Circuitos integrados

PIC17LC766-08I/L

PIC17LC766-08I/L - 8-Bit 8MHz 32KB OTP MCU | Microchip | 84-PLCC

The Microchip Technology PIC17LC766-08I/L is a high-performance 8-bit CMOS EPROM microcontroller from the PIC17 family, delivering 8 MIPS throughput from a 33 MHz clock input with a 121 ns instruction cycle. It integrates 32 KB (16K x 16) of One-Time-Programmable (OTP) program memory, 902 bytes of RAM, and 66 digital I/O pins in a square 84-pin PLCC package (29.31 x 29.31 mm). An 8-bit microcontroller (MCU) is a programmable processor built around an 8-bit data bus, combining CPU, RAM, non-volatile program memory, and peripherals on a single die. PIC17C-series parts sit at the top of Microchip's 8-bit hierarchy (PIC10/12/16/17/18), pairing a RISC instruction set with a 16-bit-wide program word to maximize code density and execution speed. Key features of the PIC17LC766 include a built-in 10-bit A/D converter, a single-cycle 8x8 hardware multiplier, two-cycle branch and table-read/write operations, an industrial operating temperature range (-40C to +85C), and an LC (low-power CMOS) core designed for 2.5V to 5.5V operation. The 'L' suffix denotes the 84-pin PLCC J-lead surface-mount package, and 'I' marks the industrial temperature grade. The architecture combines a Harvard bus (separate program and data paths) with a 16-bit instruction word and 58 single-word instructions, simplifying code development while delivering predictable real-time performance. The 8x8 hardware multiplier and 16-level hardware stack accelerate math-intensive and interrupt-driven control loops. Typical applications include industrial control systems, motor control front-ends, instrumentation with on-chip A/D, embedded data acquisition, and legacy equipment retrofits. Designers select the PIC17LC766 when 8-bit simplicity, OTP memory, and high I/O count are required. When designing in this MCU, note that OTP memory cannot be re-programmed in-circuit; use the JW (windowed) or QFP variants for prototyping. The 84-pin PLCC requires a socket or reflow profile suited to J-leaded SMT packages. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, giving engineers a single reference for sourcing PIC17LC766-08I/L.

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PIC17LC766-08I/PT

PIC17LC766-08I/PT - 8-Bit 8MHz 32KB OTP MCU | Microchip

The Microchip Technology PIC17LC766-08I/PT is a high-performance 8-bit CMOS EPROM-based microcontroller (MCU) from the PIC17C family, integrating 32KB (16K x 16) of One-Time-Programmable (OTP) program memory with 902 bytes of RAM and 66 digital I/O lines in an 80-pin TQFP (12x12 mm) package. The device runs up to an 8 MHz external clock with a single-cycle instruction execution of 121 ns and operates from a 2.5 V to 5.5 V supply, with an instruction set of only 58 single-word instructions including a single-cycle hardware multiplier. An 8-bit microcontroller (MCU) is a programmable processor that uses an internal 8-bit data bus and combines a CPU, non-volatile program memory, RAM, and peripherals on a single die. Within the broader taxonomy, the PIC17C766 sits in the high-performance tier of Microchip's 8-bit PIC family, above the mid-range PIC16 line and below the enhanced PIC18 line; the full hierarchy is 8-bit MCU -> microcontroller -> embedded processor -> semiconductor. Its RISC architecture, hardware multiply and 33 MHz clock-input capability make it one of the most capable 8-bit controllers Microchip has shipped, optimized for control loops and real-time processing. Key features include 10-bit A/D conversion channels for mixed-signal sensing, multiple counter/timer peripherals, a hardware USART, PWM modules, and on-chip EEPROM emulation through the OTP array. The "LC" suffix designates the low-voltage CMOS variant, allowing operation down to 2.5 V for battery-powered designs. The industrial ("I") temperature grade supports -40C to +85C operation. Typical applications include industrial automation and motor control, robotics, HVAC controllers, automotive body and chassis subsystems (where automotive-grade parts are not required), and embedded data-acquisition front ends. The wide digital I/O count (66 pins) and large memory make the device well suited to complex state-machine-driven control panels and user-interface controllers that exceed the capability of mid-range 8-bit MCUs. When designing with this device, note that the OTP memory variant cannot be reprogrammed in-circuit; a windowed CERDIP version exists for prototyping. The Microchip datasheet recommends PIC18F8520 as the newer migration path for new designs that need flash memory and faster execution. Ensure the trace impedance and decoupling layout follow Microchip's reference design for 8-bit PIC controllers running above 4 MHz.

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PIC17LC766T-08/L

PIC17LC766T-08/L - 8-bit CMOS MCU, 8MHz, 32KB EPROM, CDIP-40

The Microchip Technology PIC17LC766T-08/L is a high-performance 8-bit RISC CMOS EPROM microcontroller featuring a 16-bit data bus architecture and 8 MHz maximum clock speed, housed in a 40-pin Plastic DIP (CDIP-40) package. The part integrates 32 KB of one-time-programmable (OTP) EPROM program memory and offers 33 digital I/O ports across its 84-pin package code (QCCJ). A microcontroller (MCU) is a single-chip computer containing a processor core, program memory, working RAM, and programmable I/O peripherals. The PIC17Cxx family represents Microchip's high-tier 8-bit architecture, positioned between the baseline PIC16 family and the 16-bit dsPIC/PIC24 families in the PICmicro hierarchy. The 'LC' suffix denotes a low-voltage CMOS variant (2.5V to 5V operation) suitable for battery-powered and energy-conscious designs where the higher-voltage PIC17C parts would be unsuitable. Key features include a RISC instruction set with only 58 single-word instructions, single-cycle execution at 121 ns (except for program branches and table reads/writes which are two-cycle), a built-in 10-bit A/D converter, and a commercial operating temperature grade. The architecture provides 16-bit-wide instructions and an 8-bit data path, with hardware multiplier support for efficient arithmetic operations. The PIC17LC766 architecture combines Harvard bus separation with a deep instruction pipeline, achieving throughput of up to 8 MIPS at 8 MHz. The OTP EPROM allows factory or prototype programming while supporting field re-programming during development, with on-chip peripherals including timers, USART, and capture/compare/PWM modules typical of the PIC17 family. Typical applications include industrial control systems, instrumentation, motor control interfaces, and embedded communication controllers where moderate code density (32 KB) and a robust 8-bit architecture with extensive I/O are required. The wide 2.5V to 5V supply range allows direct connection to 3.3V or 5V system buses. When designing with this device, ensure external oscillator stability and adequate decoupling on VDD pins. For new designs, consider migrating to the pin-compatible PIC18 family for greater code density and modern peripherals, while preserving the existing toolchain investment. This page synthesizes current distributor pricing, lifecycle status, drop-in PIC17 family alternatives, and practical design notes not found on the Microchip datasheet alone.

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PIC17LC766T-08/PT

PIC17LC766T-08/PT - 8-bit PIC MCU, 32KB OTP, 80-TQFP | Microchip

The Microchip Technology PIC17LC766T-08/PT is an 8-bit RISC microcontroller featuring 32KB of One-Time Programmable (OTP) program memory and 902 bytes of RAM, housed in an 80-pin TQFP (Thin Quad Flat Pack) surface-mount package. It belongs to the PIC17C family of high-performance 8-bit microcontrollers, executing 58 single-word instructions with a 121 ns single-cycle execution time at 33 MHz clock input. A microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, data memory, and peripheral interfaces (timers, ADC, I/O, communication ports) on one die. Microcontrollers sit at the core of embedded systems as the lowest-tier processor family, below microprocessors and DSPs in computational complexity but unmatched in cost-effectiveness for deterministic control tasks. The PIC17C family represents one of Microchip's highest-end 8-bit families, intended for applications requiring maximum code density and peripheral integration from the 8-bit portfolio. Key features include 66 digital I/O pins, multiple timer modules, a 12-bit (or 10-bit, family-typical) ADC, USART, and dual-capture/compare/PWM modules. The 80-pin TQFP package exposes the full peripheral set of the family for complex embedded designs. The OTP memory type means the program is written once at production time, suiting high-volume cost-sensitive applications rather than field updates. Architecturally, the PIC17LC766T uses a 16-bit program word with an 8-bit data path, an enhanced Harvard architecture with separate program and data buses for simultaneous fetch and access. The "LC" suffix denotes the low-voltage CMOS variant supporting 3.0V to 5.5V operation, with 8 MHz maximum operating frequency (the "-08" speed suffix) suitable for battery-powered and mixed-voltage designs. Typical applications include industrial control panels, sensor signal conditioning nodes, motor control peripherals, point-of-sale terminals, and automotive body/comfort modules. The wide I/O count supports keypad scanning, multi-segment LED/LCD driving, and parallel sensor aggregation in instrumentation. When designing with this part, note that OTP memory requires a device programmer at production time and cannot be updated in the field. For development, Microchip offers windowed (UV-erasable) and flash variants in the same family — designers typically prototype on flash and migrate to OTP for volume.

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PIC17LC766T-08I/L

PIC17LC766T-08I/L - 8-Bit 8MHz 32KB OTP MCU 84-PLCC | Microchip

The Microchip Technology PIC17LC766T-08I/L is an 8-bit microcontroller from the PIC17C family, providing 32KB (16K x 16) of One-Time Programmable (OTP) program memory, 902 bytes of RAM, and 33 digital I/O lines, housed in a surface-mount 84-pin PLCC (Plastic Leaded Chip Carrier) package measuring 29.31 mm x 29.31 mm. Operating at 8 MHz with a 121 ns instruction cycle (except for two-cycle branches and table reads/writes), the device executes 58 single-word instructions and is targeted at high-performance 8-bit embedded applications. An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data path, an ALU, on-chip program and data memory, and a set of peripherals. Within the embedded hierarchy, an 8-bit MCU sits below 16-bit and 32-bit MCUs in computational throughput but above discrete logic in integration; it remains the lowest-cost solution for deterministic control loops, sensor interfacing, and human-machine interface tasks. The PIC17C family is Microchip's high-end 8-bit line, bridging to the PIC18 architecture that succeeded it. Key features include a wide 2.5 V to 5.5 V supply-voltage range supporting both 3.3 V and 5 V designs, an internal 8 MHz oscillator option, brown-out reset and power-on reset, a 16-bit data bus, an 8-level hardware stack, and capture/compare/PWM peripherals. The OTP program memory enables one-time programming during manufacturing, which lowers per-unit cost versus windowed or flash parts while remaining ideal for high-volume production runs. The PIC17C core uses a RISC-style Harvard architecture with separate program and data buses, allowing instruction fetch and operand access in a single cycle for most opcodes. The 16-bit instruction word packs an opcode plus a literal or address field, which is more efficient than 14-bit PIC16 cores at the cost of slightly larger program memory. The 84-pin PLCC package gives access to the full peripheral set, including the parallel slave port, USART, and multiple timer modules. Typical applications include industrial automation controllers, motor-drive front-ends, automotive body and chassis ECUs, consumer electronics user interfaces, and embedded data-acquisition front-ends. The combination of 32 KB of code space, 33 I/O pins, and an industrial -40 C to +85 C temperature range makes the part well suited to mid-complexity control tasks where higher-bit MCUs are unnecessary. When designing with this device, ensure the OTP programming step is incorporated into the production flow because OTP parts cannot be erased or re-programmed after the programming pulse. Use the PLCC socket footprint for prototype builds so the die can be inspected, and verify that the legacy PIC17C toolchain (MPASM assembler, ICD in-circuit debugger) is available in your build environment, as this family predates the MPLAB X mainstream ecosystem. This page synthesizes distributor pricing, drop-in 84-PLCC PIC17C family alternatives, and practical design notes that are not collated in any single manufacturer document.

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PIC17LC766T-08I/PT

PIC17LC766T-08I/PT - 8-Bit 8MHz 32KB OTP MCU | Microchip

The Microchip Technology PIC17LC766T-08I/PT is an 8-bit PIC17C-family microcontroller built around an enhanced RISC architecture and housed in an 80-pin TQFP (12x12 mm) surface-mount package supplied on tape and reel. It combines an 8 MHz clock speed, 32 KB (16K x 16) of One-Time Programmable (OTP) program memory, and 902 bytes of RAM in a single CMOS die. The device operates across an industrial temperature range of -40°C to +85°C from a 3.0 V to 5.5 V supply, supporting both 3.3 V and 5 V system rails. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, working RAM, and programmable peripherals. The PIC17C family sits at the high end of Microchip's classic 8-bit portfolio, pairing RISC instruction-set efficiency with 16-bit-wide program memory to deliver compact code density and deterministic execution. PIC17C MCUs are typically deployed in industrial control, instrumentation, and embedded designs that demand more compute, memory, and I/O than entry-level PIC16 devices can provide. Key features of the PIC17LC766T-08I/PT include 33 digital I/O lines, an 8 MHz oscillator yielding 121 ns single-cycle instruction execution, 58 single-word instructions, hardware multipliers, multiple timer/counter modules, and a synchronous serial port. The OTP program memory supports one-time field programming, while the TQFP-80 footprint exposes the full peripheral set including external interrupt, capture/compare/PWM, and USART interfaces. The wide 3.0–5.5 V supply tolerance simplifies mixed-voltage system design. Architecturally, the PIC17C766 core is a Harvard-style design with separated program and data buses, an 8-level hardware stack, and direct interrupt handling. The OTP program array is 16 bits wide, which doubles code density relative to 14-bit PIC16 devices. Operating at 8 MHz, most instructions complete in a single 121 ns cycle; program branches and table reads/writes require two cycles. This deterministic timing makes the PIC17LC766T-08I/PT well suited to real-time control loops where predictable latency matters more than raw throughput. Typical applications include industrial automation controllers, instrumentation front-ends, motor control peripherals, embedded sensor hubs, white-goods control boards, and legacy 5 V factory equipment retrofits. The 32 KB OTP allows substantial application logic, state machines, and protocol stacks to be stored on-chip. When designing with this part, note that OTP memory cannot be re-programmed, so choose this variant for production; consider the JW (windowed) or QTP/SQTP equivalents for prototyping. The TQFP-80 footprint requires careful PCB thermal and signal-integrity planning for the high-pin-count interface. This page consolidates distributor pricing, pin-compatible alternatives, application guidance, and design notes not found in the manufacturer datasheet alone.

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PIC18C242-E/SP

PIC18C242-E/SP - 8-Bit PIC MCU, 16KB OTP, 28-Pin SPDIP | Microchip

The Microchip PIC18C242-E/SP is an 8-bit RISC microcontroller with 16KB of one-time-programmable (OTP) program memory, 512 bytes of RAM, and 23 digital I/O lines, packaged in a 28-pin SPDIP (Skinny Plastic DIP) through-hole tube. Operating from a 5V supply, the part is rated for the -40C to +125C extended automotive temperature range, as denoted by the "E" temperature suffix in the part number. What is a PIC18C-series microcontroller? The PIC18C family is Microchip's OTP-programmed extension of the PIC18 architecture, providing 10 MIPS throughput (100 ns instruction execution), 77 single-word instructions, and source-code compatibility with the PIC16C5X, PIC12CXXX, PIC16CXX, and PIC17CXX device families. PIC18C devices integrate a high-performance RISC engine, peripherals such as 10-bit A/D converters, PWM modules, USART, and synchronous serial ports, making them a versatile 8-bit platform for embedded control designs that benefit from low unit cost and abundant peripheral integration. Key features of the PIC18C242-E/SP include 16KB OTP program memory, 512 bytes of data RAM, a 10-bit analog-to-digital converter (ADC) module, a Universal Synchronous/Asynchronous Receiver-Transmitter (USART), an MSSP (Master Synchronous Serial Port) supporting SPI and I2C, capture/compare/PWM modules, and 23 I/O pins across four ports (PORTA-PORTC plus partial PORTD-equivalent functions on PORTC). The device executes instructions at 10 MIPS from a 40 MHz oscillator, providing ample headroom for real-time control loops. Architecturally, the PIC18C242 uses a 16-bit instruction word with an 8-bit data path and a hardware multiplier, enabling efficient C code generation. The ADC module supports five input channels in the 28-pin package and integrates sample-and-hold, allowing direct interfacing with analog sensors without external signal conditioning. Typical applications include industrial control modules, automotive body controllers, sensor signal conditioning, motor control low-end loops, appliance control boards, and general-purpose 8-bit embedded systems. The extended -40C to +125C temperature grade and OTP programmability make it particularly suited to high-volume automotive and industrial deployments. When designing with this part, verify the OTP memory constraint: code is programmed once and cannot be erased, so production code must be fully validated on flash-equipped PIC18F siblings (e.g., PIC18F242) before final OTP programming. Decoupling capacitors (100 nF and 10 uF bulk) must be placed within 5 mm of the VDD/VSS pins, and the MCLR reset line should be pulled high through a 10 kohm resistor. This page synthesizes distributor availability, parametric specifications, drop-in replacement candidates, and engineering design guidance not collated on any single distributor page.

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PIC18C242-I/SO

PIC18C242-I/SO - 8-bit 40MHz OTP MCU, 16KB, 28-SOIC | Microchip

The Microchip Technology PIC18C242-I/SO is an 8-bit CMOS OTP-based microcontroller in the PIC18C family, delivering 10 MIPS performance (100 ns instruction execution) in a 28-pin SOIC wide-body package. Key headline parameters are 16 KB (8K x 16) of program memory, 512 bytes of data RAM, 23 digital I/O pins, and a 40 MHz (10 MIPS) maximum operating frequency, with a 10-bit multi-channel analog-to-digital converter (ADC) on chip. The I/SO suffix denotes the industrial temperature grade (-40C to +85C) and the SOIC-28 wide-body package. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory (Flash/ROM/OTP), volatile working RAM, peripheral blocks (ADC, timers, UART, SPI, I2C), and general-purpose I/O into one package. Within the broader taxonomy, an MCU sits inside the semiconductor -> integrated circuit -> microcontroller -> 8-bit microcontroller hierarchy. The PIC18C family adds enhanced 16-bit-wide instructions, a hardware multiplier, and C-friendly architecture to the classic PIC baseline, making it a stepping stone to the later PIC18F Flash-based parts. Program memory is One-Time Programmable (OTP), meaning each unit can be programmed once but cannot be electrically erased; this is suitable for low-volume production, educational use, and end products that do not need firmware updates. Key features include 16 KB OTP program memory, 512 B SRAM, 23 I/O, a 10-bit 5-channel ADC, a USART, an SSP (SPI/I2C) module, two 8-bit timers plus one 16-bit timer, and an internal/external oscillator block. The wide 28-SOIC footprint simplifies hand-soldering and breadboard prototyping compared to surface-mount-only packages. The architecture offers 77 single-word instructions, a hardware 8x8 multiplier, and 16-bit instructions that improve C code density, while the 10-bit ADC supports up to 5 analog inputs on the 28-pin device. Typical applications include industrial control loops, motor drive signal conditioning, sensor interfacing with on-chip ADC, embedded educational platforms, low-volume OEM controllers, and legacy product refresh designs where the proven PIC18C instruction set and toolchain are retained. Because the PIC18C line has been superseded by the PIC18F family (notably the recommended PIC18F242), designers should weigh future firmware-iteration needs and supply availability before committing to OTP memory.

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PIC18C242-I/SP

PIC18C242-I/SP - 8-Bit 40MHz 16KB OTP MCU | Microchip

The Microchip PIC18C242-I/SP is an 8-bit RISC CMOS microcontroller based on the PIC18 architecture, packaged in a 28-pin SPDIP (0.300 inch, 7.62 mm). It operates at a maximum clock frequency of 40 MHz, executing instructions at 10 MIPS (100 ns per instruction), and integrates 16 KB of one-time-programmable (OTP) program memory organized as 8K x 16 words plus 512 bytes of data RAM. The device is part of the legacy PIC18C OTP family that was superseded by the flash-based PIC18F series, and Microchip explicitly recommends PIC18F242 as the modern functional replacement for new designs. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, data memory, and peripherals such as timers, A/D converters, and communication interfaces onto one die. The PIC18 family is the high-performance tier of Microchip's 8-bit PIC architecture, offering an enhanced instruction set of 77 single-word instructions with C-friendly orthogonality, upward compatibility with PIC16 and PIC17 code, and hardware multipliers not present on the PIC16 baseline. PIC18C devices use OTP EPROM for program storage, making them one-time-programmable parts suitable for mature production runs, while PIC18F successors migrated to flash memory for in-system re-programmability. Key features of the PIC18C242 include five 10-bit A/D converter input channels (the 28-pin members of the family have a reduced A/D channel count compared to the 40-pin PIC18C442/452), an Addressable USART (AUSART) for serial communications, a Master Synchronous Serial Port (MSSP) supporting SPI and I2C, multiple timers, and parallel I/O. The wide operating voltage range typically spans 2.0 V to 5.5 V, with the industrial (-I) temperature grade covering -40 C to +85 C. Architecturally, the PIC18C242 uses a Harvard memory layout with separate program and data buses, a 16-bit instruction word, and a 31-level deep hardware stack. The OTP cell enables a robust monolithic CMOS process, but at the cost of non-volatility being physically locked after programming, which contrasts with flash-based PIC18F devices that can be re-programmed thousands of times. Typical applications include industrial control nodes, motor control signal conditioning, instrumentation front-ends, and embedded sensor interfaces where a deterministic 8-bit core and simple peripheral mix are sufficient. Designers should consider PIC18F242, PIC18F2520, or PIC18F2525 as modern pin-compatible flash alternatives for new designs requiring in-field firmware updates. When selecting this part, verify the OTP-only constraint of the PIC18C family against the production programming flow: once programmed, parts cannot be re-flashed, so engineering builds must be performed on the PIC18F equivalent during development. A 28-pin SPDIP footprint allows easy breadboard prototyping and through-hole assembly.

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PIC18C242/JW

PIC18C242/JW - 40MHz 8-Bit MCU, 16KB EPROM, 28-CerDIP Window | Microchip

The Microchip Technology PIC18C242/JW is an 8-bit RISC microcontroller from the PIC® 18C family, featuring 16KB (8K x 16) of UV-erasable EPROM program memory and operating at up to 40MHz in a 28-pin ceramic DIP (CerDIP) windowed through-hole package. The 'JW' suffix denotes the quartz windowed ceramic package that allows UV erasure for development, prototyping, and reprogramming cycles, distinguishing it from the OTP (One-Time-Programmable) 'P' variants. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, data RAM, and peripherals on one die. The PIC18C architecture belongs to the enhanced mid-range family, sitting above the PIC16 baseline and below the dsPIC/PIC24 16-bit families in Microchip's taxonomy: 8-bit MCU -> RISC microcontroller -> embedded controller -> semiconductor. The PIC18C core uses a Harvard architecture with separate program and data buses, an 8-bit data path, and a 16-bit instruction word. This dual-bus design lets the CPU fetch instructions while reading/writing data in the same clock cycle, yielding the 40MHz (10 MIPS) throughput. Key features include 16KB EPROM program memory, 768 bytes of data RAM, a 5-channel 8-bit ADC, synchronous/asynchronous serial ports (USART), MSSP for SPI/I2C, capture/compare/PWM modules, and 23 digital I/O pins. The windowed CerDIP package supports development via UV erasure (~20 minutes under 254nm UV lamp). Typical applications include embedded control systems, sensor interfaces, motor control, industrial automation, and legacy product maintenance where windowed parts enable field re-programming. The through-hole 28-CDIP form factor suits breadboard prototypes, educational platforms, and aerospace/defense legacy sustainment programs. When designing with this part, note that the PIC18C series has been superseded by the flash-based PIC18F family (e.g., PIC18F242). The windowed JW variant is generally used only for development; production designs should migrate to PIC18F or PIC18F-Q1 equivalents. Always verify the silicon revision against the datasheet errata before reuse.

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PIC18C242T-E/SO

PIC18C242T-E/SO - 8-bit 40MHz PIC MCU 16KB OTP SOIC-28 | Microchip

The Microchip Technology PIC18C242T-E/SO is an 8-bit PIC18C-series microcontroller operating up to 40 MHz with 16 KB (8K x 16) of One-Time Programmable (OTP) program memory and 512 bytes of RAM, housed in a 28-pin SOIC wide-body (7.50 mm) package. It supports the PIC18 instruction set with 16-bit wide instructions and an 8-bit wide data path, and operates from a 5 V supply within an extended -40C to +125C temperature range per the "E" (Extended) part suffix. An 8-bit microcontroller is a small single-chip computer that integrates a CPU, program memory, RAM, peripherals (timers, A/D, communication ports), and I/O on a single die. Within the taxonomy, PIC18C242 belongs to Microcontroller -> Embedded Controller -> Integrated Circuit -> Semiconductor. The PIC18 family uses a RISC Harvard architecture with separate program and data buses, enabling single-cycle instruction execution except for branch instructions that take two cycles. Key features include 16 KB OTP program memory (8K x 16), 512 bytes of data RAM, eight priority levels for interrupts, a single-cycle hardware multiplier, and 10 MIPS peak throughput when driven by a 40 MHz oscillator. The 28-pin SOIC variant omits the Parallel Slave Port and reduces A/D input channels to 5 compared to 40-pin package variants. Technical depth: The PIC18C242 combines a 16-bit instruction word for compact code density with an 8-bit data path, allowing efficient C compiler code generation while keeping peripheral registers byte-addressable. The single-cycle hardware 8x8 multiplier accelerates DSP routines such as FIR filters or closed-loop control math, while prioritized interrupts reduce latency for time-critical events. Typical applications include industrial control (sensor interfaces, motor control subsystems), automotive body electronics and instrumentation, consumer appliance control boards, and embedded data acquisition front-ends. The extended temperature range makes it suitable for harsh-environment nodes. When designing with this part, remember that OTP memory cannot be re-programmed - use it on production-intent boards where code is final, or evaluate Flash-based PIC18F242 alternatives such as the PIC18F2420 for prototyping. Decoupling VDD with a 0.1 uF ceramic capacitor placed within 5 mm of the supply pin is essential. This page synthesizes distributor pricing, drop-in alternatives, and engineering design notes not found in the standalone Microchip datasheet.

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PIC18C252-E/SO

PIC18C252-E/SO - 32KB OTP 8-bit MCU, 10 MIPS, 28-SOIC | Microchip

The Microchip PIC18C252-E/SO is a high-performance 8-bit RISC microcontroller with 32 KB (16K x 16) of One-Time-Programmable (OTP) program memory, 1.5 KB of RAM, and a maximum CPU throughput of 10 MIPS (100 ns instruction execution), housed in a 28-pin SOIC (7.50 mm body) package rated for the extended -40C to +125C temperature range. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, data RAM, peripherals, and I/O on a single die. Within the PIC architecture hierarchy, the PIC18C family is the OTP-based, 5V legacy branch, sitting alongside the PIC16 mid-range and PIC17 high-performance lines, and is itself upward compatible with PIC16C5X, PIC12CXXX, PIC16CXX, and PIC17CXX devices, providing a seamless migration path to the flash-based PIC18F generation. The PIC18C252 features a Harvard RISC architecture with 77 single-word instructions, 16-bit wide instructions, an 8-bit wide data path, a single-cycle hardware 8x8 multiplier, and a linear data memory space of up to 4 KB. Peripherals include a 10-bit ADC with up to 5 channels, two Capture/Compare/PWM (CCP) modules, USART, MSSP (SPI/I2C), 22 digital I/O pins, and two 8-bit / three 16-bit timers, with separate priority levels for interrupts and an 8x8 hardware multiply that executes in one cycle. Performance is anchored by a 40 MHz maximum external oscillator (DC to 40 MHz primary; 4 MHz to 10 MHz when the PLL is active), giving the 10 MIPS throughput and 100 ns instruction cycle time. The CMOS process and OTP program memory target cost-sensitive high-volume embedded designs where flash reprogramming is not required and the extended -40C to +125C operating range is mandatory. Typical applications include industrial control nodes, automotive body and instrument cluster subsystems, motor-control signal conditioning, sensor interfacing, and legacy PIC16/17 system upgrades that need extra program memory or I/O. New designs should evaluate the recommended Microchip PIC18F252 successor for flash-based reprogrammability, in-circuit debugging, and longer product lifecycle support. When laying out the PCB, place decoupling capacitors (typically 0.1 uF) within 5 mm of VDD/VSS, route MCLR through the recommended RC network with a dioded pull-up, and respect the 28-pin SOIC land pattern exactly - the -E/SO extended-temperature SOIC footprint is the same as the -I/SO industrial part, allowing PCB reuse.

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PIC18C252-E/SP

PIC18C252-E/SP - 8-bit MCU, 32KB OTP, 10 MIPS | Microchip

The Microchip Technology PIC18C252-E/SP is an 8-bit CMOS OTP-based RISC microcontroller built on the PIC18 architecture, delivering up to 10 MIPS of processing power (100 ns instruction execution) in a 28-pin SPDIP through-hole package. Key headline parameters are 32 KB of one-time-programmable (OTP) program memory organized as 16K x 16, 1.5 KB of RAM, 22 I/O pins, a 10-bit ADC, and an extended industrial operating temperature range of -40C to +125C. It operates from a 5 V supply and supports external oscillator frequencies up to 40 MHz. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory (ROM/Flash/OTP), data memory (RAM), peripherals, and I/O on one die. PIC18-series MCUs belong to the RISC (Reduced Instruction Set Computer) family, where a small, fixed-length instruction set allows most operations to complete in one instruction cycle. The PIC18C252-E/SP is one of the older OTP-programmable members of the PIC18C family, which has since been largely superseded by the flash-based PIC18F family (Microchip itself recommends migrating to PIC18F252). Key differentiating features include an enhanced 16-bit instruction word with an 8-bit data path, 77 single-word instructions, priority-level interrupts, linear data memory addressing up to 4 Kbytes, and a Capture/Compare/PWM (CCP) module. The 28-pin SPDIP package is the same footprint used across most PIC18C/F mid-range parts, simplifying prototype and production migration. On-chip peripherals include timers, a USART, an MSSP (SPI/I2C), and a 10-bit ADC with up to 5 analog input channels on the 28-pin variant. Typical applications for this part include industrial automation controllers, automotive body and chassis subsystems, consumer appliance controls, low-cost sensor front ends, and legacy embedded designs that require a drop-in OTP solution. The 32 KB program memory is well-suited to mid-complexity firmware stacks such as small RTOS implementations, motor control state machines, and multi-protocol bridging code. Design consideration: because this part uses OTP memory, firmware must be mask-programmed or programmed once at production and cannot be field-updated. For new designs or designs requiring firmware revision flexibility, Microchip recommends migrating to the flash-based PIC18F252. Be aware that the older PIC18C silicon carries silicon errata on the CCP module when used in Compare toggle mode - see the datasheet errata sheet before committing the design. This page synthesizes distributor pricing, drop-in Microchip PIC18 same-family alternatives, and practical design notes that complement the Microchip datasheet rather than restating it.

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PIC18C252-I/SP

PIC18C252-I/SP - 8-bit OTP MCU 32KB Flash 40MHz | Microchip

The Microchip Technology PIC18C252-I/SP is a high-performance 8-bit CMOS One-Time Programmable (OTP) microcontroller from the PIC18C family, delivering 10 MIPS at 40 MHz with only 77 single-word instructions. Housed in a 28-pin SPDIP (SP) through-hole package, the device integrates 32 KB of OTP program memory (16K x 16 words), 1.5 KB of data RAM, and 23 digital I/O pins. According to the Microchip product page, the manufacturer actively recommends designers consider the flash-based PIC18F252 as a newer alternative for new designs, indicating the PIC18C252 is positioned in mature legacy sockets. A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory, RAM, and peripheral interfaces. The PIC18 family sits within the larger PIC RISC architecture hierarchy: PIC18C -> enhanced 8-bit PIC -> 8-bit PIC microcontroller -> microcontroller -> embedded semiconductor. PIC18C devices specifically combine Harvard architecture, 16-bit-wide instructions, and C-optimized peripheral sets, making them a step above baseline PIC16 parts in both performance and addressable memory. Key features of the PIC18C252-I/SP include an integrated 10-bit Analog-to-Digital Converter (ADC) with multiple input channels, three timer modules, a Capture/Compare/PWM (CCP) module, and hardware serial interfaces including I2C, SPI, and USART. The wide 2.0V to 5.5V operating range and industrial -40C to +85C temperature grade suit both battery-powered and industrial environments. The OTP program memory allows one-time field programming, useful for low-cost production units where firmware changes are not anticipated. The device implements the PIC18 instruction set with 16-bit opcodes and an 8-bit data path, supporting linear program memory addressing up to 32 KB and a banked RAM architecture. A hardware multiplier and 31-level deep stack support C compilers and interrupt-driven designs. Brown-out Reset (BOR), Watchdog Timer (WDT), and In-Circuit Serial Programming (ICSP) are integrated. Typical applications include industrial control subsystems, appliance controllers, automotive body electronics, sensor signal conditioning with on-chip ADC, and low-cost consumer devices. The SPDIP-28 footprint is breadboard-friendly for prototyping and field-replaceable designs. Design tip: because the PIC18C252-I/SP is OTP-based, plan firmware carefully - any code revision requires a new part. For iterative development or field updates, migrate to the flash-based PIC18F252 in the same SPDIP-28 pinout. This page synthesizes Microchip distributor pricing, parametric comparison vs flash-based PIC18F alternatives, and practical design notes beyond the manufacturer datasheet, with content tailored for engineers maintaining legacy systems.

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PIC18C252/JW

PIC18C252/JW - 8-Bit 40MHz 32KB EPROM 28-CerDip MCU | Microchip

The Microchip Technology PIC18C252/JW is an 8-bit PIC18-family CMOS microcontroller with 32KB (16K x 16) of UV-erasable EPROM program memory and 1.5KB of RAM, packaged in a 28-pin windowed ceramic DIP (CerDIP) for in-circuit prototype development and field-reprogrammable applications. It executes instructions at up to 10 MIPS from a 40 MHz oscillator input, with 100 ns minimum instruction cycle, and integrates on-chip peripherals including Brown-out Detect/Reset, Low-Voltage Detect, Power-on Reset, PWM modules, and a Watchdog Timer. An 8-bit microcontroller (MCU) is a single-chip computer built around a CPU core, program memory, data RAM, and integrated peripherals such as timers, ADC, communication ports, and I/O. PIC18-family MCUs belong to Microchip's enhanced mid-range 8-bit RISC architecture, which sits hierarchically between the legacy PIC16 mid-range and the PIC17 high-end series, and forms the foundation of Microchip's PIC architecture (micros, microcontrollers, semiconductors, integrated circuits). The /JW suffix denotes a windowed ceramic package that allows UV erasure of the EPROM array for repeated development cycles - a hallmark of legacy OTP-based PIC18C devices. Key features include a C-compiler-optimized RISC architecture with only 77 single-word instructions, source-code compatibility with PIC16CXX devices, a hardware single-cycle 8x8 multiplier, eight-level priority interrupt controller, and dual 16-bit Capture/Compare/PWM modules. The 28-pin windowed CerDIP is rated for the commercial 0C to +70C range and supports 23 digital I/O lines for user application interfaces. Typical applications include embedded control prototypes, industrial automation controllers, instrumentation front-ends, motor control loops, and educational development platforms where UV-erasable program memory accelerates firmware iteration. The windowed package is also preferred for low-volume production runs and field firmware updates via UV erasure. When designing with this part, verify that in-circuit socketing accommodates the 0.600-inch wide CerDIP body and the quartz window. Migration to the pin-compatible flash-based PIC18F252 is recommended for new designs because OTP/EPROM devices are NRND - the silicon is mature and Microchip explicitly recommends PIC18F252 as the modern replacement. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the standalone manufacturer datasheet.

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PIC18C252T-E/SO

PIC18C252T-E/SO - 8-Bit 40MHz OTP MCU, 32KB, 28-SOIC | Microchip

The Microchip Technology PIC18C252T-E/SO is an 8-bit PIC18C-series RISC microcontroller built on a CMOS OTP process, delivering 10 MIPS throughput at 40 MHz and packaged in a 28-pin SOIC (SO, 0.295 inch / 7.50 mm body width) for surface-mount tape-and-reel assembly. It integrates 32 KB of OTP program memory (16K x 16 words) and 1.5 KB of on-chip RAM, plus a 10-bit A/D converter, making it a member of the PIC18C high-performance microcontroller family that also includes the PIC18C242 (28-pin), PIC18C442 (40-pin) and PIC18C452 (40-pin) variants. An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data path, typically offering low cost, deterministic interrupt response and rich peripheral integration. Within the broader taxonomy, the PIC18C252 belongs to the microcontroller class of microcontrollers, itself a sub-category of microcontrollers, which in turn sit under embedded computing and semiconductors. The PIC18C architecture specifically targets applications that need more code space, more RAM and higher throughput than legacy PIC16 designs while retaining the standard PIC instruction-set compatibility and the familiar PIC toolchain (MPLAB IDE, MPASM, PIC C compilers). Key features of the PIC18C252T-E/SO include 10-bit A/D conversion with multiple input channels, 77 single-word instructions (most single-cycle at 40 MHz), an internal oscillator option on selected family members, hardware USART, MSSP (SPI/I2C), capture/compare/PWM modules, and a wide 2.0 V to 5.5 V operating range. The 'T' suffix indicates Tape and Reel packaging, the 'E' indicates the Extended temperature grade (-40C to +125C), and 'SO' indicates the 28-pin SOIC package. Typical applications include industrial control, automotive subsystems, white goods, motor control, sensor signal conditioning, and general-purpose embedded control where deterministic 8-bit performance with abundant program memory is required. Designers favor this part when the application code exceeds PIC16 limits and when the firmware must be locked in OTP for cost-sensitive production. When designing with the PIC18C252T-E/SO, note that Microchip recommends migrating to the flash-based PIC18F252 for new designs because the PIC18C252 is positioned as a legacy/OTP device and is subject to long-term availability constraints. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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PIC18C252T-I/SO

PIC18C252T-I/SO - 32KB EPROM 8-bit MCU 28-SOIC | Microchip

The Microchip Technology PIC18C252T-I/SO is an OTP-based 8-bit RISC microcontroller in the PIC18C family, offering 32KB of EPROM program memory, 1.5KB of RAM, and 22 digital I/O pins. It is supplied in a 28-pin SOIC wide-body (7.5mm) package, tape and reel packed, and operates from a single 5V supply across the industrial -40C to +85C temperature range. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, RAM, non-volatile program memory (ROM/EPROM/Flash), and peripheral I/O on one die. The PIC18 family uses an enhanced RISC Harvard architecture with separate program and data buses, 16-bit wide instructions, and an 8-bit data path. MCUs sit inside the embedded computing hierarchy: microcontroller -> embedded processor -> semiconductor IC. They are the workhorse of low-power, deterministic control applications where a full application processor would be over-specified. Key features of the PIC18C252T-I/SO include 10 MIPS peak execution (40 MHz oscillator / 4 MHz-10 MHz input clock with PLL), 8 priority levels for interrupts, a single-cycle hardware 8x8 multiplier, an external oscillator interface, and 5V single-supply operation. The EPROM-based program memory allows windowed reprogramming for prototyping and short production runs; Microchip explicitly recommends PIC18F252 (Flash) for new designs. Architecturally, the device combines a 16-bit instruction word with an 8-bit data path, a 77-instruction set with single-word encoding, and a peripheral set that includes timers, a 10-bit A/D converter, and capture/compare/PWM modules. Power management is supported through sleep/Idle modes with fast wake-up. With OTP program memory, the PIC18C252T-I/SO suits low-volume or legacy system refreshes rather than high-volume flash production. Typical applications include industrial control, motor control front-ends, sensor signal conditioning with on-chip ADC, automotive body and HVAC subsystems, and any 5V embedded design that still requires EPROM-based firmware storage. The wide SOIC footprint also aids hand-soldering for prototyping and field rework. When designing with this MCU, allocate sufficient decoupling near VDD/VSS pins and verify timing margins on the external oscillator, since the 10 MIPS peak assumes a clean clock reference.

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PIC18C442-E/P

PIC18C442-E/P - 8-bit 40MHz 16KB OTP MCU | Microchip 40-DIP

The Microchip Technology PIC18C442-E/P is a high-performance 8-bit CMOS microcontroller built on the PIC18C architecture with 16KB (8K x 16) of One-Time-Programmable (OTP) program memory, 512 bytes of RAM, and a 40 MHz maximum operating frequency delivering up to 10 MIPS of throughput. It is housed in a 40-pin PDIP (Plastic Dual In-line Package, 0.600" / 15.24 mm body) for through-hole mounting. As a member of the PIC18C family, this device sits in the broader 8-bit MCU taxonomy: microcontroller -> embedded controller -> PIC microcontroller -> PIC18C series. PIC18C parts introduced the enhanced PIC18 instruction set with 16-bit wide instructions and an 8-bit wide data path, 77 single-word instructions, a hardware single-cycle 8x8 multiplier, and a vectored interrupt controller with multiple priority levels, superseding the earlier PIC16C/PIC17C families while remaining source-code compatible at the architectural level. Key features include a 10-bit analog-to-digital converter (ADC) with up to 8 input channels, three external hardware interrupt sources, a USART/SCI port, a master/slave SPI port, and a master I2C port. Capture/Compare/PWM (CCP) modules support timing and motor-control applications. The -E suffix denotes the extended industrial temperature grade of -40C to +125C. The external oscillator interface accepts a 4-10 MHz crystal or a 40 MHz clock input directly. Architecturally, the PIC18C442 implements a Harvard-style CPU with separate program and data buses, a 31-level hardware stack, and a programming model compatible with PIC16 mid-range parts. The OTP program memory is windowless, requiring no UV erase, simplifying manufacturing flow but removing field-upgrade capability. Designers upgrading to a flash-based equivalent should consider the PIC18F442 as the recommended migration path. Typical applications include industrial control panels, automotive body electronics, consumer appliances, HVAC thermostats, and general-purpose embedded designs that benefit from the 40-pin DIP form factor for prototype and through-hole assembly. The wide temperature range also makes it suitable for outdoor and automotive environments. When designing with this part, ensure the power supply decoupling follows Microchip's recommended layout: 0.1 uF ceramic capacitors placed within 5 mm of each VDD/VSS pair, plus a 10 uF bulk capacitor on the main rail. The MCLR pin must use the recommended RC reset network (typically 10 kohm pull-up to VDD with a 0.1 uF to ground) to guarantee a clean POR. This page synthesizes distributor pricing, drop-in PIC18C/PIC18F alternatives, and practical design notes not found in the manufacturer datasheet. Pricing and inventory are quoted as of 2026-09-26.

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PIC18C442-I/P

PIC18C442-I/P - 8-bit OTP MCU, 16KB, 40MHz, 40-PDIP | Microchip

The Microchip Technology PIC18C442-I/P is an 8-bit One-Time Programmable (OTP) CMOS microcontroller from the PIC18Cxx2 family, delivering 10 MIPS performance (100 ns instruction execution) at 40 MHz core speed. Housed in a 40-pin PDIP (0.600", 15.24 mm) through-hole package, it integrates 16 KB of OTP program memory (8K x 16 words), 512 bytes of RAM, and 33 digital I/O pins. The device retains Microchip's powerful PIC RISC architecture with only 77 single-word instructions, simplifying firmware development. A microcontroller (MCU) is a single-chip computer that contains a processor core, program memory, data memory, and configurable peripherals. The PIC18C family occupies the high-performance tier of Microchip's 8-bit MCU portfolio, positioned above the PIC16F baseline and below the dsPIC and PIC32 32-bit families in the broader embedded hierarchy (8-bit MCU -> microcontroller -> embedded controller -> semiconductor). This part belongs to the legacy PIC18C OTP generation, which Microchip has since replaced with flash-based PIC18F devices (PIC18F442 is the recommended modern replacement per Microchip's product page). Key features include a 10-bit analog-to-digital converter (ADC), a Master SSP (MSSP) peripheral, multiple timers, and an external oscillator interface. The OTP memory enables factory or low-volume programming, suitable for cost-sensitive production runs. The 40-pin PDIP package supports breadboard prototyping and through-hole assembly, which remains popular for legacy industrial controls, educational kits, and field-service replacements. The PIC18C442-I/P employs Microchip's enhanced PIC18 Harvard architecture with separate program and data buses, enabling simultaneous instruction fetch and operand access. The 8-bit data path and 16-bit instruction word provide a favorable code density / performance trade-off for control-oriented tasks. Operating from 4.2 V to 5.5 V, the device includes brown-out reset, power-on reset, and a watchdog timer for robust field deployment. Typical applications include industrial control systems, appliance controllers, automotive subsystems (non-safety), HVAC controls, and educational development platforms. The OTP memory makes it well suited for high-volume production where firmware is fixed at manufacture, while the 33 I/O pins comfortably drive keypads, displays, and sensor interfaces. When designing with this part, note that the PIC18C442 has reached end-of-life; Microchip recommends migrating to the pin-compatible flash-based PIC18F442. Designers should verify long-term supply availability before committing to new designs, since the OTP variant is no longer recommended for new product introduction. This page synthesizes distributor inventory, drop-in flash alternatives, and engineering guidance that go beyond the manufacturer datasheet, including a same-package replacement matrix to ease migration to flash memory.

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PIC18C452-E/L

PIC18C452-E/L - 8-bit OTP MCU, 32KB, 40MHz, 44-PLCC | Microchip

The Microchip Technology PIC18C452-E/L is a high-performance 8-bit CMOS OTP-based microcontroller built on the PIC18 RISC architecture, delivering 10 MIPS (100 ns instruction execution) at a 40 MHz clock in a 44-pin PLCC (J-Lead) package. It integrates 32 KB of One-Time Programmable (OTP) program memory organized as 16K x 16, 1536 bytes of RAM, 33 digital I/O pins, and an on-chip 10-bit analog-to-digital converter. An 8-bit microcontroller (MCU) is a programmable single-chip computer that combines a CPU, program memory, RAM, and peripherals on a single die. The PIC18 family specifically refers to Microchip's enhanced mid-range 8-bit architecture, the evolutionary successor to the PIC16 baseline, distinguished by 16-bit-wide instructions, an 8-bit-wide data path, a single-cycle hardware multiplier, and prioritized interrupts. The PIC18C452 belongs to the PIC18C OTP sub-family, sitting between the original PIC17 high-performance line and the later flash-based PIC18F series. The PIC18C452 is now obsolete and Microchip recommends migrating to the PIC18F452 flash-based counterpart. Key specifications include a 40 MHz maximum operating frequency, 77 single-word instructions, and a wide 2.0V to 5.5V supply range that makes the part suitable for both 3.3V and 5V designs. The integrated 10-bit A/D converter with multiple channels supports direct sensor interfacing, while the Master SSP (MSSP) module enables SPI and I2C communication. Note: per Microchip errata documentation, early PIC18C452 silicon exhibits anomalous behavior in the MSSP module that engineers must accommodate in firmware. The PIC18C452 uses a Harvard RISC architecture with a 21-bit program counter and 31-level hardware stack, allowing efficient C and assembly development. The OTP memory provides one-time programmability at lower cost than flash, which made the PIC18C family popular in cost-sensitive high-volume production where firmware is finalized. Typical applications include industrial control, automotive body electronics, appliance control, and embedded sensor systems where the integrated 10-bit ADC and 33 I/O pins allow direct connection to switches, relays, sensors, and human-machine interfaces. The wide voltage range and 40 MHz throughput also support motor control and HVAC subsystems. When designing with this part, verify the MSSP errata against your firmware; consider migrating to PIC18F452 if supply or long-term support is required. The PIC18C452-E/L ships in tube packaging and is supplied via quote-only distribution rather than real-time stock listings. This page synthesizes distributor pricing, drop-in alternatives including the PIC18F452 migration path, and practical design notes regarding the MSSP errata not found in the manufacturer datasheet summary.

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PIC18C452-I/L

PIC18C452-I/L - 8-bit 40MHz 32KB OTP MCU 44-PLCC | Microchip

The Microchip Technology PIC18C452-I/L is an 8-bit RISC CMOS one-time programmable (OTP) microcontroller delivering up to 10 MIPS of processing power from a 40MHz oscillator, packaged in a 44-pin PLCC (J-Lead, 16.59x16.59 mm) form factor. It integrates 32KB of program memory (16K x 16 words), 1.5KB of RAM, and 33 digital I/O pins, with an industrial operating temperature range (-40C to +85C) and a single 5V supply rail. A microcontroller (MCU) is a single-chip computer containing a processor core, non-volatile program memory, working RAM, and peripheral subsystems such as timers, capture/compare, ADC, and communication ports. The PIC18 family advances Microchip's PIC architecture with a 16-bit instruction word, an 8-bit data path, a hardware multiplier, and an extended register set, sitting between the legacy PIC16 and the higher-end PIC17 families in the company taxonomy. The PIC18C452 specifically is the 44-pin member of the OTP PIC18C generation, with sibling parts (PIC18C242/PIC18C252/PIC18C442) addressing 28- and 40-pin sockets. Key features include 77 single-word instructions (most single-cycle, 100 ns at 40 MHz), a programmable 16-level hardware stack, a vectored interrupt controller with 17 sources, an enhanced USART, MSSP (SPI/I2C), CCP modules, an 8-channel 10-bit ADC, and four timer/counters. The wide operating voltage and robust interrupt structure are signature strengths of the PIC18C generation, enabling deterministic real-time control with minimal software overhead. The PIC18C452 implements Microchip's classic Harvard RISC architecture with separate program and data buses, an arithmetic logic unit with hardware multiply, and a peripheral set designed for embedded control. The 32KB OTP program memory allows prototyping and low-volume production without external ROM, while the 1.5KB RAM buffer supports table lookups, stack frames, and protocol stacks such as UART command parsers. Typical applications include industrial control panels, HVAC thermostat boards, motor-control signal conditioning, instrumentation front-ends, and legacy embedded systems requiring five-volt logic with PLCC socket compatibility. Modern replacements such as PIC18F452 or PIC18F458 in the same PLCC-44 footprint are recommended for new designs because the PIC18C452 is in the PIC18C generation, which Microchip indicates is mature and recommends newer devices for new development. When designing with this device, ensure the OTP window is sealed for production code, plan code size around the 32KB ceiling, and verify the I/O drive current budget across all 33 pins. Engineers should note that Microchip's product page explicitly recommends PIC18F452 as the newer alternative, so the PIC18C452-I/L is best suited to legacy maintenance and exact-replacement scenarios rather than greenfield designs. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, including a vetted list of same-footprint PIC18F parts suitable for direct PCB replacement.

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PIC18C452/JW

PIC18C452/JW - 8-Bit 40MHz 32KB EPROM MCU | Microchip

The Microchip Technology PIC18C452/JW is an 8-bit CMOS microcontroller from the PIC® 18C family, integrating a 32KB (16K x 16) UV-erasable EPROM program memory, 1.5KB of RAM, and 34 digital I/O pins in a 40-pin CERDIP windowed package. It executes instructions at up to 10 MIPS from a 40MHz oscillator input, supports single-cycle hardware multiply, and includes a 10-bit multi-channel analog-to-digital converter. Connectivity peripherals comprise one USART, one SPI, and one I²C (Master/Slave) interface, plus two 8-bit and three 16-bit timer/counters, dual analog comparators, and a Capture/Compare/PWM (CCP) module. The /JW suffix denotes the CERDIP package with a quartz window for UV erasure, intended for prototyping and development. A microcontroller (MCU) is a single-chip computer that combines a CPU core, program memory, working RAM, and peripheral interfaces into one device. PIC microcontrollers (Peripheral Interface Controllers) use a Harvard RISC architecture with separate program and data buses, enabling single-cycle instruction execution. The PIC18 family extends PIC16 compatibility with a 16-bit instruction word, hardware multiply, and 16-bit data paths, positioning PIC18C parts as the high-performance tier before the PIC18F flash-based successors superseded them. The PIC18C452/JW key features include 32KB program, 1.5KB RAM, 256 bytes of EEPROM data, 34 I/O, 10-bit 8-channel ADC, USART/SPI/I²C, dual analog comparators, two PWM channels, programmable brown-out reset, and a wide 2.0V–5.5V operating range with four oscillator modes (LP, XT, HS, RC). Compared with PIC16 8-bit predecessors it offers a 16-bit instruction word, hardware multiplier (single-cycle 8×8), larger linear code space, and a richer interrupt structure. The architecture uses 77 single-word instructions and a 16-level deep hardware stack, with vectored interrupts and an enhanced peripheral set. The C-compiler friendly instruction set and 16-bit-wide program bus deliver deterministic performance, making the PIC18C452/JW suited to real-time control. Typical applications include industrial control prototyping, motor control, instrumentation with ADC front-ends, embedded serial comms bridges, and educational development kits where the UV window enables rapid code iteration. The device is also used as a reference design platform for migrating legacy PIC18C code to modern flash PIC18F devices. When designing with this device, evaluate whether a flash-based PIC18F452 is preferable for production: PIC18F parts are reprogrammable in-circuit, removing the UV-erasure workflow required by the PIC18C452/JW CERDIP. This page synthesizes distributor pricing, parametric comparison, and practical substitution guidance not found in the manufacturer datasheet, including same-package and cross-package drop-in guidance for both legacy and modern Microchip alternatives.

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PIC18C452T-E/L

PIC18C452T-E/L - 32KB OTP 8-bit MCU, 44-PLCC | Microchip

The Microchip Technology PIC18C452T-E/L is a high-performance 8-bit CMOS OTP microcontroller built on the PIC18C RISC architecture, delivering up to 10 MIPS of processing power with 100 ns instruction cycle time. The device integrates 32 KB of OTP program memory (16K x 16), 1.5 KB of general-purpose RAM, 256 bytes of EEPROM data memory, and 33 digital I/O pins in a 44-pin PLCC (J-Lead) package. What is an 8-bit OTP microcontroller? An OTP (One-Time-Programmable) microcontroller is a microcontroller whose program memory is implemented as one-time-writable non-volatile storage - the bit cells can be written once by the user but cannot be erased electrically. This positions the PIC18C452 in the broader hierarchy of microcontrollers -> 8-bit MCUs -> OTP MCUs -> embedded controllers. Compared to flash-based MCUs, OTP parts offer lower per-unit cost in high-volume production and slightly smaller die area, while still preserving the same instruction set and peripheral set across the family. Key features of the PIC18C452T-E/L include 10 MIPS throughput at 40 MHz, a 10-bit successive-approximation ADC with up to 8 input channels, a Master SSP (MSSP) module supporting SPI and I2C, a USART with addressable RX/TX buffering, two CCP modules, and an 8-bit parallel slave port (PSP). The device operates across an industrial temperature range of -40C to +125C and supports 2.0 V to 5.5 V supply. The enhanced (E) silicon variant provides wider Vdd and temperature tolerances than the baseline part. Architecturally, the PIC18C452 uses a 16-bit instruction / 8-bit data Harvard architecture with 77 single-word instructions, single-cycle hardware multiplier, and a 32-level deep hardware stack. The CPU fetches a 16-bit instruction in one cycle and operates on 8-bit data via 12 special-function and 11 general-purpose register file banks. Two 8-bit timers and three 16-bit timers provide flexible capture, compare, and PWM event management. Typical applications include industrial control panels, motor drive front-ends, instrumentation data logging, sensor signal conditioning, and embedded control blocks where the -E/L extended-temperature range and OTP cost model are required. The PIC18C452 is one of the original PIC18 family members; PIC18F452 flash variants are now the mainstream upgrade path with the same peripheral set, so many legacy designs are migrating footprints via drop-in compatible flash siblings. When designing with this device, verify the supply decoupling network: place a 0.1 uF ceramic close to each Vdd/Vss pair and bulk capacitance on the analog supply AVdd/AVss pins. The MSSP module has a known silicon errata that must be reviewed before production commit. This page synthesizes distributor pricing, drop-in alternative candidates, and practical design notes drawn from the verified Microchip datasheet - information not aggregated in the datasheet alone.

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PIC18C452T-E/PT

PIC18C452T-E/PT - 8-Bit MCU 32KB EPROM 5V TQFP-44 | Microchip

The Microchip PIC18C452T-E/PT is an 8-bit RISC microcontroller with 32KB of one-time-programmable (OTP) EPROM program memory housed in a 44-pin TQFP (PT) package. It belongs to the PIC18C family and operates from a 5V supply, delivering up to 10 MIPS performance from a 40 MHz oscillator input through its 16-bit instruction word and 8-bit data path architecture. An 8-bit microcontroller (MCU) is a single-chip computer containing a CPU, program memory, data RAM, and integrated peripherals such as timers, ADC, communication interfaces, and I/O ports. The PIC18C family sits within Microchip's high-performance 8-bit portfolio, optimized for embedded control where deterministic instruction timing, low part cost, and rich peripheral integration outweigh the throughput of 16-bit or 32-bit cores. Key features include 1536 bytes of data RAM, 34 digital I/O pins, a 10-bit multi-channel analog-to-digital converter (ADC), two Capture/Compare/PWM (CCP) modules, three external interrupt pins, four timers (Timer0 8/16-bit, Timer1 16-bit, Timer2 8-bit, Timer3 16-bit), a hardware single-cycle multiplier, and a Parallel Slave Port (PSP). The device supports in-circuit serial programming (ICSP) and is qualified to the extended automotive temperature grade (-40°C to +125°C). Architecturally, the PIC18C452 uses an enhanced Harvard bus architecture with separate program and data paths, enabling simultaneous instruction fetch and operand access. The hardware multiplier completes 8-bit x 8-bit operations in a single cycle, accelerating digital filter math, PID loops, and CRC-style routines common in motor-control and instrumentation firmware. Typical applications include industrial control systems, automotive body and powertrain subsystems, instrumentation front-ends with ADC-based sensor acquisition, and embedded control boards replacing discrete logic with a programmable solution. The wide I/O count makes it suitable as a host MCU for human-machine interface (HMI) boards and small appliances. When designing with this device, note that OTP memory prevents firmware field updates; for production runs requiring firmware revision flexibility, consider the pin-compatible PIC18F452 flash variant. Decoupling the 5V rail with 100 nF ceramic capacitors placed within 5 mm of each supply pin minimizes switching noise on the internal analog sections. This page synthesizes distributor pricing, drop-in-compatible alternatives, and practical design notes for the PIC18C452T-E/PT that are not found in a single manufacturer datasheet, accelerating your sourcing and design decisions.

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PIC17LC766-08I/L - 8-Bit 8MHz 32KB OTP MCU | Microchip | 84-PLCC

PIC17LC766-08I/PT - 8-Bit 8MHz 32KB OTP MCU | Microchip

PIC17LC766T-08/L - 8-bit CMOS MCU, 8MHz, 32KB EPROM, CDIP-40

PIC17LC766T-08/PT - 8-bit PIC MCU, 32KB OTP, 80-TQFP | Microchip

PIC17LC766T-08I/L - 8-Bit 8MHz 32KB OTP MCU 84-PLCC | Microchip

PIC17LC766T-08I/PT - 8-Bit 8MHz 32KB OTP MCU | Microchip

PIC18C242-E/SP - 8-Bit PIC MCU, 16KB OTP, 28-Pin SPDIP | Microchip

PIC18C242-I/SO - 8-bit 40MHz OTP MCU, 16KB, 28-SOIC | Microchip

PIC18C242-I/SP - 8-Bit 40MHz 16KB OTP MCU | Microchip

PIC18C242/JW - 40MHz 8-Bit MCU, 16KB EPROM, 28-CerDIP Window | Microchip

PIC18C242T-E/SO - 8-bit 40MHz PIC MCU 16KB OTP SOIC-28 | Microchip

PIC18C252-E/SO - 32KB OTP 8-bit MCU, 10 MIPS, 28-SOIC | Microchip

PIC18C252-E/SP - 8-bit MCU, 32KB OTP, 10 MIPS | Microchip

PIC18C252-I/SP - 8-bit OTP MCU 32KB Flash 40MHz | Microchip

PIC18C252/JW - 8-Bit 40MHz 32KB EPROM 28-CerDip MCU | Microchip

PIC18C252T-E/SO - 8-Bit 40MHz OTP MCU, 32KB, 28-SOIC | Microchip

PIC18C252T-I/SO - 32KB EPROM 8-bit MCU 28-SOIC | Microchip

PIC18C442-E/P - 8-bit 40MHz 16KB OTP MCU | Microchip 40-DIP

PIC18C442-I/P - 8-bit OTP MCU, 16KB, 40MHz, 40-PDIP | Microchip

PIC18C452-E/L - 8-bit OTP MCU, 32KB, 40MHz, 44-PLCC | Microchip

PIC18C452-I/L - 8-bit 40MHz 32KB OTP MCU 44-PLCC | Microchip

PIC18C452/JW - 8-Bit 40MHz 32KB EPROM MCU | Microchip

PIC18C452T-E/L - 32KB OTP 8-bit MCU, 44-PLCC | Microchip

PIC18C452T-E/PT - 8-Bit MCU 32KB EPROM 5V TQFP-44 | Microchip