external crystal or RC oscillator, and the device includes power management features such as brown-out reset and power-on reset to improve system reliability. The OTP program memory cannot be erased, which makes this part best suited for production volumes where field firmware updates are not required. Typical applications include automotive body electronics, low-power remote controls, sensor signal conditioning, simple appliance controls, and industrial automation subsystems. The extended temperature grade and low-power CMOS design make it ideal for automotive under-hood or cabin modules operating across wide thermal ranges. It is also frequently used in legacy PIC-based designs that have been qualified and certified over many production cycles. When designing with this device, note that OTP memory cannot be re-programmed - use the PIC16F or PIC16LF flash variants if in-field firmware updates are required. Always include decoupling capacitors (0.1 uF ceramic) near the VDD pin, and ensure the MCLR pin is properly biased for reliable reset behavior. This page synthesizes distributor stock levels, drop-in alternative MPNs, and design notes not consolidated in any single manufacturer datasheet.

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