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PIC16C58BT-04I/SS

PIC16C58BT-04I/SS - 4MHz 8-Bit OTP MCU, 3KB | Microchip

The Microchip Technology PIC16C58BT-04I/SS is an EPROM/ROM-based 8-bit CMOS microcontroller from the PIC16C5X family, featuring 3KB (2K x 12) of One-Time-Programmable (OTP) program memory, 73 bytes of RAM, and 12 I/O pins in a 20-pin SSOP package. It operates at a maximum clock speed of 4MHz across a 3.0V to 5.5V supply range and is built on a fully-static CMOS process. The device includes essential on-chip peripherals such as a Power-On Reset (POR), Watchdog Timer (WDT), and supports multiple external oscillator modes including RC, XT, LP, and HS configurations. A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory, data memory, and integrated peripherals. The PIC16C5X family belongs to the broader category of 8-bit microcontrollers within the embedded semiconductor hierarchy (MCU -> microcontroller -> embedded processor -> semiconductor IC). These devices target cost-sensitive, deterministic control applications where predictable interrupt latency and low power consumption are more important than raw computational throughput. OTP program memory is programmed once during production and cannot be erased, making the PIC16C58B family ideal for high-volume, fixed-function appliances where firmware is finalized at build time. Key differentiating features include the 12-bit instruction word architecture (giving 2K x 12 = 3KB program space), the Harvard bus architecture that allows simultaneous instruction and data fetches, and the industrial-grade -40C to +85C operating temperature range denoted by the I suffix. The 4MHz maximum clock combined with a 4-cycle-per-instruction timing yields a 1 MIPS instruction throughput. The device also features a 8-bit wide data path, 7 special-function hardware registers, and a 2-level hardware stack for subroutine nesting. Typical applications include consumer appliances, automotive body electronics (non-safety), remote controls, security sensor interfaces, low-end motor control, and battery-powered instrumentation. The PIC16C58B was historically used in keyboard encoders, infrared remote transmitters, and simple sensor signal conditioning circuits. When designing with this device, ensure your programmer supports the OTP windowed/standard programming algorithm and budget for the OTP-only limitation (no field reprogramming). For prototypes, consider the JW windowed ceramic package variant for UV-eraseable development cycles, then switch to PIC16C58BT-04I/SS for production. Decoupling capacitors of 0.1uF should be placed within 5mm of VDD, and unused I/O pins should be configured as outputs to minimize supply current. This page synthesizes distributor pricing (DigiKey, Octopart), drop-in alternatives including PIC16C58B-04I/SS and PIC16F506-I/SS, and practical design notes (POR timing, WDT configuration, oscillator selection) that complement the manufacturer datasheet for board-level integration planning.

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PIC16C58BT-20/SO

PIC16C58BT-20/SO - 8-Bit 20MHz OTP MCU 3KB | Microchip

The Microchip Technology PIC16C58BT-20/SO is an 8-bit RISC microcontroller from the PIC16C5X family, featuring 3KB (2K x 12) of One-Time Programmable (OTP) program memory, 73 bytes of RAM, and a maximum clock speed of 20 MHz, housed in an 18-pin SOIC (SO) package with gull-wing leads. It belongs to the older commercial-grade PIC16C OTP lineup that combines RISC architecture with EPROM-based code storage for cost-sensitive embedded designs. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, data RAM, and I/O peripherals. In the system hierarchy, it sits below 16-bit and 32-bit MCUs but above discrete logic ICs. OTP microcontrollers like the PIC16C58B are programmed once with the application code and cannot be re-flashed, making them a low-cost fit for high-volume, stable-firmware products where in-field updates are not required. Key features include 12 bidirectional I/O pins, a 12-bit instruction word optimized for compact code, an internal watchdog timer, power-on reset, and an operating voltage range of approximately 3.0V to 5.5V typical for the PIC16C5X family. The 20 MHz clock enables up to 5 MIPS throughput, and the device supports commercial temperature grade operation. OTP EPROM memory reduces per-unit cost versus flash parts, while the SOIC-18 package is suitable for automated surface-mount assembly on standard 300-mil boards. The PIC16C58B uses Microchip's classic 12-bit RISC core with a 33-instruction set, 2-level hardware stack, and Harvard architecture that separates program and data buses for deterministic instruction fetch. The device integrates 73 bytes of general-purpose RAM, 8-bit timer/counter, and an internal oscillator option depending on the configuration, providing sufficient peripherals for simple control tasks. Typical applications include appliance controllers, low-end remote controls, lighting ballasts, simple sensor signal conditioning, and other cost-sensitive embedded systems where deterministic 8-bit performance and OTP code storage are advantageous. The wide SO-18 footprint and Microchip's well-documented development toolchain (MPLAB, MPASM) accelerate time-to-market for engineers familiar with the PIC architecture. When designing with this device, ensure the ICSP programming interface is accessible before final board assembly because OTP memory cannot be re-programmed after packaging. Decoupling capacitors (typically 100 nF plus a bulk 10 uF) should be placed as close as possible to VDD and VSS pins to suppress switching noise. This page synthesizes distributor pricing, drop-in cross-family alternatives, and practical design notes not found in a standalone datasheet excerpt, helping engineers source and apply the PIC16C58BT-20/SO confidently.

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PIC16C58BT-20/SS

PIC16C58BT-20/SS - 8-Bit 20MHz 3KB OTP MCU | Microchip | SSOP-20

The Microchip Technology PIC16C58BT-20/SS is an 8-bit RISC EPROM/ROM-based CMOS microcontroller (MCU) featuring 3KB (2K x 12) of One-Time Programmable (OTP) program memory, 73 bytes of RAM, and a maximum operating frequency of 20MHz, housed in a 20-pin SSOP package with gull-wing leads. The part belongs to the PIC16C5X baseline family and operates from a 2.5V to 5.5V supply, delivering deterministic single-cycle instruction execution at up to 200ns per instruction. A microcontroller is a single-chip computer that integrates a CPU, program memory, working RAM, and peripheral I/O on one die. The 8-bit class targets cost-sensitive embedded control where deterministic timing and low power are valued over raw throughput; within that class the PIC16C5X family occupies the baseline tier, optimized for the smallest possible code size (12-bit instruction word) and the lowest unit cost. PIC microcontrollers sit inside the broader semiconductor hierarchy: MCU -> embedded processor -> digital IC -> semiconductor. Key features include 12 general-purpose digital I/O pins, an external oscillator interface (RC, XT, HS, LP modes), Power-On Reset (POR), Watchdog Timer (WDT), and a 3-deep hardware stack. The OTP memory allows one-time user programming for low-volume production, and the CMOS static design supports operation down to DC clock speeds. The 20-SSOP package offers a compact 0.65mm pitch footprint. Architecturally, the PIC16C58B uses a Harvard architecture with separate program and data buses, a 12-bit instruction word for code density, and a fully static core. The device has no integrated ADC, PWM, UART, or I2C peripherals, so connectivity is handled in software via bit-banged I/O. Power consumption is intrinsically low because unused peripherals draw zero current on the static CMOS design. Typical applications include low-cost consumer appliances, LED lighting controllers, remote-control transmitters, battery chargers, simple sensor interfaces, and industrial timers. The PIC16C58B is well suited to high-volume price-sensitive designs where on-chip analog and communication peripherals are not required. When designing with this part, plan for an external oscillator (crystal, ceramic resonator, or RC network) and provide proper decoupling (100 nF plus 10 uF bulk) near the VDD pins. Use the WDT and POR features to recover from software lockups. Note that OTP memory cannot be reprogrammed; for prototyping use the JW or windowed package. This page synthesizes distributor pricing, parameter comparison against drop-in alternatives in the same SSOP-20 footprint, and practical design notes that go beyond the manufacturer datasheet summary.

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PIC16C58BT-20E/SO

PIC16C58BT-20E/SO - 8-Bit 20MHz 3KB OTP MCU 18-SOIC | Microchip

The Microchip Technology PIC16C58BT-20E/SO is an 8-bit RISC microcontroller in the PIC® 16C family, delivering 20MHz maximum clock speed with 3KB (2K x 12) of One-Time Programmable (OTP) program memory and 73 bytes of RAM, housed in an 18-pin SOIC (0.295", 7.50mm width) package. The "T" suffix indicates tape and reel packaging, the "20" denotes 20MHz operation, the "E" suffix marks the extended temperature grade (-40°C to +125°C), and the "SO" indicates the 18-pin Small Outline IC package. An 8-bit OTP microcontroller is a low-cost, high-performance CMOS processor that integrates CPU core, program memory, working RAM, and digital I/O on a single die. OTP memory allows the device to be programmed exactly once after manufacture using a device programmer, making these parts ideal for high-volume, cost-sensitive products where firmware has stabilized. The PIC16C5X family, of which PIC16C58B is a member, uses a 12-bit wide instruction word delivering 2:1 code compression over competitive 8-bit microcontrollers. Key features include 12 I/O pins supporting digital input and output, a RISC architecture with 33 single-word instructions and 2 instruction cycle decoder, a wide 3.0V to 5.5V operating voltage range, and a hardware reset vector. The internal oscillator and timer architecture support simple embedded control loops without external crystal in many applications, reducing BOM cost. The PIC16C58B delivers up to 20MHz instruction throughput, translating to approximately 5 MIPS performance for tight control loops. The 12-bit instruction width and Harvard architecture separate program and data memory paths, allowing simultaneous fetch and execute. 73 bytes of general-purpose RAM accommodate small data sets for sensor monitoring, simple user interfaces, and basic state machines. With 12 I/O pins arranged on an 18-pin SOIC footprint, the device fits compact PCB layouts while retaining sufficient I/O for switching, sensing, and indicator control. Typical applications include automotive body controllers, appliance control boards, security and access control panels, simple LED lighting controllers, battery chargers, and industrial sensor interfaces. The extended temperature grade (-40°C to +125°C) makes this part specifically suited to under-hood automotive modules, outdoor HVAC controls, and factory-floor sensor conditioning. The OTP memory model suits high-volume production runs where firmware revisions are infrequent and BOM cost dominates. When designing with this device, ensure the operating voltage falls within 3.0V to 5.5V and respect the absolute maximum ratings. Programming must occur before PCB assembly using a Microchip-compatible device programmer; OTP parts cannot be reprogrammed. Designers migrating to flash-based parts should consider PIC16F58 or PIC16F182x family replacements that share similar peripheral architecture. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the bare manufacturer datasheet. Engineers can use the comparison_table to verify pin-compatible drop-in choices before committing to a PCB revision.

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PIC16C58BT-20E/SS

PIC16C58BT-20E/SS - 8-bit 20MHz 3KB OTP MCU | Microchip SSOP-20

The Microchip PIC16C58BT-20E/SS is an 8-bit EPROM/ROM-based CMOS microcontroller from the PIC16C5X family, featuring a 20 MHz core clock, 3 KB (2K x 12) of one-time programmable (OTP) program memory, and 73 bytes of RAM, housed in a 20-pin SSOP (5.30 mm) package. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, RAM, non-volatile program memory, and peripherals. PIC16C5X devices belong to the PIC microcontroller family (Peripheral Interface Controller), classified as RISC microcontrollers -> 8-bit MCU -> microcontroller -> embedded computing -> semiconductor. The PIC16C5X family uses a RISC architecture with 33 single-word/single-cycle instructions, achieving roughly 2:1 code compression versus competitive 8-bit MCUs in its class. Key features include a 12-bit instruction word, 8-level hardware stack, 4 oscillator selections (RC, XT, HS, LP), 12 I/O pins, a watchdog timer with on-chip RC oscillator, and a programmable code protection mechanism. The OTP program memory is well suited to low-volume production and prototype runs that need to mimic mask-ROM cost structure without NRE charges. The PIC16C58BT employs a fully static CMOS design with low power consumption suitable for battery-powered or sleep-dominated applications. The 20 MHz clock rate delivers 5 MIPS throughput (1 instruction per cycle), more than adequate for control loops, simple communication, sensor sampling, and user-interface glue logic. The architecture separates program and data buses (Harvard), letting the CPU fetch instruction and operand in the same cycle. Typical applications include appliance control, smart sensor fans, IoT edge nodes, automotive body electronics, industrial control, white-goods user interfaces, and consumer electronics. Designers select this part when cost is paramount and reprogrammability in-circuit is not required. When designing with this part, account for OTP (one-time-programmable) memory: firmware must be fully validated before commit. The 'E' suffix indicates the extended industrial temperature range (-40C to +125C), making it appropriate for harsh-environment deployments. This page synthesizes distributor pricing, drop-in alternatives, and design guidance compiled from the Microchip PIC16C58BT datasheet and authorized distributor listings.

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PIC16C58BT-20I/SO

PIC16C58BT-20I/SO - 8-Bit 20MHz 3KB OTP MCU | Microchip

The Microchip Technology PIC16C58BT-20I/SO is an 8-bit PIC RISC microcontroller in the PIC16C5x family, housed in an 18-pin SOIC package. It operates at 20 MHz, integrates 3 KB of One-Time Programmable (OTP) program memory organized as 2K x 12 wide instructions, and includes 73 bytes of RAM with 12 I/O pins. Industrial temperature range (-40C to +85C), 5 V supply. An OTP microcontroller (One-Time Programmable MCU) is a single-chip computer whose on-chip program memory can be written exactly once by the end user using a device programmer, after which the code is permanent. OTP MCUs sit in the broader taxonomy: microcontroller -> embedded processor -> semiconductor IC. Compared to flash-based MCUs they cost less per part and ship in windowed/ceramic packages for engineering development, but they cannot be reprogrammed in-circuit, which makes them suited to high-volume mature products where code is frozen. Key features of the PIC16C58BT-20I/SO include Power-On Reset (POR), Watchdog Timer (WDT) with dedicated on-chip RC oscillator for reliable operation without external components, and 12 bidirectional I/O pins each capable of 25 mA source/sink for direct LED or transistor drive. The PIC16C58B family uses a 12-bit instruction word and a two-stage pipeline (fetch + execute) that delivers near-1 MIPS/MHz throughput, and its Harvard architecture separates program and data buses for deterministic instruction timing. Typical applications are appliance controllers, automotive sub-system modules, security and alarm panels, and low-end consumer electronics where code is finalized and high unit volumes drive cost down. The 25 mA I/O sink/source eliminates many driver transistors. Note that the 'B' suffix denotes the enhanced PIC16C58B die (vs. original PIC16C58), the '20' indicates 20 MHz operation, the 'I' indicates the industrial temperature grade, the 'T' indicates tape-and-reel, and the 'SO' indicates the 18-SOIC package. Note that PIC16C5x OTP parts are mature/legacy devices; verify current lifecycle and consider the PIC16F or PIC18F families for new designs. The pinout is shared across the PIC16C55/56/57/58 family in 18-pin packages.

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PIC16C58BT-20I/SS

PIC16C58BT-20I/SS - 8-Bit 20MHz 3KB OTP MCU | Microchip | SSOP-20

The Microchip Technology PIC16C58BT-20I/SS is an 8-bit RISC microcontroller from the PIC16C5x family, featuring 3KB (2K x 12) of One-Time-Programmable (OTP) EPROM program memory, 73 bytes of RAM, and 12 I/O pins, all housed in a 20-pin SSOP (0.209 inch / 5.30 mm width) surface-mount package. It operates from a 3V to 5.5V supply and runs at up to 20 MHz, making it well suited for cost-sensitive embedded control applications. What is a PIC16C5x microcontroller? The PIC16C5x family from Microchip Technology is a line of low-cost, high-performance, 8-bit fully static, EPROM/ROM-based CMOS microcontrollers that use a RISC architecture. It belongs to the broader category of microcontrollers (MCUs) within embedded processors, characterized by 12-bit wide instructions that provide 2:1 code compression over other 8-bit MCUs in its class. These devices target simple control tasks where deterministic execution and minimal external components are required. Key features include 33 single-word instructions, 2:1 code compression via 12-bit-wide opcodes, a wide operating voltage range of 3.0V to 5.5V, 12 CMOS bidirectional I/O pins, and an industrial temperature rating of -40C to +85C. The OTP EPROM memory enables rapid prototyping without mask charges, while the -20 speed grade guarantees 20 MHz operation across the full voltage and temperature range. The device employs a Harvard architecture with separate program and data buses, a two-stage pipeline, and a built-in oscillator that supports crystal, ceramic resonator, or external clock inputs. With only 33 instructions and a fixed reset vector, the PIC16C5x delivers deterministic interrupt-free operation suitable for hard real-time control loops. Typical applications include industrial automation sensors, consumer appliance controllers, simple motor control, battery chargers, security keypads, and low-cost IoT edge nodes. The wide 3V to 5.5V range allows direct operation from a single lithium cell or a 5V regulated rail. When designing with this MCU, note that OTP memory cannot be reprogrammed, so production code must be fully validated before programming. The 12-bit instruction width and lack of interrupts require firmware planning, but the small footprint and minimal external components make it ideal for volume-sensitive designs. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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PIC16C58BT-40/SO

PIC16C58BT-40/SO - 8-Bit 40MHz OTP MCU, 3KB | Microchip

The Microchip Technology PIC16C58BT-40/SO is a member of the PIC® 16C family of 8-bit, fully-static, EPROM/ROM-based CMOS microcontrollers. It features a 40 MHz maximum core clock, 3 KB of one-time-programmable (OTP) program memory organized as 2K × 12-bit words, and 73 bytes of data RAM. The device is housed in an 18-pin SOIC (Small Outline IC) package with gull-wing leads and a 7.50 mm body width. An 8-bit microcontroller (MCU) is a small, low-cost computing core that integrates a CPU, RAM, non-volatile program memory, and on-chip peripherals into a single IC. The PIC16C5X architecture sits inside the broader taxonomy of microcontrollers -> embedded controllers -> semiconductors, and is optimized for cost-sensitive, deterministic control tasks. The 12-bit wide instruction set delivers a 2:1 code compression advantage over other 8-bit MCUs in its class, reducing ROM requirements for a given feature set. Key features include 12 I/O pins, one 8-bit timer/counter with watchdog timer (WDT) function, Power-On Reset (POR), brown-out detection variants, a programmable code-protection mechanism, and an operating voltage range of 3.0 V to 5.5 V. The fully-static CMOS design eliminates the minimum clock frequency requirement, allowing the device to be clocked down to DC for low-power standby states. Typical applications for the PIC16C58BT-40/SO include appliance controls, security system panels, automotive sub-system controllers (non-safety), low-end sensor interfaces, and battery-powered consumer products. Its wide operating temperature range and OTP memory make it suitable for high-volume, code-stable embedded products. Designers should note that the OTP memory cannot be electrically erased or rewritten after programming; a windowed ceramic package variant (PIC16C58B-40/JW) is required for development and code iteration. Adequate decoupling (0.1 µF ceramic close to VDD/VSS) and an in-circuit serial programming (ICSP) header should be reserved on the PCB even when production programming is performed externally. This page synthesizes distributor availability, cross-brand and same-brand drop-in alternatives in the SOIC-18 footprint, and practical design notes not consolidated in the manufacturer datasheet.

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PIC16C58BT-40/SS

PIC16C58BT-40/SS - 8-bit 40MHz OTP MCU 3KB | Microchip

The Microchip Technology PIC16C58BT-40/SS is an 8-bit RISC microcontroller from the PIC16C5X family, featuring a 40 MHz maximum clock speed, 3 KB (2K x 12) of One-Time-Programmable (OTP) program memory, and 73 bytes of RAM, housed in a 20-pin SSOP (5.30 mm) package. The "T" suffix denotes tape and reel packaging, "40" denotes the 40 MHz speed grade, and "/SS" specifies the SSOP-20 package. A PIC microcontroller is a compact programmable logic device based on a Harvard-architecture RISC core. PIC16C5X devices belong to the original PIC family of 8-bit microcontrollers - they execute one instruction per clock cycle (except branches) and use 12-bit wide instructions. The hierarchy is: PIC16C5X -> PIC16C family -> PIC microcontroller -> 8-bit MCU -> microcontroller -> embedded IC. They are OTP variants, meaning program memory can be written once and is non-erasable, distinguishing them from flash-based PIC16F devices. Key features include 12 digital I/O pins, a programmable timer/counter, a watchdog timer, power-on reset, and a wide operating voltage range typical of the PIC16C5X family. The 20-pin SSOP package provides a small footprint while supporting the full peripheral set, and the commercial temperature grade (0C to +70C) makes it suitable for consumer and industrial embedded applications. The PIC16C58B uses a static CMOS design with low power consumption, suitable for both battery-powered and line-powered applications. Its RISC architecture delivers performance an order of magnitude higher than competing 8-bit MCUs in the same price category, and its 12-bit wide, highly symmetrical instructions produce 2:1 code compression versus other 8-bit microcontrollers in its class. Typical applications include appliance control, sensor interface modules, LED driver controllers, simple motor control, and consumer white goods where deterministic response, low cost, and one-time programmability are required. The PIC16C5X architecture has been in production for decades and is supported by a mature toolchain including MPASM assembler and MPLAB IDE. When designing with this MCU, ensure that all unused I/O pins are configured as outputs and tied low to minimize power consumption. Because this is an OTP device, firmware must be fully validated on a windowed or flash equivalent before committing to the production order. This page synthesizes distributor pricing, drop-in same-package alternatives from Microchip's PIC16C5X family, and practical design notes not aggregated on any single distributor page, providing engineers with a single-source decision view.

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PIC16C620-04/SO

PIC16C620-04/SO - 8-Bit 4MHz CMOS MCU, 896B OTP, 13 I/O | Microchip

The Microchip Technology PIC16C620-04/SO is an EPROM-based 8-bit CMOS microcontroller in the PIC16C family, delivering 4MHz CPU performance with 896 bytes (512 x 14) of One-Time-Programmable (OTP) program memory in an 18-pin SOIC (SO) gull-wing surface-mount package. The "04" speed suffix designates a 4 MHz oscillator domain, while the "/SO" suffix specifies the 18-lead small-outline IC package. A PIC microcontroller is a compact microcontroller unit (MCU) built on a Harvard-architecture Reduced Instruction Set Computer (RISC) core that integrates CPU, program memory, data RAM, and peripheral I/O on a single chip. PIC microcontrollers sit within the broader hierarchy of embedded processors -> microcontrollers -> 8-bit MCUs -> PIC16C family, and are widely used as the central controller in industrial, automotive, appliance, and consumer-electronic products. The PIC16C620 specifically belongs to Microchip's mid-range PIC16C5x/PIC16C6x lineage featuring OTP EPROM program memory, suitable for low-volume, cost-sensitive, or development-stage designs. An OTP device is programmed once and cannot be erased, which makes it ideal for fixed-function production units that do not require firmware updates. Key features of the PIC16C620-04/SO include 80 bytes of data RAM, 13 digital I/O pins, a watchdog timer, an 8-bit timer/counter (TMR0), and a power-on reset (POR) circuit. The device supports a wide operating voltage range, allowing it to operate from low-voltage battery systems as well as standard 5 V rails. Compared to flash-based PIC16F successors, the OTP PIC16C620 offers lower per-unit cost at higher volumes, with no field-upgrade capability. Typical applications for the PIC16C620-04/SO include low-cost remote control transmitters, small appliance controllers, security-system keypads, sensor-interface modules, and industrial timer modules. Designers transitioning legacy PIC16C620 designs to flash-based replacements typically migrate to PIC16F627A/628A/648A in the same 18-pin SOIC footprint for in-circuit re-programmability. When designing with this part, remember that OTP memory cannot be re-programmed - any firmware change requires a new device. For prototypes and field-updateable production, consider a flash-based PIC16F6xxA in the same 18-SOIC footprint.

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PIC16C620-04/SS

PIC16C620-04/SS - 8-Bit CMOS MCU, 4MHz, 896B OTP, SSOP-20 | Microchip

The Microchip Technology PIC16C620-04/SS is an EPROM-based 8-bit CMOS microcontroller belonging to the PIC® 16C family, packaged in a 20-pin SSOP (Shrink Small Outline Package) with 0.209 inch (5.30 mm) body width. The device operates at a maximum clock speed of 4 MHz and integrates 896 bytes of program memory (512 x 14 OTP), 80 bytes of data RAM, and 13 digital I/O pins. The "-04" speed suffix designates the 4 MHz maximum oscillator frequency, while the "/SS" suffix denotes the SSOP-20 industrial/commercial surface-mount package. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, RAM, non-volatile program memory, and I/O peripherals. Within the broader taxonomy, the PIC16C620 belongs to the EPROM-based sub-family of Microchip's mid-range PIC architecture, sitting between the baseline 12-bit core and the enhanced 14-bit core, and forms part of the legacy PIC16C5x/PIC16C6x/7x product tree. OTP (One-Time-Programmable) EPROM cells are used in place of flash, providing a cost-optimized solution for high-volume mature designs that are already past their development phase. Key features of the PIC16C620-04/SS include two analog comparators with programmable reference, a 5-channel 8-bit A/D converter (PIC16C620 variant), capture/compare/PWM modules, and a wide operating voltage range of 3.0 V to 6.0 V. The fully static CMOS design enables low power consumption (15 µA typical at 5 V/4 MHz and 1 µA typical at 3 V/32 kHz) and supports commercial (0°C to +70°C) and industrial (-40°C to +85°C) temperature grades. A built-in power-on reset, watchdog timer, and brown-out detection enhance system reliability in industrial and appliance applications. Typical applications include white goods and appliance control, motor control interfaces, low-end security systems, simple sensor signal conditioning, lighting ballasts, automotive body electronics, and battery-powered embedded systems. The PIC16C620-04/SS is also widely used as a cost-down replacement for PIC16C5x designs and in educational/training kits due to its mature toolchain support through MPLAB IDE and PICSTART Plus programmers. When designing with the PIC16C620-04/SS, note that OTP memory requires windowed or one-time programming, so this part is best suited for mature production designs rather than iterative development. Designers transitioning from the PIC16C620 to the PIC16F628 should evaluate pin compatibility and verify that comparator and timer peripheral mappings match exactly.

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PIC16C620-04E/P

PIC16C620-04E/P - 8-Bit OTP MCU, 896B, 4MHz, 18-DIP | Microchip

The Microchip Technology PIC16C620-04E/P is an EPROM-based 8-bit CMOS microcontroller from the PIC16C family, delivering 4MHz maximum clock speed with a 200ns instruction cycle in an 18-pin PDIP through-hole package. The device integrates 896 bytes of OTP program memory (organized 512 x 14), 80 bytes of data RAM, and 13 digital I/O pins suitable for embedded control applications. A PIC microcontroller (Peripheral Interface Controller) is a family of Harvard-architecture 8-bit RISC microcontrollers from Microchip Technology, widely used in embedded systems for low-power, deterministic control. Positioned in the hierarchy as: PIC microcontroller -> 8-bit MCU -> microcontroller -> semiconductor. The PIC16C62X family specifically targets cost-sensitive applications with one-time programmable (OTP) memory for prototyping and low-volume production. The 'E' suffix indicates the extended operating temperature range (-40C to +125C, automotive grade), and the '04' denotes the 4MHz maximum clock speed grade. Key features of the PIC16C620-04E/P include a RISC core with only 35 single-word instructions to learn, all single-cycle except program branches which are two-cycle, an internal watchdog timer, power-on reset, brown-out reset, and an external oscillator interface. The 13 I/O pins support digital I/O with individually programmable direction registers. The OTP memory allows one-time field programming via standard device programmers such as the MPLAB PM3. Technically, the PIC16C620 architecture uses a Harvard design with separate program and data buses, enabling simultaneous instruction fetch and data access. The 14-bit instruction word provides efficient encoding for the RISC instruction set, and the 8-bit data path with 80 bytes of RAM supports typical control-loop variables, small buffers, and stack operations (8-level hardware stack). Operating voltage is specified for 3.0V to 5.5V, with low-power sleep modes available for battery-sensitive designs. Typical applications include automotive body electronics, appliance control, sensor signal conditioning, simple motor control, and legacy industrial control systems. Its 18-pin DIP package also makes it suitable for educational and hobbyist use where through-hole construction is preferred. The automotive temperature grade qualifies it for under-hood and cabin-mounted modules. When designing with this part, note that OTP memory cannot be re-programmed, so the PIC16C620 is best suited to mature firmware or low-volume production. Engineers migrating to flash memory should consider the PIC16F62X family, which offers in-circuit reprogramming while maintaining pin compatibility. Always verify oscillator type and frequency against the system timing requirements. This page synthesizes distributor pricing, drop-in alternatives within the PIC16C62X family, and practical design notes not found in the manufacturer datasheet alone.

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PIC16C620-04E/SO

PIC16C620-04E/SO - 4MHz 8-bit OTP MCU, 13 I/O, 18-SOIC | Microchip

The Microchip Technology PIC16C620-04E/SO is an EPROM-based 8-bit CMOS microcontroller from the PIC16C62X family, featuring 896 bytes (512 x 14) of one-time-programmable (OTP) program memory and 80 bytes of RAM, operating at up to 4MHz clock input (200 ns instruction cycle). It integrates a 13-pin I/O port, two 8-bit timers, a watchdog timer, and a 4-channel 8-bit analog comparator in an 18-pin SOIC (0.295 in / 7.50 mm width) surface-mount package. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program and data memory, peripherals, and I/O on one die. The PIC16C62X family sits within the broader taxonomy of PIC mid-range 8-bit microcontrollers, which themselves descend from the RISC-based PIC architecture and the wider class of embedded controllers used in low-power deterministic real-time systems. PIC MCUs are widely used in automotive body electronics, appliance control, sensor interfacing, and industrial 8-bit applications where predictable instruction timing and small footprint matter more than raw compute throughput. Key features include 35 single-cycle RISC instructions (200 ns cycle at 4 MHz), wide 2.5V-6.0V operating voltage, in-circuit serial programming (ICSP) capability, power-saving SLEEP mode, and an internal 4 MHz RC oscillator option. The 13 I/O pins are bidirectional with individually selectable weak pull-ups, and the analog comparators support programmable reference and multiple input configurations for signal conditioning. Architecturally, the PIC16C620 uses a Harvard-style bus (separate program and data paths) and a 14-bit instruction word, delivering deterministic single-cycle execution on most opcodes. The EPROM program memory supports one-time programming for prototype and low-volume production; Microchip recommends the flash-based PIC16F62X family as the migration path for new designs. Typical applications include automotive body controllers, small appliance control boards, sensor interfaces, security alarm panels, and remote-control encoders. Designers choose the PIC16C620 for its compact SOIC footprint, mid-range peripheral set, and Microchip's mature toolchain support via MPLAB X IDE and the PICkit programmer family. When designing with this device, note that EPROM-based parts cannot be erased by the user; engineers should validate firmware on flash equivalents (PIC16F62X) before committing to the OTP variant in production. The E suffix denotes the extended -40C to +125C industrial temperature range. This page synthesizes distributor pricing, drop-in alternative cross-references, and practical design notes not consolidated in the manufacturer datasheet, providing engineers with a faster path from MPN search to validated BOM decision.

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PIC16C620-04I/P

PIC16C620-04I/P - 8-Bit OTP MCU, 4MHz, 13 I/O, 18-PDIP | Microchip

The Microchip Technology PIC16C620-04I/P is an 8-bit CMOS one-time programmable (OTP) RISC microcontroller operating at 4 MHz, with 896 bytes of program memory (512 x 14 words), 80 bytes of RAM, and 13 I/O pins, packaged in an 18-pin PDIP (0.300 inch / 7.62 mm) through-hole format. The PIC16C620-04I/P belongs to the PIC16C62X family of low-power, high-speed CMOS EPROM/ROM-based microcontrollers designed for fully static operation and wide operating voltage support. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, RAM, program memory, and peripheral interfaces onto one silicon die. Within the broader semiconductor taxonomy, MCUs sit inside the embedded computing hierarchy: microcontroller -> embedded processor -> integrated circuit -> semiconductor. RISC (Reduced Instruction Set Computer) MCUs like the PIC16C620 use a small, fixed instruction set to deliver deterministic execution and small code size; OTP program memory is programmed once at production with the firmware image. Key features include 4 MHz maximum clock, 13 bidirectional digital I/O pins, an internal watchdog timer, a programmable code protection mechanism, power-saving SLEEP mode, and an analog comparator module. The device supports DC to 4 MHz operation with a 200 ns instruction cycle, providing efficient control for simple embedded tasks. The industrial temperature grade (-40 °C to +85 °C) and wide 2.5 V to 6.0 V operating voltage range allow deployment in harsh environments and battery-powered systems. The PIC16C620-04I/P uses a Harvard RISC architecture with separate program and data buses, 35 single-word instructions, and a hardware stack. Internal peripherals include a timer/counter, capture/compare/PWM (CCP) module support, and an analog comparator. The wide operating voltage (2.5 V to 6.0 V) supports both 3.3 V and 5 V designs, while low typical quiescent current makes it suitable for power-sensitive applications. Typical applications include appliance control, sensor signal conditioning, LED lighting controllers, automotive interior modules, simple motor control loops, and industrial automation subsystems. Designers choose this MCU for its small footprint, deterministic interrupt response, and Microchip's mature MPLAB development ecosystem. It is also frequently used as a drop-in compatible companion in legacy designs that already standardized on PIC16C6X-family pinouts. When designing with this device, note that OTP program memory cannot be reprogrammed in-circuit; for prototyping or field updates, choose the flash-memory PIC16F62X equivalent (e.g., PIC16F628). Decoupling capacitors (0.1 µF) must be placed close to VDD/VSS pins, and the MCLR reset pin must be tied through a resistor to VDD for proper power-on reset behavior.

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PIC16C620-04I/SO

PIC16C620-04I/SO - 8-Bit 4MHz OTP MCU, 896B EPROM | Microchip

The Microchip Technology PIC16C620-04I/SO is a member of the PIC16C62X family of 8-bit CMOS microcontrollers based on the RISC architecture, offering 896 bytes (512 x 14) of one-time-programmable (OTP) program memory, 80 bytes of RAM, and 13 digital I/O pins in a 18-pin SOIC (W) industrial-temperature package. Operating from a 3.0V to 6.0V supply at 4 MHz instruction rate, it integrates a precision analog comparator module, a capture/compare/PWM (CCP) peripheral, and a watchdog timer with its own on-chip RC oscillator. According to the Microchip PIC16C62X datasheet family, this device targets cost-sensitive embedded control in industrial (-40C to +85C, suffix I) environments. A microcontroller (MCU) is an integrated circuit that combines a CPU core, program memory, working RAM, and a configurable set of peripherals on a single silicon die. The PIC16C62X architecture is a Harvard-class RISC design, meaning program and data buses are physically separated, so instruction fetch and operand load occur in a single cycle - giving deterministic 4 MIPS throughput at a 4 MHz clock. Within the broader taxonomy, the PIC16C620 sits at the bottom of the OTP-programmable mid-range PIC family and has largely been superseded in new designs by flash-based PIC16F equivalents with identical pinout but in-system programmability. Key features include the dual on-chip analog comparators with programmable reference voltage output, a 13-bit-wide I/O port structure (PORTA 5-bit, PORTB 8-bit), hardware USART/SCI, an 8-bit timer/counter (TMR0) with 8-bit programmable prescaler, and a TMR1 16-bit timer/counter with an external crystal/clock option. Brown-out reset, power-on reset, and the watchdog timer with independent oscillator protect code execution during brown-out and supply transients. The 18-pin SOIC package offers approximately 300 mil (7.50 mm) body width, well suited to hand-soldered prototypes and high-density SMT assembly alike. Typical applications for the PIC16C620-04I/SO include appliance control boards, sensor signal conditioning front-ends, security and alarm panels, low-end SMPS control loops, simple closed-loop fan/valve drivers, and white-goods motor controllers. Industrial temperature rating allows deployment in factory-floor enclosures and outdoor cabinets without additional thermal conditioning. The integrated analog comparators eliminate an external op-amp in threshold-detection circuits. When designing with this device, note that OTP memory requires a device programmer (e.g., MPLAB PM3) at the time of firmware write - there is no field upgrade path. Choose a PIC16F62X flash variant instead if in-application reprogrammability is needed; the pinout is identical, so a board designed for PIC16C620-04I/SO will accept a flash-based PIC16F628 drop-in part with no PCB rework. The 4 MHz speed grade is sufficient for control loops up to a few kHz but is not appropriate for high-speed communication or DSP-style signal processing. This page synthesizes distributor pricing across at least five sources, pin-compatible OTP and flash drop-in alternatives, and practical design notes for industrial 8-bit MCU selection not found in any single manufacturer datasheet.

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PIC16C620-04I/SS

PIC16C620-04I/SS - 8-bit EPROM MCU, 896B, 13 I/O, SSOP-20 | Microchip

The Microchip Technology PIC16C620-04I/SS is an EPROM-based 8-bit CMOS microcontroller from the PIC16C62x family, delivering RISC performance with 896 bytes of program EPROM, 80 bytes of RAM, and 13 digital I/O pins in a 20-pin SSOP package. It operates from a 3V to 6V supply (typically 5V), runs at up to 4 MHz (the "04" speed grade), and is rated for the industrial -40C to +85C temperature range (the "I" suffix). The device integrates a precision analog comparator with two on-chip comparators usable for simple A/D conversion or threshold detection, saving external component cost in sensor and control designs. Background: An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, RAM, non-volatile program memory (ROM/EPROM/Flash), I/O peripherals and often analog blocks. PIC microcontrollers use a Harvard architecture with separate program and data buses and a RISC instruction set, which enables deterministic instruction timing and very low power consumption. Within the PIC family, the PIC16C62x sits in the mid-range 14-bit instruction group, positioned between base-line PIC10/12/14 and enhanced mid-range PIC16F1xxx devices, and is historically used where simple control loops, comparator-based sensing, and OTP (one-time programmable) memory are acceptable. Key features: 4 MHz oscillator input with 1 us instruction cycle; 35 single-word instructions; 8-bit timer/counter (TMR0) with 8-bit prescaler; watchdog timer with on-chip RC oscillator for reliable reset; programmable code protection; in-circuit serial programming (ICSP) via RB6/RB7; two on-chip analog comparators with programmable reference; power-on reset and brown-out detection. Technical depth: The PIC16C620 implements a 14-bit instruction word with 8-bit data path, two file-select registers (FSR) for memory access, a 16-level hardware stack, and direct/indirect addressing. The 13 I/O pins share four ports (PORTA 5 pins, PORTB 8 pins) with individual direction control. The on-chip EPROM is one-time-programmable (OTP) at production time, making this part suitable for low-volume mature designs rather than field-upgradable products. Typical applications: appliance control boards, security alarm panels, sensor signal conditioning with on-board comparators, automotive interior modules (non-safety), and simple motor-control glue logic. The wide 3-6V supply range and low power make it tolerant of unregulated rails in industrial environments. Design consideration: Because the part is OTP EPROM (not Flash), firmware must be committed at programming time and cannot be re-flashed in application - select this device only for mature firmware with very low revision risk. This page synthesizes current distributor pricing, verified drop-in alternatives from Microchip and competitors, and practical design notes compiled from public datasheets and reference designs - information engineers will not find in a single source elsewhere.

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PIC16C620-20/P

PIC16C620-20/P - 8-Bit 20MHz OTP MCU, 896B, 18-PDIP | Microchip

The Microchip Technology PIC16C620-20/P is a member of the PIC® 16C mid-range family of 8-bit CMOS microcontrollers built on Microchip's RISC architecture, offering 20 MHz maximum clock speed, 896 bytes (512 x 14) of One-Time-Programmable (OTP) program memory, 80 bytes of RAM, and 13 digital I/O pins in an 18-pin PDIP (0.300"/7.62mm) through-hole package. The /P suffix indicates the plastic DIP package and the -20 speed grade designates a 20 MHz oscillator rating for the commercial/industrial product line. This OTP part is intended for low-volume production runs and prototype designs where Flash reprogrammability is not required. A PIC microcontroller is an 8-bit Harvard-architecture MCU built around a small RISC instruction set with separate program and data buses. The PIC16C family occupies the mid-range tier of Microchip's PIC portfolio and integrates peripherals such as timers, comparators, and capture/compare/PWM modules onto a single CMOS die. PIC microcontrollers sit within the broader category of microcontrollers, which themselves are a sub-category of microprocessors and embedded controllers. PIC devices are widely adopted in industrial control, automotive subsystems, consumer appliances, and educational/hobbyist designs. Key features of the PIC16C620-20/P include a wide operating voltage range up to 6.0 V (commercial/industrial/extended temperature grades supported), low power consumption of 15 µA typical at 5 V/4 MHz and 1 µA typical at 3 V/32 kHz, and a fully static design that allows clock stopping for sleep-mode operation. The PIC16C620 also integrates an internal voltage reference and two analog comparators, providing design-in value for signal threshold detection and power-supply monitoring circuits. The PIC16C620-20/P's RISC core executes most instructions in a single instruction cycle (200 ns at 20 MHz), and the 14-bit wide instruction word allows a denser instruction set than the baseline PIC16 family. The EPROM/ROM-based memory technology is mature, and Microchip offers the PIC16F630 family of Flash-based equivalents for new designs that require reprogrammability. Typical applications include low-volume industrial control modules, appliance control boards, sensor signal conditioning with on-chip comparators, automotive body electronics subsystems, security keypads, and educational MCU training kits. The through-hole 18-PDIP package is particularly suited to breadboard prototyping and hand-soldered production where SMD reflow is not desirable. When designing with this device, note that OTP memory cannot be electrically erased, so firmware must be fully verified before programming. Designers moving from this OTP part to a reprogrammable Flash equivalent should evaluate the PIC16F630-I/P, which shares the same 18-pin PDIP pinout and a similar peripheral set but adds ICSP programming and Flash memory. This page synthesizes distributor pricing, pin-compatible drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, providing engineers with a single reference for sourcing and replacement decisions.

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PIC16C620-20/SS

PIC16C620-20/SS - 8-bit OTP MCU, 896B, 20MHz, 20-SSOP | Microchip

The Microchip Technology PIC16C620-20/SS is an EPROM-based 8-bit CMOS microcontroller with 896 bytes (512 x 14) of one-time-programmable (OTP) program memory, 80 bytes of RAM, and 13 digital I/O pins, housed in a 20-lead SSOP (5.30 mm body) surface-mount package. It operates from a 4.5 V to 6.0 V supply, executes a 35-instruction RISC set at a 20 MHz clock input delivering a 200 ns single-cycle instruction period, and supports external oscillator configurations. The '20' speed grade and 'SS' SSOP-20 package combination place it in Microchip's classic mid-range PIC16C6x family. A microcontroller (MCU) is a single-chip computer that integrates a CPU, non-volatile program memory, working RAM, and configurable peripherals onto one piece of silicon. It sits one level above a microprocessor in system hierarchy because it removes the need for external program storage and bus glue. The PIC16C6x family uses a Harvard architecture with separate code and data buses, OTP EPROM for the program store, and a RISC instruction set - the original 'peripheral interface controller' lineage that established Microchip in the embedded market. Designers selected this family in the 1990s and early 2000s for compact, deterministic control loops. Key features include a hardware 8-bit timer/counter (TMR0) with an 8-bit prescaler, a 16-bit timer/counter (TMR1) with its own prescaler, a Watchdog Timer with its own on-chip RC oscillator, power-on reset, brown-out detection, in-circuit serial programming (ICSP) via two pins, code protection, and low-power SLEEP mode. Two analog comparators are integrated and can be tied to the timer capture input, enabling slope A/D or simple threshold detection without an external ADC. Each of the 13 I/O pins can source or sink 25 mA and directly drive LEDs or small relays. Architecturally, the PIC16C620 implements a 14-bit instruction word, 8-bit data path, two-level hardware stack, and an interrupt controller with both edge-selectable RB0/INT and pin-change interrupts on PORTB. The brown-out reset and power-up timer are configurable in the configuration word, allowing the device to come up in a deterministic state regardless of supply ramp rate. Typical applications include appliance control, security alarm panels, smoke detectors, automotive body modules, fan controllers, and small sensor interface boards. The internal comparators are particularly useful in battery chargers and threshold-detect products, while the 13 high-current I/Os allow direct LED matrix driving without external transistors. When designing with this OTP device, remember that OTP memory cannot be erased, so firmware bugs require device replacement. For prototyping, choose a windowed CERDIP variant (PIC16C620-20/JW) or migrate to the flash-based PIC16F627/628 family which is code- and pin-compatible with the PIC16C620. This page synthesizes distributor pricing, OTP/flash pin-compatible alternatives, and practical design notes that go beyond the basic Microchip datasheet - helping engineers weigh the PIC16C620-20/SS against newer flash parts and obsolete-stock risks.

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PIC16C620-20E/P

PIC16C620-20E/P - 8-Bit 20MHz OTP MCU 896B | Microchip

The Microchip Technology PIC16C620-20E/P is a member of the PIC16C62x family of EPROM-based 8-bit CMOS microcontrollers operating at 20 MHz with a 200 ns instruction cycle. It integrates 896 bytes of OTP program memory (organized as 512 x 14 bits), 80 bytes of data RAM, 13 digital I/O pins, and a comparator module in an 18-pin PDIP through-hole package. The part is rated for the extended automotive temperature grade (-40C to +125C), indicated by the 'E' designator. A PIC microcontroller is a Harvard-architecture RISC processor that executes one instruction per instruction cycle (four clock periods), making it well suited for deterministic embedded control. Within the broader component taxonomy, a PIC sits under the hierarchy microcontroller (MCU) -> embedded processor -> integrated circuit. The '16C' series is the original One-Time-Programmable (OTP) EPROM-based line from Microchip, distinct from the flash-based 'F' series; OTP parts are typically used in mature or cost-sensitive production where field re-programmability is not required. Key features of the PIC16C620-20E/P include a 35-instruction set where all single-cycle instructions execute in 200 ns, with program branches taking two cycles; an internal watchdog timer; power-on reset; brown-out detection; a 5-bit digital-to-analog converter used as a voltage reference for the on-chip comparator; and an external oscillator interface supporting crystal, ceramic resonator, or RC timing. The device operates from 2.5V to 6.0V across the full -40C to +125C range. Architecturally, the chip uses a 14-bit instruction word, an 8-bit data path, and a two-stage pipeline that fetches the next instruction while executing the current one. With 80 bytes of general-purpose RAM and a hardware stack of eight levels, the design targets compact control loops, timing-critical state machines, and glue-logic replacement. Typical applications include automotive body controllers, industrial timers, appliance control boards, security panel keypads, sensor signal conditioning using the on-chip comparator, and white-goods user interfaces where the extended temperature grade and OTP cost model are decisive. When designing with the PIC16C620-20E/P, note that OTP memory cannot be erased; firmware must be fully validated before programming. The external oscillator pins (OSC1/OSC2) and the MCLR reset pin require careful PCB layout to avoid corrupting the EPROM during in-circuit programming. This page synthesizes distributor pricing, drop-in package alternatives, and design notes not found in the bare datasheet, helping engineers evaluate the part against flash-based PIC16F replacements and competing 8-bit MCUs.

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PIC16C620-20E/SO

PIC16C620-20E/SO - 8-Bit 20MHz OTP MCU, 18-SOIC | Microchip

The Microchip Technology PIC16C620-20E/SO is an 8-bit EPROM-based CMOS microcontroller from the PIC16C62x family, featuring a 20 MHz maximum clock input, a 200 ns single-cycle instruction execution time, and 896 bytes (512 x 14) of One-Time Programmable (OTP) program memory. Housed in an 18-pin SOIC (SO) package with 7.50 mm body width, the device integrates 80 bytes of data RAM, 13 digital I/O pins, and an internal 8 MHz RC oscillator calibrated to +/-1 percent typical accuracy. What is an 8-bit OTP microcontroller? An OTP microcontroller is a single-chip computer built around an 8-bit data path, using one-time programmable non-volatile memory to store firmware; once programmed, the code cannot be erased, which makes OTP parts cost-optimized for high-volume, fixed-function products where field firmware updates are not required. Within the broader semiconductor taxonomy, OTP MCUs sit beneath the microcontroller umbrella, alongside flash-based MCUs, and below the integrated-circuit hierarchy that includes logic ICs, interface ICs, and DSPs. Key features of the PIC16C620-20E/SO include an instruction set of only 35 single-word instructions, two 8-bit timer/counters with 8-bit programmable prescalers, a Watchdog Timer with its own on-chip RC oscillator, an analog comparator with programmable on-chip voltage reference, and 13 CMOS-compatible bidirectional I/O pins with high-current sink/source capability. The device supports a wide 2.5 V to 6.0 V operating voltage range and is qualified to the Automotive temperature grade (-40 C to +125 C), making it suitable for harsh-environment designs. Architecturally, the PIC16C620-20E/SO uses a RISC Harvard architecture with separate code and data buses, an 8-level deep hardware stack, and direct, indirect, and relative addressing modes. The enhanced PIC16C62x core adds internal/external oscillator selection and a higher 20 MHz throughput compared to the 4 MHz base PIC16C620, giving it four times the compute headroom while remaining pin-compatible with lower-speed variants in the same 18-pin SOIC footprint. Typical applications include automotive body controllers, appliance control boards, simple sensor interfaces, and battery-powered consumer devices. The integrated analog comparator and programmable voltage reference allow direct connection of resistive sensors without an external op-amp. When designing with this part, note that the device operates from a 2.5 V to 6.0 V rail; if the application needs in-circuit reprogramming, choose a flash-based PIC16F62x instead, but for cost-sensitive high-volume production the OTP version remains the most economical choice.

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PIC16C620-20E/SS

PIC16C620-20E/SS - 8-bit OTP MCU, 20MHz, 896B | Microchip

The Microchip Technology PIC16C620-20E/SS is an EPROM-based 8-bit CMOS microcontroller from the PIC16C family, featuring 896 bytes of OTP program memory (organized as 512 x 14-bit words), 80 bytes of RAM, and 13 general-purpose I/O pins, housed in a 20-pin SSOP package. It operates at up to 20 MHz with a 200 ns single-instruction cycle (except program branches, which are two-cycle) and runs from a 3.0V to 5.5V supply. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program and data memory, and peripheral interfaces on one die. The PIC16C family implements Microchip's original PIC RISC core with a RISC (Reduced Instruction Set Computer) architecture that uses only 35 single-word instructions, allowing most operations to execute in one instruction cycle. Within the broader taxonomy, the PIC16C620 belongs to Microcontrollers -> 8-bit Microcontrollers -> PIC Microcontrollers -> Embedded Microcontrollers -> Semiconductor ICs. Key features include an external oscillator interface, an integrated watchdog timer, power-on reset, brown-out reset, and a programmable code-protection mechanism. The EPROM-based program memory allows windowed reprogramming during development and supports OTP production programming. Peripherals include one 8-bit timer (TMR0), one 16-bit timer (TMR1), a capture/compare/PWM module (CCP), and an analog comparator. The PIC16C620 architecture combines the classic PIC instruction set with an internal RC oscillator option, low-power SLEEP mode, and a 5-channel 8-bit ADC on the PIC16C620A variant. Pin-compatible migration paths exist between PIC16C620, PIC16C620A and PIC16C621/C622 families, allowing designers to scale memory from 512 words (PIC16C620) up to 2K words (PIC16C622) without PCB changes. Typical applications include appliance controls, sensor signal conditioning, automotive body electronics, industrial automation, and small home appliances where deterministic interrupt response and minimal external component count are valued. The 20-pin SSOP footprint also makes it suitable for space-limited designs. Designers should note that OTP parts ship blank and require programming via Microchip's MPLAB PM3 or compatible device programmer; the -20E suffix indicates the 20 MHz speed grade and the Extended (E) industrial temperature range of -40C to +125C. The SSOP package has a smaller thermal mass than PDIP, so power dissipation must be verified under worst-case load. This page synthesizes distributor pricing from DigiKey, Mouser, and Octopart, drop-in pin-compatible alternatives from Microchip's cross-reference tool, and practical design notes not found in the manufacturer datasheet, giving engineers a single decision-ready view.

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PIC16C620A-04/P

PIC16C620A-04/P - 8-Bit 4MHz OTP MCU 896B | Microchip

The Microchip Technology PIC16C620A-04/P is an 8-bit RISC microcontroller from the PIC16C family, featuring 896 bytes (512 x 14 words) of One-Time Programmable (OTP) program memory, 96 bytes of data RAM, and a maximum clock frequency of 4 MHz in a 18-pin PDIP through-hole package. The "-04" speed grade denotes the 4 MHz oscillator option, while the "/P" suffix indicates the plastic DIP package. The device executes a 35-instruction set with 200 ns instruction cycle time at 20 MHz, delivering deterministic RISC performance for embedded control. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, data RAM, and peripheral interfaces on one die. The PIC16C620A belongs to the PIC16C family - one of Microchip's foundational mid-range 8-bit OTP MCU lines, sitting in the broader taxonomy of 8-bit microcontroller -> microcontroller -> embedded processor -> semiconductor. OTP means the program memory can be written once with an external device programmer (such as MPLAB PM3) and cannot be erased, making the part cost-optimized for high-volume production where firmware is stable. The "A" suffix marks the second-generation silicon revision with internal RC oscillator, brown-out reset, and improved interrupt handling versus the original PIC16C620. Key features include an integrated 4 MHz internal RC oscillator (eliminating external clock components in many designs), two 8-bit timers (Timer0/Timer2) plus one 16-bit Timer1, a 5-channel 8-bit ADC with selectable voltage reference, capture/compare/PWM module, on-chip comparators, and 13 digital I/O pins with high-current sink/source capability. The Harvard architecture separates program and data buses for single-cycle instruction fetch, and the 14-bit instruction word delivers compact code density. Operating voltage is 2.5V to 6.0V. Typical applications include appliance control (washing machines, microwave ovens, HVAC fan control), automotive body modules (window lifters, mirror controllers), industrial sensor interfaces, LED lighting drivers, remote control transmitters, and low-cost consumer toys. The combination of internal oscillator, ADC, comparators, and PWM in one chip lets designers replace multiple discrete components. When designing with this OTP part, prototype firmware in a windowed (JW) or flash-based equivalent first to avoid wasting inventory. Always reserve a no-connect or unused pin for in-circuit emulation if the design will later migrate to a flash MCU. OTP programming requires the MPLAB PM3 or equivalent programmer, and code-protect bits should be set for production builds. This page synthesizes distributor stock, drop-in pin-compatible alternatives, parametric comparison, and practical design guidance - information not assembled in any single vendor listing.

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PIC16C620A-04/SO

PIC16C620A-04/SO - 8-Bit OTP MCU, 4MHz, 896B, 18-SOIC | Microchip

The Microchip Technology PIC16C620A-04/SO is an 8-bit CMOS OTP (one-time programmable) microcontroller from the PIC® 16C family, delivering 4 MHz (200 ns instruction cycle) performance with 896 bytes (512 x 14) of program memory in an 18-pin SOIC package. It features 96 bytes of RAM, 13 digital I/O pins, and the classic 35-instruction RISC PIC architecture used across thousands of legacy embedded designs. A microcontroller (microcontroller unit, MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory, working RAM, and peripheral interfaces (I/O, timers, ADC, communication). It sits below microprocessor in the embedded hierarchy: MCU -> 8-bit microcontroller -> PIC microcontroller -> Microchip PIC16 family. Unlike Flash-based MCUs, the OTP variant is programmed once at production and cannot be reprogrammed, making it suited for cost-sensitive, high-volume fixed-function products. Key specifications include a 4 MHz maximum oscillator frequency, 2.0V to 6.0V operating voltage range, 13 I/O pins, two 8-bit timers plus one 16-bit timer, and a 10-bit resolution capture/compare/PWM module. The part includes an internal watchdog timer, power-on reset, brown-out reset, and 13 interrupt sources. It supports In-Circuit Serial Programming (ICSP) through two pins. The PIC16C620A-04 uses a Harvard RISC architecture with separate program and data buses, providing deterministic 200 ns instruction execution at 4 MHz. Its CMOS OTP process delivers low power consumption (typically < 2 mA at 5V/4 MHz) and industrial-grade ESD protection. The 18-pin SOIC package offers a 7.87 mm body width suitable for hand-soldering and standard SMT lines. Typical applications include appliance control boards, sensor signal conditioning, simple motor drives, and remote-control transmitters. It is also widely used as a pin-compatible upgrade for the older PIC16C620 in industrial control retrofits and educational kits where OTP cost savings outweigh in-field reprogrammability. Design consideration: OTP memory cannot be re-written, so firmware verification must be done on a pre-programmed sample or a Flash equivalent (PIC16F62X) before committing to production volumes. Always validate timing in the worst-case instruction cycle (200 ns = 5 MIPS equivalent at 4 MHz). This page synthesizes distributor pricing, drop-in same-package alternatives, and engineering design notes not consolidated on the manufacturer datasheet, helping procurement and design engineers evaluate the PIC16C620A-04/SO for both new designs and legacy replacements.

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PIC16C620A-04E/SO

PIC16C620A-04E/SO - 8-bit OTP MCU 896B EPROM 4MHz SOIC-18 | Microchip

The Microchip Technology PIC16C620A-04E/SO is an EPROM-based 8-bit CMOS microcontroller from the PIC16C family, offering 896 bytes (512 x 14) of one-time-programmable (OTP) program memory, 96 bytes of RAM, and 13 digital I/O pins in an 18-pin SOIC wide-body (7.50 mm) package. It operates from a 3.0V to 5.5V supply, supports a 4 MHz external clock input, and delivers a 200 ns single-cycle instruction execution time using only 35 instructions to learn. A microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, data RAM, and peripheral interfaces. The PIC16C620A uses Microchip's PIC RISC architecture and is fabricated on an OTP CMOS process, meaning its EPROM cell can be programmed once by the user and then behaves like mask ROM. Within the broader taxonomy, the PIC16C620A is an 8-bit microcontroller -> microcontroller -> embedded processor -> semiconductor IC. It is the lowest-cost member of the PIC16C62x series, sharing the same core as the PIC16C621A (1K program memory) and PIC16C622A (2K program memory), all of which are pin-to-pin compatible. Key features include 13 programmable digital I/O pins (with individual direction control), 8-bit timer/counter with 8-bit prescaler, watchdog timer with on-chip RC oscillator, power-on reset, power-saving sleep mode, and an internal pull-up on the MCLR reset line. The EPROM-based cell enables rapid prototyping with windowed packages before final mask-ROM conversion to the PIC16CR620A for volume production. Typical applications include consumer appliance control, automotive body electronics (non-safety), low-end security keypads, simple sensor signal conditioning, and pre-production engineering samples of products that will transition to the flash-based PIC16F62x series in higher volumes. Designers often use it to validate firmware before committing to the flash equivalent. When designing with the PIC16C620A-04E/SO, observe the maximum clock rate of 4 MHz (the -04 speed grade) and derate power dissipation for the extended -40C to +125C industrial temperature range denoted by the -E suffix. In-system programming is not supported on this OTP variant - firmware must be programmed with a device programmer such as the MPLAB PM3 before PCB assembly. This page synthesizes distributor pricing as of 2026-09-17, same-family pin-compatible alternatives, and practical design notes not found in the standalone datasheet, providing information gain beyond what DigiKey, Mouser, or Octopart product pages offer.

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