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PIC16C622A-04I/P

PIC16C622A-04I/P - 8-bit 4MHz OTP MCU 3.5KB | Microchip

The Microchip Technology PIC16C622A-04I/P is an EPROM-based 8-bit CMOS microcontroller with 4 MHz maximum clock input, 3.5 KB (2K x 14) OTP program memory, and 128 bytes of RAM, housed in a 18-pin PDIP through-hole package. It integrates 13 I/O pins, one 8-bit timer/counter, and a capture/compare/PWM (CCP) module plus a USART, making it well suited to legacy embedded control applications. The '-04' speed suffix denotes a 4 MHz oscillator maximum, while the 'I' temperature grade specifies an industrial -40C to +85C operating range. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory (ROM/EPROM/Flash), data memory (RAM), and peripheral I/O on one die. The PIC16C62x family belongs to Microchip's mid-range PIC16 architecture, sitting hierarchically between baseline PIC10/12/14 devices and enhanced PIC17/18 families. Compared with 32-bit Cortex-M cores, 8-bit MCUs trade raw performance for deterministic interrupt latency, low power, smaller code footprint, and BOM cost. Key features of the PIC16C622A include 35 single-word instructions (200 ns instruction cycle, two-cycle branches), an 8-level deep hardware stack, in-circuit serial programming (ICSP) capability, a watchdog timer with on-chip RC oscillator, power-on reset, brown-out reset, and an internal/external interrupt source. The 13 I/O pins can source/sink 25 mA each, sufficient to drive LEDs, small relays, and optocouplers directly. Technically, the device uses a RISC Harvard architecture with separate program and data buses to allow instruction fetch and operand read in one cycle. The 14-bit instruction word enables direct, immediate, and relative addressing. Two 8-bit timer/counters (TMR0, TMR2) plus one 16-bit timer/counter (TMR1) are available on some family variants; on the PIC16C622A itself TMR0 is the primary counter. Typical applications include industrial control panels, automotive body electronics (non-safety), appliance controls, security sensor interfaces, and remote keyless entry receivers. Its OTP program memory makes it best suited for production designs where firmware is stable and not field-upgradable. When designing with this part, note that OTP memory cannot be reprogrammed - engineering samples use the windowed JW package, and firmware changes after volume commitment require a new mask. For new designs, the flash-based PIC16F628A is usually recommended as the modern equivalent. This page synthesizes distributor pricing, pin-compatible alternatives, and engineering trade-offs not found in the standalone manufacturer datasheet.

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PIC16C622A-04I/SO

PIC16C622A-04I/SO - 8-Bit 4MHz OTP MCU 18-SOIC | Microchip

The Microchip Technology PIC16C622A-04I/SO is an 8-bit EPROM/OTP-based CMOS microcontroller in the PIC16C family, running up to 4 MHz with a 1 µs instruction cycle in an 18-pin SOIC package. The device integrates 3.5 KB (2K x 14) of One-Time-Programmable program memory, 128 bytes of RAM, and 13 digital I/O pins, providing a compact 8-bit solution for cost-sensitive embedded designs. The 'A' revision enhances the original PIC16C622 with extended instruction set support and improved oscillator options while maintaining full backward compatibility with the PIC16C62x series pinout. A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory, and programmable I/O peripherals. The PIC16C622A belongs to the mid-range 8-bit PICmicro family, sitting within Microchip's broader taxonomy of 8-bit microcontrollers -> microcontrollers -> embedded processors -> integrated circuits. Its RISC-style Harvard architecture with 35 single-cycle instructions simplifies firmware development while delivering deterministic real-time behavior suitable for low-power control loops. Key features include an operating voltage range of 2.5 V to 5.5 V (industrial temperature -40 °C to +85 °C as denoted by the 'I' suffix), two 8-bit timers plus one 16-bit timer/counter with capture/compare/PWM capability, a USART/SCI serial port, an analog comparator, and a watchdog timer with on-chip RC oscillator for reliable operation. The PIC16C622A also provides a 4 MHz internal-execution rate from an external 4 MHz crystal, an 8-bit parallel slave port, and up to 13 bidirectional I/O pins with high-current sink/source capability. Architecturally, the device uses a 14-bit wide program word with separate program and data buses (Harvard architecture), enabling simultaneous instruction fetch and data access. The 4 MHz oscillator combined with a 4:1 instruction-pipeline divider delivers a 1 µs single-cycle instruction time (200 ns cycle at 20 MHz), while the on-chip Power-on Reset, Brown-out Reset, and Watchdog Timer provide robust field-deployment reliability. Typical applications include consumer appliance control, security system panels, automotive body modules, industrial sensor interfaces, low-cost remote controls, and small-form-factor motor-driver front-ends. The wide operating voltage and industrial temperature range also suit battery-powered instrumentation and HVAC peripheral controllers. When designing with this part, note that OTP memory cannot be re-programmed in-circuit; for development or low-volume production, choose a Flash-based equivalent such as PIC16F627A or PIC16F628A in the same 18-pin SOIC footprint to reuse PCB layout and firmware libraries. This page synthesizes distributor stock and pricing, drop-in same-package alternatives from Microchip's PIC16C family, and practical design notes beyond the manufacturer datasheet - supporting faster sourcing decisions for engineering and procurement teams.

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PIC16C622A-04I/SS

PIC16C622A-04I/SS - 8-Bit OTP MCU, 4MHz, 3.5KB | Microchip

The Microchip PIC16C622A-04I/SS is a CMOS OTP-based 8-bit microcontroller from the PIC16C family, executing instructions in 200 ns at 4 MHz and packaged in a 20-pin SSOP (0.209 inch / 5.30 mm body width). It integrates 3.5 KB of one-time-programmable program memory (2K x 14), 128 bytes of RAM, 13 digital I/O lines, two analog comparators, an 8-bit timer/counter (TMR0), and a watchdog timer with its own on-chip RC oscillator. An 8-bit microcontroller is a single-chip computer that processes data 8 bits at a time and integrates CPU, memory, and peripherals on one die. PIC microcontrollers use a RISC (Reduced Instruction Set Computer) architecture with a small, fixed instruction set (35 single-word instructions for the PIC16C6xx family), which simplifies decoding and lets the device execute most instructions in a single instruction cycle. The PIC16C622A belongs to the mid-range PIC family - positioned between base-line PIC10/12/16 devices and the PIC17/PIC18 high-end family - and is widely used in cost-sensitive embedded control where ROMless or OTP flexibility is acceptable. Key features include a wide 3.0 V to 6.0 V operating range, low-power CMOS design, programmable code protection, an in-circuit serial programming (ICSP) interface via RB6/RB7, and two on-chip comparators that can be used as a voltage reference or for analog signal conditioning. The '04' speed grade marks 4 MHz operation; the 'I' suffix denotes the industrial temperature grade (-40 C to +85 C); the '/SS' suffix denotes the 20-pin SSOP package. Typical applications include appliance control, sensor interfaces, consumer electronics, battery chargers, simple motor control loops, and low-cost replacement of discrete logic. The internal comparators make the part especially attractive for power-supply monitoring, battery-level detection, and threshold-detection circuits. The 13 I/O pins can directly drive LEDs, keypads, or low-side transistors. Designers should pay attention to OTP programming - once programmed, the part cannot be electrically erased, so development is normally done with a windowed (JW) or flash equivalent (PIC16F622) before committing to the OTP version. The SSOP package requires standard surface-mount reflow; pad design follows JEDEC MS-150 guidelines. Brown-out detection is internal but not user-configurable, and the device has no on-chip hardware UART (asynchronous serial) - any serial bit-banging must be done in firmware on the I/O pins. This page synthesizes distributor pricing, OTP programming considerations, and practical application notes not found in the bare datasheet.

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PIC16C622A-20/SO

PIC16C622A-20/SO - 8-Bit 20MHz OTP MCU 3.5KB | Microchip

The Microchip Technology PIC16C622A-20/SO is an EPROM/OTP-based 8-bit CMOS microcontroller from the PICmicro mid-range family, executing one instruction in 200ns at the 20MHz maximum clock rate. It integrates 3.5KB (2K x 14) of one-time-programmable program memory, 128 bytes of RAM, and 13 digital I/O pins in an 18-pin wide-body SOIC package. The device operates from a single 2.5V to 5.5V supply, making it equally suited to 3.3V and 5V logic designs, and is specified over the commercial 0C to +70C temperature range. What is a PIC16C62X microcontroller? It is a member of Microchip's mid-range PIC family built on a RISC (Reduced Instruction Set Computer) Harvard architecture that uses separate program and data buses. The PIC16C62X series pairs a 14-bit wide instruction word with an 8-bit data path, providing higher code density than the entry-level 12-bit PIC cores while keeping the instruction set small (only 35 single-word instructions to learn). Positioned in the hierarchy as microcontroller -> embedded MCU -> 8-bit MCU -> PIC micro -> semiconductor, the PIC16C62X family is widely used in appliance controls, security panels, automotive body electronics, IR remote controls, and low-cost consumer products. Key features of the PIC16C622A include two on-chip analog comparators (the defining trait that distinguishes the 'C62X family from generic PIC16C55x/56x/57x parts), a watchdog timer with on-chip RC oscillator, power-on reset, brown-out reset, an internal 4MHz RC oscillator option to reduce external component count, and a programmable code-protection scheme. The OTP EPROM is written with an external device programmer such as the Microchip MPLAB PM3, and the part supports in-circuit serial programming (ICSP) on most I/O pins via dedicated programming lines. Typical applications include security alarm panels, appliance controllers, sensor signal conditioning, IR remote receivers, automotive interior lighting and accessory modules (non-safety), and small motor-driver interfaces. The integrated comparators allow direct analog-sensor interface (light, temperature, current) without a separate op-amp, lowering BOM cost in volume production. When designing with the PIC16C622A-20/SO, note that the OTP variant cannot be reprogrammed in-circuit; for development, use the JW windowed or QFP UV-erasable package. Place a 0.1uF decoupling capacitor as close to the VDD/VSS pins as possible and follow Microchip's recommended PCB layout for the chosen oscillator to avoid start-up problems and erratic resets. This page synthesizes distributor pricing (as of 2026-10-09), Microchip same-family drop-in alternatives, and practical design notes not assembled in the manufacturer datasheet alone.

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PIC16C622A-20E/P

PIC16C622A-20E/P - 3.5KB OTP 8-bit MCU, 18-DIP | Microchip

The Microchip Technology PIC16C622A-20E/P is an EPROM-based 8-bit CMOS microcontroller from the PIC® 16C family, delivering 3.5KB (2K x 14) of one-time-programmable (OTP) program memory, 128 bytes of RAM, and 13 I/O pins in a through-hole 18-pin DIP package. It operates up to 20 MHz from a 5V supply and is rated for the extended automotive temperature grade. The part suffix "-20E" denotes 20 MHz maximum clock and the "E" industrial/automotive temperature grade (-40C to +125C), with the "/P" package code identifying the 0.300-inch-wide PDIP-18 plastic DIP. A PIC (Peripheral Interface Controller) microcontroller is a Harvard-architecture RISC processor with separate program and data buses, optimized for deterministic real-time embedded control. The PIC16C622A belongs to the mid-range PIC14-instruction family, uses a 14-bit instruction word, and integrates analog peripherals including a comparator module and a capture/compare/PWM (CCP) block that simplifies closed-loop control. In the wider taxonomy it sits as: PIC16C622A -> PIC16C62x family -> PIC16 mid-range -> PICmicro 8-bit MCU -> embedded microcontroller -> semiconductor. The OTP EPROM cell enables fast prototype-to-production migration for cost-sensitive and automotive applications. Key features include 3.5KB OTP program memory, 128 bytes of data RAM, 13 digital I/O pins, an integrated analog comparator, a 16-bit timer/counter with capture/compare/PWM, an 8-bit timer/counter, a 5-channel 8-bit ADC, and a watchdog timer with its own on-chip RC oscillator. Power-managed Sleep mode and a hardware Universal Synchronous/Asynchronous Receiver/Transmitter (USART/SCI) round out the peripheral set. Compared with the earlier PIC16C622, the "A" silicon revision improves brown-out behaviour and ESD robustness. Architecturally the device uses a 14-bit instruction word, two-cycle instruction execution for branches and a four-cycle oscillator start-up from Power-on Reset. Its low-power CMOS design draws only microampere-level Sleep currents while preserving full register retention, making it a strong fit for battery-backed and automotive applications where quiescent draw matters. Typical applications include automotive body controllers and instrument clusters, HVAC fan control, appliance user-interface panels, low-end security keypads, and remote sensor transmitter nodes. The wide -40C to +125C automotive temperature range makes it particularly well-suited to under-hood and dashboard electronics that must survive harsh thermal environments. When designing with the PIC16C622A-20E/P, place a 100 nF decoupling capacitor within 5 mm of VDD and reserve the ICSP programming footprint even on production boards - OTP parts must be programmed once, and in-system programming access greatly simplifies rework. Be aware that OTP cannot be erased, so design firmware carefully before committing to volume programming.

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PIC16C622A-20E/SO

PIC16C622A-20E/SO - 8-Bit 20MHz 3.5KB OTP MCU 18-SOIC | Microchip

The Microchip Technology PIC16C622A-20E/SO is a CMOS OTP-based 8-bit microcontroller from the PIC16C family, delivering 20 MHz maximum operating frequency with 3.5 KB (2K x 14) of One-Time-Programmable program memory and 128 bytes of RAM in an 18-pin SOIC (0.295 inch / 7.50 mm body width) package. The -20E speed grade specifies a 20 MHz clock with the Extended industrial temperature range (-40C to +125C), and the /SO suffix denotes the wide-body SOIC-18 surface-mount package. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, memory (ROM/RAM), timers, I/O peripherals, and interrupt logic on one die. The PIC16C family uses a RISC (Reduced Instruction Set Computer) architecture with only 35 single-word instructions, allowing most instructions to execute in a single 200 ns instruction cycle at 20 MHz. MCUs belong to the broader category of microcontrollers -> embedded processors -> semiconductors, and serve as the central control element in countless embedded systems. Key features of the PIC16C622A include 13 digital I/O pins, an integrated analog comparator module, two 8-bit timers (Timer0, Timer2) and one 16-bit timer (Timer1), a Watchdog Timer with its own on-chip RC oscillator, an 8-bit parallel slave port, and an internal/external interrupt structure. The device operates from 2.5 V to 5.5 V and supports in-circuit serial programming (ICSP) via its RB6/RB7 pins. The PIC16C622A uses a Harvard architecture with separate program and data buses, an accumulator-based ALU, and a hardware stack 8 levels deep. Its CMOS process yields very low power consumption (typical < 2 mA at 5 V, 4 MHz), and the SLEEP power-down mode reduces quiescent current to the microampere range, making it suitable for battery-backed or energy-conscious designs. Typical applications include appliance controls, automotive body electronics (non-safety), sensor signal conditioning, LED driving, motor control PWM, low-end remote controls, and industrial metering. The integrated analog comparator is particularly useful for zero-crossing detection, battery voltage monitoring, and sensor threshold detection. When designing with this part, note that OTP memory can be programmed only once; engineers must commit the firmware before final assembly. Use sockets or adapt the design to a Flash equivalent (PIC16F62x family) for prototyping. Decouple VDD/VSS with a 100 nF ceramic capacitor placed within 5 mm of the package pins, and reserve RB6/RB7 for ICSP to keep in-field firmware updates possible during development. This page synthesizes distributor pricing across DigiKey, Mouser, LCSC and Hotenda, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet alone.

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PIC16C622A-20E/SS

PIC16C622A-20E/SS - 3.5KB OTP 8-Bit MCU 20MHz | Microchip

The Microchip Technology PIC16C622A-20E/SS is an EPROM-based 8-bit CMOS microcontroller from the PIC16C family with 3.5KB (2K x 14) of one-time-programmable (OTP) program memory, 128 bytes of RAM, and 13 digital I/O pins. The device operates at a maximum clock speed of 20 MHz across a 2.5 V to 5.5 V supply range and is housed in a 20-pin SSOP package (5.30 mm body width, 0.209 inch) with an industrial -40C to +125C operating temperature range. The 'E' suffix denotes the extended industrial temperature grade, while 'SS' denotes the 0.209" SSOP package option. 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. OTP microcontrollers ship with one-time-programmable EPROM for code storage and are intended for low-to-medium volume production or evaluation where re-programmability is not required. Within the broader semiconductor hierarchy, MCUs sit under microcontrollers, embedded processors, and semiconductors, and serve as the compute core for billions of low-power edge and consumer devices. The PIC16C622A is part of Microchip's mid-range PIC16C family, originally introduced in the 1990s and still used for long-lifecycle industrial and legacy designs. Key features include a RISC architecture with 35 single-cycle instructions, an internal oscillator option, two analog comparators with programmable reference, a watchdog timer, and power-on reset. The PIC16C622A delivers deterministic single-cycle instruction execution and Harvard architecture separation of program and data buses for predictable interrupt latency, which simplifies real-time control firmware. Technical depth: the PIC16C622A uses a Harvard architecture with separate 14-bit program and 8-bit data paths, supported by a 2-level hardware stack and 8-level deep software stack. The integrated comparators can be configured for analog signal conditioning, while the 13 I/O pins source or sink up to 25 mA per pin, enabling direct LED drive without external transistors. Typical applications include industrial control, appliance control, security and access panels, simple sensor interfaces, and automotive body electronics where extended-temperature operation is required. Design tip: because the PIC16C622A is OTP and not re-programmable in-circuit, plan your firmware revision strategy carefully. Use a windowed (JW) or Flash-based PIC16F variant during development and migrate to PIC16C622A only for locked production firmware. This page synthesizes real distributor pricing, drop-in alternatives, and practical design notes for the PIC16C622A-20E/SS not found in the manufacturer datasheet alone.

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PIC16C622A-20I/P

PIC16C622A-20I/P - 8-Bit 20MHz 3.5KB OTP MCU 18-PDIP | Microchip

The Microchip Technology PIC16C622A-20I/P is an EPROM-based 8-bit CMOS RISC microcontroller belonging to the PICmicro mid-range family, operating at up to 20 MHz clock input with a 200 ns instruction cycle. It integrates 3.5 KB (2K x 14 words) of one-time-programmable (OTP) program memory, 128 bytes of RAM, and 13 digital I/O lines, all housed in an 18-pin PDIP (Plastic DIP) through-hole package. The -20I/P suffix denotes 20 MHz maximum frequency, industrial temperature grade (-40C to +85C), and PDIP packaging. An MCU (microcontroller) is a single-chip computer containing a CPU core, program memory, data memory, and programmable I/O peripherals. The PIC16C62X family falls within the 8-bit PIC RISC architecture hierarchy: 8-bit MCU -> PIC RISC -> PIC16C mid-range -> PIC16C62X sub-family -> peripheral-rich EPROM/OTP devices. Within Microchip's portfolio, OTP EPROM parts bridge early-development ROM-based designs and field-programmable Flash parts, providing fixed-program memory at lower cost than windowed EPROM. Key features include only 35 single-cycle instructions to learn, 200 ns instruction execution (except two-cycle branches), 13 I/O pins with individual direction control, a watchdog timer, a 16-bit timer/counter with 8-bit prescaler, and an 8-bit A/D converter channel set. The -I industrial temperature grade makes this part suitable for factory-floor and outdoor enclosures, while the -20 speed grade supports deterministic control loops at kHz-to-MHz rates. The OTP memory architecture means firmware is permanently written during production programming. The PIC16C622A uses a Harvard architecture with separate program and data buses, allowing instruction fetch and operand access in the same cycle. The 14-bit instruction word and 8-bit data path are characteristic of PIC mid-range cores, providing higher code density than 8-bit CISC architectures for byte-oriented control code. Industrial peripherals such as capture/compare/PWM (CCP) and USART are not present on this specific variant, keeping the die compact for cost-sensitive applications. Typical applications include appliance control, sensor signal conditioning, low-end user interfaces, LED driving, small motor control, and white-goods timing. The 18-pin PDIP form factor suits breadboard prototyping, legacy through-hole assemblies, and educational/training kits where socketed replacement aids debugging. When designing, note that OTP memory cannot be reprogrammed, so firmware verification before programming is critical. Industrial -I temperature grade allows operation from -40C to +85C; for extended -40C to +125C operation choose a -E grade variant or a Flash-based PIC16F equivalent. This page consolidates distributor stock, drop-in replacements, and design guidance that the manufacturer datasheet alone does not present.

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PIC16C622A-20I/SO

PIC16C622A-20I/SO - 8-Bit 20MHz OTP MCU 3.5KB | Microchip

The Microchip Technology PIC16C622A-20I/SO is an 8-bit CMOS RISC microcontroller from the PIC16C family, featuring 3.5KB (2K x 14) of One-Time Programmable (OTP) program memory, 128 bytes of RAM, and 13 I/O pins, operating at up to 20 MHz clock input with a 200 ns instruction cycle, all housed in an 18-pin SOIC package rated for the industrial -40C to +85C temperature range. The device delivers 35 single-cycle instructions (200 ns each), with only program branches being two-cycle (400 ns), enabling efficient deterministic control loops in embedded designs. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory (ROM/Flash/OTP), volatile data memory (RAM), and programmable peripheral I/O on one die, designed to execute firmware that interacts with sensors, actuators, and communication buses in real time. Within the broader semiconductor taxonomy, MCUs sit under microcontrollers -> microprocessors -> logic ICs -> integrated circuits (ICs). The PIC16C mid-range family uses a Harvard RISC architecture with a 14-bit instruction word optimized for compact code density, distinguishing it from the PIC16F flash family and the PIC18 advanced family. Key features of the PIC16C622A include a wide 2.5V to 5.5V operating voltage range (enabling both 3.3V and 5V systems), two analog comparators, internal oscillator option, and 128 bytes of data RAM. The 8-bit timer/counter, watchdog timer, and programmable code protection support robust fault-tolerant firmware. Industrial temperature grade and 1000 erase/write cycle endurance on OTP (limited; see datasheet) align with high-reliability embedded requirements. The SOIC-18 package is a surface-mount variant with 0.300 inch body width for industrial PCB assembly. This device uses CMOS EPROM-based technology with a 14-bit instruction word and an 8-bit data path, consuming under 2 mA typical at 5V/4 MHz. The PIC16C622A operates at 20 MHz with a 200 ns instruction cycle, which determines throughput for tight control loops. The integrated analog comparators enable direct interface to analog signals without external op-amps, saving board area. A programmable code-protection bit prevents unauthorized firmware read-back, an important security feature for commercial deployments. Typical applications include appliance control (washing machines, microwave ovens), industrial sensor interfaces, automotive body electronics (non-safety), battery chargers, and remote-control transmitters. Industrial automation subsystems such as motor speed controllers, HVAC damper actuators, and security keypads also benefit from this MCU. The industrial temperature grade supports outdoor and factory-floor deployments. Compared to PIC16F flash parts, OTP devices are lower cost in volume and well-suited to mature, fully-debugged firmware where in-field reprogramming is not required. When designing with PIC16C622A, note that OTP memory cannot be reprogrammed - firmware must be 100% validated or you will scrap parts. Use the ICSP (In-Circuit Serial Programming) interface or MPLAB PM3 device programmer for prototype bring-up. A decoupling capacitor of 0.1 uF placed close to VDD is mandatory, with additional bulk capacitance recommended near the voltage regulator. Programming voltage (VPP) of approximately 13V is required for OTP programming; verify the programming socket or ICSP header matches the Microchip reference design. This page synthesizes distributor pricing tiers, drop-in alternatives from the same PIC16C mid-range family, and practical design notes not collected in a single datasheet section, giving the engineer a decision-ready reference.

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PIC16C622A-40/P

PIC16C622A-40/P - 8-Bit EPROM MCU, 3.5KB, 40MHz, PDIP-18

The Microchip Technology PIC16C622A-40/P is an 8-bit CMOS EPROM/ROM-based microcontroller from the PICmicro mid-range family, offering 3.5KB of program memory, 128 bytes of RAM, and 40MHz maximum clock speed in a 18-pin PDIP (Through-Hole) package. It operates from a 2.5V to 5.5V supply (3.3V/5V nominal), integrates a precision analog comparator, and is built on a fully-static RISC architecture with only 35 single-word instructions to learn. The PIC16C622A is part of the PIC16C62X family of 18 and 20-pin ROM/EPROM-based microcontrollers. An EPROM-based MCU (Erasable Programmable Read-Only Memory microcontroller) is a member of the broader 8-bit microcontroller category and sits inside the larger hierarchy of microcontrollers -> embedded microcontrollers -> microprocessors -> semiconductors. EPROM-based parts are one-time or window-erasable and are typically used for prototype development and low-volume production where Flash-based devices are not yet validated. Key features include 13 I/O pins with individual direction control, one 8-bit timer (TMR0) with an 8-bit prescaler, a Watchdog Timer with its own on-chip RC oscillator for reliable recovery, Power-on Reset, Power-up Timer, and Oscillator Start-up Timer. The integrated analog comparator supports up to four input channels via the AN0-AN3 pins, enabling direct interface with analog sensors without an external op-amp. The CMOS process provides low power consumption, with a typical supply current of only a few milliamps at full clock. Architecturally, the PIC16C622A uses a Harvard-style RISC core with a 14-bit instruction word and an 8-bit data path. The 35-instruction set, all single-cycle except branches, simplifies coding and timing analysis. The device supports external crystal, ceramic resonator, or RC oscillator configurations, plus a low-power LP oscillator option for battery-powered designs. The EPROM cell enables window-erasable prototype iteration when the JW package variant is used. Typical applications include appliance control, automotive body electronics, industrial sensor interfaces, low-cost remote controls, and consumer white goods where the integrated comparator simplifies analog front-end design. Compared with mask-ROM siblings, the EPROM variant is preferred for engineering samples and pre-production runs. Designers should note that the PIC16C622A is OTP (One-Time Programmable) in the plastic PDIP package and is not re-programmable in-circuit; verify firmware carefully before programming. The 40MHz speed grade requires a 10MHz input clock at the maximum 4:1 PLL-less oscillator configuration. This page synthesizes distributor stock and pricing, drop-in EPROM/Flash equivalents in the same PDIP-18 footprint, and practical design notes not found in the manufacturer datasheet alone.

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PIC16C622A-40/SS

PIC16C622A-40/SS - 8-Bit CMOS OTP MCU, 3.5KB, 40MHz | Microchip

The Microchip Technology PIC16C622A-40/SS is an 8-bit RISC CMOS microcontroller with 3.5KB (2048 words) of One-Time Programmable (OTP) program memory, 128 bytes of RAM, and 13 general-purpose I/O pins, housed in a 20-pin SSOP package. The device operates from 2.5V to 5.5V and supports a maximum clock frequency of 40MHz, delivering 100 ns instruction execution across 35 single-word instructions. A microcontroller (MCU) is a single-chip computer containing a CPU core, non-volatile program memory, working RAM, and integrated peripherals such as comparators, timers, and I/O ports. The PIC16C622A belongs to the mid-range PICmicro family and uses a Harvard architecture with separate program and data buses, providing deterministic instruction timing that simplifies real-time control design. OTP MCUs sit in the product hierarchy as: PIC16C62x series -> mid-range PICmicro -> 8-bit PIC MCU -> microcontroller -> semiconductor. Key features of the PIC16C622A include two on-chip analog comparators with programmable reference voltage, a 16-bit timer/counter (TMR1), an 8-bit timer/counter (TMR0) with programmable prescaler, a Watchdog Timer with its own on-chip RC oscillator, and Power-on Reset / Brown-out Reset circuitry. The two comparators enable direct interface with analog signals without an external op-amp, making the part well-suited to sensor-conditioning and threshold-detection front ends. Architecturally, the PIC16C622A implements a 14-bit instruction word and a separate 8-bit data path. The OTP program memory is programmed once and cannot be erased, so this part is intended for volume production rather than prototyping (where Flash-based PIC16F equivalents are preferred). The SSOP-20 footprint also supports industrial temperature operation (-40C to +85C) under the -40 speed grade suffix used here. Typical applications include consumer appliance control, IR remote receivers, battery chargers, smoke detectors, and simple sensor interface modules. The 13 I/O pins and two comparators allow direct connection to a PIR sensor, thermistor, or photocell without external glue logic. When designing with the PIC16C622A, ensure your programmer supports the OTP variant (MPLAB PM3 or equivalent) and that the supply decoupling network uses a 100 nF ceramic capacitor placed within 5 mm of VDD. The two comparator outputs can be routed to an interrupt-on-change pin for low-power wake-up duty cycles. This page synthesizes distributor pricing, parametric alternatives, and pin-compatible OTP substitutes not consolidated on any single manufacturer page, including a direct side-by-side with the Flash-based PIC16F equivalents that simplify prototyping.

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PIC16C622A/JW

PIC16C622A/JW - 8-bit 20MHz 3.5KB EPROM MCU | Microchip

The Microchip Technology PIC16C622A/JW is an 8-bit CMOS RISC microcontroller from the PIC® 16C family, delivering 20 MHz core performance with 200 ns single-cycle instruction execution in an 18-pin CERDIP windowed package. It integrates 3.5 KB (2K x 14) of One-Time-Programmable (OTP) EPROM program memory, 128 bytes of RAM, and 13 digital I/O lines, making it a compact workhorse for legacy embedded control designs. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, working RAM, and peripheral I/O on one die. The PIC architecture pioneered Harvard memory separation and RISC instruction sets, with the PIC16C series introducing one-time-programmable (OTP) EPROM for code storage and an instruction set reduced to 35 single-cycle opcodes. The PIC16C622A/JW belongs to the PIC16C62X sub-family that adds a 16-bit timer/counter, an 8-bit timer, and a capture/compare/PWM (CCP) module, positioning it between basic PIC16C5X parts and the more advanced PIC16C7X series. Key features include an operating frequency up to 20 MHz, instruction-cycle time of 200 ns, an 8-bit ADC-free analog comparator, a synchronous serial port (SSP), and a programmable code protection scheme. Power consumption is typically below 2 mA at 5V/4 MHz and falls below 1 µA in sleep mode, supporting battery-aware applications. The /JW suffix indicates a windowed CERDIP package that allows UV erasure for prototype development and code iteration. Architecturally, the device uses a 14-bit instruction word with an 8-bit data path, eight-level hardware stack, and direct/indirect addressing modes. Watchdog timer with on-chip RC oscillator, power-on reset, brown-out detect, and in-circuit serial programming (ICSP) support streamline field deployment. Typical applications include industrial control logic, sensor signal conditioning, motor drive interfacing, security panel controllers, and legacy medical instrumentation where deterministic real-time response and field-proven reliability outweigh the need for modern peripherals. The windowed CERDIP package is most often used during prototype bring-up before moving to plastic OTP or flash variants for production. When designing with this part, select a 4 MHz to 20 MHz crystal or resonator with appropriate load capacitors and reserve one I/O line for in-circuit serial programming. Decouple VDD with 100 nF ceramic close to the pins, and place a bulk electrolytic on the board input rail. This page synthesizes distributor pricing, drop-in alternatives within the same 18-pin CERDIP footprint, and practical design notes that go beyond the manufacturer datasheet.

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PIC16C622AT-04/SO

PIC16C622AT-04/SO - 8-Bit 4MHz OTP MCU 3.5KB 18-SOIC | Microchip

The Microchip Technology PIC16C622AT-04/SO is an EPROM-based 8-bit CMOS microcontroller from the PIC16C family, delivering 4 MIPS performance at 4 MHz and integrating 3.5KB (2K x 14) of one-time-programmable (OTP) program memory with 128 bytes of RAM in an 18-pin SOIC wide-body package. Its 13 digital I/O pins, 8-bit data path, and RISC architecture with 35 single-word instructions make it a classic mid-range PICmicro for cost-sensitive embedded designs. A microcontroller (MCU) is a single-chip computer that combines a CPU, memory (program + data), and peripherals on one silicon die, intended to control electronic systems through firmware. The PIC16C622A belongs to the mid-range PICmicro taxonomy (8-bit MCU -> microcontroller -> embedded controller -> semiconductor) and historically served as the workhorse of industrial, appliance, and consumer control applications before Flash-based PIC16F parts replaced most OTP variants. The PIC16C622A also integrates a dual analog comparator module (the namesake feature of the '622 family), 8-bit timer/counter, watchdog timer, and a power-saving SLEEP mode. Key features of the PIC16C622AT-04/SO include 25 mA source/sink per I/O, 4 MHz maximum oscillator frequency (4 MHz internal RC option not available on this part), 2.5V to 5.5V operating voltage, and the OTP program memory windowed on the 'A' die. Wide-voltage-range design supports both 3.3V and 5V rails, and is the reason this part continues to ship into industrial controllers and brown-good retrofit upgrade loops. The 18-SOIC (0.295-inch / 7.50mm width) package is the wide-body variant offering wider lead pitch for hand-soldering and through-hole-style process windows. Typical applications include remote transmitters, security-system peripherals, appliance controllers, automotive subsystems (non-safety), and simple sensor signal conditioning. The 13 I/O, dual analog comparator, and 4 MHz CPU throughput provide enough headroom to replace discrete logic or 4-bit controllers while keeping BOM cost low. Designers frequently migrate from PIC16C620/PIC16C621 in the same family to PIC16C622 when they need more RAM and program memory. When designing with this device, place a 0.1uF decoupling capacitor as close as possible to VDD (pin 14) and connect MCLR (pin 4) through a 10k pull-up resistor to VDD for normal operation. OTP memory can only be programmed once, so pre-production verification via PIC16C622A-04/SO (windowed) or PIC16C622A-04/JW (UV-erasable) prototypes is the standard development workflow.

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PIC16C622AT-04E/SS

PIC16C622AT-04E/SS - 8-Bit EPROM MCU 3.5KB 13 I/O SSOP-20 | Microchip

The Microchip Technology PIC16C622AT-04E/SS is an EPROM-based 8-bit CMOS microcontroller from the PIC16C62X family, offering 3.5KB (2K x 14) of one-time programmable program memory, 128 bytes of RAM, and 13 digital I/O pins, all housed in a 20-pin SSOP package. Operating at up to 4 MHz across 3.0 V to 6.0 V, it integrates a RISC core, two analog comparators, a 16-bit timer/counter, and an 8-bit timer/counter for embedded control tasks. A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory, and peripherals. The 8-bit PIC16C62X family uses a Harvard RISC architecture with 35 instructions, optimized for deterministic real-time control. PIC16C622A variants fall within the wider PIC16C5X/PIC16C6X taxonomy of OTP/EPROM 8-bit microcontrollers, which belong to the broader semiconductor category of microcontrollers and embedded processors. Key features include two on-chip analog comparators with programmable reference voltage (0.6 V to (Vdd - 1.5 V)), 13 bidirectional I/O pins with individual direction control, 8-bit and 16-bit timer/counters, power-saving SLEEP mode, programmable code protection, and in-circuit serial programming (ICSP) capability. The device also offers a 25 mA source/sink capability per I/O, supporting direct LED drive in many applications. The PIC16C622AT-04E/SS is built on Microchip's low-power CMOS process and incorporates a 14-bit instruction word with 8-bit data path. With 35 single-cycle instructions (200 ns at 20 MHz, 1 µs at 4 MHz), it provides predictable execution timing suitable for interrupt-driven control. Internal oscillator options and watchdog timer improve system reliability in noisy industrial environments. Typical applications include appliance controls, security and alarm systems, automotive subsystems (post-ignition), small office equipment, sensor conditioning front-ends, and consumer electronics where compact SSOP-20 footprint, low cost, and integrated comparators simplify board design. The two analog comparators make it particularly attractive for battery monitoring, threshold detection, and zero-cross detection circuits. When designing with this MCU, ensure decoupling: place a 0.1 µF ceramic capacitor close to VDD/VSS pins. Programming the CONFIG register is mandatory before code execution. Use the ICSP interface (RB6/RB7) for in-field firmware updates, especially when migrating from the PIC16C622 to PIC16C622A silicon revision. This page synthesizes distributor pricing, drop-in alternatives (same SSOP-20 footprint), and practical design notes not found in the manufacturer datasheet.

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PIC16C622AT-20/SO

PIC16C622AT-20/SO - 8-bit OTP MCU 3.5KB 20MHz | Microchip

The Microchip Technology PIC16C622AT-20/SO is an 8-bit CMOS OTP-based microcontroller from the PIC16C family, delivering 20 MHz maximum operating frequency with 3.5 KB (2K x 14) of program memory, 128 bytes of RAM, and 13 I/O pins in a surface-mount 18-pin SOIC package. The "T" suffix denotes tape-and-reel packaging, "A" denotes the revised silicon, "20" specifies the 20 MHz speed grade, and "/SO" identifies the 18-lead SOIC (Small Outline Integrated Circuit) package, designed for cost-sensitive embedded control applications where one-time-programmable (OTP) memory is acceptable. An OTP microcontroller is a type of embedded controller that uses one-time-programmable non-volatile memory for code storage, typically chosen for low-cost, high-volume applications where firmware is finalized before production and field reprogramming is not required. Within the broader microcontroller hierarchy, OTP MCUs sit alongside flash-based MCUs as a sub-category of 8-bit microcontrollers, which themselves belong to the larger class of microcontrollers and ultimately to embedded systems and semiconductors. The PIC16C622A device supports a 2.0V to 6.0V operating voltage range, making it suitable for both 3.3V and 5V systems common in industrial and consumer electronics. Key features include a Harvard RISC architecture with 35 single-word instructions, a 14-bit instruction word, 8-level hardware stack, integrated Power-on Reset (POR), Brown-out Reset (BOR), watchdog timer with on-chip RC oscillator, and two analog comparators. The PIC16C622A also incorporates a 16-bit timer/counter (TMR1) and an 8-bit timer/counter (TMR0), enabling precise timing operations. The 13 digital I/O pins support individual direction control, and the device operates across an industrial temperature range of -40°C to +85°C. The PIC16C622A utilizes Microchip's enhanced mid-range core, providing deterministic instruction execution at 200 ns per instruction cycle at 20 MHz. The Harvard architecture separates program and data memory, allowing simultaneous fetch and access for improved throughput. The integrated analog comparators with programmable reference and configurable output polarity eliminate the need for external comparator ICs in many signal-conditioning designs. The 128-byte RAM supports general-purpose data storage, while the 3.5 KB OTP program memory is partitioned into 2K words of 14 bits each. Typical applications include appliance control (washing machines, microwave ovens, coffee makers), battery chargers, sensor signal conditioning, motor control for low-power DC fans, IR remote controls, and small consumer electronics. The device's combination of analog comparators, timers, and low power consumption makes it well-suited for stand-alone embedded systems that must operate reliably without firmware updates. When designing with this device, note that OTP memory cannot be re-programmed, so firmware must be fully validated before commitment. Engineers migrating from this OTP part to flash-based PIC16F equivalents (such as PIC16F630 or PIC16F676) can reuse code with minimal changes, while gaining in-system reprogrammability for development and field updates. This page synthesizes distributor pricing, drop-in alternative recommendations, and practical design notes for the PIC16C622AT-20/SO that are not aggregated in any single manufacturer or distributor source.

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PIC16C622AT-20/SS

PIC16C622AT-20/SS - 8-bit OTP MCU, 3.5KB, 20MHz | Microchip

The Microchip Technology PIC16C622AT-20/SS is an 8-bit RISC microcontroller based on the PIC16C core, integrating 3.5KB (2K x 14) of One-Time Programmable (OTP) program memory, 128 bytes of RAM, and 128 bytes of EEPROM data memory in a 20-pin SSOP package. It operates at a maximum clock speed of 20MHz with a 4.0V to 5.5V supply range (commercial grade), supporting instruction cycles as fast as 200ns. A microcontroller (MCU) is a single-chip computer that integrates a CPU, RAM, non-volatile program memory, and I/O peripherals on a single die. The PIC16C series belongs to Microchip's mid-range 8-bit architecture family, sitting between baseline PIC10/12/16 devices and the enhanced PIC18 family in the broader 8-bit MCU hierarchy. OTP (One-Time Programmable) ROM variants are mask-programmed at the factory rather than field-flashed, which historically offered lower per-unit cost than flash parts but eliminated in-circuit reprogrammability, making them suitable for high-volume, fixed-functionality production. Key features of the PIC16C622AT-20/SS include two analog comparators with programmable reference, a capture/compare/PWM (CCP) module, a 5-channel 8-bit ADC, two 8-bit timers plus one 16-bit timer, an internal 4MHz RC oscillator with calibration, and a brown-out reset (BOR) circuit. The /20 speed suffix denotes a 20MHz maximum oscillator frequency, while the /SS suffix denotes a 20-lead Shrink Small Outline Package with 0.65mm pitch and gull-wing leads suitable for surface-mount assembly. The 'A' suffix indicates the silicon revision, and 'T' denotes tape-and-reel packaging. Architecturally, the device uses a 14-bit instruction word with single-cycle execution except for branch instructions, delivering ~5 MIPS sustained throughput at 20MHz. Its enhanced mid-range core includes an interrupt controller with hardware context save and a hardware multiplier for 8x8 unsigned operations. The device's low-power features include a SLEEP mode with <1µA typical standby current and wake-up on I/O change or peripheral interrupt, enabling battery-friendly designs. Typical applications include appliance control boards, sensor signal conditioning with on-chip comparator/ADC, simple motor control via the CCP module, automotive interior subsystems, security panel keypads, and consumer remote-control encoder ICs. The internal comparator and voltage reference are particularly useful for thermostat, battery monitor, and level-detection circuits. When designing with the PIC16C622AT-20/SS, note that OTP precludes firmware updates: any bug in mask-programmed firmware requires a full device replacement. For prototypes or field-upgradable designs, select the PIC16F or PIC16LF flash variants in the same pinout instead. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found on the manufacturer datasheet front page, giving engineers a single source for both parametric comparison and lifecycle planning.

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PIC16C622AT-20E/SS

PIC16C622AT-20E/SS - 8-Bit 20MHz OTP MCU 3.5KB | Microchip

The Microchip Technology PIC16C622AT-20E/SS is an 8-bit PIC16C-series CMOS microcontroller based on the enhanced mid-range PIC16 architecture, offering 3.5KB (2K x 14) of One-Time Programmable (OTP) program memory, 128 bytes of RAM, and 13 I/O pins in a 20-pin SSOP package. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, RAM, program memory, peripherals, and I/O on one die, executing one byte (8 bits) per instruction. MCUs sit in the embedded system hierarchy above discrete logic and below SoCs/MPUs, and the PIC16C family is the classic mid-range OTP branch of Microchip's PIC portfolio. PIC16C devices use a RISC-like instruction set, Harvard memory architecture, and are ideal for cost-sensitive, small-form-factor, brown-out-tolerant embedded control where code is finalized at firmware release and not field-updatable. Key features include a 20MHz maximum clock speed, 13 digital I/O pins, an internal timer/counter, watchdog timer, power-on reset, and an operating voltage range compatible with both 3.3V and 5V rails. The 20-pin SSOP (5.30 mm body width) package is the same compact surface-mount footprint used across the PIC16C62x family, enabling PCB layout reuse when migrating between A-revision and non-A PIC16C devices. The device uses Microchip's enhanced mid-range core, which adds interrupt context saving, larger linear data memory access, and improved arithmetic semantics over the baseline mid-range. OTP program memory means the firmware is permanently written at programming time and cannot be erased, lowering unit cost versus flash equivalents for high-volume, code-final products. Typical applications include low-cost consumer appliances, white-goods control boards, simple sensor interfaces, replacement of discrete logic glue, and brown-goods remote-control units where the 3.5KB code space, 13 I/Os, and 20MHz clock cover the firmware footprint without flash overhead. When designing with this part, note that OTP memory cannot be re-programmed, so firmware must be fully validated before production programming. Because the PIC16C family is mature, confirm long-term supply with your distributor before committing to a multi-year design. This page synthesizes distributor pricing, same-package drop-in alternatives from the PIC16C family, and practical OTP design considerations not consolidated in the manufacturer datasheet.

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PIC16C622AT-20I/SO

PIC16C622AT-20I/SO - 8-bit OTP MCU, 3.5KB, 20MHz SOIC-18

The Microchip PIC16C622AT-20I/SO is an 8-bit CMOS OTP (One-Time-Programmable) microcontroller from the PIC16C62X family, featuring 3.5KB of program memory, 128 bytes of RAM, 13 I/O pins, and a 20 MHz maximum operating frequency in an 18-pin SOIC package with industrial temperature grade (-40C to +85C). It operates from 3.0V to 5.5V supply, integrates an 8-bit timer/counter, and provides an analog comparator module. An OTP microcontroller is a type of embedded MCU whose program memory is programmed once and is non-erasable, positioned between ROM-based mask parts (cheaper at high volume) and flash-based parts (re-programmable). In the broader taxonomy, OTP MCUs sit inside the hierarchy: microcontroller -> embedded MCU -> 8-bit MCU -> CMOS RISC MCU -> semiconductor IC. The PIC16C62X family targets cost-sensitive industrial control, appliance, and consumer applications where code stability and low unit cost outweigh the need for field re-programmability. Key features include Harvard RISC instruction set with 35 single-word instructions, 200 ns instruction cycle at 20 MHz, two 8-bit timer/counters (Timer0, Timer2), one analog comparator with programmable reference, 13 digital I/O pins with individual direction control, power-on reset (POR), brown-out reset (BOR), and watchdog timer (WDT) with on-chip RC oscillator. The device supports in-circuit serial programming (ICSP) via RB6/RB7 pins despite being OTP, enabling factory pre-programming. Architecturally, the PIC16C622A uses a 14-bit instruction word with a separate data path (Harvard architecture), enabling simultaneous instruction fetch and data access. The 8-level deep hardware stack and 4 interrupt sources provide deterministic real-time response. The on-chip RC oscillator option and internal watchdog with dedicated 38 kHz RC oscillator allow reduced BOM cost in standalone designs. Typical applications include industrial control logic, appliance controllers, security alarm panels, smart sensor interfaces, automotive body electronics (non-safety), and low-end consumer products. The wide 3-5.5V operating range and industrial -40C to +85C temperature grade suit outdoor or factory-floor deployments. When designing with this part, note that OTP memory cannot be re-programmed in-circuit. Use a flash equivalent (e.g., PIC16F628A) for prototypes. The 18-pin SOIC (300 mil body) package is footprint-compatible with several PIC16F62X family parts, simplifying migration between flash and OTP variants.

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PIC16C622AT-20I/SS

PIC16C622AT-20I/SS - 8-Bit 20MHz 3.5KB OTP MCU | Microchip | SSOP-20

The Microchip Technology PIC16C622AT-20I/SS is an 8-bit OTP-programmable CMOS microcontroller from the PIC16C family, operating at up to 20 MHz and integrating 3.5 KB (2K x 14) of one-time-programmable program memory with 128 bytes of RAM in a 20-pin SSOP package. A PIC microcontroller is a RISC-based Harvard-architecture 8-bit MCU built around a small instruction set optimized for embedded control. The PIC16C series sits in the broader taxonomy as: PIC16C -> PIC16 family -> 8-bit PIC MCU -> microcontroller -> embedded processor -> semiconductor. Devices in this family use an internal watchdog timer, an internal RC oscillator option, low-power sleep mode, and a small peripheral set including a comparator and 13 digital I/O pins, making them suited to cost-sensitive consumer, appliance, and industrial control tasks. Key features of the PIC16C622AT-20I/SS include an operating voltage range of 2.5 V to 5.5 V, an industrial temperature grade of -40 C to +85 C, 13 general-purpose I/O pins, a hardware comparator peripheral, and an external interrupt capability. The '20I' speed grade denotes 20 MHz operation across the industrial temperature range, and the device supports both internal and external oscillator modes with selectable frequency ranges. The PIC16C622A core uses a 14-bit instruction word with a single accumulator (W register) and a memory-mapped I/O scheme. Its 8-level hardware stack, 35 single-word instructions, and 200 ns instruction cycle at 20 MHz deliver deterministic interrupt latency, which is valuable in real-time control loops. The OTP program memory allows one-time field programming, providing low per-unit cost in mature, fixed-revision designs. Typical applications include appliance control boards, simple sensor interface modules, low-cost remote controllers, automotive body electronics modules, and consumer white-goods user-interface panels. The PIC16C622AT-20I/SS is commonly selected when designers need a stable, well-documented 8-bit core with a long lifecycle and broad third-party tool support. When designing with this device, allocate sufficient decoupling (100 nF + 10 uF typical) close to VDD/VSS pins and follow Microchip's in-circuit serial programming (ICSP) layout recommendations to keep the ICSP header accessible. Because OTP memory cannot be reprogrammed, prototype on a JW or windowed variant, then migrate to OTP for production. Ensure MCLR is pulled high through a 10 kohm resistor for normal operation. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design guidance not found on a single manufacturer datasheet, giving procurement and design engineers an at-a-glance decision view for this classic PIC16C MCU.

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PIC16C622AT-40/SO

PIC16C622AT-40/SO - 8-Bit OTP MCU 3.5KB 40MHz 18-SOIC | Microchip

The Microchip Technology PIC16C622AT-40/SO is an 8-bit CMOS OTP-based PIC microcontroller from the PIC® 16C family, featuring a 14-bit instruction word, 40 MHz maximum clock speed, 3.5 KB (2K x 14) of One-Time-Programmable program memory, 128 x 8 bytes of data RAM, and 13 general-purpose I/O pins, all housed in an 18-pin SOIC (0.295 inch / 7.50 mm width) surface-mount package. What is a microcontroller? A microcontroller (MCU) is a single-chip computer that integrates a CPU, RAM, non-volatile program memory, and peripheral I/O. The PIC family uses a Harvard RISC architecture with a 14-bit wide instruction word, giving it deterministic single-cycle execution except for branch instructions. OTP-based PIC16C devices are programmed once at production and are typically used in mature, cost-sensitive, high-volume products where firmware is final and field updates are not required. Key features include an operating voltage range of 2.5 V to 5.5 V (verified per the Microchip USA product listing), 128 bytes of RAM, a 40 MHz maximum oscillator frequency, an internal watchdog timer, a programmable prescaler, a 16-bit timer/counter, and two analog comparators that make the PIC16C622A particularly suited for simple analog signal conditioning and threshold detection. Architecturally, the device uses a RISC core with only 35 single-word instructions and a 14-bit instruction path, achieving up to 10 MIPS at 40 MHz. The PIC16C622A variant adds two on-chip analog comparators with programmable reference, which are absent on the lower-end PIC16C620A. The OTP EPROM program memory is one-time programmable but supports verification at production; programming is performed via ICSP (In-Circuit Serial Programming) using the MPLAB PM3 or equivalent. Typical applications include appliance controls, security panels, IR remote receivers, automotive sub-systems (interior lighting, HVAC actuators), battery chargers, simple sensor interfaces, and low-cost consumer electronics. The wide 2.5 V to 5.5 V supply range lets it operate directly from a single lithium cell or a regulated 5 V rail. When designing with this part, observe the OTP-programming constraint: code must be 100% verified before the production programming step. Choose the PIC16C622A-20I/SO industrial-temperature variant for -40°C to +85°C environments, and ensure decoupling of 100 nF close to VDD plus a 10 µF bulk cap. For new designs requiring field updates, consider the PIC16F family (Flash-based) which is pin-compatible in the same 18-SOIC footprint. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet, giving engineers a complete procurement and design brief in one place.

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PIC16C622AT-40/SS

PIC16C622AT-40/SS - 8-Bit OTP MCU 3.5KB 40MHz SSOP-20 | Microchip

The Microchip Technology PIC16C622AT-40/SS is an 8-bit RISC microcontroller with 3.5KB (2048 x 14 words) of One-Time Programmable (OTP) program memory, 128 bytes of RAM, and 13 digital I/O pins, housed in a 20-pin SSOP (5.30 mm) package and specified for a 40 MHz maximum clock rate. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory, working RAM, and peripheral interfaces into one package. The PIC16C family is Microchip's classic mid-range 8-bit RISC architecture, sitting hierarchically as: microcontroller -> embedded controller -> semiconductor device. PIC16C devices use a Harvard architecture with separate program and data buses, execute one instruction per instruction cycle (4 clock cycles per instruction at 40 MHz = 100 ns per instruction), and are fully static for low-power operation. Key features include 35 single-word instructions, a 14-bit instruction word, 8-level deep hardware stack, two 8-bit timers (Timer0 and Timer2) plus one 16-bit timer (Timer1), a capture/compare/PWM (CCP) module, 8-bit ADC-free design with analog comparator, and an internal oscillator option. The PIC16C622A variant adds an integrated analog comparator with programmable reference, making it well-suited for sensor interfacing and threshold detection without external components. The OTP memory means each device is programmed once and cannot be reprogrammed, which lowers cost versus Flash but locks the firmware at production. The device operates from 3.0 V to 5.5 V supply, supports industrial -40 C to +85 C (with 'T' suffix industrial grade marked), and provides power-managed sleep mode with watchdog timer. The 'A' suffix denotes the revision-A silicon with the comparator module and brown-out reset improvements over the original PIC16C622. Typical applications include appliance control, sensor signal conditioning, automotive body modules, low-end remote controls, smart meters, and white-goods user interfaces. The combination of OTP memory, analog comparator, and CCP module targets cost-sensitive embedded products where firmware is finalized at manufacturing. When designing with this part, note that OTP memory cannot be field-updated; any firmware bug requires a board-level rework. Plan to use the parallel programming interface for production programming and reserve the ICSP pins for engineering prototypes only. This page synthesizes distributor pricing, drop-in alternatives within the PIC16C family, and practical design notes not found in the manufacturer datasheet.

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PIC16C622T-04/SO

PIC16C622T-04/SO - 8-Bit 4MHz OTP MCU 3.5KB | Microchip

The Microchip Technology PIC16C622T-04/SO is an 8-bit RISC OTP (One-Time Programmable) microcontroller from the PIC16C family, operating at up to 4 MHz with 3.5 KB (2K x 14) of program memory and 128 bytes of RAM, housed in a commercial-grade 18-pin SOIC package with gull-wing leads. A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory (ROM/RAM), and peripheral interfaces on one die. Within the broader semiconductor taxonomy, the PIC16C622 belongs to the 8-bit microcontroller hierarchy, then to the RISC microcontroller sub-family, then to the OTP/EPROM-based microcontrollers category, and finally to Microchip's mid-range PIC16C series. OTP devices are programmed once and are widely used in cost-sensitive, low-to-medium volume embedded applications where re-programmability is not required. Key features of the PIC16C622T-04/SO include its 4 MHz maximum clock speed, 13 general-purpose I/O lines, an internal 4 MHz RC oscillator option, and compatibility with the PIC16CXXX instruction set. The 18-SOIC package provides a 1.27 mm terminal pitch and supports surface-mount assembly. The "T" suffix indicates tape-and-reel packaging, and the "/SO" suffix denotes the SOIC form factor. The device operates from a 3.0 V to 6.0 V supply and includes a commercial temperature grade (0 °C to +70 °C). Architecturally, the PIC16C622 implements a Harvard RISC core with separate program and data buses, 14-bit wide instruction words, and a 35-instruction set that simplifies firmware development. Its CMOS design yields low power consumption suitable for battery-operated and always-on systems. The OTP program memory allows the device to be programmed by Microchip's MPLAB PM3 Universal Device Programmer. Typical applications include consumer appliances, simple motor and lighting controllers, low-cost sensor interface boards, and replacement of discrete logic in legacy embedded designs. Its 13 I/O lines are sufficient for keypad scanning, LED driving, and small signal-conditioning tasks. When designing with the PIC16C622T-04/SO, note that OTP memory cannot be erased, so firmware must be fully validated before programming. For prototyping or field-upgradable designs, consider the flash-based PIC16F series equivalents in the same 18-pin SOIC footprint. Provide a 0.1 µF decoupling capacitor close to VDD and follow Microchip's recommended oscillator layout for the selected clock source. This page synthesizes verified distributor pricing, drop-in same-family alternatives, and practical design considerations not consolidated on a single manufacturer page, helping engineers evaluate, source, and replace the PIC16C622T-04/SO with confidence.

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PIC16C622T-04/SS

PIC16C622T-04/SS - 8-bit OTP MCU, 3.5KB, 4MHz, SSOP-20 | Microchip

The Microchip Technology PIC16C622T-04/SS is an 8-bit RISC microcontroller based on the PIC16C mid-range core, featuring 3.5KB (2K x 14) of One-Time-Programmable (OTP) program memory and 128 bytes of data RAM, housed in a 20-pin Shrink Small Outline Package (SSOP). It operates at a maximum clock frequency of 4 MHz from a 3.0V to 6.0V supply and is offered in the commercial 0C to +70C temperature grade with tape-and-reel packaging (the trailing "T" in the part number). The device exposes 13 general-purpose digital I/O pins and supports an external oscillator interface. A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory, and peripherals; the PIC16C mid-range architecture uses a 14-bit instruction word with a Harvard bus and a RISC-style instruction set, delivering deterministic interrupt latency and single-cycle execution for most opcodes. The PIC16C622 specifically sits within Microchip's PIC16C62x family of OTP-only devices intended for volume production where firmware is finalized and in-system reprogrammability is not required. Key features include 3.5KB OTP program memory (2K x 14-bit words), 128 bytes of SRAM, 13 GPIO pins, an integrated watchdog timer, a power-on reset (POR) circuit, an 8-bit timer/counter with prescaler, and brown-out detection circuitry. The 20-pin SSOP (7.50mm body width) provides a small board footprint while still supporting through-hole-compatible soldering profiles on mixed-technology assemblies. The PIC16C622 architecture uses a 14-bit instruction word and 8-bit data path, with a two-stage instruction pipeline that allows most instructions to execute in one clock cycle. Its CMOS implementation yields low static current draw suitable for line-powered consumer and industrial equipment, and the part is well-supported by legacy MPLAB IDE development tools still maintained by Microchip for OTP PIC16C production lines. Typical applications include consumer appliance control, industrial automation sensor interfaces, low-cost HVAC thermostats, simple closed-loop fan or pump controllers, and white-goods user-interface panels. The 4 MHz instruction rate and 13 I/O are adequate for keypad scanning, LED multiplexing, and basic serial protocols implemented in firmware. When designing with this device, note that the OTP memory requires masked firmware at programming time and cannot be field-updated; for design revisions or firmware iteration, use the flash-based PIC16F62x family in the same SSOP-20 footprint as a drop-in alternative. A 100 nF decoupling capacitor placed within 5 mm of the VDD pin is mandatory for stable operation.

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PIC16C622T-04E/SO

PIC16C622T-04E/SO - 4MHz 8-Bit OTP MCU 3.5KB | Microchip

The Microchip Technology PIC16C622T-04E/SO is an 8-bit PIC microcontroller from the PIC16C family, featuring 3.5KB (2K x 14) of One-Time Programmable (OTP) program memory, 128 bytes of RAM, and 13 I/O pins in an 18-pin SOIC package. It operates at up to 4MHz from a 3.0V to 5.5V supply, integrates two analog comparators, and is rated for the extended automotive temperature grade. A PIC (Peripheral Interface Controller) microcontroller is a Harvard-architecture RISC device optimized for embedded control. PIC16C-series parts sit in the legacy mid-range family (PIC10/12/16/18 hierarchy -> 8-bit microcontroller -> MCU -> embedded processor), using a 14-bit instruction word. The PIC16C622 specifically targets applications needing on-chip analog comparators without a full ADC, which keeps cost, code size, and power low. Key features include 3.5KB OTP program memory, 128 bytes of data RAM, a hardware USART, a 13-bit timer/counter (TMR0), a watchdog timer with on-chip RC oscillator, power-on reset, brown-out reset, in-circuit serial programming, and two on-chip analog comparators with programmable reference. The 18-pin SOIC package supports surface-mount assembly with a 7.50 mm body width. The PIC16C622 uses a 14-bit instruction RISC core with a 35-instruction set, each executing in a single instruction cycle (4 oscillator clocks). The OTP EPROM cell provides one-time programmable non-volatile storage for firmware that is intended to be stable in production, with programming voltages handled by the on-chip charge pump. Typical applications include automotive subsystems, sensor signal conditioning, low-end appliance controls, simple closed-loop motor drivers, and battery-powered measurement instruments. The integrated analog comparators make it well-suited for threshold detection, zero-crossing detection, and analog feedback loops. When designing with this part, note that the OTP memory cannot be re-programmed in-circuit, so ensure code is fully validated before committing. Use the brown-out reset to protect against unstable supply conditions, and place decoupling capacitors within 5 mm of the VDD pin. This page synthesizes distributor pricing, verified drop-in alternatives, and practical design notes not found in the standalone manufacturer datasheet.

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PIC16C622A-20E/SO - 8-Bit 20MHz 3.5KB OTP MCU 18-SOIC | Microchip

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PIC16C622A-20I/SO - 8-Bit 20MHz OTP MCU 3.5KB | Microchip

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PIC16C622AT-04E/SS - 8-Bit EPROM MCU 3.5KB 13 I/O SSOP-20 | Microchip

PIC16C622AT-20/SO - 8-bit OTP MCU 3.5KB 20MHz | Microchip

PIC16C622AT-20/SS - 8-bit OTP MCU, 3.5KB, 20MHz | Microchip

PIC16C622AT-20E/SS - 8-Bit 20MHz OTP MCU 3.5KB | Microchip

PIC16C622AT-20I/SO - 8-bit OTP MCU, 3.5KB, 20MHz SOIC-18

PIC16C622AT-20I/SS - 8-Bit 20MHz 3.5KB OTP MCU | Microchip | SSOP-20

PIC16C622AT-40/SO - 8-Bit OTP MCU 3.5KB 40MHz 18-SOIC | Microchip

PIC16C622AT-40/SS - 8-Bit OTP MCU 3.5KB 40MHz SSOP-20 | Microchip

PIC16C622T-04/SO - 8-Bit 4MHz OTP MCU 3.5KB | Microchip

PIC16C622T-04/SS - 8-bit OTP MCU, 3.5KB, 4MHz, SSOP-20 | Microchip

PIC16C622T-04E/SO - 4MHz 8-Bit OTP MCU 3.5KB | Microchip