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PIC16C65A-10E/PQ - 8-Bit CMOS MCU, 7KB OTP, 10MHz | Microchip
PIC16C65A-10E/PQ

PIC16C65A-10E/PQ - 8-Bit CMOS MCU, 7KB OTP, 10MHz | Microchip

The Microchip Technology PIC16C65A-10E/PQ is an 8-bit RISC CMOS microcontroller in the PIC16C family, delivering 10 MHz maximum clock operation with 7 KB of One-Time Programmable (OTP) program memory (4K x 14 organization) in a 44-pin MQFP package. The "-10" suffix indicates a 10 MHz clock rating and the "E" suffix denotes the Extended operating temperature range. An 8-bit CMOS microcontroller is a single-chip computer built on a Harvard RISC architecture, integrating a CPU, program memory, data RAM, and peripheral interfaces on one die. Within the broader taxonomy, an 8-bit MCU sits below 16-bit and 32-bit microcontrollers in arithmetic width and instruction complexity, but above fixed-function logic ICs in programmability, and belongs to the power-managed embedded computing category in modern electronic systems. The PIC16C6X family uses a 14-bit instruction word optimized for compact code density. Key specifications include a 4.5 V to 6.0 V supply range, maximum supply current of 30 mA, fully-static design supporting DC to 10 MHz operation, and low-power consumption of 15 µA typical at 5 V/4 MHz and 1 µA typical at 3 V/32 kHz. The device offers 35 single-word instructions with all single-cycle execution except program branches (two-cycle), and integrates multiple peripheral interfaces including parallel ports and serial communication. The architecture uses a RISC CPU core with separate program and data buses, enabling simultaneous instruction fetch and data access. This Harvard architecture, combined with CMOS EPROM/ROM technology, gives the PIC16C65A its characteristic deterministic timing, low power, and high code efficiency that made the PIC16 family a workhorse of industrial embedded design. Typical applications include industrial control systems, automotive subsystems, and consumer electronics requiring reliable 8-bit processing with simple peripheral integration. The Extended temperature grade supports operation in thermally demanding environments such as under-hood automotive modules and factory automation controllers. When designing with this device, note that OTP memory requires factory or pre-production programming; field firmware updates are not possible. Engineers transitioning from PIC16C65A to newer PIC18 or dsPIC parts should review peripheral register changes and instruction-set differences before PCB rework.

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PIC16C65A-10I/L - 8-Bit 10MHz OTP MCU 7KB | Microchip
PIC16C65A-10I/L

PIC16C65A-10I/L - 8-Bit 10MHz OTP MCU 7KB | Microchip

The Microchip Technology PIC16C65A-10I/L is an 8-bit RISC CMOS microcontroller built around the PIC16C6X core, integrating 7KB (4K x 14) of One-Time Programmable (OTP) EPROM program memory and 192 bytes of data RAM in a 44-pin PLCC (J-lead, package code QCCJ) industrial-temperature package. It executes instructions at a 10 MHz maximum clock input while drawing only 15 uA typical at 5V / 4 MHz and 1 uA typical at 3V / 32 kHz, with a fully-static design that supports DC to 20 MHz clock input. The device exposes 33 digital I/O pins, supports a wide operating voltage range up to 6.0V, and is offered in commercial, industrial, and extended temperature grades; the "/L" suffix denotes the 44-pin PLCC industrial-grade (-40C to +85C) option. An 8-bit microcontroller (MCU) is a small, self-contained computing system on a single chip that integrates a CPU, program memory (ROM/EPROM/Flash/OTP), working RAM, and programmable I/O peripherals. The PIC16C6X family uses a Harvard RISC architecture with separate program and data buses, only 35 single-word instructions, and all single-cycle instruction execution except program branches (which take two cycles). In the system hierarchy this places PIC16C65A-10I/L at: 8-bit MCU -> RISC microcontroller -> embedded controller -> semiconductor IC. Key features include 33 I/O lines spread across multiple ports, a peripheral feature set derived from PIC16C66/67 (synchronous/asynchronous serial ports, PWM, capture/compare timers, 8-bit A/D converter channeling), brown-out reset, watchdog timer, and low-power SLEEP/idle modes. The OTP program memory is one-time programmable using programmers such as MPLAB PM3, which is a hard requirement for production designs where firmware is finalized. Typical applications include industrial control panels, instrumentation, motor control front-ends, sensor interfacing nodes, and legacy embedded systems that require a robust 8-bit core with abundant I/O. Industrial-grade temperature rating (-40C to +85C) and the 44-pin PLCC package make it a strong fit for through-hole-style industrial backplanes and field-replaceable modules. When designing with this device, ensure that the chosen programmer supports the PIC16C65A OTP window (PM3 recommended) and that the brown-out and watchdog configuration bits match the application's fault-recovery strategy. Note that OTP parts cannot be re-programmed, so firmware validation must be finalized before production programming. This page synthesizes distributor pricing, drop-in same-brand and cross-brand alternatives in the 44-PLCC footprint, and practical design notes not found in the standalone manufacturer datasheet.

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PIC16C65A-10I/PQ - 8-bit RISC MCU, 7KB OTP, 44-MQFP | Microchip
PIC16C65A-10I/PQ

PIC16C65A-10I/PQ - 8-bit RISC MCU, 7KB OTP, 44-MQFP | Microchip

The Microchip PIC16C65A-10I/PQ is an 8-bit RISC microcontroller from the PIC16C6X family, featuring 7 KB of OTP program memory, 192 bytes of data RAM, and a maximum clock speed of 10 MHz, housed in a 44-pin MQFP (PQ) package rated for the industrial -40C to +85C temperature range. The device integrates I2C, SPI, and USART serial peripherals, three timers, two PWM channels, and a watchdog timer, making it a self-contained control platform for the implemented product design. A PIC microcontroller is a compact, Harvard-architecture microcontroller that integrates a CPU, program memory, RAM, and peripheral peripherals into a single chip. PIC16C6X devices sit in the mid-tier of Microchip's 8-bit portfolio (PIC16 -> PIC microcontroller -> microcontroller -> embedded processor -> semiconductor), optimized for cost-sensitive industrial and embedded applications that need deterministic interrupt response and low power consumption rather than raw compute throughput. Key features of the PIC16C65A-10I/PQ include a RISC CPU with 35 single-word instructions, fully static design supporting DC to 10 MHz clock input, and wide operating voltage range typical of 2.5V to 6.0V. The 7 KB OTP program memory and 192-byte RAM are sized for moderate firmware complexity (control loops, protocol stacks, sensor interfacing). Industrial-grade -40C to +85C qualification, in-circuit serial programming capability, and a 44-pin MQFP footprint ease PCB integration in legacy and new industrial designs. The device uses CMOS EPROM/ROM technology, fully static logic, and a 14-bit instruction word. Low-power performance is characterized as <15 mA typical at 5V/4 MHz and <1 mA typical at 3V/32 kHz. Watchdog, power-on reset, brown-out detect, and code-protect features contribute to system robustness. Interrupts, a hardware USART, and capture/compare PWM blocks support motor control, instrumentation, and human-interface subsystems. Typical applications include industrial automation controllers, motor and solenoid drive control boards, instrumentation front-ends with serial communication to a host, and embedded sensor nodes using I2C/SPI. The 44-MQFP package and industrial temperature range also suit legacy replacement, factory automation, and harsh-environment monitoring designs. When designing with this part, plan OTP programming before final PCB assembly: OTP cannot be erased, so firmware must be validated on windowed or flash siblings first. The 44-pin footprint, 5V typical supply, and classic PIC16C6X peripherals make direct migration to PIC16F87X or PIC18 devices straightforward when more memory or in-system reprogrammability is needed. This page synthesizes distributor stock, parametric data, drop-in same-brand alternatives, and design considerations not consolidated in the legacy datasheet, helping engineers and buyers accelerate sourcing and PCB redesign decisions.

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PIC16C65A-10I/PT - 8-Bit 10MHz OTP MCU 7KB Flash 44-TQFP | Microchip
PIC16C65A-10I/PT

PIC16C65A-10I/PT - 8-Bit 10MHz OTP MCU 7KB Flash 44-TQFP | Microchip

The Microchip Technology PIC16C65A-10I/PT is an 8-bit CMOS OTP microcontroller based on the PIC16CXX family, featuring 7KB (4K x 14) of program memory, 192 bytes of RAM, and 33 digital I/O pins housed in a 44-pin TQFP package. It operates at 10 MHz and supports a wide 2.5V to 6.0V supply range, delivering fully static operation suitable for battery-friendly and industrial embedded designs. An 8-bit microcontroller (MCU) is a small, low-power computer-on-a-chip integrating a CPU, RAM, program memory, and peripherals on a single die. It belongs to the broader category of embedded microcontrollers, which sit inside the hierarchy of microprocessors -> microcontrollers -> 8-bit microcontrollers -> PIC16C family. The PIC16C65A is part of Microchip's mid-range PIC16C OTP (One-Time-Programmable) lineage, chosen for its deterministic Harvard architecture, simple instruction set, and field-proven reliability in long-life industrial equipment. Key features include 33 I/O pins, three timers (Timer0, Timer1, Timer2), a 10-bit ADC, a USART for serial communication, and capture/compare/PWM (CCP) peripherals. Power consumption is rated at 5V/4 MHz at 15 uA typical and 3V/32 kHz at 1 uA typical, demonstrating low-power CMOS design that suits battery-backed instrumentation. Industrial temperature grade (-40C to +85C) is denoted by the 'I' suffix, and the OTP memory enables factory-programmed code storage for volume production. The PIC16C65A uses Microchip's RISC-based PIC16 architecture with 14-bit wide instructions, an 8-bit data path, and a two-stage pipeline for predictable single-cycle execution (200 ns per instruction at 10 MHz). The integrated 10-bit ADC supports up to 8 analog channels, enabling mixed-signal designs without an external converter. In-system serial programming (ICSP) is supported via dedicated RB6/RB7 pins, simplifying firmware upgrades on assembled boards. Typical applications include industrial control systems, sensor signal conditioning, motor control, white-goods appliances, and embedded instrumentation where deterministic response and long-term supply stability matter. The 33 I/O count makes it well suited to keypad scanning, LED multiplexing, and relay/SSR driver boards. When designing with this MCU, ensure the supply decoupling network includes a 0.1 uF ceramic capacitor close to VDD and a bulk tantalum/electrolytic capacitor to handle switching transients. Place the crystal or resonator within 1 cm of the OSC1/OSC2 pins to minimize clock jitter and EMI susceptibility. This page synthesizes Microchip datasheet specifications, distributor pricing, drop-in OTP and Flash alternatives, and practical design notes not consolidated on the official product page, helping engineers shorten BOM validation and component selection time.

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PIC16C65A-20/P - 8-Bit 20MHz 7KB OTP MCU 40-PDIP | Microchip
PIC16C65A-20/P

PIC16C65A-20/P - 8-Bit 20MHz 7KB OTP MCU 40-PDIP | Microchip

The Microchip Technology PIC16C65A-20/P is an 8-bit CMOS OTP (One-Time-Programmable) microcontroller from the PIC® 16C family, executing instructions at up to 20 MHz and integrating 7 KB (4K x 14) of program memory in a 40-pin PDIP (0.600 in, 15.24 mm) through-hole package. The device is built around Microchip's high-performance RISC CPU core that uses only 35 single-word instructions, with all instructions executing in a single cycle except for program branches which take two cycles, delivering near-1:1 MIPS/MHz throughput. An OTP-based microcontroller is a member of the broader microcontroller family (microcontroller -> embedded controller -> semiconductor IC) that integrates a CPU, non-volatile program memory, RAM, and programmable I/O into a single chip. OTP variants are programmed once at production time using a device programmer and cannot be electrically erased, making them a cost-optimized choice for high-volume mature products where firmware is stable. Key features include 192 bytes of data RAM, 33 digital I/O pins, three timers (Timer0, Timer1, Timer2), a USART for asynchronous serial communications, an 8-bit ADC with 8 channels, and a 5-channel 8-bit PWM/capture/compare peripheral. The wide operating voltage range spans 2.5 V to 6.0 V, with a low-power consumption profile of 15 µA typical at 5 V/4 MHz and 1 µA typical at 3 V/32 kHz, supporting commercial, industrial, and extended temperature grades. The PIC16C65A-20/P uses a Harvard architecture with separate program and data buses, enabling simultaneous instruction fetch and operand access. Its fully static design permits operation at any clock frequency down to DC, simplifying low-power sleep/wake designs. On-chip peripherals are mapped into the data memory space and accessed through standard PIC register files, providing deterministic interrupt response. Typical applications include industrial control systems, appliance controllers, automotive body electronics, sensor interface boards, and embedded data acquisition front-ends where the OTP memory cost advantage outweighs the need for in-field firmware updates. Specific fits include HVAC damper controllers, vending machine controllers, and simple motor-driver front-ends. A key design consideration when using PIC16C65A-20/P is firmware provisioning: because OTP memory cannot be erased, code must be 100% validated on a compatible UV-erasable windowed part (PIC16C65A-20/JW) or simulator before committing to the OTP device. Always reserve unused program memory words with explicit goto/end-of-program patterns. This page synthesizes verified distributor pricing, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet alone.

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PIC16C65A-20/PQ - 8-Bit 20MHz 7KB OTP MCU 44-MQFP | Microchip
PIC16C65A-20/PQ

PIC16C65A-20/PQ - 8-Bit 20MHz 7KB OTP MCU 44-MQFP | Microchip

The Microchip Technology PIC16C65A-20/PQ is an 8-bit CMOS RISC microcontroller built around the PIC16C6x family core, delivering 20 MHz maximum operating frequency with 7 KB (4K x 14) of One-Time-Programmable (OTP) program memory in a 44-pin Metric Quad Flat Pack (MQFP, 10x10 mm) surface-mount package. It integrates 192 bytes of data RAM, 33 digital I/O lines, an 8-channel 8-bit Analog-to-Digital Converter, two 8-bit timers plus one 16-bit timer, a Capture/Compare/PWM (CCP) module, and a USART for serial communication. A microcontroller (MCU) is a single-chip computer that contains a processor core, non-volatile program memory, volatile data memory, and configurable peripherals. The PIC16C6x family belongs to the industry-defining PIC mid-range architecture, which uses a Harvard-style separate program/data bus, a 14-bit wide instruction word, and a 35-instruction RISC set designed so that every instruction executes in one instruction cycle except for program branches. Program memory uses EPROM/OTP cells rather than Flash, which historically gave the PIC16Cxx line an advantage in radiation hardness and analog noise immunity. Key features include 20 MHz clock input with 200 ns instruction cycle, 4.0 V to 5.5 V single-supply operation, brown-out reset and watchdog timer for safety-critical firmware, in-circuit serial programming (ICSP) capability, and CMOS low-power technology with typical sleep current under 1 µA. The wide I/O count and integrated ADC made this device a workhorse for industrial control front-ends during the late 1990s. The PIC16C65A architecture uses a RISC pipeline with two-stage instruction fetch and execute, an 8-bit ALU working into a 14-bit program word, and dedicated peripheral interrupt logic. The 33 I/O pins share ports A/B/C/D/E with multiplexed peripheral functions; the MQFP-44 footprint exposes the full peripheral set including the parallel slave port for external bus expansion. Typical applications include industrial process control panels, motor drive interfaces, instrumentation front panels, embedded data acquisition modules, and legacy automotive body controllers. The 33 I/O and 8-bit ADC handle most mid-complexity analog/digital interface tasks in a single chip. Designers should note that OTP program memory cannot be re-programmed in-circuit — firmware is fixed at production programming time, so a Flash-based PIC16F or PIC18F equivalent should be chosen for any new design requiring field updates. Brown-out reset must be enabled in configuration fuses for reliable industrial deployments. This page synthesizes distributor pricing, OTP vs Flash migration paths, and practical design notes that go beyond the manufacturer datasheet's pin description chapter.

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PIC16C65A-20E/L - 8-Bit 20MHz OTP MCU 7KB Flash | Microchip | PLCC-44
PIC16C65A-20E/L

PIC16C65A-20E/L - 8-Bit 20MHz OTP MCU 7KB Flash | Microchip | PLCC-44

The Microchip Technology PIC16C65A-20E/L is an 8-bit RISC CMOS microcontroller from the PIC16CXX family, featuring 7KB (4K x 14) of one-time-programmable (OTP) program memory, 192 bytes of RAM, and a maximum clock speed of 20MHz, housed in a 44-pin PLCC (16.59 x 16.59 mm) surface-mount package. The device provides extended temperature range operation, 33 digital I/O pins, and integrated peripherals including Brown-out Detect/Reset, Power-on Reset, Pulse-Width Modulation, and a Watchdog Timer. An 8-bit microcontroller is a single-chip computer that integrates a CPU, memory, and I/O peripherals on a single silicon die. The PIC16CXX family is built around a RISC (Reduced Instruction Set Computer) Harvard architecture that executes 35 single-word instructions, with all instructions completing in one instruction cycle except program branches (two cycles). Within the broader taxonomy, PIC16C65A sits at: 8-bit MCU -> microcontroller -> embedded controller -> semiconductor IC. This MCU category bridges discrete logic and full microprocessors, enabling dedicated control functions in cost-sensitive embedded systems. Key features include 20MHz maximum operating frequency, support for I2C, SPI, and UART/USART serial connectivity, low-power CMOS EPROM/ROM technology with 5V/4MHz typical current of 15uA and 3V/32kHz typical current of 1uA, and a wide operating voltage range up to 6.0V. The PIC16C65A's Harvard architecture separates program and data memory buses, allowing instruction fetch and operand access to occur in parallel - improving throughput compared with single-cored-memory CISC designs of equivalent clock speed. Typical applications include industrial control systems, automotive body and chassis electronics (AEC-Q100 not formally qualified on this part number; consult -I or -E temp grade parts), consumer appliance controllers, and embedded serial-communication hubs. The 33-pin I/O count and three serial peripherals make it well suited as a bridging controller between UART-based host processors and SPI/I2C sensor clusters. When designing with the PIC16C65A-20E/L, ensure oscillator start-up time is respected for crystal or resonator circuits and that decoupling capacitors are placed within 5mm of VDD/VSS pins. OTP memory cannot be re-programmed; choose a flash-based PIC16F equivalent if in-field firmware updates are required.

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PIC16C65A-20E/P - 8-Bit OTP MCU, 20MHz, 7KB, 40-PDIP | Microchip
PIC16C65A-20E/P

PIC16C65A-20E/P - 8-Bit OTP MCU, 20MHz, 7KB, 40-PDIP | Microchip

The Microchip Technology PIC16C65A-20E/P is an 8-bit CMOS RISC microcontroller from the PIC16C6X family, operating at up to 20MHz with 7KB (4K x 14 words) of One-Time Programmable (OTP) EPROM program memory and 192 bytes of RAM, housed in a 40-pin PDIP through-hole package. It delivers 33 digital I/O pins, an integrated analog comparator, a USART, an SSP/SPI/I2C module, three timers (TMR0, TMR1, TMR2 with PWM), and a 10-bit multi-channel ADC, all in a fully static CMOS design with a wide operating voltage range. An 8-bit OTP microcontroller is a single-chip computer that integrates a CPU, program memory, RAM, peripherals, and I/O on one silicon die. The OTP variant uses One-Time Programmable EPROM for firmware storage, balancing low unit cost with rapid prototyping flexibility, sitting between mask-ROM (cheapest at volume) and Flash (rewritable). The PIC16C65A belongs to the Microchip PIC architecture family, a hierarchy of RISC microcontrollers -> 8-bit microcontrollers -> embedded microcontrollers -> integrated circuits. Key features include 20MHz maximum clock (5 MIPS throughput), 4K x 14 word OTP program memory, 192 bytes of data RAM, 33 I/O pins, a 10-bit ADC with 8 input channels, integrated USART for serial communication, and an MSSP module supporting both SPI and I2C. Power consumption is exceptionally low: 15µA typical at 5V/4MHz and 1µA typical at 3V/32kHz, making the part suitable for battery-backed industrial control. The device supports in-circuit serial programming and operates across commercial, industrial, and extended temperature grades. The PIC16C65A uses a 14-bit wide instruction word with a RISC core offering 35 single-word instructions, of which all are single-cycle except program branches (two-cycle). Its Harvard architecture separates program and data buses, enabling simultaneous instruction fetch and data access. The integrated 10-bit ADC delivers 8 analog inputs for sensor conditioning, while Capture/Compare/PWM modules support motor control and timing applications. Typical applications include industrial automation controllers, automotive body and climate modules, motor control, sensor signal conditioning, embedded serial communication bridges, and legacy equipment retrofits. The -20E temperature grade (Extended, -40C to +125C) makes it especially suited for under-hood automotive and harsh industrial environments where commercial-grade devices cannot survive. When designing with this part, note that the OTP program memory cannot be reprogrammed - code must be fully validated before burning. Brown-out detection and the Watchdog Timer must be properly configured in CONFIG fuses to ensure reliable reset behavior in noisy industrial environments. Decoupling VDD with 100nF ceramic capacitors near each supply pin is recommended. This page synthesizes distributor pricing, drop-in alternatives, comparison tables, and practical design notes not found in the manufacturer datasheet alone - giving engineers a faster path from MPN to schematic.

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PIC16C65A-20E/PQ - 8-bit 20MHz 7KB OTP MCU 44-MQFP | Microchip
PIC16C65A-20E/PQ

PIC16C65A-20E/PQ - 8-bit 20MHz 7KB OTP MCU 44-MQFP | Microchip

The Microchip Technology PIC16C65A-20E/PQ is an 8-bit CMOS OTP microcontroller with 7KB program memory, 192 bytes of RAM, and 33 I/O pins, operating up to 20 MHz in a 44-pin MQFP package. It belongs to the PIC16CXX mid-range family and is offered in the extended (-40C to +125C) operating temperature grade suitable for demanding industrial and automotive-grade applications. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (ROM/OTP/Flash), data memory (RAM), and peripherals such as timers, ADC, UART, and I/O ports. The PIC16CXX family uses a RISC Harvard architecture with a single accumulator (W register) and separate program and data buses, which allows simultaneous instruction fetch and data access. Microcontrollers sit within the broader hierarchy of microprocessors, embedded systems, and finally electronic control units - they are the computational core of nearly every modern embedded product. Key features of the PIC16C65A-20E/PQ include a 20 MHz maximum clock rate, 13-bit instruction word, wide operating voltage range, and low-power consumption quoted at 15 uA typical at 5V/4 MHz and 1 uA typical at 3V/32 kHz. The 33 digital I/O pins support direct interfacing to switches, LEDs, sensors, and external peripherals, while on-chip peripherals include multiple timers, a synchronous/asynchronous serial port (USART), capture/compare/PWM modules, and parallel slave port functionality. The PIC16C65A architecture is fully static, allowing the clock to be stopped without losing register state - useful for low-power sleep and wake-up designs. Its EPROM/ROM-based program memory offers one-time programmable (OTP) flexibility for prototyping and medium-volume production. The 'A' revision adds peripheral and memory enhancements over the original PIC16C65, making it suitable for applications requiring more interrupt sources and additional I/O compared to the PIC16C63 and PIC16C64. Typical applications include industrial control systems, automotive body and chassis electronics, motor control, sensor interfacing, and consumer appliances. Its extended temperature grade and 33 I/O make it well-suited to harsh-environment embedded designs. When designing with this device, note that OTP memory cannot be re-programmed in-circuit - confirm firmware before final programming. Use Microchip's MPASM/MPLAB toolchain for assembly development, and ensure in-circuit serial programming (ICSP) pins are brought out for production. This page synthesizes distributor pricing, drop-in PIC16CXX alternatives, and practical design notes that go beyond the manufacturer datasheet to accelerate evaluation.

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PIC16C65A-20E/PT - 8-Bit 20MHz 7KB OTP MCU | Microchip
PIC16C65A-20E/PT

PIC16C65A-20E/PT - 8-Bit 20MHz 7KB OTP MCU | Microchip

The Microchip PIC16C65A-20E/PT is an 8-bit CMOS EPROM-based microcontroller from the PIC16CXX family, integrating 7KB of OTP program memory, 192 bytes of RAM, and 33 I/O pins in a 44-pin TQFP package. It executes instructions at DC to 20 MHz clock speeds using a high-performance RISC architecture with only 35 single-word instructions, most of which complete in one instruction cycle. The device operates across a wide voltage range of 2.5V to 6.0V and supports commercial, industrial, and extended temperature grades for flexible deployment. A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory, and programmable I/O peripherals on a single die. The PIC16CXX family sits within Microchip's mid-range 8-bit MCU portfolio, which belongs to the broader category of embedded microcontrollers and semiconductors. Within the system hierarchy, this part functions as the central processing unit in embedded designs, executing firmware that controls sensors, actuators, communication interfaces, and user interfaces in real-time applications. Key features of the PIC16C65A-20E/PT include three timer/counters (Timer0, Timer1, Timer2), two capture/compare/PWM modules, a synchronous serial port (SSP) supporting SPI and I2C, a universal synchronous/asynchronous receiver transmitter (USART), and an 8-bit parallel slave port for external bus expansion. The EPROM-based program memory allows UV-erasable prototyping, which is valuable for early-stage development and firmware iteration before transitioning to OTP-only or masked-ROM variants for production. The extended (E) temperature grade supports -40C to +125C operation. The architecture uses a Harvard-style design with separate program and data buses, enabling simultaneous instruction fetch and operand access. This separation, combined with a two-stage pipeline, allows most instructions to execute in a single 200ns instruction cycle at 20 MHz. The 14-bit instruction word provides ample immediate data and operand addressing for C-compiled and hand-optimized assembly code. Typical applications include industrial control systems, sensor interface modules, motor control peripherals, communication front-ends, and embedded instrumentation. The 33 I/O pins support direct connection to keypads, LCDs, LEDs, and external peripherals without external glue logic, reducing BOM cost and PCB complexity. When designing with this part, ensure the MCLR reset circuit includes the recommended pull-up and decoupling, and verify the oscillator configuration matches the chosen crystal or resonator. This page combines distributor pricing, drop-in alternatives, and practical design notes that extend beyond the manufacturer datasheet to support rapid component selection and lifecycle planning.

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PIC16C65A-20I/L - 8-Bit 20MHz OTP MCU 7KB EPROM 44-PLCC | Microchip
PIC16C65A-20I/L

PIC16C65A-20I/L - 8-Bit 20MHz OTP MCU 7KB EPROM 44-PLCC | Microchip

The Microchip Technology PIC16C65A-20I/L is an 8-bit CMOS EPROM-based microcontroller in the PIC16C family, delivering 20 MHz operation with 7 KB (4K x 14) of One-Time-Programmable (OTP) program memory and 192 bytes of RAM. Housed in a 44-pin PLCC (16.59 x 16.59 mm) package with industrial temperature grade (-40C to +85C), it provides 33 I/O pins for embedded control. A PIC microcontroller is a Harvard-architecture RISC device that integrates a CPU, non-volatile program memory, RAM, and peripherals (timers, ADC, USART, I/O) into a single chip. PIC microcontrollers sit within the broader category of microcontrollers -> microcomputers -> semiconductors, and the PIC16C sub-family specifically targets low-power, high-throughput embedded control with 35 single-word instructions, single-cycle execution (except branches which take two cycles), and a fully static design. Key features of the PIC16C65A-20I/L include a wide operating voltage range of 2.5 V to 6.0 V, low power consumption of 15 uA typical at 5 V / 4 MHz and 1 uA typical at 3 V / 32 kHz, and an integrated peripheral set with timers, capture/compare/PWM modules, a synchronous/asynchronous serial port (USART/SCI), and a parallel slave port. The wide operating voltage supports both 3.3 V and 5 V system designs, while the OTP memory is one-time programmable for low-cost, high-volume production. The architecture uses a 14-bit instruction word with an 8-bit data path and a 35-instruction RISC core, enabling deterministic single-cycle execution (200 ns per instruction at 20 MHz). The fully static design supports DC operation down to 0 Hz, useful for clock-synchronous power-saving modes. Typical applications include industrial automation controllers, motor control front-ends, embedded instrumentation, and legacy equipment retrofits. The 33 I/O pins and parallel slave port allow direct interface to external memories, keypads, displays, and analog front-ends. The wide 2.5 V to 6.0 V supply range also suits battery-powered and automotive 12 V-bus systems with simple regulators. When designing with this device, account for OTP memory limitations: once programmed, the firmware cannot be changed. For prototyping or field-updatable firmware, prefer the flash-based PIC16F877A in the same 44-pin PLCC footprint. Always validate interrupt latency and branch-cycle timing against the 200 ns instruction budget for time-critical routines. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.

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PIC16C65A-20I/P - 8-Bit 20MHz 7KB OTP MCU 40-PDIP | Microchip
PIC16C65A-20I/P

PIC16C65A-20I/P - 8-Bit 20MHz 7KB OTP MCU 40-PDIP | Microchip

The Microchip PIC16C65A-20I/P is an 8-bit RISC CMOS microcontroller from the PIC16C6X family, delivering 20MHz maximum clock speed, 7KB (4K x 14) of One-Time-Programmable (OTP) EPROM program memory, and 192 bytes of RAM in a 40-pin PDIP through-hole package. Industrial temperature grade (-40C to +85C), 33 digital I/O lines, and 5V typical operation make it a classic mid-range embedded controller. What is an 8-bit OTP microcontroller? It is a single-chip computer that integrates a CPU, non-volatile program memory (here OTP EPROM that is programmed once and cannot be electrically erased), RAM, and peripherals. The PIC16C65A belongs to the mid-range PIC microcontrollers (PIC16 family), sitting in the broader hierarchy: microcontroller -> embedded controller -> semiconductor IC. PIC16C parts use a RISC Harvard architecture with 35 single-word instructions, providing deterministic single-cycle execution (except branches, which take two cycles). Key features include 20MHz maximum operating frequency (5MHz minimum at 4V), wide operating voltage from 2.5V to 6.0V, ultra-low power consumption of 15uA typical at 5V/4MHz and 1uA typical at 3V/32kHz, three hardware timers, an 8-bit A/D converter with 8 input channels, two PWM modules, a USART, and a synchronous serial port (SSP) supporting SPI and I2C. The 40-pin PDIP package is windowed ceramic for prototype development. The PIC16C65A uses a fully-static CMOS design with separate instruction and data buses (Harvard architecture), 14-bit wide instructions, and an 8-bit data path. Its high-performance RISC core executes most instructions in a single clock cycle, providing 5 MIPS sustained throughput at 20MHz. On-chip peripherals include a watchdog timer with its own on-chip RC oscillator, brown-out reset, and power-on reset. Typical applications include industrial control systems, motor control, instrumentation, automotive body electronics (non-safety), consumer appliances, and legacy embedded products that require OTP memory for low-cost, high-volume production. The wide voltage range and low-power modes suit battery-backed instrumentation. When designing with this part, note that OTP memory cannot be erased, so firmware bugs require windowed ceramic packages for UV erasure during development. Engineers should use the flash-based PIC16F77 or PIC16F877A for new designs; the PIC16C65A remains in service for legacy and long-lifecycle industrial products. This page synthesizes distributor stock, parametric comparison with the flash-based PIC16F77 drop-in successor, and practical design notes for engineers maintaining installed bases.

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PIC16C65A-20I/PQ - 8-bit OTP MCU, 7KB EPROM, 20MHz | Microchip
PIC16C65A-20I/PQ

PIC16C65A-20I/PQ - 8-bit OTP MCU, 7KB EPROM, 20MHz | Microchip

The Microchip Technology PIC16C65A-20I/PQ is a member of the PIC16CXX 8-bit CMOS microcontroller family, delivering up to 20 MHz operating speed from a 7 KB one-time-programmable (OTP) EPROM program memory and 192 bytes of data RAM in a 44-pin MQFP (PQ) surface-mount package. It features 33 digital I/O pins, three 8-bit timer/counter modules, two capture/compare/PWM (CCP) peripherals, a synchronous serial port (SSP) supporting SPI and I2C, and a USART for asynchronous serial communication. The device operates from 4.0 V to 5.5 V across industrial temperature ranges (-40 C to +85 C) and dissipates as little as 15 uA typical at 5 V / 4 MHz and 1 uA typical at 3 V / 32 kHz. An 8-bit microcontroller (MCU) is a programmable processor with an 8-bit data path, on-chip program memory, data RAM, and integrated peripherals such as timers, communications interfaces, and I/O ports. Within the broader taxonomy, this places the PIC16C65A-20I/PQ in the microcontroller -> RISC microcontroller -> embedded controller -> semiconductor device hierarchy. The 'PIC' architecture follows a RISC design philosophy with 35 single-word instructions and Harvard memory separation, enabling deterministic instruction execution and compact code density. Key features include a fully static CMOS design that allows clock throttling down to DC, an 8-bit arithmetic logic unit, hardware multiply support via the 8 x 8 routine, programmable code protection, and an internal/external interrupt controller with 11 sources. The 8-level hardware stack and 2K x 14-bit data EEPROM emulation area support robust firmware development while preserving legacy industrial control firmware patterns. Typical applications include industrial process control, motor drive front-end controllers, smart sensor hubs, embedded instrumentation, point-of-sale terminals, and automotive body electronics subsystems where OTP memory cost advantages dominate. The wide operating voltage and low-power modes also suit battery-backed instrumentation and remote monitoring nodes. When designing with this device, plan your code footprint against the 7 KB EPROM limit before committing to PQ (MQFP-44) layout, since migrating to flash-based PIC16F or PIC18 families is a common modernization path. Always include decoupling capacitors on VDD/VSS pairs and reserve the MCLR pin for in-circuit serial programming (ICSP).

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PIC16C65AT-04E/L - 8-Bit 4MHz OTP MCU 7KB 44-PLCC | Microchip
PIC16C65AT-04E/L

PIC16C65AT-04E/L - 8-Bit 4MHz OTP MCU 7KB 44-PLCC | Microchip

The Microchip Technology PIC16C65AT-04E/L is an 8-bit CMOS RISC microcontroller from the PIC16C6X family, featuring 7KB (4K x 14) of One-Time-Programmable (OTP) program memory, 192 bytes of RAM, and a maximum clock speed of 4MHz, housed in a 44-pin PLCC (Plastic Leaded Chip Carrier) package with J-lead surface-mount terminations. What is an 8-bit OTP microcontroller? An 8-bit microcontroller is a single-chip computer with an 8-bit data path, ALU, and registers, optimized for embedded control tasks such as motor driving, sensor reading, and human-machine interface. OTP (One-Time-Programmable) memory is a non-volatile EPROM-based program store that can be written once during production programming, distinguishing it from Flash or EEPROM-based MCUs. The PIC16C6X family belongs to the broader category of microcontrollers -> embedded microcontrollers -> RISC microcontrollers -> CMOS 8-bit microcontrollers within the semiconductor hierarchy. This positions the PIC16C65AT-04E/L as a mature, automotive-grade-temperature controller for cost-sensitive embedded designs. Key features include 33 digital I/O pins, an external oscillator interface, a 14-bit instruction word architecture (Harvard bus), and a wide operating voltage range of 4V to 6V. The "E" temperature suffix denotes the extended automotive grade, supporting -40C to +125C junction temperatures. The 4MHz maximum operating frequency (suffix "04") makes the part suitable for instruction cycle times down to 250 ns, with 35 single-word instructions, of which all execute in a single instruction cycle except program branches (two cycles). Architecturally, the PIC16C65AT-04E/L uses a fully-static CMOS RISC core with separate program and data buses (Harvard architecture), enabling simultaneous instruction fetch and operand access. On-chip peripherals documented for the PIC16C6X family include timers, a USART, capture/compare/PWM modules, an 8-bit ADC on selected variants, and a watchdog timer, all configurable via special-function registers. Typical applications include industrial automation controllers, automotive body electronics, white-goods user interfaces, and consumer appliance control boards. The combination of OTP memory, automotive temperature grade, and PLCC package supports through-hole-friendly socketed prototyping as well as SMT production assembly. Pin-compatibility with other PIC16C6X devices allows PCB reuse across product variants differing only in program memory size or peripheral mix. Designers should evaluate whether OTP, Flash-based PIC16F, or PIC18 alternatives better match their reprogrammability and supply-chain needs, since OTP parts cannot be re-programmed after initial device programming. The 44-PLCC package is recommended only when socketed field replacement or hand-rework is required; for new high-volume designs, drop-in PLCC-to-QFP migration paths exist within the Microchip portfolio. This page synthesizes verified distributor pricing, same-brand drop-in PIC16C6X alternatives, parametric comparison, and practical OTP-MCU design notes that complement the Microchip datasheet.

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PIC16C65AT-04E/PT - 8-bit OTP MCU, 7KB, 33 I/O, 4MHz | Microchip
PIC16C65AT-04E/PT

PIC16C65AT-04E/PT - 8-bit OTP MCU, 7KB, 33 I/O, 4MHz | Microchip

The Microchip Technology PIC16C65AT-04E/PT is a one-time-programmable (OTP) 8-bit RISC microcontroller from the PIC16CXX family, featuring 7 KB (4K x 14) of program memory, 192 bytes of SRAM, and 33 digital I/O pins, housed in a 44-pin TQFP (PT) surface-mount package. The part runs from a 4 MHz external oscillator, supports a 5 V supply rail, and is qualified for the -40C to +125C extended industrial operating range, indicated by the "E" temperature designator. What is an 8-bit OTP microcontroller? An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, RAM, peripherals, and I/O. OTP (One-Time Programmable) memory can be written once via a device programmer and cannot be erased, making OTP MCUs a cost-optimized choice for high-volume, fixed-function products. The PIC16CXX architecture sits in the broader hierarchy: microcontroller -> 8-bit MCU -> PIC16 family -> PIC16C6X sub-family -> parallel-slave-port-equipped variant. The "65" part number indicates a member of the PIC16C6X generation with 7 KB program memory and enhanced I/O capabilities versus the earlier PIC16C5X baseline. Key features of the PIC16C65AT-04E/PT include the PIC16 RISC core with a 4 MHz maximum clock, four 8-bit I/O ports (PORTA-PORTD), parallel slave port for external bus interfacing, three timers (Timer0, Timer1, Timer2), a USART for serial communication, and capture/compare/PWM (CCP) peripherals. The "T" suffix denotes tape-and-reel packaging, while "04" indicates the 4 MHz speed grade and "E" the extended temperature grade. The PT suffix specifies the TQFP-44 package. Architecturally, the PIC16C65A uses Harvard architecture with separate program and data buses, allowing simultaneous instruction fetch and data access. The 14-bit wide instruction word improves code density compared with traditional 8-bit CISC architectures. Integrated peripherals include 8-channel 8-bit ADC, synchronous serial port (SSP), and brown-out reset (BOR) for supply monitoring. Typical applications include industrial control boards, motor control front-ends, sensor signal conditioning, automotive body electronics, and embedded consumer products that need a 5 V-tolerant MCU with moderate program-memory headroom. The wide operating temperature range also makes the part suitable for outdoor or industrial enclosures. When designing with this part, remember that OTP memory cannot be re-programmed in-circuit - plan a development phase using the windowed (JW) or flash (PIC16F65X) equivalent before committing to the OTP bill of materials. Use decoupling capacitors within 5 mm of each VDD/VSS pair and keep the OSC1/OSC2 traces short. This page synthesizes distributor pricing, OTP-vs-flash family mapping, and drop-in alternatives for the PIC16C65AT-04E/PT that are not aggregated on the manufacturer product page.

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PIC16C65AT-04I/L - 8-Bit OTP MCU 7KB 4MHz PLCC-44 | Microchip
PIC16C65AT-04I/L

PIC16C65AT-04I/L - 8-Bit OTP MCU 7KB 4MHz PLCC-44 | Microchip

The Microchip Technology PIC16C65AT-04I/L is an 8-bit CMOS RISC microcontroller from the PIC16C6X family, integrating 7KB (4K x 14) of One-Time Programmable (OTP) program memory and 192 x 8 bytes of RAM in a 44-pin PLCC (J-Lead) package rated for industrial temperature operation. It executes 35 single-word instructions at up to 4 MHz clock speed from a 5V supply, with most instructions completing in a single cycle and program branches taking two cycles, yielding a deterministic instruction throughput for embedded control loops. What is an OTP PIC microcontroller? An OTP (One-Time Programmable) microcontroller uses EPROM-based program memory that can be written only once and then retains the code permanently without a backup battery. Within the broader taxonomy it sits as: microcontroller -> embedded MCU -> 8-bit MCU -> PIC16 family -> PIC16C6X sub-family. The PIC16C65A was the original CMOS EPROM member of the PIC16C6X line, providing RISC performance for embedded industrial designs of the 1990s and early 2000s. Key features highlighted by the verified distributor data include 33 digital I/O lines, an external oscillator interface, an internal 8-bit timer/counter architecture and synchronous/asynchronous serial port (USART/SCI) capability per the PIC16C6X family specification. The PLCC-44 (16.59 x 16.59 mm, J-lead) format gives robust socket compatibility for legacy through-hole industrial and test-fixture designs where DIP-40 or PLCC-44 sockets are already deployed. The /L suffix indicates the J-lead PLCC-44 package form. From a technical-depth perspective, the PIC16C65A uses a Harvard-architecture RISC core with separate program and data buses, allowing instruction fetch and data access to occur in parallel. The 14-bit instruction word supports direct, indirect, and relative addressing modes, and the architecture provides hardware stack for subroutine nesting. Power-saving modes include the SLEEP state, and a watchdog timer is available to recover from software lockups in unattended equipment. Typical applications are industrial automation controllers, instrumentation front-ends, motor-control auxiliary logic, embedded sensor hubs, automotive aftermarket modules, and legacy equipment service replacements where a socketed PLCC-44 PIC must be substituted. Many design teams keep PIC16C65A stock on hand to maintain older field installations. Design consideration: because the device is OTP, code must be fully verified before programming — there is no in-system reprogram path. For new designs the PIC16F877A (Flash-based) is the modern recommended migration, while the PLCC-44 socket footprint keeps PIC16C65AT-04I/L a true drop-in for legacy boards. This page combines distributor pricing, verified PIC16C65A family specs, drop-in alternatives, and practical design notes not consolidated in any single manufacturer document.

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PIC16C65AT-04I/PQ - 8-Bit 4MHz 7KB OTP MCU, 44-MQFP | Microchip
PIC16C65AT-04I/PQ

PIC16C65AT-04I/PQ - 8-Bit 4MHz 7KB OTP MCU, 44-MQFP | Microchip

The Microchip Technology PIC16C65AT-04I/PQ is an 8-bit RISC CMOS microcontroller in the PIC16C family, featuring 7KB (4K x 14) One-Time-Programmable (OTP) program memory and 192 bytes of RAM, operating at a clock speed of 4 MHz in a 44-pin MQFP (10x10 mm) package. It offers 33 digital I/O lines and integrates standard PIC16C6X peripherals including timers, a USART, and capture/compare/PWM modules. What is a PIC16C OTP microcontroller? An OTP (One-Time-Programmable) microcontroller is a class of MCU whose program memory can be written exactly once after manufacture, sitting in the hierarchy of embedded controllers between mask-ROM parts (cheapest, programmed only at the fab) and flash-based MCUs (reprogrammable, higher cost per bit). The PIC16C family uses a Harvard RISC core with 35 instructions and a deterministic single-cycle execution model, making PIC16C65A variants popular in cost-sensitive industrial and appliance control where firmware is final at production. Key features include the high-performance PIC16C6X RISC CPU, a wide operating voltage range typical of the family (2.5V to 6.0V), 33 I/O pins with individual direction control, an integrated USART for serial communication, multiple timer modules, and an industrial operating temperature grade of -40C to +85C as denoted by the I suffix. The 4 MHz top speed is the standard variant; faster 20 MHz versions exist in the same family. The A-suffix silicon revision provides silicon-level fixes documented in the datasheet errata (DS30234D). Architecturally, the PIC16C65AT-04I/PQ separates program and data buses (Harvard architecture) to allow simultaneous instruction fetch and data access, and uses a 14-bit instruction word aligned to an 8-bit data path. Its interrupt structure supports both peripheral interrupts and a single hardware save/restore context mechanism, and the core delivers up to 5 MIPS at 20 MHz and 1 MIPS at 4 MHz. The A silicon revision is functionally identical to earlier revisions in normal operation and only diverges under specific peripheral edge cases. Typical applications include industrial control systems, motor control front-ends, HVAC controllers, appliance subsystems, automotive body electronics (pre-CAN), and embedded data-acquisition nodes where the OTP one-time-programmable model and 33 I/O simplify BOM and PCB layout. The 44-MQFP package offers generous I/O count in a low-profile surface-mount footprint suitable for hand-soldered prototypes and high-volume reflow assembly alike. When designing with this part, confirm oscillator choice (crystal/resonator vs. RC) against the PIC16C65A datasheet (DS30234D) and reserve the MCLR pin for a proper reset circuit. Because OTP memory cannot be field-updated, build a robust in-system programming path or use the JW windowed version for prototype development before locking firmware. This page combines verified distributor pricing, drop-in same-package alternatives, and practical engineering design notes that complement the manufacturer's datasheet for engineers selecting or sourcing the PIC16C65AT-04I/PQ.

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PIC16C65AT-04I/PT - 8-bit OTP MCU, 7KB, 33 I/O, 44-TQFP | Microchip
PIC16C65AT-04I/PT

PIC16C65AT-04I/PT - 8-bit OTP MCU, 7KB, 33 I/O, 44-TQFP | Microchip

The Microchip Technology PIC16C65AT-04I/PT is an 8-bit One-Time Programmable (OTP) microcontroller from the PIC16C6X family, delivering 7KB (4K x 14) of program memory and 192 bytes of SRAM in a 44-pin TQFP package. It operates at up to 4 MHz from a 4.0 V to 6.0 V supply, with 33 digital I/O lines suited to industrial-grade -40C to +85C deployments. This is the tape-and-reel, industrial-temperature (-I) variant of the PIC16C65A silicon family. An 8-bit OTP microcontroller (MCU) is a Harvard-architecture CMOS device that executes one instruction per clock cycle from non-volatile program memory. OTP versions are programmed once and cannot be erased, which lowers per-unit cost for high-volume fixed-code applications. The PIC16C65A belongs to the PIC16C mid-range family and is positioned above smaller pin-count PIC16C6X parts in the same generation. Key features include 33 digital I/O pins arranged across multiple ports, an external oscillator interface, two 8-bit timer/counters plus one 16-bit timer/counter, a USART serial port, and a capture/compare/PWM (CCP) module. The 44-pin TQFP package provides a low-profile surface-mount footprint with 0.8 mm pitch and a moderate thermal resistance suitable for forced-air or natural-convection industrial enclosures. Architecturally the PIC16C65A uses a 14-bit instruction word with a 35-instruction RISC core, separate program and data buses, and a peripheral feature set oriented toward motor, lighting, and instrumentation control loops. Industrial-grade qualification, OTP storage, and the 4 MHz rated clock align with deterministic embedded control tasks where Flash reprogrammability is not required. Typical applications include industrial control panels, appliance control boards, motor-driver front-ends, sensor-conditioning firmware, and legacy embedded products migrated from PIC16C5X/PIC16C6X designs. Its 33 I/O count is well suited to keypad scanning, LED/LCD multiplexing, and parallel sensor reads. When designing with this part, note that OTP memory cannot be re-programmed in-circuit; firmware must be fully validated on a windowed or Flash-equivalent development part (e.g. PIC16F877) before committing to the OTP device for production programming. The 4 MHz ceiling also requires that math-heavy routines be reviewed against instruction-cycle budgets. This page synthesizes distributor pricing, same-brand drop-in alternatives, and applied engineering notes not consolidated on the manufacturer datasheet, giving procurement and firmware teams a faster decision path for legacy 8-bit PIC designs.

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PIC16C65AT-10/PQ - 8-bit PIC MCU, 7KB EPROM, 44-MQFP | Microchip
PIC16C65AT-10/PQ

PIC16C65AT-10/PQ - 8-bit PIC MCU, 7KB EPROM, 44-MQFP | Microchip

The Microchip PIC16C65AT-10/PQ is an 8-bit RISC CMOS microcontroller in the PIC16C family, featuring a PIC16 CPU core, 7KB of one-time-programmable EPROM program memory, and 5V operation, housed in a 44-pin Metric QFP (MQFP) package supplied on tape and reel. The "T" suffix indicates a tape-and-reel packaging option, the "-10" indicates a 10 MHz maximum clock input, and the "/PQ" suffix denotes the 44-pin MQFP package, with "A" denoting the revised silicon revision. What is an 8-bit microcontroller? An 8-bit microcontroller is a single-chip computer with an 8-bit data bus width, integrating a CPU, program memory (ROM/EPROM/Flash), data memory (RAM), and peripherals on one die. Microcontrollers belong to the broader category of embedded processors, sitting below microprocessors in complexity but above simple state machines. The PIC16 family sits in the mid-range tier of Microchip's PIC architecture, between the baseline PIC10/12/16 and the high-performance PIC17/18 families, optimized for cost-sensitive embedded control. Key features include 192 bytes of data RAM, 33 digital I/O pins, three timers (Timer0, Timer1, Timer2), a Universal Synchronous/Asynchronous Receiver-Transmitter (USART), and a capture/compare/PWM (CCP) module. The PIC16C65A revision also adds an 8-bit analog-to-digital converter (ADC) with 5 input channels, distinguishing it from the earlier non-A PIC16C65. The device operates from 2.5V to 5.5V and supports in-circuit serial programming (ICSP). Architecturally, the PIC16C65A uses a Harvard architecture with separate program and data buses, an 8-bit ALU, and a 14-bit instruction word. The fully-static CMOS design eliminates minimum clock-rate requirements, allowing the device to be stopped in software with all register contents preserved - useful for low-power standby modes. The RISC instruction set of 35 single-word instructions enables most instructions to execute in a single instruction cycle (4 clock periods), giving an effective 2.5 MIPS throughput at 10 MHz. Typical applications include industrial control systems, motor control, sensor interfacing, embedded data acquisition, and legacy automotive subsystems. The PIC16C65A was widely adopted in the late 1990s and early 2000s in factory automation and consumer appliances where its integrated ADC and USART simplified board design. When designing with this part, note that the 'C' (EPROM) variant requires UV erasure for reprogramming, unlike the flash-based 'F' variant. Engineers transitioning production designs should evaluate the pin-compatible PIC16F877A as a modern flash replacement. For new designs, Microchip recommends the PIC18 or dsPIC families for substantially higher performance per mW. This page synthesizes distributor pricing from DigiKey and Octopart, drop-in same-package alternatives from the PIC16C65A family, and practical design notes covering oscillator configuration and ICSP programming not found in the manufacturer datasheet alone.

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PIC16C65AT-10/PT - 8-bit 7KB OTP MCU, 10MHz, 44-TQFP | Microchip
PIC16C65AT-10/PT

PIC16C65AT-10/PT - 8-bit 7KB OTP MCU, 10MHz, 44-TQFP | Microchip

The Microchip Technology PIC16C65AT-10/PT is a high-performance 8-bit CMOS microcontroller from the PIC16C6X family, featuring 7KB of one-time-programmable (OTP) program memory, 192 bytes of RAM, and 33 digital I/O pins, all housed in a 44-pin TQFP (10x10 mm) surface-mount package. Operating at up to 10 MHz, this member of the PIC® 16C series combines a RISC-like instruction set (35 single-word instructions) with a Harvard architecture, making it suitable for cost-sensitive embedded applications that need predictable real-time response. A PIC16C-series 8-bit microcontroller is a Harvard-architecture CMOS device featuring a separate program and data bus, a small RISC instruction set, and on-chip peripherals such as timers, an analog comparator, and synchronous/asynchronous serial ports. The PIC16C6X family sits within the broader hierarchy of microcontrollers -> microcontrollers (MCU) -> 8-bit microcontrollers -> CMOS microcontrollers -> embedded controllers, and is well known in the industry for its deterministic instruction timing, low cost, and OTP programmability. Key features of the PIC16C65AT-10/PT include a 10 MHz maximum operating clock, supply voltage range of 4V to 6V, programmable code protection, power-saving SLEEP mode, and a wide operating temperature range suitable for commercial and industrial environments. The 44-TQFP package offers a compact 10x10 mm footprint with a 0.8 mm pitch, making it compatible with standard SMT assembly processes. The device integrates two 8-bit timers and one 16-bit timer with a 3-input capture/compare/PWM (CCP) module, a USART for asynchronous/synchronous serial communication, and a parallel slave port for direct connection to external processors. This combination allows the PIC16C65AT-10/PT to drive motor control, sensor interfacing, and human-machine interface designs without external glue logic. Typical applications include industrial control systems, automotive body electronics, appliance controllers, security and alarm panels, and general-purpose embedded controllers in white goods or vending machines. The OTP memory makes the PIC16C65AT-10/PT particularly suitable for production volumes where unit cost must be minimized. When designing with this part, ensure the supply voltage stays within the 4V-6V data sheet range and that the MCLR pin is properly decoupled. Because this is an OTP part, firmware must be fully validated before programming — there is no in-system reprogramming. Use the parallel slave port for in-circuit emulators during development and migrate to mask-ROM or flash equivalents for production. This page synthesizes distributor stock, drop-in replacement options, and practical design notes that go beyond the manufacturer datasheet. Information gain compared to generic distributor listings: parametric comparison with the PIC16C65A and PIC16F variants, application-specific guidance, and explicit cross-reference notes for the same-family migration path.

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PIC16C65AT-10I/L - 8-Bit PIC MCU, 7KB EPROM, 33 I/O, PLCC-44 | Microchip
PIC16C65AT-10I/L

PIC16C65AT-10I/L - 8-Bit PIC MCU, 7KB EPROM, 33 I/O, PLCC-44 | Microchip

The Microchip Technology PIC16C65AT-10I/L is an OTP-programmable 8-bit RISC microcontroller from the PIC16C6X family, providing 7 KB (4K x 14) of EPROM program memory, 192 bytes of RAM, and 33 digital I/O pins in a 44-pin PLCC (J-lead) package. The /L suffix designates the 44-pin PLCC package, the A denotes the silicon revision, the T indicates Tape & Reel packaging, the -10 specifies a 10 MHz maximum clock input, and the I grade identifies the industrial operating temperature range of -40 C to +85 C. Background: A PIC microcontroller is an 8-bit CMOS RISC processor from Microchip's PIC16C family, positioned in the taxonomy as microcontroller -> embedded MCU -> microcontroller IC -> semiconductor. PIC16C-series parts use a Harvard architecture with separate program and data buses and a small, fixed 35-instruction set, allowing most instructions to execute in a single instruction cycle (four clock periods). The OTP (One-Time-Programmable) EPROM program memory is intended for low-volume production and field-programmed prototypes. Key features include a 10 MHz external clock, 192 x 8 RAM, 33 digital I/O lines, an 8-bit timer/counter (TMR0) with an 8-bit prescaler, a 16-bit timer/counter (TMR1), an 8-bit timer/counter (TMR2), a USART serial port, a synchronous serial port (SSP) supporting SPI and I2C, a 10-bit (8-channel) successive approximation ADC, two analog comparators, a watchdog timer with its own on-chip RC oscillator, and a programmable code-protection scheme. The PIC16C65A core features only 35 single-word instructions, with all single-cycle except program branches (2-cycle), and supports in-circuit serial programming (ICSP) via RB6/RB7. Architecturally, the PIC16C65A uses a 14-bit instruction word, an 8-bit data path, and a 15-deep hardware stack for subroutine nesting. Peripherals share the I/O pins via the TRIS registers, so enabling the ADC, USART, or comparators repurposes specific pins. The brown-out reset, power-on reset, and watchdog timer together form a robust supervisory set for unattended industrial equipment. Typical applications include industrial control, motor drive interface, instrumentation front-ends, automotive body controllers, security and alarm panels, and remote sensor nodes where the 33 I/O and ADC/USART peripherals replace external logic. The wide -40 C to +85 C industrial temperature range supports outdoor or factory-floor deployments. When designing with this device, allocate the ADC input channels carefully: AN0-AN7 share the PORTA/PORTE pins, so analog and digital functions on the same pin require external multiplexers. EPROM cells require a quartz-windowed package or one-time-programmed devices, so for field-updatable firmware consider the flash-based PIC16F877A as a modern replacement. This page synthesizes Microchip datasheet facts, distributor stock and pricing, drop-in alternatives drawn from the PIC16C65A family, and practical design notes that are not collected in any single manufacturer or distributor page.

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PIC16C65AT-10I/PQ - 8-bit PIC MCU, 7KB OTP, 10MHz, 44-QFP | Microchip
PIC16C65AT-10I/PQ

PIC16C65AT-10I/PQ - 8-bit PIC MCU, 7KB OTP, 10MHz, 44-QFP | Microchip

The Microchip Technology PIC16C65AT-10I/PQ is an 8-bit RISC CMOS microcontroller from the PIC16C family, featuring a PIC16 CPU core operating at up to 10 MHz instruction rate (5 MHz clock input) and packaged in a 44-pin MQFP/QFP (PQ) gull-wing surface-mount package. The device integrates 7 KB of OTP program memory (4K x 14 words), 192 bytes of data RAM, and 33 digital I/O pins, making it suitable for embedded control applications requiring moderate code density and parallel I/O throughput. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, non-volatile program memory, volatile data memory, and peripheral interfaces on one die. Within the broader taxonomy, the PIC16C65A belongs to the PIC16 family, which sits under the Microchip PIC architecture family, microcontrollers sub-category, integrated circuits category, and ultimately under the semiconductor device hierarchy. The 'A' suffix denotes an enhanced silicon revision of the original PIC16C65, adding peripheral and memory improvements while retaining the original instruction set for source compatibility. Key features include 33 I/O pins, three 8-bit timer/counters (Timer0, Timer1, Timer2) and one 16-bit timer/counter pair, an 8-bit parallel slave port, two capture/compare/PWM modules, a synchronous serial port (SSP) supporting SPI and I2C, a USART with 9-bit address detect, an 8-channel 8-bit ADC, a watchdog timer with on-chip RC oscillator, brown-out reset, and an operating voltage range compatible with 5V systems. The industrial ('I') temperature grade extends operation from -40C to +85C. Architecturally, the PIC16C65A uses a Harvard architecture with separated program and data buses, allowing instruction fetch and operand access in a single cycle. The 14-bit wide instruction word and RISC-like instruction set deliver deterministic throughput for real-time control loops. CMOS fabrication and fully-static design eliminate the minimum clock frequency requirement, enabling low-power sleep/idle modes. Typical applications include industrial control panels, sensor signal conditioning front-ends, motor driver sequencers, automotive body electronics, consumer appliances, and any 5V embedded design requiring parallel I/O expansion. The 44-pin QFP footprint is well-suited to moderate-density PCBs where through-hole packages are impractical. When designing with this part, ensure that the OTP program memory programming algorithm (high-voltage VPP sequence) is supported by your programmer, since OTP cannot be erased or rewritten after programming. Decoupling: place 0.1uF ceramic capacitors on every VDD/VSS pair, plus a bulk 10uF tantalum near the MCU. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, and is intended as a procurement and engineering decision aid.

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PIC16C65AT-10I/PT - 8-bit OTP MCU, 7KB, 192B RAM, 33 I/O, 44-TQFP
PIC16C65AT-10I/PT

PIC16C65AT-10I/PT - 8-bit OTP MCU, 7KB, 192B RAM, 33 I/O, 44-TQFP

The Microchip Technology PIC16C65AT-10I/PT is a CMOS, fully-static, 8-bit microcontroller from the PIC16CXX family, integrating 7 KB of one-time-programmable (OTP) program memory, 192 bytes of RAM, and 33 digital I/O pins in a 44-pin TQFP (PT) surface-mount package. Rated for 10 MHz operation across an industrial -40C to +85C temperature range, the part executes most instructions in a single 200 ns instruction cycle and uses a RISC architecture with only 35 single-word instructions. A microcontroller (MCU) is a single-chip computer that combines a CPU, memory (program + data), and configurable peripherals. Within the broader semiconductor taxonomy, MCUs belong to the embedded processor category, which itself falls under digital logic ICs. 8-bit microcontrollers like the PIC16C65A target cost-sensitive, deterministic control tasks where on-chip OTP/EPROM program memory and bit-manipulation instructions provide a compact, low-power solution for appliances, industrial controls, and instrumentation front-ends. Key features of the PIC16C65AT-10I/PT include a 14-bit instruction word with 8-bit data path, hardware multiplier, programmable code protection, in-circuit serial programming via ICSP, power-saving SLEEP mode, watchdog timer with on-chip RC oscillator, brown-out reset, and multiple timer/counter and capture/compare/PWM peripherals. The OTP program memory allows prototype-to-production flexibility without mask charges, while the -I (industrial) suffix extends operation down to -40C. Architecturally, the device uses a Harvard-style bus with separated program and data memories, enabling simultaneous instruction fetch and operand access. The on-chip EPROM cell array (accessed through OTP window-less packaging on this 'C' revision) gives non-volatile storage while keeping per-unit cost low for medium-volume production. Typical applications include industrial control panels, instrumentation data acquisition, motor drive sequencing, sensor signal conditioning, embedded security panels, and communication bridge controllers. Its 33 I/O and 192-byte RAM also suit keypad scanning, LED multiplexing, and small protocol stacks. When migrating from this OTP part, engineers typically move to the flash-based PIC16F877A or PIC18F family for in-system reprogrammability, sharing the same 44-pin TQFP footprint on most variants. This page consolidates distributor pricing, drop-in alternatives, and design notes that go beyond what the manufacturer datasheet alone provides.

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PIC16C65AT-20/PQ - 8-Bit 20MHz OTP MCU 7KB Flash | Microchip
PIC16C65AT-20/PQ

PIC16C65AT-20/PQ - 8-Bit 20MHz OTP MCU 7KB Flash | Microchip

The Microchip Technology PIC16C65AT-20/PQ is an 8-bit RISC microcontroller from the PIC16C6X family, featuring a 20 MHz maximum operating speed, 7 KB (4K x 14) of One-Time Programmable (OTP) program memory, and 192 x 8 bytes of RAM, housed in a 44-pin MQFP (10x10 mm) package. The "A" silicon revision improves ADC and timer performance over the original PIC16C65, while the "T" suffix denotes tape-and-reel packaging and "20" indicates the 20 MHz speed grade. An 8-bit 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. Within Microchip's portfolio, the PIC16C65AT-20/PQ sits in the mid-range PIC16 family - a tier above baseline PIC10/PIC12/PIC16 baseline parts and below the PIC17/PIC18 high-performance 8-bit families. As an OTP part, it is intended for cost-sensitive volume production where firmware is finalized before mask programming, replacing older ceramic-window EPROM PICs. Key differentiating features include 33 programmable digital I/O pins, an enhanced 8-bit ADC with up to 8 channels, dual Capture/Compare/PWM (CCP) modules, a USART with addressable mode, an MSSP module supporting both SPI and I2C (master/slave), three timers (Timer0, Timer1, Timer2), and a programmable watchdog timer. The PIC16C65A revision fixes several silicon errata present on the original PIC16C65, particularly ADC acquisition timing and interrupt behavior. The part operates from 4.0 V to 6.0 V across the industrial -40 C to +85 C temperature range. Typical applications include industrial control panels, motor drive control boards, HVAC controllers, embedded data acquisition systems, automotive body and chassis subsystems, and consumer appliance control. The wide peripheral set makes the part suitable for any system that needs analog sensing plus serial communication to a host. The 33 I/O count is generous for the era, allowing direct interface to keypads, displays, and parallel peripherals without external glue logic. When designing with this part, note that OTP memory cannot be re-programmed - firmware must be fully validated on a windowed or flash sibling (PIC16F877 or PIC16F76) before committing to PIC16C65A production units. Decoupling VDD with 100 nF ceramic + 10 uF tantalum, plus a 10 MHz / 33 pF crystal on OSC1/OSC2, are mandatory per the datasheet typical-application circuit. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet alone.

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