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PIC16LC63A-04/SP - 8-Bit CMOS MCU, 7KB OTP, 28-Pin SPDIP | Microchip
PIC16LC63A-04/SP

PIC16LC63A-04/SP - 8-Bit CMOS MCU, 7KB OTP, 28-Pin SPDIP | Microchip

The Microchip Technology PIC16LC63A-04/SP is an 8-bit RISC CMOS microcontroller in the PIC16C family, offering 7 KB of OTP program memory (4K x 14 words), 192 bytes of RAM, and 22 digital I/O pins in a 28-pin SPDIP (Skinny Plastic DIP) through-hole package. It operates across a 3 V to 5.5 V supply range at up to 4 MHz clock speed, and integrates peripherals including a 10-bit ADC, USART, MSSP (SPI/I2C), and capture/compare/PWM modules. A PIC16 microcontroller is a member of the reduced instruction set computing (RISC) Harvard-architecture microcontroller family originally developed by Microchip. PIC16 devices use a 14-bit instruction word, separate program and data buses, and a small instruction set (35 single-word instructions) optimized for deterministic single-cycle execution. PIC16LC63A is the low-voltage CMOS (LC) variant of the PIC16C63A OTP (one-time-programmable) family, distinguished from the PIC16F flash parts by its windowed/OTP memory and lower active current draw. Key features include a 4 MHz internal oscillator option, a hardware USART for serial communication, two 8-bit timers plus one 16-bit timer, a 10-bit multi-channel analog-to-digital converter, and brown-out detection. The PIC16LC63A-04/SP variant supports a maximum oscillator frequency of 4 MHz and a maximum instruction cycle time of 250 ns, while the -04I/SP and -10 variants extend operation to higher frequencies and wider industrial temperature ranges. The PIC16C63A architecture combines a high-performance RISC CPU with on-chip peripherals targeted at embedded control applications. The 35 single-word instructions - all single-cycle except for program branches - allow efficient code density, and the separate instruction and data buses enable simultaneous fetch and execute. Brown-out reset, power-on reset, watchdog timer with on-chip RC oscillator, and code protection enhance robustness in field-deployed designs. Typical applications include industrial automation controllers, sensor signal conditioning, motor control, embedded data acquisition, simple user interfaces, and consumer appliance control. The PIC16LC63A-04/SP is well-suited to low-power battery-fed equipment where the LC process node provides lower active and standby current than the original PIC16C63A part. Its 22 I/O pins comfortably support a keypad matrix, LCD interface, or multiple sensor inputs. When designing with the PIC16LC63A-04/SP, verify programming tool compatibility. The PIC16LC63A-04 is OTP, so firmware cannot be updated in-circuit after programming without a windowed device. Use the MPLAB PM3 programmer and MPLAB X IDE for development, and consider a PIC16F-series pin-compatible device if in-circuit reprogrammability is required. This page synthesizes distributor pricing, same-family drop-in alternatives, and practical design notes that complement the manufacturer datasheet.

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PIC16LC63A-04I/SO - 8-bit MCU, 7KB OTP, 22 I/O, 28-SOIC | Microchip
PIC16LC63A-04I/SO

PIC16LC63A-04I/SO - 8-bit MCU, 7KB OTP, 22 I/O, 28-SOIC | Microchip

The Microchip Technology PIC16LC63A-04I/SO is an 8-bit CMOS microcontroller from the PIC16CXX mid-range family, packaged in a 28-pin SOIC (SO) and offering 7KB (4K x 14) of One-Time-Programmable (OTP) program memory with 192 bytes of RAM. Operating at a clock speed of 4 MHz, this LC (low-power CMOS) part supports an input voltage range of 3.0V to 5.5V and delivers 22 digital I/O lines, making it suitable for cost-sensitive, low-power embedded designs. What is a PIC16C-series microcontroller? PIC16C-series microcontrollers are 8-bit Harvard-architecture MCUs built around a RISC CPU with 35 single-word instructions. The 'LC' suffix denotes a low-power CMOS process node optimized for battery and sleep-dominated applications, while the '63A' part belongs to Microchip's mid-range PIC16 family targeting general-purpose control. These MCUs sit in the broader hierarchy: microcontroller -> embedded MCU -> 8-bit RISC processor -> semiconductor IC. They typically include on-chip peripherals such as timers, a USART, capture/compare/PWM modules and parallel ports, with program memory available in EPROM, OTP or ROM flavors. The PIC16LC63A-04I/SO features a high-performance RISC CPU, fully static design (allowing the clock to be stopped without losing register state), a wide operating voltage range and a 4 MHz maximum clock at 3V. It is offered in industrial temperature grade (denoted by the 'I' suffix) with low typical current consumption. Its 22 I/O pins are sufficient for keypad scanning, LED matrix driving, simple sensor hubs and serial-bridge applications. The 28-SOIC package enables standard surface-mount assembly and easy hand-soldering for prototyping. Typical applications include industrial control panels, appliance user-interface controllers, low-power remote sensor nodes, smart-meter peripherals, and serial-bridge or protocol-converter modules. Designers choose the PIC16C63A family for legacy code reuse, deterministic interrupt latency, and long-life-cycle availability in industrial markets. When designing with this device, ensure your firmware is OTP-compatible (single programmability), allocate decoupling capacitors close to VDD/VSS pins, and validate oscillator startup behavior across the industrial temperature range. For modern designs requiring re-programmability, consider the flash-based PIC16F equivalent families. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical engineering design notes not found in the manufacturer datasheet alone, providing a one-stop reference for procurement, engineering, and lifecycle planning.

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PIC16LC63A-04I/SP - 8-bit PIC MCU, 7KB OTP, 22 I/O, 28-SPDIP | Microchip
PIC16LC63A-04I/SP

PIC16LC63A-04I/SP - 8-bit PIC MCU, 7KB OTP, 22 I/O, 28-SPDIP | Microchip

The Microchip Technology PIC16LC63A-04I/SP is a low-power, high-performance CMOS 8-bit microcontroller in the PIC16CXX mid-range family, delivered in a 28-pin SPDIP (Skinny Plastic DIP) through-hole package. The part integrates 7KB of One-Time-Programmable (OTP) program memory organized as 4K x 14 words, 192 bytes of data RAM, and 22 digital I/O pins, while operating at clock speeds up to 4 MHz from a 3.0V to 5.5V supply. An MCU (microcontroller unit) is a single-chip computer that combines a CPU core, program and data memory, peripheral set, and I/O on one die, and the PIC16CXX mid-range family represents Microchip's original RISC-based 8-bit architecture used in millions of embedded designs. This hierarchy - 8-bit MCU -> mid-range PIC -> PIC16CXX -> PIC16LC6x - places the PIC16LC63A at the low-power (LC) variant level, which trades maximum clock speed for reduced supply current, making it ideal for battery and energy-sensitive applications. Key features include 35 single-word instructions with single-cycle execution (except branches, which take two cycles), an operating speed up to 4 MHz at 5V, low power consumption (5 mA typical at 5V/4 MHz, and 1 uA typical at 3V/32 kHz), and integrated peripherals covering I2C, SPI, and USART connectivity. The 'I' temperature suffix denotes the industrial operating range of -40C to +85C, and the SPDIP-28 footprint supports easy prototyping, breadboarding, and legacy through-hole assembly. The PIC16LC63A uses a Harvard RISC architecture with separate program and data buses, enabling most instructions to execute in one instruction cycle. Its 14-bit instruction word width gives more compact code than 8-bit CISC alternatives, while the OTP program memory allows fast, low-cost factory programming for moderate-volume production. The 'LC' (Low-power CMOS) process delivers the lowest standby current in the PIC16C6x series. Typical applications include industrial control and sensor interfaces, low-power battery instruments, automotive body and chassis subsystems (non-safety), consumer appliance controllers, and embedded communication front-ends (USART/SPI bridges). Engineers often pair this part with external EEPROM for data logging and with RS-232/RS-485 transceivers for legacy industrial networking. A key design consideration: the 04 speed grade limits operation to 4 MHz at 5V - choose the -20 variant if the application needs the full 20 MHz clock. OTP memory is one-time programmable, so firmware must be fully validated on a windowed or flash-equivalent variant (e.g. PIC16F877) before committing to OTP. This page synthesizes distributor stock and pricing, drop-in same-package alternatives, and design notes compiled from Microchip datasheet specifications not typically aggregated on a single product page.

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PIC16LC63A-04I/SS - 4MHz 8-bit MCU 7KB OTP 192 RAM | Microchip
PIC16LC63A-04I/SS

PIC16LC63A-04I/SS - 4MHz 8-bit MCU 7KB OTP 192 RAM | Microchip

The Microchip Technology PIC16LC63A-04I/SS is an 8-bit CMOS microcontroller from the PIC16C mid-range family, featuring a 4 MHz CPU clock, 7 KB (4K x 14) One-Time-Programmable (OTP) program memory, and 192 bytes of RAM. Housed in a 28-pin SSOP package (5.30 mm / 0.209 inch body width), it offers 22 digital I/O pins and is qualified for the industrial temperature range of -40°C to +85°C, making it well suited for embedded designs that require reliable operation in harsh environments. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, working RAM, and peripheral I/O on one IC. Within the broader product hierarchy, this part belongs to the 8-bit PIC family, which sits under the PIC16CXX mid-range family, then microcontrollers, then embedded processors, then semiconductors. The 'LC' suffix denotes the low-power CMOS variant optimized for 3.3 V / 5 V dual-voltage operation, which reduces active current draw compared to the standard PIC16C63A. This part has been documented by Microchip as part of the PIC16C63A/65B/73B/74B device group. Key features include an integrated 8-channel 8-bit Analog-to-Digital Converter (ADC), I²C/SPI/USART serial communication peripherals, a programmable 8-bit timer/counter with an 8-bit prescaler, and a watchdog timer for unattended recovery. The 4 MHz maximum clock rate produces a 250 ns instruction cycle, which is adequate for slow control loops, sensor polling, and low-bandwidth human-machine interface panels. The 22 I/O pins are 5 V tolerant on the digital domain. Typical applications include industrial control panels, sensor signal conditioning front-ends, low-speed UART/I²C bridges, smart battery management, low-power remote sensor nodes, white-goods and appliance controllers, and small consumer devices. Engineers frequently select this part for designs migrated from the legacy PIC16C63A where field-proven code and a familiar toolchain (MPLAB IDE, MPASM, MPLAB C17) are required. When designing with this device, note that OTP memory cannot be re-programmed in-circuit; the ICE/ICD variants are recommended for development. Add a 100 nF decoupling capacitor close to VDD and use a hardware or software reset of adequate width (≥ 72 ms typical with PWRT enabled) to guarantee oscillator stabilization on cold start. Operating voltage is 3.0 V to 5.5 V. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes that are not found in the manufacturer datasheet, providing information gain beyond standard component listings.

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PIC16LC63AT-04/SO - 4MHz 8-bit MCU 7KB OTP 28-SOIC | Microchip
PIC16LC63AT-04/SO

PIC16LC63AT-04/SO - 4MHz 8-bit MCU 7KB OTP 28-SOIC | Microchip

The Microchip Technology PIC16LC63AT-04/SO is an 8-bit CMOS microcontroller from the PIC16CXX mid-range family, featuring 7KB (4K x 14) of One-Time Programmable (OTP) program memory and 192 bytes of RAM in a 28-pin SOIC surface-mount package. It is part of the PIC16LC63A/65B/73B/74B sub-family and runs at 4 MHz internal clock speed with a 3V to 5.5V supply voltage range, supporting low-voltage operation suited for portable and industrial designs. The 'T' suffix denotes tape-and-reel packaging, while '04' indicates the 4 MHz speed grade and '/SO' specifies the 28-SOIC package. A microcontroller (MCU) is a single-chip computer containing a CPU, RAM, non-volatile program memory, and peripheral interfaces. The PIC16LC63AT-04/SO belongs to the PIC16C mid-range architecture, a Harvard RISC design with separate program and data buses. Positioned in the broader hierarchy, it is a microcontroller -> 8-bit MCU -> embedded controller -> semiconductor IC. This taxonomy matters for engineers sourcing drop-in equivalents, because mid-range PIC MCUs share instruction sets, peripheral sets, and pinouts within the family, enabling code portability across the PIC16C6x/6xx/7xx lines. Key features include 22 I/O pins, an integrated 8-channel 8-bit A/D converter, USART, MSSP (SPI/I2C) interface, two 8-bit timers and one 16-bit timer with capture/compare/PWM, a 14-bit instruction word, and 35 single-word instructions for compact code. The OTP memory provides one-time programmability, typically used in production volumes where code is finalized. Power management features include dual on-chip voltage regulators, power-on reset, brown-out reset, and a watchdog timer for reliable field operation. The PIC16LC63A architecture uses a fully-static CMOS design with a 4-stage pipeline for single-cycle instruction execution (program branches take 2 cycles). The high-performance RISC CPU delivers predictable timing suitable for real-time control loops, while integrated peripherals eliminate the need for external ADC, UART, or timer ICs, reducing BOM cost. The 'LC' (Low-voltage CMOS) designation confirms 3.0V minimum operation, distinguishing it from standard 'C' parts that require 4.5V minimum. Typical applications include industrial automation controllers, consumer electronics user interfaces, sensor signal conditioning with on-chip ADC, motor control with PWM, and embedded communication nodes using USART or I2C. Its 22 I/O lines and 28-SOIC footprint suit mid-density designs that require analog inputs without external ADC cost. When designing with the PIC16LC63AT-04/SO, note that OTP memory cannot be reprogrammed, so this part targets mature, high-volume production where firmware is stable. Use the windowed JW variant for development. Ensure MPLAB X IDE with MPASM or XC16C compiler is configured for the PIC16C63A device ID, and verify the 28-SOIC PCB footprint matches standard 1.27 mm pitch SOIC land patterns. This page synthesizes distributor pricing, drop-in PIC16C6x alternatives, and practical design notes not found in the manufacturer datasheet alone.

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PIC16LC63AT-04/SS - 8-Bit 4MHz OTP MCU 7KB | Microchip
PIC16LC63AT-04/SS

PIC16LC63AT-04/SS - 8-Bit 4MHz OTP MCU 7KB | Microchip

The Microchip Technology PIC16LC63AT-04/SS is an 8-bit CMOS RISC microcontroller in the PIC16CXX mid-range family, featuring 7KB (4K x 14) of One-Time Programmable (OTP) program memory, 192 bytes of RAM, and 22 digital I/O lines, housed in a 28-pin SSOP package. It operates at up to 4 MHz clock speed from a 3 V to 5.5 V supply and is specified over the industrial -40C to +85C temperature range, with the /T suffix indicating tape-and-reel packaging. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, data RAM, and peripheral interfaces on a single die. Within the broader semiconductor taxonomy, an MCU is a sub-class of microcomputer, which sits under microprocessor and ultimately under digital IC. The PIC16CXX family is part of Microchip's mid-range architecture and serves the same role as competing 8-bit families such as the 8051 (Intel/MCS-51 lineage) and Atmel/Microchip AVR, typically chosen for cost-sensitive embedded control where 32-bit performance is unnecessary. Key features of the PIC16LC63AT-04/SS include integrated peripherals for robust embedded designs: Power-On Reset (POR), Brown-Out Reset (BOR), a Watchdog Timer (WDT) with its own on-chip RC oscillator, and a Pulse Width Modulation (PWM) module. The mid-range core offers 35 single-word instructions, all single-cycle except program branches (two cycles), giving deterministic interrupt latency. The on-chip peripherals reduce external component count, while the SSOP-28 footprint supports compact surface-mount PCB layouts. The device is built on Microchip's OTP CMOS process and uses a Harvard architecture with separate program and data buses. The 4 MHz maximum clock rate at 3-5.5 V and 14-bit instruction word place this part in the mid-range performance class, balancing throughput against power consumption for battery-aware and line-powered designs alike. Typical applications include consumer electronics, industrial automation controllers, sensor signal conditioning, low-speed motor control, simple user-interface nodes, and battery-backed instruments. The integrated WDT and BOR make it well-suited to unattended installations requiring autonomous reset behavior. When designing with the PIC16LC63AT-04/SS, note that OTP memory cannot be re-programmed in-circuit; a flash-based sibling such as the PIC16F873A is required if field re-programmability is needed. Validate brown-out threshold settings against your worst-case supply droop to avoid spurious resets. This page synthesizes distributor pricing, drop-in alternative MPNs from the same PIC16LC6x family, and practical design notes not collected on a single manufacturer datasheet page.

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PIC16LC63AT-04I/SS - 8-bit MCU, 7KB, 4MHz, 28-SSOP | Microchip
PIC16LC63AT-04I/SS

PIC16LC63AT-04I/SS - 8-bit MCU, 7KB, 4MHz, 28-SSOP | Microchip

The Microchip PIC16LC63AT-04I/SS is an 8-bit CMOS RISC microcontroller from the PIC16CXX mid-range family, featuring 7 KB of OTP program memory (organized as 4K x 14), 192 bytes of RAM, and a 5-channel 8-bit ADC. It is housed in a 28-pin SSOP package supplied in Tape & Reel, targets a 4 MHz oscillator input, and operates from a 3.0 V to 5.5 V supply, making it suitable for 3.3 V and 5 V designs. A PIC16 mid-range microcontroller is a Harvard-architecture RISC device with separate program and data buses, a fixed instruction set of 35 single-word instructions, and a two-stage pipeline that lets most instructions execute in a single instruction cycle (200 ns at 20 MHz / 1 us at 4 MHz). It belongs to the broader 8-bit MCU category (PIC, 8051, AVR), positioned below 16-bit dsPIC/PIC24 and 32-bit MCU families in Microchip's portfolio, and is used wherever deterministic control, low power, and small footprint matter more than raw compute. Key features include 22 digital I/O pins, two 8-bit timers plus one 16-bit Timer1 with capture/compare, a USART with addressable Receive Interrupt, an SPI/I2C-compatible Synchronous Serial Port (SSP), five analog input channels with 8-bit resolution, and a Watchdog Timer with its own on-chip RC oscillator. Brown-out Reset, Power-on Reset, and an extended 14-bit instruction word complete the integrated peripheral set. The architecture is fully static CMOS with on-chip oscillator support for crystal, ceramic resonator, and RC modes. The 'LC' designation denotes the low-voltage (3.0-5.5 V) variant, while 'T' marks the Tape & Reel packaging option, '-04' the 4 MHz speed grade, 'I' the industrial -40 C to +85 C temperature range, and 'SS' the 28-pin SSOP outline (0.209 inch / 5.30 mm body width). Typical applications include industrial control, motor control front-ends, sensor signal conditioning, low-power portable instruments, and consumer appliance user interfaces. Its 5-channel ADC and USART make it a natural fit for serial-connected remote sensor nodes and small protocol bridges in factory and building automation. When designing with this part, note that the OTP program memory cannot be re-programmed in-circuit; plan firmware revision strategy around a Flash-based sibling such as PIC16F873 if field updates are required. Decouple VDD with a 0.1 uF ceramic close to the pins and follow Microchip's recommended MCLR pull-up and ICSP layout if in-system programming is desired. This page synthesizes distributor pricing, same-package drop-in alternatives (including the Site MPN-preferred PIC16LC63A-04I/SS), and practical design notes not found on a single distributor page, giving engineers an at-a-glance comparison vs the F-flash and C-OTP siblings.

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PIC16LC63T-04I/SO - 8-Bit 4MHz 7KB OTP MCU 28-SOIC | Microchip
PIC16LC63T-04I/SO

PIC16LC63T-04I/SO - 8-Bit 4MHz 7KB OTP MCU 28-SOIC | Microchip

The Microchip Technology PIC16LC63T-04I/SO is an 8-bit PIC microcontroller from the PIC16C family, offering 4 MHz CPU speed, 7 KB (4K x 14) of One-Time-Programmable (OTP) program memory, and 192 bytes of RAM, packaged in a 28-pin SOIC for surface-mount assembly. An OTP microcontroller is a single-chip embedded controller that integrates a CPU core, non-volatile program memory, RAM, peripherals, and I/O on one die. The PIC16C family uses a Harvard RISC architecture with 35 single-word instructions, a 14-bit instruction word, and most instructions executing in one instruction cycle (four oscillator periods); only program branches take two cycles. The PIC16LC6x series is the low-power CMOS variant of the PIC16C6x, optimized for operation across the 2.5 V to 6.0 V supply range. Within the broader hierarchy, this part is a microcontroller -> embedded processor -> semiconductor -> integrated circuit. Key features include 22 digital I/O pins, an 8-bit timer/counter, a 13-bit program counter capable of addressing 8K x 14 of program memory, and an internal watchdog timer. The 28-pin SOIC package provides a 7.50 mm body width with a 1.27 mm pitch suitable for standard SMT assembly lines. The 'I' suffix denotes the industrial temperature range of -40 C to +85 C, allowing deployment in uncontrolled-environment applications. The 'LC' designation confirms the CMOS low-power process and 2.5 V to 6.0 V supply tolerance versus the standard 4.5 V to 5.5 V PIC16C63 part. The architecture uses separate program and data buses (Harvard) with a 14-bit program word, allowing single-cycle instruction fetch even when the data bus is busy. OTP memory is programmed once with a device programmer and cannot be erased; this makes the part cost-optimized for high-volume production where code is stable and field reprogramming is not required. The 'T' suffix indicates Tape-and-Reel packaging for high-speed pick-and-place assembly. Typical applications include automotive body controllers, consumer appliance control boards, industrial sensor interfaces, and low-power embedded controllers. The wide 2.5 V to 6.0 V supply range allows direct operation from 3.3 V or 5 V rails without level shifting. When designing with this device, allocate sufficient decoupling (100 nF + 10 uF) close to VDD, route the MCLR pin to a proper reset supervisor, and confirm the oscillator selection matches the 4 MHz target before committing to firmware timing assumptions. This page synthesizes distributor pricing, drop-in alternatives from the PIC16LC6x family, and practical design notes that go beyond the manufacturer datasheet alone.

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PIC16LC642-04/SO - 8-Bit 4MHz OTP MCU 7KB | Microchip
PIC16LC642-04/SO

PIC16LC642-04/SO - 8-Bit 4MHz OTP MCU 7KB | Microchip

The Microchip Technology PIC16LC642-04/SO is an 8-bit RISC microcontroller from the PIC® 16C family, featuring 4MHz maximum operating speed, 7KB (4K x 14) of OTP program memory, 176 bytes of RAM, and 22 I/O pins, all packaged in a 28-pin SOIC (Small Outline IC) form factor. A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory, and programmable I/O peripherals on a single die. The PIC16C/PIC16LC family represents one of the earliest and most successful 8-bit RISC architectures, with the PIC16LC variants optimized for low-voltage (3.0V to 5.5V) operation. Within the broader taxonomy, this part sits in the hierarchy: microcontroller -> 8-bit MCU -> RISC MCU -> embedded controller -> semiconductor IC. The 'LC' designation specifically indicates CMOS low-power operation, and the '04' speed suffix denotes a 4MHz oscillator/clock limit. Key features include 35 single-word instructions (most single-cycle, with program branches taking two cycles), a Harvard architecture with separate program and data buses, and OTP (One-Time Programmable) memory that allows programming exactly once, making it ideal for mature, stable-volume products where firmware is finalized. The 22 I/O pins support direct LED drive, TTL-compatible inputs, and standard peripheral interfacing. Technical depth: The PIC16LC642 uses a 14-bit instruction word with an 8-bit data path, providing a code-efficient instruction set for C and assembly development. The integrated RISC core delivers deterministic interrupt response in as little as one instruction cycle, which is critical for real-time control loops. Internal peripherals include timers, a watchdog timer, and an analog comparator that supports brown-out and voltage-monitoring functions. Typical applications include industrial control nodes, appliance controllers, automotive sub-systems (non-safety-critical), consumer electronics, and legacy embedded products that require 5V-tolerant logic. With 7KB of OTP and 176 bytes of RAM, the device targets medium-complexity control tasks that do not require field re-programming. When designing with this device, ensure the MCLR reset circuit includes the proper pull-up and decoupling as shown in the Microchip PIC16C6xx reference design. The OTP memory has no revision capability, so production firmware must be fully validated before programming. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes that go beyond the manufacturer datasheet, giving engineers a single reference for sourcing and validation decisions.

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PIC16LC642-04/SP - 8-bit PIC MCU 7KB EPROM 22 I/O | Microchip
PIC16LC642-04/SP

PIC16LC642-04/SP - 8-bit PIC MCU 7KB EPROM 22 I/O | Microchip

The Microchip PIC16LC642-04/SP is an 8-bit CMOS EPROM-based microcontroller from the PIC16 family with a 7KB program memory, 176 bytes of RAM, 22 digital I/O lines, and a 4 MHz rated clock speed, packaged in a 28-pin SPDIP through-hole tube. It is a member of the PIC16C64x sub-family and operates from a wide 3.0V to 5.5V supply, making it compatible with both 3.3V and 5V system rails. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (ROM/EPROM/Flash), data memory (RAM), and a configurable set of peripheral modules. PIC microcontrollers use a RISC (Reduced Instruction Set Computer) Harvard architecture, separating program and data bus paths to allow simultaneous instruction fetch and operand access. The PIC16 family occupies the mid-range tier of Microchip's portfolio, sitting between the baseline PIC10/12/16 families and the high-performance PIC17/PIC18 families, and is widely used in industrial control, automotive subsystems, and consumer appliances where deterministic execution and low cost matter more than raw MIPS. Key features of this part include 35 single-word instructions, all single-cycle except program branches which take two cycles, a hardware multiplier-free ALU optimized for bit and byte operations, an 8-bit timer/counter, a watchdog timer, on-chip power-on reset, brown-out detection, and an EPROM program memory that allows windowed erasure for prototype iteration. The instruction set is fully upward compatible with the broader PIC16 mid-range family, so code developed for related PIC16C/PIC16F parts can be retargeted with minimal rewrite. Typical applications include industrial control logic, automotive body and accessory electronics, remote-control transmitters, sensor signal conditioning front-ends, low-cost data acquisition nodes, and simple user-interface controllers. The 22 I/O pins comfortably drive LED indicators, keypads, character LCDs, and serial-interface peripherals. When designing with this part, place a 0.1uF decoupling capacitor as close as possible to the VDD pin and keep EPROM programming-voltage traces away from sensitive analog lines. The /SP suffix designates the 28-pin skinny plastic DIP package supplied in tubes, the most user-friendly form factor for prototype and through-hole assembly. For new designs, evaluate the Flash-based PIC16F-series equivalents for easier firmware iteration.

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PIC16LC642-04I/SP - 4MHz 8-bit OTP MCU, 7KB EPROM, 28-SPDIP | Microchip
PIC16LC642-04I/SP

PIC16LC642-04I/SP - 4MHz 8-bit OTP MCU, 7KB EPROM, 28-SPDIP | Microchip

The Microchip Technology PIC16LC642-04I/SP is an 8-bit RISC CMOS microcontroller in a 28-pin SPDIP (Skinny Plastic DIP) package, integrating 7 KB of One-Time-Programmable (OTP) EPROM program memory, 176 bytes of RAM, and 22 digital I/O lines. Operating from a 3.0 V to 5.5 V supply and clocked up to 4 MHz, it is the LC (low-power CMOS) variant of the EPROM-based PIC16C642, sharing the same 35-instruction RISC core and instruction set as the PIC16C66/PIC16C67 family. The device is rated for the industrial temperature range (-40 °C to +85 °C). An 8-bit PIC microcontroller is a Harvard-architecture MCU that separates program and data memory, executing one instruction per clock cycle (except branches, which take two). OTP EPROM-based MCUs like the PIC16LC642 target cost-sensitive through-hole industrial designs where in-system reprogramming is not required; the 'LC' suffix denotes a low-power CMOS process node optimized for battery and quiescent-current-sensitive applications. Within the broader MCU taxonomy, this part sits at: 8-bit MCU -> microcontroller -> embedded processor -> semiconductor. Key features include 7 KB OTP EPROM, 176 bytes of RAM, 22 I/O pins, 8-bit A/D converter, USART, capture/compare/PWM modules, and an instruction cycle time of 250 ns at 4 MHz. The PIC16LC642-04I/SP supports both RC and crystal/ceramic resonator oscillator modes and is fully static, allowing the clock to be stopped for additional power savings. Typical applications include industrial control panels, appliance controllers, automotive body electronics subsystems, sensor-interface nodes, and legacy through-hole designs requiring the PIC16C66 instruction-set compatibility. The wide 3.0 V to 5.5 V supply range enables direct operation from a regulated 5 V rail or a 3.3 V logic supply without level shifters. When designing with this MCU, note that the OTP variant is one-time-programmable - firmware revisions require a new device. The 28-pin SPDIP footprint remains popular in educational kits, retrofit boards, and through-hole assembly lines where socketed replacements simplify field service. The 'I' suffix denotes industrial temperature grade, and the 'SP' suffix denotes SPDIP-28 package. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet alone, enabling faster sourcing decisions for engineers maintaining legacy PIC16 designs.

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PIC16LC64A-04/L - 8-bit PIC MCU, 4MHz, 3.5KB OTP, PLCC-44 | Microchip
PIC16LC64A-04/L

PIC16LC64A-04/L - 8-bit PIC MCU, 4MHz, 3.5KB OTP, PLCC-44 | Microchip

The Microchip Technology PIC16LC64A-04/L is an 8-bit RISC microcontroller based on the PIC16C6x core, designed for low-power, high-performance embedded control. Per distributor listings, the device operates at a maximum clock frequency of 4 MHz, integrates 3.5 KB of one-time-programmable (OTP) EPROM program memory organized as 2K x 14 words, and includes 128 bytes of data RAM. It is offered in a 44-pin PLCC package with 33 digital I/O lines, making it well suited to industrial, automotive, and consumer applications requiring moderate code density. A PIC microcontroller is a family of 8-bit RISC microcontrollers built around the Harvard architecture, where program and data memories are physically separate. PIC16C-series devices typically expose 35 single-word instructions, all executing in one instruction cycle except for program branches, which take two cycles. These microcontrollers sit within the broader hierarchy: microcontroller -> MCU -> embedded processor -> semiconductor. The 'LC' prefix in PIC16LC64A denotes a low-power CMOS variant optimized for operation across 3.0 V to 5.5 V, extending battery-backed and portable use cases. Key features of the PIC16LC64A-04/L include fully static operation (allowing the clock to be stopped for sleep-mode power saving), a wide operating voltage range of 3.0 V to 5.5 V, multiple packaging options including windowed ceramic DIP for development and PLCC for production, and low typical supply currents of 15 uA at 5 V/4 MHz and 1 uA at 3 V/32 kHz. The 33 I/O pins support peripheral functions including timers, UART, and analog comparator blocks typical of the PIC16C6x family. The PIC16LC64A uses CMOS EPROM/ROM technology with a RISC architecture that completes nearly every instruction in a single cycle, yielding deterministic interrupt response. Peripherals shared with the PIC16C6x family include multiple timers, a synchronous serial port (SSP), and capture/compare/PWM modules, enabling motor control, sensor signal conditioning, and communication-front-end designs. Typical applications include industrial automation and sensor interfacing, automotive body and chassis subsystems, building automation control boards, and low-power consumer appliances. Its wide voltage range and OTP programmability make it appropriate for cost-sensitive production runs that do not need field re-programmability. When designing with this part, verify your firmware against the PIC16C6x family reference manual because the PIC16LC64A is pin- and code-compatible with siblings such as PIC16C64A and PIC16CR64A, allowing assembly reuse across product variants. Also note that the OTP variant cannot be erased; for development cycles, prefer a windowed ceramic DIP (JW) equivalent. This page synthesizes distributor pricing, package-level cross-references, and design notes that complement the Microchip datasheet by surfacing alternatives and procurement context.

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PIC16LC64A-04/P - 8-Bit 4MHz OTP MCU 3.5KB | Microchip
PIC16LC64A-04/P

PIC16LC64A-04/P - 8-Bit 4MHz OTP MCU 3.5KB | Microchip

The Microchip Technology PIC16LC64A-04/P is an 8-bit CMOS RISC microcontroller from the PIC16C family, featuring 3.5KB (2K x 14) of One-Time-Programmable (OTP) program memory, 128 bytes of RAM, and 33 digital I/O pins, housed in a 40-pin PDIP (0.600 inch, 15.24 mm) through-hole package. It operates at a maximum clock speed of 4 MHz with the -04 speed grade suffix and runs from a 3.0V to 5.5V supply. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, working RAM, and programmable I/O peripherals on one IC. The PIC16CXX family sits in the 8-bit MCU hierarchy (8-bit CPU -> RISC architecture -> Harvard architecture -> microcontroller -> embedded processor) and is engineered for low-cost, deterministic real-time control with only 35 single-word instructions. The PIC16LC64A-04/P is the low-power ('LC') CMOS variant, ideal for battery and energy-conscious designs. Key features include 35 single-word RISC instructions, single-cycle execution except for two-cycle program branches, fully static design (DC to 4 MHz clock input at this speed grade), 128 bytes of data RAM, 33 digital I/O lines, and a wide operating voltage range. The device supports commercial, industrial, and extended temperature grades in the family, with the -04/P variant typically rated for 0C to +70C commercial range. Architecturally, the PIC16C64A uses a Harvard bus topology with separate program and data paths, a 14-bit instruction word, and an 8-bit data path. The OTP program memory (EPROM-based, windowless) allows one-time field programming using standard device programmers, while the 128-byte RAM provides data scratch space for stack and variables. Watchdog timer, Power-on Reset, and brown-out protection peripherals are integrated on-chip. Typical applications include industrial control logic, appliance controllers, automotive body electronics (non-safety), sensor signal conditioning front-ends, simple user-interface boards, and low-power embedded instrumentation. The 33 I/O count and 4 MHz throughput make it suitable for moderate-complexity tasks such as keypad scanning, LED multiplexing, and UART-based communication. When designing with this MCU, account for the 4 MHz speed grade when calculating instruction cycle time (1 us per instruction at 4 MHz). Verify the erase window requirement if you migrate to the JW package variant, and ensure your programmer supports the PIC16C64A OTP device ID. The -04/P variant is the through-hole PDIP version - surface-mount alternatives exist in SOIC and PLCC packages within the same family. This page synthesizes distributor pricing, Microchip cross-reference alternatives, and practical design notes not found in the manufacturer datasheet alone.

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PIC16LC64A-04/PQ - 4MHz 8-bit OTP MCU, 3.5KB, 33 I/O | Microchip
PIC16LC64A-04/PQ

PIC16LC64A-04/PQ - 4MHz 8-bit OTP MCU, 3.5KB, 33 I/O | Microchip

The Microchip Technology PIC16LC64A-04/PQ is an 8-bit CMOS RISC microcontroller featuring 3.5KB (2K x 14) OTP program memory, 128 bytes of RAM, and 33 digital I/O pins, housed in a 44-pin MQFP (PQ) package. It executes instructions at a maximum clock rate of 4 MHz and operates from a supply voltage of 3.0 V to 5.5 V, integrating brown-out detect, power-on reset, PWM, watchdog timer, and I2C/SPI connectivity on-chip. An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data path, ROM/Flash program memory, RAM, and peripherals such as timers, ADC, and communication interfaces. Within the broader taxonomy, the PIC16LC64A belongs to the PIC16 family -> 8-bit PIC microcontrollers -> microcontrollers -> embedded processors -> semiconductors. The 'LC' prefix denotes the low-power CMOS process variant, while the 'C' suffix historically marked the OTP (One-Time-Programmable) EPROM-based core that preceded Flash PICs. PIC16C/LC devices were widely deployed in the late 1990s and early 2000s in appliances, automotive body modules, and industrial control. Key features include a RISC instruction set with only 35 single-word instructions (most single-cycle, branches two-cycle), 8-bit ALU, four interrupt sources, two 8-bit timers and one 16-bit timer/counter, and a 10-bit ADC (per datasheet family). Peripherals such as the USART, PSP (parallel slave port), and capture/compare/PWM modules make the PIC16LC64A suitable for mixed-signal embedded designs. The MQFP-44 (PQ) surface-mount package provides ample pin count for parallel bus expansion in legacy embedded systems. Typical applications include industrial control panels, HVAC thermostats, automotive body electronics, consumer appliances, and legacy remote sensor/actuator nodes. The wide 3.0-5.5 V supply range allows direct connection to 5 V logic rails used in many industrial installations, while brown-out detect and watchdog timer add reliability for unattended deployments. When designing with this device, account for the OTP memory constraint - code cannot be field-updated - and verify the 4 MHz maximum clock speed against timing requirements. Consider migrating to a Flash-based PIC16F or PIC18 successor for new designs.

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PIC16LC64A-04/PT - 8-Bit 4MHz MCU 3.5KB OTP 44-TQFP | Microchip
PIC16LC64A-04/PT

PIC16LC64A-04/PT - 8-Bit 4MHz MCU 3.5KB OTP 44-TQFP | Microchip

The Microchip Technology PIC16LC64A-04/PT is an 8-bit RISC microcontroller from the PIC16C family, housed in a 44-pin TQFP (PT) surface-mount package. It integrates 3.5KB (2K x 14) of One-Time-Programmable (OTP) program memory, 128 bytes of RAM, and 33 digital I/O pins. The core runs at up to 4MHz and the part carries the conventional PIC16C architecture with an internal RISC core and the listed 14-bit instruction word. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, data RAM, and a range of peripherals. The PIC16C family specifically targets low-cost, high-performance, fully-static 8-bit applications. The LC suffix indicates a low-power CMOS variant typically rated for 3.0V-6.0V operation, while the F suffix indicates flash. The PIC16LC64A belongs to the PIC16C mid-range sub-family, and it sits within the broader hierarchy: microcontroller -> embedded processor -> semiconductor -> integrated circuit. Key features include 33 I/O lines, an 8-bit timer/counter with 8-bit prescaler, a Watchdog Timer with its own on-chip RC, an internal oscillator option on selected parts, and synchronous/asynchronous serial port (SSP/SCI) peripherals. The LC64A is built on a fully-static CMOS process, meaning the clock can be stopped without losing internal state. Maximum supply voltage is 6V and the device supports parallel slave port for external bus interfacing, plus a capture/compare/PWM (CCP) module. Typical applications include industrial control front-ends, automotive body controllers, sensor signal conditioning, low-power remote sensor nodes, and consumer appliance interfaces. The PT (TQFP) package is suitable for space-constrained SMD designs where 33+ I/O lines are required, especially when the application needs parallel bus expansion. Designers should note the 4MHz speed grade; if higher MIPS are needed, upgrade to a -20 or -I suffix variant. Also note the OTP memory - firmware must be finalized before production, since OTP cannot be erased. For prototypes consider the JW or QFP windowed package, or the flash-based PIC16F family. The TQFP package requires standard surface-mount reflow and a PCB with adequate thermal copper for the die. This page consolidates distributor inventory, drop-in alternatives, and engineering design notes not assembled in the manufacturer datasheet alone - enabling faster sourcing decisions and side-by-side replacement analysis for engineers working with legacy PIC16C designs.

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PIC16LC64A-04I/L - 4MHz 8-Bit MCU 3.5KB OTP 44-PLCC | Microchip
PIC16LC64A-04I/L

PIC16LC64A-04I/L - 4MHz 8-Bit MCU 3.5KB OTP 44-PLCC | Microchip

The Microchip Technology PIC16LC64A-04I/L is a low-power, high-performance 8-bit CMOS microcontroller belonging to the PIC16CXX family, built using fully-static EPROM/ROM technology. It integrates 3.5KB of One-Time Programmable (OTP) program memory (2K x 14 words), 128 bytes of RAM, 33 digital I/O lines, and operates at speeds up to 4 MHz from a 2.5V to 6.0V supply in an industrial -40C to +85C temperature grade, all housed in a 44-pin PLCC (J-lead) surface-mount package measuring 16.59 mm x 16.59 mm. An 8-bit microcontroller (MCU) is a single-chip computer that contains a CPU, program memory, data RAM, and programmable I/O peripherals. The PIC16LC64A belongs to the product-type hierarchy MCU -> microcontroller -> 8-bit microcontroller -> embedded controller -> semiconductor. Its RISC instruction set uses only 35 single-word instructions with most executing in a single instruction cycle, providing deterministic timing for control loops. The wide operating voltage range allows operation directly from a 3.3V or 5V rail, and the low-power consumption (5 mA typical active at 5V/4 MHz) makes the part suitable for battery-backed or energy-conscious designs. The PIC16LC64A features a Harvard architecture with separate 14-bit program and 8-bit data buses, a 13-bit program counter capable of addressing 8K x 14 words of program memory, an 8-level hardware stack, and an integrated watchdog timer. Its built-in peripherals in this 'LC' low-power CMOS variant include timers, an analog comparator, and synchronous serial port (SSP) capability (SPI / I2C master mode). With internal RC oscillator support and power-on reset, the device can boot and run with a minimum of external components. The 44-pin PLCC (J-Lead) package provides through-hole-compatible socket assembly while still being surface-mountable on the PCB, easing prototyping and field replacement. Although the OTP ('C') program-memory version is one-time programmable, it is widely used in low-to-mid volume commercial and industrial products where code lock-in is acceptable and tooling cost for masked-ROM parts is not justified. The 'I' industrial temperature grade and 'L' PLCC package suffix are key ordering codes. Typical applications include general-purpose embedded control (appliances, HVAC, instrumentation), human-machine interface front panels, motor-driver sequencers, sensor-signal processing front-ends, RS-232/RS-485 protocol converters, and battery-powered industrial sensors. Its 33 I/O pins allow direct drive of keypads, LED arrays, and small graphic LCDs without external expanders. When designing with PIC16LC64A-04I/L, ensure that the in-circuit serial programming (ICSP) header is accessible because OTP programming must occur after PCB assembly. Decouple VDD with a 100 nF ceramic capacitor placed within 5 mm of the supply pin, and reserve a MCLR pull-up to VDD through 10 kohm if in-circuit programming is required. This page synthesizes current distributor stock, drop-in PIC16LC6X alternatives, and practical design notes that complement the Microchip datasheet and device errata for legacy PIC16C6X designs.

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PIC16LC64A-04I/P - 8-Bit 4MHz 3.5KB OTP MCU 40-PDIP | Microchip
PIC16LC64A-04I/P

PIC16LC64A-04I/P - 8-Bit 4MHz 3.5KB OTP MCU 40-PDIP | Microchip

The Microchip Technology PIC16LC64A-04I/P is an 8-bit CMOS RISC microcontroller from the PIC16C family, featuring 3.5KB (2K x 14) of One-Time-Programmable (OTP) program memory, 4 MHz maximum operating frequency, and a 40-pin PDIP (Plastic DIP) through-hole package. It belongs to the low-power LC variant supporting 3.0V to 5.5V operation and offers 22 I/O pins for general-purpose interfacing. A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory (program + RAM), and peripheral interfaces onto one die. MCUs sit at the lowest tier of embedded compute - below microprocessors (which need external memory) and embedded SoCs - and dominate applications where deterministic real-time control, low power, and low cost matter more than raw throughput. The PIC16C family uses a Harvard RISC architecture with a fixed 14-bit instruction word, only 35 single-word instructions, and single-cycle execution (program branches take two cycles), giving a 4 MHz oscillator up to 1 MIPS of predictable throughput. Key features of the PIC16LC64A-04I/P include 128 bytes of RAM, an integrated analog comparator, a Watchdog Timer with on-chip RC oscillator, power-saving Sleep mode, in-circuit serial programming capability via two pins, and a programmable code-protection mechanism. The OTP program memory allows one-time field programming, making the part suited for production volumes where firmware is stable and flash reprogrammability is not required. Architecturally, the device uses an enhanced PIC16C6X core with separate program and data buses, a 13-bit program counter capable of addressing 8K x 14 of program space, and a file-register architecture of 128 x 8 general-purpose RAM plus special-function registers. The 22 I/O pins are arranged in ports A (6), B (8), C (8) for digital I/O, with several pins multiplexed to peripherals such as the USART (SCI/SPI), timers, and the analog comparator. Typical applications include low-cost industrial control subsystems, appliance controllers, automotive body electronics (non-safety), sensor signal conditioning front-ends, and legacy embedded products still in service. Its wide 3.0V to 5.5V operating range, low-power consumption (15 uA typical at 5V/4 MHz, 1 uA typical at 3V/32 kHz), and OTP memory make it well-suited for sealed, high-volume, cost-sensitive designs. A primary design consideration when using OTP is that firmware bugs cannot be patched in the field. Engineers should prototype on a windowed CERDIP variant (PIC16C64A-04I/P) or a Flash sibling (PIC16F64A family) before committing to OTP for production. This page synthesizes distributor pricing, OTP vs Flash sibling variants, and design considerations for the PIC16LC64A-04I/P beyond the manufacturer datasheet.

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PIC16LC64A-04I/PQ - 8-Bit 4MHz MCU, 3.5KB OTP, 44-MQFP | Microchip
PIC16LC64A-04I/PQ

PIC16LC64A-04I/PQ - 8-Bit 4MHz MCU, 3.5KB OTP, 44-MQFP | Microchip

The Microchip Technology PIC16LC64A-04I/PQ is an 8-bit CMOS RISC microcontroller from the PIC16C family, featuring a 4 MHz maximum clock, 3.5 KB (2K x 14) of One-Time Programmable (OTP) program memory, 128 bytes of on-chip data RAM, and 33 digital I/O pins, all housed in a 44-pin MQFP (10x10 mm) surface-mount package. A PIC (Peripheral Interface Controller) microcontroller is a class of compact, Harvard-architecture microcontrollers built around a small RISC instruction set with integrated program memory, data RAM, and peripherals on a single die. PIC microcontrollers sit within the broader hierarchy of microcontrollers -> embedded microcontrollers -> semiconductors, and the PIC16 family specifically targets mid-range 8-bit applications requiring more I/O and peripheral mix than entry-level PIC10/12 devices. The 'LC' suffix indicates a low-voltage CMOS variant (typically 3.0V to 5.5V operation) optimized for reduced power consumption, while the 'A' revision denotes an enhanced silicon revision over the original PIC16C64. Key features include an 8-level hardware stack, 14-bit wide instruction word, 8-bit data path, an integrated 8-bit timer/counter (TMR0), a 16-bit timer/counter (TMR1), a 8-bit timer with PWM (TMR2), a USART/SCI serial port, an SPI/I2C compatible Synchronous Serial Port (SSP), a 10-bit multi-channel Analog-to-Digital Converter (ADC), and on-chip brown-out reset and power-on reset circuitry. The 33 I/O lines can source/sink up to 25 mA per pin, enabling direct LED and small-solenoid drive without buffering. The PIC16LC64A uses a two-stage pipeline RISC architecture with 35 single-word instructions, most executing in a single instruction cycle (4 oscillator clocks). At 4 MHz clock the instruction cycle is 1 microsecond, yielding roughly 5 MIPS per MHz sustained throughput. This deterministic instruction-cycle timing simplifies real-time control loops in encoder or motor-control firmware. The 4 MHz oscillator rating reflects the '-04' speed grade; the internal oscillator is not used in the 44-MQFP variant - the part expects an external crystal, resonator, or RC clock source up to 25 MHz when operated at extended VDD. Typical applications include industrial control panels, HVAC damper/valve actuators, appliance user-interface boards, automotive body controllers (non-AEC-Q100), instrumentation front ends, and embedded remote-sensor nodes. The 33 I/O and 10-bit ADC are well-matched to keypad scan plus analog signal acquisition tasks, while the USART enables wired RS-232/RS-485 host links. The low-voltage 'LC' silicon is particularly suited to battery-backed or 3.3V-powered designs that still need PIC16 mid-range peripheral richness. When designing with this part, allocate one of the four oscillator pins correctly for the crystal/RC network and ensure the MCLR pin is tied to VDD through the recommended 10 kOhm pull-up or driven by the system reset supervisor. The OTP memory cannot be erased - choose the PIC16F64 or PIC16LF1847 Flash variant if you need in-system re-programmability during prototyping. This page synthesizes distributor pricing, parametric comparison with same-package PIC16 variants, and practical design notes not consolidated on the manufacturer datasheet, helping engineers evaluate the PIC16LC64A-04I/PQ for new designs and direct cross-reference searches.

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PIC16LC64A-04I/PT - 8-Bit 4MHz MCU 3.5KB OTP 44-TQFP | Microchip
PIC16LC64A-04I/PT

PIC16LC64A-04I/PT - 8-Bit 4MHz MCU 3.5KB OTP 44-TQFP | Microchip

The Microchip Technology PIC16LC64A-04I/PT is a low-power CMOS 8-bit microcontroller from the PIC16C family, delivering 4 MHz maximum clock speed with 3.5 KB (2K x 14) of One-Time Programmable (OTP) program memory and 128 bytes of RAM in a 44-pin TQFP package. It exposes 33 digital I/O lines and integrates I2C and SPI connectivity peripherals, plus a 10-bit analog-to-digital converter for mixed-signal embedded designs. A PIC microcontroller is a compact computer-on-a-chip based on a RISC (Reduced Instruction Set Computer) Harvard architecture, integrating CPU core, non-volatile program memory, working RAM, peripherals, and I/O into a single IC. Within the embedded hierarchy, PIC16C sits between baseline PIC10/PIC12 8-pin controllers and PIC18/PIC24 16-bit devices, targeting mid-range control tasks that need more code space and I/O than entry-level MCUs. The PIC16C6X family uses OTP program memory rather than Flash, which keeps die cost low but requires mask-programmed or windowed devices for volume production and limited in-circuit reprogrammability. Key differentiating specifications include 4 MHz maximum operating frequency, 35 single-word instructions with single-cycle execution (except program branches), 8-bit-wide data path, and an industrial-grade -40C to +85C operating temperature range as denoted by the 'I' suffix. The 128-byte RAM and 33 I/O pins enable rich sensor interfacing, while I2C/SPI connectivity supports peripheral expansion. The '04' speed grade limits the oscillator to 4 MHz, suiting low-EMI, deterministic control loops. Architecture-wise, the PIC16C6X core uses a 14-bit instruction word with separate program and data buses (Harvard), enabling simultaneous fetch and access. The device supports DC to 4 MHz clock input across 2.5V-5.5V supply, with internal brown-out reset, watchdog timer, and power-on reset. The 10-bit ADC multiplexes across multiple channels, sharing pins with digital I/O. Typical applications include industrial automation controllers, white-goods user interfaces, motor-control front-ends, automotive body electronics (non-safety), HVAC thermostat logic, and battery-powered sensor hubs. The 33 I/O and 3.5 KB OTP make it well-suited for fixed-function appliances where the firmware is finalized before mask programming. Design consideration: OTP memory cannot be field-updated, so provisioning firmware-update paths requires either mask ROM equivalents or migrating to a Flash-based PIC16F7x pin-compatible successor. Plan for socketed prototypes during firmware bring-up. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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PIC16LC64AT-04/L - 8-Bit 4MHz OTP MCU, 3.5KB | Microchip
PIC16LC64AT-04/L

PIC16LC64AT-04/L - 8-Bit 4MHz OTP MCU, 3.5KB | Microchip

The Microchip Technology PIC16LC64AT-04/L is an 8-bit RISC microcontroller from the PIC16C family, featuring 3.5KB (2K x 14) of One-Time-Programmable (OTP) program memory, 128 bytes of RAM, and a maximum clock speed of 4 MHz, housed in a 44-pin PLCC package measuring 16.59 x 16.59 mm. The "LC" suffix denotes the low-voltage CMOS variant supporting 3.0V to 5.5V operation, while the "T" indicates tape-and-reel packaging and "-04" specifies the 4 MHz speed grade. The device integrates 33 digital I/O lines, a 5-channel 8-bit ADC, two 8-bit timers and one 16-bit timer, plus a Watchdog Timer, Brown-out Reset, and Power-on Reset. Communication peripherals include I2C (Master/Slave) and SPI (Master/Slave) interfaces, with PWM, capture, and compare modules also available. What is a PIC16C microcontroller? PIC16C is a family of low-cost, high-performance, CMOS, fully-static 8-bit microcontrollers from Microchip Technology built on a Harvard RISC architecture. Within the broader taxonomy, PIC16C sits below PIC18/PIC24 as a mid-tier 8-bit MCU, which itself belongs to the microcontroller (MCU) class of integrated circuits, then to embedded processors, and finally to the broader semiconductor device category. The PIC16C series uses a RISC instruction set of only 35 single-word instructions, where all instructions execute in a single cycle except program branches which take two cycles. The LC sub-family specifically targets battery-powered and low-voltage applications where 3.3V rails are common, distinguishing it from the standard PIC16C64A which requires 4.0V minimum. Key features include 2K x 14 (3.5KB) OTP program memory that can be written only once, a programmable code protection mechanism, an in-circuit serial programming (ICSP) interface, and a power-saving SLEEP mode. The PIC16C64A core provides eight hardware interrupt sources and a four-deep hardware stack. The LC variant typically draws less than 5 mA active current at 5V and under 20 µA in SLEEP, making it well-suited to mains-powered and battery-backed industrial control applications. Operating temperature ranges from -40 °C to +85 °C for the industrial grade. Architecturally, the PIC16LC64A uses a 14-bit-wide instruction word with an 8-bit-wide data path, allowing most operations to complete in a single instruction cycle (200 ns at 20 MHz external oscillator). The integrated ADC has 8 channels with 8-bit resolution and supports both single-ended and differential conversions. The PIC16LC64A also includes a USART for asynchronous serial communication, distinguishing it from the older PIC16C64 which lacks this peripheral. Typical applications include industrial control systems, appliance controllers, automotive body electronics, smart sensor interfaces, and low-power remote sensor nodes. The wide operating voltage (3.0V to 5.5V) and 22+ I/O pins make it suitable for moderate-complexity embedded designs. When migrating from PIC16C64A designs, note that the LC variant operates down to 3.0V but otherwise shares the same peripherals and pinout. Designers should consult the Microchip PIC16C6X datasheet (DS30262D family) for full peripheral specifications. For design, ensure decoupling capacitors of 0.1 µF are placed within 5 mm of each VDD/VSS pair. A series resistor on MCLR is recommended when using ICSP to limit inrush current. The OTP memory means firmware revisions require physical part replacement; for development, use a JW (windowed) or F (Flash) variant. This page synthesizes distributor pricing, drop-in pin-compatible alternatives, and practical design notes not found in the manufacturer datasheet alone.

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PIC16LC64AT-04/PT - 8-bit PIC MCU, 3.5KB OTP, 4MHz | Microchip
PIC16LC64AT-04/PT

PIC16LC64AT-04/PT - 8-bit PIC MCU, 3.5KB OTP, 4MHz | Microchip

The Microchip Technology PIC16LC64AT-04/PT is an 8-bit RISC microcontroller built on low-power, high-speed CMOS EPROM/ROM technology, offering 3.5KB (2K x 14) of program memory and 128 bytes of RAM in a 44-pin TQFP (PT) surface-mount package. The device runs at 4 MHz using an external oscillator and operates across a wide 3.0 V to 6.0 V supply range, supporting Commercial, Industrial, and Extended temperature grades. Tape-and-reel packaging (TR) is standard for this factory-programmed (T suffix) variant. An 8-bit microcontroller (MCU) is a small, self-contained computer-on-a-chip that integrates a CPU, non-volatile program memory (ROM/EPROM/Flash), peripherals (timers, A/D, communication) and I/O onto a single die. Within the broader taxonomy, an MCU is a subset of microprocessors (MPU) and is itself a type of embedded controller in the semiconductor hierarchy: microcontroller -> embedded processor -> IC. PIC16-series parts use Microchip's enhanced Harvard RISC architecture, with separate program and data buses allowing simultaneous instruction fetch and operand access. Key features include 33 digital I/O lines, a fully static design that allows the clock to be stopped without losing state, low-power CMOS process technology, and compatibility with the PIC16C6X family instruction set. The 4 MHz maximum clock and 14-bit instruction word are characteristic of mid-1990s PIC16 mid-range devices, optimized for deterministic interrupt response and low power rather than raw compute throughput. Internal peripherals documented in the PIC16CXX family datasheet include timers, capture/compare/PWM modules, an analog comparator, and synchronous/asynchronous serial ports. Typical applications include industrial control systems, automotive body electronics (within the extended temperature range), appliance control, sensor interface front-ends, and legacy embedded products requiring long-life-cycle 8-bit controllers. The wide operating voltage window (3.0 V to 6.0 V) also supports battery-backed designs and unregulated supply rails common in white-goods and HVAC equipment. When designing with this MCU, verify that code-size requirements fit within the 2K x 14 program memory and that the 33 I/O pins plus any oscillator/master-clear pins match the application's PCB layout. OTP (one-time programmable) devices cannot be re-programmed, so secure code images must be locked into the part at the programming house. This page synthesizes verified distributor pricing, drop-in alternative listings, and engineering design notes not aggregated on the manufacturer datasheet, helping engineers and procurement teams evaluate the PIC16LC64AT-04/PT against legacy PIC16C6X family members and modern PIC16F successors.

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PIC16LC64AT-04I/L - 8-bit OTP MCU, 4MHz, 3.5KB, 44-PLCC | Microchip
PIC16LC64AT-04I/L

PIC16LC64AT-04I/L - 8-bit OTP MCU, 4MHz, 3.5KB, 44-PLCC | Microchip

The Microchip Technology PIC16LC64AT-04I/L is an 8-bit RISC microcontroller from the PIC16C family, featuring 4 MHz maximum clock speed, 3.5 KB (2K x 14) of One-Time Programmable (OTP) program memory, 128 bytes of RAM, and 33 I/O pins housed in a 44-pin PLCC (J-Lead) package. The 'LC' suffix indicates a low-voltage CMOS variant optimized for 3.0 V to 5.5 V operation, while the 'T' suffix denotes a tape-and-reel packaging option and 'I' indicates the industrial operating temperature grade (-40C to +85C). The 'L' suffix in this part number denotes the 44-PLCC package. A PIC (Peripheral Interface Controller) microcontroller is a compact, self-contained computer-on-a-chip that integrates a CPU, memory, and peripherals into a single IC. The PIC16C family is part of Microchip's mid-tier 8-bit MCU lineup, sitting between the baseline PIC10/12/16 families and the higher-end PIC18 family. These MCUs use a Harvard architecture with separate program and data buses, enabling single-cycle instruction execution for most opcodes. Within the broader taxonomy, an 8-bit MCU is a type of microcontroller -> embedded processor -> semiconductor IC. Key features include 35 single-word instructions (only 14-bit wide), single-cycle operation on all instructions except branches (which take two cycles), DC to 20 MHz operating speed, an 8-level hardware stack, and integrated I2C and SPI synchronous serial communication peripherals. The PIC16LC64A also integrates a watchdog timer, up to four timer modules, and a Capture/Compare/PWM (CCP) module, providing flexible embedded control for cost-sensitive applications. The PIC16LC64A core uses a RISC-based architecture with a 14-bit instruction word and 8-bit data path, achieving approximately 5 MIPS performance at 20 MHz. The integrated peripherals include a 10-bit (approximate) ADC, USART, I2C, SPI, and multiple timer/counter modules. The CMOS process delivers low power consumption with typical active current around 2-5 mA at 4 MHz, making it suitable for both battery-powered and line-powered designs. Typical applications include industrial control systems, consumer appliance control, automotive body electronics (non-safety), sensor signal conditioning, and low-cost embedded control where deterministic 8-bit processing is sufficient. The OTP program memory allows prototype-to-production migration with one-time-programmed code, lowering per-unit cost versus flash-based alternatives. When designing with this MCU, ensure the oscillator configuration is correctly selected (RC, XT, HS, or LP) to match the clock source, and that brown-out reset (BDR) is properly enabled for robust startup. The 44-PLCC package provides socket-friendly through-hole compatibility for prototyping and field-serviceable legacy systems. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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PIC16LC64AT-04I/PQ - 8-Bit PIC MCU, 4MHz, 3.5KB OTP, 44-MQFP
PIC16LC64AT-04I/PQ

PIC16LC64AT-04I/PQ - 8-Bit PIC MCU, 4MHz, 3.5KB OTP, 44-MQFP

The Microchip Technology PIC16LC64AT-04I/PQ is an 8-bit PIC microcontroller from the PIC16C family, operating at 4MHz with 3.5KB (2K x 14) of One-Time Programmable (OTP) program memory, packaged in a 44-pin MQFP (10x10 mm) surface-mount form factor. The 'LC' suffix denotes the low-voltage CMOS variant designed for 3.0V-5.5V operation, while the 'T' indicates tape-and-reel packaging and 'I' specifies the industrial temperature range (-40C to +85C). An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory (ROM/Flash/OTP), data memory (RAM), and peripheral interfaces on one die. Within the broader taxonomy, the PIC16LC64A belongs to the PIC16 mid-range family -> PIC16C sub-family -> OTP-based PIC16C6X series -> PIC16LC6X low-voltage CMOS series -> 8-bit microcontroller -> microcontroller unit -> embedded controller -> semiconductor IC. The PIC architecture is a Harvard RISC design with 35 single-word instructions and single-cycle execution (except program branches which take two cycles). Key features include 128 bytes of RAM, 33 digital I/O pins, integrated peripherals such as PWM modules, Watchdog Timer (WDT), Brown-out Reset (BOR), Power-on Reset (POR), a synchronous serial port (SSP) supporting SPI/I2C, and a capture/compare/PWM (CCP) module. The core delivers deterministic 4MHz operation at 3.0V-5.5V, suitable for low-power battery-fed designs and industrial control loops. The 44-MQFP package provides compact board area while exposing the full peripheral set through dedicated pins. The PIC16LC64A uses a modified Harvard architecture with separate program and data buses, enabling simultaneous instruction fetch and data access. Its CMOS process and static design allow operation down to DC clock frequencies, and the integrated oscillator supports crystal, resonator, or external clock sources. The OTP program memory supports one-time programming, making this part cost-optimized for high-volume production where firmware is finalized. Typical applications include industrial automation controllers, sensor interface modules, motor control peripherals, low-power consumer appliances, and embedded control subsystems requiring a low pin count with mid-range analog/digital integration. The wide operating voltage and industrial temperature grade suit automotive under-hood and factory-floor installations. When designing with this MCU, ensure the configuration bits are set correctly to select the oscillator mode and disable unneeded peripherals to minimize quiescent current. The OTP memory is one-time programmable, so firmware must be fully validated before committing to production. This page synthesizes distributor pricing, lifecycle status, drop-in alternatives within the 44-MQFP footprint, and practical engineering guidance not consolidated in the manufacturer datasheet alone.

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PIC16LC65A-04/P - 8-Bit 4MHz 7KB OTP MCU | Microchip | DIP-40
PIC16LC65A-04/P

PIC16LC65A-04/P - 8-Bit 4MHz 7KB OTP MCU | Microchip | DIP-40

The Microchip PIC16LC65A-04/P is an 8-bit CMOS RISC microcontroller built around the PIC16 core, integrating 7KB (4K x 14) of One-Time-Programmable (OTP) program memory and 192 bytes of RAM in a 40-pin PDIP (DIP-40, 0.600 inch / 15.24 mm) through-hole package. It operates from a 3.0V to 5.5V supply and supports a maximum oscillator frequency of 4 MHz at this speed grade. A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory, and programmable I/O peripherals. The PIC16C/LC family belongs to the broader 8-bit microcontroller category, which sits under the embedded computing -> semiconductor device hierarchy. LC variants are designed for low-voltage operation (down to ~2.5-3.0V), making them suitable for battery-powered designs where 'LC' stands for Low-power CMOS. Key features include 33 digital I/O lines, an 8-channel 8-bit ADC, two 8-bit timers and one 16-bit timer, a USART for serial communication, a Capture/Compare/PWM (CCP) module, and a watchdog timer with its own on-chip RC oscillator for maximum reliability. The architecture is fully static, uses a Harvard design with separate program and data buses, and offers 35 single-word instructions where all instructions execute in a single cycle except program branches (two cycles). The 4 MHz speed grade (the '-04' suffix) corresponds to a 4 MHz oscillator input with a 1 microsecond instruction cycle, balancing throughput and power consumption. The 40-pin PDIP form factor is the classic through-hole industrial/Educational/Maker-friendly footprint, ideal for breadboards, IC sockets, legacy upgrades, and test fixtures where mechanical robustness matters more than board area. Typical applications include industrial control front-ends, appliance controllers, instrumentation subsystems, low-power sensor nodes, and educational development boards. The OTP memory suits volume production where the firmware is fixed and field-reprogramming is not required; for flash-based flexibility, the PIC16F-series is the typical upgrade path. When designing with this MCU, account for the OTP memory limitation by using a UV-erasable windowed (JW) variant for prototype development, then migrating to the OTP 'P' package for production. Ensure your in-circuit emulator or programmer (e.g., PICSTART Plus, MPLAB PM3) supports the LC low-voltage range before committing to a hardware platform. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.

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