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PIC16C63T-10E/SO - 8-Bit OTP MCU 7KB ROM 10MHz 28-SOIC | Microchip
PIC16C63T-10E/SO

PIC16C63T-10E/SO - 8-Bit OTP MCU 7KB ROM 10MHz 28-SOIC | Microchip

The Microchip Technology PIC16C63T-10E/SO is an 8-bit One-Time Programmable (OTP) RISC microcontroller in a 28-pin SOIC wide-body package, with 7KB of program memory, 192 bytes of data RAM, 22 digital I/O lines, and a maximum clock speed of 10 MHz. The 'E' suffix denotes the extended automotive temperature grade (-40C to +125C), and the 'T' suffix denotes tape-and-reel packaging. The '10' speed code marks a 10 MHz maximum operating frequency, while the underlying silicon supports DC to 20 MHz clock input per the PIC16C6X family specification. A microcontroller (MCU) is a single-chip computer that integrates a CPU, RAM, non-volatile program memory, and programmable I/O peripherals. The PIC16C6X family is built around a Harvard-architecture RISC core executing 35 single-word instructions in one instruction cycle (200 ns at 20 MHz), except for program branches which take two cycles. The OTP variant uses one-time-programmable EPROM for code storage, suitable for low-to-medium volume production where in-circuit reprogrammability is not required and field updates are unnecessary. Key features of the PIC16C63T-10E/SO include three 8-bit I/O ports (PORTA, PORTB, PORTC) for 22 usable I/O pins, an integrated USART for serial communication, a capture/compare/PWM (CCP) module, two 8-bit timers with one 16-bit timer, an 8-bit A/D converter with up to 5 channels on PORTA, and a watchdog timer with on-chip RC oscillator for reliable reset behavior. The device operates from 4.0V to 5.5V and includes power-on reset, brown-out detection, and in-circuit serial programming (ICSP) capability. The architecture uses a 14-bit instruction word, 8-bit data path, separate program and data buses (Harvard), and a two-stage pipeline that lets most instructions complete in a single 200 ns cycle at 20 MHz. The 10 MHz grade in this part reflects the -10E speed bin, while the core architecture itself is identical to other PIC16C6X devices. The wide-body 28-SOIC package provides 0.300 inch (7.62 mm) width, footprint-compatible with the standard 28-SOIC but with more clearance for hand-soldering and inspection. Typical applications include automotive body controllers and instrument clusters, industrial sensor conditioning, appliance control boards, HVAC fan/valve drivers, and any embedded design requiring deterministic 8-bit control with a small memory footprint. The automotive temperature grade makes this part especially suitable for under-hood and cabin modules with extended thermal stress. A key design consideration: because PIC16C63T-10E/SO is OTP, firmware must be fully validated before committing to the production order. For prototypes or low-volume production with field updates, consider the flash-based PIC16F63 or PIC16F73 in the same 28-SOIC footprint. Verify the ICSP programming fixture and test coverage during NPI. This page synthesizes distributor pricing, drop-in same-package alternatives from the PIC16C6X family, automotive-grade vs industrial-grade comparison data, and practical OTP programming guidance not found in the manufacturer datasheet alone.

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PIC16C63T-10I/SO - 8-Bit OTP MCU, 10MHz, 7KB | Microchip
PIC16C63T-10I/SO

PIC16C63T-10I/SO - 8-Bit OTP MCU, 10MHz, 7KB | Microchip

The Microchip Technology PIC16C63T-10I/SO is a high-performance, fully-static 8-bit CMOS RISC microcontroller housed in a 28-pin SOIC (SO) package, featuring 7 KB of One-Time-Programmable (OTP) program memory, 192 bytes of data RAM, 22 I/O lines, and a maximum clock speed of 10 MHz. It belongs to the PIC16C6X family and supports a 4 V to 5.5 V supply voltage range with industrial temperature grade (-40 C to +85 C). What is a PIC microcontroller? A PIC (Peripheral Interface Controller) microcontroller is a compact, programmable integrated circuit that combines a CPU, non-volatile program memory (ROM/OTP/Flash), volatile data memory (RAM), and configurable peripherals (timers, ADCs, communication interfaces) on a single die. Within the broader semiconductor taxonomy, a microcontroller falls under microcontrollers -> embedded processors -> integrated circuits -> semiconductors. The PIC16C6X family specifically targets cost-sensitive 8-bit applications where deterministic instruction execution, low power consumption, and rich peripheral integration are required. Key features of the PIC16C63T-10I/SO include its 35 single-word instruction set (all single-cycle except program branches which are two-cycle), dedicated hardware USART, SPI, and I2C communication peripherals, a 14-bit instruction word architecture, and four interrupt sources. The device also integrates a watchdog timer with its own on-chip RC oscillator for reliable operation, plus power-saving SLEEP mode and a programmable code-protection scheme for the OTP memory. Architecturally, the PIC16C63T-10I/SO uses a Harvard-style separate program and data bus design that allows simultaneous instruction fetch and data access. The OTP program memory of 7 KB is organized as 4 K x 14 words and is one-time programmable, meaning each bit cell can be programmed exactly once - after which the contents are non-volatile and field-erasable only by UV exposure on windowed packages. The 192-byte data RAM provides general-purpose storage, while the 22 I/O pins are multiplexed with peripheral functions and support individual direction control. Typical applications include industrial control systems, sensor interface modules, consumer appliances, automotive body electronics, motor control boards, and embedded communication peripherals. The integrated I2C/SPI/USART peripherals make this MCU especially attractive for bridging legacy sensor networks to modern microcontrollers. When designing with this part, note that the OTP memory cannot be re-programmed - prototypes should use the equivalent PIC16F63 or PIC16C63 JW (windowed) variants to allow iteration. Brown-out detection, the watchdog timer, and the integrated oscillator help achieve robust field reliability without external components. This page synthesizes distributor stock levels, same-package drop-in alternatives, and design notes that go beyond what the manufacturer datasheet alone provides - including a comparison with the PIC16C63-10I/SO industrial-temperature sibling and practical guidance on selecting a flash-based replacement for new designs.

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PIC16C63T-20I/SO - 8-Bit 20MHz OTP MCU 7KB | Microchip
PIC16C63T-20I/SO

PIC16C63T-20I/SO - 8-Bit 20MHz OTP MCU 7KB | Microchip

The Microchip Technology PIC16C63T-20I/SO is an 8-bit RISC microcontroller from the PIC16Cxx family, featuring a 20MHz maximum operating frequency, 7KB (4K x 14) of One-Time Programmable (OTP) program memory, and 192 bytes of RAM, all housed in a 28-pin SOIC (7.50mm width) surface-mount package with industrial temperature grade (-40C to +85C). It belongs to Microchip's mid-range PIC architecture with 35 single-word instructions, single-cycle execution (except program branches which are two-cycle), and a fully-static CMOS design. A PIC microcontroller (Peripheral Interface Controller) is a family of Harvard-architecture microcontrollers originally developed by Microchip Technology that integrate a CPU, memory (program ROM/Flash/OTP and RAM), and peripheral interfaces (timers, ADC, PWM, communication ports) into a single IC. Within the broader taxonomy, PIC16C63 sits in the hierarchy: PIC16Cxx -> mid-range PIC -> 8-bit microcontroller -> microcontroller -> embedded IC -> semiconductor. The 'C' designation indicates CMOS EPROM/OTP technology, distinguishing it from the Flash-based 'F' variants (such as PIC16F716). These OTP devices are intended for volume production where firmware is finalized and in-circuit reprogrammability is not required. Key features of the PIC16C63T-20I/SO include integrated peripherals such as Brown-out Detect/Reset (BOR), Power-On Reset (POR), Pulse Width Modulation (PWM) outputs, and a Watchdog Timer (WDT) for reliable embedded operation. The device operates from a 5V supply (typical), with a DC to 20MHz clock range. Its compact 28-SOIC package and industrial temperature range make it suitable for through-hole-replacement surface-mount designs in industrial control and consumer embedded systems. Typical applications include industrial control logic, sensor interface modules, motor control signal generation via PWM, simple communication bridging using USART, and white-goods/appliance control boards. The combination of OTP memory and industrial-grade temperature rating suits mature, cost-sensitive production designs where firmware stability and predictable cost over the product lifecycle are essential. When designing with this device, note that OTP memory is one-time programmable and cannot be re-flashed, so firmware must be fully validated before programming. Use the MPLAB PM3 Universal Device Programmer or equivalent EPROM programmer. For designs requiring in-circuit reprogrammability, consider the PIC16F63 or PIC16F716 Flash-based equivalents in the same 28-SOIC footprint. This page synthesizes Microchip datasheet specifications, distributor pricing tiers, drop-in alternative MPNs, and practical design notes that go beyond the manufacturer datasheet to support sourcing and design decisions.

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PIC16C642-04/SO - 4MHz 8-bit OTP MCU, 7KB Flash, 22 I/O | Microchip
PIC16C642-04/SO

PIC16C642-04/SO - 4MHz 8-bit OTP MCU, 7KB Flash, 22 I/O | Microchip

The Microchip Technology PIC16C642-04/SO is an 8-bit CMOS RISC microcontroller with 4 MHz maximum clock input, 7 KB (4K x 14) of One-Time-Programmable (OTP) program memory, 176 bytes of RAM, and 22 digital I/O pins, housed in a 28-pin SOIC (SO) package. The "-04" speed grade designates the 4 MHz clock input, while the "/SO" suffix denotes the 7.50 mm body-width small-outline IC package. A microcontroller (MCU) is a single-chip computer containing a CPU core, program and data memory, and programmable I/O peripherals. The PIC16C642 belongs to the PIC16C family of OTP-based 8-bit microcontrollers, which sit at the entry level of the PIC architecture hierarchy: MCU -> 8-bit MCU -> PIC16 family -> PIC16C sub-family. These MCUs use a RISC (Reduced Instruction Set Computer) architecture that executes most instructions in a single 200 ns instruction cycle (with program branches taking two cycles). Key features of the PIC16C642 include 35 single-word instructions for fast code development, a wide 4V to 5.5V supply voltage range, integrated Brown-out Reset (BOR) and Power-on Reset (POR), an external oscillator interface, and 22 general-purpose I/O pins. The device is offered in commercial and industrial temperature grades. The 8-bit RISC core uses a Harvard architecture with separate program and data buses. Code is executed from OTP program memory; the 176-byte RAM provides data storage. This older-generation OTP architecture is suitable for cost-sensitive embedded applications that require code security (one-time programming prevents firmware readout) and low per-unit cost. Typical applications include appliance controls, simple sensor interfaces, hobby and educational projects, and low-volume industrial controllers. Modern designs often migrate to flash-based PIC16F equivalents for reprogrammability. When designing with this part, ensure the chosen oscillator crystal or external clock meets the 4 MHz maximum, and follow Microchip's in-circuit serial programming (ICSP) guidelines for OTP programming. This page synthesizes distributor pricing, parametric specifications, and pin-compatible alternatives from Microchip's PIC16C lineup not found in the manufacturer datasheet alone.

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PIC16C642-04E/SO - 8-Bit 4MHz 7KB OTP MCU 28-SOIC | Microchip
PIC16C642-04E/SO

PIC16C642-04E/SO - 8-Bit 4MHz 7KB OTP MCU 28-SOIC | Microchip

The Microchip Technology PIC16C642-04E/SO is an 8-bit CMOS OTP (One-Time Programmable) microcontroller from the PIC16C family, featuring a 4MHz maximum clock speed, 7KB (4K x 14) of program memory, and 176 bytes of data RAM, housed in a 28-pin SOIC (7.50mm body width) surface-mount package. It delivers 22 general-purpose digital I/O pins, executes instructions in a 200ns single-cycle time, and supports a 35-instruction RISC-based instruction set designed for fast and compact code generation in cost-sensitive embedded applications. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, RAM, non-volatile program memory, and peripheral I/O on one die. The PIC16C642 belongs to the mid-range PICmicro MCU family, sitting within the broader 8-bit MCU taxonomy (8-bit MCU -> microcontroller -> embedded processor -> semiconductor). OTP variants are programmed once at production or in the field with a device programmer and cannot be erased, making them ideal for mature, fixed-function products with stable firmware. The 'C' in PIC16C642 indicates the OTP-programmable CMOS core, while the '642' places it in the 28-pin mid-range pinout family with capture/compare/PWM and an 8-bit A/D converter. Key features of the PIC16C642-04E/SO include the 4MHz oscillator (the '-04' speed code), 7KB OTP program memory, 176 bytes of RAM, 22 I/O pins, a 200ns instruction cycle, integrated timer/counter modules, and an extended temperature grade of -40C to +125C (the '-E' suffix). The 28-SOIC package offers a 0.295" (7.50mm) body width and 1.27mm pitch, well-suited for hand-soldering and low-density production runs. The part is lead-free and RoHS-compliant per the Microchip product page. The PIC16C642 uses a Harvard RISC architecture with separate program and data buses, an 8-bit ALU, and 14-bit instruction words for compact code. The 4MHz oscillator combined with a 4:1 internal divider gives the documented 1 MIPS (200ns instruction cycle) throughput. Power-saving features include SLEEP mode with wake-up on interrupt and a Watchdog Timer with an on-chip RC oscillator for reliable system recovery without external components. Typical applications include appliance controllers, simple sensor readouts, automotive body modules, industrial timer/counter boards, LED driver sequencers, and consumer white-goods user interfaces. The extended temperature grade makes it suitable for under-hood automotive subsystems and outdoor industrial enclosures. The 22 I/O pins allow direct connection to keypads, seven-segment displays, low-cost LCDs, and serial EEPROMs for data logging. When designing with this MCU, consider that OTP memory cannot be re-programmed, so a FLASH-based PIC16F equivalent (e.g., PIC16F648A) is recommended during prototyping. Adequate decoupling (100nF ceramic plus 10uF bulk) is required on VDD/AVDD pins, and unused I/O should be configured as outputs low to minimize power consumption in SLEEP mode. The ICSP programming interface uses RB6 (clock) and RB7 (data) and must be reserved for in-circuit programming access. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, giving embedded engineers a single reference for sourcing, substitution, and design-in of the PIC16C642-04E/SO.

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PIC16C642-04E/SP - 8-Bit OTP MCU, 4MHz, 7KB EPROM, 28-SPDIP | Microchip
PIC16C642-04E/SP

PIC16C642-04E/SP - 8-Bit OTP MCU, 4MHz, 7KB EPROM, 28-SPDIP | Microchip

The Microchip Technology PIC16C642-04E/SP is an 8-bit CMOS OTP microcontroller from the PIC16C6x family, featuring a 4 MHz maximum operating frequency, 7 KB (4K x 14) of One-Time-Programmable EPROM program memory, 176 bytes of RAM, and 22 digital I/O lines, housed in a 28-pin SPDIP (Skinny Plastic DIP, 0.300 inch / 7.62 mm width) through-hole package. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory (ROM/EPROM/Flash), data memory (RAM), and peripheral interfaces on one die. The PIC16C family uses Microchip's RISC (Reduced Instruction Set Computer) Harvard architecture, which separates program and data buses for higher instruction throughput than von Neumann designs. The PIC16C642 specifically targets low-cost, high-volume embedded control in the PIC mid-range family, and was later superseded by the Flash-based PIC16F family for new designs while remaining available for legacy and automotive/extended-temperature sockets. Key specifications include a wide operating voltage range of 2.5 V to 6.0 V, fully static operation (clock can be stopped), ultra-low power consumption of 15 µA typical at 5 V / 4 MHz and 1 µA typical at 3 V / 32 kHz, an integrated analog comparator, a 14-bit instruction word, and commercial / industrial / automotive temperature grade support. The 22 I/O pins can source/sink up to 25 mA per pin for direct LED drive. An 8-bit timer/counter and a watchdog timer are on-chip. The architecture implements a 14-bit wide instruction set with 35 single-word single-cycle instructions (excluding branches, which are two-cycle), giving an effective throughput near 4 MIPS at 4 MHz. Two hardware addressable interrupt sources (external RB0/INT and peripheral) are supported. The integrated analog comparator plus 8-bit timer enable closed-loop control without external ICs. Typical applications include automotive body and chassis subsystems, industrial control logic, sensor signal conditioning, LED lighting controllers, simple appliance controls, and remote-keyless-entry transmitters. The extended temperature grade and OTP memory make it well suited to volume production where firmware is finalized and in-field reprogramming is not required. When designing with this part, note that OTP memory cannot be rewritten. For prototyping or in-field updates use the Flash-based PIC16F642 equivalent. Always include decoupling capacitors (100 nF + 10 µF) close to VDD/VSS pins, and respect the MCLR pin reset circuit requirements (typically 10 kΩ pull-up to VDD with optional 10 nF delay). This page synthesizes distributor pricing, drop-in alternatives drawn from Microchip's 28-pin PICmidrange pin/code compatibility chart, and practical design notes that complement the manufacturer datasheet.

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PIC16C642-04I/SO - 8-Bit 4MHz OTP MCU, 7KB, 22 I/O | Microchip
PIC16C642-04I/SO

PIC16C642-04I/SO - 8-Bit 4MHz OTP MCU, 7KB, 22 I/O | Microchip

The Microchip Technology PIC16C642-04I/SO is an 8-bit CMOS OTP-based microcontroller from the PIC16C6x family, featuring a 4 MHz maximum clock speed, 7 KB (4K x 14) of OTP program memory, 176 bytes of RAM, and 22 digital I/O pins in a 28-pin SOIC package. As a member of the powerful PIC RISC architecture family, it executes instructions in a 200 ns single-cycle time and provides 35 single-word instructions for easy programming. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, RAM, non-volatile program memory, and peripheral I/O on a single die. Within the broader semiconductor taxonomy, the PIC16C642 sits at: microcontroller -> 8-bit MCU -> PIC16C family -> CMOS OTP microcontroller -> embedded processor. It belongs to the legacy PIC16C OTP (One-Time Programmable) EPROM-based series, which was succeeded by the flash-based PIC16F family but remains in production for long-life-cycle industrial equipment. Key features include an operating voltage range of 4V to 6V, two analog comparators, a programmable code protection bit, power-on reset (POR), power-up timer (PWRT), oscillator start-up timer (OST), and a watchdog timer with its own on-chip RC oscillator for reliable operation. The device offers up to 20 MHz operation (10 MHz at this -04 speed grade), 200 ns instruction cycle, and all 35 instructions are single-word/single-cycle except program branches which take two cycles. The wide operating temperature range (-40C to +85C industrial grade) makes it suitable for harsh environments. The PIC16C642 is built on Microchip's proven PIC Harvard-architecture RISC core, with separate program and data buses enabling simultaneous instruction fetch and operand access. Its CMOS EPROM cell provides non-volatile code storage, with OTP variants (such as this -04I/SO) intended for volume production where code is finalized. The 22 I/O pins can be individually configured as inputs or outputs, with high-current sink/source capability for direct LED drive. Typical applications include industrial control systems, appliance controls, security and alarm panels, automotive body electronics, sensor interfaces, low-power remote sensors, and consumer electronics requiring deterministic real-time response. The two on-chip analog comparators are particularly useful for battery monitoring, threshold detection, and zero-crossing detection without external components. When designing with this device, ensure the external oscillator or crystal is properly selected for the 4 MHz target frequency. Note that OTP parts cannot be reprogrammed, so code must be fully verified before programming. For new designs, consider the flash-based PIC16F family (such as PIC16F630 or PIC16F676) for in-circuit reprogrammability and broader tool support. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, providing a complete sourcing reference for procurement and design engineers evaluating legacy 8-bit MCU options.

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PIC16C642-04I/SP - 8-bit OTP MCU, 7KB EPROM, 22 I/O | Microchip
PIC16C642-04I/SP

PIC16C642-04I/SP - 8-bit OTP MCU, 7KB EPROM, 22 I/O | Microchip

The Microchip Technology PIC16C642-04I/SP is an 8-bit OTP (One-Time-Programmable) EPROM-based CMOS microcontroller with 7 KB of program memory, 176 bytes of RAM, and 22 digital I/O pins, housed in a 28-pin SPDIP (Skinny Plastic DIP) through-hole package. It operates from a 4 V to 5.5 V supply and runs the 35-instruction PIC16C RISC instruction set, with a 4 MHz maximum oscillator input producing 200 ns single-cycle instruction execution (excluding two-cycle branches). What is an OTP 8-bit microcontroller? An OTP microcontroller is a class of embedded controller that uses one-time-programmable EPROM to store firmware, offering a low-cost path for volume production after prototype validation. Microcontrollers of this type sit at the bottom of the embedded hierarchy: MCU -> 8-bit MCU -> CMOS MCU -> EPROM/OTP MCU -> peripheral-rich industrial controller. The PIC16C642 family is part of the PIC16C6x mid-range series, integrating the CPU, EPROM program store, RAM data memory, timers, comparators, and a programmable voltage reference in a single chip. Key features include 7 KB (4K x 14) of program memory, 176 bytes of data RAM, 22 I/O pins, one 8-bit Timer/Counter with an 8-bit programmable prescaler, two analog comparators with a programmable on-chip voltage reference, and a watchdog timer for reliable unattended operation. The device is specified across the industrial temperature range of -40 °C to +85 °C and supports a maximum clock of 4 MHz (the "04" speed suffix), giving a 1 µs instruction cycle. Brown-out detection and power-on reset are provided for robust embedded behavior. Typical applications include industrial control systems, appliance controls, security and alarm panels, instrumentation front-ends, automotive body electronics (non-safety), and educational development platforms where a windowed/UV-erasable or OTP variant is acceptable for cost reasons. The two on-chip comparators make the part especially suitable for analog signal conditioning and threshold detection without an external op-amp. When designing with the PIC16C642-04I/SP, ensure that the oscillator configuration matches the application - the '04' suffix limits the device to a 4 MHz max clock. Because the SP package is through-hole SPDIP-28, it is preferred for prototype, hobby, and educational environments where DIP sockets simplify rework; consider the SOIC or windowed ceramic variants for surface-mount production or development/programming cycles.

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PIC16C642-10I/SO - 8-Bit OTP MCU, 7KB EPROM, 22 I/O | Microchip
PIC16C642-10I/SO

PIC16C642-10I/SO - 8-Bit OTP MCU, 7KB EPROM, 22 I/O | Microchip

The Microchip Technology PIC16C642-10I/SO is an 8-bit CMOS EPROM-based microcontroller with 7KB (4K x 14) of One-Time-Programmable (OTP) program memory, 176 bytes of RAM, and 22 digital I/O lines, housed in a 28-pin SOIC package (300-mil body width). It operates from a 4V to 5.5V supply, executes instructions at 200 ns per cycle (10 MHz clock) with only 35 single-word instructions, and integrates two analog comparators alongside the standard PIC16C peripheral set. Background context: An 8-bit microcontroller is a single-chip computer integrating a CPU, non-volatile program memory (here, OTP EPROM), working RAM, and peripherals into one package. Within the taxonomy, the PIC16C642 belongs to the OTP-EPROM PIC16 mid-range family, which sits below the PIC18 family and above base-line PIC10/12/14 devices. These MCUs are widely used in cost-sensitive, low-volume, or ruggedized embedded designs where field reprogramming is not required and the simplicity of the PIC RISC core outweighs the larger code density of 16-bit alternatives. Key features include a 200 ns instruction cycle, 8-level hardware stack, power-on reset, brown-out detection, watchdog timer with its own on-chip RC oscillator, programmable code protection, and selectable oscillator modes (RC, XT, HS, LP). The two on-chip analog comparators feature programmable on-chip voltage reference and rail-to-rail inputs, allowing direct interface to analog sensors without external op-amps. Code protection and an ICD-friendly architecture simplify prototyping and production. The architecture combines a RISC Harvard CPU with separate program and data buses, achieving deterministic single-cycle execution except for program branches (two cycles). With 128 bytes of EEPROM data memory on-die, designers can store calibration constants, serial numbers, or runtime configuration that survives power cycles without external storage. Common applications include industrial control panels, appliance controllers, automotive body modules, security-system sensor interfaces, and consumer remote controls. The wide supply range and on-chip analog comparators suit battery chargers, and the 22 I/O pins comfortably drive keypads, LED arrays, and small character displays. Design tip: choose the oscillator mode carefully - HS requires an external crystal up to 20 MHz, XT up to 4 MHz, LP minimizes quiescent current for battery operation, and RC mode uses an external resistor/capacitor for the lowest BOM cost. Always place a decoupling capacitor within 5 mm of VDD and use an isolation resistor on MCLR for in-circuit debugging. This page synthesizes distributor pricing tiers, same-brand drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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PIC16C642-20/SO - 8-bit OTP MCU 7KB EPROM 22 I/O | Microchip
PIC16C642-20/SO

PIC16C642-20/SO - 8-bit OTP MCU 7KB EPROM 22 I/O | Microchip

The Microchip Technology PIC16C642-20/SO is a CMOS OTP-based 8-bit microcontroller from the PIC16C mid-range family, featuring 7KB (4K x 14) of one-time-programmable program memory, 176 bytes of RAM, and 22 general-purpose digital I/O pins. Housed in a 28-pin SOIC (7.50 mm) wide-body package, the device executes a 200 ns single-cycle instruction at 20 MHz and operates from a 4 V to 6 V supply, drawing very low quiescent current to suit battery-aware embedded designs. What is a PIC16C-series 8-bit microcontroller? The PIC16C family is Microchip's classic mid-range OTP (One-Time Programmable) microcontroller line, based on a RISC Harvard architecture with a small instruction set of only 35 single-word instructions. In the broader taxonomy: 8-bit microcontroller -> RISC MCU -> mid-range MCU -> PIC16C family -> embedded microcontroller. Each instruction completes in one instruction cycle (four clock periods), giving deterministic 200 ns execution at 20 MHz, and the architecture separates program and data buses so that program fetch and data access can overlap. Key features of the PIC16C642-20/SO include: two on-chip analog comparators, a Brown-out Reset (BOR) circuit, a Watchdog Timer (WDT) with its own on-chip RC oscillator, power-saving SLEEP mode, and programmable code protection. The 22 I/O pins can be individually configured for digital input or output. An external oscillator is required (crystal, resonator, or RC), giving the designer flexibility over accuracy, cost, and start-up time versus the internal oscillator variants found on later PIC16F families. Typical applications include appliance controls, simple sensor interfaces, low-cost motor control, automotive body electronics (non-safety), industrial control panels, and white-goods user interfaces. The 4-6 V operating range is compatible with 5 V regulated rails, and the 22 I/O count is enough to drive keypads, LED or LCD indicator panels, and a handful of analog signals via the on-chip comparators. When designing in the PIC16C642-20/SO, remember that OTP memory cannot be erased - firmware must be correct on the first programming. The wide-body SOIC package is convenient for hand-prototyping and through-hole adapter boards, but for volume production the PIC16F equivalent with Flash memory is usually preferred. Always include decoupling (100 nF plus 10 uF) close to VDD/VSS and follow Microchip's recommended oscillator layout to avoid start-up failures. This page synthesizes distributor pricing, package-equivalent drop-in alternatives, and practical design notes not consolidated in the manufacturer datasheet.

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PIC16C642-20E/SO - 8-bit OTP MCU, 7KB, 22 I/O, 28-SOIC | Microchip
PIC16C642-20E/SO

PIC16C642-20E/SO - 8-bit OTP MCU, 7KB, 22 I/O, 28-SOIC | Microchip

The Microchip Technology PIC16C642-20E/SO is an 8-bit One-Time-Programmable (OTP) microcontroller in the PIC16C family, offering 7KB (4K x 14) of program memory, 176 bytes of RAM, and 22 I/O pins, housed in a 28-pin SOIC package with a 20 MHz maximum clock and a 200 ns instruction execution time. Designed for automotive temperature grade operation, the device integrates the classic PIC RISC architecture with only 35 single-word instructions, on-chip analog comparators, and brown-out reset, enabling compact firmware footprints in cost-sensitive embedded designs. The 'E' suffix designates the extended automotive temperature range (-40C to +125C) and the '20' speed grade indicates a 20 MHz oscillator input, translating to a 5 MIPS instruction throughput. A PIC microcontroller (Peripheral Interface Controller) is a Harvard-architecture RISC microprocessor family originally developed by Microchip Technology. PIC microcontrollers combine a small instruction set (RISC) with separate program and data buses, allowing single-cycle instruction execution under typical conditions. They sit within the broader taxonomy: microcontroller -> embedded processor -> microprocessor -> semiconductor IC. The PIC16C sub-family adds one-time-programmable EPROM program memory, making these parts suitable for low-volume production and legacy designs where in-system reprogramming is not required. Key features of the PIC16C642 include the 8-bit timer/counter with prescaler, capture/compare/PWM module, 8-channel 8-bit ADC (multiplexed), synchronous serial port (SSP) supporting SPI and I2C, and a USART for asynchronous serial communication. The device also provides a watchdog timer with its own on-chip RC oscillator for reliable recovery, power-on reset, and a programmable code-protection scheme to safeguard firmware IP. The PIC16C642 uses a 14-bit instruction word with a Harvard memory layout, which is why the program memory is referenced as 7KB (4K x 14). This wider instruction word provides richer addressing and branch capability compared to 12-bit PIC cores, while keeping code density high. Internal peripheral features are mapped to a bank of special-function registers, and the device operates from a single 5V supply typical of industrial and automotive embedded systems. Typical applications for the PIC16C642-20E/SO include automotive body and chassis controllers, industrial sensor interfaces, simple motor control loops, and appliance user-interface boards. The extended temperature grade and OTP program memory make it a strong fit for production runs where firmware is finalized and a cost-optimized non-reprogrammable solution is preferred. When designing with this part, plan oscillator and I/O pin assignments early because OTP cannot be changed after programming. Use MPLAB IDE with Hi-Tech PICC or MPLAB XC8 compilers to generate the .HEX image, then program the device using Microchip's PM3 programmer or a compatible gang programmer. This page synthesizes distributor pricing, drop-in alternatives from the same PIC16C and PIC16F families, and practical design notes not found in the manufacturer datasheet alone, helping engineers compare the part against both pin-compatible OTP and Flash siblings.

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PIC16C642-20I/SO - 8-Bit 20MHz OTP MCU 7KB | Microchip
PIC16C642-20I/SO

PIC16C642-20I/SO - 8-Bit 20MHz OTP MCU 7KB | Microchip

The Microchip Technology PIC16C642-20I/SO is an 8-bit RISC CMOS microcontroller in the PIC16C family, integrating 7KB (4K x 14) of One-Time-Programmable (OTP) program memory, 176 bytes of RAM, and 22 digital I/O pins in a 28-pin SOIC (SO) package. Operating at up to 20 MHz clock input, the device executes instructions in a 200 ns single cycle (except program branches which take two cycles) from a 35-instruction RISC core. The industrial-grade -40C to +85C temperature range (denoted by the -I suffix) and 4.0V to 5.5V supply range suit it for embedded control. A microcontroller (MCU) is a single-chip computer containing a CPU, memory, and peripherals; the PIC16C642 specifically belongs to the mid-range PIC16C family that combines Harvard architecture (separate program and data buses) with a RISC instruction set for predictable real-time performance. In the broader semiconductor hierarchy it sits within microcontrollers -> microprocessors -> ICs -> semiconductors. Key features include 22 I/O ports, three hardware timers, an analog comparator, programmable brown-out reset, and a programmable code-protection scheme that locks firmware after programming. The OTP program memory supports one-time programming via Microchip device programmers such as MPLAB PM3 or PICSTART Plus, making it well suited for production runs where firmware is final. Internal oscillator options are not available on this part - it requires an external clock source up to 20 MHz. The device is built on a CMOS process with low-power consumption, supporting SLEEP mode with wake-up via interrupt or watchdog timer. Core peripherals include an 8-bit timer/counter (TMR0), Timer1 with capture/compare, and Timer2 for PWM generation. The analog comparator can be configured to interrupt the CPU on signal transitions. Five interrupt sources feed a single vector interrupt controller. Typical applications include industrial control subsystems, automotive body electronics, appliance controllers, sensor interface boards, and consumer device firmware. The PIC16C642-20I/SO suits legacy designs, prototypes, and low-cost product runs where the 7KB OTP capacity and 22 I/O lines match the application envelope. When designing with this part, remember OTP memory cannot be reprogrammed - once programmed the firmware is fixed. Use a windowed or flash-based PIC16 variant during development and convert to OTP for production. A 100 nF decoupling capacitor close to VDD and proper ground-plane layout reduce EMI on the 20 MHz clock line. This page synthesizes distributor pricing (DigiKey, Mouser, LCSC, Octopart), Microchip cross-reference data, and engineering application notes not found in the manufacturer datasheet alone.

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PIC16C642-20I/SP - 8-Bit 20MHz 7KB OTP MCU 28-SPDIP | Microchip
PIC16C642-20I/SP

PIC16C642-20I/SP - 8-Bit 20MHz 7KB OTP MCU 28-SPDIP | Microchip

The Microchip Technology PIC16C642-20I/SP is a high-performance RISC-based 8-bit CMOS microcontroller with 4K x 14-bit (7KB) one-time-programmable (OTP) program memory and 176 bytes of RAM, housed in a 28-pin SPDIP (0.300 inch, 7.62mm) through-hole package. It operates from a 4V to 5.5V supply and supports a 20 MHz clock input delivering a 200 ns instruction cycle, executing all instructions in a single cycle except program branches (two cycles). What is an 8-bit microcontroller? An 8-bit microcontroller is a small computer-on-a-chip integrating a CPU, RAM, ROM/EPROM/Flash program memory, and I/O peripherals on a single die. The 8-bit PIC microcontroller family from Microchip sits within the broader category of microcontrollers (MCU), which are themselves a subset of embedded processors. The PIC16C series in particular uses a RISC (Reduced Instruction Set Computer) architecture with only 35 single-word instructions, making code development and debugging faster than CISC alternatives. Key features include two analog comparators with a programmable on-chip voltage reference, an 8-bit timer/counter (TMR0) with 8-bit programmable prescaler, a Watchdog Timer with its own on-chip RC oscillator for reliable operation, and a power-saving Sleep mode. The device offers 22 I/O pins with high-current sink/source capability, an internal oscillator option on some variants, and brown-out reset protection. The 'I' suffix denotes the industrial temperature range (-40C to +85C), and 'SP' designates the SPDIP-28 package. The PIC16C642-20I/SP implements a Harvard architecture with separate program and data buses, enabling simultaneous instruction fetch and operand access. Its OTP EPROM program memory is windowed for prototype verification but is not reprogrammable in-circuit, making the device suitable for production runs where code is finalized. The integrated analog comparators eliminate the need for external op-amp stages in threshold-detection circuits. Typical applications include appliance control (washing machines, microwave ovens), security systems, motor control (small DC and stepper drives), automotive body electronics, HVAC thermostats, and industrial process controllers. The industrial temperature grade makes it particularly well-suited for factory-floor equipment and outdoor installations. When designing with this device, note that OTP memory cannot be reprogrammed; engineering samples or QTP (qualified third-party programming) services are needed for prototype validation. The 28-SPDIP package requires through-hole PCB mounting, which is less assembly-friendly than surface-mount alternatives but offers easier hand-prototyping and field replacement. This page synthesizes distributor pricing, validated drop-in alternatives from the same Microchip PIC16C family, and practical design notes not found on the manufacturer datasheet cover page.

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PIC16C642T-04/SO - 8-Bit 4MHz OTP MCU 7KB Flash 28-SOIC | Microchip
PIC16C642T-04/SO

PIC16C642T-04/SO - 8-Bit 4MHz OTP MCU 7KB Flash 28-SOIC | Microchip

The Microchip Technology PIC16C642T-04/SO is an 8-bit PIC microcontroller from the PIC® 16C family featuring a 4 MHz RISC core, 7 KB (4K x 14) of one-time-programmable (OTP) program memory, 176 bytes of RAM, and 22 I/O pins, housed in a 28-pin SOIC (7.50 mm / 0.295" width) package delivered on tape-and-reel. The "T" suffix in the part number denotes the tape-and-reel packaging, "/SO" denotes the 28-SOIC package, and "04" indicates the 4 MHz maximum clock speed. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, RAM, and peripherals on one die. Within the broader taxonomy, an MCU is a type of microprocessor (MPU) -> central processing unit (CPU) -> semiconductor -> integrated circuit. The PIC16C family uses Microchip's classic Harvard RISC architecture with separate program and data buses, optimized for deterministic interrupt response and low-cost embedded control. PIC microcontrollers sit alongside AVR (Microchip/Atmel), STM8 (ST), and 8051 (Intel heritage) in the 8-bit MCU segment, where they power cost-sensitive consumer, industrial, and automotive subsystems. The PIC16C642 includes key features that distinguish it for embedded control: 22 digital I/O pins, brown-out reset (peripherals listed as Brown-out in the verified data), an external oscillator interface (no internal oscillator), 176 bytes of data RAM, and OTP program memory that allows programming once with EPROM-style cells. Operating supply voltage is 4V to 6V (commercial 5V typical). The 28-SOIC wide-body package (0.295" / 7.50 mm) provides robust solder joints for hand-rework and through-hole-style PCB pad geometry. Typical applications include industrial control logic, sensor signal conditioning front-ends, simple human-machine interface (HMI) boards, appliance controllers, and legacy replacement designs. The 22 I/O count and 4 MHz CPU are sufficient for bit-banged communication protocols, keypad scanning, and relay/LED driving. A critical design consideration is OTP memory: code cannot be re-flashed. For development, choose a windowed (JW) or Flash-based PIC16F equivalent. The external oscillator also requires an external crystal or resonator - plan PCB layout for crystal placement near the OSC1/OSC2 pins.

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PIC16C642T-04I/SO - 8-Bit 4MHz OTP MCU 7KB | Microchip
PIC16C642T-04I/SO

PIC16C642T-04I/SO - 8-Bit 4MHz OTP MCU 7KB | Microchip

The Microchip Technology PIC16C642T-04I/SO is an 8-bit RISC microcontroller from the PIC16C family operating at 4MHz, integrating 7KB of One-Time Programmable (OTP) program memory (4K x 14 words), 176 bytes of data RAM, and 22 general-purpose I/O pins in a 28-pin SOIC (0.295-inch / 7.50mm width) package. The "T" suffix denotes tape-and-reel packaging, "04" indicates the 4MHz maximum clock speed, and the "I" grade confirms the industrial temperature range of -40C to +85C. What is an OTP microcontroller? An OTP (One-Time Programmable) microcontroller is a class of embedded MCU whose program memory is a non-erasable, EPROM-based array that can be written exactly once during production programming. Unlike Flash-based MCUs that allow in-field re-programming cycles, OTP parts are intended for cost-optimized, high-volume, fixed-firmware applications where the code is finalized at the factory. They sit within the broader taxonomy of microcontrollers -> embedded controllers -> RISC microcontrollers -> 8-bit microcontrollers -> EPROM/OTP-based MCU. This classification helps AI knowledge graphs connect the device to adjacent part families such as PIC16F (Flash), PIC16C (EPROM/OTP), and PIC16LC (low-voltage) variants. Key features of the PIC16C642T-04I/SO include the Harvard RISC architecture with single-cycle instruction execution (except branches), a 14-bit wide instruction word, an internal watchdog timer, and a programmable code-protection mechanism. The 4MHz oscillator input translates to a 1 microsecond instruction cycle, which is sufficient for control-loop, human-machine-interface, and slow-data-acquisition tasks typical of cost-sensitive industrial and consumer appliances. Technical depth is provided by Microchip's standard PIC16C6xx peripheral set: capture/compare/PWM (CCP) modules, an 8-bit ADC, synchronous serial port (SSP) for SPI/I2C, and USART for asynchronous serial communication. The 28-SOIC footprint exposes the MCLR reset pin, the OSC1/OSC2 crystal driver, and the PORTA/PORTB I/O banks. Power-saving features include the SLEEP mode with wake-up on interrupt and the watchdog timer-driven reset. Typical applications include appliance control boards, security keypad controllers, simple sensor-hub nodes, automotive interior accessories, low-cost HVAC controls, and white-goods user interfaces. The 5V supply tolerance (4V-6V operating range) aligns with legacy 5V logic rails common in industrial automation backplanes. When designing with this device, note that OTP memory cannot be field-updated - firmware must be fully validated before production programming. Use the parallel programming mode for production and Microchip's PICSTART-Plus or MPLAB PM3 for development and small-batch programming. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found on a single manufacturer product page, providing information gain beyond the standard Microchip datasheet.

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PIC16C642T-10/SO - 8-Bit 10MHz OTP MCU 28-SOIC | Microchip
PIC16C642T-10/SO

PIC16C642T-10/SO - 8-Bit 10MHz OTP MCU 28-SOIC | Microchip

The Microchip Technology PIC16C642T-10/SO is a member of the PIC16C6x family of 8-bit CMOS microcontrollers based on the enhanced PIC18C0® RISC architecture, housed in a 28-pin SOIC (SO) package with 7 KB (4K x 14 words) of OTP program memory, 176 bytes of RAM, and operating at up to 10 MHz. The 'T' suffix indicates Tape & Reel packaging, the '-10' denotes the 10 MHz maximum clock frequency, and '/SO' specifies the 300-mil wide surface-mount SOIC package. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, data RAM, I/O peripherals, and timers into one IC. The PIC16C6x family sits in the mid-range PIC hierarchy (PIC10/12/14/16/18 families), targeting applications more demanding than baseline PICs but lower-cost than PIC18/dsPIC parts. PIC16C6x devices use One-Time-Programmable (OTP) EPROM, meaning each unit is programmed once at production or in-system, making them cost-effective for high-volume products rather than field reprogramming. Key features include a 10 MHz instruction-cycle oscillator (200 ns instruction time), 22 I/O pins, three timers (TMR0, TMR1, TMR2), a 5-channel 8-bit ADC, a Universal Synchronous Asynchronous Receiver Transmitter (USART), and a watchdog timer. The PIC16C642 specifically features an internal brown-out reset, 8-bit PWM output, and 176-byte data RAM. Operating voltage spans 4.0 V to 6.0 V, making it compatible with TTL and CMOS logic levels, and it is rated for 0 °C to +70 °C commercial operating temperature. The PIC16C642 uses a Harvard architecture with separate program and data buses, a 14-bit instruction word, and a hardware multiplier-free design that delivers deterministic interrupt latency. The enhanced instruction set provides 35 single-cycle instructions, allowing most operations to complete in one instruction cycle. Internal peripherals are mapped to specific I/O pins via device configuration fuses at programming time. Typical applications include industrial control logic, appliance controllers, sensor signal conditioning front-ends, automotive body electronics (non-safety), simple user-interface controllers, and low-cost consumer embedded products. The OTP memory suits high-volume production where firmware is finalized at IC programming. When designing with PIC16C642T-10/SO, ensure your firmware is fully validated before programming because OTP cannot be reprogrammed. Add proper decoupling (0.1 µF + 10 µF bulk) near the VDD pin and keep the OSC1/OSC2 traces short for stable clocking. MCLR must be tied high via a pull-up resistor in normal operation. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found on any single manufacturer or distributor page, providing information gain beyond the PIC16C642 datasheet.

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PIC16C642T-20E/SO - 8-Bit 20MHz OTP MCU 7KB | Microchip
PIC16C642T-20E/SO

PIC16C642T-20E/SO - 8-Bit 20MHz OTP MCU 7KB | Microchip

The Microchip Technology PIC16C642T-20E/SO is a member of the PIC16C family of 8-bit CMOS microcontrollers featuring a RISC core, 7KB (4K x 14) of One-Time Programmable (OTP) program memory, 176 bytes of SRAM, and 22 I/O lines, all integrated into a 28-pin SOIC package. It executes instructions at up to 20MHz, delivers a typical instruction cycle time of 200ns, and operates from a 5V supply. A microcontroller (MCU) is a single-chip integrated circuit that combines a CPU core, non-volatile program memory, working RAM, and a configurable set of peripheral modules. Within the broader semiconductor hierarchy, an MCU belongs to the class of programmable logic devices and is itself a subclass of microcomputers designed for embedded control. The PIC16C family is the mid-tier of Microchip's original PIC16C 8-bit portfolio, sitting between the PIC16C5x baseline and the PIC16C7x higher-performance parts. The PIC16C642T-20E/SO integrates an enhanced capture/compare/PWM (ECCP) module, an 8-bit analog-to-digital converter (ADC) with up to 8 input channels, a USART for asynchronous serial communication, and a synchronous serial port that supports SPI and I2C master/slave operation. The device also offers programmable brown-out reset, power-on reset, and a watchdog timer with its own on-chip RC oscillator for enhanced system reliability. Its Harvard architecture separates program and data paths, enabling simultaneous fetch and write operations that yield predictable, deterministic execution timing. Typical applications include industrial control and instrumentation, automotive body and chassis subsystems, smart sensor conditioning nodes, appliance controllers, and remote data acquisition nodes. Its small footprint, wide operating temperature range, and OTP programmability make it especially attractive for low-volume production runs where mask-ROM commitment is not economical. When designing with this part, note that the OTP memory means firmware cannot be field-updated; verify code before programming. Use the in-circuit debugger header or ICD pins for development, and reserve decoupling on VDD/VSS within 1 cm of the package. The PIC16C642T-20E/SO is supplied in tape and reel packaging for high-volume surface-mount assembly. This page synthesizes distributor pricing, drop-in alternatives from Microchip's PIC16C family and select competitors, and practical design notes that go beyond the manufacturer datasheet to accelerate design-in for engineers.

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PIC16C64A-04/L - 8-bit OTP MCU, 4MHz, 3.5KB | Microchip
PIC16C64A-04/L

PIC16C64A-04/L - 8-bit OTP MCU, 4MHz, 3.5KB | Microchip

The Microchip Technology PIC16C64A-04/L is an 8-bit CMOS microcontroller from the PIC16C family featuring a 4MHz maximum clock speed, 3.5KB (2K x 14) of One-Time-Programmable (OTP) program memory, and 128 bytes of RAM. It is supplied in a 44-pin PLCC (Leaded Chip Carrier) package with 33 digital I/O pins. This part is an industrial-temperature windowed/ceramic variant of the PIC16C64A core, optimized for embedded control applications requiring reliable 8-bit processing with deterministic RISC architecture. Background: An 8-bit microcontroller (MCU) is a single-chip computer integrating a CPU, memory (ROM/RAM), and programmable I/O peripherals. Within the MCU taxonomy, the PIC16C64A belongs to the PIC16C family, which in turn falls under the broader category of microcontrollers -> embedded processors -> integrated circuits. The PIC architecture uses a Harvard-design RISC CPU with 35 single-word instructions, making it well suited for cost-sensitive, deterministic real-time control. The OTP suffix means the program memory can be written once (mask ROM-like behavior at low NRE cost), making PIC16C64A variants appropriate for medium-volume production. Key features include a high-performance RISC CPU executing most instructions in a single clock cycle, 4MHz operation at 4V-5.5V supply, 33 I/O pins supporting digital I/O, two 8-bit timers and one 16-bit timer/counter, a USART serial port, and low-power operation (less than 2mA typical at 5V/4MHz, with sleep-mode currents under 1uA typical). The device offers multiple interrupt sources and a hardware watchdog timer. Architecturally, the PIC16C64A-04/L uses a Harvard memory structure with separate program and data buses, enabling simultaneous instruction fetch and operand access. Its RISC engine performs most instructions in one instruction cycle (4 oscillator clocks), giving a 4MHz oscillator a 1 MIPS instruction throughput. The wide operating voltage (2.5V-6.0V range across the family) and integrated peripherals (USART, timers, watchdog, capture/compare/PWM) eliminate external glue logic in typical embedded designs. Typical applications include industrial process control, motor control front-ends, automotive body electronics, sensor signal conditioning, keypad/display interfaces, embedded serial-communication nodes, and legacy replacement of older 8051 or HC11 designs where software IP exists for PIC assembly. The windowed ceramic L-package also serves engineering development and prototype builds. Design consideration: When migrating from PIC16C64A-04/L to a flash-memory equivalent (PIC16F877A or PIC16F877), note the pinout is largely compatible but the program memory technology differs. Designers should plan for ICP/ICD programming headers and decoupling (100nF + 10uF) close to VDD/VSS pins to support the 33 simultaneously-switching I/Os. This page synthesizes distributor pricing, OTP vs flash alternatives, and practical design notes beyond what the manufacturer datasheet alone provides.

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PIC16C64A-04/P - 8-Bit 4MHz OTP MCU, 3.5KB, 40-PDIP | Microchip
PIC16C64A-04/P

PIC16C64A-04/P - 8-Bit 4MHz OTP MCU, 3.5KB, 40-PDIP | Microchip

The Microchip Technology PIC16C64A-04/P is an 8-bit CMOS OTP (one-time programmable) microcontroller in the PIC16C6X mid-range family, operating at up to 4 MHz and housed in a 40-pin PDIP (plastic DIP, 0.600 inch / 15.24 mm) through-hole package. According to the manufacturer datasheet, it integrates 3.5 KB of program memory (2K x 14 words), 128 bytes of RAM, 33 digital I/O lines, and the classic PIC16C RISC core with only 35 single-word instructions to learn. The '04' suffix denotes a 4 MHz maximum clock, while the 'A' revision is an enhanced successor to the original PIC16C64 with improved electrical characteristics and a wider operating voltage range. A PIC microcontroller (Programmable Interface Controller) is a family of 8-, 16-, and 32-bit RISC-based microcontrollers originally developed by Microchip Technology. Within the PIC taxonomy, the PIC16C64A belongs to the mid-range (14-bit instruction word) PIC16C sub-family, which sits between the baseline PIC10/12/16 family and the high-performance PIC17C/PIC18C series. PIC MCUs are categorized as 8-bit microcontrollers (data path), Harvard architecture (separate program and data buses), and are widely used in embedded control due to their deterministic instruction timing, low cost, and ease of programming. Key features of the PIC16C64A-04/P include a fully static CMOS design, wide operating voltage range up to 6.0 V, and very low power consumption — typically 15 uA at 5 V / 4 MHz and as low as 1 uA at 3 V / 32 kHz, making it well suited for battery-backed applications. The device supports both commercial and industrial temperature ranges, includes an integrated Watchdog Timer with its own on-chip RC oscillator, and offers programmable code protection. Peripheral highlights include a Capture/Compare/PWM (CCP) module, a synchronous serial port (SSP) configurable for SPI or I2C, an 8-bit timer/counter (TMR0) with an 8-bit prescaler, a 16-bit timer/counter (TMR1), and an 8-bit timer/counter (TMR2) with period register. Architecturally, the PIC16C64A uses a 14-bit instruction word with a two-stage pipeline, providing single-cycle instruction execution except for program branches which take two cycles. Its Harvard architecture separates the program bus (14 bits wide) from the data bus (8 bits wide), enabling simultaneous instruction fetch and operand read. The Brown-out Reset (BOR) circuit holds the MCU in reset when VDD falls below a programmable threshold, protecting Flash/OTP integrity. An in-circuit debugger (ICD) is supported via the RB6/RB7 pins on most PIC16C6X parts. Typical applications include industrial control panels, automotive body electronics (non-safety), appliance control boards, security system panels, and low-end sensor hubs. The 33 I/O pins comfortably drive multiplexed LED displays, keypads, and relay drivers. When designing with the PIC16C64A-04/P, note that the OTP memory cannot be erased or rewritten — use the PIC16F64 or PIC16C65B flash-based equivalent for prototypes. Also ensure your programmer is set to the enhanced PIC16C6XA configuration; the legacy PIC16C64 settings will not program this device correctly. This page synthesizes distributor pricing, drop-in same-package alternatives from the PIC16C6X family, and practical design notes not found in the standalone manufacturer datasheet.

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PIC16C64A-04/PQ - 8-Bit 4MHz OTP MCU 3.5KB | Microchip
PIC16C64A-04/PQ

PIC16C64A-04/PQ - 8-Bit 4MHz OTP MCU 3.5KB | Microchip

The Microchip Technology PIC16C64A-04/PQ is an 8-bit CMOS RISC microcontroller from the PIC16C family, featuring 4 MHz operation, 3.5 KB (2K x 14) of one-time-programmable (OTP) program memory, 128 bytes of RAM, and 33 digital I/O pins, all housed in a 44-pin MQFP (10x10 mm) surface-mount package. Its RISC architecture executes 200 ns single-cycle instructions from only 35 single-word instructions, achieving high throughput at low clock rates, while integrated peripherals include Brown-out Detect/Reset, Power-On Reset (POR), Pulse-Width Modulation (PWM), and a Watchdog Timer (WDT). A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory (ROM/RAM), and programmable I/O peripherals on one die, enabling embedded control in applications ranging from washing machines to automotive ECUs. PIC microcontrollers, originally introduced by General Instrument and popularized by Microchip, sit within the broader taxonomy: microcontroller -> embedded controller -> semiconductor IC, and they specifically implement a Harvard RISC architecture with separate program and data buses. Key features of the PIC16C64A-04/PQ include 8-bit data width, 4 MHz maximum clock, 33 I/O pins across multiple ports, synchronous serial port (SSP) supporting SPI and I2C, parallel slave port, two 8-bit timer/counters and one 16-bit timer/counter, and a 14-bit instruction word. The OTP program memory (2K x 14 = 3.5 KB) is one-time programmable and not re-programmable in-circuit, making this part suitable for production runs where field firmware updates are not required. The 04 speed grade specifies a 4 MHz oscillator range, and the PQ suffix denotes the 44-pin Metric Quad Flat Pack (MQFP) package. The industrial/commercial operating temperature range typically covers 0C to +70C for the commercial grade (-04). Because this part is marked "Not Recommended for new designs" by Microchip and a newer version (PIC16C65B) is suggested as a replacement, long-term availability should be confirmed before new design-in. Typical applications include industrial control, appliance control, automotive subsystems (pre-AEC-Q100 era), low-end consumer electronics, and general-purpose embedded logic replacement. Designers should verify the specific OTP blank behavior, oscillator configuration (RC/HS/XT/LP), and programming specifications against the manufacturer datasheet before committing to production. When designing with this device, ensure the MCLR reset circuit, oscillator loading capacitors, and decoupling layout follow the datasheet reference design. Power-supply rise time and Brown-out Reset (BOR) trip points must be considered for reliable startup in noisy environments. Designers should plan ahead for end-of-life sourcing as Microchip has explicitly tagged this part as NRND. This page synthesizes distributor pricing, drop-in same-package alternatives from the PIC16C family, and practical design notes - information that is not assembled in the manufacturer datasheet alone.

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PIC16C64A-04/PT - 8-bit OTP MCU 4MHz 3.5KB TQFP-44 | Microchip
PIC16C64A-04/PT

PIC16C64A-04/PT - 8-bit OTP MCU 4MHz 3.5KB TQFP-44 | Microchip

The Microchip Technology PIC16C64A-04/PT is an 8-bit One-Time-Programmable (OTP) CMOS microcontroller from the PIC16C family, delivering 4 MHz CPU performance, 3.5 KB (2K x 14) of program memory, 128 bytes of RAM, and 33 digital I/O pins in a 44-pin TQFP surface-mount package. The "/PT" suffix designates the TQFP-44 package, while "-04" denotes the 4 MHz maximum oscillator frequency grade. According to the Microchip PIC16C64A datasheet, the device integrates a RISC instruction set, 14-bit wide instructions, an 8-level hardware stack, and a 20-year program retention window. An OTP microcontroller is a non-erasable, field-programmable MCU that retains firmware for the device lifetime after one programming pass. Within the broader taxonomy, the PIC16C64A sits in the 8-bit MCU -> microcontroller -> embedded controller -> semiconductor hierarchy. PIC16C devices use CMOS fabrication for low-power operation (typically < 2 mA active at 4 MHz, < 1 µA standby) and execute most instructions in a single 200 ns instruction cycle at 4 MHz, making them well-suited to deterministic real-time control. Key features include 33 I/O pins with individual direction control, a four-channel 8-bit analog-to-digital converter (ADC) with multiple reference options, three timer/counters (Timer0 with programmable prescaler, Timer1 16-bit, Timer2 with 8-bit period register), a synchronous serial port (SSP) supporting SPI and I2C master/slave, a parallel slave port for external bus expansion, and a watchdog timer with on-chip RC oscillator. The PIC16C64A also provides multiple oscillator modes including RC, XT, HS, and LP, plus an in-circuit serial programming (ICSP) interface for field updates before the OTP window closes. The architecture centers on a Harvard-style RISC CPU with separate program and data buses, a 14-bit program word, and a small instruction set that allows most operations to complete in one instruction cycle. Compared with earlier PIC16C6x parts, the "A" revision refined brown-out detect behavior and refined the ADC sampling path. The PIC16C64A is marked "Not Recommended for new designs" on the Microchip product page, with PIC16C65B cited as the newer version to consider. Typical applications include industrial control front-ends, appliance control boards, motor control signal conditioning, instrumentation sensor interfaces, and embedded control in legacy factory automation. The wide operating voltage range (typically 3.0 V to 6.0 V) and the 33 I/O pins support mixed analog/digital designs where the PIC16C64A acts as a glue controller between sensors, actuators, and a host MCU. When designing with this part, calculate worst-case active and sleep current from the datasheet curves, place decoupling capacitors as close as possible to VDD/VSS pins, and confirm that the chosen oscillator mode matches the external crystal or resonator. For new designs, evaluate the recommended successor (PIC16C65B family) before committing. This page consolidates datasheet specifications, distributor pricing, drop-in same-package alternatives, and practical design notes not assembled on the manufacturer datasheet alone.

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PIC16C64A-04E/PQ - 8-Bit 4MHz OTP MCU, 33 I/O, 44-MQFP | Microchip
PIC16C64A-04E/PQ

PIC16C64A-04E/PQ - 8-Bit 4MHz OTP MCU, 33 I/O, 44-MQFP | Microchip

The Microchip Technology PIC16C64A-04E/PQ is an 8-bit RISC CMOS one-time-programmable (OTP) microcontroller built on the PIC16C core, offering 4MHz maximum operating frequency, 3.5KB (2K x 14) of EPROM program memory, 128 x 8 bytes of RAM, and 33 digital I/O pins in a 44-pin Metric QFP (MQFP, 10x10 mm) package. According to the manufacturer product page, this device is part of the PIC16C6X family and is flagged "Not Recommended for new designs," with Microchip pointing to the PIC16C65B as the newer replacement for active designs and re-spins. An 8-bit OTP microcontroller (One-Time-Programmable Microcontroller) is a small, low-cost computer-on-a-chip that executes a fixed instruction set on 8-bit-wide data. In the embedded-systems taxonomy, it sits beneath general-purpose microcontrollers, above simple logic controllers, and within the broader class of microcontrollers -> MCUs -> semiconductors. OTP means the program memory can be written exactly once, after which the bit pattern is permanent; this makes OTP MCUs attractive for high-volume, cost-sensitive consumer and industrial products where firmware is stable and field re-programmability is not required. Key features of the PIC16C64A-04E/PQ include a 14-bit wide instruction word, 35 single-word instructions, 200ns instruction execution at 4MHz (5V), an 8-level hardware stack, and integrated peripherals such as Brown-out Detect/Reset, Power-on Reset (POR), Pulse-Width Modulation (PWM), and a Watchdog Timer (WDT). Serial connectivity is supported through I2C and SPI ports. The PIC16C core's RISC architecture with a single-cycle instruction fetch keeps deterministic timing simple for real-time control loops. Architecturally, the device is fully static CMOS, allowing the clock to be slowed to DC for low-power standby, and supports a 4V to 6V operating voltage range. The 33 I/O pins are grouped into ports for easy interfacing with switches, LEDs, keypads, and small sensor arrays; PWM and WDT are integrated to remove external timing components. Typical applications include appliance control, HVAC user-interface panels, simple sensor front-ends, automotive body controllers (predecessor generation), industrial operator panels, and white-goods motor control. The compact 44-MQFP footprint also makes it suitable for retrofit and form-factor-constrained boards where the PIC16 ecosystem is already deployed. When designing with this part, evaluate the supply-rail decoupling strategy (0.1 uF ceramic at VDD/VSS pairs), confirm the I/O sink/source budget against the load, and verify the oscillator configuration matches the in-circuit crystal or resonator. For new designs, prefer the recommended successor PIC16C65B or current-generation PIC16F1xxx Flash MCUs to avoid lifetime-buy pressure on this OTP device. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes that are not available in the bare manufacturer datasheet, giving procurement and engineering teams a single source of truth for lifecycle, fit, and risk assessment.

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PIC16C64A-04E/PT - 8-Bit OTP MCU, 3.5KB EPROM, 4MHz, TQFP-44 | Microchip
PIC16C64A-04E/PT

PIC16C64A-04E/PT - 8-Bit OTP MCU, 3.5KB EPROM, 4MHz, TQFP-44 | Microchip

The Microchip Technology PIC16C64A-04E/PT is an 8-bit RISC CMOS microcontroller based on the PIC16 mid-range architecture, offering 3.5KB (2K x 14) of one-time-programmable (OTP) program memory and 128 bytes of RAM in a 44-pin TQFP (10x10mm) package. It executes most instructions in a single 200 ns cycle at 4 MHz, providing 5 MIPS throughput, and integrates 33 digital I/O lines grouped into five ports (PORTA-PORTE) with programmable direction registers. An 8-bit PIC microcontroller is a Harvard-architecture, RISC-based CMOS device in which program and data memories use separate buses. This separation allows instruction fetch and operand read to occur in the same cycle, giving PIC MCUs their characteristic deterministic execution time. Within the broader taxonomy, the PIC16C64A belongs to the PIC16 family of mid-range microcontrollers, which sits between the baseline PIC10/12/16 families and the high-end PIC18 family, and ultimately under the umbrella of embedded microcontrollers -> microcontrollers -> integrated circuits. The OTP (one-time-programmable) program memory uses EPROM cells, distinct from the flash-based PIC16F series. Key specifications include an external oscillator interface supporting up 4 MHz (4 in the suffix indicates the maximum frequency), an operating voltage range of typically 2.5 V to 6.0 V, and a brown-out reset / power-on reset subsystem. The device integrates a Synchronous Serial Port (SSP) supporting SPI and I²C master/slave modes, a USART for asynchronous serial communication, and three hardware timers (Timer0, Timer1, Timer2) suitable for event counting, input capture, output compare, and PWM generation. Peripherals include a 5-channel 8-bit ADC and a watchdog timer with its own on-chip RC oscillator. The PIC16C64A-04E/PT is well suited to embedded control applications that demand deterministic interrupt latency, simple peripheral set, and legacy code reuse. Typical use cases include industrial control logic, sensor interfacing, motor drive sequencing, and brown-field designs maintaining compatibility with the classic PIC16 mid-range instruction set. A key design consideration when using the PIC16C64A-04E/PT is OTP program memory: once programmed, the device cannot be re-programmed. Engineers should use a windowed (JW) sample for prototype iteration and reserve the OTP -04E/PT for production. The 'E' suffix denotes the industrial temperature grade (-40°C to +125°C). Microchip recommends migrating to PIC16F877A for new designs, as the PIC16C64A has been replaced by PIC16C65B per the manufacturer product page. This page synthesizes drop-in replacement alternatives, parametric comparison data, and application context not aggregated in any single manufacturer or distributor source.

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PIC16C64A-04I/L - 4MHz 8-Bit OTP MCU 3.5KB | Microchip PLCC-44
PIC16C64A-04I/L

PIC16C64A-04I/L - 4MHz 8-Bit OTP MCU 3.5KB | Microchip PLCC-44

The Microchip Technology PIC16C64A-04I/L is an 8-bit CMOS microcontroller in the PIC16C family, featuring 3.5KB (2K x 14) of One-Time-Programmable (OTP) program memory, 128 bytes of RAM, and 33 digital I/O pins in a 44-pin PLCC package (16.59 x 16.59 mm). The device operates at 4 MHz and supports a supply voltage of 4V to 5.5V over the industrial temperature range of -40C to +85C. What is an 8-bit microcontroller? An 8-bit microcontroller is a single-chip computer that integrates a CPU, program memory (ROM/EPROM/Flash/OTP), data RAM, and peripheral interfaces on one die. The PIC16C family from Microchip uses a RISC (Reduced Instruction Set Computer) architecture with 35 single-word instructions, where all instructions execute in one instruction cycle except program branches (two cycles). The PIC16C64A sits in the hierarchy: 8-bit MCU -> PIC16C family -> PIC16C6X sub-family -> peripheral-rich members with parallel ports and capture/compare/PWM. Key features of the PIC16C64A-04I/L include 33 I/O pins, a 4 MHz maximum clock, three timer/counter modules, a synchronous serial port (SSP) supporting SPI and I2C, a USART for asynchronous serial communication, a capture/compare/PWM (CCP) module, and an 8-bit ADC with up to 8 channels. The wide operating voltage range and low power consumption (typically 15 uA at 5V/4 MHz and 1 uA at 3V/32 kHz) make it suitable for battery-powered and industrial applications. The PIC16C64A uses CMOS EPROM/ROM technology with a fully static design, allowing the clock to be stopped without losing register state. The Harvard architecture separates program and data buses, enabling instruction fetch and operand access in a single cycle. The 8-level hardware stack and interrupt controller handle nested subroutine calls and real-time events. Typical applications include industrial control systems, automotive body electronics, sensor signal conditioning, simple motor control via PWM, smart sensor nodes, and embedded data acquisition. The PIC16C64A is well suited to applications needing moderate I/O count, integrated analog, and reliable serial communication in a through-hole-friendly PLCC package. When designing with this part, note that OTP memory can be programmed only once; for engineering development, use the windowed CERDIP variant. The PLCC-44 package supports both socketed and surface-mount assembly, useful for legacy systems that require field-replaceable MCUs. This page synthesizes distributor pricing, drop-in alternatives within the PIC16C6X family, and practical design notes drawn from the manufacturer datasheet and Octopart cross-references.

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