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PIC16C54T-HS/SO - 8-Bit 20MHz OTP MCU 768B | Microchip
PIC16C54T-HS/SO

PIC16C54T-HS/SO - 8-Bit 20MHz OTP MCU 768B | Microchip

The Microchip Technology PIC16C54T-HS/SO is an 8-bit RISC microcontroller from the PIC16C5x family, featuring 768 bytes (512 x 12) of One-Time-Programmable (OTP) EPROM program memory, 25 bytes of RAM, and 12 digital I/O pins, housed in an 18-pin SOIC (SO) surface-mount package. The "HS" suffix denotes the High-Speed oscillator option, supporting an external clock input up to 20 MHz that yields a 200 ns instruction cycle; the "T" suffix denotes Tape-and-Reel packaging for high-volume assembly, while "/SO" specifies the 0.295-inch (7.50 mm) wide SOIC footprint. A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory, and programmable I/O peripherals into one device. The PIC16C54 sits at the bottom of the classic PIC16C 8-bit family, using a RISC instruction set where 33 single-word instructions execute in one cycle (200 ns at 20 MHz), except for program branches which take two cycles. It belongs to the broader category hierarchy of microcontroller → microprocessor → integrated circuit → semiconductor, and is built on EPROM/ROM-based CMOS process technology that delivers fully static operation for low power and wide operating flexibility. Key features include a 12-bit instruction word, 8-bit-wide data path, 8-level hardware stack, power-on reset, watchdog timer, and an operating voltage range of 4.5 V to 5.5 V. The device supports a commercial temperature range of 0 °C to +70 °C. Its internal architecture features separate instruction and data buses (Harvard architecture), allowing instruction fetch and data access to occur simultaneously for predictable throughput. Typical applications span low-cost embedded control in consumer electronics, industrial automation, automotive subsystems (non-safety), and legacy replacement boards where a simple 8-bit controller is sufficient. The 12 I/O pins can directly drive LEDs, relays, and logic-level interfaces, while the EPROM program memory supports one-time programming for production volumes. When designing with the PIC16C54T-HS/SO, ensure the external oscillator circuit matches the HS mode specification (typically a 20 MHz crystal with load capacitors). Decouple VDD with a 0.1 µF ceramic capacitor placed close to the pin, and leave the MCLR pin connected through the recommended reset network. The OTP memory cannot be electrically erased, so firmware must be fully verified before programming. This page synthesizes distributor pricing, drop-in 18-SOIC alternatives from the same PIC16C5x family, and practical design guidance not consolidated on any single manufacturer or distributor page.

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PIC16C54T-HSE/SO - 16MHz 8-Bit CMOS OTP MCU | Microchip
PIC16C54T-HSE/SO

PIC16C54T-HSE/SO - 16MHz 8-Bit CMOS OTP MCU | Microchip

The Microchip Technology PIC16C54T-HSE/SO is an EPROM/ROM-based 8-bit CMOS microcontroller from the PIC16C5x family, housed in an 18-pin SOIC package and supplied on tape and reel. The HSE suffix designates a 16MHz maximum clock input with high-speed oscillator and EPROM program memory. According to the Microchip datasheet, the device delivers up to 16MHz core speed, 768 bytes (512 x 12) of OTP program memory, and 25 bytes of data RAM in a compact 18-SOIC outline suitable for surface-mount assembly. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, data RAM, and peripheral interfaces on one silicon die. The PIC16C5x family is an early RISC architecture featuring 33 single-word instructions and a 12-bit-wide instruction word, achieving 2:1 code compression over competing 8-bit controllers in its class. The PIC16C54T-HSE/SO sits within the broader taxonomy: microcontroller -> 8-bit MCU -> RISC MCU -> PIC16 family -> PIC16C5x sub-family -> PIC16C54 device, and is fabricated in CMOS for low-power operation across an automotive-grade temperature range. Key features include 12 general-purpose I/O lines, a 200ns single-cycle instruction time, a 4.5V to 5.5V supply range, and 16MHz maximum oscillator input. The 33-instruction RISC set and 12-bit program word keep firmware compact, while 25 bytes of RAM support small state machines and simple control loops. The device supports two-cycle program branches and one-cycle execution on all other instructions, simplifying deterministic timing analysis. EPROM-based program memory enables windowed reprogramming during development but is one-time-programmable in production SOIC variants. Typical applications include industrial automation, consumer electronics, automotive subsystems, and simple embedded control where deterministic timing, low cost, and small footprint matter most. Designers commonly use this part for sensor interfaces, keypad controllers, LED drivers, and low-speed communication bridges. The extended -40C to +125C operating range qualifies the part for under-hood and factory-floor environments where commercial-grade parts would otherwise fail. When designing with this device, note that the OTP memory window is not present on the SOIC package - firmware must be fully verified before final programming. Decoupling capacitors must be placed within 5mm of VDD/VSS pins, and unused I/O should be configured as outputs low to minimize current draw. The 200ns instruction cycle allows software UART bit-banging at common baud rates up to 115200 bps with appropriate interrupt handling. This page synthesizes distributor pricing, OTP-vs-EPROM trade-offs, drop-in alternatives from the PIC16C5x family, and practical design notes not found in the standalone manufacturer datasheet.

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PIC16C54T-HSE/SS - 8-Bit OTP MCU, 20MHz, 768B EPROM | Microchip
PIC16C54T-HSE/SS

PIC16C54T-HSE/SS - 8-Bit OTP MCU, 20MHz, 768B EPROM | Microchip

The Microchip Technology PIC16C54T-HSE/SS is an 8-bit EPROM/ROM-based CMOS microcontroller from the PIC16C5X family, delivering 768 bytes of one-time programmable (OTP) program memory in a 20-pin SSOP package. It executes instructions at 20 MHz through a 200 ns single-cycle pipeline, with 12 I/O pins, 25 bytes of RAM, and a 12-bit-wide instruction word. The device operates from a 4.5 V to 5.5 V supply and is qualified to automotive temperature grades (HSE suffix). A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory (program + RAM), and peripherals on one die. Within the broader taxonomy, the PIC16C54 belongs to the 8-bit MCU class, which sits below 16-bit, 32-bit, and 64-bit controllers. The PIC16C5X family uses a RISC (Reduced Instruction Set Computer) architecture with only 33 single-word/single-cycle instructions, simplifying code generation and execution. Microcontrollers are the foundational building blocks of embedded systems, found in everything from toys to automotive ECUs. Key features include 33 single-word instructions (all single-cycle except program branches, which are two-cycle), 12 bidirectional I/O ports, an 8-bit real-time clock/counter (RTCC) with programmable prescaler, a power-on reset (POR) circuit, and a watchdog timer (WDT) for reliable operation in noisy environments. The device supports an external oscillator and includes an EPROM-based program memory for one-time field programming. The PIC16C54 uses a Harvard architecture with separate program and data buses, allowing instruction fetch and operand access to occur in the same cycle. Its CMOS process delivers low static current consumption, and the device is fully static, enabling the clock to be stopped without losing register state. This makes the part well-suited to battery-friendly or event-driven designs. Typical applications include automotive body electronics, simple sensor interface controllers, low-cost consumer appliances, replacement of discrete logic in glue applications, and small electromechanical control loops. The automotive-grade HSE temperature variant (-40 C to +125 C) is suitable for under-hood and cabin modules. When designing with the PIC16C54, ensure the MCLR (master clear) reset pin is properly pulled high and that the in-circuit serial programming (ICSP) interface is accessible if firmware updates are required after PCB assembly. The OTP memory cannot be erased, so use an OTP version only when code is fully validated; for development, a windowed CERDIP (JW) variant is recommended. This page synthesizes distributor pricing, drop-in alternative listings, and practical design notes that are not typically consolidated on a single manufacturer page, providing an engineer-focused reference for sourcing and design-in decisions.

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PIC16C54T-LP/SO - 8-Bit 40MHz OTP MCU 768B | Microchip
PIC16C54T-LP/SO

PIC16C54T-LP/SO - 8-Bit 40MHz OTP MCU 768B | Microchip

The Microchip Technology PIC16C54T-LP/SO is an 8-bit OTP (One-Time Programmable) microcontroller from the PIC16C5x family, featuring a 40MHz core processor with a 200 ns instruction cycle in an 18-pin SOIC (0.295", 7.50mm width) package. The 'T' suffix denotes Tape & Reel packaging, the 'LP' indicates the low-power 20MHz maximum clock variant, and '/SO' specifies the 18-SOIC surface-mount form factor. The device integrates 768 bytes of OTP program memory organized as 512 x 12 bits and 25 bytes of RAM, with 12 digital I/O pins. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, data RAM, and peripheral I/O on a single silicon die. The PIC16C5x family employs a RISC architecture with only 33 single-word, single-cycle instructions, making it one of the most compact instruction sets among 8-bit MCUs. These devices fall within the broader microcontroller hierarchy: 8-bit MCU -> RISC MCU -> embedded controller -> semiconductor IC, occupying the low-cost, high-performance tier of Microchip's portfolio. Key features include a wide operating voltage range of 2.5 V to 6.25 V, 12 I/O pins, an 8-bit timer/counter, and a 2-level hardware stack. The 33-instruction RISC core delivers deterministic 200 ns instruction execution at 20 MHz, eliminating the need for pipelining complexity in resource-constrained designs. Power consumption is minimized by the LP (low-power) process technology, supporting battery-backed and energy-harvesting applications. The PIC16C54T-LP/SO uses 12-bit-wide instruction words and a Harvard memory architecture separating program and data paths. With OTP program memory, each device is programmed once at production time and cannot be re-flashed, making it suited for high-volume, cost-sensitive applications where firmware is finalized. The 18-SOIC package offers hand-solderable accessibility for prototyping while remaining compatible with automated SMT lines. Typical applications include consumer electronics remote controls, appliance controllers, low-end sensor interfaces, LED driver controllers, and replacement of discrete logic in cost-sensitive products. Designers favor this part when code space (under 512 instructions) and RAM (25 bytes) are sufficient and when unit cost per MCU must be minimized. When designing with the PIC16C54T-LP/SO, ensure your code fits within 512 12-bit instruction words, since OTP memory cannot be erased or rewritten. Programming is performed via Microchip's PICkit or MPLAB ICD tools. For new designs, the PIC16F54 flash-based equivalent is recommended unless OTP cost savings are essential. This page synthesizes distributor pricing, drop-in same-package alternatives, and engineering design notes not found in the manufacturer datasheet.

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PIC16C54T-LP/SS - 8-Bit 40MHz OTP MCU 768B | Microchip
PIC16C54T-LP/SS

PIC16C54T-LP/SS - 8-Bit 40MHz OTP MCU 768B | Microchip

The Microchip Technology PIC16C54T-LP/SS is an 8-bit RISC microcontroller from the PIC16C5X family operating at up to 40 MHz, housed in a 20-pin SSOP (Shrink Small Outline Package) with Tape & Reel packaging. It integrates 768 bytes of One-Time Programmable (OTP) EPROM program memory organized as 512 x 12-bit words, 25 bytes of general-purpose RAM, and a 12-bit instruction set optimized for compact code density. The 'T' suffix indicates tape and reel packaging, 'LP' denotes the low-power CMOS process variant, and '/SS' specifies the 20-pin SSOP footprint. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, memory, and programmable I/O on a single die. The PIC16C5X family belongs to Microchip's original PIC (Peripheral Interface Controller) architecture, which uses a Harvard RISC design with separate program and data buses. Within the broader taxonomy, PIC16C5X sits as: 8-bit MCU -> RISC microcontroller -> embedded controller -> semiconductor IC. OTP memory means each device can be programmed once and retains code without power, making this family well-suited to cost-sensitive volume production where firmware is finalized at manufacturing. Key features of the PIC16C54T-LP/SS include: 12 I/O pins with individual direction control, Power-On Reset (POR) for reliable cold-start behavior, Watchdog Timer (WDT) for fault recovery, an internal RC oscillator option, and a wide operating voltage range of 2.5 V to 6.25 V (3.3 V/5 V typical). The device uses a 12-bit instruction word and a two-stage pipeline, achieving near single-cycle execution for most instructions. Commercial temperature grade (0 °C to +70 °C) makes it appropriate for consumer and industrial-grade products with controlled thermal environments. From an architectural standpoint, the PIC16C54 uses a modified Harvard architecture with 33 single-word instructions. The core runs synchronously and is fully static, allowing the clock to be halted for power saving. With 25 bytes of RAM and only two hardware registers (W register and file select register), the device targets simple control loops, sensor interfacing, and discrete logic replacement. The /SS package variant offers a narrower 5.30 mm body width compared to standard SOIC, enabling higher PCB density. Typical applications include low-cost remote controls, appliance control boards, LED drivers, battery chargers, security keypads, simple sensor interfaces, and hobbyist/Maker projects where a small pin-count MCU with deterministic interrupt response is sufficient. Designers migrating from older discrete logic often adopt this part to consolidate timing, sequencing, and I/O functions onto a single chip. When laying out a PCB for the PIC16C54T-LP/SS, place a 0.1 µF decoupling capacitor as close as possible to the VDD pin and provide a short ground return to VSS. For crystal operation, keep the crystal and load capacitors within a few millimeters of the OSC1/OSC2 pins to minimize startup issues. Designers should also budget for the OTP programming window in the production test plan. This page synthesizes distributor stock, verified pin-compatible alternatives, and engineering design notes that go beyond the manufacturer datasheet to help buyers and embedded engineers qualify the part faster.

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PIC16C54T-LPE/SS - 8-bit 40MHz 768B OTP MCU 20-SSOP | Microchip
PIC16C54T-LPE/SS

PIC16C54T-LPE/SS - 8-bit 40MHz 768B OTP MCU 20-SSOP | Microchip

The Microchip Technology PIC16C54T-LPE/SS is an 8-bit CMOS ROM-based microcontroller from the PIC16C5x family, featuring a 20 MHz maximum clock input (40 MHz internal core equivalent per the source listing), 768 bytes of One-Time-Programmable (OTP) program memory organized as 512 × 12, and 25 bytes of data RAM, housed in a 20-pin SSOP package. Tape and reel orientation is indicated by the "T" suffix, while "LPE" denotes low-power extended voltage and the SSOP package code. An OTP microcontroller is a single-chip microprocessor whose program memory can be written exactly once by the user and then behaves as read-only ROM thereafter. OTP MCUs sit within the broader hierarchy: microcontroller (MCU) -> embedded controller -> semiconductor IC. The PIC16C5x architecture uses a Harvard-style RISC core with a fixed 12-bit instruction word, achieving 2:1 code compression versus typical 8-bit CISC alternatives, and offers only 33 single-word instructions to learn. Key features of the PIC16C54T-LPE/SS include 12 I/O pins, Power-On Reset (POR), Watchdog Timer (WDT) with its own on-chip RC oscillator, code protection, and a wide operating voltage range of 2.5 V to 6.25 V. The device executes most instructions in a single 200 ns cycle (one oscillator period of four clocks), with program branches taking two cycles. Its CMOS design keeps supply current low and provides high noise immunity, ideal for battery-backed and cost-sensitive appliances. The architecture combines a simple RISC datapath with on-chip EPROM/OTP program memory and dedicated peripheral blocks, eliminating the need for external program storage or complex glue logic. Because the PIC16C5x core lacks interrupts, all timing is handled by polling and the watchdog timer, simplifying deterministic control loops in cost-sensitive designs. Typical applications include consumer appliance control, simple remote-control transmitters, sensor signal conditioning front-ends, low-end automotive subsystems, battery chargers, and toy electronics. The OTP memory suits high-volume production where software is finalized. Designers should allocate a 0.1 µF decoupling capacitor close to VDD and follow Microchip's recommended oscillator layout to avoid start-up failures. The low-power "LPE" variant extends the operating voltage range for use with 2×AA cells or 3.3 V regulated rails. This page synthesizes distributor pricing, drop-in same-family alternatives, and practical design notes not found in the manufacturer datasheet.

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PIC16C54T-LPI/SO - 8-Bit 40MHz OTP MCU, 768B, 18-SOIC | Microchip
PIC16C54T-LPI/SO

PIC16C54T-LPI/SO - 8-Bit 40MHz OTP MCU, 768B, 18-SOIC | Microchip

The Microchip Technology PIC16C54T-LPI/SO is an 8-bit, ROM/EPROM-based CMOS microcontroller from the PIC16C5x family, offering a 40 MHz maximum operating frequency with 200 ns single-cycle instruction execution. The device integrates 768 bytes of one-time programmable (OTP) program memory (512 x 12-bit words) and 25 bytes of general-purpose RAM in a 18-pin SOIC (SO) package suitable for surface-mount assembly. What is an OTP microcontroller? An OTP (One-Time Programmable) microcontroller is a type of embedded controller that uses non-volatile memory which can be written only once after manufacture. Unlike flash-based MCUs that allow many erase/write cycles, OTP parts are programmed a single time at production and are typically lower cost, making them well suited for high-volume, cost-sensitive applications where firmware is finalized before production. OTP microcontrollers belong to the broader hierarchy of microcontrollers -> embedded controllers -> microprocessors -> semiconductor ICs. Key features include 12 I/O pins supporting bidirectional digital I/O, a programmable Watchdog Timer (WDT) for runaway code recovery, Power-On Reset (POR) for reliable cold-start behavior, and an internal oscillator option for designs that minimize external component count. The PIC16C5x RISC architecture provides 33 single-word instructions, of which all execute in a single 200 ns cycle except program branches (two cycles), giving C-code-density 2:1 compression versus typical 8-bit CISC microcontrollers in its class. Technical depth: the part runs from a 4.5V to 5.5V supply, supports an external clock up to 20 MHz (yielding 200 ns instruction cycle time), and includes a brown-out/reset path. The industrial-grade temperature variant (the "I" suffix in LPI) operates from -40 °C to +85 °C. Because the device is OTP, firmware must be fully validated before programming; field updates are not possible without a hardware swap. Typical applications include low-cost appliance controllers, remote-control transmitters, simple sensor interfaces, LED driving, and small consumer-electronic subsystems. The PIC16C54T-LPI/SO fits particularly well when deterministic timing, a tiny code footprint, and a minimal BOM are higher priorities than in-system reprogrammability. A key design consideration is choosing OTP over flash: OTP units ship at lower per-piece cost and offer a more secure code image, but they cannot be re-burned during board bring-up, so engineering development should use a JW or QTP equivalent. This page synthesizes distributor pricing, drop-in same-package alternatives (PIC16C54C-04/SO, PIC16C54A-20/SO, PIC16C54CT-20I/SO, PIC16C54-LPI/SO, PIC16C54T-LP/SO), and practical design notes not found in the standalone manufacturer datasheet.

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PIC16C54T-RC/SO - 8-bit 4MHz OTP MCU, 768B | Microchip
PIC16C54T-RC/SO

PIC16C54T-RC/SO - 8-bit 4MHz OTP MCU, 768B | Microchip

The Microchip PIC16C54T-RC/SO is a member of the PIC16C5X family of low-cost, high-performance 8-bit fully-static EPROM/ROM-based CMOS microcontrollers, delivering 4 MHz CPU performance with 768 bytes of OTP program memory (organized as 512 x 12-bit words) and 25 bytes of general-purpose RAM in an 18-pin SOIC package. The 'T' suffix indicates Tape and Reel packaging, the 'RC' suffix denotes the oscillator type (external RC oscillator with up to 4 MHz CPU clock), and 'SO' designates the 18-lead Small Outline Integrated Circuit (SOIC-18) surface-mount package. Commercial temperature grade (0C to +70C) supports standard office and consumer environments. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, working RAM, and configurable I/O peripherals. Within the broader semiconductor taxonomy, microcontrollers sit under microprocessors and, more broadly, under digital ICs and integrated circuits. The PIC16C5X family, also known as the PIC16C5x baseline architecture, uses a RISC-style Harvard architecture with a fixed 12-bit instruction word, which yields approximately 2:1 code compression versus competing 8-bit CISC microcontrollers and simplifies firmware development. Key features include 12 I/O pins with individual direction control, an 8-bit timer/counter (TMR0) with an 8-bit programmable prescaler, a watchdog timer with its own on-chip RC oscillator for reliable resets, power-on reset, power-saving SLEEP mode, and a wide 2.5V to 6.25V operating voltage range. Code protection bit prevents unauthorized memory reads. The Harvard bus keeps program and data paths separate for predictable single-cycle instruction execution, except for program branches which take two cycles. Architecturally, the device uses a 12-bit program counter to address up to 2K x 12 of OTP/EPROM memory and 32 x 8 of file registers (special function plus general-purpose RAM). CMOS fabrication provides low power consumption - typical supply current is below 2 mA active and under 4 uA in SLEEP - enabling battery-friendly designs. Typical applications include low-cost consumer appliances, simple logic replacement, timer/counter subsystems, sensor front-ends, and remote control transmitters. The SOIC-18 footprint also makes it usable as a substitute for legacy 18-pin discrete logic circuits in maintenance and retrofits. Pair with a PICkit programmer and MPLAB X IDE for development. For reliable operation, place a 0.1 uF decoupling capacitor close to the VDD pin and choose the RC oscillator timing components (R, C) according to the datasheet frequency chart to keep CPU clock within tolerance. This page synthesizes distributor pricing, drop-in alternatives, and engineering design notes that go beyond the manufacturer datasheet by adding comparison context, selection guidance, and practical layout recommendations.

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PIC16C54T-RC/SS - 4MHz 8-Bit OTP MCU 768B | Microchip
PIC16C54T-RC/SS

PIC16C54T-RC/SS - 4MHz 8-Bit OTP MCU 768B | Microchip

The Microchip Technology PIC16C54T-RC/SS is an 8-bit, fully-static, EPROM/ROM-based CMOS microcontroller belonging to the PIC16C5x family, delivering 4 MHz CPU performance from 768 bytes (512 x 12) of one-time-programmable (OTP) program memory in a 20-pin SSOP (5.30 mm body width) tape-and-reel package. It operates from 3.0 V to 5.5 V across the commercial/industrial temperature range and is paired with 25 bytes of general-purpose RAM and 12 digital I/O lines. The "T" suffix denotes tape-and-reel packaging and "RC" specifies the 4 MHz resonator/RC-oscillator speed grade; "SS" indicates the 20-pin SSOP footprint. What is a PIC16C5x microcontroller? The PIC16C5x is Microchip's original low-cost, high-performance 8-bit RISC family, widely regarded as the ancestor of all modern PIC MCUs. It uses a Harvard architecture with separate program and data buses, a 12-bit-wide instruction word, and a fixed 33-instruction set. In the broader taxonomy, the PIC16C5x sits under: microcontroller -> embedded microcontroller -> 8-bit MCU -> RISC MCU -> EPROM/ROM-based MCU -> power management and control IC family. Key features include 33 single-word/single-cycle RISC instructions, 2:1 code compression versus competing 8-bit MCUs through 12-bit-wide instructions, Power-On Reset (POR), Watchdog Timer (WDT) with on-chip RC oscillator, and programmable code protection. The 12-bit instruction width yields compact code density uncommon in 8-bit parts, while the two-level deep hardware stack and 2 K x 12 program-memory address space support compact firmware designs. The PIC16C5x uses a RISC pipeline with single-cycle execution (except branches, which take two cycles), and integrates a precision 4 MHz internal RC-style oscillator reference. With a 4 MHz clock and 4 Tcy per instruction cycle, each instruction executes in 1 microsecond, delivering roughly 1 MIPS of throughput. The device's CMOS design provides low power consumption suitable for both battery and line-powered applications. Typical applications include appliance control, automotive body electronics, low-power remote sensors, security and access systems, and general-purpose embedded logic replacement. The wide 3.0 V to 5.5 V supply range and small SSOP-20 footprint make it well-suited for cost-sensitive, space-constrained designs. When designing with the PIC16C5x, ensure the OTP-programmed firmware is finalized before volume production - the "C" ROM family is one-time-programmable, so any firmware change requires a new part. Use the WDT for unattended recovery from software or hardware faults, and add 0.1 uF ceramic bypass capacitors near VDD/SS for stable operation. This page synthesizes distributor pricing, drop-in alternatives from the PIC16C5x family and competitive 8-bit MCUs, application examples, and practical design notes not found in the manufacturer datasheet.

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PIC16C54T-RCE/SO - 8-Bit OTP MCU, 4MHz, 18-SOIC | Microchip
PIC16C54T-RCE/SO

PIC16C54T-RCE/SO - 8-Bit OTP MCU, 4MHz, 18-SOIC | Microchip

The Microchip Technology PIC16C54T-RCE/SO is a member of the PIC16C5X family of low-cost, high-performance 8-bit fully-static EPROM/ROM-based CMOS microcontrollers, operating at up to 4 MHz (200 ns instruction cycle) in an 18-pin SOIC package supplied in Tape & Reel. The T-suffix indicates tape-and-reel packaging, /RCE denotes the extended (E) temperature grade, and /SO designates the 18-SOIC (7.50 mm) footprint. An 8-bit microcontroller (MCU) is a small single-chip computer that integrates a CPU, program memory, RAM, and peripheral I/O on a single die, executing instructions from on-chip program memory. Within the taxonomy, the PIC16C54 belongs to the hierarchy: microcontroller -> 8-bit MCU -> CMOS RISC MCU -> PIC16C5X family -> PIC16C54 sub-family, in the broader power management and embedded control semiconductor category. The /RCE ROMless/OTP one-time-programmable version is optimized for low-volume and prototype designs where field reprogrammability is not required. Key features include 768 bytes (512 x 12) of OTP program memory, 25 bytes of general-purpose RAM, 12 digital I/O pins, a 33-instruction RISC instruction set, a hardware Watchdog Timer (WDT), Power-On Reset (POR), and an external oscillator interface. Single-cycle instruction execution (except program branches) and 12-bit-wide opcodes produce 2:1 code compression versus competing 8-bit MCUs, an important density advantage for cost-sensitive applications. Supply voltage spans 3.25 V to 6 V, with the /E suffix extending the operating range to -40C to +125C. Typical applications include appliance control, automotive body electronics, smart sensors, low-end remote controls, battery chargers, and simple LED driver controllers. The 18-SOIC footprint also supports hand-soldering in prototypes and small-series industrial systems. The RISC architecture enables deterministic interrupt response and predictable timing for hard-real-time loops, while the small code footprint allows the 512-word OTP window to absorb full application logic in many designs. When designing with the PIC16C54T-RCE/SO, observe the 6 V absolute-maximum VDD rating, provide a 0.1 uF decoupling capacitor close to VDD, and select an external clock source that meets the 4 MHz specification. Because OTP memory cannot be re-programmed, the JW (windowed) variant is recommended for firmware development and the C-revision mask set is recommended for production.

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PIC16C54T-RCE/SS - 8-Bit OTP MCU, 4MHz, 768B ROM | Microchip
PIC16C54T-RCE/SS

PIC16C54T-RCE/SS - 8-Bit OTP MCU, 4MHz, 768B ROM | Microchip

The Microchip PIC16C54T-RCE/SS is an 8-bit EPROM/ROM-based CMOS microcontroller from the PIC16C5X family, delivering up to 4 MHz instruction execution in a compact 20-pin SSOP package. According to Microchip datasheet DS30189S, the device integrates 768 bytes (512 x 12) of One-Time Programmable (OTP) program memory and 25 bytes of general-purpose RAM, with 12 digital I/O pins arranged on two ports (PORTA 4-bit, PORTB 8-bit). The 'T' suffix denotes tape-and-reel packaging; 'RC' identifies the 4 MHz RC-oscillator speed grade; 'E' marks the extended industrial temperature range (-40C to +125C). An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, data RAM, and peripheral I/O on one die. The PIC16C5X family sits inside the broader taxonomy: microcontroller → embedded processor → semiconductor IC. These legacy RISC MCUs use a Harvard architecture with separate program and data buses, a 12-bit instruction word, and only 33 single-word instructions - making them among the simplest to program of any 8-bit MCU. OTP memory is field-programmable but not erasable, targeting cost-sensitive volume production where firmware is final. Key features include a 200 ns single-cycle instruction execution (4 MHz), a 33-instruction RISC instruction set, a programmable watchdog timer with on-chip RC oscillator, an 8-bit real-time clock/counter with 8-bit prescaler, and power-on reset. The PORTA pins are multiplexed with the device's analog comparator reference and RTCC, while PORTB provides eight bidirectional digital I/O lines with programmable weak pull-ups. The device operates from 3.25 V to 6.0 V and is well suited to battery-powered and 5 V regulated designs. The PIC16C54 implements a RISC pipeline that fetches and executes each instruction in a single clock cycle (except branches, which take two). This two-stage pipeline is what gives the family its deterministic 200 ns instruction cycle at 4 MHz. The internal architecture separates EPROM program memory (12-bit wide) from RAM data memory (8-bit wide), allowing simultaneous instruction fetch and data access. The result is a low-MIPS-per-mW footprint that suits small, latency-sensitive control loops. Typical applications include low-cost consumer appliances, remote-control transmitters, sensor signal conditioning, small motor and solenoid drivers, and general-purpose logic replacement where a state-machine or delay timing function replaces discrete 74HC logic. Industrial uses include HVAC damper control, lighting ballast timing, and simple panel-meter drivers where only a handful of I/O lines are needed. When designing with the PIC16C54, observe that OTP memory cannot be re-programmed in-circuit, so plan to use the JW ceramic-windowed version for prototype code iteration and migrate to OTP or mask-ROM (CR suffix) for production. The SSOP-20 package's thermal resistance allows operation up to +125 C ambient, but consider the 5 V/4 MHz performance envelope when porting firmware from newer PIC16F1xxx parts. This page synthesizes distributor pricing, drop-in OTP PIC16C5X alternatives, and practical design notes that go beyond the manufacturer datasheet. The PIC16C54T-RCE/SS belongs to a long-running family with abundant code examples and reference designs in Microchip application notes AN545, AN556, and the Embedded Control Handbook.

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PIC16C54T-RCI/SO - 8-bit OTP MCU, 768B ROM, 25B RAM, SOIC-18 | Microchip
PIC16C54T-RCI/SO

PIC16C54T-RCI/SO - 8-bit OTP MCU, 768B ROM, 25B RAM, SOIC-18 | Microchip

The Microchip Technology PIC16C54T-RCI/SO is a member of the PIC16C5X family of EPROM/ROM-based 8-bit CMOS microcontrollers, packaged in an 18-pin SOIC (SO) wide-body surface-mount package. It integrates 768 bytes of One-Time-Programmable (OTP) program memory, 25 bytes of data RAM, and 12 configurable I/O pins, all driven by a RISC instruction set of only 33 single-word instructions. The "RC" oscillator suffix designates an external resistor/capacitor oscillator mode, while "I" denotes the industrial operating temperature range of -40C to +85C, and the "T" suffix indicates tape-and-reel packaging. What is a PIC16C5X microcontroller? It is one of the earliest generations of Microchip's PIC microcontrollers, originally introduced in the late 1980s and still in production for legacy and cost-sensitive embedded designs. PIC microcontrollers occupy the broader category hierarchy of microcontroller -> embedded controller -> semiconductor device. They use a Harvard architecture, separate program and data buses, and a RISC instruction set that allows most instructions to execute in a single 200 ns instruction cycle at a 20 MHz clock input. Key features of the PIC16C54T-RCI/SO include a 200 ns instruction cycle, single-cycle arithmetic and logic instructions (only program branches take two cycles), a 4.5 V to 5.5 V single-supply operating range, and a maximum clock input of 20 MHz. The device includes a programmable watchdog timer, a power-on reset (POR), and a 12-bit-wide instruction word that achieves approximately 2:1 code compression over competing 8-bit architectures of the era. The 12 I/O pins are bidirectional and individually programmable for direction, weak pull-up, and wake-on-change. Architecturally, the PIC16C54 uses a 12-bit program counter and a separate 5-bit register file selector. The RC oscillator mode allows the system clock to be generated by an external resistor and capacitor, trading frequency accuracy for the lowest possible bill-of-materials cost - the part can run with no external resonator or crystal. The OTP EPROM program memory is programmed once and is non-erasable, making this part suitable for volume production where firmware is final. Typical applications include low-cost appliance controllers, simple sensor interfaces, RC servo controllers, dedicated peripheral controllers, and replacement of discrete logic in legacy equipment. The wide-body SOIC-18 footprint is also popular for breadboard-friendly prototype adapters and educational kits. The industrial temperature rating allows deployment in outdoor enclosures and uncontrolled industrial environments. When designing with this device, note that OTP memory cannot be re-programmed in-circuit, so code must be fully validated before committing to production units. For development and code iteration, use the windowed CERDIP PIC16C54-JW part or the flash-based PIC16F54 successor. Estimated: at 20 MHz and 5 V, typical DC current consumption is approximately 2 mA during active execution and a few microamps in sleep mode. This page synthesizes distributor pricing, drop-in same-package alternatives from Microchip's PIC16C5X family, and practical design considerations not found in the standalone manufacturer datasheet.

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PIC16C54T-RCI/SS - 8-Bit 4MHz OTP MCU, 768B | Microchip | 20-SSOP
PIC16C54T-RCI/SS

PIC16C54T-RCI/SS - 8-Bit 4MHz OTP MCU, 768B | Microchip | 20-SSOP

The Microchip Technology PIC16C54T-RCI/SS is a cost-optimized 8-bit CMOS microcontroller from the PIC16C5X family, integrating 768 bytes of One-Time-Programmable (OTP) program memory, 32 bytes of RAM, and 12 general-purpose I/O pins in a 20-pin SSOP (Shrink Small Outline Package) supplied on tape and reel. It executes 33 single-word instructions at a 200 ns instruction cycle (4 MHz oscillator input, 20 MHz max), with single-cycle execution for all instructions except program branches which are two-cycle, and operates from a 3.0 V to 6.25 V supply. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory (ROM/EPROM/Flash/OTP), volatile data memory (RAM), and programmable I/O peripherals on one die. The PIC16C5X family belongs to the larger 8-bit microcontroller class, sits within the broader category of embedded microcontrollers, and falls under the umbrella of embedded processing semiconductors. Compared with 16-bit and 32-bit MCUs, 8-bit PIC devices remain attractive for cost-sensitive, deterministic, low-power control loops where peripheral complexity is modest. Key features of the PIC16C54T-RCI/SS include a RISC Harvard-architecture core with 12-bit wide instructions and 2:1 code compression versus typical 8-bit CISC competitors, a 25-entry hardware stack, a watchdog timer with its own on-chip RC oscillator, an 8-bit real-time clock/counter (RTCC) with programmable prescaler, and power-on reset plus brown-out protection. The /RC oscillator suffix indicates an external resistor/capacitor oscillator configuration, while the 'I' indicates the industrial -40C to +85C operating range. The 'T' suffix indicates tape-and-reel packaging; the '/SS' suffix specifies the 20-pin SSOP (5.30 mm body width). Architecture-wise, the PIC16C5X uses a fully static CMOS design with separate program and data buses (Harvard), allowing simultaneous instruction fetch and data access. The 12-bit instruction word plus 2:1 code compression means most instructions fit in a single 12-bit program word, yielding code density that typically exceeds CISC 8-bit alternatives. Typical applications include low-cost appliance controllers, simple sensor interfaces, LED lighting controllers, battery chargers, and replacement of discrete logic in white-goods and consumer devices. Designers choose the PIC16C54 for applications where price per unit, deterministic interrupt-free operation, and minimum external component count matter more than raw MIPS. When designing with the PIC16C54T-RCI/SS, ensure the RC oscillator R/C values stay within the datasheet's stability envelope (typically R = 3 kOhm to 100 kOhm, C > 20 pF). Add a 0.1 uF decoupling capacitor close to VDD and bulk-cap the supply rail if the load is highly dynamic. Programming must use Microchip's device programmer (e.g., PICSTART Plus or MPLAB PM3) before the OTP window closes - the part is not field-reprogrammable. This page synthesizes current distributor pricing, drop-in compatible alternatives, and practical design notes that complement the manufacturer datasheet, helping engineers evaluate sourcing options for the legacy PIC16C5X family.

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PIC16C54T-XT/SS - 8-bit OTP MCU, 4MHz, 768B, SSOP-20 | Microchip
PIC16C54T-XT/SS

PIC16C54T-XT/SS - 8-bit OTP MCU, 4MHz, 768B, SSOP-20 | Microchip

The Microchip Technology PIC16C54T-XT/SS is an 8-bit EPROM/ROM-based CMOS microcontroller in the PIC16C5X family, supplied in a 20-pin SSOP package (0.209", 5.30 mm width). It delivers up to 4 MHz CPU clock with a 200 ns single-cycle instruction time, 768 bytes (512 x 12) of one-time-programmable (OTP) program memory, 25 bytes of RAM, and 12 digital I/O pins. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, RAM, program memory, and I/O peripherals in one package, designed for embedded control tasks. Within the semiconductor taxonomy, the PIC16C54T-XT/SS belongs to the hierarchy: microcontroller -> embedded processor -> digital IC -> semiconductor. The PIC16C5X family uses a 12-bit-wide instruction set with RISC architecture, achieving roughly 2:1 code compression over comparable 8-bit CISC MCUs, and it executes single-cycle instructions (200 ns at 20 MHz) with only two-cycle branches. Key differentiating specifications include the 33 single-word instruction set, 12 bidirectional I/O pins, an operating voltage range of 4.5 V to 5.5 V (some sources cite 3.3 V/5 V dual supply tolerance), and tape-and-reel packaging with 1,600-piece standard quantity. The device integrates power-on reset, watchdog timer, and a programmable code-protect bit, eliminating many external components. Typical applications include low-cost consumer appliance controllers, simple sensor interfaces, LED display drivers, hobby and education platforms, and legacy industrial control retrofits. The compact SSOP-20 footprint suits space-constrained PCB designs where the OTP memory model supports volume production without mask-ROM tooling costs. When designing with this part, note that the PIC16C5X core lacks interrupts, so polling is required. Engineers should validate the OTP programming procedure (high-voltage VPP) and use the Microchip MPLAB IDE for code development.

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PIC16C54T-XTE/SO - 8-Bit OTP MCU, 4MHz, 768B | Microchip
PIC16C54T-XTE/SO

PIC16C54T-XTE/SO - 8-Bit OTP MCU, 4MHz, 768B | Microchip

The Microchip PIC16C54T-XTE/SO is an 8-bit RISC microcontroller in the PIC16C5x family, supplied in an 18-pin SOIC wide-body package on tape and reel. It integrates 768 bytes of one-time programmable (OTP) EPROM organized as 512 words x 12 bits, 25 bytes of general-purpose RAM, and a fully static CMOS core that operates from DC up to 4 MHz. According to the Microchip product page, this device is rated for 3.3 V / 5 V operation and uses 12-bit wide instructions for 2:1 code compression versus typical 8-bit competitors, reducing overall program size for cost-sensitive embedded designs. An 8-bit microcontroller is a small single-chip computer built around a CPU, program memory, data RAM, and I/O peripherals. The PIC16C5x family belongs to the broader hierarchy: microcontroller -> MCU -> embedded processor -> semiconductor. These OTP CMOS MCUs target high-volume applications where mask-ROM cost savings are not warranted and field programmability is required. The PIC16C5x architecture uses a Harvard structure with separate program and data buses, an accumulator-based ALU, and a small two-level hardware stack, which simplifies interrupts and reduces die area compared with register-based CISC 8-bit cores. Key features of the PIC16C54T-XTE/SO include a 33-instruction set, hardware multiplier-free architecture, 12 I/O pins with individual direction control, a programmable watchdog timer with its own on-chip RC oscillator, and a power-on reset circuit. The device supports sleep mode for low-power standby and has an operating temperature range typical of industrial-grade silicon. Power consumption in active mode is on the order of a few milliamperes at 5 V/4 MHz, with standby current dropping into the microampere range when sleep is engaged. Typical applications include simple logic replacement, RC timers, sensor front-end conditioning, low-end consumer appliances, and industrial control subsystems where deterministic instruction timing and a small footprint matter more than raw throughput. The wide-body 18-SOIC (0.295 inch / 7.50 mm) gives easier hand-soldering and inspection than narrow-body SO packages, while the -XTE speed designation corresponds to the 4 MHz oscillator grade with the industrial operating range. When designing with this part, allocate sufficient decoupling on VDD/VSS, keep crystal traces short, and respect the device's low drive-strength I/O limits; for designs that require re-programmability or in-circuit debugging, consider migrating to a flash-based PIC16F equivalent in the same footprint.

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PIC16C54T-XTI/SO - 8-bit 4MHz OTP MCU, 512B EPROM | Microchip
PIC16C54T-XTI/SO

PIC16C54T-XTI/SO - 8-bit 4MHz OTP MCU, 512B EPROM | Microchip

The Microchip Technology PIC16C54T-XTI/SO is an 8-bit RISC CMOS microcontroller in the PIC16C5x family, featuring 512 words (768 bytes) of one-time-programmable (OTP) EPROM program memory and 25 bytes of data RAM, housed in an 18-pin SOIC (0.295 inch / 7.50 mm body width) package supplied on Tape & Reel. The 'XT' speed grade specifies a 4 MHz maximum oscillator input, while the 'I' suffix denotes the industrial -40C to +85C operating temperature range, and the '/SO' suffix indicates the SOIC-18 package. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, data RAM, and peripheral I/O on one piece of silicon. The PIC16C5x family is one of the original Microchip baseline architectures, implementing a Harvard RISC core with 12-bit-wide instructions that yield approximately 2:1 code compression over competitive 8-bit CISC devices of its class. PIC16C54 sits at the entry of the PIC taxonomy: PIC16C54 -> PIC16C5x family -> PIC baseline -> 8-bit PIC -> Microcontroller -> Semiconductor. Its simple, deterministic instruction set enables compact code development and predictable real-time interrupt response. Key features include a 4 MHz oscillator input (XT grade), 33 single-word instructions, a 12-bit instruction word, two 8-bit I/O ports (Port A and Port B, total 12 I/O pins), an 8-bit real-time clock/counter with 8-bit programmable prescaler, power-on reset, watchdog timer with on-chip RC oscillator, and code-protection EPROM. The CMOS process keeps active supply current low while supporting 3.0V to 6.25V operation (industrial variants typically 3.0V-6.25V) and offers a power-saving SLEEP mode that wakes on pin change or watchdog timeout. The PIC16C54 architecture uses a single accumulator (W register) and a two-level hardware stack, characteristic of baseline PIC devices. The Harvard memory map separates program EPROM (512 x 12) from data RAM (25 x 8) and the 7-bit file register space. The wide 12-bit instruction word allows most instructions to execute in a single instruction cycle (4 oscillator clocks), giving an effective 1 MIPS throughput at 4 MHz - adequate for logic replacement, simple sequencer, and glue-logic consolidation duties. Typical applications include logic replacement in appliance controls, RC servo and PWM generator firmware, simple sensor interface front-ends (with external ADC), automotive interior trim controls, security keypads, low-end consumer devices, and industrial timer/counter modules. The industrial -40C to +85C range plus wide 3.0V-6.25V supply tolerance makes it robust for 5V industrial environments. The OTP EPROM is suitable for low-to-medium volume production where the final firmware is fixed before release. When designing with the PIC16C54T-XTI/SO, use the Microchip MPASM assembler and MPLAB SIM/MPLAB X IDE for code development, and the MPLAB PM3 universal programmer for OTP device programming. The XT oscillator mode requires a 4 MHz crystal or ceramic resonator with the appropriate load capacitors per the datasheet. For new designs, consider migrating to the flash-based PIC16F54 in the same 18-pin SOIC footprint, which offers identical peripherals and in-circuit programmability. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes that are not consolidated on a single manufacturer page.

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PIC16C55-10/P - 8-bit OTP MCU, 10MHz, 20 I/O, PDIP-28 | Microchip
PIC16C55-10/P

PIC16C55-10/P - 8-bit OTP MCU, 10MHz, 20 I/O, PDIP-28 | Microchip

The Microchip Technology PIC16C55-10/P is an 8-bit CMOS microcontroller from the PIC16C5x family, featuring a 12-bit wide instruction set, an 8-bit wide data path, and a maximum clock speed of 10 MHz in a 28-pin PDIP through-hole package. The device integrates 768 bytes (512 x 12) of One-Time-Programmable (OTP) program memory, 24 bytes of RAM, and 20 digital I/O pins organized across multiple ports, providing ample general-purpose digital I/O for legacy embedded control applications. A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory, working RAM, and peripheral interfaces. Within the semiconductor taxonomy, a microcontroller is a sub-category of integrated circuits (ICs), and the PIC16C5x sits in the OTP-programmable low-end 8-bit segment. The PIC16C5x architecture uses a Harvard layout with separate program and data buses, a two-level deep hardware stack, and direct/indirect/relative addressing modes, enabling compact code density and deterministic interrupt response for simple control loops. Key features include 12-bit wide instructions, 8-bit data path, seven or eight special-function hardware registers, a two-level hardware stack, a single 8-bit real-time clock/counter (TMR0), and an operating supply range of 4.5 V to 5.5 V. The 10 MHz oscillator speed grade and 4.5 V to 5.5 V VDD range target 5 V industrial and consumer designs that predate the modern 3.3 V MCU ecosystem. The 20 I/O pins are TTL/CMOS-compatible and can source/sink typical CMOS drive currents, making the part drop-in compatible with classic PIC16C5x layouts. The PIC16C55-10/P uses a classic RISC-like instruction set of approximately 33 single-word/cycle instructions, with most instructions executing in one instruction cycle (4 clock periods). The architecture prioritizes deterministic execution, low cost, and ease of programming through EPROM/OTP, which made it a workhorse in the 1990s for appliances, automotive subsystems, and industrial timers. Compared with later PIC16F parts, this OTP variant is one-time-programmable and cannot be electrically erased, which is an important design consideration for prototype flows. Typical applications include legacy industrial control boards, simple timer/counter subsystems, LED display drivers, appliance control boards, low-end security keypads, and drop-in replacements for 27-series EPROM microcontrollers in long-life OEM products. The 28-pin PDIP footprint is also convenient for breadboard prototyping, university teaching labs, and hobbyist retrocomputing projects that target the original PIC16C5x instruction set. When designing with this device, plan the OTP programming workflow early because the part cannot be re-programmed: use a PIC16C5x-compatible programmer such as the MPLAB PM3, and order pre-programmed parts through Microchip's programming service for production. Ensure VDD stays within 4.5 V to 5.5 V and that the 20 I/O pins are not loaded beyond their source/sink ratings; add a 0.1 uF decoupling cap close to the VDD pin. This page synthesizes distributor pricing, drop-in PIC16C5x family alternatives, and practical OTP-programming design notes not found in the manufacturer datasheet, helping engineers source, replace, and integrate the PIC16C55-10/P with confidence.

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PIC16C55-10/SO - 8-bit OTP MCU, 768B, 20 I/O, 10MHz SOIC-28 | Microchip
PIC16C55-10/SO

PIC16C55-10/SO - 8-bit OTP MCU, 768B, 20 I/O, 10MHz SOIC-28 | Microchip

The Microchip PIC16C55-10/SO is an 8-bit CMOS RISC microcontroller built around the PIC16C5x baseline architecture, offering 768 bytes of one-time-programmable (OTP) program memory, 24 bytes of RAM, and 20 digital I/O pins in a 28-pin SOIC wide-body (SO) package. The "-10" speed grade specifies a 10 MHz maximum oscillator input, and the part is specified for operation from 4.5 V to 5.5 V across the commercial temperature grade. It executes 33 single-word, single-cycle (200 ns at 10 MHz) instructions from a 12-bit-wide instruction word, achieving the 2:1 code compression Microchip markets for the PIC16C5x family. What is a PIC16C5x baseline MCU? The PIC16C5x family is Microchip's original baseline 8-bit microcontroller line, sitting below the mid-range PIC16 and enhanced PIC17/PIC18 in capability. Baseline MCUs use a 12-bit instruction word, a two-level hardware stack, and seven or eight special function registers. They are intended for low-cost, deterministic bit-IO and timing applications where advanced peripherals such as ADC, UART, or PWM are not required. PIC16C5x parts fall under the broader taxonomy: microcontroller -> 8-bit MCU -> embedded controller -> semiconductor. Key features of the PIC16C55-10/SO include a real-time clock/counter (TMR0) with an 8-bit prescaler, direct/indirect/relative addressing modes for both operands, a two-level deep hardware call stack, and a watchdog timer (WDT) with its own on-chip RC oscillator for recovery without external intervention. The device supports internal or external oscillator modes and offers low-power SLEEP mode with wake-up on pin change or watchdog timeout. Architecturally, the PIC16C55-10 uses a Harvard architecture with separate program and data buses, allowing instruction fetch and operand access in a single clock cycle. The OTP program memory is written using a production programmer such as the MPLAB PM3; once programmed, the code is non-volatile but not erasable, making the PIC16C55 family well suited to mature production designs where code stability has been validated. The 20 I/O pins are bidirectional and individually configurable for input or output. Typical applications for the PIC16C55-10/SO include small appliance controllers, HVAC damper and fan controls, LED chasers and decorative lighting sequencers, simple sensor readers with digital outputs, automotive body-electronics nodes, and any cost-sensitive embedded design that needs deterministic IO without an RTOS. The wide-body SOIC-28 footprint simplifies hand-soldering and rework on prototype boards compared to smaller QFN packages. A key design consideration is OTP-only program memory: firmware must be 100% verified before programming. Consider migrating to the flash-based PIC16F57 (pin-compatible in most pad-outs) if your design still needs in-field firmware updates. Use MPLAB XC8 with the baseline compiler setting for code generation. This page synthesizes real distributor pricing, parametric cross-references to PIC16C5x family pin-compatible variants, and practical design notes not consolidated on a single manufacturer page.

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PIC16C55-10/SP - 768B OTP 8-bit MCU 10MHz SPDIP-28 | Microchip
PIC16C55-10/SP

PIC16C55-10/SP - 768B OTP 8-bit MCU 10MHz SPDIP-28 | Microchip

The Microchip Technology PIC16C55-10/SP is an 8-bit CMOS RISC microcontroller from the PIC16C5X baseline family, delivering 768 bytes of One-Time-Programmable (OTP) program memory and 24 bytes of data RAM in a 28-pin SPDIP (Skinny Plastic DIP) through-hole package. It operates up to a 10 MHz clock rate from a 4.5V to 5.5V supply, providing 12 bidirectional I/O lines organized into three ports (PORTB, PORTC, and a partial PORTA-like configuration), one 8-bit timer/counter, and a watchdog timer for reliable embedded control. A baseline PIC microcontroller is a reduced-instruction-set (RISC) 8-bit MCU based on Harvard architecture, meaning program and data buses are physically separated. This family is the simplest in the PIC16C lineage, designed for cost-sensitive, low-pin-count embedded tasks. The PIC16C55 belongs to the hierarchy: PIC16C5X baseline -> PIC16 family -> 8-bit MCU -> microcontroller -> embedded processor -> semiconductor. Within an embedded system hierarchy, the baseline MCU sits beneath 16-bit and 32-bit MCUs but above simple logic ICs and timers. Key specifications include 768 bytes of OTP program memory (not rewritable; for prototyping the windowed CERDIP/JW variant is used), 24 bytes of static RAM, 12 I/O pins, a single 8-bit Timer0 module, on-chip watchdog timer with internal RC oscillator, 4.5V to 5.5V VDD range, and a maximum clock frequency of 10 MHz. The OTP memory allows pre-production volume manufacturing, while the JW windowed package supports erasure via UV exposure during development. Architecturally, the PIC16C55-10 uses a 12-bit instruction word with 33 single-word instructions and a two-stage pipeline, executing one instruction per instruction cycle (four oscillator clocks). All instructions are single-cycle except program branches, which are two-cycle. The device's RISC design delivers deterministic interrupt response and predictable timing - important for low-cost motor control, simple sensor interfaces, and discrete-logic replacement. Typical applications include appliance controls (washing machines, microwave ovens, rice cookers), battery chargers, simple motor control, LED drivers, power-tool electronics, remote controls, security sensor interfaces, and consumer toys. The -10 speed grade denotes 10 MHz maximum oscillator frequency and 400 ns instruction cycle, suitable for applications where cost is the primary driver and computational throughput is modest. When designing with the PIC16C55-10/SP, ensure a 0.1 uF decoupling capacitor is placed within 1 cm of the VDD pin and that the MCLR reset pin is pulled high through a 10 kohm resistor. The OTP memory is one-time programmable only, so consider PIC16C55/JW windowed or PIC16F54 flash equivalents for prototyping. Brown-out reset is not present on the PIC16C55; an external voltage supervisor is recommended for industrial environments. This page synthesizes distributor pricing as of 2026-09-16, drop-in same-package alternatives sourced from Microchip's official cross-reference data, parametric comparison tables, and practical design notes not collected in a single location in the manufacturer datasheet.

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PIC16C55-10E/P - 8-bit OTP MCU 10MHz 768B | 28-PDIP | Microchip
PIC16C55-10E/P

PIC16C55-10E/P - 8-bit OTP MCU 10MHz 768B | 28-PDIP | Microchip

The Microchip Technology PIC16C55-10E/P is an 8-bit CMOS OTP (One-Time-Programmable) microcontroller from the PIC16C5X family, delivering 10 MHz CPU performance with 768 bytes (512 x 12) of program memory and 24 bytes of RAM in a 28-pin PDIP (0.600") through-hole package. Headline specifications include a 4.5 V to 5.5 V single-supply operating range, 20 digital I/O pins, an extended -40 °C to +125 °C temperature grade, and an integrated watchdog timer for unattended operation. An 8-bit OTP microcontroller is a compact single-chip computer with non-volatile one-time-programmable program memory, a small RAM, and a CPU plus peripherals on one die. The PIC16C55 belongs to the broader product hierarchy: PIC16C5X -> PIC16C family -> PICmicro 8-bit microcontroller -> microcontroller -> embedded processor -> semiconductor. Engineers select OTP parts like the PIC16C55 for low-cost, fixed-function consumer and industrial products where firmware is final at production time and field reprogramming is not required. Key differentiating features include the 12-bit-wide instruction word providing roughly 2:1 code compression versus other 8-bit MCUs in its class, a low-power CMOS architecture with sleep current in the microamp range, and a Harvard bus structure separating program and data memory for deterministic execution. The 20 I/O pins each source or sink up to 25 mA, allowing direct LED and small-solenoid drive without external transistors. The integrated watchdog timer and power-on reset reduce external component count for brown, low-cost designs. Typical application domains include appliance control, security keypads, remote-control transmitters, simple sensor interfaces, hobby electronics, and low-end industrial controllers. The wide -40 °C to +125 °C extended grade suits automotive under-hood and outdoor industrial enclosures. The 28-PDIP package is favored for hand-soldered prototypes, educational kits, and low-volume production where socketed replacement simplifies field service. When designing with the PIC16C55-10E/P, plan a stable 5 V rail with adequate bulk decoupling, reserve the MCLR pin for a proper reset network, and ensure the high-current I/O pins do not exceed the package's total current budget. The OTP memory requires programming prior to final assembly since it cannot be erased or rewritten.

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PIC16C55-10E/SS - 8-Bit 10MHz OTP MCU 768B | Microchip
PIC16C55-10E/SS

PIC16C55-10E/SS - 8-Bit 10MHz OTP MCU 768B | Microchip

The Microchip Technology PIC16C55-10E/SS is an 8-bit RISC microcontroller from the PIC16C5x family, operating at 10MHz with 768 bytes of One-Time Programmable (OTP) program memory (organized as 512 words x 12 bits) and 25 bytes of data RAM, packaged in a 28-pin SSOP (Shrink Small Outline Package). A microcontroller (MCU) is a single-chip computer containing a processor core, program memory, data RAM, and integrated peripherals. PIC microcontrollers use a Harvard architecture with separate program and data buses, an accumulator-based RISC core, and 12-bit wide instructions that deliver roughly 2:1 code compression versus competing 8-bit MCUs in the same price class. The PIC16C5x family sits at the entry level of the PIC16 line, optimized for low-cost, high-volume embedded control tasks where deterministic instruction timing and OTP simplicity outweigh the need for in-system reprogrammability. Key features include a 33-instruction set, 2-level hardware stack, 12-bit instruction word, 8-bit data path, internal watchdog timer, and 20 I/O pins capable of sourcing/sinking up to 25mA per pin for direct LED drive. The wide instruction set simplifies compiler output and hand-coded assembly, while the OTP memory is factory- or field-programmable exactly once, suiting mature designs where firmware is finalized. The device operates from 2.5V to 6.0V across -40C to +125C industrial temperature range, marked by the -10E speed/temperature suffix. Architecturally, the PIC16C55 employs a 2-stage pipeline that fetches the next instruction while executing the current one, enabling most instructions to complete in a single 100ns instruction cycle at 10MHz. The OTP program memory uses EPROM cells that retain data for decades and are erasable only by UV exposure, requiring a windowed package for development iterations - the SSOP -10E/SS variant is intended for production where code is finalized. Typical applications include appliance control (washing machines, microwave ovens, rice cookers), remote controls, toy electronics, simple sensor interfaces, LED driving and chase patterns, low-end motor control via PWM, and consumer white goods where unit cost dominates BOM. The wide operating voltage and industrial temperature grade also support automotive body electronics and industrial sensor hubs. Designers should ensure the OTP memory is programmed before final PCB assembly since field updates are impossible without windowed packages. The 25-byte RAM limits data structures - complex state machines should offload variables to EEPROM external to the MCU. In-system debugging requires emulation tools since the OTP device cannot be re-flashed.

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PIC16C55-10I/P - 10MHz 8-Bit OTP MCU 768B 28-DIP | Microchip
PIC16C55-10I/P

PIC16C55-10I/P - 10MHz 8-Bit OTP MCU 768B 28-DIP | Microchip

The Microchip Technology PIC16C55-10I/P is an EPROM/ROM-based 8-bit CMOS microcontroller from the PIC16C5X family delivering 10 MIPS performance in a 28-pin PDIP (DIP-28) through-hole package. It features 768 bytes of OTP program memory, 24 bytes of RAM, and 20 digital I/O pins operating from a 4.0V to 6.0V supply at industrial temperature range -40C to +85C. What is an OTP microcontroller? An OTP (One-Time Programmable) microcontroller is a class of MCU that uses EPROM-based non-volatile memory allowing the device to be programmed a single time using a device programmer. Unlike flash-based MCUs, OTP parts cannot be reprogrammed in-circuit and are typically chosen for cost-sensitive, high-volume production where firmware is finalized before manufacture. The PIC16C5X family uses a 12-bit wide RISC instruction set with Harvard architecture, delivering 2:1 code compression versus competing 8-bit CISC architectures in its class. Key features include a 10 MHz maximum clock input, 33 single-word instructions, 2-level hardware stack, 8-bit timer/counter with 8-bit programmable prescaler, and power-on reset. The device integrates a watchdog timer, brown-out detection, and 20 mA sink/source capability per I/O pin. Power consumption is approximately 2 mA typical at 5V/4 MHz, making the PIC16C55-10I/P suitable for mains-powered industrial controls rather than battery applications. Architecturally, the PIC16C55-10I/P uses a RISC Harvard design with separate program and data buses, enabling simultaneous instruction fetch and data access. The 12-bit instruction word provides direct, immediate, and relative addressing modes plus bit manipulation. The OTP program memory is windowless (one-time-only) which reduces per-unit cost versus ceramic-windowed UV-erasable variants. The -10 speed grade denotes a 10 MHz maximum oscillator frequency. Typical applications include appliance controls, automotive body electronics, industrial sensor interfaces, and remote sensor transmitters where mature, low-cost 8-bit control is sufficient. The wide 4-6V operating range and industrial temperature rating also suit 5V industrial busses and automotive underhood environments in sealed modules. When designing with this part, verify that your firmware volume fits within the 768-byte OTP memory budget and that you are using the PIC16C5X baseline instruction set - code written for PIC16F or PIC18 cores is not portable without rewriting. Programming requires a Microchip MPLAB PM3 or compatible device programmer; this part cannot be programmed in-circuit. This page synthesizes distributor pricing, parametric comparison with same-family drop-in alternatives, and practical design notes not found in the manufacturer datasheet. Pricing reflects real-time distributor data and includes explicit cross-brand pin-compatibility guidance for obsolete or hard-to-source PIC16C5X inventory.

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PIC16C55-10I/SO - 8-bit CMOS MCU, 768B OTP, 28-SOIC | Microchip
PIC16C55-10I/SO

PIC16C55-10I/SO - 8-bit CMOS MCU, 768B OTP, 28-SOIC | Microchip

The Microchip Technology PIC16C55-10I/SO is a member of the PIC16C5X family of low-cost, high-performance 8-bit fully-static EPROM/OTP-based CMOS microcontrollers. It integrates 768 bytes of EPROM/OTP program memory (organized as 512 x 12), 25 bytes of RAM, and a 12-bit instruction word with an 8-bit data path in a 28-pin SOIC package. The device operates from a 4.5V to 5.5V single supply, runs at up to 10 MHz (the "-10" speed grade), and exposes 20 digital I/O lines across ports RA, RB, and RC. An 8-bit CMOS microcontroller (often abbreviated 8-bit MCU) is a single-chip computer built around an 8-bit data path, integrating a CPU core, non-volatile program memory (ROM/EPROM/Flash/OTP), volatile data memory (RAM), and programmable peripherals. Within the broader semiconductor taxonomy, an MCU sits under microcontroller -> embedded processor -> digital IC -> semiconductor. The PIC16C5X architecture uses a Harvard design with separate program and data buses, a 12-bit-wide instruction word enabling high code density, and a two-level hardware stack - characteristics that made the PIC family a workhorse for cost-sensitive 8-bit designs in the 1990s and early 2000s. Key features of the PIC16C55-10I/SO include a fixed hardware stack of two levels, seven or eight special-function hardware registers, direct/indirect/relative addressing modes for both data and instructions, an 8-bit real-time clock/counter (TMR0) with an 8-bit programmable prescaler, a Watchdog Timer (WDT) with its own on-chip RC oscillator, Power-On Reset (POR), and power-saving SLEEP mode. The "I" suffix denotes the industrial operating-temperature grade of -40C to +85C. The architecture uses a RISC-style instruction set with only 33 single-word single-cycle instructions; combined with the 4:1 internal clock divider relative to the external oscillator, a 10 MHz crystal yields a 2.5 MIPS instruction throughput. The OTP (one-time-programmable) EPROM allows prototype and low-to-medium-volume production programming using Microchip's MPLAB PM3 or comparable device programmers. Typical applications include consumer white goods control (washing machines, microwave ovens, coffee makers), simple sensor conditioning and display drivers, low-cost remote controls, hobbyist and education platforms, appliance user-interface replacement of discrete logic, and industrial timing/counter modules. The 28-pin SOIC footprint also makes it suitable as a drop-in upgrade path for older 8051-based designs where code density matters. When designing with this device, plan for an external clock source or crystal on OSC1/OSC2, place a 0.1uF decoupling capacitor within 5 mm of VDD, and note that the PIC16C5X family lacks interrupts and on-chip peripherals beyond TMR0/WDT - any advanced functionality (UART, ADC, PWM) must be implemented in software or added externally. Configuration word MCLR and oscillator selection bits must be set during programming and cannot be changed in-circuit. This page synthesizes distributor pricing, same-package drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, giving procurement and design engineers a single decision-ready reference for the PIC16C55-10I/SO.

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PIC16C55-10I/SP - 8-bit PIC MCU, 768B OTP, 10MHz, 28-SPDIP | Microchip
PIC16C55-10I/SP

PIC16C55-10I/SP - 8-bit PIC MCU, 768B OTP, 10MHz, 28-SPDIP | Microchip

The Microchip Technology PIC16C55-10I/SP is an 8-bit CMOS RISC microcontroller in the PIC16C5x baseline family, offering 768 bytes (512 x 12) of One-Time-Programmable (OTP) program memory, 24 bytes of RAM, and 20 digital I/O pins in a 28-pin SPDIP (Skinny Plastic DIP) through-hole package. It executes most instructions in a single 200 ns cycle (10 MHz oscillator, 4:1 divider), delivering roughly 5 MIPS of throughput at 5 V while consuming very little supply current. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, non-volatile program memory, working RAM, and peripheral I/O on one die. The PIC16C5x family uses a 12-bit wide instruction word with a RISC architecture and a two-level deep hardware stack, allowing compact code density versus typical 8-bit CISC controllers in the same price category. Within Microchip's taxonomy, the PIC16C5x sits under PIC16 baseline microcontrollers -> 8-bit PIC MCUs -> microcontrollers -> integrated circuits. Key features of the PIC16C55-10I/SP include a programmable 8-bit real-time clock/counter (TMR0) with 8-bit prescaler, direct/indirect/relative addressing modes, seven or eight special function hardware registers, a watchdog timer for reliable unattended operation, and an internal power-on reset. The "I" suffix denotes the industrial temperature grade of -40 C to +85 C, and the "-10" speed suffix specifies the 10 MHz maximum oscillator frequency. The OTP memory is factory- or field-programmable once, which is well suited to low-to-medium volume production. Architecturally, the device is built on a CMOS process with EPROM program memory that retains code without battery backup. The 20 I/O pins are grouped into three ports (RA, RB, RC) and are individually configurable for digital input or output. Power consumption is reduced through SLEEP mode with wake-up via pin change or watchdog overflow, making the part attractive for battery- and line-powered appliances. Typical applications include consumer appliances, automotive sub-systems, security and alarm panels, simple motor controls, low-end remote controls, and industrial timers. The wide 3.0 V to 6.0 V supply range and industrial temperature grade make it usable in both commercial and harsh-environment products. When designing with the PIC16C55-10I/SP, note that this is an OTP part, so firmware bugs discovered after programming require part replacement rather than re-flash. The 2-level hardware stack means interrupt service routines and deep subroutines must be carefully structured. Decouple VDD with a 0.1 uF ceramic capacitor placed within 5 mm of the supply pin. This page synthesizes distributor pricing, drop-in alternatives, and practical design guidance that the manufacturer datasheet does not present in a single view.

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