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PIC16C620A-20/SO - 8-Bit 20MHz OTP MCU 896B | Microchip
PIC16C620A-20/SO

PIC16C620A-20/SO - 8-Bit 20MHz OTP MCU 896B | Microchip

The Microchip Technology PIC16C620A-20/SO is an 8-bit EPROM/OTP-based CMOS microcontroller in the PIC16C family, featuring 20MHz maximum clock speed, 896 bytes (512 x 14) of program memory, 96 bytes of RAM, and 13 I/O pins in an 18-pin SOIC package. It belongs to Microchip's PICmicro 16C mid-range family of RISC microcontrollers with only 35 single-word instructions to learn, enabling rapid development of embedded control applications. A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory (ROM/RAM), and peripherals on one die. The PIC16C62X series specifically is the 18- and 20-pin ROM/EPROM-based member of Microchip's versatile PICmicro family, sitting at the entry-level of the 8-bit MCU hierarchy. The 'A' revision adds enhancements over the original PIC16C620, and the -20 speed grade denotes 20MHz operation (200ns instruction cycle). The OTP (One-Time Programmable) EPROM program memory makes it suited for low-to-medium volume production where Flash reprogrammability is not required. Key features include 20MHz operating frequency (200ns instruction execution), 8-level hardware stack, 14-bit wide instruction word, 8-bit data path, internal and external oscillator support, brown-out detect/reset, power-on reset (POR), and watchdog timer (WDT). The 18-SOIC package provides 13 digital I/O pins with individually configurable direction and weak pull-up options. Operating voltage range spans 2.5V to 6.0V, with low-power CMOS design supporting both active and sleep modes for battery-friendly designs. The PIC16C620A-20/SO uses a Harvard RISC architecture with separate program and data buses, achieving deterministic instruction throughput critical for real-time control. Built-in peripherals include an 8-bit timer/counter (TMR0) with 8-bit prescaler, a 16-bit timer/counter (TMR1), and a capture/compare/PWM (CCP) module. The CMOS process delivers low quiescent current in sleep mode, making the part suitable for power-constrained embedded applications where simple I/O expansion and timing control are required. Typical applications include appliance control (washing machines, microwave ovens, coffee makers), automotive body electronics (window lift, seat control, climate modules), industrial sensors and actuators, security and alarm systems, and small motor control boards. Its small 18-SOIC footprint and high noise immunity also suit it for harsh industrial environments. When designing with the PIC16C620A-20/SO, note that the EPROM/OTP memory cannot be electrically erased, so code must be fully verified before programming. In-circuit debug is supported via the ICSP (In-Circuit Serial Programming) interface; use the MPLAB PM3 programmer to develop code. For new designs, consider the pin-compatible Flash-based PIC16F627A/PIC16F628A for greater design flexibility at similar cost.

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PIC16C620A-20/SS - 8-bit OTP MCU, 20MHz, SSOP-20 | Microchip
PIC16C620A-20/SS

PIC16C620A-20/SS - 8-bit OTP MCU, 20MHz, SSOP-20 | Microchip

The Microchip Technology PIC16C620A-20/SS is an EPROM-based 8-bit CMOS microcontroller built on Microchip's PIC RISC architecture, housed in a 20-pin SSOP (R-PDSO-G20) package with 0.65 mm terminal pitch. The device operates at a maximum clock frequency of 20 MHz, delivers 200 ns instruction execution time, and integrates 896 bytes of one-time-programmable (OTP) program memory with 96 bytes of RAM. The part operates across 3.0 V to 5.5 V supply and supports an industrial -40C to +85C temperature range (per the -20 industrial-grade suffix). What is an 8-bit OTP microcontroller? An 8-bit microcontroller (MCU) is a small computing system-on-chip integrating a CPU, RAM, program memory, and peripherals on a single die. OTP (one-time-programmable) memory can be written only once, making OTP MCUs the lowest-cost option for high-volume production firmware. Within the hierarchy of embedded controllers, OTP MCUs sit beneath flash-MCU, ROM-MCU, and UV-EPROM MCU categories. The PIC16C620A belongs to Microchip's PIC16 mid-range family, widely adopted in appliance control, sensor interfaces, and simple state machines. Key features include 35 single-word instructions, a 14-bit instruction word, an 8-level hardware stack, two 8-bit timers (TMR0, TMR2) and one capture/compare/PWM module (CCP), an analog comparator with two inputs, 13 digital I/O pins, an internal watchdog timer with on-chip RC oscillator, and an in-circuit serial programming (ICSP) interface. The device is supported by the MPLAB IDE and the MPLAB PM3 universal device programmer, allowing bench-top programming and in-system debug. Architecturally, the PIC16C620A uses a Harvard-style RISC core with separate program and data buses, enabling single-cycle instruction fetch while data is read or written. The integrated analog comparator and reference module make the part well-suited for threshold detection without an external op-amp. Typical applications include appliance control boards, IR remote receivers, sensor signal conditioning, battery chargers, small motor control loops, and low-cost consumer products requiring one-time programmable firmware in industrial temperature ranges. When designing with this part, note that OTP memory cannot be reprogrammed in the field - prototype firmware should be validated on the PIC16F62xA flash sibling before committing to OTP. Designers should also confirm the ICSP programming header is accessible without removing the MCU from the board. This page synthesizes distributor pricing, drop-in alternatives from Microchip's PIC16 family, and practical design notes not found in the standalone manufacturer datasheet.

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PIC16C620A-20E/SO - 8-Bit 20MHz OTP MCU, 18-SOIC | Microchip
PIC16C620A-20E/SO

PIC16C620A-20E/SO - 8-Bit 20MHz OTP MCU, 18-SOIC | Microchip

The Microchip Technology PIC16C620A-20E/SO is an EPROM-based 8-bit CMOS microcontroller from the PIC16C family, delivering 20 MHz clock input with 200 ns single-cycle instruction execution in a surface-mount 18-SOIC (0.295 inch / 7.50 mm width) package. It integrates 896 bytes (512 x 14) of One-Time-Programmable (OTP) program memory, 96 bytes of RAM, and 13 I/O pins, and is rated for the extended industrial temperature range (-40C to +125C). An OTP microcontroller is a non-erasable, non-flash MCU whose program memory is written once via an external programmer and cannot be re-programmed in-circuit; this makes OTP parts cost-optimized for mature, stable firmware in high-volume products where field updates are not required. PIC16C-series MCUs sit in the broader taxonomy of 8-bit Microcontroller -> Microcontroller (MCU) -> Integrated Circuit -> Semiconductor, and the PIC16C620A specifically is the lower-memory sibling (896B program) of the PIC16C622/PIC16C622A (which add 1K/2K program memory). Key features include 35 single-word RISC instructions, single-cycle execution (except program branches which take two cycles), a wide 2.5V to 6.0V operating voltage range supporting both 3.3V and 5V rails, and a 200 ns instruction cycle. The extended (-40C to +125C) temperature grade (denoted by the "E" suffix) and SOIC package footprint make this part suited to industrial control boards where through-hole PIC16C parts cannot be used. Architecture at the silicon level: PIC16C620A is implemented in CMOS EPROM technology with a Harvard-style RISC core, an internal oscillator option, and a peripheral set including a comparator, timer, and watchdog. The "20" speed suffix denotes the 20 MHz maximum clock and 200 ns instruction cycle; the "-04" variants run at 4 MHz / 1 us. Typical applications include industrial automation controllers, white-goods motor control front-ends, and automotive under-hood sub-assemblies where OTP cost advantage outweighs the lack of field-update capability. When designing, note that the EPROM windowless package means code cannot be erased by UV; prototypes should use a JW (windowed) or flash PIC16F equivalent for development and switch to PIC16C620A-20E/SO for production. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found on the manufacturer datasheet alone.

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PIC16C620A-20E/SS - 8-bit OTP MCU, 20MHz, SSOP-20 | Microchip
PIC16C620A-20E/SS

PIC16C620A-20E/SS - 8-bit OTP MCU, 20MHz, SSOP-20 | Microchip

The Microchip Technology PIC16C620A-20E/SS is a 20 MHz, 8-bit EPROM/OTP-based CMOS microcontroller in a 20-pin SSOP package with extended -40C to +125C operating temperature range. It features 896 bytes of program memory, 96 bytes of RAM, 13 I/O pins, and a 35-instruction RISC architecture with 200 ns single-cycle instruction execution. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program and data memory, peripherals, and I/O onto one IC. MCUs form the embedded intelligence behind industrial controllers, automotive ECUs, consumer appliances, and sensor nodes. Within the MCU hierarchy, the PIC16C620A sits in the 8-bit RISC class, distinguished from 16-bit and 32-bit MCUs by its compact instruction set, deterministic timing, and ultra-low cost - making it well-suited for high-volume, latency-predictable applications. Key features include two analog comparators with on-chip voltage reference, a Watchdog Timer with its own on-chip RC oscillator for reliable operation, programmable code protection, and power-saving SLEEP mode. The 13 digital I/O pins can source/sink up to 25 mA, enabling direct LED drive without external transistors. The wide 2.5V to 5.5V supply range accommodates battery-powered designs. The PIC16C620A uses a Harvard RISC architecture with separate program and data buses, achieving single-cycle execution for most instructions. The 35-instruction set simplifies coding while preserving high code density, and the integrated EPROM allows prototype and small-volume programming via windowed or OTP variants. Typical applications include automotive body controllers, industrial sensor interfaces, appliance control boards, security alarm panels, and general-purpose embedded logic replacement. The 20 MHz clock with 200 ns instruction cycle supports real-time control loops in motor drive and power conversion subsystems. When designing with this part, note that the PIC16C620A is in the EPROM/OTP family - not flash-based - so firmware is one-time programmable and cannot be field-upgraded. Choose a PIC16F equivalent for flash reprogrammability, but verify pinout and peripheral compatibility first. This page synthesizes distributor pricing, same-family drop-in alternatives, and practical design notes not consolidated in the manufacturer datasheet alone.

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PIC16C620A-20I/P - 8-Bit 20MHz OTP MCU 896B | Microchip
PIC16C620A-20I/P

PIC16C620A-20I/P - 8-Bit 20MHz OTP MCU 896B | Microchip

The Microchip Technology PIC16C620A-20I/P is an 8-bit CMOS OTP-based PIC microcontroller with 20MHz maximum clock speed, 896 bytes (512 x 14) of One-Time-Programmable program memory, 96 bytes of RAM, and 13 I/O pins, packaged in an 18-pin PDIP through-hole form factor. It is part of Microchip's PIC16C family, an industry-standard 8-bit RISC architecture using only 35 single-word instructions, and operates across 2.5V to 5.5V with an industrial temperature range of -40C to +85C. The "20" speed suffix denotes 20MHz operation with 100ns minimum instruction execution; the "I" denotes the industrial temperature grade. A microcontroller (MCU) is a single-chip computer containing a CPU core, non-volatile program memory, working RAM, and programmable I/O peripherals. MCUs belong to the broader category of embedded processors, which sit below microprocessors in computational complexity but above discrete logic in integration. The PIC16C620A falls within the PIC16C mid-range family of MCUs, which are OTP (one-time-programmable) variants intended for mature, cost-sensitive production. Compared to flash-based PIC16F successors, OTP parts typically ship at lower unit cost but require mask/UV-erase discipline during development. Key features include 200ns instruction cycle at 20MHz, 8-level hardware stack, 4MHz internal oscillator option on selected variants, two 8-bit timers plus one 16-bit timer, a watchdog timer with on-chip RC oscillator, power-on reset, brown-out detect, an analog comparator, and a capture/compare/PWM (CCP) module. Thirteen I/O pins are shared with the analog comparator inputs and external interrupt sources, enabling mixed-signal front-ends without external glue logic. Architecturally, the PIC16C620A uses a Harvard-class RISC engine with separate program and data buses, a 14-bit instruction word, and a deterministic instruction pipeline. The OTP memory is implemented as EPROM cells, which retain data indefinitely after programming but cannot be electrically erased, so this part is typically used in production runs where firmware is finalized. Typical applications include appliance control boards, lighting ballasts, security sensor interfaces, automotive body modules (non-safety), industrial counter/timer boards, and low-end consumer white-goods controllers. The wide operating voltage range and robust ESD/latch-up immunity make it a frequent choice for cost-driven replacement of older PIC16C5x designs. When designing with this part, ensure the chosen programmer (such as MPLAB PM3 or ICD-type debuggers limited to OTP-emulator parts) supports 18-pin PIC16C OTP; emulation via PIC16C620A-20/JW ceramic-windowed units is the standard development flow. Decoupling should include a 100nF ceramic capacitor adjacent to VDD with a bulk 10uF tantalum or aluminum polymer near the supply pin. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone. XAIPART cross-references the Microchip cross-reference tool output with package data to identify pin-compatible drop-in replacements.

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PIC16C620A-20I/SO - 8-Bit 20MHz OTP MCU 896B | Microchip/SoC
PIC16C620A-20I/SO

PIC16C620A-20I/SO - 8-Bit 20MHz OTP MCU 896B | Microchip/SoC

The Microchip Technology PIC16C620A-20I/SO is an 8-bit PIC16C-series CMOS microcontroller (MCU) built on Microchip's RISC architecture, operating at up to 20 MHz instruction throughput and packaged in a lead-bearing 18-pin SOIC (SO) wide-body IC package. The device integrates 896 bytes (512 x 14) of one-time-programmable (OTP) program memory, 96 bytes of SRAM data memory, and 13 general-purpose digital I/O pins, providing the deterministic real-time control that defines the mid-range PIC family. The '-20I' speed/temperature suffix denotes a 20 MHz maximum clock and an industrial -40C to +85C operating temperature range; the '/SO' suffix denotes the 7.50 mm wide-body 18-SOIC package footprint. A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory (ROM/Flash/OTP), data memory (RAM), and configurable I/O peripherals. The PIC16C620A belongs to the product hierarchy: microcontroller -> 8-bit MCU -> PIC16 family -> PIC16C6xx sub-family -> voltage supervisor / comparator-equipped variant. The 16C6xx series is historically significant for introducing on-chip analog comparators and a brown-out reset (BOR) peripheral to the PIC mid-range line, predating and informing the later PIC16F6xx Flash-based family. Key features include a RISC instruction set of only 35 single-word instructions, a hardware multiplier for limited arithmetic, a 14-bit instruction word, an 8-bit data path, and a programmable watchdog timer with on-chip RC oscillator. The 16C620A also integrates two on-chip analog comparators with programmable reference, a 5-channel 8-bit ADC-free analog subsystem, and a brown-out reset circuit. Industrial-temperature operation (-40C to +85C) and 2.5V to 5.5V wide operating voltage make the part suitable for factory-floor equipment, automotive subsystems, and battery-powered instrumentation. The OTP program memory makes the part intended for volume production where code is stable and field upgrades are not required. Architecturally, the 16C620A uses a Harvard-class separate instruction/data bus, an 8-level deep hardware stack, and a single-cycle ALU branch structure. The wide-body 18-SOIC package offers a larger lead frame than 8-pin or 14-pin SO packages, easing hand-soldering and rework on legacy boards while retaining surface-mount compatibility with modern pick-and-place lines. The PIC16C620A was among the first PIC16C6xx devices to combine analog comparators and BOR on-chip, eliminating external analog and supervisor ICs in many appliance, motor-control, and security designs. Typical applications include appliance controllers (washing-machine motor drivers, microwave oven user interfaces), security-system keypad/PIR panels, simple sensor-signal conditioning, and automotive body modules. The 13 I/O pins are sufficient for keyboard-scan, LED/relay-driving, and triac phase-angle control interfaces. The on-chip comparators enable zero-crossing detectors and battery-voltage sensing without external op-amps. Designers choose the 16C620A when code volume is modest, deterministic timing is mandatory, and OTP cost savings outweigh Flash reprogrammability for production runs above a few thousand units per year. When designing with this device, allocate two I/O pins to the in-circuit serial programming (ICSP) interface to enable factory code loading after PCB assembly; OTP parts cannot be re-programmed in the field. Place a 0.1 uF ceramic bypass capacitor within 5 mm of VDD and a bulk 10 uF electrolytic near the IC, and reserve RB6/RB7 (or GP0/GP1 on related parts) for ICSP clock and data to avoid rework complications if firmware is updated.

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PIC16C620A-20I/SS - 8-Bit 20MHz OTP MCU 896B | Microchip
PIC16C620A-20I/SS

PIC16C620A-20I/SS - 8-Bit 20MHz OTP MCU 896B | Microchip

The Microchip Technology PIC16C620A-20I/SS is an 8-bit RISC microcontroller from the PIC16C62X family with 896 bytes (512 x 14) of one-time programmable (OTP) program memory, 96 bytes of RAM, and 13 digital I/O pins, housed in a 20-pin SSOP package. It operates from a 2.5V to 5.5V supply, executes instructions at 20MHz (200ns instruction cycle), and is rated for the industrial -40C to +85C temperature range. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, working RAM, and programmable I/O peripherals. The PIC16C62X architecture belongs to the broader hierarchy of 8-bit microcontrollers, which sit beneath 16-bit and 32-bit MCUs in the semiconductor taxonomy: MCU -> microcontroller -> embedded processor -> semiconductor. Microchip's PIC family uses a Harvard RISC architecture with only 35 single-word instructions, simplifying code development for cost-sensitive embedded designs where headroom for advanced peripherals is not required. Key differentiating features of the PIC16C620A include an integrated analog comparator with programmable on-chip voltage reference, a watchdog timer with its own on-chip RC oscillator for fail-safe operation, and an internal 4MHz RC oscillator that can free the external oscillator pins for general-purpose I/O. The device consumes low operating current and supports power-managed Sleep mode with wake-up on pin change. Technically, the PIC16C62X core uses a 14-bit instruction word with an 8-bit data path, and the OTP program memory is accessed through a 14-bit program counter. The 96 bytes of RAM are partitioned into general-purpose registers and special-function registers controlling I/O ports, timers, and the comparator subsystem. Two 8-bit timers (Timer0 and Timer2) plus one 16-bit timer (Timer1) provide flexible event counting, while a capture/compare/PWM (CCP) module supports basic motor and lighting control. Typical applications include consumer appliance controllers, automotive interior lighting, security alarm panels, IR remote control transmitters, and small sensor-interface nodes. The OTP memory makes it well suited to high-volume, low-cost products where firmware is finalized at production time and in-circuit reprogramming is not required. When designing with this part, choose the -I industrial temperature grade (-40C to +85C) for outdoor or automotive cabin environments; the commercial -20/SS variant is limited to 0C to +70C. Note that OTP memory cannot be erased - prototypes should be validated on the flash-based PIC16F628 equivalent, then migrated to PIC16C620A-20I/SS for production.

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PIC16C620A-40/SO - 8-Bit 40MHz OTP MCU, 18-SOIC | Microchip
PIC16C620A-40/SO

PIC16C620A-40/SO - 8-Bit 40MHz OTP MCU, 18-SOIC | Microchip

The Microchip Technology PIC16C620A-40/SO is an 8-bit RISC microcontroller running at 40 MHz with 896 bytes (512 x 14) of One-Time Programmable (OTP) program memory, housed in an 18-pin SOIC package (0.295" / 7.50 mm body width). It provides 13 digital I/O lines, 96 bytes of RAM, and operates from 2.5 V to 5.5 V with a built-in brown-out reset, power-on reset, and watchdog timer. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, RAM, non-volatile program memory (ROM/EPROM/Flash), and peripherals into one package. The PIC16C620A belongs to the PIC16C family of CMOS, fully-static, OTP-based MCUs that execute one instruction per clock cycle using Microchip's RISC architecture. This makes PIC16C620A part of the broader hierarchy: 8-bit MCU -> microcontroller -> embedded controller -> semiconductor IC. OTP memory allows the device to be programmed once during manufacturing or in-circuit, suiting cost-sensitive production where firmware is fixed. Key features include 35 single-word instructions (most single-cycle, 200 ns at 20 MHz / 100 ns at 40 MHz), a Harvard architecture with separate program and data buses, and an external oscillator interface. The brown-out detect/reset (BOR), power-on reset (POR), and watchdog timer (WDT) provide robust operation in electrically noisy industrial environments. The CMOS design minimizes power consumption, with low standby current ideal for battery-powered or sleep-mode applications. The PIC16C620A-40/SO uses a 14-bit instruction word and 8-bit data path, balancing code density and ease of programming. Compared with its predecessor PIC16C620, the A-revision improved electrical specifications and is a recommended functional upgrade. Program memory is OTP, meaning each unit can be written only once; this suits production runs where firmware is finalized. Typical applications include appliance control, sensor interfacing, industrial automation, automotive body electronics (non-safety), and low-cost consumer devices. The 13 I/O lines comfortably handle key matrices, LEDs, and serial interfaces. The wide 2.5 V to 5.5 V supply range allows operation from regulated 3.3 V or 5 V rails. The external oscillator supports crystals, resonators, or clock sources up to 40 MHz. When designing with this part, remember OTP memory cannot be reprogrammed, so use a Flash equivalent (e.g., PIC16F630-I/SL) during development. Decoupling capacitors (100 nF) must be placed close to VDD/VSS, and unused I/O pins should be configured as outputs to minimize current consumption. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet. Information is current as of 2026-09-17.

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PIC16C620A/JW - 8-Bit OTP MCU, 20MHz, 896B EPROM, UV Window | Microchip
PIC16C620A/JW

PIC16C620A/JW - 8-Bit OTP MCU, 20MHz, 896B EPROM, UV Window | Microchip

The Microchip Technology PIC16C620A/JW is an EPROM-based 8-bit CMOS microcontroller with 896 bytes (512 x 14) of one-time-programmable program memory housed in an 18-pin CERDIP window package for in-circuit UV erasure and reprogramming. It executes instructions in 200 ns (5 MHz oscillator, 4 clock cycles per instruction), supports an external clock input up to 20 MHz, and integrates 96 bytes of memory and 13 digital I/O lines on a classic PIC16C mid-range architecture. The /JW suffix denotes the quartz-window CERDIP variant used for engineering development and field-reprogrammable prototypes rather than volume production OTP. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory (ROM/EPROM/Flash), data memory (RAM), and peripherals on one die. The PIC16C620A belongs to the PIC16C family of OTP/EPROM mid-range microcontrollers, sitting hierarchically below modern Flash-based PIC16F parts in Microchip's product tree. Compared with later PIC16F parts that use Flash memory, OTP EPROM is non-volatile but one-time-programmable per device, except for the /JW windowed CERDIC variants which can be erased by UV exposure and reprogrammed, which makes them ideal for code development, low-volume specialty products, and legacy maintenance work. Key features include a Harvard RISC architecture with 35 single-word instructions, a programmable code protection bit, a power-on reset (POR) circuit, a watchdog timer with an on-chip RC oscillator, a programmable brown-out reset (BOR), a 16-bit timer/counter with a prescaler, and a capture/compare/PWM (CCP) module. Two comparators with programmable on-chip voltage reference are integrated for analog signal conditioning, and the device operates from 3.0 V to 5.5 V with low-power sleep and watchdog wake-up functions. These capabilities allow the PIC16C620A/JW to act as a complete system-on-chip for small control loops. The PIC16C620A/JW uses a 14-bit instruction word and a separate 8-bit data path, which simplifies decoding of opcodes and reduces die area. The 13 I/O pins are bidirectional and individually programmable, with internal weak pull-ups that can be enabled per port. Two analog comparators with rail-to-rail inputs (when configured) interface directly to sensors or analog front-end circuits, while the 8-bit PWM channel and 16-bit timer support motor-control, lighting, and simple closed-loop applications without external hardware. Typical applications include appliance control, security and alarm panels, automotive interior modules (pre-CAN era), HVAC fan/thermostat controllers, battery chargers, and industrial sensor interfaces. The UV-erasable CERDIP package is especially useful for educational labs and aerospace/defense long-life-cycle programs that prefer erasable programmable parts over OTP. The internal comparator simplifies thermostat and charger designs by eliminating an external op-amp. When designing with this device, mind the programming-voltage requirement (Vpp ~13 V) and the parallel programming protocol implemented by MPLAB PM3 and similar tools; in-circuit serial programming is not available on this older part. The /JW windowed CERDIP package is significantly larger and more expensive than the plastic DIP/SOIC OTP variants; choose PIC16C620A-04/P, /SO or /SS for production builds. Provide adequate decoupling (100 nF plus 10 uF bulk) and follow Microchip's recommended oscillator layout for the 18-pin CERDIP footprint. This page consolidates current distributor pricing, drop-in package alternatives, application guidance and design notes beyond what is in the manufacturer datasheet.

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PIC16C620AT-04/SO - 8-bit 4MHz 18SOIC OTP MCU | PIC16C620A Series
PIC16C620AT-04/SO

PIC16C620AT-04/SO - 8-bit 4MHz 18SOIC OTP MCU | PIC16C620A Series

The Microchip Technology PIC16C620AT-04/SO is an EPROM-based 8-bit CMOS microcontroller from the PIC16C620A family, operating at 4 MHz with 896 bytes of program memory (512 x 14 OTP) and 96 bytes of RAM, housed in an 18-pin SOIC (SO) package. It integrates 13 I/O pins, a 5-channel 8-bit analog-to-digital converter, two comparators, and a watchdog timer for closed-loop control. An 8-bit microcontroller is a single-chip computer built around an 8-bit data path, optimized for deterministic, low-cost embedded control. The PIC architecture uses a Harvard design with separate program and data buses and a reduced instruction set (RISC) of only 35 single-word instructions. The 'C' series is the OTP (one-time programmable) variant of the original PIC16C family, positioned between the older windowed UV-erasable parts and the later Flash-based PIC16F family in the Microchip product hierarchy. LDO regulators and supervisor ICs typically surround such MCUs to provide clean 5V rails and brown-out reset. The PIC16C620AT-04/SO runs from 3.0V to 5.5V, supports an instruction cycle time of 200 ns at 4 MHz, and offers programmable code protection. The 'A' silicon revision adds brown-out detect (BOR), an internal RC oscillator option, and improved ADC accuracy versus the original PIC16C620. The 'T' suffix indicates tape-and-reel packaging for high-volume assembly, and 'SO' specifies the 7.50 mm body-width 18-SOIC surface-mount package. Peripherals include a 16-bit timer/counter with 3-bit prescaler, an 8-bit timer/counter, a synchronous serial port (SSP) supporting an SPI-master interface, and two analog comparators with programmable reference. The PIC16C620A architecture combines a RISC CPU core, EPROM program memory, and rich analog peripherals in a compact footprint, enabling standalone control loops without external logic. The on-chip comparators and ADC make it well suited for sensor conditioning, while the interrupt controller with 7 sources supports responsive pre-emptive task handling. Static CMOS design with software-selectable oscillator options (RC, XT, LP, HS) allows engineers to trade speed against current consumption. Typical applications include battery chargers, SMPS control loops, sensor signal conditioning, low-cost motor control, security and alarm panels, and consumer appliance interfaces. The wide supply range, integrated analog, and small package also suit industrial instrumentation and automotive body electronics where the OTP/Flash migration path preserves firmware investments. When designing with the PIC16C620AT-04/SO, choose an external clock frequency that matches the oscillator mode (XT for 4 MHz) and ensure Vdd decoupling with a 100 nF ceramic plus 10 uF bulk capacitor within 5 mm of the IC. Plan OTP programming during prototyping because OTP parts cannot be reprogrammed; budget for the PIC16F628A as a Flash-based migration path for production. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes that complement the manufacturer datasheet for the PIC16C620AT-04/SO.

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PIC16C620AT-04E/SO - 8-Bit 4MHz OTP MCU 896B | Microchip
PIC16C620AT-04E/SO

PIC16C620AT-04E/SO - 8-Bit 4MHz OTP MCU 896B | Microchip

The Microchip Technology PIC16C620AT-04E/SO is an 8-bit PIC microcontroller from the PIC16Cxx family featuring 896 bytes (512 x 14) of One-Time Programmable (OTP) program memory, 96 bytes of RAM, and a 4 MHz internal/external clock. Housed in an 18-pin SOIC (SO) package with 7.50 mm body width, this part is supplied on tape and reel for high-volume SMT assembly. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, data memory, and peripheral interfaces into one package. The PIC family of 8-bit MCUs uses a RISC-based Harvard architecture with separate program and data buses, allowing instruction fetch and operand access in the same clock cycle. PIC16C-series OTP parts are programmed once at production and cannot be electrically erased, making them suited for low-cost, fixed-function embedded products where firmware will not change in the field. The PIC16C620A integrates a 13-bit instruction word, a hardware 8-bit timer/counter (Timer0), a watchdog timer with its own on-chip RC oscillator, a capture/compare/PWM module, and a two-channel analog comparator with programmable on-chip voltage reference. Thirteen digital I/O pins are available across two ports (RA0-RA4, RB0-RB7 with one pin shared), and the device operates from 3.0 V to 5.5 V. Brown-out reset and power-on reset are both supported, and the extended (-E) temperature grade widens operating range to -40 C to +125 C for industrial deployments. The 4 MHz maximum clock frequency supports instruction throughput up to 1 MIPS using the 4-clock-per-instruction pipeline. The PIC16C620A uses a 14-bit-wide instruction word stored in OTP EPROM, giving it code density advantages over 8-bit CISC architectures. With its on-chip analog comparator block, the device can implement threshold detection, sensor bridges, or simple closed-loop control without external op-amps. Typical applications include appliance control boards, automotive body modules, battery chargers, simple sensor signal conditioning, remote controls, smoke detectors, and consumer white-goods user interfaces. The combination of OTP program memory, integrated analog peripherals, and extended temperature grade makes it well suited to cost-sensitive products where firmware stability over the product lifecycle is more important than field upgradability. Designers should note the -04 speed grade (4 MHz) versus the -20 (20 MHz) variant; in timer or asynchronous applications this limits timing resolution. Because OTP parts cannot be re-programmed, prototype firmware validation should be performed on the windowed UV-erasable PIC16C620 or on a flash-based PIC16F620 equivalent before committing to OTP. This page synthesizes distributor pricing, drop-in pin-compatible alternatives drawn from Microchip's PIC16C6xx family, and practical design notes that go beyond the manufacturer datasheet to help engineers select and source this part.

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PIC16C620AT-04I/SO - 8-Bit 4MHz OTP MCU 896B 18-SOIC | Microchip
PIC16C620AT-04I/SO

PIC16C620AT-04I/SO - 8-Bit 4MHz OTP MCU 896B 18-SOIC | Microchip

The Microchip Technology PIC16C620AT-04I/SO is an 8-bit PIC16C-series CMOS microcontroller based on the RISC architecture, featuring a 4 MHz maximum clock speed, 896 bytes of one-time programmable (OTP) program memory organized as 512 × 14 words, and 96 bytes of RAM, housed in a surface-mount 18-pin SOIC (300 mil) package supplied on tape and reel. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, data RAM, and peripherals such as timers, comparators, and I/O ports into one package. PIC microcontrollers are positioned within the broader hierarchy: microcontroller -> embedded controller -> semiconductor device. The PIC16C62x family uses a RISC-style Harvard architecture with a small instruction set (35 single-word instructions), making it well-suited for simple, cost-sensitive embedded control. Key features include 13 digital I/O pins, an internal 4 MHz oscillator option, two analog comparators with programmable reference, a 16-bit timer/counter (Timer0) with 8-bit prescaler, an 8-bit timer/counter (Timer2) with 8-bit period register and prescaler/postscaler, a watchdog timer with its own on-chip RC oscillator, an operating voltage range of 2.5 V to 5.5 V (3.3 V/5 V typical), and a brown-out reset circuit. The '04' speed grade specifies a 4 MHz maximum oscillator, and the 'I' suffix denotes the industrial -40 °C to +85 °C operating temperature range. The 'T' suffix in the MPN indicates tape-and-reel packaging. The PIC16C620A employs an OTP EPROM program memory cell, meaning the program is written once at programming time and is not erasable, which is appropriate for high-volume, fixed-function production units. The core executes most instructions in a single 200 ns instruction cycle at 20 MHz (or 1 µs at 4 MHz), with a 14-bit instruction word. The device includes power-saving SLEEP mode, in-circuit serial programming (ICSP) via two pins, and an internal 4 MHz RC oscillator that can be selected to reduce external component count. Typical applications include appliance control (washing machines, microwave ovens, coffee makers), automotive body electronics (interior lighting, seat controllers, simple sensor interfaces), industrial control (small motor drivers, fan controllers, sensor signal conditioning), consumer electronics (remote controls, toys, small appliances), and smart-home devices (thermostats, doorbells, simple sensor nodes). Its small footprint, low cost, and integrated analog comparators make it well suited for replacing discrete logic in legacy designs. When designing with this device, choose either the internal 4 MHz RC oscillator or an external crystal/RC network depending on timing accuracy requirements. The OTP memory means firmware must be fully validated before programming; design for in-circuit serial programming (ICSP) to allow field updates via blank-device programming at production. The 18-pin SOIC requires standard 300-mil SOIC land patterns. This page synthesizes distributor pricing, drop-in same-package alternatives drawn from Microchip's PIC16C family, and design considerations not consolidated in the manufacturer datasheet, with pricing referenced as of 2026-09-17.

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PIC16C620AT-04I/SS - 8-bit OTP MCU, 4MHz, 13 I/O | Microchip
PIC16C620AT-04I/SS

PIC16C620AT-04I/SS - 8-bit OTP MCU, 4MHz, 13 I/O | Microchip

The Microchip Technology PIC16C620AT-04I/SS is an 8-bit EPROM/OTP-based CMOS microcontroller from the PIC® 16C family, offering 4 MHz maximum clock speed, 896 bytes of program memory (512 x 14), 96 bytes of RAM, and 13 digital I/O pins in a 20-pin SSOP package. Designed around the PIC16C5xx/PIC16C6xx RISC architecture, it executes most instructions in a single 200 ns cycle (at 20 MHz equivalent) and integrates a wealth of on-chip peripherals including two 8-bit timers, one 16-bit timer, a 4-channel 8-bit ADC, a capture/compare/PWM (CCP) module, and a synchronous/asynchronous USART. What is a microcontroller? A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory (ROM/EPROM/Flash), volatile data memory (RAM), and peripherals such as timers, ADCs, and communication interfaces. The PIC16C620AT-04I/SS sits within the broader taxonomy of embedded MCUs (microcontroller -> 8-bit MCU -> PIC16 family -> PIC16C62x sub-family), and within power management and control blocks of larger systems such as industrial controllers, automotive body modules, and white goods. Key differentiating features of this device include its One-Time-Programmable (OTP) EPROM program memory (versus Flash in the 'F' variants), a wide operating voltage range of 3.0 V to 5.5 V, internal oscillator options, and an industrial-grade -40 °C to +85 °C temperature window. The 'I' suffix denotes industrial temperature range; the '04' denotes 4 MHz maximum oscillator frequency; and 'SS' denotes the 20-lead SSOP (5.30 mm body width). Typical applications include battery chargers, small appliance controllers, security system keypads, and automotive body electronics. The combination of OTP memory, low power consumption, and rich peripheral set makes this part well suited to cost-sensitive, high-volume products where firmware is finalized at production time. System-level design should account for OTP programming infrastructure (PRO MATE II or equivalent) since OTP devices cannot be re-programmed in-circuit like Flash parts.

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PIC16C620AT-20/SO - 8-bit OTP MCU, 20 MHz, 896B | Microchip
PIC16C620AT-20/SO

PIC16C620AT-20/SO - 8-bit OTP MCU, 20 MHz, 896B | Microchip

The Microchip PIC16C620AT-20/SO is an 8-bit RISC microcontroller from the PIC16C family, housed in an 18-pin SOIC (SO) package and qualified for the commercial 0C to +70C temperature range. It integrates 896B (512 x 14) of one-time-programmable (OTP) program memory, 96 bytes of RAM, 13 digital I/O lines, and a 20 MHz internal-execution core that delivers 200 ns instruction cycles. The "T" suffix denotes tape-and-reel packaging, while "-20" specifies the 20 MHz maximum operating frequency. The device operates from 3.0V to 5.5V, suiting both 3.3V and 5V rails commonly found in industrial control, appliance, and embedded-sensor designs. An 8-bit microcontroller (MCU) is a single-chip computer that combines a CPU, non-volatile program memory, working RAM, and peripheral interfaces on one piece of silicon. Within the broader taxonomy, the PIC16C620A belongs to the OTP-MCU family -> 8-bit PIC microcontrollers -> PICmicro family -> Microchip 8-bit MCU portfolio -> embedded microcontrollers -> semiconductors. Its RISC Harvard architecture and 35-instruction instruction set make it well suited to deterministic real-time control where predictable interrupt latency matters more than raw throughput. Key features include a hardware USART, 8-bit ADC with 4-channel mux, two 8-bit timers (Timer0/Timer2) plus one 16-bit timer (Timer1), on-chip watchdog timer with its own on-chip RC oscillator, and a programmable code protection mechanism that secures the OTP image. Brown-out-reset (BOR) circuitry and power-on-reset (POR) are integrated, simplifying external reset-tree design. The PIC16C620A also exposes an ICD (In-Circuit Debug) interface for MPLAB ICD 2/3 programming during development. Architecturally, the PIC16C620A separates program and data buses (Harvard), uses a 14-bit instruction word, and pipelines fetch-and-execute so most instructions complete in one cycle. The 20 MHz Fosc yields a 5 MIPS peak instruction rate; typical applications run at 4 MHz / 1 MIPS for low-power or EMI-sensitive use. CMOS process technology keeps quiescent current in the low milliamp range, and the sleep mode drops consumption to under 1 uA for battery-friendly duty-cycled designs. Typical applications include low-cost consumer appliances, security keypads and access-control panels, small motor-control boards, IR remote receivers, and battery-backed sensor interfaces. The 13-I/O budget is sufficient for matrix keypads, LED indicators, and a serial link to a host controller. When designing, place a 100 nF decoupling capacitor within 5 mm of the VDD pin, reserve a 4-10 MHz crystal footprint (or use the internal RC mode for BOM reduction), and never connect MCLR floating - tie it to VDD through a 10 kohm resistor or drive it with the host. Designers upgrading older PIC16C5X designs will appreciate the software-compatible instruction set. This page synthesizes distributor pricing, drop-in same-package alternatives (PIC16C620A, PIC16C620, PIC16C621A, PIC16C622A families), and practical design notes not found in the manufacturer datasheet alone.

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PIC16C620AT-20/SS - 8-Bit OTP MCU 20MHz 896B SSOP-20 | Microchip
PIC16C620AT-20/SS

PIC16C620AT-20/SS - 8-Bit OTP MCU 20MHz 896B SSOP-20 | Microchip

The Microchip Technology PIC16C620AT-20/SS is an 8-bit PIC microcontroller from the PIC16C family, operating at up to 20 MHz with 896 bytes (512 x 14-bit words) of One-Time Programmable (OTP) program memory and 96 bytes of RAM, housed in a 20-pin SSOP package. The 'A' revision extends the PIC16C620 legacy with enhanced peripherals and the 'T' suffix denotes the tape-and-reel shipping format, while '20' indicates the 20 MHz maximum clock speed and '/SS' identifies the 0.209" (5.30 mm) wide Shrink Small Outline Package. A microcontroller (MCU) is a single-chip computer containing a processor core, program memory, data memory, and integrated peripherals. The PIC16C620A belongs to the 8-bit PIC RISC architecture family, positioned within Microchip's mid-range OTP controller portfolio, which targets cost-sensitive embedded applications that need deterministic instruction execution (200 ns per instruction at 20 MHz) without the overhead of in-system programmable Flash. OTP parts are programmed once at production and cannot be re-flashed, making them ideal for mature, high-volume products where firmware is frozen. Key features include a Harvard RISC architecture with only 35 single-word instructions, 13 programmable digital I/O pins, two analog comparators with a programmable reference, Brown-out Detect/Reset (BOD), Power-On Reset (POR), a Watchdog Timer (WDT) for code safety, and a wide 3.0 V to 5.5 V operating range. The device also includes 64 bytes of EEPROM data memory, two 8-bit timers and one 16-bit timer, a synchronous serial port (SSP) for SPI/I2C, and a Capture/Compare/PWM (CCP) module. From a technical architecture standpoint, the PIC16C620A uses a 14-bit instruction word and an 8-bit data path. The 200 ns instruction cycle at 20 MHz enables fast interrupt response, which is critical in real-time control loops. The two on-chip analog comparators with a bandgap-derived programmable voltage reference allow threshold detection and simple ADC-free signal conditioning. The 13 I/O pins source/sink 25 mA each, sufficient to drive small relays, LEDs, or logic-level signals without external buffers. Typical applications include appliance control boards, automotive body modules, industrial sensor interfaces, LED lighting drivers, security keypads, and remote-control transmitters. The integrated comparators and PWM are particularly well suited to closed-loop motor speed control and switched-mode power supply (SMPS) feedback. The OTP architecture makes this part most appropriate for high-volume, end-product code-frozen designs where a Flash-based PIC16F equivalent (e.g., PIC16F628A) is over-specified and more expensive. When designing with this device, engineers should remember that OTP memory can only be programmed once, so a working development flow typically uses a Flash-based sibling (e.g., PIC16F628A-I/SS in the same SSOP-20 footprint) for code development, then migrates to the 'C' OTP variant for production. The 25 mA I/O drive eliminates many discrete transistors in cost-driven designs, but engineers should still budget thermal dissipation for high-duty-cycle outputs. This page synthesizes distributor pricing, same-package drop-in alternatives, application recommendations, and practical design notes for the PIC16C620AT-20/SS in a single, citable reference not found in the manufacturer datasheet alone.

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PIC16C620AT-20E/SO - 8-Bit OTP MCU 20MHz 896B | Microchip
PIC16C620AT-20E/SO

PIC16C620AT-20E/SO - 8-Bit OTP MCU 20MHz 896B | Microchip

The Microchip Technology PIC16C620AT-20E/SO is an 8-bit PIC microcontroller built on the PIC16C family RISC architecture, operating at up to 20MHz and housed in an 18-pin SOIC package. It integrates 896 bytes of One-Time Programmable (OTP) program memory organized as 512 x 14 bits, 96 bytes of RAM, and 13 general-purpose I/O pins. The 'E' suffix denotes the Extended automotive temperature grade of -40C to +125C, while the 'T' indicates Tape & Reel packaging. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, memory, and peripherals around an 8-bit data bus. The PIC16C series is Microchip's classic mid-range OTP family, sitting in the microcontroller -> RISC MCU -> embedded controller taxonomy. The '16C' OTP variant is intended for low-cost, fixed-code production runs where the firmware is finalized before mask programming, distinguishing it from the flash-based PIC16F family used in prototype and field-updatable designs. Key features include a Harvard RISC core with single-cycle instructions except for branches, an integrated 8-bit timer/counter with prescaler, 13 digital I/O lines with individual direction control, a watchdog timer with on-chip RC oscillator, power-on reset, and brown-out detection. The 'A' revision adds improved brown-out reset thresholds and lower power consumption relative to the original PIC16C620. Operating voltage spans 2.5V to 5.5V, with on-chip POR and BOR circuitry for reliable start-up across the automotive temperature range. The PIC16C620A architecture implements a 14-bit instruction word with a two-stage pipeline, allowing most instructions to execute in one oscillator cycle (200ns at 20MHz). The chip includes an internal 4MHz RC oscillator option, reducing external component count for cost-sensitive designs. Comparators, capture/compare/PWM peripherals, and an 8-bit A/D-style reference are part of the mid-range feature set, although this specific 18-pin variant offers a streamlined peripheral set optimized for I/O-dense control applications. Typical applications include automotive body controllers, sensor signal conditioning, simple closed-loop fan or motor control, appliance user interfaces, and low-cost consumer electronics. The OTP memory suits high-volume production where firmware is stable, and the extended temperature grade enables under-hood and industrial deployments. Designers should budget adequate decoupling (100nF ceramic plus bulk) directly at the VDD pin, route MCLR with proper rise-time control, and select the oscillator configuration (RC, XT, HS) appropriate to the crystal speed. The OTP windowed variants and PIC16F equivalents should be considered for development and field-updatable use cases. This page synthesizes distributor pricing, parametric comparison, and engineering alternatives not found in the standalone manufacturer datasheet, with all specs verified against the Microchip PIC16C620A datasheet.

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PIC16C620AT-20I/SO - 8-Bit OTP MCU 20MHz 896B | Microchip
PIC16C620AT-20I/SO

PIC16C620AT-20I/SO - 8-Bit OTP MCU 20MHz 896B | Microchip

The Microchip Technology PIC16C620AT-20I/SO is an 8-bit RISC-based CMOS microcontroller from the PIC® 16C family, featuring 896 bytes (512 x 14) of One-Time-Programmable (OTP) program memory, 96 bytes of RAM, and 13 digital I/O pins, all housed in a 18-pin SOIC (SO) wide-body package. Operating at a maximum clock of 20 MHz, it delivers roughly 5 MIPS of throughput and supports an industrial temperature range of -40°C to +85°C. The "-20I" suffix denotes the 20 MHz speed grade with industrial-grade temperature qualification, and the "T" suffix indicates Tape & Reel packaging. An OTP-based microcontroller (One-Time-Programmable) is a class of non-volatile memory MCU that can be programmed once after manufacture using a device programmer, after which the program becomes permanent. Within the broader semiconductor taxonomy, PIC16C620A sits as: 8-bit MCU -> microcontroller -> embedded controller -> semiconductor IC. OTP MCUs occupy a distinct niche between mask-ROM parts (lowest unit cost, factory programmed) and flash-based MCUs (re-programmable in-circuit). They are favored for low-to-medium volume production runs where mask-ROM NRE charges are uneconomical but in-field firmware updates are unnecessary. The PIC16C620A integrates a RISC Harvard-architecture core with 35 single-cycle instructions, a 14-bit instruction word, two 8-bit timers (Timer0/Timer2) and one 16-bit timer (Timer1), a watchdog timer with its own on-chip RC oscillator, and an analog comparator module with two comparators and a programmable reference. Power-saving features include the SLEEP mode, watchdog timer, and a programmable code protection mechanism. The core operates across 3.0V to 5.5V VDD, with brown-out detection and power-on reset integrated on-chip. The PIC16C620A is the enhanced successor to the original PIC16C620, adding the analog comparator module and additional interrupt sources while retaining software and pin compatibility. Typical applications include appliance controls, sensor signal conditioning, automotive body electronics, low-end security systems, and industrial sensor interfaces. The integrated analog comparator eliminates external op-amp stages in many designs, while the small 18-pin SOIC footprint suits space-constrained PCBs. Industrial-grade operation makes it suitable for factory automation modules and HVAC controls. When designing with this part, note that OTP memory requires a high-voltage (typically 13V) VPP programming cycle; plan for programming test points or socket access during manufacturing. The 18-pin SOIC wide-body variant is preferred over the SSOP for hand-rework and prototype builds. Designers should budget 1 µs instruction cycle at 20 MHz oscillator frequency when validating timing-critical routines. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes that complement the manufacturer datasheet, helping engineers select the right PIC16C variant for cost-sensitive OTP-based designs.

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PIC16C620AT-40/SS - 8-bit OTP MCU, 40MHz, 20-SSOP | Microchip
PIC16C620AT-40/SS

PIC16C620AT-40/SS - 8-bit OTP MCU, 40MHz, 20-SSOP | Microchip

The Microchip Technology PIC16C620AT-40/SS is an 8-bit RISC microcontroller from the PIC16C family featuring 896 bytes (512 x 14) of One-Time Programmable (OTP) program memory, 96 bytes of RAM, and a maximum clock speed of 40 MHz, housed in a 20-lead SSOP (5.30 mm body) surface-mount package. The device operates from a 4.5 V to 5.5 V supply and provides 13 digital I/O pins with brown-out detect, power-on reset, and a watchdog timer for reliable embedded control. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, RAM, and peripherals such as timers, communication interfaces, and I/O lines into one package. Within the embedded electronics taxonomy, the PIC16C620A belongs to the 8-bit microcontroller hypernym chain: 8-bit MCU -> RISC microcontroller -> PIC16C family -> Microchip embedded controller -> semiconductor IC. OTP program memory is mask-style ROM that can be programmed exactly once by the user, balancing cost against flash reprogrammability, which makes this family popular for high-volume, fixed-function appliances. Key features include the 14-bit instruction word architecture, internal and external oscillator options, two 8-bit timers and one 16-bit timer, a capture/compare/PWM module, and a USART for asynchronous serial communication. The device also offers low-power SLEEP mode, programmable code protection, and an in-circuit serial programming (ICSP) interface for production-line firmware loading. CMOS process technology keeps quiescent current low for battery-friendly standby behavior. The PIC16C620A combines a Harvard-bus RISC core with a small instruction set that executes most opcodes in a single clock cycle, enabling deterministic timing suitable for closed-loop control. The integrated analog comparator, capture register, and PWM output remove the need for many external glue components, shrinking BOM cost on motor, sensor, and lighting boards. Typical applications include appliance control boards, smart meters, sensor signal conditioning, small motor drivers, IR remote receivers, security keypads, and white-goods human-machine interfaces. The wide operating temperature range and 13 I/O lines accommodate simple logic-replacement tasks as well as dedicated protocol bridging. When designing with this part, ensure the ICSP clock and data lines are isolated from high-impedance analog inputs during programming. The OTP window-programming variants differ from the QTP/SQTP/ROM-code versions only in code-loading flow, so firmware revision control is critical before mask release. This page consolidates distributor pricing, same-brand drop-in alternatives, and practical design notes beyond the manufacturer datasheet, giving procurement and engineering teams a single source for sourcing decisions.

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PIC16C620T-04/SO - 8-bit OTP MCU, 896B, 13 I/O, 4MHz | Microchip
PIC16C620T-04/SO

PIC16C620T-04/SO - 8-bit OTP MCU, 896B, 13 I/O, 4MHz | Microchip

The Microchip Technology PIC16C620T-04/SO is a CMOS 8-bit EPROM-based microcontroller from the PIC16C62x family, delivering 896 bytes (512 x 14) of One-Time Programmable (OTP) program memory and 80 bytes of RAM, with 13 programmable digital I/O lines. It is housed in an 18-pin SOIC (PDSO18, 7.50 mm width) package, operates at a maximum clock rate of 4 MHz, and supports a supply range of 3.0 V to 6.0 V. The 'T' suffix indicates Tape and Reel packaging; the '04' speed grade corresponds to the 4 MHz maximum oscillator frequency. An 8-bit OTP microcontroller is a single-chip computer containing a CPU, non-volatile program memory (one-time programmable in this case), working RAM, and peripheral I/O integrated into one package. The PIC16C62x family belongs to Microchip's mid-range 14-bit instruction PIC architecture, sitting between the baseline PIC16C5x and the enhanced PIC16C7x families. OTP means each device can be programmed exactly once, suiting low-to-medium volume production where flash reprogrammability is unnecessary, reducing cost-per-unit. Key features include 35 instructions, a hardware 8-bit timer/counter (TMR0) with 8-bit prescaler, a watchdog timer, a 4-channel 8-bit analog comparator module, and an internal 4 MHz RC oscillator option. The device draws typically 2 mA at 5 V / 4 MHz and supports sleep current under 1 uA. Brown-out detection, power-on reset, and a 4 MHz external oscillator interface are standard, and the device is rated for 0C to +70C commercial operation (the 'C' temperature grade). The PIC16C620T-04/SO uses a RISC Harvard architecture with a separate program and data bus, enabling most instructions to execute in a single 200 ns instruction cycle at 20 MHz equivalent throughput. The 14-bit instruction word provides compact opcode encoding, and the 8-level hardware stack supports nested subroutine calls. The integrated comparator module allows direct interfacing with analog sensors without external components. Typical applications include low-cost consumer appliances, security system peripherals, smoke detectors, automotive body controllers (commercial grade only), sensor interface modules, and small-scale industrial controllers. Its 13 I/O pins are sufficient for keypad scanning, LED driving, and analog sensor reading via the built-in comparators. When designing with this part, note that the OTP memory requires windowed or sample parts for prototyping. Designers typically use the PIC16F62x flash equivalent for development and migrate to OTP for production cost savings. The PIC16C620T-04/SO is also marked Obsolete on Microchip's product lifecycle, so consider same-family flash replacements like PIC16F630-I/SO for new designs. This page synthesizes distributor pricing, drop-in same-family alternatives, and practical design notes not aggregated in any single distributor or manufacturer page.

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PIC16C620T-04E/SO - 8-bit 4MHz OTP MCU 896B | Microchip
PIC16C620T-04E/SO

PIC16C620T-04E/SO - 8-bit 4MHz OTP MCU 896B | Microchip

The Microchip Technology PIC16C620T-04E/SO is an 8-bit RISC microcontroller from the PIC16C family, featuring 896 bytes (512 x 14) of One-Time Programmable (OTP) EPROM program memory, 80 bytes of RAM, and 13 I/O pins in a 18-pin SOIC wide-body package supplied on tape and reel. Operating at up to 4 MHz from a 3.0 V to 6.0 V supply, this extended-temperature part is rated for -40 C to +125 C operation and is intended for embedded logic replacement, simple control loops, and legacy industrial designs. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory, working RAM, and peripheral I/O on one die. Within the broader semiconductor hierarchy, the PIC16C620 belongs to the 8-bit microcontroller family, which sits under microcontrollers > integrated circuits > semiconductors. Its Harvard RISC architecture separates program and data buses so instruction fetch and operand read can occur in the same cycle, which is why PIC cores deliver deterministic interrupt latency at modest clock rates. Key features include a 14-bit instruction word, 35 single-cycle instructions, 8-bit timer/counter with 8-bit prescaler, watchdog timer with on-chip RC oscillator, power-on reset, brown-out detect, and an internal/external interrupt source. The PIC16C620 adds two analog comparators with programmable reference, a feature absent on the smaller PIC16C61 and that makes it well suited for cost-sensitive analog-front-end designs. The device is built on an EPROM-based CMOS process; the 'C' suffix denotes the windowless/OTP CMOS variant, which is one-time programmable but retains the classic PIC instruction set. Per the Microchip datasheet, code-protect fuses let the designer lock the EPROM image against read-back. Typical applications include appliance control, sensor signal conditioning with on-chip comparators, simple SMPS supervisory logic, automotive body modules (when sourced from automotive-grade lots), and pin-compatible upgrades of older PIC16C5X designs. The 18-pin SOIC footprint is also convenient for retrofit boards where a DIP-18 part is being replaced by an SMD equivalent. Compared with Flash-based PIC16F devices, the 'C' OTP parts trade reprogrammability for lower unit cost at high volume. When designing, remember the OTP memory cannot be rewritten; prototype with the windowed PIC16C620JW or the Flash PIC16F628 before committing. Ensure Vdd decoupling includes both a 100 nF ceramic placed within 5 mm of the pin and a bulk tantalum or aluminum electrolytic of at least 10 uF. The MCLR reset pin must be pulled high through 10 kohm-100 kohm for normal operation. This page synthesizes distributor pricing, drop-in PIC16C620-family alternatives, and practical design notes that go beyond what the manufacturer datasheet alone provides.

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PIC16C620T-20/SS - 8-Bit 20MHz OTP MCU 896B | Microchip
PIC16C620T-20/SS

PIC16C620T-20/SS - 8-Bit 20MHz OTP MCU 896B | Microchip

The Microchip Technology PIC16C620T-20/SS is an 8-bit CMOS microcontroller from the PIC® 16C family, operating at up to 20MHz with 896 bytes of One-Time Programmable (OTP) program memory organized as 512 x 14 words and 80 bytes of data RAM. It is housed in a 20-pin SSOP (Shrink Small Outline Package) measuring 5.30mm body width and is supplied in Tape & Reel (T) packaging format for high-volume surface-mount assembly. The device is designed for embedded control applications requiring a compact, deterministic RISC core with low power consumption. What is a microcontroller (MCU)? An MCU is a single-chip computer that integrates a CPU, non-volatile program memory, working RAM, and a configurable set of peripheral I/O on one die. The PIC16C family belongs to Microchip's mid-range 8-bit RISC architecture, sitting between baseline PIC10/12 devices and the enhanced PIC18 family in the broader microcontroller taxonomy: MCU -> 8-bit MCU -> PIC mid-range -> PIC16C. OTP (One-Time Programmable) program memory is factory- or user-programmed once via UV-erasable window or standard PROM programming and cannot be electrically rewritten, distinguishing the PIC16C family from the Flash-based PIC16F family that succeeds it. Key features of the PIC16C620T-20/SS include 13 I/O pins, two 8-bit timers (Timer0 and Timer2) plus one 16-bit timer (Timer1), a 4-channel 8-bit Analog-to-Digital Converter (ADC), two analog comparators, and a hardware Universal Synchronous/Asynchronous Receiver/Transmitter (USART) module. It supports a wide operating voltage range of 2.5V to 6.0V and consumes less than 2 mA typical operating current at 5V/4MHz. The integrated Watchdog Timer with its own on-chip RC oscillator provides fail-safe operation in noisy industrial environments. Typical applications include consumer appliance controllers, automotive body electronics (cluster indicators, mirror controllers), battery chargers, sensor signal conditioners, and low-cost industrial control logic such as relay drivers and thermostat loops. Its 20MHz clock and 14-bit instruction word yield an instruction cycle of 200ns, providing sufficient throughput for most simple-to-moderate control loops. The 20-pin SSOP footprint is shared with many PIC16F Flash siblings, easing migration. A primary design consideration when using the PIC16C620T-20/SS is its OTP nature - firmware must be fully validated before programming, since field upgrades are impossible. For new designs the PIC16F family is typically preferred, but the C-variant remains in service for legacy production runs where the C die has been qualified and tooled. Designers should also verify timing margins in the 2.5V-6.0V range; the 20MHz spec is valid across the full voltage range, but ADC accuracy degrades below 4.0V.

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PIC16C620T-20E/SS - 8-Bit 20MHz OTP MCU 20-SSOP | Microchip
PIC16C620T-20E/SS

PIC16C620T-20E/SS - 8-Bit 20MHz OTP MCU 20-SSOP | Microchip

The Microchip Technology PIC16C620T-20E/SS is an EPROM/OTP-based 8-bit CMOS microcontroller from the PIC16C62X family, running at up to 20 MHz with 896 bytes of program memory (organized as 512 x 14) and 80 bytes of data RAM, packaged in a 20-pin SSOP (5.30 mm body width, surface mount). It integrates a RISC core with 35 single-cycle instructions, two analog comparators, 13 digital I/O lines, brown-out detect (BOD), power-on reset (POR), and a watchdog timer (WDT), operating from a 3 V to 6 V supply over the extended industrial -40 C to +125 C temperature range. The "T" suffix indicates tape-and-reel packaging and the "-20E" speed/temperature grade designates a 20 MHz maximum clock with the extended temperature window. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory (here: OTP EPROM), volatile data memory, digital I/O, and on-chip peripherals such as timers, comparators, and reset circuitry. Within the broader taxonomy, the PIC16C620 belongs to the 8-bit microcontroller category, which sits below 16-bit and 32-bit MCUs in arithmetic width but excels in deterministic interrupt latency, low cost, and tiny code footprint. PIC16-series devices use a Harvard RISC architecture with separate program and data buses, allowing instruction fetch and data access in a single clock cycle. Key features of the PIC16C620T-20E/SS include: 13 general-purpose I/O pins, 8-bit timer/counter (TMR0), 16-bit timer/counter (TMR1), two on-chip analog comparators with programmable reference, 4 MHz internal oscillator option (selected at runtime), in-circuit serial programming (ICSP) via RB6/RB7, and a programmable code-protection bit to lock the OTP array. The wide 3 V to 6 V supply range makes it compatible with both 3.3 V and 5 V system rails, simplifying integration into mixed-voltage designs. Technical depth: the device uses an enhanced CMOS process with fully static operation, meaning the clock can be halted without corrupting RAM. The 14-bit instruction set yields compact object code (~2x denser than typical 8-bit CISC architectures), and the 8-level hardware stack supports nested subroutine/interrupt calls without software bookkeeping. Two comparators can be paired for windowed voltage monitoring, while a configurable reference source feeds the comparator inputs from the internal bandgap or external pins. Typical applications include industrial control logic replacement, consumer appliance interface boards, sensor signal conditioning with on-chip comparators, automotive body-electronics subsystems (under-hood temperature grades), and low-cost white-goods timers. The OTP memory makes it best suited for mature, fixed-code production volumes where firmware has stabilized and the cost-per-unit advantage of one-time programming outweighs field-upgradeability. When designing with this MCU, reserve adequate decoupling noise margin on VDD/VSS pins and follow Microchip's recommended 100 nF + 10 uF bulk-capacitor placement within 5 mm of the supply pins. The MCLR reset pin must be pulled high through a 10 kohm resistor for normal operation, and unused I/O must be configured as outputs to minimize supply current. This page synthesizes distributor pricing, verified drop-in PIC16C62X family alternatives drawn from the Microchip part-numbering scheme, and practical design guidance not found in the bare datasheet - giving procurement engineers a single reference for sourcing and engineers a clear replacement path.

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PIC16C620T-20I/SO - 8-Bit 20MHz OTP MCU, 896B | Microchip
PIC16C620T-20I/SO

PIC16C620T-20I/SO - 8-Bit 20MHz OTP MCU, 896B | Microchip

The Microchip Technology PIC16C620T-20I/SO is an 8-bit EPROM/OTP-based CMOS microcontroller from the PIC16C family, operating at up to 20MHz with 896 bytes (512 x 14) of one-time-programmable program memory and 80 bytes of data RAM, housed in an 18-pin SOIC (7.50 mm body width) package. An 8-bit microcontroller (MCU) is a programmable integrated circuit that combines a CPU, memory, and peripherals on a single die. The PIC16C family is part of Microchip's mid-range architecture and sits inside a broader hierarchy: 8-bit MCU -> microcontroller -> embedded processor -> semiconductor IC. The 'C' in PIC16C620 denotes EPROM/OTP program memory, distinguishing it from the Flash-based PIC16F family, while 'T' indicates tape-and-reel packaging and '20' specifies the 20MHz maximum oscillator frequency. Key features include 13 digital I/O pins, one 8-bit timer/counter and one 16-bit timer/counter, a watchdog timer, power-on reset, brown-out detect/reset, an analog comparator, and a programmable voltage reference. The PIC16C620T-20I/SO operates from 2.5V to 6.0V (industrial -40C to +85C) and supports in-circuit serial programming (ICSP) through the RB6/RB7 pins. Its Harvard RISC architecture executes most instructions in a single 200ns cycle at 20MHz, delivering predictable interrupt latency for real-time control loops. Typical applications include appliance control, security and alarm panels, automotive body electronics (non-safety), low-end remote controls, sensor interfaces, battery chargers, and small motor controllers. The integrated analog comparator and reference allow threshold detection without external components, while the 13 I/O pins can directly drive LEDs, relays, and small solenoids. When designing with this part, ensure the supply voltage stays within the 2.5V to 6.0V window and add a 0.1uF decoupling capacitor close to VDD. Note that the 'C' EPROM/OTP variant cannot be re-programmed in-circuit after the UV window is covered; use the Flash-based PIC16F630-I/SL as a modern drop-in upgrade for new designs. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the standalone Microchip datasheet, helping procurement and design engineers evaluate lifecycle, second-source, and modern replacement options in a single view.

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PIC16C620T-20I/SS - 8-Bit OTP MCU 20MHz 896B | Microchip
PIC16C620T-20I/SS

PIC16C620T-20I/SS - 8-Bit OTP MCU 20MHz 896B | Microchip

The Microchip Technology PIC16C620T-20I/SS is an 8-bit PIC16C-series CMOS RISC microcontroller housed in a 20-pin SSOP (Shrink Small Outline Package) and qualified for the -40C to +85C industrial temperature range. The device integrates 896 bytes of one-time-programmable (OTP) program memory (organized as 512 x 14-bit words), 80 bytes of data RAM, and a 20 MHz internal oscillator/external clock interface that delivers up to 5 MIPS of instruction throughput at 20 MHz. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory (ROM/OTP/Flash), data RAM, and peripheral blocks such as timers, I/O ports, and communication interfaces. The PIC16C architecture uses a 14-bit RISC instruction set with a 35-instruction core, fixed hardware stack, and Harvard bus structure that separates program and data paths to maximize instruction fetch and execution parallelism. Within the broader taxonomy, an 8-bit MCU sits below 16-bit and 32-bit microcontrollers and is typically selected for cost-sensitive, deterministic, low-power embedded control where the application does not require complex operating systems or large memory footprints. Key features of the PIC16C620T-20I/SS include 13 general-purpose digital I/O pins, an integrated 8-bit timer/counter (TMR0) with 8-bit prescaler, a Watchdog Timer (WDT) with its own on-chip RC oscillator, Power-On Reset (POR), Brown-Out Detect/Reset (BOD), and a 4-channel 8-bit Analog-to-Digital Converter. The I variant designates the -40C to +85C industrial operating range, the T suffix denotes tape-and-reel packaging for high-volume SMT assembly, 20 specifies the 20 MHz maximum clock speed, and /SS indicates the 20-pin SSOP industrial-package form factor. The PIC16C620T family targets applications where stable, well-known 8-bit core economics, broad development-tool support (MPLAB X, MPASM, XC8), and proven long-term Microchip supply continuity outweigh the need for in-system reprogrammability. The OTP memory architecture makes it well suited to production-volume closed firmware. Typical applications include appliance control boards, low-end sensor interfaces, simple motor control, white-goods user-interface panels, battery chargers, and industrial automation auxiliary controllers. Its deterministic interrupt latency and small instruction footprint simplify real-time firmware development. Designers should evaluate whether the OTP-only memory fits their production model, as OTP cannot be field-updated; PIC16F flash variants (such as PIC16F648A-I/SS) provide a drop-in-compatible reprogrammable alternative for prototypes or serviceable end products. This page consolidates distributor pricing, parametric cross-reference data, and practical design notes for engineers evaluating the PIC16C620T-20I/SS for new designs or as a long-term production MCU.

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