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PIC16C63A-04/SO - 8-Bit 4MHz OTP MCU, 7KB, 28-SOIC | Microchip
PIC16C63A-04/SO

PIC16C63A-04/SO - 8-Bit 4MHz OTP MCU, 7KB, 28-SOIC | Microchip

The Microchip Technology PIC16C63A-04/SO is an 8-bit CMOS microcontroller based on the PIC16C family RISC architecture, operating at 4 MHz with 200 ns instruction execution time and packaged in a 28-pin SOIC. It integrates 7 KB (4K x 14) of one-time-programmable (OTP) program memory, 192 bytes of RAM, and 22 digital I/O pins, making it a mid-range member of the PIC16C6x family designed for embedded control applications requiring deterministic, low-latency firmware execution. What is an 8-bit OTP microcontroller? An 8-bit microcontroller is a single-chip computer that executes instructions on 8-bit-wide data and is the workhorse of low-cost embedded systems. OTP (One-Time-Programmable) memory can be written exactly once and cannot be erased, which makes these parts well-suited to high-volume production where code changes are infrequent. Within the broader taxonomy, the PIC16C63A belongs to: microcontroller -> 8-bit MCU -> PIC16 family -> PIC16C6x sub-family -> CMOS RISC architecture -> semiconductor IC. This hierarchy governs tool selection, peripheral compatibility, and migration paths. Key features of the PIC16C63A-04/SO include a 35-instruction RISC instruction set where only program branches take two cycles, four 8-bit digital I/O ports (PORTA, PORTB, PORTC, plus shared lines), an enhanced USART with baud-rate generator for serial communications, a capture/compare/PWM (CCP) module, a 10-bit analog-to-digital converter, and two 8-bit timers plus one 16-bit timer. Supply voltage spans 4.0 V to 5.5 V and the device draws low operating current, with a power-saving SLEEP mode that halts the oscillator and peripherals. Architecturally, the PIC16C63A uses a Harvard architecture with separate program and data buses, enabling instruction fetch and operand access in a single cycle. The CMOS process delivers low power consumption and high noise immunity. The 28-SOIC package is a wide-body surface-mount format suitable for hand-solderable prototypes and automated assembly lines. Typical applications include industrial control, automotive body electronics, consumer appliances, security and alarm systems, motor control, and instrumentation front-ends. The integrated USART, CCP and 10-bit ADC reduce external component count in many designs. Design considerations: place a 100 nF decoupling capacitor close to VDD and ensure the MCLR pin is pulled high through a resistor for normal operation. OTP memory programming requires the ICSP interface and a programmer such as the MPLAB PM3. This page synthesizes distributor pricing, drop-in alternatives, and design notes not found in the manufacturer datasheet.

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PIC16C63A-04/SP - 8-Bit 4MHz OTP MCU 7KB Flash 28-SPDIP | Microchip
PIC16C63A-04/SP

PIC16C63A-04/SP - 8-Bit 4MHz OTP MCU 7KB Flash 28-SPDIP | Microchip

The Microchip Technology PIC16C63A-04/SP is an 8-bit CMOS microcontroller in the PIC16CXX mid-range family, featuring 4 MHz maximum clock speed, 7 KB (4K x 14) of One-Time-Programmable (OTP) program memory, and 192 bytes of RAM, packaged in a 28-pin SPDIP through-hole form factor. The -04 speed suffix designates a 4 MHz oscillator variant designed for commercial 4.0V to 5.5V supply operation and 200 ns instruction cycle execution. According to manufacturer documentation, the PIC16C63A/65B/73B/74B family employs an advanced RISC architecture with 35 single-word instructions, of which all but program branches execute in a single instruction cycle. An 8-bit microcontroller (MCU) is a programmable integrated circuit that executes application firmware stored in non-volatile memory and interfaces with the outside world through digital and analog peripherals. Within the semiconductor taxonomy, the PIC16C63A belongs to the hierarchy: microcontroller -> 8-bit MCU -> RISC MCU -> mid-range MCU -> embedded controller. PIC microcontrollers were among the first commercial RISC MCUs and remain popular for cost-optimised applications thanks to OTP and EPROM variants that ship without factory firmware, allowing the end customer to program code once. Key features of the PIC16C63A-04/SP include 22 digital I/O pins, integrated capture/compare/PWM (CCP) peripherals, a USART serial port for asynchronous and synchronous communications, an SSP module supporting SPI and I2C, and two 8-bit timers plus one 16-bit timer. The device draws only a few milliamps in active mode and offers a power-saving Sleep mode that freezes the CPU clock while allowing interrupts to wake the part. The architecture uses a Harvard bus with separate program and data paths, allowing instruction fetch and operand read to occur in the same cycle. The OTP program memory is implemented in EPROM cells that are erased by exposing the die (windowed packages) or one-time-programmed in windowless plastic packages like this SPDIP. The instruction set is fixed at 35 opcodes, each 14 bits wide, which keeps the assembler surface small for hand-coded firmware. Typical applications for the PIC16C63A-04/SP include industrial control boards, motor drive signal conditioning, automotive body electronics, low-end consumer appliances, sensor interfaces with USART or SPI reporting, and educational development platforms where the OTP part allows students to program and discard many devices cheaply. The wide 4.0V to 5.5V supply range also supports legacy 5V logic rails common in factory automation. When designing with this device, ensure your programmer supports OTP parts (the MPLAB PM3 and ICD programmers support the PIC16C63A family) and that the ICSP interface is routed to a header for in-circuit programming. Note that OTP parts can only be programmed once, so for development prefer the PIC16F63 flash equivalent. This page consolidates distributor pricing, drop-in alternatives, and design guidance not present in the manufacturer datasheet.

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PIC16C63A-04E/SP - 8-Bit 4MHz OTP MCU, 7KB Flash, 28-SPDIP
PIC16C63A-04E/SP

PIC16C63A-04E/SP - 8-Bit 4MHz OTP MCU, 7KB Flash, 28-SPDIP

The Microchip Technology PIC16C63A-04E/SP is an 8-bit CMOS microcontroller from the PIC16CXX mid-range family, featuring 7KB of One-Time Programmable (OTP) program memory, 192 bytes of RAM, and a maximum clock speed of 4 MHz, housed in a 28-pin Skinny Plastic DIP (SPDIP) package. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, data RAM, and peripherals on one die; the PIC mid-range core uses a Harvard RISC architecture with 35 single-word instructions, only one of which (program branch) takes two cycles, while the rest execute in a single instruction cycle. This design simplifies coding while delivering deterministic interrupt latency that is critical for real-time embedded control. Key features of the PIC16C63A-04E/SP include 22 digital I/O pins, three serial communication peripherals (I2C, SPI, and UART/USART), Capture/Compare/PWM (CCP) modules for motor and lighting control, an 8-bit ADC, and Brown-out Detect/Reset plus Power-On Reset (POR) for robust supply supervision. The 'E' suffix designates the Extended industrial temperature range of -40C to +125C, while '04' denotes a 4 MHz maximum oscillator frequency. Architecturally, the PIC16C63A uses a 14-bit instruction word with separate code and data buses, allowing simultaneous instruction fetch and data access. Its CMOS static design means the clock can be stopped and the device put into Sleep mode for ultra-low standby power, making it well-suited for battery-backed or energy-conscious industrial applications. Typical applications include industrial control logic, sensor interface boards, motor control subsystems, automotive body electronics (non-safety), and legacy embedded systems requiring long-term parts continuity. The OTP memory and SPDIP package also make this part attractive for through-hole prototyping and low-volume production runs. When designing with the PIC16C63A-04E/SP, ensure the oscillator circuit uses the correct crystal or resonator values for the chosen clock frequency (4 MHz max), and always place decoupling capacitors within 5 mm of the VDD pins. Because this part is OTP, firmware must be fully validated before programming; for in-system reprogrammability, consider the Flash-based PIC16F73/74 equivalents. This page consolidates distributor pricing, same-family and cross-brand drop-in alternatives, pin-level comparison, and engineering design notes that go beyond what the manufacturer datasheet alone provides.

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PIC16C63A-04E/SS - 8-Bit 4MHz CMOS MCU, 7KB OTP, 28-SSOP
PIC16C63A-04E/SS

PIC16C63A-04E/SS - 8-Bit 4MHz CMOS MCU, 7KB OTP, 28-SSOP

The Microchip Technology PIC16C63A-04E/SS is an 8-bit CMOS OTP (One-Time-Programmable) microcontroller from the PIC16CXX mid-range family, operating at a clock speed of 4 MHz and housed in a 28-pin SSOP (Shrink Small Outline Package). It integrates 7KB of program memory, 192 bytes of RAM, and a rich set of peripherals including two 8-bit timers, one 16-bit timer, a USART, MSSP (Master Synchronous Serial Port) supporting both SPI and I2C, and a capture/compare/PWM module. An 8-bit microcontroller (MCU) is a single-chip computer containing a CPU, memory (program + data), and I/O peripherals, designed for embedded control tasks where deterministic, low-cost processing is required. The PIC16CXX family belongs to Microchip's mid-range architecture, which occupies the middle of the PIC performance hierarchy (below PIC18 enhanced, above PIC10/12/16 base-line) and is known for its compact, RISC-style instruction set of 35 single-word instructions, most executing in one instruction cycle. This architecture delivers high code density and predictable interrupt latency, making it a workhorse of industrial, automotive, and consumer embedded designs since the 1990s. Key features include: wide operating voltage range from 2.5V to 6.0V, 22 digital I/O pins with individual direction control, programmable code protection, power-on reset (POR), brown-out detection, power-saving SLEEP mode, and an in-circuit serial programming (ICSP) interface. The PIC16C63A's CMOS/EPROM-based design supports low-power consumption (15 µA typical at 5V/4 MHz, 1 µA typical at 3V/32 kHz) and a fully static operation that allows clock-down to DC. The Extended (E) temperature range of -40°C to +125°C makes this part suitable for harsh-environment and automotive-grade applications. Internally, the device uses a Harvard architecture with separate program and data buses, allowing instruction fetch and operand access in a single cycle. The 14-bit-wide program memory word improves code efficiency compared to traditional 8-bit CISC architectures. The integrated MSSP peripheral supports both SPI (Master/Slave) and I2C (Master/Slave) protocols, eliminating external interface ICs in many designs. The USART provides asynchronous (RS-232/RS-485) and synchronous serial communication, enabling connectivity to sensors, displays, and host processors. Typical applications include industrial control systems, HVAC equipment, automotive body electronics, smart sensors, motor control, and consumer appliance controllers. The 7KB OTP memory is well-suited for cost-sensitive production volumes where firmware is finalized and in-circuit reprogramming is not required in the field. When designing with the PIC16C63A-04E/SS, observe that the OTP variant cannot be re-programmed; for development, use a JW (windowed) package or a Flash-based equivalent such as PIC16F877A. The part requires a stable oscillator source (crystal, resonator, or RC network) and proper decoupling. The 4 MHz maximum clock (denoted by -04 in the part number) targets low-power designs rather than high-speed data processing. This page synthesizes distributor pricing, drop-in alternative cross-references, and practical design notes that complement the official Microchip datasheet for engineers considering the PIC16C63A-04E/SS for new designs or legacy maintenance.

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PIC16C63A-04I/SP - 8-Bit OTP MCU, 4MHz, 7KB | Microchip
PIC16C63A-04I/SP

PIC16C63A-04I/SP - 8-Bit OTP MCU, 4MHz, 7KB | Microchip

The Microchip Technology PIC16C63A-04I/SP is an 8-bit CMOS OTP microcontroller in the PIC16CXX mid-range family, delivering 4 MHz CPU performance with 7 KB (4K x 14) of one-time-programmable program memory and 192 bytes of RAM, housed in a 28-pin SPDIP (SP) package. Operating from 2.0 V to 6.0 V across commercial, industrial, and extended temperature ranges, the device consumes only 15 µA typical at 5 V / 4 MHz and as little as 1 µA at 3 V / 32 kHz, making it well suited to power-constrained embedded designs. According to the Microchip datasheet, the PIC16C63A employs an advanced RISC architecture with only 35 single-word instructions, all single-cycle except program branches which take two cycles. The part offers 22 digital I/O pins, three timers (Timer0, Timer1, Timer2), a capture/compare/PWM module, a USART for asynchronous/synchronous serial communication, a synchronous serial port (SSP) supporting SPI and I²C, and an 8-bit ADC with 5 input channels. The 28-SPDIP (SP) package provides robust through-hole mounting for industrial controls, instrumentation, and legacy equipment designs. Typical applications include motor control, sensor interfacing, low-power remote controls, embedded user interfaces, and industrial automation where the wide voltage range and low quiescent current are valued. For new designs, engineers should weigh the OTP nature of this part carefully: PIC16C63A is one-time-programmable and cannot be firmware-updated, so it is best reserved for mature production designs rather than iterative prototyping. Compared to flash-based PIC16F counterparts, the PIC16C63A offers slightly better ESD robustness and radiation tolerance but loses field re-programmability.

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PIC16C63A-04I/SS - 8-Bit 4MHz 7KB OTP MCU, SSOP-28 | Microchip
PIC16C63A-04I/SS

PIC16C63A-04I/SS - 8-Bit 4MHz 7KB OTP MCU, SSOP-28 | Microchip

The Microchip Technology PIC16C63A-04I/SS is an 8-bit CMOS RISC microcontroller in the PIC16CXX mid-range family, delivering 4 MHz CPU performance with 7 KB (4K x 14) of one-time-programmable (OTP) EPROM program memory in a 28-pin SSOP (5.30 mm body) surface-mount package. The '04' speed suffix designates a 4 MHz oscillator-grade device, and the 'I' industrial-temperature suffix guarantees operation from -40 °C to +85 °C, with a 4.0 V to 5.5 V supply range per the verified PIC16C63A datasheet. An 8-bit microcontroller (MCU) is a single-chip computer that integrates an 8-bit CPU, program memory, data RAM, peripherals, and I/O on one die. Within the broader taxonomy it sits under microcontroller -> embedded processor -> semiconductor device. The PIC16C family uses an advanced RISC architecture that exposes 35 single-word instructions, with all instructions completing in one cycle except program branches (two cycles) - this gives the PIC16C63A deterministic execution timing and excellent code density for embedded control tasks. Program memory is implemented in EPROM (erasable PROM, OTP) while data memory uses static RAM. Key features include 192 bytes of data RAM, 22 digital I/O pins, three 8-bit timer/counters, a USART for asynchronous/synchronous serial communication, an SSP module for SPI/I2C, a 5-channel 8-bit ADC, and a programmable watchdog timer with on-chip RC. The PIC16C63A also integrates power-on reset, brown-out reset, and a wide operating voltage range up to 6.0 V, plus low-power consumption (15 µA typical at 5 V / 4 MHz and 1 µA typical at 3 V / 32 kHz) per the PIC16C63A/65B/73B/74B datasheet. Typical applications include industrial control panels, motor control front-ends, smart sensor interfaces, white-goods and appliance controllers, automotive body electronics subsystems, and embedded serial-communication master/slave nodes. The combination of OTP memory, USART, ADC, and 22 I/O makes it a versatile general-purpose MCU for cost-sensitive designs. When designing with the PIC16C63A-04I/SS, ensure the OTP windowless package is acceptable for production volumes (OTP means one-time-only programming - no field firmware updates). Provide a stable decoupling network (0.1 µF + 10 µF) near VDD/VDD2 pins, and respect MCLR/Vpp timing during in-circuit programming via ICSP. Use the PICmicro mid-range reference manual and MPLAB PM3 programmer for development.

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PIC16C63A-20/SO - 8-Bit 20MHz OTP MCU, 7KB, 28-SOIC | Microchip
PIC16C63A-20/SO

PIC16C63A-20/SO - 8-Bit 20MHz OTP MCU, 7KB, 28-SOIC | Microchip

The Microchip Technology PIC16C63A-20/SO is an 8-bit CMOS RISC microcontroller from the PIC16CXX mid-range family, delivering 20 MHz (200 ns instruction cycle) performance with 7KB (4K x 14) of One-Time-Programmable (OTP) program memory and 192 bytes of RAM in a 28-pin SOIC (SO) wide-body package. The device integrates 22 digital I/O pins, three timer modules, a USART with addressable SPI/I2C, and operates across the commercial 0 °C to +70 °C temperature range on a 2.5 V to 6.0 V supply. An OTP microcontroller (One-Time-Programmable MCU) is a non-volatile programmable logic device whose program memory can be written exactly once after manufacture using a device programmer; once programmed, the code is permanent. PIC microcontrollers sit within the broader category hierarchy: 8-bit microcontroller -> RISC microcontroller -> microcontroller unit (MCU) -> embedded processing -> semiconductor. The PIC16C63A specifically belongs to Microchip's mid-range PIC16 family using a 14-bit instruction word and 35 single-word instructions, balancing code density with deterministic execution for real-time control tasks. Key features include Harvard architecture with separate program and data buses, interrupt handling with hardware context saving, power-saving SLEEP mode, in-circuit serial programming (ICSP) capability, and a wide operating voltage range suitable for both 3.3 V and 5 V systems. The 28-SOIC package (7.50 mm / 0.295 in body width) supports surface-mount assembly in legacy through-hole retrofits and modern SMT production lines. The PIC16C63A uses Microchip's enhanced mid-range core with a two-stage instruction pipeline, two 8-bit and one 16-bit timer, a capture/compare/PWM module, a synchronous serial port configurable as SPI or I2C, and a USART for asynchronous serial communication. Watchdog timer with on-chip RC oscillator provides system recovery without external components. Typical applications include industrial control panels, appliance controllers, automotive body electronics (pre-CAN era), sensor interfaces, and consumer product embedded logic. The combination of OTP, USART, and I/O count makes this device well suited to legacy replacement and brownfield designs where code stability matters more than in-field reprogrammability. When designing with this device, allocate the oscillator startup delay per the configuration bits and validate the Vdd rise-time to ensure proper Power-On Reset behavior. The OTP memory cannot be erased, so development should occur on a windowed (JW) or Flash equivalent variant before committing to PIC16C63A for production. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes that go beyond the manufacturer datasheet, helping engineers source a viable replacement or pin-compatible equivalent for the PIC16C63A-20/SO which Microchip classifies as Not Recommended for new designs.

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PIC16C63A-20/SP - 8-bit 20MHz OTP MCU 7KB | Microchip
PIC16C63A-20/SP

PIC16C63A-20/SP - 8-bit 20MHz OTP MCU 7KB | Microchip

The Microchip Technology PIC16C63A-20/SP is an 8-bit CMOS microcontroller built on the PIC16C family RISC architecture, offering 20 MHz maximum operation, 7 KB (4K x 14) of OTP program memory, and 192 bytes of RAM, all housed in a 28-pin SPDIP package. The device executes instructions in 200 ns cycles using only 35 single-word instructions, supporting 22 digital I/O pins and 5 channels of 8-bit A/D conversion for embedded sensing tasks. An OTP (One-Time Programmable) microcontroller is a non-volatile memory class where the program memory is written once by the user via a device programmer (such as the MPLAB PM3) and cannot be erased or rewritten. OTP sits in the broader taxonomy as a subtype of ROM-based program memory, with siblings EPROM (erasable via UV), EEPROM (electrically byte-erasable), and Flash (electrically block-erasable). Within the PIC16 family hierarchy, the PIC16C63A belongs to the mid-range PIC16 line, which evolved into the PIC16F flash-based successors such as the PIC16F73 and PIC16F73A that share the same 28-pin footprint and peripherals. Key features of the PIC16C63A-20/SP include a 200 ns instruction cycle, three timer modules (Timer0, Timer1, Timer2), two Capture/Compare/PWM (CCP) modules, a Synchronous Serial Port (SSP) configurable for SPI or I2C, an addressable USART for asynchronous serial communication, and a 5-channel 8-bit analog-to-digital converter. The device operates from 4.0 V to 6.0 V supply and is specified over 0 C to +70 C commercial temperature range, with the 20 MHz speed suffix indicating the maximum oscillator frequency. Typical applications for the PIC16C63A-20/SP include industrial control modules, sensor interface boards, low-cost motor control subsystems, and embedded communication bridges that require a deterministic 8-bit controller with hardware USART and SSP. The 22 I/O pins provide ample headroom for keypad, LED, and parallel LCD interfaces, while the integrated ADC removes the need for external analog conversion in measurement nodes. When designing with this part, engineers should note that OTP memory requires device programmers (MPLAB PM3, PICSTART Plus) and cannot be field-upgraded. The 28-SPDIP package is through-hole and supports legacy designs, but for new designs, the Flash-based PIC16F73 or PIC16F73A in the same 28-pin SPDIP is recommended for development flexibility.

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PIC16C63A-20/SS - 8-Bit 20MHz OTP MCU 7KB | Microchip
PIC16C63A-20/SS

PIC16C63A-20/SS - 8-Bit 20MHz OTP MCU 7KB | Microchip

The Microchip Technology PIC16C63A-20/SS is an 8-bit CMOS mid-range microcontroller built on the PIC16CXX RISC architecture, featuring a 20 MHz clock speed, 7 KB (4K x 14) of one-time programmable (OTP) program memory, and 192 bytes of RAM, all packaged in a 28-pin SSOP (SS) form factor. The device delivers 200 ns instruction execution and is engineered for embedded control tasks that demand deterministic response with minimal firmware complexity. It exposes 22 digital I/O lines and supports both parallel and serial peripheral interfaces for flexible system integration. A mid-range PIC microcontroller is a class of 8-bit RISC processor that balances code density, peripheral integration, and cost, sitting between baseline PIC10/12/16 devices and the higher-performance PIC18 family. These MCUs use a 14-bit instruction word and Harvard bus topology, allowing simultaneous instruction fetch and data access. They are widely adopted in industrial, consumer, and automotive subsystems where compact code, predictable timing, and a small PCB footprint are priorities. Key features include a wide operating voltage range from 2.5 V to 6.0 V, industrial and commercial temperature grades, low-power operation with 15 µA typical current at 5 V / 4 MHz and as little as 1 µA at 3 V / 32 kHz, plus 35 single-word instructions of which only program branches take two cycles. The PIC16C63A integrates dual analog comparators, a USART, and a synchronous serial port (SSP) supporting SPI and I2C master/slave modes, enabling direct connectivity to sensors, EEPROMs, displays, and other microcontrollers without external glue logic. The OTP EPROM-based program memory supports prototype and low-volume production runs where in-system reprogrammability is not required. Power-on reset, brown-out detection, watchdog timer, and a programmable code-protection bit harden the device against field faults and unauthorized firmware access. The fully static design simplifies clocking and allows operation across DC to 20 MHz. Typical applications include industrial control panels, motor drive front-ends, sensor conditioning interfaces, low-cost consumer appliances, and instrumentation front-ends. Its OTP memory and small SSOP footprint also suit compact embedded modules. The PIC16C63A-20/SS variants pin-to-pin compatibility with the wider 28-pin PIC16C6X family enables straightforward migration to flash-based PIC16F replacements during lifecycle updates. When designing with this part, ensure the chosen programmer supports OTP devices and that decoupling capacitors are placed within 5 mm of VDD and VSS to suppress switching transients. Note that OTP parts cannot be reprogrammed in-circuit, so engineering samples should be allocated for code bring-up before committing to production volumes.

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PIC16C63A-20E/SO - 8-bit 20MHz OTP MCU, 7KB ROM, SOIC-28 | Microchip
PIC16C63A-20E/SO

PIC16C63A-20E/SO - 8-bit 20MHz OTP MCU, 7KB ROM, SOIC-28 | Microchip

The Microchip PIC16C63A-20E/SO is an 8-bit CMOS microcontroller from the PIC16 family, featuring 7KB of one-time-programmable (OTP) program memory organized as 4K x 14, 192 bytes of RAM, and 22 I/O pins. It operates at 20MHz with a 200ns instruction cycle, packaged in a 28-pin SOIC (SO) wide-body form factor. The "-20" suffix indicates the 20MHz speed grade, while "E" denotes the extended industrial temperature range of -40°C to +125°C. An 8-bit PIC microcontroller is a RISC-based CMOS MCU that uses a Harvard architecture with separate program and data buses. The PIC16C series belongs to the mid-range PIC family, offering 35 single-word instructions, hardware multiply, and interrupt-driven peripherals. PIC microcontrollers sit within the broader category of microcontrollers (MCU) -> embedded controllers -> semiconductors, and dominate cost-sensitive embedded applications due to their deterministic instruction timing, low power consumption, and mature toolchain ecosystem centered on MPLAB X IDE. Key features include 128 bytes of EEPROM data memory, dual capture/compare/PWM (CCP) modules, an asynchronous serial port (USART/SCI), a synchronous serial port (SSP) supporting SPI and I²C, an 8-channel 8-bit ADC, two 8-bit timers (TMR0/TMR2) and one 16-bit timer (TMR1), and a watchdog timer with its own on-chip RC oscillator. The device supports in-circuit serial programming (ICSP) via two pins, enabling field updates without removing the chip from the board. Architecturally, the PIC16C63A uses a 14-bit instruction word with a 2-stage pipeline, allowing most instructions to execute in a single 200ns cycle at 20MHz. Its Harvard bus structure enables simultaneous instruction fetch and data access, improving throughput compared to von Neumann MCUs at the same clock rate. The 8-bit ADC uses successive approximation and shares pins with digital I/O, offering 8 channels of analog input. The CCP modules support PWM output, capture for frequency measurement, and compare for timed event generation. Typical applications include industrial control systems, motor control interfaces, smart sensor hubs, automotive body electronics, appliance control boards, and consumer product embedded controllers. The wide SOIC-28 footprint also makes it suitable for hand-soldered prototypes and breadboard-friendly designs. When designing with this part, note that OTP variants cannot be erased and re-programmed - they are intended for production runs where firmware is final. Use the PIC16F63A flash equivalent during development. The "E" temperature grade supports -40°C to +125°C operation, making the part suitable for outdoor, automotive, and industrial environments. This page synthesizes distributor pricing, drop-in PIC16C63A-20 family alternatives, and practical design notes not found in the manufacturer datasheet alone. The PIC16C63A is marked Not Recommended for New Designs by Microchip, so consult the PIC16F877A or PIC18F equivalents for new product development.

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PIC16C63A-20E/SS - 8-Bit 20MHz 7KB OTP MCU | Microchip
PIC16C63A-20E/SS

PIC16C63A-20E/SS - 8-Bit 20MHz 7KB OTP MCU | Microchip

The Microchip Technology PIC16C63A-20E/SS is an 8-bit CMOS microcontroller from the PIC16CXX mid-range family with 7KB (4K x 14) of one-time-programmable (OTP) program memory and 192 bytes of RAM. It executes instructions at a 20 MHz clock rate, offers 22 digital I/O pins, and operates from a 4.0 V to 5.5 V supply in a 28-pin SSOP (5.30 mm body width) package. Key features include a high-performance RISC CPU with only 35 single-word instructions, single-cycle instruction execution except for program branches (two cycles), and a fully static design supporting low-power operation. The device integrates a 10-bit ADC module, USART, MSSP (SPI/I2C), two 8-bit timers plus one 16-bit timer, and a watchdog timer with on-chip oscillator. Typical low-power figures from the family datasheet are 15 uA typical at 5 V / 4 MHz and 1 uA typical at 3 V / 32 kHz. The PIC16C63A family supports commercial, industrial, and extended temperature ranges, and it is qualified for 100K erase/write-cycle OTP endurance. Typical applications include industrial control, sensor signal conditioning, motor control front-ends, low-power embedded controllers, and communication bridges using USART or MSSP. The wide operating voltage range and 22 I/O pins accommodate mixed designs by connecting digital I/O, a UART, and an SPI or I2C peripheral on the same MCU. When designing with this device, ensure that the program memory is supplied at memory within the 28-SSOP footprint, decoupling capacitors are placed close to VDD/VSS pins, and the MCLR pin has the correct pull-up network. For production programming, use a Microchip programmer such as MPLAB PM3 to write the OTP array once. This page synthesizes distributor pricing, drop-in alternatives from Microchip and Atmel PIC/AVR families, and practical design notes not collected in the manufacturer datasheet.

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PIC16C63A-20I/ML - 8-Bit 20MHz 7KB OTP MCU 28-VQFN | Microchip
PIC16C63A-20I/ML

PIC16C63A-20I/ML - 8-Bit 20MHz 7KB OTP MCU 28-VQFN | Microchip

The Microchip Technology PIC16C63A-20I/ML is an 8-bit CMOS RISC microcontroller from the PIC16CXX mid-range family, delivering 7KB (4K x 14) of one-time-programmable (OTP) program memory, 192x 8 bytes of RAM, and 22 digital I/O pins in a 28-pin VQFN exposed-pad (ML) package operating at up to 20 MHz clock speed. A PIC microcontroller (MCU) is a compact programmable processor that integrates CPU core, non-volatile program memory, working RAM, and peripherals on a single die. PIC16C-series MCUs sit in Microchip's mid-range taxonomy (base PIC -> PIC16C mid-range -> PIC16C6x/7x family -> PIC16C63A), targeting cost-sensitive embedded control with 35 single-word instructions, single-cycle execution except program branches, and DC to 20 MHz operating speed (200 ns instruction cycle). They belong to the broader class of 8-bit microcontrollers and, more generally, embedded microcontrollers within power management and digital control systems. Key features of the PIC16C63A include three timer modules (Timer0 8-bit with 8-bit prescaler, Timer1 16-bit with prescaler that can increment during SLEEP via external crystal/clock, and Timer2 8-bit), an analog comparator module, a synchronous/asynchronous serial port (USART/SCI), and a parallel slave port on selected variants. The device operates over the industrial temperature range (-40C to +85C) denoted by the 'I' suffix, supports an external oscillator source, and includes power-managed SLEEP mode for low-power designs. The architecture uses Harvard-style separate program/data buses, a 14-bit wide instruction word, and an 8-bit data path, allowing deterministic single-cycle instruction execution. This RISC design delivers high throughput per MHz while keeping the instruction set compact enough for assembly or C programming under MPLAB IDE and MPLAB XC8. Code compatibility within the 28-pin PIC16CXX pin family enables drop-in migration across the PIC16C62/65/73/74 sub-families. Typical applications for the PIC16C63A-20I/ML include industrial control interfaces, sensor signal conditioning front-ends, low-to-medium-speed serial communication bridges (USART), keypad and LED scanning, and general-purpose embedded controllers where OTP programmability and proven PIC16C toolchain support outweigh flash reprogramming convenience. The 28-VQFN exposed-pad package suits space-constrained boards requiring modest thermal dissipation. When designing with the PIC16C63A, remember that OTP memory cannot be re-programmed in-circuit, so use a JW (windowed) variant or PIC16F-series equivalent during development and qualification. Ensure the exposed pad is soldered to a sufficient copper area for the package's heat-sinking objective. This page synthesizes distributor availability, drop-in pin-compatible alternatives from the 28-pin PIC16CXX family, and practical design notes not aggregated in a single source by the manufacturer datasheet.

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PIC16C63A-20I/SO - 8-Bit 20MHz OTP MCU 7KB | Microchip
PIC16C63A-20I/SO

PIC16C63A-20I/SO - 8-Bit 20MHz OTP MCU 7KB | Microchip

The Microchip Technology PIC16C63A-20I/SO is an 8-bit CMOS OTP (One-Time-Programmable) microcontroller from the PIC® 16C family, integrating 7KB of program memory (4K x 14 words), 192 bytes of RAM, and 22 digital I/O lines in a 28-pin SOIC package. It operates from 4.0V to 5.5V with a maximum clock rate of 20 MHz, delivering 200 ns instruction execution through the PIC RISC architecture and a fixed 35-instruction set. The industrial temperature grade spans -40°C to +85°C. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory, volatile data memory, and configurable peripheral I/O on one die. PIC microcontrollers sit in the 8-bit RISC MCU category within the broader hierarchy of microcontroller -> embedded processor -> semiconductor device. The PIC16C6x family specifically targets cost-sensitive, deterministic embedded control applications, blending Harvard architecture, OTP program memory, and low-power CMOS design with extensive peripheral integration. Key features include five 8-bit I/O ports (PORTA-PORTE), a USART for serial communication, an MSSP module supporting SPI and I²C, two 8-bit timers plus one 16-bit timer with capture/compare/PWM, a 10-bit multi-channel analog-to-digital converter, and an 8-bit parallel slave port. The wide operating voltage (to 6.0V) and three temperature grades (commercial, industrial, extended) support deployment across consumer, industrial, and automotive under-hood environments. Internally, the PIC16C63A uses a 14-bit instruction word with a single-cycle fetch (200 ns at 20 MHz) and a two-cycle pipeline for program branches. An 8-level deep hardware stack, watchdog timer with its own on-chip RC oscillator, and brown-out reset circuitry add fault resilience. Power-saving SLEEP mode draws microamp-level current while retaining RAM, enabling battery-backed applications. Typical applications include appliance control, automotive subsystems, industrial sensors and actuators, remote keyless entry, and smart-card readers. Pin-compatibility across the PIC16C63/63A/65B/73B/74B family lets designers scale code size and peripheral mix without PCB rework. When designing with this OTP MCU, plan code and programming flow early; OTP parts cannot be re-flashed and require windowed ceramic variants (e.g., JW package) for prototype iteration. Verify supply chain continuity, as PIC16C OTP devices are mature parts with Microchip's "Not Recommended for new designs" (NRND) status - existing designs are supported, but new product introductions should evaluate the flash-based PIC16F7x successor family.

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PIC16C63A-20I/SP - 8-Bit 20MHz OTP MCU 7KB Flash | Microchip
PIC16C63A-20I/SP

PIC16C63A-20I/SP - 8-Bit 20MHz OTP MCU 7KB Flash | Microchip

The Microchip Technology PIC16C63A-20I/SP is an 8-bit CMOS microcontroller built on EPROM/OTP technology, operating at up to 20 MHz with 7 KB (4K x 14) of program memory and 192 bytes of RAM, housed in a 28-pin SPDIP (SP) through-hole package. It delivers 22 digital I/O pins, a 20 MHz clock speed, and operates from 2.5 V to 6.0 V supply, targeting cost-sensitive embedded control applications that require one-time-programmable code storage. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (ROM/Flash/OTP), data memory (RAM), and programmable I/O peripherals onto one die. PIC microcontrollers use a RISC Harvard architecture with 35 single-word instructions and a 200 ns instruction execution time, executing most instructions in one instruction cycle except for program branches which take two. This instruction set and architecture make PIC MCUs well-suited for deterministic real-time control in industrial, consumer, and automotive subsystems. Key features of the PIC16C63A include 7 KB OTP program memory, 192 bytes of RAM, 22 I/O pins, three timers (Timer0, Timer1, Timer2), a USART module for serial communication, and a Capture/Compare/PWM (CCP) module. The -20I industrial temperature range covers -40°C to +85°C, and the device includes power-on reset, brown-out detection, watchdog timer with on-chip RC oscillator, and an in-circuit serial programming (ICSP) interface. Low-power consumption is rated at 15 µA typical at 5 V / 4 MHz and 1 µA typical at 3 V / 32 kHz, supporting battery-backed applications. The PIC16C63A uses CMOS EPROM cell technology for non-volatile program storage, requiring a quartz-windowed package variant (e.g., PIC16C63A/JW) for UV erasure and re-programming during prototyping. The /SP SPDIP-28 footprint is pin-compatible with PIC16C62B, PIC16C63, and PIC16C73A in the same family, simplifying PCB reuse across legacy PIC designs. Designers should note that OTP parts cannot be reprogrammed; pre-programmed parts are typically ordered for production while windowed samples are used for code development. Typical applications include industrial control loops, sensor interface boards, low-speed serial communication bridges (RS-232/RS-485), motor control signal conditioning, and legacy embedded designs that originated on the PIC16C family. Designers migrating from PIC16C63A to a flash-based alternative (PIC16F73 or PIC16F873A) gain in-system reprogrammability at the cost of OTP write-once security. When designing with this part, ensure decoupling capacitors (0.1 µF ceramic) are placed within 5 mm of VDD/VDD2 and VSS pins, and that MCLR is properly pulled up to VDD through a 10 kΩ resistor to avoid spurious resets. The ICSP interface uses RB6 (clock) and RB7 (data); reserve these pins for programming access or use them only when ICSP is not required. This page synthesizes distributor pricing, drop-in PIC16C family alternatives, and practical design notes not found in the standalone manufacturer datasheet.

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PIC16C63A-20I/SS - 8-Bit 7KB MCU 20MHz OTP 28-SSOP | Microchip
PIC16C63A-20I/SS

PIC16C63A-20I/SS - 8-Bit 7KB MCU 20MHz OTP 28-SSOP | Microchip

The Microchip PIC16C63A-20I/SS is an 8-bit CMOS one-time-programmable (OTP) microcontroller from the PIC16CXX mid-range family, delivering 20 MHz clock input and 7 KB (4K x 14 words) of program memory in a 28-pin SSOP package. The device is built on Microchip's RISC architecture with 35 single-word instructions, providing 200 ns instruction cycle execution and DC to 20 MHz operating speed. Industrial temperature grade (-40C to +85C), 22 I/O pins, 192 bytes of data RAM, and 4.0 V to 5.5 V supply voltage complete the headline specifications. An 8-bit OTP microcontroller is a single-chip computer built around an 8-bit data path and non-volatile one-time-programmable program memory; the OTP memory window is pre-programmed during manufacture and cannot be erased by UV or electrically, which suits low-volume, cost-sensitive, or field-deployed applications where firmware is finalized before deployment. The PIC16C63A sits within the broader hierarchy: 8-bit microcontroller -> microcontroller unit (MCU) -> embedded controller -> semiconductor. Its mid-range RISC core reduces code size and execution time relative to legacy CISC architectures while keeping the instruction set small enough for hand-assembled firmware. Key features include a Harvard architecture with separate program and data buses, eight hardware interrupt sources, two 8-bit timer/counters plus one 16-bit timer/counter, a 10-bit multi-channel analog-to-digital converter (ADC) with up to 5 input channels, USART/SCI communications, and I2C/SPI peripherals for synchronous serial. On-chip watchdog timer, brown-out reset, power-on reset, and a 5-bit PORTA digital I/O port provide robust embedded control without auxiliary components. The 28-SSOP industrial package offers a compact 5.30 mm body width, gulled-wing surface-mount terminations, and the standard SSOP pinout used across the PIC16C6x family for layout reuse. Typical applications include industrial control and sensor conditioning, motor drive signal conditioning, appliance controllers, automotive body electronics sub-modules, smart sensor interfaces, and embedded communications bridges that require a simple, deterministic 8-bit controller rather than a 32-bit application processor. The OTP memory suits high-volume consumer and industrial systems where firmware is locked at production and field reprogramming is not required; flash-based PIC16F equivalents are available when in-application reprogrammability is needed. Design consideration: at 20 MHz the instruction cycle is 200 ns; branches take two cycles. Provide a clean 5 V rail with decoupling capacitors near VDD/VSS pins and verify the oscillator start-up time at cold temperature to ensure reliable reset. Industrial temperature grade parts rated -40C to +85C suit most indoor and sheltered outdoor deployments. This page synthesizes distributor pricing, drop-in alternatives within the PIC16C family, and practical design notes that go beyond the standard Microchip datasheet contents.

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PIC16C63A/JW - 8-Bit 20MHz 7KB EPROM MCU, 28-CDIP | Microchip
PIC16C63A/JW

PIC16C63A/JW - 8-Bit 20MHz 7KB EPROM MCU, 28-CDIP | Microchip

The Microchip Technology PIC16C63A/JW is an 8-bit CMOS microcontroller from the PIC16CXX mid-range family, featuring a 20 MHz maximum clock speed and 7 KB (4K x 14) of UV-erasable EPROM program memory, housed in a 28-pin windowed ceramic DIP (CDIP-28) package. The /JW suffix specifically identifies the windowed, UV-erasable ceramic DIP variant used for development and prototyping, as opposed to the OTP plastic variants. A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory, working RAM, and programmable I/O peripherals. The PIC16CXX family employs a RISC (Reduced Instruction Set Computer) architecture that uses only 35 single-word instructions, making assembly programming unusually simple for an 8-bit core. Within the broader taxonomy, PIC16C63A is a mid-range PIC microcontroller, itself a sub-family of the PIC microcontrollers (8-bit), which sit within the larger class of embedded microcontrollers and ultimately the semiconductor power management and embedded processing hierarchies used across nearly every electronic product category. Key differentiating features include fully-static operation (clock can be stopped to save energy), 192 bytes of data RAM, 22 digital I/O lines, a hardware USART for asynchronous serial links, an MSSP module (SPI / I2C), and a 20 MHz clock input that delivers 200 ns instruction execution. The PIC16C63A runs from a 2.5 V to 6.0 V supply and consumes only about 15 uA typical at 5 V, 4 MHz and 1 uA typical at 3 V, 32 kHz, making it well suited to low-power embedded designs. Typical applications include industrial control systems, instrumentation front panels, sensor interfaces, motor-control co-processors, low-cost consumer appliances, and educational/development platforms where UV-erasable windowed parts remain preferred for iterative code changes. The /JW windowed ceramic package also makes the part useful for low-volume prototype runs and code-development workbenches where the chip must be erased and reprogrammed many times. A key design consideration is that the /JW package is through-hole ceramic and targets bench use rather than high-volume SMT manufacturing. For production designs, design engineers should plan to migrate code to the OTP (-04/-10/-20 speed grades in plastic SO, SP, or SS packages) once firmware is frozen. Because the PIC16C63A is from the C-series EPROM family, RoHS compliance varies by specific package and is generally not lead-free on the /JW package. This page synthesizes distributor availability and pricing, drop-in compatible PIC16CXX mid-range alternatives in the same windowed CDIP-28 footprint, and practical engineering notes - a combination of information not available on the manufacturer datasheet alone.

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PIC16C63AT-04/SO - 8-bit PIC MCU 7KB EPROM 22 I/O 4MHz SOIC-28 | Microchip
PIC16C63AT-04/SO

PIC16C63AT-04/SO - 8-bit PIC MCU 7KB EPROM 22 I/O 4MHz SOIC-28 | Microchip

The Microchip Technology PIC16C63AT-04/SO is an 8-bit CMOS RISC microcontroller from the PIC16CXX mid-range family, featuring 7KB of One-Time Programmable (OTP) EPROM program memory and 192 bytes of data RAM, packaged in a 28-pin SOIC (SO) wide-body surface-mount format with tape-and-reel packaging. Operating at 4 MHz from a 5V supply, this commercial-temperature-grade device delivers 22 digital I/O pins, an advanced RISC instruction set, and the classic PIC16C6x peripheral mix including a USART, MSSP (SPI/I2C), and 8-channel 8-bit ADC, making it well suited for embedded control applications. An 8-bit PIC microcontroller is a Harvard-architecture, RISC-based single-chip computer built around a small instruction set (typically 35 instructions) executed in single clock cycles (with branches taking two). PIC MCUs sit at the foundation of the embedded systems hierarchy, bridging discrete logic and 32-bit processors: they belong to the microcontroller class, fall under microcontrollers -> microcomputers -> embedded processors, and are widely deployed where deterministic real-time control, low cost, and easy development outweigh the need for large memory or high clock rates. The 'C' suffix denotes OTP EPROM program memory (vs. Flash 'F' or ROM mask 'CR'), and the 'A' denotes the silicon revision (improved errata sheet versus original PIC16C63). Key specifications include 7KB (4K x 14) program memory, 192 bytes of RAM, 22 I/O pins, three timers (Timer0, Timer1, Timer2), a 10-bit multi-channel A/D converter, a USART, and an MSSP peripheral. The OTP EPROM memory requires a windowless or UV-erasable package for code updates, which restricts this part to high-volume production where code is finalized. The -04 speed suffix indicates a 4 MHz maximum oscillator frequency, while the -20 variants run up to 20 MHz; the 'T' suffix indicates tape-and-reel packaging and 'SO' indicates the SOIC-28 wide-body package. Operating voltage is specified at 4.0V to 6.0V for the standard PIC16C6x OTP family. Typical applications include industrial control, instrumentation, motor control front-ends, automotive body electronics (in non-safety-critical subsystems), and white goods. Its mid-range peripheral set (ADC + USART + MSSP) makes it a strong fit for sensor interface nodes and serial-communication bridges where deterministic response time is more important than raw throughput. When designing with the PIC16C63AT-04/SO, ensure the device is supplied from a regulated 5V rail within the 4.0V-6.0V window, place a 100 nF decoupling capacitor within 5 mm of VDD, and configure MCLR with the standard 10 kohm pull-up to VDD. Because OTP EPROM cannot be re-programmed in-circuit, use a development-friendly equivalent such as the PIC16F873 or PIC16C63A-04/SO emulator for code bring-up before committing to OTP for production. This page synthesizes distributor pricing and stock status from DigiKey and Mouser, pin-compatible drop-in alternatives from the PIC16C6x family, and practical design notes not found in the bare datasheet.

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PIC16C63AT-04E/SO - 8-Bit 4MHz 7KB OTP MCU, 28-SOIC | Microchip
PIC16C63AT-04E/SO

PIC16C63AT-04E/SO - 8-Bit 4MHz 7KB OTP MCU, 28-SOIC | Microchip

The Microchip Technology PIC16C63AT-04E/SO is an 8-bit PIC microcontroller from the PIC16CXX mid-range family, operating at 4 MHz and housed in a 28-pin SOIC (SO) wide-body surface-mount package. It integrates 7 KB of one-time-programmable (OTP) program memory (4K x 14 words), 192 bytes of RAM, and 22 digital I/O pins. The device is rated for the extended automotive temperature range (-40C to +125C) and operates from 2.5V to 5.5V. A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory, data RAM, and peripheral interfaces. The PIC16C family is built on Microchip's RISC-based 8-bit Harvard architecture, where program and data buses are physically separated to allow simultaneous fetch and read, enabling single-cycle instruction execution under steady-state pipeline operation. The PIC16C63A/65B/73B/74B sub-family is the mid-range tier that added enhanced peripherals such as the USART, MSSP (SPI/I2C), and capture/compare/PWM modules beyond the baseline PIC16C5X family. Key features of the PIC16C63AT-04E/SO include 4 MHz maximum operating frequency, 7 KB (4K x 14) OTP EPROM program memory, 192 bytes of RAM, two 8-bit timers plus one 16-bit timer/counter, a 10-bit multi-channel ADC, an enhanced USART for serial communications, a Master SSP supporting SPI and I2C, and a programmable brown-out reset. The 'A' suffix denotes the silicon revision; 'T' denotes tape-and-reel packaging; '04' denotes the 4 MHz speed grade; 'E' denotes the extended automotive temperature grade; and 'SO' denotes the 28-pin wide-body small-outline IC package. Typical applications for this MCU include industrial control subsystems, automotive body electronics, sensor interface modules, and legacy embedded designs where OTP memory is acceptable and the long-life-cycle automotive-grade qualification is required. Because the program memory is OTP, firmware is committed during production programming and cannot be re-programmed in-circuit, which suits high-volume fixed-function controllers. When designing with this part, ensure the in-circuit emulator (ICE) or production programmer is compatible with the PIC16C63A family and that the brown-out reset voltage threshold is configured above the minimum Vdd. The 28-SOIC wide-body package has a thermal resistance typically around 50-70 C/W (junction-to-ambient), so no heatsink is required at the modest 5V/4 MHz operating point. The MCU is well-suited for drop-in upgrades within the same PIC16C63A family when speed grade, temperature grade, and package are matched.

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PIC16C63AT-04E/SS - 8-bit 4MHz PIC MCU 7KB OTP 28-SSOP | Microchip
PIC16C63AT-04E/SS

PIC16C63AT-04E/SS - 8-bit 4MHz PIC MCU 7KB OTP 28-SSOP | Microchip

The Microchip Technology PIC16C63AT-04E/SS is a member of the PIC16CXX mid-range 8-bit microcontroller family, featuring 7KB (4K x 14) of One-Time Programmable (OTP) program memory, 192 bytes of RAM, and 22 programmable digital I/O pins, packaged in a 28-pin Shrink Small Outline Package (SSOP). The device is specified for an extended operating temperature range and operates from a 4V to 5.5V supply, with a 4MHz maximum clock rate at this speed grade. It belongs to the PIC16C63A/65B/73B/74B sub-family, sharing peripheral and pinout compatibility across the group. A mid-range 8-bit PIC microcontroller is a fully-static CMOS processor built around a Harvard architecture that separates program and data memory paths. The PIC16CXX family executes most instructions in a single cycle (four oscillator periods), with only program branches taking two cycles, and offers approximately 35 single-word instructions to learn. These MCUs integrate Brown-out Detect/Reset, Power-on Reset, a Watchdog Timer, PWM peripherals, and serial communication controllers, forming a complete embedded control subsystem on a single die. Key specifications include: 8-bit PIC core architecture, 7KB OTP program memory organized as 4K x 14 words, 192 x 8 bytes of RAM, 22 digital I/O pins, and three serial communication peripherals (I2C, SPI, and UART/USART). The Brown-out Detect block protects against unexpected code execution when VDD droops below the safe threshold, while the integrated PWM module simplifies motor, lighting, or analog control tasks. The 28-SSOP package offers a compact footprint suitable for space-constrained PCB layouts. Architecturally, the device uses Microchip's classic mid-range CPU core with a 14-bit instruction word and 8-bit data path. The OTP program memory is programmed once and cannot be electrically erased, which makes this part most suitable for high-volume production runs where firmware is finalized and cost-per-unit dominates over in-field reprogrammability. Compared to flash-based PIC16F equivalents, OTP devices typically offer lower unit cost but lack field-update capability. Typical applications include industrial control modules, white-goods and appliance motor control, HVAC fan and damper drivers, simple sensor interfacing nodes, automotive body electronics sub-modules, and legacy embedded systems that require continued OTP-based production. The combination of UART, SPI, and I2C allows connection to sensors, displays, and other MCUs in mixed-protocol networks. Designers commonly pair this part with external EEPROM for parameter storage, RS-232/RS-485 transceivers, and low-side MOSFET drivers. When designing with this device, confirm that OTP programming flow is acceptable for your product lifecycle. Plan production programming with a Microchip-supported device programmer, allow sufficient margin for the extended temperature grade in worst-case thermal environments, and verify that the SSOP land pattern matches your PCB footprint. Consider PIC16F-series flash alternatives if in-field firmware updates are required. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, giving procurement and engineering teams a single source for parametric data, supply-chain risk analysis, and selection guidance.

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PIC16C63AT-04I/SO - 8-Bit OTP MCU 7KB 4MHz SOIC-28 | Microchip
PIC16C63AT-04I/SO

PIC16C63AT-04I/SO - 8-Bit OTP MCU 7KB 4MHz SOIC-28 | Microchip

The Microchip Technology PIC16C63AT-04I/SO is an 8-bit CMOS one-time-programmable (OTP) microcontroller in the PIC16CXX mid-range family, delivering 4 MIPS performance at 4 MHz operating frequency in a 28-pin SOIC (SO) package. It integrates 7 KB of OTP program memory (4K x 14 words), 192 bytes of RAM, 22 digital I/O pins, and a peripheral set that includes a USART, SSP, and Capture/Compare/PWM modules, all backed by Microchip's RISC Harvard architecture with only 35 single-word instructions to learn. An 8-bit microcontroller (MCU) is a single-chip computer containing a CPU, program memory, data RAM, I/O peripherals, and timers on one silicon die. The PIC16CXX mid-range family is the workhorse tier of Microchip's PIC architecture - it occupies the middle of the company's product pyramid: `PIC16CXX mid-range > PIC 8-bit > PICmicro > PIC16C > PIC family > microcontroller > embedded processor > semiconductor`. Mid-range parts strike a balance between code density, peripheral richness, and cost, which is why they have been embedded into billions of industrial, automotive, and consumer designs over three decades. Key differentiating features include the OTP program memory for low per-unit cost in mature production runs, a wide 4 V to 5.5 V supply range, and a 10 MHz maximum clock speed option available on the 10/20 MHz siblings. The PIC16C63AT-04I/SO variant adds the -04 speed grade (4 MHz) and the -I industrial temperature range (-40C to +85C) over the standard commercial part, all within the same 28-pin SOIC footprint. The device also supports in-circuit serial programming (ICSP) via the RB6/RB7 pins, allowing firmware updates after PCB assembly. Typical applications include industrial control, sensor signal conditioning, low-cost consumer appliances, automotive body controllers (pre-CAN era), and standalone serial peripherals. The OTP memory makes it especially well suited to high-volume mature products where firmware is locked and per-unit cost dominates BOM. When designing with this part, plan around the OTP constraint: once programmed the memory cannot be erased. Engineers should prototype with the pin-compatible PIC16F63 (Flash) variant and migrate to PIC16C63A for production. Always reserve the ICSP pins for in-system programming access. This page consolidates distributor pricing, drop-in alternatives (siblings and Flash-based equivalents), and practical design notes that are not aggregated on any single manufacturer or distributor page.

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PIC16C63AT-04I/SS - 8-bit MCU, 7KB OTP, 4MHz, 28-SSOP | Microchip
PIC16C63AT-04I/SS

PIC16C63AT-04I/SS - 8-bit MCU, 7KB OTP, 4MHz, 28-SSOP | Microchip

The Microchip Technology PIC16C63AT-04I/SS is an 8-bit CMOS microcontroller from the PIC16CXX mid-range family, featuring 7KB (4K x 14) of One-Time Programmable (OTP) program memory, 192 bytes of RAM, and 22 I/O pins, housed in a 28-pin SSOP package. The "T" suffix indicates tape-and-reel packaging, while "04" denotes a 4MHz maximum operating frequency and "I" designates the industrial temperature range. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, working RAM, and peripheral interfaces onto one silicon die. The PIC16CXX mid-range family is built on a fully-static CMOS architecture and belongs to the broader 8-bit microcontroller category, which sits within embedded computing, microcontrollers, and finally integrated circuits. These devices are engineered for deterministic real-time control where predictable instruction timing, low cost, and ease of development outweigh raw computational throughput. Key features of the PIC16C63AT-04I/SS include its 4MHz maximum clock, 192 x 8 bytes of data RAM, 22 digital I/O pins, and integrated peripherals such as a USART for serial communication, a Capture/Compare/PWM module, an 8-bit timer/counter, and a watchdog timer for reliable operation in noise-prone industrial environments. The OTP program memory allows one-time field programming, making the device well-suited for mature production designs where firmware is finalized. Technically, the PIC16C63A employs a RISC-style Harvard architecture with separate program and data buses, providing predictable instruction execution in a single instruction cycle (four clock periods). This makes interrupt response and timing calculations straightforward for embedded developers writing in assembly or C. The 4MHz clock yields a 1-microsecond instruction cycle, sufficient for many sensing, motor, and human-machine-interface tasks. Typical applications include industrial control subsystems, appliance control boards, sensor signal conditioners, simple sensor hubs, and embedded user-interface modules where cost-sensitive, deterministic 8-bit control is required. The 28-SSOP footprint also makes it attractive for space-constrained PCB designs. When designing with this device, ensure the 5V supply is well-decoupled with a 100nF ceramic capacitor close to VDD, and configure the MCLR pin with the recommended 10kohm pull-up for clean device reset behavior. This page synthesizes current distributor inventory, parametric drop-in alternatives, and engineering design notes not found in the standalone manufacturer datasheet.

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PIC16C63AT-20/SO - 8-bit OTP MCU, 7KB, 20MHz, 28-SOIC | Microchip
PIC16C63AT-20/SO

PIC16C63AT-20/SO - 8-bit OTP MCU, 7KB, 20MHz, 28-SOIC | Microchip

The Microchip Technology PIC16C63AT-20/SO is an 8-bit CMOS RISC microcontroller in the PIC16CXX mid-range family, featuring 7KB (4K x 14) of One-Time Programmable (OTP) program memory, 192 bytes of SRAM, and 22 digital I/O pins, housed in a 28-pin SOIC package with 20MHz maximum operating frequency at 5V. An 8-bit microcontroller (MCU) is a single-chip computer integrating an 8-bit CPU core, program memory (ROM/Flash/OTP), data RAM, I/O peripherals, and timers onto one silicon die. The PIC16C63A belongs to Microchip's PIC16C mid-range architecture, sitting within the broader hierarchy of PIC microcontrollers -> 8-bit MCU -> microcontroller -> embedded controller -> semiconductor. Its Harvard RISC architecture with only 35 single-word instructions enables predictable 200ns instruction execution at 20MHz, simplifying both assembly and C code development. Key features include 22 I/O pins supporting digital I/O, three 8-bit timers (Timer0, Timer1, Timer2) and two Capture/Compare/PWM (CCP) modules, a USART for asynchronous/synchronous serial communication, an MSSP module supporting SPI and I2C, and a 10-bit multi-channel analog-to-digital converter for mixed-signal applications. The device integrates brown-out detect and a watchdog timer for enhanced reliability in commercial-grade operating environments. The PIC16C63A uses a 14-bit instruction word optimized for compiled code density, and the OTP memory supports field programming during prototyping. Internal oscillator options and the wide 2.5V to 5.5V supply range (specific to the 'A' silicon revision) allow flexible power tree design. The architecture's deterministic interrupt response and single-cycle multiplication make it well suited to real-time control loops. Typical applications include industrial automation control boards, HVAC thermostat controllers, automotive body electronics (under-hood modules require the 'I' grade), consumer appliance control, and small sensor interface boards. The integrated USART and MSSP peripherals support bridging to RS-232/RS-485 networks and sensor buses. When designing with the PIC16C63AT-20/SO, note the commercial temperature grade (0C to +70C); for extended industrial or automotive deployments, choose the PIC16C63AT-20I/SO variant. Decoupling requires a 100nF ceramic capacitor adjacent to VDD with bulk capacitance sized per load. The 'T' suffix indicates tape-and-reel packaging for high-volume assembly lines.

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PIC16C63AT-20/SS - 8-Bit 20MHz OTP MCU 7KB | Microchip
PIC16C63AT-20/SS

PIC16C63AT-20/SS - 8-Bit 20MHz OTP MCU 7KB | Microchip

The Microchip Technology PIC16C63AT-20/SS is an 8-bit RISC microcontroller from the PIC® 16C family, featuring a 20 MHz maximum CPU clock, 7 KB of One-Time Programmable (OTP) program memory (organized as 4K × 14 words) and 192 bytes of RAM. The device comes in a 28-pin SSOP (shrink small outline) surface-mount package with 22 programmable I/O lines, supporting commercial-grade operation. It integrates peripherals typical of mid-range PIC16 devices including multiple timers, a USART, MSSP for SPI/I2C, and a 5-channel 8-bit ADC. An 8-bit microcontroller (MCU) is a self-contained computing element that integrates a CPU, non-volatile program memory (here OTP), volatile data RAM, I/O peripherals and interrupt logic onto a single silicon die. The 8-bit PIC16C family sits in the hierarchy: microcontroller -> 8-bit MCU -> RISC MCU -> PIC16 mid-range -> PIC16C63A subgroup, and is widely used in cost-sensitive embedded control tasks where deterministic instruction execution and low external component count are priorities. Key features of the PIC16C63AT-20/SS include a Harvard-architecture RISC core that executes most instructions in a single 200 ns cycle (at 20 MHz), 22 digital I/O pins with individually programmable direction registers, a Universal Synchronous/Asynchronous Receiver-Transmitter (USART), a Master Synchronous Serial Port (MSSP) supporting both SPI and I²C, two 8-bit timers and one 16-bit timer/counter, a watchdog timer with on-chip RC oscillator, an analog comparator, and brown-out reset. The OTP program memory allows customization of firmware once per part, with a typical program retention rating designed for the lifetime of the end product. Typical applications include industrial control modules, sensor interfaces, low-speed serial communication bridges (RS-232/RS-485 via USART), motor control and lighting drivers, smart-card readers, consumer appliances, and replacement of discrete logic in legacy embedded designs. The 22 I/O count is sufficient for keypad scanning, LCD drive, and parallel sensor busses. Designers should note that OTP memory can be programmed only once, so development should be performed on a windowed (JW) or flash-based PIC16F equivalent before committing to the PIC16C63AT-20/SS for production. The SSOP-28 footprint is 0.65 mm pitch and is widely supported by hand-soldering and pick-and-place processes. The internal 4 MHz RC oscillator plus an external crystal option provide flexibility for system clocking; selecting the correct configuration fuses at programming time is essential to bring up the application correctly.

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PIC16C63AT-20E/SS - 8-Bit 20MHz OTP MCU, 7KB | Microchip
PIC16C63AT-20E/SS

PIC16C63AT-20E/SS - 8-Bit 20MHz OTP MCU, 7KB | Microchip

The Microchip Technology PIC16C63AT-20E/SS is an 8-bit CMOS microcontroller belonging to the PIC16CXX mid-range family, delivering up to 20 MHz of operation with 7KB of one-time programmable (OTP) program memory and 192 bytes of RAM in a 28-pin SSOP surface-mount package. The 'T' suffix indicates tape-and-reel packaging, '20' denotes the 20 MHz maximum clock speed, 'E' marks the extended industrial temperature grade of -40C to +125C, and '/SS' specifies the 28-SSOP (5.30 mm body width) outline. It exposes 22 I/O pins and integrates peripherals such as a USART, MSSP (SPI/I2C), capture/compare/PWM, and an 8-channel 8-bit ADC. An 8-bit OTP microcontroller (one-time programmable microcontroller) is a class of embedded controller that stores its program in non-volatile memory programmed once at production, retaining code without external storage and offering lower per-unit cost than flash-based equivalents for high-volume mature products. Within the broader taxonomy, the PIC16C63A sits at: PIC16C63A -> PIC16C6xx mid-range family -> PIC16 family -> 8-bit PIC microcontroller -> embedded microcontroller -> integrated circuit -> semiconductor. OTP parts sit alongside EPROM-windowed and flash variants in Microchip's classic PIC16C lineup. Key differentiating features of the PIC16C63AT-20E/SS include its 20 MHz MIPS performance at 5V operation, integrated synchronous serial port (MSSP) supporting both SPI and I2C master/slave modes, an enhanced USART with autobaud detection, and the PIC mid-range 14-bit instruction set that delivers single-cycle execution except for branch instructions. The 28-SSOP package provides a compact 5.30 mm body width suitable for space-constrained industrial controller boards. The PIC16C63A is built on a fully-static CMOS process, allowing the clock to be stopped without losing register state - a useful feature for low-power sleep/awake control loops. The OTP program memory and the absence of internal flash make this part best suited to high-volume production where firmware is final and one-time programming cost is acceptable, with field updates typically handled via board-level replacement or external bootloader memory. Typical applications include industrial automation controllers, automotive body and chassis ECUs, consumer appliance control boards, and sensor interface modules where the PIC16 mid-range instruction set and 5V-tolerant I/O are required. The wide 4V-5.5V supply tolerance supports unregulated 5V rails common in industrial installations. When designing with this part, ensure the OTP programming step is performed before final assembly or via on-board programming through the ICSP interface; field firmware updates are not possible on this device. Decoupling VDD/VSS with 100 nF ceramic capacitors placed within 5 mm of the pins is required for EMI suppression on the analog and digital rails. This page synthesizes distributor inventory (DigiKey, Mouser, Heisener), parametric pin-compatible drop-in alternatives, and practical design notes not consolidated in the manufacturer datasheet, helping engineers evaluate the PIC16C63AT-20E/SS against the broader PIC16C6xx family and OTP-vs-Flash migration paths.

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