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PIC16C66T-20I/SO - 8-Bit 20MHz MCU 14KB OTP 28-SOIC | Microchip
PIC16C66T-20I/SO

PIC16C66T-20I/SO - 8-Bit 20MHz MCU 14KB OTP 28-SOIC | Microchip

The Microchip Technology PIC16C66T-20I/SO is an 8-bit RISC microcontroller from the PIC16CXX family, operating at up to 20 MHz with 14KB (8K x 14) of One-Time Programmable (OTP) program memory, housed in a 28-pin SOIC (SO) package. It integrates 368 bytes of RAM, 22 digital I/O pins, and three serial communication peripherals: I2C (MSSP), SPI, and UART/USART. The "T" suffix denotes tape-and-reel packaging and the "I" suffix indicates the industrial temperature grade (-40C to +85C). A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory, working RAM, and programmable I/O peripherals. The PIC16C66 belongs to Microchip's mid-range PIC family, which uses a Harvard RISC architecture with 35 single-word instructions and a 14-bit program word. In the broader taxonomy, MCUs sit within semiconductors -> microcontrollers -> 8-bit microcontrollers -> PIC16CXX family -> PIC16C6X sub-family. Most instructions execute in a single 200 ns instruction cycle at 20 MHz, while program branches take two cycles, yielding deterministic timing suitable for embedded control. Key features of the PIC16C66T-20I/SO include three timer/counter modules (Timer0, Timer1, and Timer2), a 5-channel 8-bit ADC, an analog comparator, a capture/compare/PWM (CCP) module, and a watchdog timer with its own on-chip RC oscillator. The device operates from 4.5V to 5.5V, has 22 I/O lines capable of sinking up to 25 mA for direct LED drive, and supports in-circuit serial programming (ICSP) through RB6/RB7. The PIC16C66 architecture combines a RISC CPU with a unified 14-bit instruction word, allowing efficient code density and predictable interrupt latency. Its OTP program memory is programmed once at production and cannot be erased, making the part ideal for mature, high-volume, cost-sensitive products where firmware is frozen. Per Microchip's pin and code compatibility chart, the PIC16C66 is pin-compatible with other members of the PIC16C6X family in the 28-pin SPDIP/SOIC package. Typical applications include industrial control subsystems, appliance controllers, sensor interfaces, automotive body electronics (non-safety), instrumentation front-ends, and consumer device main boards. Industrial automation is a strong fit thanks to the 22 strong I/O lines, three serial interfaces, and -40C to +85C operating range. When designing with this part, ensure that in-circuit programming lines (RB6/RB7) are accessible and that decoupling is placed within a few millimetres of VDD. Choose the PIC16F66 instead if you need Flash memory and in-field reprogrammability; the PIC16C66 OTP is final. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes for the PIC16C66T-20I/SO not found in the manufacturer datasheet alone.

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PIC16C67-04/L - 8-Bit 4MHz 14KB OTP MCU | Microchip | PLCC-44
PIC16C67-04/L

PIC16C67-04/L - 8-Bit 4MHz 14KB OTP MCU | Microchip | PLCC-44

The Microchip Technology PIC16C67-04/L is an 8-bit CMOS OTP (One-Time Programmable) RISC microcontroller operating at up to 4 MHz instruction rate, with 14 KB (8K x 14) of program memory and 368 bytes of SRAM, housed in a 44-pin PLCC package. It is part of Microchip's PIC16C6x mid-range family and features 33 digital I/O lines, a 5-channel 8-bit ADC, two capture/compare/PWM modules, a USART, and a synchronous serial port. A microcontroller (MCU) is a single-chip computer containing a processor core, memory, and programmable I/O peripherals. The PIC16C family sits within the 8-bit microcontroller hierarchy: MCU -> 8-bit MCU -> PIC -> PIC16 mid-range -> PIC16C6x OTP family. It is designed for embedded control applications where deterministic instruction timing, low power, and simple peripheral integration are prioritized over raw processing throughput. Key features of the PIC16C67-04/L include 35 single-cycle instructions (200 ns per instruction at 20 MHz oscillator, 1 us at 4 MHz), a wide operating voltage range of 2.5 V to 6.0 V, and three operating temperature grades: commercial, industrial, and extended. The device uses Harvard architecture with separate program and data buses, allowing instruction fetch to occur in parallel with operand access. It draws only 15 uA typical at 5 V / 4 MHz and 1 uA typical at 3 V / 32 kHz, making it suitable for battery-backed or sleep-dominant designs. Typically applied in industrial control front-ends, automotive body electronics, sensor signal conditioning, and embedded instrumentation, the PIC16C67-04/L was widely adopted in the late 1990s and early 2000s as a workhorse OTP MCU. Its OTP memory is one-time programmable and cannot be erased, so this part is intended for high-volume production where firmware is final and field updates are not required. When designing with this part, verify OTP memory constraints for your firmware revision strategy early in the project. For prototypes or products requiring field updates, choose a Flash-based PIC16F equivalent. The 44-pin PLCC footprint is socketable, which simplifies development lab programming and final assembly.

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PIC16C67-04/P - 8-Bit 4MHz 14KB OTP MCU 40-PDIP | Microchip
PIC16C67-04/P

PIC16C67-04/P - 8-Bit 4MHz 14KB OTP MCU 40-PDIP | Microchip

The Microchip Technology PIC16C67-04/P is an 8-bit CMOS microcontroller built on the PIC16C6X RISC core, delivering 4 MHz operation from 14 KB of one-time-programmable (OTP) program memory in a 40-pin PDIP (0.600 inch, 15.24 mm) through-hole package. It integrates 368 bytes of RAM, 33 digital I/O lines, and a Harvard bus architecture that executes a single instruction per 200 ns cycle using only 35 single-word instructions. The part combines the PIC16C66 peripheral set (USART, MSSP/SPI/I2C, capture/compare/PWM, 8-channel 8-bit ADC) and is targeted at high-performance yet low-cost embedded applications. According to the manufacturer datasheet, the family shares a wide operating voltage range up to 6.0 V and supports commercial, industrial, and extended temperature grades, with low-power consumption rated at 15 µA typical at 5 V / 4 MHz and 1 µA typical at 3 V / 32 kHz. What is a PIC16C6X microcontroller? The PIC16C6X family is a low-cost, high-performance, CMOS, fully-static, 8-bit microcontroller series based on Microchip's PIC RISC architecture. Positioned in the taxonomy, it belongs to the PIC16 mid-range family, which sits between the baseline PIC10/12/16 and the enhanced PIC17/18 architectures; within the broader microcontroller -> embedded MCU -> semiconductor hierarchy, these OTP-EPROM devices serve as one-time programmable alternatives to flash-based PIC16F counterparts, preserving pin-for-pin compatibility with the flash variants. Key features include a Harvard bus, single-cycle instruction execution at 4 MHz, 14 interrupt sources with on-chip peripherals, an 8-bit successive-approximation ADC with up to eight input channels, a USART for serial communication, and a master SSP supporting both SPI and I2C. The 8-level hardware stack and 15 special-function hardware registers are mapped into the data memory map. The PIC16C67-04/P uses a low-power, high-speed CMOS EPROM/ROM process with a fully static design that allows the clock to be stopped without losing register state. With a 14-bit instruction word, 8-bit data path, and 200 ns instruction cycle at 4 MHz, it achieves roughly 5 MIPS throughput, which historically was sufficient for motor control, instrumentation, and consumer product designs. Typical applications include industrial control systems, white goods and appliance controllers, automotive body electronics (pre-CAN era), smart sensor nodes, and battery-powered instrumentation where the 1 µA standby current enables long-life operation. Designers chose this part when code lock or OTP security was preferred over flash reprogrammability. When designing with the PIC16C67-04/P, plan for OTP programming: code must be verified before production programming because OTP cannot be erased. Always provide a decoupling capacitor within 5 mm of VDD/VDD2 pins and reserve a 4-pin ICSP header for production programming. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.

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PIC16C67-04/PQ - 8-Bit 4MHz 14KB OTP MCU | Microchip
PIC16C67-04/PQ

PIC16C67-04/PQ - 8-Bit 4MHz 14KB OTP MCU | Microchip

The Microchip Technology PIC16C67-04/PQ is an 8-bit CMOS microcontroller from the PIC16C6x family, delivering 4 MHz CPU performance with 14 KB (8K x 14) of One-Time-Programmable (OTP) EPROM program memory and 368 bytes of RAM, housed in a 44-pin MQFP (10x10 mm) package. It features 33 digital I/O pins, a RISC architecture with only 35 single-word instructions, and a fully static design that supports DC to 4 MHz clock operation. The device is fabricated using low-power, high-speed CMOS EPROM/ROM technology and operates from a wide supply voltage range. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, memory (ROM/Flash and RAM), and peripheral interfaces on one die. PIC microcontrollers from Microchip use a Harvard RISC architecture that executes one instruction per clock cycle (except program branches), delivering deterministic throughput for embedded control. Within the power-management and embedded-control hierarchy, MCUs sit above discrete logic and below DSPs/SoCs; the PIC16C6x mid-range family targets cost-sensitive, general-purpose embedded designs where deterministic timing, low power, and ease of programming outweigh raw computational throughput. Key features of the PIC16C67-04/PQ include low-power consumption of 15 microamps typical at 5V/4 MHz and 1 microamp typical at 3V/32 kHz, a wide operating voltage range up to 6.0V, and commercial, industrial, and extended temperature variants. The 33 I/O pins share peripherals such as timers, a synchronous serial port (SSP) supporting SPI/I2C, a USART, capture/compare/PWM modules, and an 8-bit ADC, making it suitable for mixed-signal embedded products. Power management includes power-on reset, brown-out detection, watchdog timer with on-chip RC oscillator, and code protection. Architecturally, the PIC16C67-04 uses a 14-bit instruction word with an 8-bit data path, a 13-bit program counter capable of addressing 8K words, and a two-level deep hardware stack. The OTP EPROM cell allows one-time field programming using a standard EPROM programmer; for prototype volume production the windowed JW variant enables UV erasure. This combination of deterministic execution, generous on-chip peripherals, and legacy-compatible tooling explains why the PIC16C67 family remains a baseline reference in many industrial and automotive subsystems designed in the 1990s. Typical applications include industrial control subsystems, HVAC fan and damper controllers, automotive body electronics (climate, lighting, seat modules), instrumentation front-ends, security panel keypads, and small consumer appliances. Designers also use it for board-level glue logic replacement where 20-30 discrete logic ICs can be consolidated into a single programmed MCU, reducing BOM cost and PCB area. When designing with the PIC16C67-04/PQ, remember that OTP memory can be programmed only once; for prototyping, use the PIC16C67-04/JW windowed variant or migrate to a Flash-based PIC16F877 in the same 44-pin QFP footprint. The maximum clock rate is 4 MHz for the -04 speed grade; for higher throughput in the same package, use the -10 or -20 speed grades. Always verify OTP programmer socket adapter compatibility for MQFP-44 packages. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not consolidated on a single manufacturer page. Cross-references are anchored to the Microchip PIC16C6x datasheet and DigiKey/Mouser listing data.

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PIC16C67-04/PT - 8-bit MCU, 14KB OTP, 4MHz, 44-TQFP | Microchip
PIC16C67-04/PT

PIC16C67-04/PT - 8-bit MCU, 14KB OTP, 4MHz, 44-TQFP | Microchip

The Microchip PIC16C67-04/PT is an 8-bit RISC microcontroller from the PIC16C6x family, featuring 14KB (8K x 14) one-time-programmable EPROM program memory, 368 bytes of RAM, and 33 digital I/O pins, housed in a 44-pin TQFP surface-mount package. It operates at up to 4 MHz clock speed with a wide 2.5V to 6.0V supply range and is built on Microchip's low-power, high-speed CMOS EPROM/ROM technology with a fully static design. The device is part of the PIC® 16C mid-range family and supports Commercial, Industrial, and Extended temperature grades. What is a microcontroller? A microcontroller (MCU) is a single-chip computer containing a processor core, program memory, working RAM, I/O peripherals, and timers. Within the broader taxonomy it sits between microprocessors and system-on-chips (SoCs); an 8-bit MCU like the PIC16C67 trades absolute throughput for deterministic behavior, low cost, and ultra-low power draw. The PIC16C6x family in particular uses Harvard architecture with separate program and data buses, RISC instruction set, and OTP/EPROM/ROM program memory options. This makes MCUs like the PIC16C67-04/PT suitable for embedded control tasks where reliability and simplicity outweigh raw compute. Key features include 14KB EPROM program memory (8K x 14 word width), 368 bytes of data RAM, 33 I/O pins across five ports, three timers, a USART, an MSSP module supporting SPI and I2C, an 8-bit ADC with 8 channels, and a watchdog timer. The /04 speed grade designates a 4 MHz maximum oscillator input, while the /PT suffix indicates the 44-pin TQFP (Thin Quad Flat Pack) package delivered in tray packaging. Pin count and memory size make this device one of the largest members of the PIC16C6x generation. Architecturally, the PIC16C67 uses a 14-bit instruction word and a 35-instruction RISC set, allowing most instructions to execute in a single clock cycle (250 ns at 4 MHz). The Harvard bus separates program fetches from data accesses so the CPU can pre-fetch the next instruction while reading data, improving throughput without pipelining. Brown-out reset (BOR), power-on reset (POR), and the watchdog timer provide robustness in electrically noisy industrial environments. Typical applications include industrial control subsystems, automotive body and chassis electronics (pre-CAN era designs), HVAC controls, appliance controllers, instrumentation front-ends, and embedded sensor conditioning where 33 I/O lines, three timers, and a built-in ADC reduce external component count. Designers also use it for upgrading legacy 8051 designs that need simpler firmware and lower power. When designing with this part, plan for OTP programming: firmware bugs cannot be patched in-circuit, so emulator or windowed-ceramic-DIP samples should be used for development. Decoupling caps (0.1 uF plus 10 uF bulk) should be placed within 5 mm of VDD/VSS pins. Because the device is in a legacy product family, check Microchip's lifecycle page before committing to a long-life program.

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PIC16C67-04E/P - 8-Bit 4MHz 14KB OTP MCU 40-PDIP | Microchip
PIC16C67-04E/P

PIC16C67-04E/P - 8-Bit 4MHz 14KB OTP MCU 40-PDIP | Microchip

The Microchip Technology PIC16C67-04E/P is an 8-bit RISC microcontroller from the PIC16C6X family, featuring 14KB (8K x 14) of One-Time-Programmable (OTP) EPROM program memory, 368 bytes of RAM, and 33 digital I/O pins in a 40-pin PDIP through-hole package with automotive temperature grade (-40C to +125C). Operating from a 4.5V to 5.5V supply, the device runs at 4 MHz clock input with a 200 ns single-cycle instruction time and is fully static, allowing DC to maximum clock operation. An 8-bit microcontroller (MCU) is a small computer-on-a-chip integrating a CPU, program memory (ROM/EPROM/Flash), data memory (RAM), and peripherals into a single IC. Within the broader semiconductor taxonomy, MCUs sit under microcontrollers, which are a sub-category of integrated circuits, which themselves belong to the logic IC family in power management and embedded system hierarchies. The PIC16C6X family specifically uses a Harvard-architecture RISC core with only 35 single-word instructions, making it one of the easiest assembly languages for embedded engineers to learn. Key features include 8-bit core width, 4 MHz maximum clock, 14KB OTP program memory (8K x 14 words), 368 bytes of data RAM, 33 I/O pins, three timer/counter modules, a 10-bit (approximate, depending on revision) ADC with multiple channels, and integrated peripherals including Universal Synchronous/Asynchronous Receiver-Transmitter (USART), Serial Peripheral Interface (SPI), and Inter-Integrated Circuit (I2C) for serial communication. Brown-out Reset (BOR), Power-on Reset (POR), and Watchdog Timer (WDT) are standard. The architecture uses CMOS EPROM technology with a Harvard-style separate program and data bus, single-cycle instruction execution (200 ns at 20 MHz), and two-cycle branches. The "-04" speed suffix denotes 4 MHz maximum clock input; the "-04" variant is the lower-speed grade, with "-10" (10 MHz), "-20" (20 MHz) being other grades. The "E" suffix indicates the extended automotive temperature range (-40C to +125C), and "/P" designates the 40-pin PDIP plastic through-hole package. Typical applications include industrial control and factory automation, automotive subsystems (instrumentation, simple sensor interfaces), consumer electronics (appliance control boards), HVAC controllers, and legacy embedded systems where OTP-based MCU with proven long-term supply is required. The wide temperature range also suits outdoor or harsh-environment installations. When designing with this part, note that OTP memory cannot be reprogrammed - production code must be verified before burn-in. Use the parallel programming mode via ICSP or a gang programmer for volume production. A stable decoupling capacitor (100 nF ceramic + 10 uF bulk) close to VDD/VSS pins is recommended. This page synthesizes distributor pricing, drop-in OTP-MCU alternatives, and practical design notes not found in the manufacturer datasheet alone, including automotive-grade and industrial-grade PIC16C6X family cross-references.

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PIC16C67-04E/PQ - 8-bit 4MHz OTP MCU, 44-MQFP | Microchip
PIC16C67-04E/PQ

PIC16C67-04E/PQ - 8-bit 4MHz OTP MCU, 44-MQFP | Microchip

The Microchip Technology PIC16C67-04E/PQ is an 8-bit CMOS microcontroller from the PIC16C6X family, featuring 14KB (8K x 14) of One-Time Programmable (OTP) program memory, 368 bytes of data RAM, and a maximum clock speed of 4 MHz, all housed in a 44-pin MQFP (10x10 mm) package. The "E" suffix denotes the Extended temperature grade (-40C to +125C), while the "04" indicates the 4 MHz maximum operating frequency and "PQ" identifies the 44-MQFP package. A PIC16C microcontroller belongs to the family of low-cost, high-performance, fully-static 8-bit CMOS microcontrollers built on Microchip's RISC architecture. Within the broader system hierarchy, a PIC16C6X MCU sits below: PIC microcontroller -> 8-bit RISC MCU -> embedded controller -> semiconductor device. The 16C series uses EPROM/ROM-based program memory rather than Flash, making it suitable for mature, stable production runs where code changes are infrequent. Key features include 33 digital I/O pins, three timer/counter modules (Timer0, Timer1, Timer2), a 10-bit multi-channel Analog-to-Digital Converter (ADC), a Universal Synchronous Asynchronous Receiver Transmitter (USART), and a Capture/Compare/PWM (CCP) module. The device supports both parallel (parallel slave port) and serial programming modes and offers low-power consumption: typical 15 uA at 5V/4 MHz and 1 uA at 3V/32 kHz in sleep mode. The PIC16C67 is built on a Harvard architecture with separate program and data buses, executing most instructions in a single instruction cycle (4 clock cycles). This RISC design delivers predictable real-time performance with only 35 single-word instructions to learn. The wide operating voltage range of 2.5V to 6.0V (per the PIC16C6X datasheet family specification) supports battery-backed and industrial environments. Typical applications include industrial control systems, motor control front-ends, sensor interfacing boards, instrumentation, and embedded legacy products where PIC16C codebases are maintained. The 33 I/O pins and integrated peripherals also suit automotive accessory controllers and HVAC interface modules within the Extended temperature range. When designing with this device, ensure in-circuit serial programming (ICSP) access is preserved on the PCB for OTP programming, and budget for a quartz crystal or resonator since the 04 speed grade specifies a 4 MHz maximum clock. Decoupling capacitors should be placed adjacent to VDD/VSS pairs to maintain ADC accuracy. This page consolidates distributor pricing, drop-in same-package alternatives, and practical design notes not found in the standalone manufacturer datasheet.

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PIC16C67-04E/PT - 14KB OTP 8-bit MCU, 4MHz, 44-TQFP | Microchip
PIC16C67-04E/PT

PIC16C67-04E/PT - 14KB OTP 8-bit MCU, 4MHz, 44-TQFP | Microchip

The Microchip Technology PIC16C67-04E/PT is an 8-bit CMOS EPROM/ROM-based microcontroller from the PIC® 16C family, featuring 14KB (8K x 14) of One-Time Programmable (OTP) program memory, 368 bytes of RAM, and 33 digital I/O pins. The device operates at a maximum clock speed of 4 MHz and is housed in a 44-pin TQFP (PT) surface-mount package with industrial/extended temperature grade (E suffix). It uses an external oscillator and is built on Microchip's low-power, high-speed CMOS EPROM/ROM technology with a fully static design. A PIC microcontroller (Programmable Interface Controller) is a family of 8-bit, 16-bit, and 32-bit RISC-based microcontrollers originally developed by General Instrument's Microelectronics Division and popularized by Microchip Technology. PIC MCUs occupy the broader taxonomy of microcontrollers (MCU) -> embedded microprocessors -> semiconductors. They integrate a CPU core, program memory (ROM/EPROM/Flash), data memory (RAM), non-volatile EEPROM, timers, capture/compare/PWM peripherals, analog-to-digital converters, and serial communication peripherals (USART, SPI, I²C) on a single chip. The PIC16C family is the mid-range line, sitting between the baseline PIC10/12/16 families and the enhanced PIC17/18 families, and is the family from which the later flash-based PIC16F series evolved. Key features of the PIC16C67-04E/PT include its 14-bit instruction word architecture, Harvard bus structure, 8-level deep hardware stack, and four interrupt sources. The device supports a wide operating voltage range and offers three timer/counter modules, a Capture/Compare/PWM (CCP) module, a synchronous serial port (SSP) supporting SPI and I²C, a USART for asynchronous serial communication, an 8-bit parallel slave port, and a watchdog timer with its own on-chip RC oscillator for reliable operation. Typical applications for the PIC16C67-04E/PT include industrial control systems, automotive body electronics, consumer appliance control, sensor signal conditioning front-ends, low-speed data acquisition, and embedded control subsystems requiring up to 33 I/O lines. The wide operating voltage range and external oscillator support make it adaptable to systems with non-standard clock sources, while the 44-pin TQFP package provides a compact footprint for space-constrained designs. When designing with this device, engineers should note that PIC16C67 is OTP (one-time programmable) and the -04 speed grade limits the oscillator to 4 MHz (vs. the -10 and -20 speed grades available). The 'E' temperature grade designates the extended temperature range (-40°C to +125°C) versus the standard industrial range (-40°C to +85°C of the 'I' suffix).

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PIC16C67-04I/L - 4MHz 8-Bit OTP MCU 14KB | Microchip PLCC-44
PIC16C67-04I/L

PIC16C67-04I/L - 4MHz 8-Bit OTP MCU 14KB | Microchip PLCC-44

The Microchip Technology PIC16C67-04I/L is an 8-bit EPROM/OTP-based CMOS microcontroller in the PIC16C family, offering 14KB (8K x 14) of program memory, 368 bytes of RAM, and 33 digital I/O pins. It operates at 4 MHz with a 200 ns single-cycle instruction time, supports a 4.5 V to 5.5 V supply, and comes in a 44-pin PLCC (LCC-44, 16.59 x 16.59 mm) industrial-temperature package. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, working RAM, I/O peripherals, and timers onto one die; the PIC16C family is one of the canonical 8-bit RISC architectures and occupies the "8-bit MCU -> general-purpose microcontroller -> embedded controller" branch of the broader semiconductor hierarchy. PIC16C6x parts target low-power, high-volume embedded designs that need more I/O and memory than the PIC16C5x baseline while retaining the classic 35-instruction, single-cycle PIC core. OTP (One-Time-Programmable) EPROM program memory suits mature production runs where firmware is fixed and field updates are not required. Key features of the PIC16C67-04I/L include: 4 MHz maximum clock input (4 MHz internal operation across 4.5 V to 5.5 V), 8 K x 14 (14 KB) OTP program memory, 368 bytes RAM, 33 I/O pins with peripheral compatibility, three timers (Timer0/Timer1/Timer2), and an integrated analog comparator. The device adds a synchronous serial port (SSP) supporting SPI and I2C master/slave modes, plus a USART/SCI for asynchronous or synchronous serial communication. It is built on Microchip's low-power CMOS EPROM technology, drawing typically 15 µA at 5 V / 4 MHz and only 1 µA at 3 V / 32 kHz in standby. The architecture is fully static, allowing the clock to be stopped without losing register state, and provides multiple oscillator options (crystal, ceramic resonator, or external clock). Industrial temperature range (-40°C to +85°C) and brown-out reset are supported, making the part suitable for harsher environments than consumer-grade PICs. Compared to the PIC16C66, the PIC16C67 adds the SSP module and additional RAM, sitting one rung below the PIC16C77 in the family. Typical applications include industrial control boards, HVAC interface panels, sensor hubs, motor-control front ends, smart instrumentation, and embedded serial-connected peripherals. Its 33 I/O and SSP/USART combo make it well suited to mid-density glue-logic replacement and legacy equipment retrofits. When designing with this part, remember that OTP memory cannot be rewritten: program the blank device once with a Microchip programmer such as the MPLAB PM3, and reserve sufficient code space in 8K x 14 for future iterations during prototyping. For development, prefer a JW (windowed) or flash-based PIC16F equivalent. This page synthesizes distributor stock, parametric drop-in alternatives in the same PLCC-44 footprint, and engineering design notes not present in the bare manufacturer datasheet.

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PIC16C67-04I/PQ - 8-Bit 4MHz 14KB OTP MCU 44-MQFP | Microchip
PIC16C67-04I/PQ

PIC16C67-04I/PQ - 8-Bit 4MHz 14KB OTP MCU 44-MQFP | Microchip

The Microchip Technology PIC16C67-04I/PQ is an 8-bit CMOS RISC microcontroller from the PIC16C6X family, featuring a 4 MHz maximum clock input, 14KB (8K x 14) of One-Time-Programmable (OTP) program memory, and 368 bytes of RAM in a 44-pin Metric QFP (MQFP, 10x10 mm) package with industrial-grade temperature rating (-40C to +85C). The '04' speed grade and 'I' temperature suffix distinguish this part within the PIC16C67 family, and it offers 33 digital I/O pins, three timers, two capture/compare/PWM modules, a USART, and a parallel slave port for embedded control. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (ROM/Flash/OTP), data memory (RAM), and programmable peripherals onto one IC. Within the broader semiconductor taxonomy, microcontrollers belong to integrated circuits (ICs) -> microcontrollers -> embedded processors -> computing semiconductors. The PIC16C6X family specifically targets cost-sensitive 8-bit embedded designs using a RISC (Reduced Instruction Set Computer) Harvard architecture, where the program and data buses are physically separate, allowing simultaneous instruction fetch and operand access for higher throughput than Von-Neumann designs at the same clock rate. The PIC16C67's core executes 35 single-word instructions, most in a single instruction cycle (4 clock periods), giving an effective 1 MIPS performance at 4 MHz. This efficiency, combined with OTP memory for low-cost prototyping and small production runs, makes it a classic choice for pre-Flash-era embedded products. The wide operating voltage range (typical 2.5V-6.0V for the PIC16C6X family) supports battery-powered and industrial 5V designs alike. Typical applications include industrial control panels, motor drive signal conditioning, automotive body electronics (pre-CAN era), appliance control boards, security and alarm panels, instrumentation front-ends, and point-of-sale terminals. The 33 I/O pins can directly drive LEDs, optocouplers, keypads, and small relays, while the USART enables RS-232/RS-485 communication with external transceivers. When designing with this device, note that OTP memory cannot be reprogrammed; engineers typically iterate firmware on a windowed (UV-erasable) PIC16C67JW part, then commit final code to the OTP/PQ variant for production. The MPLAB PM3 programmer and PICSTART Plus support this part family. For new designs, Microchip recommends Flash-based successors (PIC16F877, PIC18F family) which offer in-circuit reprogramming and additional peripherals.

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PIC16C67-10/L - 8-bit 10MHz 14KB OTP MCU 33 I/O | Microchip
PIC16C67-10/L

PIC16C67-10/L - 8-bit 10MHz 14KB OTP MCU 33 I/O | Microchip

The Microchip Technology PIC16C67-10/L is an 8-bit CMOS RISC microcontroller from the PIC16CXX family, featuring 14KB of one-time-programmable (OTP) program memory, 368 bytes of RAM, 33 digital I/O lines, and a 10 MHz maximum clock speed in a 44-pin PLCC (LCC-44) surface-mount package. It operates from a 4.5V to 5.5V supply, executes instructions in a single 200 ns cycle (except program branches which take two cycles), and is built on a fully-static CMOS core that supports only 35 single-word instructions. The combination of OTP program memory, 8-bit data path, and 33 I/O lines positions this device as a long-life-cycle industrial MCU for embedded control applications. A microcontroller (MCU) is a single-chip computer that integrates a CPU, non-volatile program memory, working RAM, and programmable I/O peripherals on one die. The PIC16C6X family belongs to the broader category of 8-bit microcontrollers, which sit in the embedded computing hierarchy below 16-bit MCUs, 32-bit MCUs, microprocessors (MPUs), and applications processors. The 8-bit class is widely used in cost-sensitive, deterministic control tasks where 32-bit performance is not required. The PIC16C6X family itself is one of several mid-range PIC families, sitting between the baseline PIC10/12/16/17 families and the high-performance PIC18/dsPIC families. Key features of the PIC16C67-10/L include an integrated 8-bit timer/counter with a programmable prescaler, a 10-bit successive approximation Analog-to-Digital Converter (ADC), a USART module for asynchronous and synchronous serial communication, an MSSP module supporting SPI and I2C, a watchdog timer with its own on-chip RC oscillator, and a programmable code protection mechanism. The 10 MHz maximum input clock produces 100 ns internal instruction cycles (one oscillator period equals one instruction cycle in PIC16 architectures when the divide-by-4 clock scheme is used externally; the 200 ns figure cited in the datasheet reflects the 20 MHz equivalent family documentation). The PIC16C67-10/L's RISC Harvard architecture physically separates program and data memory, allowing instruction fetch and operand read to occur in the same cycle. The 14-bit instruction word and 8-bit data path provide a 2:1 code density advantage over many 8-bit CISC architectures, while the fixed instruction timing simplifies deterministic real-time scheduling. OTP program memory allows one-time factory or field programming, after which the contents are non-volatile, which is well matched to mature production runs that do not require firmware updates. Typical applications include industrial process control, motor drive interfacing, instrumentation front-ends, sensor signal conditioning controllers, automotive body and chassis subsystems (where long-term supply is critical), consumer appliance controllers, and embedded data-acquisition front-ends. The 33 I/O and 10-bit ADC combination makes it well suited to multi-channel analog monitoring plus parallel digital I/O tasks. The PLCC-44 (J-lead) package supports both socketed prototyping and surface-mount production. When designing with the PIC16C67-10/L, ensure that the brown-out reset and watchdog timer are configured in the configuration word before programming, because OTP memory cannot be rewritten. Program the device using a Microchip MPLAB PM3, ICD, or PICkit programmer with the correct adapter for the PLCC-44 socket. The internal RC oscillator option eliminates the external crystal but trades absolute timing accuracy for BOM reduction; a crystal is recommended for any USART communication. Estimate the current budget: at 10 MHz and 5V the device typically draws 5-15 mA active, so verify the regulator has adequate headroom in noisy industrial environments. This page synthesizes distributor stock and pricing, Microchip cross-reference data, and practical design notes drawn from the PIC16C67 family datasheet and the Microchip PIC16C6X Mid-Range MCU Family Reference Manual, providing context that the bare datasheet alone does not.

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PIC16C67-10/P - 8-bit CMOS MCU, 14KB OTP, 20MHz DIP-40
PIC16C67-10/P

PIC16C67-10/P - 8-bit CMOS MCU, 14KB OTP, 20MHz DIP-40

The Microchip Technology PIC16C67-10/P is an 8-bit RISC CMOS microcontroller based on the PIC16CXX core, featuring 14KB of one-time-programmable (OTP) program memory, 368 bytes of RAM, and 33 digital I/O pins in a 40-pin through-hole PDIP package. It executes instructions in a single 200 ns cycle at a 20 MHz external clock and supports 35 single-word instructions for code-dense firmware development. What is a microcontroller? A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (ROM/Flash/OTP), working RAM, and programmable peripherals. The PIC16C family uses a Harvard RISC architecture that physically separates program and data buses, enabling most instructions to complete in one instruction cycle. MCUs belong to the broader category of embedded processors and form the lowest tier of computing devices, below microprocessors and above simple logic ICs. Key features include a wide 2.5V to 6.0V operating supply range, 8 analog input channels (10-bit resolution), a USART module, MSSP for I2C/SPI, three timer/counters, and a watchdog timer. Power consumption is rated at 15 µA typical at 5V/4 MHz and only 1 µA typical at 3V/32 kHz, making the PIC16C67-10/P suitable for both line-powered and battery-influenced designs. The OTP EPROM-based program memory is one-time programmable via a standard device programmer. The architecture combines a hardware multiplier, dual 8-bit timer/counters, and interrupt-driven I/O. Its 14-bit instruction word keeps firmware compact and execution deterministic. The device operates fully statically, so the clock can be stopped without losing register state, which is useful for low-power wait modes in event-driven applications. Typical applications include industrial control logic, instrumentation front ends, automotive subsystems (non-safety), HVAC controllers, sensor signal conditioning, and small appliances where deterministic interrupt response and long-term availability are valued over on-chip Flash reprogrammability. When designing with this part, remember that OTP memory cannot be re-programmed - validate firmware on a windowed (JW) version or a compatible Flash equivalent before committing to production units. Use decoupling capacitors of 0.1 µF on VDD and place them within 5 mm of the supply pins to suppress switching noise from the output driver transitions. This page synthesizes distributor pricing, drop-in compatible alternatives, application guidance, and design notes that are not consolidated on a single manufacturer or distributor page, giving procurement and embedded engineers a single decision-ready reference for the PIC16C67-10/P.

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PIC16C67-10/PQ - 14KB OTP 8-bit MCU, 44-QFP | Microchip
PIC16C67-10/PQ

PIC16C67-10/PQ - 14KB OTP 8-bit MCU, 44-QFP | Microchip

The Microchip Technology PIC16C67-10/PQ is an 8-bit RISC CMOS microcontroller in the PIC16C family featuring 14KB OTP program memory, 368 bytes of RAM, and 33 digital I/O lines. It operates up to a 10 MHz clock (200 ns instruction cycle) from a 4.5V to 5.5V supply and is housed in a 44-pin QFP (PQ) plastic package. The device executes 35 single-cycle instructions with two-cycle branches, giving a deterministic instruction throughput ideal for real-time control. An 8-bit PIC microcontroller is a Harvard-architecture RISC processor that separates program and data memory and uses a small, fixed-width instruction set to simplify firmware development. Within the broader semiconductor hierarchy, this part belongs to: microcontroller -> embedded MCU -> 8-bit MCU -> PIC16C family -> PIC16C67 sub-family -> Microchip PICmicro. Compared with 16-bit and 32-bit MCUs, 8-bit PIC devices trade raw MIPS for predictable interrupt latency, low power, and very low BOM cost, which keeps them relevant for cost-sensitive appliance, industrial, and automotive-body applications. Key features include one 8-bit and three 16-bit timers, a 10-bit multi-channel Analog-to-Digital Converter, a USART, an MSSP (SPI/I2C) port, a capture/compare/PWM module, on-chip watchdog timer with its own RC oscillator, and brown-out reset plus power-on reset. Up to 8K x 14 words of OTP program memory and 368 bytes of data RAM provide enough headroom for state-machine and protocol-stack code. The 33 I/O pins can source/sink up to 25 mA for direct LED or relay drive. The PIC16C67 uses a 14-bit instruction word with a 4-stage pipeline, allowing most instructions to execute in one oscillator cycle. Its OTP program memory is one-time programmable, which suits low-cost production runs where firmware is finalized before mask ROM. A 20 MHz version (PIC16C67-20) and a 4 MHz version (PIC16C67-04) share the same die and pinout, enabling board-level scalability. Typical applications include industrial control, sensor interfaces, low-end motor control, and any embedded product that needs deterministic timing and minimal external components. The integrated peripherals and wide I/O count allow many designs to run from a single chip with no external logic. When designing with this device, allocate decoupling close to each supply pin and confirm the oscillator start-up time for crystal versus resonator mode. The PQ (QFP) package has moderate thermal performance, so designers running near 5V at high clock rates should keep duty cycle in mind for hot-spot calculations. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, supporting faster sourcing decisions for engineers working with legacy Microchip PIC16C designs.

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PIC16C67-10E/L - 8-Bit 14KB OTP MCU 10MHz 44-PLCC | Microchip
PIC16C67-10E/L

PIC16C67-10E/L - 8-Bit 14KB OTP MCU 10MHz 44-PLCC | Microchip

The Microchip Technology PIC16C67-10E/L is an 8-bit RISC CMOS microcontroller with 14KB of one-time programmable (OTP) EPROM program memory, 33 digital I/O lines, and a 10 MHz maximum clock input, housed in a 44-pin Plastic Leaded Chip Carrier (PLCC) J-lead package. The /L suffix denotes the PLCC-44 package, the -10 speed grade denotes a 10 MHz clock input (200 ns instruction cycle), and the E suffix indicates the Extended temperature grade. It belongs to the PIC16C6X mid-range family and is pin-compatible with the PIC16C66/PIC16C65B family members. An 8-bit OTP microcontroller is a Harvard-architecture processor that executes single-cycle instructions from on-chip EPROM (erasable PROM) that is one-time programmable, meaning the code is committed after programming and the device cannot be electrically rewritten. The PIC16C6X family sits within Microchip's mid-range PICmicro hierarchy: PIC16C6X -> mid-range 8-bit -> PICmicro -> microcontroller -> embedded IC. These devices remain popular for legacy industrial, automotive, and white-goods designs where deterministic interrupt response, simple development flow, and long-term supply stability matter more than raw computational throughput. Key features include 14KB OTP program memory, 368 bytes of RAM, a 12-bit ADC with up to 8 channels, a USART with on-chip baud-rate generator, three 16-bit timer/counters, a synchronous serial port (SSP) supporting SPI and I2C master/slave modes, a parallel slave port, 33 digital I/O pins, and a low-power sleep mode that draws roughly 1 uA typical at 3 V / 32 kHz. The wide 2.5 V to 6.0 V operating range (with 4.5 V to 5.5 V at full 10 MHz speed) lets the same firmware run across 3.3 V battery and 5 V industrial rails. Architecturally, the PIC16C67 uses a 14-bit instruction word, an 8-level hardware stack, and separate instruction/data buses (Harvard), giving it predictable single-cycle execution except for two-cycle program branches. The CMOS EPROM cell array provides non-volatile code storage for the lifetime of the product. Typical applications include industrial process control, motor control signal conditioning, HVAC fan/blower controllers, automotive body electronics, security and access-control panels, point-of-sale terminals, white-goods user-interface boards, and embedded sensor hubs. Its 33 I/O pins easily drive keypad matrices, character LCDs, and relay banks. The Extended temperature grade suits outdoor enclosures and under-hood automotive modules. A key design tip: the device is OTP, so plan for windowed (UV-erasable) prototype parts during firmware iteration; once the firmware is finalized, commit to the plastic OTP version for production. Compared with modern PIC16F1xx flash parts, the PIC16C67 trades re-programmability for BOM cost and proven long-term availability. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes drawn from the Microchip PIC16C6X datasheet family - information that goes beyond the manufacturer datasheet by offering parametric proximity scores, board-level replacement guidance, and obsolete-part sourcing context.

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PIC16C67-10E/P - 14KB OTP 8-bit MCU 10MHz | Microchip
PIC16C67-10E/P

PIC16C67-10E/P - 14KB OTP 8-bit MCU 10MHz | Microchip

The Microchip Technology PIC16C67-10E/P is a high-performance 8-bit CMOS EPROM/ROM-based microcontroller from the PIC16C6X family, supplied in a 40-pin PDIP (Plastic DIP) through-hole package with a 10 MHz maximum clock input. It integrates a RISC CPU with 35 single-cycle instructions (200 ns instruction cycle at 20 MHz except program branches which take two cycles), 14 KB of OTP program memory (8K x 14), 368 bytes of RAM, and 33 digital I/O pins for embedded control. Operating voltage spans 4.0 V to 6.0 V across commercial, industrial, and extended temperature grades with very low power draw (5 mA typical at 5 V / 4 MHz, 1 µA typical at 3 V / 32 kHz). A microcontroller (MCU) is a single-chip computer containing a CPU, program memory (ROM/EPROM/Flash), data memory (RAM), and peripheral subsystems on one die. The PIC16C6X family belongs to the broader category of 8-bit microcontrollers, which sit beneath 16-bit and 32-bit MCUs in the performance hierarchy. OTP (One-Time-Programmable) EPROM technology allows firmware to be programmed once and retained indefinitely, which is well suited to mature production designs where code is stable. Key features include a fully static design supporting DC to 20 MHz operation, 8-bit ADC channels on selected family members, three timer/counters (TMR0, TMR1, TMR2), a USART for serial communication, capture/compare/PWM modules, a watchdog timer with its own on-chip RC oscillator, and synchronous serial port (SSP) support for SPI/I2C. Brown-out reset and power-on reset provide clean startup, and the in-circuit serial programming (ICSP) interface enables device programming without removal from the board. The PIC16C67 architecture uses a Harvard structure with separate program and data buses, a 14-bit wide instruction word, and an 8-bit-wide data path. This wide instruction word allows most instructions to execute in one instruction cycle with deterministic timing, which simplifies real-time control loops in motor, power-conversion, and instrumentation applications. Typical applications include industrial automation controllers, automotive body and chassis ECUs (extended temperature grade), consumer appliance control boards, smart sensor front-ends, and legacy embedded systems designed in the late 1990s and 2000s that remain in long-life production. The 40-pin PDIP package is also widely used in educational and hobbyist development because it is breadboard-friendly and socketable. When designing with the PIC16C67-10E/P, note that the `-10` speed suffix denotes a 10 MHz maximum clock input. Decouple VDD with a 0.1 µF ceramic capacitor placed within 5 mm of each VDD/VDD2 pin, and use the MCLR pin reset circuit per Microchip application note TB016 (4.7 kΩ pull-up to VDD, optional diode to VDD). For new designs requiring Flash memory, consider the pin-compatible PIC16F877 family for easier field upgrades. This page synthesizes current distributor pricing, drop-in Microchip same-family alternatives, and practical design notes not found in the standalone manufacturer datasheet.

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PIC16C67-10E/PQ - 8-bit OTP MCU, 14KB, 10MHz, 44-MQFP | Microchip
PIC16C67-10E/PQ

PIC16C67-10E/PQ - 8-bit OTP MCU, 14KB, 10MHz, 44-MQFP | Microchip

The Microchip Technology PIC16C67-10E/PQ is an 8-bit CMOS EPROM-based microcontroller built on the PIC16C RISC architecture, offering 8K x 14 (14KB) words of one-time programmable (OTP) program memory, 368 bytes of data RAM, and 33 programmable digital I/O lines. Housed in a 44-pin Metric Quad Flat Pack (MQFP / PQ) package with gull-wing leads, the part operates at up to 10 MHz external clock input, delivering 200 ns single-cycle instruction execution for all 35 instructions except program branches, which are two-cycle. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, RAM, non-volatile program memory, and peripheral I/O on one silicon die, intended for embedded control applications. PIC16C-series parts sit within the broader taxonomy: 8-bit microcontroller -> CMOS microcontroller -> RISC microcontroller -> microcontroller -> embedded processor -> semiconductor. The PIC16C6x family specifically delivers low-cost OTP/UV-erasable EPROM program memory with a small instruction set (35 instructions) optimized for compact code density and deterministic interrupt latency. Key features include a wide 2.5V to 6.0V supply range, ultra-low power consumption of 15 µA typical at 5V/4 MHz and 1 µA typical at 3V/32 kHz, fully static design supporting operation down to DC clock, and three timer/counter modules, a USART, and a parallel slave port as standard PIC16C6x peripherals. Industrial and Extended temperature grades are supported per the "-E" (Extended) suffix. The device uses an EPROM-based Harvard architecture with a 14-bit program word and 8-bit data path, allowing a single 8-bit ALU to fetch and execute from a 14-bit-wide instruction memory in a single cycle. This dual-bus arrangement eliminates the Von Neumann fetch/decode bottleneck and yields deterministic instruction timing critical for real-time control loops. Typical applications include industrial process controllers, motor and stepper control, automotive body electronics (premium-tier nodes), appliance controls, sensor signal conditioning front-ends, and embedded serial-communication bridges. The 33 I/O and USART simplify keypad/LCD and RS-232 interface designs. Designers should note that the "-E" suffix denotes the Extended temperature range (-40C to +125C), the "-10" suffix denotes 10 MHz maximum clock, and the "/PQ" suffix denotes the 44-pin Metric QFP (MQFP) package. Because the program memory is OTP (one-time programmable), in-circuit firmware upgrades are not possible; provision a windowed or flash-based sibling such as PIC16F877 for development and field-revision work. This page synthesizes distributor inventory signals, parametric cross-reference data, and practical design notes that the manufacturer datasheet alone does not present in a single view.

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PIC16C67-10I/PQ - 8-bit OTP MCU, 14KB, 33 I/O | Microchip | 44-MQFP
PIC16C67-10I/PQ

PIC16C67-10I/PQ - 8-bit OTP MCU, 14KB, 33 I/O | Microchip | 44-MQFP

The Microchip Technology PIC16C67-10I/PQ is an 8-bit CMOS EPROM/ROM-based microcontroller in the PIC16C6x family, offering 14 KB of one-time-programmable (8K x 14) program memory, 368 bytes of RAM, and 33 digital I/O pins in a 44-pin Metric Quad Flat Pack (MQFP) package. It operates at up to 10 MHz and supports a wide supply voltage range of 2.5 V to 6.0 V with fully static design. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory (ROM/EPROM/Flash), data RAM, and peripheral interfaces such as timers, USART, and I/O ports. Microcontrollers belong to the broader category of embedded processors within the semiconductor hierarchy. PIC microcontrollers use a RISC Harvard architecture with separate program and data buses, enabling single-cycle instruction execution and predictable interrupt response. Key features of the PIC16C67-10I/PQ include 14 KB of OTP program memory, 368 bytes of RAM, three timers, a USART serial port, a Parallel Slave Port, and a Capture/Compare/PWM module. Industrial temperature grade (-40 °C to +85 °C) is indicated by the 'I' suffix, while 'PQ' denotes the 44-pin MQFP package. Low-power consumption is highlighted at 15 µA typical at 5 V/4 MHz and 1 µA typical at 3 V/32 kHz, supporting battery and standby-sensitive designs. The device is built on low-power, high-speed CMOS EPROM/ROM technology and is fully static, allowing the clock to be stopped without losing register state. The wide operating voltage range and 33 I/O pins make it suitable for controlling multiple peripherals including keypads, displays, sensors, and communication interfaces in industrial, commercial, and consumer systems. Typical applications include industrial automation controllers, automotive body electronics (non-safety), appliance control, security and access systems, instrumentation front-ends, and embedded control boards that require multiple digital I/O lines, serial communication, and moderate program memory. The Parallel Slave Port enables interface to an external host processor for data exchange. When designing with this device, note that OTP memory is one-time programmable and not re-programmable in-circuit; for firmware development, a windowed (UV-erasable) CERDIP variant or a Flash-based PIC16F equivalent is preferred. Provide a 0.1 µF decoupling capacitor close to VDD and ensure MCLR is correctly tied to avoid unintended resets. This page synthesizes distributor pricing, verified drop-in alternatives, and practical design notes not consolidated on any single manufacturer or distributor page.

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PIC16C67-10I/PT - 8-Bit 10MHz 14KB OTP MCU, 44-TQFP | Microchip
PIC16C67-10I/PT

PIC16C67-10I/PT - 8-Bit 10MHz 14KB OTP MCU, 44-TQFP | Microchip

The Microchip Technology PIC16C67-10I/PT is an 8-bit PICmicro microcontroller built on OTP (One-Time-Programmable) EPROM/ROM CMOS technology, featuring 14KB of program memory (8K x 14 words), 368 bytes of RAM, and 33 digital I/O lines, housed in a 44-pin TQFP (PT) package. It operates at up to 10MHz instruction rate from a 4.0V to 6.0V supply and is specified over the industrial -40C to +85C temperature range, as denoted by the "I" suffix. An 8-bit microcontroller (MCU) is a small single-chip computer that integrates a CPU, non-volatile program memory, working RAM, peripheral set (timers, USART, ADC, I/O), and an interrupt controller on a single die. PIC microcontrollers sit within the broader category of microcontrollers -> microcontrollers (embedded computing) -> semiconductors. The PIC16C family (PIC mid-range 14-bit instruction set) is engineered for deterministic real-time control with a fully static design, allowing the clock to be stopped without losing internal state. Key features of the PIC16C67-10I/PT include the 14-bit instruction word (which gives 8K single-word instructions per 14KB array), an integrated 8-bit A/D converter with multiple input channels, two 8-bit timers plus one 16-bit timer/counter, a USART module with synchronous/asynchronous modes, a watchdog timer with on-chip RC oscillator, and a wide 2.5V to 6.0V operating voltage range. The device also supports in-circuit serial programming (ICSP) via the RB6/RB7 pins for OTP reprogramming during prototyping. Architecture details: the PIC16C67 uses a Harvard architecture with separate program and data buses, allowing instruction fetch and data access in a single cycle. The 14-bit instruction word provides richer opcode encoding than 12-bit PIC cores, enabling larger immediate operands and direct addressing across the full data memory. The fully static design allows low-power operation by halting the clock, while the brown-out reset and power-on reset circuits simplify supply supervision. Typical applications span industrial control and instrumentation, HVAC actuator and sensor interfaces, motor control front-ends, automotive body and chassis subsystems, white-goods and appliance controllers, and embedded data-acquisition front ends that need parallel I/O and a USART for host communication. The wide temperature range also makes it suitable for outdoor or factory-floor environments. Design consideration: OTP memory cannot be re-programmed in the field - designs using the PIC16C67-10I/PT must either be masked-ROM programmed in volume (PIC16CR67) or moved to a flash-based equivalent such as the PIC16F877 for field-updatable firmware. Plan programming flow accordingly. This page synthesizes distributor pricing, pin-compatible drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.

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PIC16C67-20/L - 8-Bit 20MHz OTP MCU, 14KB | Microchip
PIC16C67-20/L

PIC16C67-20/L - 8-Bit 20MHz OTP MCU, 14KB | Microchip

The Microchip Technology PIC16C67-20/L is an 8-bit RISC CMOS microcontroller from the PIC® 16C family, featuring a 20MHz maximum clock speed, 14KB (8K x 14) of One-Time-Programmable (OTP) program memory, and 368 bytes of RAM, housed in a 44-pin PLCC package measuring 16.59x16.59mm. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (ROM/Flash/OTP), data memory (RAM), and programmable I/O peripherals into one package. Within the broader semiconductor hierarchy, microcontrollers belong to the embedded systems domain, sitting alongside microprocessors, DSPs, and SoCs. The PIC16C6X family specifically targets cost-sensitive industrial control and instrumentation applications where OTP memory and 8-bit simplicity deliver reliable deterministic behavior at low cost. Key differentiating features of the PIC16C67-20/L include 33 digital I/O pins, an operating voltage range of 4V to 6V, and ultra-low power consumption: 15 µA typical at 5V/4MHz and 1 µA typical at 3V/32kHz. The RISC core offers 35 single-word instructions with single-cycle execution (except program branches, which take two cycles). Integrated peripherals typically include timers, a USART, parallel ports, and analog comparators per the PIC16C6X family architecture. The architecture combines a Harvard-style separate program and data bus with CMOS EPROM/ROM technology for fully-static operation from DC up to 20MHz. This static design eliminates minimum clock-rate constraints, enabling power-saving sleep modes. The wide operating voltage range (2.5V-6V typical across the family) supports battery-backed and industrial 5V systems alike. Typical applications include industrial control systems, embedded instrumentation, sensor interface nodes, motor control peripherals, and legacy equipment retrofits. The 33 I/O count and 14KB OTP capacity make it suitable for medium-complexity logic replacement, ASIC substitution, and protocol-bridging firmware tasks in mature designs. When designing with this part, note that the OTP memory requires one-time programming per unit; for prototyping or low-volume runs, consider the windowed (JW) or Flash-based PIC16F family equivalents. The 44-PLCC package is socket-compatible with the entire PIC16C6X PLCC family, simplifying field replacement. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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PIC16C67-20/PQ - 8-Bit 20MHz 14KB OTP MCU 44-MQFP | Microchip
PIC16C67-20/PQ

PIC16C67-20/PQ - 8-Bit 20MHz 14KB OTP MCU 44-MQFP | Microchip

The Microchip Technology PIC16C67-20/PQ is an 8-bit RISC CMOS microcontroller from the PIC16C family, featuring 14KB (8K x 14) of One-Time-Programmable (OTP) program memory, 368 bytes of RAM, and 33 digital I/O pins. The device operates from DC to 20 MHz and is housed in a 44-pin Metric QFP (MQFP, 10x10 mm) package. The "20" speed suffix denotes 20 MHz maximum clock frequency, while the "/PQ" suffix denotes the plastic Metric Quad Flat Pack (MQFP) commercial-temperature tray packaging. A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory, working RAM, and configurable peripherals. The PIC16C family sits within Microchip's classic mid-range 8-bit portfolio, originally launched in the 1990s as the PIC16C6X series of OTP-programmed RISC microcontrollers. These parts predate modern flash-based PIC16F devices and are typically used as replacements for legacy systems where existing firmware was written for the OTP core. The hierarchy is: PIC16C67 -> PIC16C6X family -> PIC16C mid-range 8-bit MCU -> 8-bit microcontroller -> embedded processor -> semiconductor. Key features of the PIC16C67-20/PQ include the Harvard RISC architecture with 35 single-word instructions (most single-cycle, branches two-cycle), 8-level deep hardware stack, 14-bit instruction word, two 8-bit timers plus one 16-bit timer, a 5-channel 8-bit ADC, synchronous serial port (SSP) supporting SPI and I²C, USART with addressable RS-485 mode, watchdog timer with on-chip RC oscillator, and brown-out reset / power-on reset / power-up timer. The CMOS process delivers low-power operation suitable for battery and industrial embedded systems. The PIC16C67-20/PQ is designed around Microchip's classic PIC mid-range architecture using a 14-bit program memory bus, separate 8-bit data bus, and dedicated peripheral registers. The 8K x 14 program word ROM is accessed through a 13-bit PC, allowing linear addressing across the 14KB OTP array. Peripherals are memory-mapped and configured through banked SFRs; the core supports hardware multiply assistance in selected derivatives. Typical applications include industrial control and instrumentation, motor control front-ends, sensor interfacing with on-chip ADC, automotive body and chassis subsystems (when qualified per automotive spec), legacy replacement of older PIC16C55/PIC16C57 designs that require more memory and I/O, and embedded systems requiring parallel slave port expansion. The 33 I/O pins and 5 ADC channels make it well suited for measurement and control panels. When designing with the PIC16C67-20/PQ, ensure the oscillator configuration matches the application's clock accuracy requirement - crystal, ceramic resonator, or external clock inputs are supported via OSC1/OSC2. Decoupling VDD/VSS pairs with 100 nF ceramic capacitors placed as close to the pins as possible is recommended. Programming via ICSP requires RB6/RB7 and the MCLR pin to be accessible. This page synthesizes distributor pricing, drop-in same-brand and cross-brand alternatives within the same 44-MQFP footprint, parametric comparison data, and practical design notes that augment the manufacturer datasheet with engineering context for sourcing and selection decisions.

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PIC16C67-20/PT - 8-bit MCU, 14KB OTP, 20MHz, 44-TQFP | Microchip
PIC16C67-20/PT

PIC16C67-20/PT - 8-bit MCU, 14KB OTP, 20MHz, 44-TQFP | Microchip

The Microchip Technology PIC16C67-20/PT is an 8-bit CMOS RISC microcontroller from the PIC16CXX family, featuring 14KB of one-time-programmable (OTP) program memory, 368 bytes of RAM, and 33 digital I/O pins in a 44-pin TQFP package. It is specified for a 20 MHz maximum clock input and operates across an industrial temperature range, making it well-suited to embedded control applications that demand deterministic, low-power 8-bit processing. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, non-volatile program memory, volatile data memory, and programmable I/O peripherals on one die. Within the broader taxonomy, PIC16C microcontrollers belong to the RISC microcontroller class, sit under the PICmicro family, and ultimately fall within the embedded microcontroller category under Integrated Circuits (ICs). The 'C' suffix denotes the OTP ROM program-memory variant, distinct from the flash-based 'F' and electrically erasable 'E' parts. Key features of the PIC16C67-20/PT include a Harvard RISC CPU executing 35 single-word instructions in a single cycle (200 ns at 20 MHz), an integrated 8-channel 8-bit A/D converter, three timer/counters, a synchronous serial port (SSP) supporting SPI and I2C, a USART, and a 20 MHz operating speed. The Harvard architecture separates program and data buses, which lets the CPU fetch the next instruction while reading data memory - a foundational source of the PIC family's deterministic interrupt latency. Typical applications include industrial control panels, sensor signal conditioning, motor control front-ends, automotive body electronics (non-safety), instrumentation, and legacy embedded products that depend on the PIC16C6X pinout. The 44-pin TQFP footprint provides enough I/O for keypad scanning, LCD drive, and serial communication concurrently. When designing with this part, note that OTP memory can be programmed only once, so firmware bugs cannot be patched in the field - place a socketed windowed CERDIP variant (PIC16C67-20/JW) on prototypes to allow code iteration. Also confirm the programmer (e.g., MPLAB PM3) supports the OTP device before board bring-up. This page synthesizes distributor pricing, parametric drop-in alternatives, and practical design notes for engineers migrating PIC16C67 designs onto flash-based PIC16F77 or PIC16F877A equivalents, with content not available in the bare Microchip datasheet.

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PIC16C67-20E/L - 8-Bit 20MHz OTP MCU 14KB | Microchip | PLCC-44
PIC16C67-20E/L

PIC16C67-20E/L - 8-Bit 20MHz OTP MCU 14KB | Microchip | PLCC-44

The Microchip Technology PIC16C67-20E/L is an 8-bit RISC microcontroller from the PIC16C6X family, featuring a 20 MHz maximum clock input, 14KB of one-time-programmable (OTP) program memory organized as 8K x 14 words, and 368 bytes of data RAM, housed in a 44-pin PLCC (J-lead) package. This automotive-temperature-grade ("E" suffix) variant is qualified for -40C to +125C operation, making it suitable for industrial and automotive applications. The PIC16C6X core executes 35 single-word instructions with a Harvard architecture that allows most instructions to complete in a single instruction cycle (200 ns at 20 MHz). A microcontroller is a single-chip computer that integrates a CPU, memory (program ROM/RAM), and peripherals onto one die. The PIC16C family belongs to the 8-bit microcontroller category, sitting under the broader hierarchy of embedded microcontrollers -> microcontrollers -> embedded processors -> semiconductors. These devices are distinct from microprocessors because they integrate flash/ROM, RAM, and I/O on a single chip, eliminating external bus interfaces and reducing BOM cost and PCB area. Key features of the PIC16C67-20E/L include five 8-bit I/O ports (Ports A-E) totaling 33 digital I/O pins, three timer/counter modules (Timer0, Timer1, Timer2), a Universal Synchronous Asynchronous Receiver Transmitter (USART), a Capture/Compare/PWM (CCP) module, an 8-bit parallel slave port, and a watchdog timer with its own on-chip RC oscillator. The device operates from 4.5V to 5.5V and includes power-saving SLEEP mode and a programmable code protection mechanism. The 44-pin PLCC package provides ample I/O for legacy through-hole designs. Architecturally, the PIC16C67 uses a modified Harvard core with separate program and data buses, allowing instruction fetch and operand read to occur in the same cycle. The OTP program memory is windowless and cannot be erased, so this part is intended for high-volume production where firmware is finalized. Compared with later Flash-based PIC16F877, the PIC16C67 is the older EPROM/OTP generation and is increasingly targeted at long-lifecycle maintenance and legacy systems. Typical applications include industrial control systems, automotive body controllers, HVAC controllers, security and alarm panels, motor control boards, and consumer appliance controllers. The automotive temperature grade and PLCC through-hole footprint make this part particularly suitable for designs that must survive harsh thermal environments or be socketed for field replacement. When designing with the PIC16C67-20E/L, note that OTP memory cannot be reprogrammed - any firmware change requires a new device. Use an MPLAB ICD or PRO MATE programmer with the appropriate OTP adapter. Brown-out reset, the watchdog timer, and code protection should be enabled in production firmware to improve field reliability. This page consolidates distributor pricing, verified cross-reference alternatives, and practical design notes that go beyond the datasheet to help engineers sourcing this mature part for legacy maintenance and new automotive-grade designs.

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PIC16C67-20E/PT - 14KB OTP 8-Bit MCU 20MHz TQFP-44 | Microchip
PIC16C67-20E/PT

PIC16C67-20E/PT - 14KB OTP 8-Bit MCU 20MHz TQFP-44 | Microchip

The Microchip PIC16C67-20E/PT is a member of the PIC16C6X family of low-cost, high-performance CMOS fully-static 8-bit microcontrollers, featuring 14KB of One-Time Programmable (OTP) program memory, 368 bytes of RAM, and 33 digital I/O pins in a 44-pin TQFP (PT) package. The device operates from DC up to a 20 MHz external clock and executes 35 single-word RISC instructions, with all single-cycle except program branches which take two cycles. A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory, data RAM, and peripheral interfaces such as timers, capture/compare, and communication ports. The PIC16C family sits within the broader taxonomy of embedded 8-bit microcontrollers -> microcontrollers -> microprocessors -> integrated circuits -> semiconductors. The PIC16C6X sub-family in particular uses a Harvard architecture with separate program and data buses, enabling single-cycle instruction fetch and deterministic interrupt response. Key features of the PIC16C67-20E/PT include on-chip peripherals: three timers, two capture/compare/PWM modules, two serial communication ports (USART/SCI and SPI/I2C), an 8-bit parallel slave port, a watchdog timer, and a brown-out reset circuit. The 368-byte RAM supports a 14-bit instruction word with 8-bit data path, and the OTP program memory is one-time programmable - ideal for low-volume production or prototyping before mask-ROM conversion. Typical applications for the PIC16C67-20E/PT include industrial control, instrumentation, automotive body electronics, sensor interfacing, and embedded control boards. The 33 I/O pins and rich peripheral set make it well suited for mixed-signal control applications that require multiple timer channels and serial connectivity without external glue logic. The 20 MHz clock delivers 5 MIPS of computational throughput. When designing with this device, ensure the MCLR reset circuit follows Microchip's recommended RC configuration and that the oscillator start-up timer accounts for crystal stabilization. The OTP memory variant is best suited for development and pre-production runs; for high-volume production consider the mask-ROM or Flash siblings (PIC16F877A, PIC16C77) which use the same pinout. This page synthesizes distributor pricing, drop-in pin-compatible alternatives, and practical design notes not found in the manufacturer datasheet, giving engineers a single-source reference for sourcing and second-sourcing decisions.

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PIC16C67-20I/L - 8-Bit 20MHz OTP MCU 14KB | Microchip PLCC-44
PIC16C67-20I/L

PIC16C67-20I/L - 8-Bit 20MHz OTP MCU 14KB | Microchip PLCC-44

The Microchip Technology PIC16C67-20I/L is an 8-bit CMOS microcontroller from the PIC16C family, featuring 20 MHz maximum clock speed, 14KB (8K x 14) of One-Time-Programmable (OTP) program memory, and 368 bytes of RAM, housed in a 44-pin PLCC (J-lead) package. Operating from 4.5V to 5.5V over the industrial temperature range (-40C to +85C), the PIC16C67-20I/L is the industrial-temperature grade of the PIC16C67 family and is designed for embedded control applications requiring ROM-based program storage with one-time programmability. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, RAM, and I/O peripherals. The PIC16C family uses a RISC-style architecture with 35 single-word instructions, all executing in one instruction cycle except program branches (two cycles), giving 200 ns instruction time at 20 MHz. Compared to 16-bit or 32-bit MCUs, 8-bit parts remain popular for cost-sensitive, deterministic control tasks. Key features of the PIC16C67-20I/L include 33 digital I/O pins, a fully static design that allows DC to 20 MHz clock input, three timers, a USART, capture/compare/PWM modules, and a parallel slave port. The OTP program memory enables low-cost prototyping and small-to-medium volume production, and the CMOS process delivers low power consumption (15 uA typical at 5V/4 MHz). Architecturally, the PIC16C67 uses a Harvard bus with separate program and data memories, an 8-bit ALU, and a hardware stack. The OTP cell is programmed via the Microchip PM3 universal programmer, supporting in-circuit serial programming on appropriate variants. On-chip peripherals include an 8-bit ADC on related family members and two analog comparators in this part. Typical applications include industrial automation controllers, motor control front-ends, sensor signal conditioning, instrumentation, automotive body electronics, and consumer appliance controls. The wide operating voltage (4.5V to 5.5V) and -40C to +85C industrial range make it suitable for factory-floor equipment. When designing with the PIC16C67-20I/L, note that OTP parts cannot be reprogrammed in-circuit; use a Flash-based PIC16F77 or PIC16F877 for development iterations. The PLCC-44 socket simplifies programming and field replacement, but for new designs consider migration to modern Flash PIC MCUs. This page synthesizes distributor pricing, drop-in alternatives from the same PIC16C6X family, and practical design notes not aggregated in the manufacturer datasheet.

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