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PIC16C77T-04E/PQ

PIC16C77T-04E/PQ - 14KB EPROM 8-Bit MCU, 20MHz, 44-MQFP | Microchip

The Microchip Technology PIC16C77T-04E/PQ is a member of the PIC16C7X mid-range family of 8-bit CMOS microcontrollers, featuring 14KB of one-time-programmable (OTP) EPROM program memory, 368 bytes of RAM, and 33 digital I/O lines. The device is housed in a 44-pin Metric Quad Flat Pack (MQFP) surface-mount package and operates at a maximum clock speed of 20 MHz, delivering 5 MIPS of throughput from a 4:1 instruction cycle ratio. An 8-bit microcontroller (MCU) is a single-chip computer with an 8-bit data bus, integrated CPU, program memory, RAM, and peripheral set optimized for embedded control. The PIC16C7X family belongs to the broader hierarchy of microcontrollers -> microcontrollers (MCU) -> microcontrollers -> embedded ICs -> semiconductors. The PIC16C77T variant adds a 'T' suffix indicating tape-and-reel packaging and an 'E' suffix denoting the Extended (automotive/industrial) temperature grade, enabling operation across -40C to +125C. Key features of the PIC16C77T-04E/PQ include an integrated 8-channel 8-bit Analog-to-Digital Converter (ADC), three hardware timers (Timer0, Timer1, Timer2), a Universal Synchronous Asynchronous Receiver Transmitter (USART) for serial communication, a Synchronous Serial Port (SSP) supporting SPI and I2C, and a capture/compare/PWM (CCP) module. The instruction set is RISC-based with only 35 single-word instructions to learn, supporting efficient code density. Architecturally, the device uses Harvard memory architecture with separate program and data buses, enabling simultaneous instruction fetch and data access. Its fully-static CMOS design offers low power consumption with sleep mode current below 1 uA typical. The on-chip EPROM requires a UV-erasable windowed package (the ceramic CERDIP variant, not the PQ plastic MQFP) for development, while the production MQFP version is OTP for cost-sensitive volume manufacturing. Typical applications include industrial automation controllers, automotive body and chassis ECUs, sensor signal conditioning, motor control peripherals, and consumer appliance control boards. The 33 I/O lines and on-chip ADC are well-matched to multi-channel analog sensing and PWM-driven actuator control without external glue logic. Designers should note the 4V to 5.5V supply voltage requirement, the need for a 20 MHz external crystal or resonator for full-speed operation, and the limited 14KB program memory which suits small-to-medium state machines and protocol stacks rather than large RTOS or GUI workloads. Industrial-grade temperature range is standard for the E-suffix variant. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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PIC16C77T-04E/PT

PIC16C77T-04E/PT - 8-Bit 4MHz OTP MCU, 14KB, 44-TQFP | Microchip

The Microchip Technology PIC16C77T-04E/PT is an 8-bit CMOS OTP microcontroller from the PIC16C7X mid-range family, delivering 14KB (8K x 14) of One-Time-Programmable program memory and 368 bytes of data RAM. It operates at a maximum clock frequency of 4MHz, integrates 33 digital I/O lines, and is housed in a 44-pin TQFP (10x10 mm) surface-mount package with industrial-grade -40C to +125C operating range. An 8-bit microcontroller (MCU) is a single-chip computer that uses an 8-bit data bus architecture, executes one instruction per cycle on a RISC-style core, and integrates CPU, memory, and peripherals on a single die. PIC16C7X parts belong to the mid-range PIC family — a hierarchy that traces from PIC microcontrollers -> mid-range 8-bit MCUs -> RISC microcontrollers -> embedded processors -> semiconductors. The 'C' suffix denotes the original CMOS OTP lineage, while the 'T-04' speed grade specifies a 4MHz oscillator maximum and 'E' marks the extended temperature variant. Key features of the PIC16C77T-04E/PT include on-chip peripherals such as a multi-channel 8-bit Analog-to-Digital Converter, two Capture/Compare/PWM modules, a USART serial port, an SSP/SPI/I2C peripheral, Brown-out Reset, Power-on Reset, Power Saving Sleep mode, a Watchdog Timer with its own on-chip RC oscillator, and programmable code protection. The PIC16C77 adds 33 I/O pins (vs 28 on the PIC16C74) and a higher pin count to support expanded parallel-port and analog-channel applications. Architecturally, the PIC16C77 uses a 14-bit instruction word, a 5-stage pipeline (fetch/decode/read/operate/write), and Harvard bus architecture with separate program and data memories. This RISC design delivers deterministic instruction timing — every instruction executes in one oscillator cycle except branches (two cycles) — simplifying real-time control loops in motor, power-conversion, and instrumentation designs. Typical applications for this part include industrial process control, motor drive signal conditioning, instrumentation front-ends with on-chip ADC, embedded control with serial networking (USART/SPI), and legacy factory automation upgrades where 5V-tolerant CMOS and 33 I/O are required. Designers also deploy it in test equipment, security panels, and HVAC controllers that need 8-bit deterministic control without an operating system. A critical design consideration is the OTP memory: code is programmed once and cannot be changed, so firmware must be fully validated before programming. Designers migrating to flash should evaluate the PIC16F877A (drop-in replacement family with flash), but for legacy 5V systems or harsh industrial environments the PIC16C77T-04E/PT remains a robust, time-tested choice. This page synthesizes distributor pricing, drop-in same-brand alternatives, and practical design notes not consolidated in the Microchip datasheet — including migration guidance from OTP to flash within the same 44-TQFP footprint and side-by-side comparison with the PIC16F877A for engineers modernizing 5V legacy designs.

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PIC16C77T-04I/L

PIC16C77T-04I/L - 8-Bit 4MHz MCU, 14KB OTP, 44-PLCC | Microchip

The Microchip Technology PIC16C77T-04I/L is an 8-bit RISC microcontroller from the PIC16C7X mid-range family, delivering 4 MHz core clock performance with 14KB (8K x 14) of One-Time Programmable (OTP) program memory, packaged in a 44-pin PLCC (J-Lead) form factor measuring 16.59 x 16.59 mm. It integrates 368 bytes of data RAM, 33 general-purpose digital I/O pins, and a rich set of on-chip peripherals including UART/USART, SPI, and I2C communication interfaces. An 8-bit microcontroller (MCU) is a single-chip computer that executes instructions on 8-bit data words, typically used in embedded control applications requiring deterministic timing, low power consumption, and simple peripheral integration. Within the broader semiconductor taxonomy, MCUs sit under microcontrollers, then integrated circuits, then semiconductors. The PIC16C7X family specifically occupies the mid-range tier of Microchip's 8-bit portfolio, sitting between baseline (PIC10/12/16) and enhanced mid-range (PIC17) families, and is characterized by integrated analog-to-digital converters and on-chip EEPROM/OTP program memory. Key features of the PIC16C77T-04I/L include an industrial operating temperature range (-40C to +85C per the I suffix), 14KB of OTP program memory for one-time field programming, three serial communication peripherals (UART/USART, SPI, I2C) for multi-device bus interfacing, and a 44-pin PLCC package with J-leads for socketed or surface-mount production. The 'T' suffix indicates Tape & Reel packaging, and the '04' speed grade denotes a 4 MHz maximum oscillator frequency. The /L suffix denotes the PLCC package variant. Architecturally, the PIC16C77T-04I/L employs a Harvard RISC architecture with separate program and data buses, a 14-bit instruction word, and a single accumulator-based working register (W) architecture. This design delivers deterministic instruction timing - most instructions execute in one oscillator cycle - which simplifies real-time control loop design. The device operates from a 4.0V to 5.5V single supply, drawing low quiescent current suitable for industrial and consumer embedded products. Typical applications include industrial control and automation, sensor interfacing, motor control front-ends, building automation, white goods control boards, and legacy embedded products originally designed around the PIC16C7X family. The wide I/O count and triple serial interface make it suitable for hub-style designs that aggregate multiple sensor inputs and forward data to a host controller. When designing with this device, plan for OTP memory programming early in the production flow - unlike flash-based PIC16F variants, code cannot be erased or rewritten once programmed. Use the UART/USART, SPI, and I2C peripherals to offload communication tasks from software loops and reserve timer resources for PWM and capture/compare functions where deterministic timing matters most. This page synthesizes distributor pricing, drop-in alternative part numbers, and practical design considerations that are not found in the manufacturer datasheet alone, helping engineers and procurement specialists evaluate the PIC16C77T-04I/L for new designs or production replenishment.

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PIC16C77T-04I/PQ

PIC16C77T-04I/PQ - 8-bit PIC MCU, 14KB EPROM, 4MHz | Microchip

The Microchip Technology PIC16C77T-04I/PQ is an 8-bit CMOS RISC microcontroller with 14KB EPROM program memory, 5V operating voltage, and a maximum clock speed of 4 MHz, housed in a 44-pin MQFP (PQ) package supplied on tape and reel. According to the Microchip PIC16C7X family datasheet, this device integrates a high-performance RISC CPU, 33 digital I/O pins, multiple timers, an analog-to-digital (A/D) converter, and synchronous/asynchronous serial ports (USART/SSP) for embedded control applications. An 8-bit PIC (Peripheral Interface Controller) microcontroller is a Harvard-architecture RISC processor that executes one instruction per clock cycle (except branches), offering deterministic timing and a compact instruction set well-suited to real-time control. PIC MCUs sit within the broader hierarchy of embedded microcontrollers -> microcontrollers -> microprocessors -> semiconductors. The PIC16C7X family is the mid-range PIC16CXX line, balancing cost, peripheral integration, and ease of development for industrial, consumer, and instrumentation designs. Key features of the PIC16C77T-04I/PQ include the 14KB one-time-programmable (OTP) EPROM for program storage, 33 I/O lines, an 8-channel 8-bit A/D converter, two 8-bit timers plus one 16-bit timer, a USART for serial communication, a Synchronous Serial Port (SSP) for SPI/I2C, and an industrial operating temperature range of -40C to +85C. The 4 MHz oscillator speed (suffix 04) provides sufficient throughput for control loops, sensor sampling, and human-machine interface tasks. Typical applications include industrial automation controllers, sensor signal conditioners, motor control peripherals, instrumentation front-ends, and embedded communication bridges. The integrated A/D converter and USART make it well-suited for data acquisition boards and remote telemetry. When designing with the PIC16C77T-04I/PQ, consider that OTP EPROM cannot be erased and reprogrammed - choose this variant for volume production where firmware is finalized, or use a windowed (JW) variant for prototype development. The MQFP-44 footprint also requires careful PCB thermal relief and ground plane design for noise immunity in mixed-signal systems. This page consolidates distributor pricing, drop-in same-package alternatives (PIC16C77-04I/PQ, PIC16C77-10I/PQ, PIC16C74BT-04I/PQ), parametric comparison data, and practical design guidance that goes beyond a single datasheet page, helping procurement and design engineers evaluate the PIC16C77T-04I/PQ for new designs and legacy replacements.

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PIC16C77T-04I/PT

PIC16C77T-04I/PT - 8-bit OTP MCU, 14KB, 4MHz, TQFP-44 | Microchip

The Microchip Technology PIC16C77T-04I/PT is a member of the PIC16C7X mid-range family of CMOS, fully-static, 8-bit microcontrollers featuring 14KB (8K x 14) of One-Time Programmable (OTP) program memory, 368 bytes of RAM, 33 digital I/O lines, and a 4 MHz instruction-cycle core, packaged in a 44-pin TQFP (10x10 mm) surface-mount housing supplied on Tape & Reel. A PIC microcontroller (Peripheral Interface Controller) is a RISC-based embedded computing device integrating a CPU core, non-volatile program memory, RAM, peripheral set (timers, ADC, communication ports), and I/O into a single IC. Within the Microchip taxonomy, PIC MCUs are organized into families (PIC10/12/14/16/18/24/32) by core width, instruction set and peripheral count; the PIC16C series sits in the legacy OTP/EPROM mid-range tier that pre-dates the flash-based PIC16F generation. The PIC16C77 is the 14KB-memory member of the PIC16C7X line with on-board 8-bit ADC. Key features of the PIC16C77T-04I/PT include a Harvard RISC architecture with 14-bit instructions, hardware multiplier-free ALU executing most instructions in a single 4 MHz cycle, an integrated 8-channel/10-bit (or 12-bit on the 16C77) analog-to-digital converter, two capture/compare/PWM modules, a USART, an SSP/SPI/I2C port, a watchdog timer, brown-out reset, and power-on reset, plus five 8/16-bit timers for total peripheral flexibility. The architecture relies on EPROM-based code storage which makes the part suited to mature production runs where reprogramming is not expected; the wide 4.0 V to 6.0 V supply range and -40 °C to +85 °C industrial operating band suit factory-floor controllers. Compared with the flash-based PIC16F877 equivalent, the PIC16C77 offers OTP code protection but requires UV-erase windows or windowless-OTP programming strategies in production. Typical applications include industrial automation (sensor conditioning + ADC), consumer appliance controllers, automotive body and chassis subsystems, embedded control with analog front ends, and legacy designs requiring EPROM code security. Industrial designers choose it where deterministic single-cycle execution, mature toolchain support (MPLAB + Hi-Tech C), and EPROM code protection outweigh the lack of in-circuit reprogramming. A core design consideration is OTP code security versus the higher cost-per-bit of EPROM versus flash: design firmware must be fully validated before burn, and an emergency code-change strategy requires replacement stock. Layout tip: keep analog and digital ground returns separated under the 44-TQFP, place the AVdd/Vdd decoupling pair within 5 mm of the pins, and respect the ADC acquisition-time (Tacq) formula to avoid sampling-channel errors. This page consolidates distributor pricing, drop-in compatible same-package alternatives and practical design notes not found in the manufacturer datasheet, giving procurement and engineering a single decision-ready reference.

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PIC16C77T-10/L

PIC16C77T-10/L - 8-Bit 10MHz OTP MCU 14KB Flash | Microchip

The Microchip Technology PIC16C77T-10/L is an 8-bit RISC microcontroller from the PIC® 16C family, operating at up to 10 MHz with 14 KB (8K × 14) of One-Time Programmable (OTP) program memory and 368 bytes of data RAM. Housed in a 44-pin PLCC (Plastic Leaded Chip Carrier) package measuring 16.59 × 16.59 mm with J-lead terminals, the device integrates an 8-channel 8-bit A/D converter, three timers, a USART, and 33 digital I/O lines for embedded control. A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory, and programmable I/O peripherals on a single silicon die. The PIC16C7x family uses a Harvard RISC architecture with separate program and data buses, enabling single-cycle instruction execution except for program branches. The OTP variant is programmed once at production using a device programmer and is intended for low-volume or mature designs where code stability is established. Key features include 14 KB OTP program memory, 368 bytes of RAM, 256 bytes of EEPROM data storage, an internal 8-bit A/D converter with 8 input channels, a synchronous/asynchronous serial port (USART/SCI), and 33 digital I/O pins arranged across multiple ports. The instruction set contains 35 single-word instructions, allowing compact code generation in C or assembly. The commercial temperature grade (0 °C to +70 °C) targets consumer and industrial instrumentation. The PIC16C77 architecture is built around a 14-bit instruction word, an 8-bit data path, and a multi-source interrupt controller with 14 interrupt sources. The ADC operates from the device's VDD supply and supports successive-approximation conversion with user-selectable conversion clock. The on-chip USART supports both asynchronous (SCI) and synchronous modes for connection to RS-232 transceivers, SPI peripherals, or LIN bus controllers. Typical applications include industrial process control, motor control front-ends, security and access control panels, HVAC thermostats, smart sensor signal conditioning, and automotive body electronics pre-CAN. The 33 I/O pins and 8-channel ADC suit systems where multiple analog sensors and discrete digital actuators must be serviced from a single 5 V supply. Design considerations include OTP programming via the ICSP interface (RB6/RB7), the need for a regulated 5 V supply, and a recommended 100 nF decoupling capacitor near each power pin pair. Because OTP parts cannot be reprogrammed in-circuit, designers should reserve a few unused I/O pins for debugging straps and consider a socket during prototyping. This page synthesizes distributor stock visibility, drop-in 44-PLCC alternatives from the same PIC16C7x family, and practical design notes that go beyond the manufacturer datasheet summary.

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PIC16C77T-10/PQ

PIC16C77T-10/PQ - 8-bit CMOS MCU, 14KB OTP, 44-MQFP | Microchip

The Microchip Technology PIC16C77T-10/PQ is an 8-bit CMOS OTP-based RISC microcontroller with 14KB of program memory and 368 bytes of RAM, housed in a 44-pin Metric Quad Flat Pack (MQFP) package. It executes instructions in a 200 ns cycle (10 MHz oscillator / 4), integrates an 8-channel 8-bit A/D converter, two 8-bit timers and one 16-bit timer with capture/compare/PWM, and exposes 33 digital I/O pins. The device is supplied on tape-and-reel in the /PQ package and targets embedded control applications requiring integrated analog. An 8-bit OTP microcontroller (one-time-programmable microcontroller) is a single-chip computer that stores program code in non-volatile memory that can be written once by the user and read many times thereafter, replacing masked-ROM parts with field-programmable flexibility. The PIC16C77 sits in Microchip's PIC16CXX mid-range family hierarchy (microcontroller -> 8-bit MCU -> mid-range MCU -> PIC16C7x family), which sits beneath the broader PIC16C family and above baseline PIC12/PIC16 parts. Its RISC Harvard architecture separates program and data buses, enabling single-cycle instruction fetch and deterministic timing. Key features include 14KB OTP program memory, 368 bytes RAM, 33 I/O lines rated for direct LED drive, an 8-channel 8-bit A/D converter with selectable reference, two 8-bit timers plus one 16-bit timer/counter with capture/compare/PWM, a synchronous serial port (SSP) supporting SPI and I2C, and a USART with addressable transmit/receive. Brown-out reset, watchdog timer with on-chip RC oscillator, and code-protection fuse bits round out the on-chip peripherals. The PIC16C77T-10/PQ is part of the PIC16C7X family built on Microchip's CMOS process, sharing peripherals and pinout with PIC16C73/74/76/77 variants. Power consumption is in the milliampere range at 10 MHz, and the device supports operation from 3.0 V to 6.0 V. Industrial and extended temperature grades are available, and Microchip recommends the flash-based PIC16F77 as a newer alternative. Typical applications include industrial process control, instrumentation, motor control, sensor signal conditioning, and consumer appliance control. In a process-control loop the on-chip A/D and PWM peripherals remove the need for external converters, while the synchronous serial port glues directly to SPI/I2C sensors. When designing with this part, note that the OTP memory cannot be re-programmed in-circuit, so choose a flash-based PIC16F77 for development. Decouple VDD/VSS with 0.1 uF ceramic caps placed within 5 mm of the pins, and use the MCLR pull-up to prevent spurious resets during power-up. This page synthesizes current distributor inventory, drop-in same-package alternatives and practical PCB design notes not collected in any single source.

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PIC16C77T-10/PT

PIC16C77T-10/PT - 14KB OTP 8-Bit MCU, 10MHz, 44-TQFP | Microchip

The Microchip Technology PIC16C77T-10/PT is an 8-bit OTP (One-Time Programmable) microcontroller from the PIC® 16C family, featuring 14KB (8K x 14) of program memory, 368 bytes of RAM, and 33 digital I/O pins, housed in a 44-pin TQFP (PT) package rated for 10MHz operation. The "T" suffix indicates Tape and Reel packaging, while "-10" specifies the 10MHz maximum clock speed, and "/PT" denotes the 44-pin TQFP (10x10 mm) surface-mount package. An OTP microcontroller is a class of programmable logic device whose program memory can be written only once, using either a parallel or serial programmer, after which the code becomes permanent. The PIC16C77 belongs to Microchip's PIC16C7x mid-range family — an 8-bit Harvard-architecture microcontroller -> mid-range MCU -> 8-bit microcontroller -> embedded controller hierarchy — widely adopted in cost-sensitive industrial, automotive, and consumer designs where flash reprogrammability is not required and unit cost is the dominant constraint. Key features include 14KB OTP program memory organized as 8K x 14 words (14-bit instruction word width typical of the PIC16C family), 368 bytes of data RAM, 33 I/O lines, an 8-channel 8-bit Analog-to-Digital Converter (ADC), a Universal Synchronous/Asynchronous Receiver/Transmitter (USART), a Capture/Compare/PWM (CCP) module, two 8-bit timers plus one 16-bit timer, a watchdog timer with its own on-chip RC oscillator, and a brown-out reset (BOR) circuit for supply-voltage monitoring. Architecturally the PIC16C77T-10/PT uses Microchip's enhanced mid-range RISC core, providing a single-cycle instruction fetch with a 200ns instruction cycle at 20MHz (proportionally 400ns at 10MHz). The 14-bit wide instruction word allows most instructions to be executed in a single instruction cycle, and the Harvard memory architecture separates program and data buses for predictable, deterministic real-time behavior. The on-chip ADC, USART, and CCP peripherals share I/O pins via a peripheral pin-select multiplexer. Typical applications include industrial process-control sensor interfaces, HVAC thermostat and valve actuators, automotive body controllers and dashboard clusters, consumer appliance control boards, and remote sensor/transmitter nodes. The 33 I/O and 8 ADC channels are well-matched to multi-signal acquisition boards, while the 44-pin TQFP footprint enables compact board layouts. The wide 2.5V–6.0V operating range supports both 3.3V and 5V designs. When designing with the PIC16C77T-10/PT, reserve one I/O line for in-circuit programming (even though OTP cannot be re-flashed in-circuit) so factory programming can be verified, and budget at least 4 bytes of stack depth for interrupt nesting. Note that the 44-TQFP variant has lower thermal mass than the 44-PLCC variant, so derate maximum operating temperature in enclosed enclosures. This page synthesizes current distributor pricing, drop-in same-package alternatives (PIC16C77-10/PT, PIC16C77T-10I/PT, PIC16C76T-10/PT) and practical design notes — engineering context not found in the standalone Microchip datasheet.

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PIC16C77T-10E/L

PIC16C77T-10E/L - 10MHz 8-Bit OTP MCU 14KB EPROM 44-PLCC | Microchip

The Microchip Technology PIC16C77T-10E/L is an 8-bit CMOS RISC microcontroller from the PIC16C7X mid-range family, offering 14KB (8K x 14) of One-Time-Programmable (OTP) EPROM program memory and operating at up to 10MHz clock speed. It is housed in a 44-pin PLCC surface-mount package and operates from a 5V nominal supply (4V to 5.5V range). The 'E' suffix denotes the extended industrial temperature range of -40C to +125C, qualifying the device for harsh-environment deployment. What is an OTP microcontroller? An OTP (One-Time-Programmable) microcontroller is a microcontroller whose on-chip program memory can be written only once after manufacture, using a standard EPROM programming algorithm. It sits within the broader hierarchy: microcontroller -> embedded controller -> semiconductor IC. OTP parts occupy the middle ground between mask-ROM (cheapest, factory-programmed) and Flash (rewritable, more expensive) variants, making them a cost-effective choice for mature, stable firmware designs in volume production. Key features include 192 bytes of RAM, 33 digital I/O lines distributed across multiple ports, an integrated multi-channel 8-bit Analog-to-Digital Converter (ADC), two Capture/Compare/PWM modules, a USART serial port, and a synchronous serial port (SSP) supporting SPI and I2C. The Harvard RISC architecture executes most instructions in a single 200ns cycle at 10MHz, and the 14-bit instruction word delivers compact, deterministic code for embedded control loops. Typical applications include industrial process control, automotive body and chassis electronics, motor control, smart sensors, and consumer appliances requiring 5V-tolerant digital I/O with on-chip analog conversion. The combination of extended temperature range and OTP memory makes this device particularly suitable for cost-sensitive, high-reliability designs where firmware is locked at production time. When designing with the PIC16C77T-10E/L, ensure the MCLR reset circuit, oscillator configuration, and ICSP programming pins are routed to accessible test points, since OTP parts cannot be re-flashed for firmware corrections. The 44-PLCC footprint provides generous ground and power pin assignments that simplify PCB layout for mixed-signal designs. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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PIC16C77T-10E/PT

PIC16C77T-10E/PT - 8-Bit 10MHz OTP MCU, 14KB Flash | Microchip

The Microchip Technology PIC16C77T-10E/PT is an 8-bit PIC mid-range microcontroller running at 10 MHz, housed in a 44-pin TQFP (PT) surface-mount package. It integrates 14 KB (8K x 14) of One-Time Programmable (OTP) program memory, 368 bytes of data RAM, 33 digital I/O lines, and an 8-channel 8-bit Analog-to-Digital converter, making it a single-chip solution for embedded control with mixed-signal I/O. A microcontroller (MCU) is a programmable single-chip computer that combines a CPU, non-volatile program memory, working RAM, and a rich set of on-chip peripherals such as timers, communication ports, and analog interfaces. The PIC16C77T-10E/PT belongs to the PIC16C7X family, which sits in Microchip's mid-range PIC architecture, positioned between baseline (PIC10/12/14) and enhanced mid-range (PIC17) families, and is targeted at cost-sensitive industrial, automotive, and consumer applications that need A/D conversion alongside digital control. Key features include a Harvard RISC core with 14-bit instruction word, 8-channel 8-bit A/D converter with input multiplexing, two 8-bit timers plus one 16-bit timer/counter, a synchronous serial port (SSP) supporting SPI and I2C, a USART for asynchronous serial communication, capture/compare/PWM (CCP) modules, and an internal watchdog timer with on-chip RC oscillator for safe recovery. The device operates from 4.5 V to 5.5 V across the -40 °C to +125 °C industrial temperature range, and the 'E' suffix denotes the extended industrial grade. The PIC16C77T-10E/PT uses Microchip's classic OTP EPROM cell, which allows fast prototyping and short production runs but cannot be electrically erased once programmed; for high-volume or field-upgradable designs, the flash-based PIC16F877 is the modern equivalent in the same TQFP-44 footprint. The 'T' suffix indicates Tape and Reel packaging, and the '/PT' suffix specifies the 10x10 mm TQFP-44 package. Typical applications include industrial process control, instrumentation, motor control, sensor interfacing, HVAC controllers, automotive body electronics, and embedded data-acquisition front-ends. The combination of OTP memory, an integrated A/D converter, and USART connectivity allows the device to read multiple analog sensors, run closed-loop control algorithms, and report status over a serial link in a single chip. When designing with this device, allocate careful pin budgeting because several pins are multiplexed with the A/D converter and the parallel slave port; verify that the chosen analog inputs are not also required as digital I/O in the application, and follow Microchip's recommended decoupling (a 0.1 µF ceramic close to VDD with a bulk electrolytic) to keep the analog readings clean. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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PIC16C77T-10I/L

PIC16C77T-10I/L - 8-Bit 10MHz MCU, 14KB OTP, 44-PLCC | Microchip

The Microchip Technology PIC16C77T-10I/L is an 8-bit CMOS RISC microcontroller from the PIC16C7X mid-range family, featuring 14KB of One-Time Programmable (OTP) program memory (8K x 14 words), 368 bytes of RAM, and 33 digital I/O lines, housed in a 44-pin PLCC package (J-Lead, 16.59 x 16.59 mm). It executes instructions at a 10 MHz clock rate (200 ns instruction cycle) and integrates a multi-channel 8-bit Analog-to-Digital Converter alongside three timer modules and two Capture/Compare/PWM (CCP) peripherals. An 8-bit microcontroller (MCU) is a small single-chip computer built around an 8-bit data bus, typically using Harvard architecture with separate program and data memory spaces. Within the broader taxonomy, this part belongs to: 8-bit MCU -> microcontroller -> embedded processor -> semiconductor IC. The PIC16C family uses Microchip's enhanced mid-range RISC core, optimized for deterministic interrupt response and compact code density, making PIC MCUs the dominant choice for cost-sensitive, low-power embedded control applications such as motor control, sensor interfacing, and user-interface handling. Key features of the PIC16C77T-10I/L include 14KB of OTP program memory allowing custom firmware to be written exactly once during manufacturing, 368 bytes of data RAM for scratchpad operations, and a hardware USART for asynchronous serial communication. The integrated ADC provides up to eight analog input channels at 8-bit resolution, ideal for sensor reading and battery monitoring. An industrial temperature grade (-40C to +85C) supports deployment in harsh environments, and the 44-pin PLCC package allows easy prototyping on through-hole carriers while still being surface-mountable for production. Synchronous Serial Port (SSP) and I2C support allow the part to communicate with external EEPROMs, real-time clocks, and sensor ICs. Architecturally, the PIC16C77T-10I/L uses a 14-bit instruction word with a two-stage pipeline, providing deterministic one-instruction-per-cycle execution except for program branches. The brown-out reset, power-on reset, and watchdog timer with its own on-chip RC oscillator enhance field reliability in unattended installations. The 33 I/O pins can source/sink up to 25 mA each, enabling direct LED drive and small relay coil activation without external drivers. Interrupt-on-change inputs simplify user-interface keypads and rotary-encoder reading. Typical applications include industrial process controllers, HVAC fan and damper actuators, automotive body modules, white-goods user interfaces, and small-form-factor sensor hubs. Its ADC and PWM peripherals also make it a fit for battery chargers and uninterruptible power supply (UPS) control boards. When designing with this device, engineers should allocate one I/O pin for the MCLR reset, allow a 100 ms decoupling window for power-on reset, and follow Microchip's recommended in-circuit serial programming (ICSP) header pinout to retain firmware-upgrade capability on the production board. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found on individual datasheet pages.

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PIC16C77T-10I/PQ

PIC16C77T-10I/PQ - 14KB OTP 8-bit MCU 10MHz | Microchip

The Microchip Technology PIC16C77T-10I/PQ is an 8-bit CMOS RISC microcontroller from the PIC16C7X family featuring 14 KB of one-time programmable (OTP) program memory, 368 bytes of RAM, and 33 digital I/O lines, housed in a 44-pin MQFP (PQ) surface-mount package. It executes instructions in 200 ns at a 10 MHz clock and operates from a single 5 V supply, targeting cost-sensitive embedded control applications that require integrated analog peripherals. A microcontroller (MCU) is a single-chip computer containing a CPU, program memory, RAM, and configurable peripherals such as timers, communication ports, and analog-to-digital converters. The PIC family uses a Harvard RISC architecture, executing one instruction per clock cycle for deterministic real-time performance. The PIC16C7X sub-family adds on-chip 8-bit A/D conversion, placing these MCUs in the broader taxonomy: MCU -> 8-bit MCU -> RISC MCU -> PIC16CXX mid-range family. Key features include 14 KB (8K x 14) OTP program memory, 368 bytes of data RAM, 33 I/O pins, an integrated 8-bit A/D converter with multiple channels, three timers, a synchronous serial port (SSP) supporting SPI and I2C, a USART, and a capture/compare/PWM module. The 44-pin MQFP (PQ) package supports industrial-grade -40C to +85C operation, indicated by the 'I' suffix, and 'T' denotes Tape and Reel packaging. The '10' designator identifies the 10 MHz maximum clock frequency variant. Architecturally, the PIC16C77 uses a 14-bit instruction word with a hardware stack of 8 levels and an 8-level deep interrupt structure. The CMOS static design allows the clock to be slowed or stopped for low-power operation. The 'C' in PIC16C77 indicates OTP (one-time programmable) program memory, which is suitable for production runs where the firmware is finalized before manufacturing. Typical applications include industrial control systems, instrumentation, motor control, sensor interfacing, and embedded consumer products where A/D conversion, communication peripherals, and ample I/O are required. Its integrated ADC and multiple peripherals suit process monitoring and small closed-loop control designs. When designing with this device, plan for OTP programming - firmware must be verified on a windowed (JW) or flash equivalent before committing to OTP production. The Microchip PIC16F77 (flash-based) is the recommended migration path; according to the Microchip product page, PIC16F77 is a newer, flash-programmable alternative that offers identical pinout and peripherals. This page synthesizes distributor pricing, drop-in compatible alternatives, and practical design notes not found in the standalone manufacturer datasheet.

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PIC16C77T-20/L

PIC16C77T-20/L - 8-Bit 20MHz OTP MCU 14KB | Microchip PLCC-44

The Microchip Technology PIC16C77T-20/L is an 8-bit RISC microcontroller from the PIC16C family operating at 20 MHz, featuring 14KB of One-Time Programmable (OTP) program memory organized as 8K x 14 words, 368 bytes of RAM, and 33 digital I/O pins, housed in a 44-pin PLCC package (16.59 x 16.59 mm). A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, working RAM, peripheral set (timers, ADC, communication ports), and I/O into one device. The PIC16C family implements a Harvard-architecture 8-bit RISC core optimized for deterministic interrupt response and compact code density; the PIC16C77 specifically belongs to the PIC16C7x mid-range family that adds a 10-bit successive-approximation ADC and synchronous/asynchronous serial ports to the base mid-range core, classifying it as a power management and control IC family member used in embedded control. Key features include a 14-bit instruction set, internal oscillator option, programmable code protection, an 8-channel 10-bit ADC, two capture/compare/PWM modules, a USART with 9-bit address masking, an I2C/SPI synchronous serial port, an 8-level hardware stack, and a brown-out reset circuit. The wide operating voltage range of 2.5 V to 6.0 V supports battery-powered and industrial applications. The architecture uses a 14-bit wide program memory bus and an 8-bit data bus. With one instruction per internal clock cycle (4 oscillator periods per instruction), the device delivers 5 MIPS at 20 MHz. The 368-byte RAM is complemented by a hardware multiplier accessible via single-cycle MOVFW and MULLW instructions, enabling efficient arithmetic for control loops. Typical applications include industrial automation controllers, motor control, instrumentation front-ends, sensor signal conditioning, white-goods control boards, and automotive body/comfort subsystems (where the part is rated for the automotive-qualified temperature range variant, indicated by an /L window). When designing with this OTP part, note that program memory cannot be erased electrically; engineers should use a windowed or flash equivalent (e.g., PIC16F877) for prototyping. Decoupling VDD/AVDD with 100 nF and 10 uF ceramics placed within 5 mm of the pins is recommended. This page synthesizes distributor pricing, parametric comparison with same-family alternatives, and design considerations not found in the standalone manufacturer datasheet.

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PIC16C77T-20/PT

PIC16C77T-20/PT - 8-Bit 20MHz 14KB OTP MCU | Microchip

The Microchip Technology PIC16C77T-20/PT is an 8-bit RISC 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 lines, all integrated in a 44-pin TQFP surface-mount package. It operates at a maximum clock frequency of 20MHz and runs from a single 5V supply, making it a member of Microchip's mid-range PIC16CXX family of CMOS, fully-static microcontrollers. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, working RAM, and peripheral interfaces into one package. The PIC16C77 belongs to the PIC16 mid-range architecture, an 8-bit RISC family that executes one instruction per clock cycle (except branches), giving it deterministic throughput for embedded control. Within the broader PIC16CXX hierarchy, the PIC16C77 sits at the top of the family with the largest memory and highest I/O count, above the PIC16C73/74/76/765 cousins. As an OTP (One-Time Programmable) part, its EPROM program memory is written once via a programmer and is not electrically erasable, distinguishing it from the later flash-based PIC16F77. Key features include 14KB of OTP program memory (8K x 14-bit words), 368 bytes of data RAM, 33 I/O pins, an integrated 8-channel 8-bit analog-to-digital converter, two Capture/Compare/PWM modules, a USART serial port, and a synchronous serial port (SSP) supporting SPI and I2C. The 20MHz maximum clock delivers 5 MIPS of instruction throughput, and the wide 2.5V-5.5V operating range (extended on the -I suffix variant) supports both 3.3V and 5V system designs. The PIC16C77 uses a Harvard architecture with separate program and data buses, a 14-bit instruction word optimized for compact code, and Microchip's mid-range core. The CMOS static design means the clock can be stopped without losing internal state, making the part well suited to battery-backed applications. Peripherals are mapped into a single linear data-memory space and share a common interrupt structure. Typical applications include industrial automation controllers, automotive body and chassis ECUs (the -I grade), appliance control boards, instrumentation front-ends, security system panels, and any embedded design requiring on-chip ADC plus serial communication. The 33 I/O pins and 8-channel ADC also suit multi-signal data-acquisition front-ends. When designing with this part, note that OTP memory requires a device programmer with EPROM/UV-erase support and that the 'T' suffix indicates tape-and-reel packaging for high-volume assembly. For new designs prefer the flash-based PIC16F877 successor unless EPROM-based qualification is mandatory. This page synthesizes distributor pricing, same-package drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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PIC16C77T-20E/L

PIC16C77T-20E/L - 8-Bit 20MHz 14KB OTP MCU | 44-PLCC | Microchip

The Microchip Technology PIC16C77T-20E/L is an 8-bit, 20MHz CMOS OTP microcontroller in a 44-pin PLCC package, belonging to the PIC16C7X mid-range family with integrated analog-to-digital converters. It delivers 14KB (8K x 14 words) of One-Time Programmable program memory, 368 bytes of data RAM, 33 digital I/O lines, and an 8-channel 8-bit ADC, all supplied from a 4.0V to 5.5V rail. The 'T' suffix denotes Tape & Reel packaging and the 'E' suffix indicates the Extended automotive temperature grade of -40C to +125C. An OTP microcontroller (One-Time Programmable) is a type of MCU whose program memory can be written exactly once after manufacture using a device programmer, then behaves like mask ROM for the remainder of the part's life. OTP MCUs sit within the broader hierarchy of microcontroller -> embedded controller -> semiconductor, and historically have been used for high-volume cost-sensitive products where firmware is finalized before production. The PIC16C7X family is part of Microchip's mid-range architecture, which adds peripheral integration (ADC, USART, capture/compare/PWM) over baseline PIC16C5X parts while retaining the classic 14-bit instruction set. Key differentiating features of this part include: an integrated 8-channel 8-bit A/D converter for mixed-signal sensing; a USART module for asynchronous serial communication; two CCP (Capture/Compare/PWM) modules for timing and motor control; an extended operating temperature range suitable for under-hood and industrial environments; and 33 digital I/O lines organized across multiple ports. The RISC-like architecture executes most instructions in a single 200ns cycle at 20MHz (4-clock instruction cycle), providing deterministic interrupt latency. The on-chip watchdog timer, power-on reset, brown-out detect, and code protection features support unattended and field-deployed installations. Typical application domains for the PIC16C77T-20E/L include automotive body and chassis ECUs, industrial control boards, white-goods motor controllers, HVAC fan and damper actuators, sensor-signal conditioning front ends with ADC, and legacy embedded systems migrating from ceramic-windowed EPROM parts to a cheaper OTP footprint. The wide temperature grade makes it especially appropriate for under-dash instrumentation and engine-bay peripherals. When designing with this part, place a 0.1uF decoupling capacitor within 5mm of each VDD/VSS pair, route the 20MHz crystal traces symmetrically with short stub lengths, and keep ADC reference traces away from PWM switching nodes. Code-protect the device once firmware is finalized to prevent bit-stream readback. Because OTP memory cannot be updated, provision an external debug header or a flash-equivalent PIC16F77 if in-field firmware updates are required. This page synthesizes distributor pricing, parametric alternatives, and practical design notes not found in the manufacturer datasheet alone, providing actionable engineering guidance for sourcing, replacement, and EMC-aware PCB layout.

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PIC16C77T-20E/PT

PIC16C77T-20E/PT - 8-Bit 20MHz OTP MCU 14KB | Microchip

The Microchip Technology PIC16C77T-20E/PT is an 8-bit PIC microcontroller featuring 14KB (8K x 14) One-Time Programmable (OTP) program memory, 368 bytes of RAM, 33 digital I/O lines, and a 20MHz maximum operating frequency in a 44-pin TQFP (10x10mm) surface-mount package. This enhanced-range (-40C to +125C) part is supplied on tape and reel and is part of the PIC16C7x mid-range family that has served industrial and automotive embedded designs for decades. A PIC microcontroller is a compact, single-chip computer built around the Harvard architecture with separate program and data buses. The PIC16C family specifically refers to the classic mid-range 14-bit instruction-set core introduced in the 1990s, which sits within Microchip's broader product hierarchy of 8-bit MCU -> microcontroller -> embedded controller -> semiconductor. OTP program memory means the device is programmed once at production time and cannot be erased, making it suited for high-volume, cost-sensitive applications where firmware is stable. Key features of the PIC16C77T-20E/PT include an 8-channel 8-bit Analog-to-Digital Converter, three timer modules, a Universal Synchronous Asynchronous Receiver Transmitter (USART), a Capture/Compare/PWM module, and an extended operating temperature range of -40C to +125C for harsh-environment deployments. The 33 I/O pins provide generous connectivity for sensors, actuators, and communication peripherals. Architecturally, the PIC16C77 uses a RISC instruction set with 35 single-word instructions and a 14-bit instruction word, enabling deterministic execution at four oscillator clocks per instruction cycle. The OTP EPROM cell array is fabricated on a non-volatile process that provides high noise immunity and decades of data retention at room temperature, though it cannot be electrically erased in-circuit. Typical applications include industrial control systems, automotive body and powertrain subsystems, appliance controls, sensor signal conditioning, motor control front-ends, and embedded communication bridges. The wide temperature range makes it especially well suited to under-hood automotive modules and outdoor industrial equipment. When designing with the PIC16C77T-20E/PT, plan for in-circuit programming via Microchip's ICSP interface because OTP cannot be reprogrammed. Always budget development cycles around a flash-equivalent PIC16F or PIC18F device for code iteration, then migrate to OTP for production. This page synthesizes distributor pricing, drop-in same-package alternatives from Microchip's own PIC16C and PIC16F families, and practical design guidance not found in the standalone datasheet, giving engineers an actionable reference beyond the manufacturer document.

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PIC16C77T-20I/L

PIC16C77T-20I/L - 8-Bit 20MHz 14KB OTP MCU 44-PLCC | Microchip

The Microchip Technology PIC16C77T-20I/L is an 8-bit CMOS RISC microcontroller from the PIC16C7X mid-range family, operating at 20 MHz with 14 KB (8K x 14) of One-Time Programmable (OTP) program memory and 368 bytes of RAM, housed in a 44-pin PLCC (Plastic Leaded Chip Carrier) package with tape-and-reel packaging. An OTP microcontroller is a flash-like non-volatile memory device that can be programmed exactly once after manufacture; unlike UV-erasable EPROM, the windowed CERDIP variant, OTP cannot be erased and re-programmed, which lowers per-unit cost for high-volume production while still providing deterministic in-system program retention. The PIC16C77T-20I/L sits inside the broader PIC16CXX mid-range family (PIC16CXX -> PIC16 mid-range -> 8-bit MCU -> microcontroller -> embedded IC), positioning it as a legacy industrial-grade controller for cost-sensitive embedded designs. Key features include 33 digital I/O lines, an integrated 8-channel 8-bit A/D converter, and three serial communication peripherals: I2C (Inter-Integrated Circuit, also known as IIC), SPI (Serial Peripheral Interface), and UART/USART (Universal Asynchronous/Synchronous Receiver-Transmitter). Two 8-bit timers and one 16-bit timer/counter support PWM generation and event timing, while 256 bytes of EEPROM data memory retain configuration and calibration values across power cycles. The device runs from a 4.0 V to 5.5 V single supply and is specified across the -40C to +85C industrial temperature range (I suffix). Architecturally, the PIC16C77T-20I/L uses a Harvard architecture with separate program and data buses, a single accumulator (W register) working model, and a 14-bit instruction word optimized for compact code density. Its 20 MHz oscillator delivers a 200 ns instruction cycle, and the integrated A/D converter uses successive-approximation conversion with analog input multiplexing across eight channels, suitable for slow-changing sensor signals. Typical applications include industrial process control, motor drive interface logic, instrumentation data acquisition, automotive body electronics (non-safety), HVAC control boards, and consumer appliance controllers. Its combination of OTP memory, broad peripheral set, and industrial temperature range makes it well-suited for high-volume embedded products where code stability is required over the product lifecycle. A primary design consideration with this device is the OTP memory - firmware must be fully verified before programming, because no field re-programmability is possible. Engineers targeting in-field firmware updates should select a Flash-based PIC16F7X equivalent (such as PIC16F877A-I/L) with the same 44-pin PLCC footprint. This page synthesizes distributor pricing, parametric drop-in alternatives, and practical engineering guidance not consolidated on any single distributor or manufacturer page, providing a one-stop engineering reference for the PIC16C77T-20I/L.

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PIC16C77T-20I/PQ

PIC16C77T-20I/PQ - 14KB OTP 8-bit MCU, 20MHz | Microchip

The Microchip PIC16C77T-20I/PQ is an 8-bit CMOS RISC microcontroller from the PIC16C7X family, featuring 14KB (8K x 14) of One-Time Programmable (OTP) program memory, 368 bytes of RAM, and a 20 MHz maximum operating frequency, housed in a 44-pin MQFP (PQ) windowed CERDIP-compatible tape-and-reel package. It integrates an on-chip 8-channel 8-bit Analog-to-Digital Converter and supports supply voltages from 4.0V to 5.5V across an industrial temperature range of -40C to +85C. A microcontroller (MCU) is a single-chip computer containing a CPU, memory (program + data), and programmable I/O peripherals. The PIC16C7X family belongs to Microchip's mid-range PIC architecture, sitting between the baseline PIC16C5X and the enhanced PIC16C9X/PIC17C families. This 8-bit RISC core executes most instructions in a single cycle, providing deterministic timing that is critical for real-time control loops, while the 14-bit instruction word balances code density against register width for embedded control workloads. Key features include Harvard architecture with separate program and data buses, 33 digital I/O pins, three timer/counter modules, two Capture/Compare/PWM (CCP) peripherals, a USART with addressable RS-485 mode, and the previously mentioned 8-bit ADC. The 'I' suffix denotes the industrial temperature grade, while '20' indicates the 20 MHz speed option and 'T' denotes tape-and-reel packaging; the /PQ package code corresponds to a 44-pin Metric Quad Flat Pack (MQFP) windowed body. The OTP EPROM program memory supports prototyping and low-volume production, while 368 bytes of data RAM and 256 bytes of EEPROM (typical for this family) provide working storage for variables and non-volatile parameters. The integrated ADC and rich peripheral set allow the PIC16C77T-20I/PQ to replace multiple discrete components in a system. Typical applications include industrial process control, motor control front-ends, instrumentation, automotive sensor interface modules, and embedded control boards where an integrated ADC reduces BOM cost. The wide operating voltage and industrial temperature grade also suit factory automation nodes. Designers should plan for in-circuit serial programming (ICSP) and reserve a quartz crystal or resonator footprint for clock stability, since timing accuracy drives both UART baud-rate integrity and ADC conversion precision. Note that 'PQ' denotes MQFP windowed ceramic packaging, which is unusual for industrial runs; verify your assembly process supports this package before scaling production. This page synthesizes distributor pricing, drop-in same-package alternatives, and design guidance that goes beyond the manufacturer datasheet to help engineers select and second-source the PIC16C77T-20I/PQ.

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PIC16C77T-20I/PT

PIC16C77T-20I/PT - 8-Bit 20MHz OTP MCU 14KB Flash 44-TQFP | Microchip

The Microchip Technology PIC16C77T-20I/PT is an 8-bit RISC microcontroller from the PIC® 16C family, operating at up to 20MHz with 14KB (8K x 14) of One-Time Programmable (OTP) program memory, 368 bytes of RAM, and 33 digital I/O pins, housed in a 44-pin TQFP (10x10 mm) surface-mount package. The "T" suffix indicates Tape & Reel packaging, the "20" denotes the 20MHz maximum clock speed, "I" indicates the industrial -40C to +85C temperature grade, and "/PT" identifies the TQFP package. A PIC microcontroller is a Harvard-architecture RISC device from Microchip's PIC family, widely used as embedded controllers in industrial, automotive, and consumer products. PIC16C-series devices belong to the mid-range PIC family that bridges 8-bit simplicity with rich peripheral integration, making them suitable for applications requiring ADC, PWM, USART, and I/O control without the cost of a 16-bit MCU. The OTP variant (C-series) is programmed once during production and is ideal for high-volume mature products. Key features include 8-level hardware stack, 14-bit wide instruction word, 35 instructions, 200ns instruction cycle at 20MHz, integrated 8-channel 8-bit ADC, two 8-bit timers plus one 16-bit timer, synchronous/asynchronous USART with 9-bit address detect, capture/compare/PWM module, and Brown-out Reset (BOR). The 44-TQFP package supports surface-mount assembly with standard 0.80mm lead pitch and exposes 33 general-purpose I/O plus dedicated oscillator, MCLR, and power pins. Typical applications include industrial automation control, motor control, sensor interfacing, automotive body electronics, HVAC systems, security panels, and white-goods consumer appliances. The OTP memory makes it best suited for mature, high-volume designs where firmware is finalized and firmware updates are not expected in the field; for in-field updateable applications, the Flash-based PIC16F77 (pin-compatible migration path) is preferred. When designing with this part, ensure decoupling capacitors (0.1uF ceramic) are placed close to VDD/AVDD/VSS pins and that the MCLR pin is pulled high through a resistor for normal operation. The PIC16C77 is a legacy OTP part - confirm supply-chain availability before starting new designs; the Flash-based PIC16F877 is the recommended modern alternative for new product development.

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PIC16C781-I/SO

PIC16C781-I/SO - 8-bit MCU 1.75KB OTP 20MHz 20-SOIC | Microchip

The Microchip Technology PIC16C781-I/SO is an 8-bit CMOS PICmicro® microcontroller with 1.75 KB (1K x 14) One-Time-Programmable (OTP) program memory, 128 bytes of RAM, and 16 digital I/O lines, housed in a 20-pin SOIC (0.295 inch / 7.50 mm body width) package. It operates from a 5V supply (2.0 V to 5.5 V extended range per the datasheet) at up to 20 MHz instruction-clock speed, integrating an 8-bit A/D converter, an 8-bit D/A converter, an operational amplifier, dual analog comparators, and Microchip's Programmable Switch-Mode Controller (PSMC) peripheral on-chip. An OTP microcontroller is a microcontroller whose program memory is written once (by the user or factory) and is non-erasable. OTP devices sit between the development-friendly Flash MCUs and the higher-cost, factory-masked ROM MCUs in Microchip's product hierarchy, making them attractive for low-to-medium volume production where the cost-per-unit advantage over Flash is significant but full ROM mask NRE is not justified. The PIC16C781 is a member of Microchip's PIC16 mid-range 8-bit core family and uses a 14-bit instruction word. Key on-chip features include 1.75 KB OTP program memory, 128 bytes of data RAM, 16 digital I/O pins with individual direction control, an 8-channel 8-bit A/D converter, an 8-bit D/A output, a single on-chip op-amp, two analog comparators, a PSMC (Programmable Switch-Mode Controller) module for direct power-supply regulation, an 8-bit timer/counter (TMR0), a 16-bit timer/counter (TMR1), and a Watchdog Timer with its own on-chip RC oscillator for maximum reliability. The PSMC makes the PIC16C781 particularly distinctive: it allows the MCU to directly implement closed-loop control of switching power supplies without an external PWM controller IC. Typical applications include SMPS (switch-mode power supply) primary-side control, battery chargers, LED drivers, fan/motor speed controllers, and any 5V system that needs on-board analog signal conditioning plus 8-bit digital control. The integrated op-amp and comparators let the designer build current-sense amplifiers and feedback loops around the core without external analog ICs. When designing with this part, note that OTP memory cannot be reprogrammed in-circuit; firmware must be programmed before or during board assembly using a Microchip device programmer. The PSMC peripheral requires careful PWM dead-time and frequency programming to avoid shoot-through in the external FET bridge. Industrial-temperature range is denoted by the "I" suffix.

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PIC16C781/JW

PIC16C781/JW - 8-Bit 20MHz MCU, 1.75KB EPROM, 20-CDIP Windowed | Microchip

The Microchip Technology PIC16C781/JW is an 8-bit PIC16C-series microcontroller built around the company's enhanced mid-range RISC core, running at up to 20 MHz and integrating up to 1.75 KB (1K x 14) of One-Time-Programmable (OTP) EPROM program memory in the JW windowed ceramic CDIP variant. The device delivers 13 digital I/O pins, 128 bytes of RAM, and the highest level of mixed-signal analog peripheral integration ever offered in a 20-pin PIC16C part. According to the Microchip PIC16C781 datasheet, six fully-integrated analog modules are multiplexed onto the part, including a 12-bit (8+4) slope ADC, an 8-bit DAC, two analog comparators with programmable reference, a bandgap voltage reference, a zero-cross detect, and an integrated voltage regulator that supports operation from 2.5 V to 5.5 V without external regulation. Background: An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, RAM, I/O peripherals, and often analog blocks onto one silicon die. The PIC16C mid-range family is the classic Microchip architecture that uses a Harvard memory layout, a small RISC instruction set with fixed 14-bit instruction width, and a 35-instruction opcode table. The /JW suffix specifically designates a UV-erasable windowed ceramic CDIP package used for prototype development and code iteration, whereas production units ship in OTP plastic packages (/P, /SO, /SS). Key features include 14-bit wide instructions, 8-level deep hardware stack, internal oscillator support, watchdog timer with on-chip RC oscillator, in-circuit serial programming (ICSP), and Brown-out Reset. The PIC16C781 is engineered for analog-intensive embedded control, replacing multi-chip op-amp and ADC front-ends with a single MCU. The architecture pairs a 20 MHz oscillator with a four-clock-per-instruction cycle, delivering up to 5 MIPS sustained throughput. The 12-bit slope ADC achieves up to 50 ksps by digitising via a 1-bit comparator against a programmable ramp, eliminating the need for a dedicated SAR core. Its 8-bit DAC, two comparators, and 2.048 V bandgap reference can be combined to build fully software-defined closed-loop systems. Typical applications include industrial process control loops, sensor signal conditioning, battery chargers with constant-current/constant-voltage profiles, mixed-signal instrumentation front-ends, automotive body controllers (non-AEC-Q), and consumer appliance user interfaces. The integrated analog set makes the PIC16C781 especially attractive where a low-cost MCU must replace several discrete analog ICs. When designing, ensure VDD decoupling uses a 0.1 uF ceramic placed within 5 mm of the supply pin and that MCLR is pulled high through 10 kohm for normal operation. The /JW windowed package allows approximately 1000 EPROM erase cycles under UV exposure, after which data retention degrades. This page synthesises distributor pricing, package-level drop-in equivalents within the same Microchip PIC16C family, and practical design notes not found in the manufacturer datasheet alone.

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PIC16C781T-I/SO

PIC16C781T-I/SO - 8-bit MCU 1.75KB OTP, 16 I/O, SOIC-20 | Microchip

The Microchip Technology PIC16C781T-I/SO is an 8-bit CMOS microcontroller built on the PIC16 mid-range RISC core with 1.75KB of one-time-programmable (OTP) program memory, 128 bytes of RAM, and 16 digital I/O lines, housed in a 20-pin SOIC (SO) package supplied on tape-and-reel. Operating from a 5V supply, the PIC16C781 is a derivative of the PIC16C7xx family and is differentiated by an unusually rich analog peripheral set for its era: an A/D converter, a D/A converter, an operational amplifier, two analog comparators, and a Programmable Switch-Mode Controller (PSMC) peripheral — a combination that previously required several discrete analog ICs around a conventional PIC. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program and data memory, and peripheral interfaces on one die. The PIC16C781 belongs to the 8-bit mid-range PIC16 family, which sits between Microchip's baseline 8-bit cores and the enhanced 16-bit cores in Microchip's product hierarchy. Within power management and signal conditioning systems, the on-chip op-amp, DAC, and PSMC allow this MCU to implement closed-loop control of a switching supply, charge pump, or sensor excitation circuit without external analog components, which reduces board area and BOM cost. Key features of the PIC16C781T-I/SO include 1.75KB of OTP program memory, 128 bytes of data RAM, 16 bidirectional I/O pins, an 8-bit ADC, an 8-bit DAC, an on-chip op-amp, two analog comparators, a Programmable Switch-Mode Controller (PSMC), and a synchronous serial port supporting both SPI and I2C modes. The 20-pin SOIC package is industry-standard, and the -I temperature grade supports industrial ambient operation from -40C to +85C, suitable for factory-floor equipment, instrumentation, and ruggedized embedded modules. The PIC16C781's architecture uses a Harvard layout with a separate instruction and data bus, and its RISC instruction set is fixed at 35 single-word instructions, allowing most instructions to execute in a single instruction cycle. The on-chip PSMC is the architecturally novel peripheral: it can be configured as a current-mode or voltage-mode PWM controller with programmable dead-time and frequency, and it interfaces to the on-chip op-amp and comparators so that current/voltage feedback loops can be closed entirely inside the silicon. This makes the part attractive for switching power supplies, motor drivers, and LED drivers where an external PWM controller would otherwise be required. Typical applications include SMPS (switched-mode power supply) primary-side control, LED driver controllers with analog dimming, sensor signal conditioning with on-chip amplification, battery charger control loops, motor speed control, and industrial instrumentation front ends. Because the program memory is OTP rather than flash, the PIC16C781T-I/SO is generally used in mature, high-volume production designs where code is finalized and field reprogramming is not required. When designing with this part, note that OTP memory requires one-time programming in production — engineering development should use the PIC16F877 or PIC16F1936 flash equivalent, then transition to the OTP die for cost-down. Decoupling the VDD/VSS pins with 100 nF ceramics placed within 5 mm of each pin is critical, and the analog supply (AVDD/AVSS) should be filtered with a ferrite bead to preserve ADC and DAC linearity. This page synthesizes distributor pricing as of 2026-09-19, drop-in alternatives from the same PIC16 family, and practical design notes not consolidated in the manufacturer datasheet itself.

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PIC16C781T-I/SS

PIC16C781T-I/SS - 8-bit MCU 1.75KB OTP 20MHz SSOP-20 | Microchip

The Microchip PIC16C781T-I/SS is an 8-bit CMOS OTP-based microcontroller in a 20-pin SSOP (Shrink Small Outline Package) that integrates an unusually rich set of analog peripherals for its class. According to the manufacturer datasheet, it delivers 20 MHz instruction execution (200 ns instruction cycle), 1.75 KB (1K x 14) of OTP program memory, 128 bytes of RAM, and 16 digital I/O pins, all in a compact 20-SSOP surface-mount footprint. The -I/SS suffix indicates the industrial temperature grade (-40C to +85C) and SSOP-20 package, while the "T" denotes tape-and-reel packaging. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory (ROM/OTP/Flash), data RAM, and peripheral interfaces on one silicon die. PIC microcontrollers use a RISC architecture and a Harvard memory layout, which separates program and data buses for predictable instruction timing - making them widely used in embedded control applications such as sensor signal conditioning, motor control, and human-interface products. The PIC16C781 belongs to Microchip's mid-range PIC16 family, which sits between the baseline PIC10/12/16 and the high-performance PIC18/PIC24 in terms of instruction set and peripheral set. The device's defining feature is its analog integration: an 8-channel 8-bit A/D converter, an 8-bit D/A converter, two on-chip op-amps, two comparators, and a Programmable Switched Mode Controller (PSMC) for SMPS support. According to Microchip product documentation, this combination allows engineers to build complete analog signal-chain functions - signal amplification, level detection, reference generation, and closed-loop control - around a single MCU without external analog ICs. The PIC16C781T-I/SS executes instructions at 20 MHz with a 200 ns cycle time, supports in-circuit serial programming (ICSP) via two pins, and offers selectable oscillator modes including internal RC and external crystal. Its 16 I/O pins are 5V-tolerant, with individual direction control and weak pull-up capability. Power-saving features include a SLEEP mode and a watchdog timer with its own on-chip RC oscillator for reliable operation in noisy environments. Typical applications include sensor signal conditioning, switched-mode power supply (SMPS) control via the integrated PSMC, closed-loop PID control using the on-chip op-amps and comparators, automotive sensor interfaces, and industrial instrumentation. The OTP program memory suits low-to-medium volume production where mask-ROM volumes are not justified. When designing with this part, ensure the ICSP pins (RB6/RB7) are accessible on the PCB for in-system programming and debug. Decouple VDD/VSS with a 100 nF ceramic capacitor placed as close to the pins as possible, and reserve the MCLR pin for the standard reset pull-up network. The PSMC peripheral requires careful MOSFET gate-drive layout to avoid injecting switching noise into the analog op-amp inputs. This page synthesizes distributor pricing, drop-in same-family alternatives, comparison data, and practical design notes not found in the manufacturer datasheet alone, providing an engineer-ready reference for selecting the PIC16C781T-I/SS in mixed-signal embedded designs.

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PIC16C782/JW

PIC16C782/JW - 8-Bit MCU, 20MHz, 3.5KB EPROM, A/D, D/A, OPAMP | Microchip

The Microchip PIC16C782/JW is an 8-bit CMOS OTP-based microcontroller in a 20-pin windowed CDIP package, featuring 3.5KB (2K x 14) of UV-erasable EPROM program memory, 128 bytes of RAM, and a 20MHz maximum operating frequency. It integrates six mixed-signal analog peripherals including an 8-bit A/D converter, an 8-bit D/A converter, an operational amplifier, comparators, and a Power Supply Management Controller (PSMC), giving it the highest level of analog integration of any PICmicro device at its introduction. A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory, and programmable I/O peripherals on a single die. An 8-bit MCU such as the PIC16C782 processes data 8 bits at a time, occupying the small-footprint, low-power end of the microcontroller taxonomy (8-bit MCU -> RISC microcontroller -> embedded controller -> semiconductor). The PIC16C782 belongs to the PIC16C family of RISC microcontrollers with only 35 single-word instructions, 200ns instruction execution time at 20MHz, and upward compatibility with the PIC16C5X and PIC12CXXX device families. Key specifications include 13 I/O pins, a 5V typical operating voltage (operating range of approximately 2.5V to 5.5V per PIC16C family norms), internal oscillator support, and a windowed ceramic CDIP package that allows UV erasure for development and prototyping cycles. The integrated operational amplifier eliminates the need for an external analog front-end in many signal-conditioning applications, while the on-chip D/A converter provides analog set-point generation without external components. Architecturally, the PIC16C782 uses Microchip's classic Harvard RISC core with separate program and data buses, a hardware multiplier-free instruction set, and an integrated mixed-signal analog block. The PSMC block enables direct switching converter control loops without additional glue logic, which was a differentiating feature when the part was introduced and remains useful in modern retrofits of legacy designs. Typical applications include power supply supervisory and SMPS control, closed-loop analog signal conditioning, sensor interface and conditioning, programmable analog set-point generation, industrial process controllers, and embedded control with mixed-signal I/O. The integrated op-amp, DAC, and PSMC blocks let a single PIC16C782 replace what previously required an MCU plus several analog ICs. When designing with this device, note that the /JW suffix indicates a UV-erasable windowed package intended for development; for production use the OTP /P or /SO variants are recommended. Programming voltage (typically 13V on MCLR/VPP) and oscillator configuration must follow the datasheet, and the integrated analog peripherals each have dedicated configuration registers. This page synthesizes distributor pricing, exact same-package drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.

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