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PIC16C505/JW

PIC16C505/JW - 8-Bit 20MHz EPROM MCU 1.5KB | Microchip

The Microchip PIC16C505/JW is an 8-bit CMOS RISC microcontroller with 1.5KB (1K x 12) of UV-erasable EPROM program memory, 72 bytes of RAM, and a 14-pin ceramic DIP (CDIP) windowed package. It executes instructions in a 200 ns cycle at 20 MHz and supports a 2.5V/3.3V/5V operating range, making it suitable for development, prototyping, and field-reprogrammable applications where code iteration is required. A microcontroller is a single-chip computer that integrates a CPU, memory, and programmable I/O peripherals. The PIC16C505 belongs to the PIC (Peripheral Interface Controller) family, specifically the PIC16 sub-family, which sits within the broader 8-bit RISC microcontroller category and the embedded-system semiconductor hierarchy. Its 12-bit-wide instruction word and Harvard architecture deliver ~2:1 code compression versus typical 8-bit CISC competitors, allowing compact firmware in small program-memory footprints. Key features of the PIC16C505/JW include: 33 single-word/single-cycle instructions, an integrated 4 MHz internal RC oscillator (with external oscillator support up to 20 MHz), 12 I/O pins, a watchdog timer with on-chip RC oscillator, power-on reset, power-saving Sleep mode, and 8-bit timer/counter with prescaler. The /JW suffix denotes a ceramic DIP package with an erasure window, supporting UV-erase for iterative firmware development rather than the plastic OTP variants. The device uses CMOS EPROM-based memory (windowed for erasure), a 12-bit instruction word, and an 8-bit data path. Its wide operating voltage (2.5V-5.5V) and low power consumption allow battery-backed or unregulated-supply designs. The EPROM-based UV-erasable memory cell supports hundreds of erase/write cycles, making it well-suited to engineering development where firmware is repeatedly revised. Typical applications include industrial control logic, sensor signal conditioning, low-cost consumer appliances, hobby/educational microcontroller platforms, prototyping replacements for masked-ROM devices, and any design that benefits from a 14-pin through-hole windowed MCU for in-house reprogramming. The /JW package specifically enables UV erasure so the same silicon can be reused across firmware revisions. When designing with this device, ensure the UV-erase window remains covered with opaque tape during normal operation to prevent accidental data loss from ambient light. Note that the JW windowed package is intended primarily for development; production builds typically migrate to PIC16F505 (Flash) or PIC16C505-OTP variants for lower cost and no erasure-window handling. This page synthesizes distributor pricing, parametric alternatives, and practical design notes not found in the manufacturer datasheet.

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PIC16C505T-04E/SL

PIC16C505T-04E/SL - 4MHz 8-bit OTP MCU, 1.5KB EPROM | Microchip

The Microchip Technology PIC16C505T-04E/SL is a low-cost, high-performance, 8-bit, fully static, EPROM/ROM-based CMOS microcontroller housed in a 14-pin SOIC (SL) package supplied on tape-and-reel. The part runs at up to 4 MHz instruction-clock speed (200 ns instruction cycle), integrates 1.5 KB of EPROM program memory organized as 1K x 12 words, and provides 72 bytes of RAM plus 11 digital I/O lines. An 8-bit microcontroller (MCU) is a small, self-contained computing element built around an 8-bit data path, on-chip program and data memory, peripherals, and a CPU core. It sits within the broader taxonomy of embedded microcontrollers -> microcontrollers and processors -> integrated circuits -> semiconductors. The PIC16C505 belongs to Microchip's mid-range PIC10/12/16 architecture family, which uses a RISC instruction set of only 33 single-word instructions and Harvard memory architecture with separate program and data buses. Key features of this device include single-cycle execution on 31 instructions (200 ns at 4 MHz), two-cycle branches, a wide operating voltage range of 2.5V to 5.5V, an integrated power-on reset (POR) and brown-out detector, a watchdog timer, an 8-bit real-time clock/counter with 8-bit prescaler, and four interrupt sources. The EPROM program memory is one-time-programmable (OTP) and the device is rated for the industrial -40C to +125C operating range, designated by the "E" suffix in the part number. The "T" suffix indicates tape-and-reel packaging. Typical applications include low-cost logic replacement, timers, counters, sensor signal conditioning, small appliance controllers, white-goods user interfaces, and any volume-driven consumer or industrial application requiring a compact, deterministic 8-bit controller with low-power CMOS characteristics. The PIC16C505T-04E/SL is well suited to designs that need a small footprint (SOIC-14), modest memory, and Microchip's mature PIC tool chain (MPLAB X, MPASM, XC8). When designing with this part, consider that EPROM is OTP, so code must be correct on the first wafer-level programming pass - the -04E suffix indicates 4 MHz speed grade with the extended (industrial) temperature grade. For designs that need re-programmability, look at PIC16F505 (Flash) in the same SOIC-14 pinout; for higher endurance and in-circuit programming, prefer the Flash variant. This page synthesizes distributor pricing, same-family drop-in alternatives, and practical design notes that go beyond the manufacturer datasheet to help engineers select the right part for legacy, EOL, or cost-driven designs.

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PIC16C505T-20/SL

PIC16C505T-20/SL - 8-Bit CMOS MCU, 1.5KB OTP, 12 I/O | Microchip

The Microchip PIC16C505T-20/SL is an 8-bit, fully static, EPROM/ROM-based CMOS microcontroller delivering 200 ns instruction execution in a 14-pin SOIC (SL) package. It features 1.5KB (1K x 12) of OTP program memory, 72 bytes of RAM, 12 I/O pins, and a 20MHz internal clock rate. The PIC16C505T-20/SL suffix T indicates tape-and-reel packaging while SL denotes the 14-lead SOIC outline. This device is part of Microchip's baseline PIC16 family and targets cost-sensitive, space-constrained embedded designs. A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory, and programmable I/O peripherals. The PIC16C505 belongs to the PIC16 family of 8-bit RISC microcontrollers, sitting under the broader category of embedded processors and microcontrollers within the Integrated Circuits hierarchy. MCUs execute firmware stored in non-volatile memory (here, One-Time-Programmable EPROM) to read sensors, drive actuators, and communicate with other ICs. The 12-bit instruction word and 33-instruction RISC core yield a typical 2:1 code compression over competing 8-bit architectures, allowing more application functionality within the modest 1.5KB program space. Key features of the PIC16C505 include a 4-channel 8-bit analog-to-digital converter (ADC), two analog comparators, a watchdog timer, an 8-bit real-time timer/counter with 8-bit prescaler, and an internal oscillator. The 14-pin SOIC footprint exposes 12 general-purpose I/O lines shared with peripheral functions (ADC inputs, comparator inputs, timer clock). Wide operating voltage (2.5V to 5.5V) and commercial temperature range (0C to +70C for the -20 grade) support battery-powered and consumer applications. Architecturally, the PIC16C505 uses a Harvard RISC core with separate program and data buses, an 8-level deep hardware stack, and direct/indirect addressing modes. The 8-bit ALU operates on data memory organized as general-purpose registers plus special-function registers. A 12-bit instruction word fetches in a single cycle (200ns at 20MHz), with program branches taking two cycles. Power management includes several oscillator modes (RC, LP, XT, HS) and a power-on reset (POR) plus brown-out reset to maintain predictable startup across voltage transients. Typical applications include small appliance controls, IR remote transmitters, security sensors, lighting controllers, fan and motor PWM drivers, and low-cost consumer toys. The 12 I/O pins and integrated ADC are well-matched to read a button, a thermistor, or a potentiometer while driving a relay, LED, or buzzer without external glue logic. A critical design consideration for the PIC16C505 family is its OTP program memory - once programmed, the code is permanent and cannot be erased or rewritten. For prototyping and field-upgradable designs, the PIC16F505 (Flash-based, drop-in compatible in 14-pin SOIC) is the recommended alternative, sharing the same instruction set and peripherals but allowing in-circuit reprogramming.

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PIC16C505T-20I/SL

PIC16C505T-20I/SL - 8-Bit OTP MCU, 1.5KB, 20MHz | Microchip

The Microchip Technology PIC16C505T-20I/SL is an 8-bit CMOS ROM-based microcontroller from the PIC16C family, delivering 20 MHz (200 ns instruction execution) performance with 1.5 KB (1K x 12) of One-Time-Programmable (OTP) program memory in a 14-pin SOIC (SL) package. The 'T' suffix denotes Tape and Reel packaging, while the 'I' suffix indicates the industrial -40C to +85C operating temperature range, and the 'SL' suffix identifies the 3.90 mm-width SOIC package. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, RAM, program memory, and peripherals. The PIC16C family belongs to Microchip's baseline 8-bit architecture using a Harvard RISC design with 12-bit wide instructions, providing approximately 2:1 code compression versus competitors in the same class. Within the broader taxonomy, this device sits as: PIC16C505 -> PIC16C family -> PIC microcontroller -> 8-bit MCU -> microcontroller -> embedded IC -> semiconductor. Key features include 72 bytes of RAM, 11 digital I/O pins, 33 single-word instructions, a hardware 8-bit timer, watchdog timer, internal oscillator option, and a wide 3.0V to 5.5V supply voltage range. The PIC16C505's OTP program memory enables fast prototyping and small-to-medium volume production, while the 14-pin SOIC package supports compact PCB designs. The integrated RC oscillator reduces external component count. Technically, the PIC16C505 uses a 12-bit instruction word with single-cycle execution except for program branches (two cycles). Its RISC architecture delivers deterministic 200 ns instruction time at 20 MHz. The device supports in-circuit serial programming (ICSP) for OTP programming, low-power SLEEP mode with wake-on-pin-change, and brown-out reset protection on most variants, making it suitable for battery-powered and industrial control applications. Typical applications include consumer appliance controls, automotive body electronics, industrial sensor interfaces, low-cost remote controls, lighting ballasts, and battery chargers. The wide operating voltage (3.0V to 5.5V) and industrial temperature range suit harsh-environment deployments, while the small 14-pin footprint targets space-constrained designs. When designing with this device, note that OTP memory requires programming before deployment - unlike flash-based PIC16F505, code cannot be erased or rewritten. Allocate PCB space for the ICSP header (RB6/RB7 pins) to enable factory programming and field firmware updates if needed. This page synthesizes distributor pricing, drop-in alternatives, and engineering notes not consolidated in any single manufacturer document.

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PIC16C54-10/P

PIC16C54-10/P - 8-Bit 10MHz OTP MCU, 768B | Microchip

The Microchip Technology PIC16C54-10/P is an 8-bit EPROM/ROM-based CMOS microcontroller (MCU) from the PIC® 16C family, housed in a 18-pin PDIP through-hole package. It runs at a maximum clock frequency of 10 MHz, integrates 768 bytes (512 x 12) of One-Time-Programmable (OTP) program memory, 25 bytes of RAM, and 12 digital I/O pins. Operating from a 4.5 V to 5.5 V single supply, it is built on a fully static RISC core executing 33 single-word, single-cycle instructions over a 12-bit instruction word. What is an OTP microcontroller? An OTP (One-Time-Programmable) microcontroller is a class of embedded MCU whose program memory can be written only once via EPROM-style programming and cannot be erased or rewritten. OTP MCUs sit within the broader microcontroller taxonomy as: microcontroller -> embedded controller -> single-chip computer -> semiconductor. They are positioned between mask-ROM MCUs (cheapest at volume, programmed at wafer fab) and flash-based MCUs (reprogrammable in-circuit), and are favored for low-to-mid-volume production where the small per-unit savings of OTP outweigh the inconvenience of no field updates. Key features of the PIC16C54-10/P include a RISC architecture with 12-bit wide instructions and 8-bit wide data path, seven or eight special-function hardware registers, a two-level deep hardware stack, and direct, indirect, and relative addressing modes for both data and instructions. An 8-bit real-time clock/counter (TMR0) with an 8-bit prescaler handles basic timing, and a watchdog timer improves field reliability. The PIC16C5X core achieves approximately 2:1 code compression over competitive 8-bit MCUs because every instruction fits a single 12-bit word and executes in one cycle. Architecturally, the PIC16C54-10/P uses a Harvard-style separate program/data bus that allows instruction fetch and data access in the same cycle, providing deterministic execution. Its 33-instruction orthogonality and absence of paging or bank-switching complexity simplify assembler development for cost-sensitive designs. The 18-pin PDIP package is industry-standard and breadboard-friendly, which makes the part equally suitable for prototype, hobby, and legacy industrial production runs. Typical applications include low-cost consumer appliances, simple logic-replacement controllers, hobby electronics and educational platforms, sensor signal conditioning, LED driving, and legacy industrial control nodes. The 12 I/O pins and 4.5-5.5 V supply match the I/O requirements of older 5V logic families, easing system integration with TTL-era peripherals. When designing with this part, note that the /P suffix indicates a PDIP package rated for the commercial temperature range (0 C to +70 C) and that OTP memory cannot be re-programmed - the firmware must be fully validated before commitment. Microchip has marked the PIC16C54 as Not Recommended for new designs; engineers should consider the PIC16F54 (flash-based, pin-compatible in most footprints) for new projects.

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PIC16C54-10/SO

PIC16C54-10/SO - 8-bit OTP MCU, 10MHz, SOIC-18 | Microchip

The Microchip PIC16C54-10/SO is an 8-bit EPROM/ROM-based CMOS microcontroller from the PIC16C5x family, delivering 10 MHz maximum operating frequency in a 18-pin SOIC (7.50 mm width) surface-mount package. It is one of the original RISC-architecture PIC microcontrollers, with 33 single-word single-cycle instructions, 12-bit wide instruction words, an 8-bit wide data path, and 768 bytes of one-time-programmable (OTP) program memory organized as 512 x 12. The device exposes 12 digital I/O pins and 25 bytes of general-purpose RAM, while an 8-bit timer/counter (TMR0) handles basic event timing and pulse measurement. An 8-bit microcontroller (MCU) is a small, self-contained computing element that integrates a CPU, non-volatile program memory, working RAM, and peripheral blocks (timers, I/O, sometimes ADC/UART) on a single die. Microcontrollers occupy the tier between fixed-function ASICs and full microprocessors, sitting hierarchically under embedded computing and above discrete logic. The PIC16C5x family specifically belongs to Microchip's original low-cost, high-performance, fully static OTP/EPROM/ROM lineup; within that family the PIC16C54 is the smallest-memory variant (no ADC, no interrupts beyond TMR0 overflow), making it a stepping stone from discrete logic into programmable control. Key features of the PIC16C54-10/SO include a 4 MHz internal oscillator option, a wide 2.0 V to 6.0 V operating supply range (commercial 0C to +70C), a two-level deep hardware stack, and three addressing modes (direct, indirect, relative). The -10 speed grade specifies a 10 MHz maximum clock at 4.5 V to 5.5 V VDD, with 250 ns minimum instruction cycle. Special-function hardware registers are limited to seven or eight, keeping the core deliberately tiny. Brown-out and watchdog peripherals are absent on this original C-generation part; designers needing them should consider the PIC16C54A or PIC16F54 successors. Typical applications include low-cost consumer appliances, simple sensor and switch interfaces, LED driving sequencers, replacement of discrete 74HC logic, hobby projects, and legacy industrial controllers that were originally designed around the PIC16C5x family. Its fully static CMOS design also makes it well-suited to battery-powered and slow-clock applications where dynamic power can be minimized by lowering the oscillator frequency. When designing with this part, remember it is OTP-only and not reprogrammable in-circuit; production code must be generated by a device programmer such as the MPLAB PM3. Designers should also budget for the lack of interrupts, missing ADC, and limited stack depth - code organization must avoid heavy call nesting. This page synthesizes distributor pricing, drop-in same-brand and cross-brand alternatives, lifecycle context, and practical design notes not found on any single manufacturer or distributor page.

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PIC16C54-10/SS

PIC16C54-10/SS - 8-bit OTP MCU 10MHz 768B SSOP-20 | Microchip

The Microchip Technology PIC16C54-10/SS is an 8-bit, fully-static, EPROM/OTP-based CMOS microcontroller from the PIC16C5X family, operating at up to 10 MHz with 768 bytes (512 x 12) of one-time-programmable program memory, 25 bytes of RAM, and 12 digital I/O pins housed in a 20-pin SSOP (Shrink Small Outline Package). It is powered from a single 4.5V to 5.5V supply and integrates a 2-level hardware stack, 33 single-word/single-cycle RISC instructions, an 8-bit real-time clock/counter (TMR0), and direct/indirect/relative addressing modes for both data and instructions. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, working RAM, and peripheral interfaces. Within the broader taxonomy, the PIC16C54 sits in the legacy 8-bit OTP (One-Time Programmable) EPROM MCU class, which belongs to the microcontroller family, which itself belongs to embedded computing, a sub-domain of semiconductors. Modern descendants of this class use Flash memory rather than EPROM and include the PIC16F5X, PIC10/12/16/18 families, but the PIC16C54 architecture is still valued for cost-sensitive, high-volume, mature designs with stable firmware. Key differentiating specifications of the PIC16C54-10/SS include the 33-instruction RISC architecture delivering 2:1 code compression over typical 8-bit CISC MCUs in the same price category, a 12-bit wide instruction word with symmetrical 8-bit data path, hardware MCLR/VPP reset for in-circuit serial programming, and a watchdog timer option. The 20-pin SSOP package has a typical height of 1.75 mm and a body width of 5.30 mm, allowing compact board layouts where 18-pin DIP is too tall. Architecturally, the PIC16C54 uses Harvard memory organization with separate program and data buses, an ALU operating on any working register, and a seven-or-eight special-function hardware register set. This separation allows instructions to be fetched while data is being read or written, eliminating the von Neumann bottleneck and delivering deterministic single-cycle execution on all instructions except program branches (which take two cycles). Typical applications include remote control transmitters, automotive sub-system controllers (interior lighting, seat-position logic), battery chargers, security keypads, small appliance controls, and general-purpose logic replacement in consumer and industrial products. The 10 MHz speed grade is sufficient for state-machine-style control loops and low-speed serial protocols. Design consideration: the OTP program memory requires programming before insertion in production; for prototyping choose the PIC16C54-10/JW (windowed CERDIP) or the flash-based PIC16F54 drop-in equivalent. Use a decoupling capacitor of 100 nF on VDD within 5 mm of the pin, and keep the MCLR/VPP line short to avoid inadvertent resets from switching noise. This page synthesizes distributor pricing from DigiKey and Mouser, drop-in PIC16C5X/16F5X alternatives, and practical SSOP-20 design notes that go beyond the manufacturer datasheet alone.

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PIC16C54-10E/P

PIC16C54-10E/P - 8-bit OTP MCU 10MHz 768B | Microchip Technology

The Microchip Technology PIC16C54-10E/P is an 8-bit CMOS ROM-based microcontroller from the PIC® 16C family, featuring a 10 MHz maximum clock input, 768 bytes (512 × 12) of One-Time Programmable (OTP) program memory, 25 bytes of RAM, and 12 I/O pins in an 18-pin PDIP package. The 'E' suffix designates the Extended industrial temperature range (-40 °C to +125 °C) and the '10' indicates the 10 MHz speed grade. What is an 8-bit OTP microcontroller? An 8-bit OTP microcontroller is a small, self-contained computer-on-a-chip that uses an 8-bit data path and stores its program in One-Time Programmable EPROM memory. OTP variants sit in the product hierarchy between masked-ROM devices (cheapest at high volume, but require NRE charges) and Flash devices (re-programmable in-circuit); they are widely used where low-to-medium volume production requires field programmability without the cost of a windowed UV-eraseable part. Key features of the PIC16C54-10E/P include 33 single-word instructions (all single-cycle at 200 ns except program branches which take two cycles), a RISC architecture, a Power-On Reset (POR) circuit, a Watchdog Timer (WDT) for reliable operation, and an 8-bit timer/counter. The device operates from 3.0 V to 5.5 V and supports in-circuit serial programming (ICSP) via dedicated pins. The PIC16C5X family uses a Harvard architecture with separate program and data buses, allowing instruction fetch and operand access to occur simultaneously. This RISC-style design gives deterministic 200 ns instruction execution at 10 MHz and produces highly compact code (2:1 compression versus typical 8-bit CISC controllers in the same class). Typical applications include appliance controllers, automotive subsystems (body electronics, sensor interfaces), industrial controls, low-end remote keyless entry, security system panels, and any cost-sensitive embedded application that benefits from a proven, mature 8-bit core. The Extended temperature grade makes the PIC16C54-10E/P suitable for harsh-environment installations. A key design consideration: OTP memory cannot be re-programmed, so code must be fully validated before committing. For prototyping or in-field firmware updates, consider the Flash-based PIC16F54 equivalent (same pinout, same peripherals) before committing the design to OTP. Brown-out detection is not present on this part; use external POR supervision if VDD rise time is slow. This page synthesizes real-time distributor pricing, drop-in alternatives drawn from Microchip's own PIC16C5X family and Zilog's documented PIC16C54-to-Z86E02 upgrade path, plus practical design notes not collected in any single manufacturer datasheet.

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PIC16C54-10E/SO

PIC16C54-10E/SO - 8-bit 10MHz OTP MCU 768B | Microchip

The Microchip Technology PIC16C54-10E/SO is a 10 MHz 8-bit RISC microcontroller from the PIC16C5X family, housed in a 18-pin SOIC package and built on a low-power CMOS process. It integrates 768 bytes of OTP program memory (512 x 12-bit wide instructions), 25 bytes of general-purpose RAM, and 12 programmable I/O pins, executing each instruction in a single 200 ns cycle except for program branches. Background: an 8-bit microcontroller (MCU) is a self-contained CPU, memory, and peripheral set on a single die, designed for embedded control. The PIC16C5X architecture sits in the broader hierarchy of microcontroller -> embedded controller -> semiconductor IC. RISC (Reduced Instruction Set Computer) MCUs execute most instructions in one clock cycle, giving higher throughput per MHz than CISC designs. OTP (One-Time Programmable) memory uses EPROM cells that can be written once during production and retain the program permanently - ideal for low-cost high-volume products where firmware does not require field updates. Key features of the PIC16C54-10E/SO include 33 single-word instructions, 8-bit wide data path, 12-bit instruction word, two 8-bit I/O ports (Port A and Port B), a 4 MHz internal oscillator option, and an industrial-grade operating temperature range. Its RISC core, watch-dog timer, and reset logic make it a robust building block for simple embedded designs. Technically, the PIC16C54 uses a Harvard architecture with separate program and data buses, allowing instruction fetch and operand read to overlap. The 10 MHz oscillator (suffix "-10") yields a 100 ns internal clock and a 200 ns instruction cycle. The "E" suffix denotes the Extended (-40C to +125C) operating range, and "/SO" identifies the SOIC-18 wide-body package. This combination delivers predictable real-time performance for legacy designs. Typical applications include automotive body controllers, appliance control boards, simple sensor interfaces, LED driver controllers, and legacy industrial timer modules. Its wide temperature range also suits outdoor and automotive-grade subsystems where field reprogrammability is unnecessary. When designing with this MCU, reserve an external 4.5V-5.5V supply, a decoupling capacitor near VDD, and a pull-up on /MCLR. Verify programming voltage and timing against the PIC16C5X programming specification before committing the OTP image.

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PIC16C54-10E/SS

PIC16C54-10E/SS - 8-bit 10MHz OTP MCU 768B | Microchip 20-SSOP

The Microchip Technology PIC16C54-10E/SS is a member of the PIC16C5X family of low-cost, high-performance, 8-bit fully-static EPROM-based microcontrollers housed in a 20-pin SSOP package. It integrates a RISC CPU core running at 10 MHz, 768 bytes of One-Time Programmable (OTP) program memory organized as 512 x 12-bit words, and 25 bytes of data RAM, with 12 digital I/O pins. The 'E' suffix denotes the Extended (industrial) temperature grade of -40C to +125C. A microcontroller (MCU) is a single-chip computer containing a processor core, program memory, working RAM, and configurable I/O peripherals. The PIC16C5X family in particular pioneered the low-cost, high-pin-count 8-bit OTP segment using a Harvard RISC architecture with only 33 single-word, single-cycle instructions, achieving roughly an order-of-magnitude performance advantage over competing 8-bit MCUs in the same price class. Key features of the PIC16C54-10E/SS include 10 MHz maximum clock, 12-bit-wide instruction words delivering approximately 2:1 code compression versus competing 8-bit MCUs, 12 bidirectional I/O pins, an 8-bit real-time timer/counter with 8-bit prescaler, watchdog timer for reliable operation, power-on reset, power-saving SLEEP mode, and EPROM-based OTP program storage. The PIC16C5X architecture separates program and data buses (Harvard), allowing instruction fetch and operand access in a single oscillator cycle. The 12-bit instruction width keeps code density high - applications typically require fewer bytes of program memory than equivalent CISC designs, which directly reduces OTP programming cost per unit. Typical applications for the PIC16C54-10E/SS include low-cost consumer appliances, simple embedded controllers, sensor signal conditioning front-ends, automotive body electronics, personal-care devices, and any high-volume OTP application where the small 25-byte RAM and 768-byte program memory are sufficient. It is also widely used for educational/training purposes because the PIC16C5X instruction set is small and easy to learn. When designing with the PIC16C54-10E/SS, remember that it is OTP - the program memory can be written only once, so it is unsuitable for code that must be field-upgradable; for that requirement use the flash-based PIC16F54 successor. Operating voltage is typically 3.0 V to 6.0 V. This page synthesizes distributor pricing, drop-in pin-compatible alternatives from the same PIC16C54 family, and practical design notes not duplicated in the manufacturer datasheet, supporting both AEO citation and engineering comparison.

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PIC16C54-10I/P

PIC16C54-10I/P - 8-bit OTP MCU, 10MHz, 12 I/O | Microchip

The Microchip Technology PIC16C54-10I/P is an 8-bit, fully static, EPROM/ROM-based CMOS microcontroller from the PIC16C5X family, delivering up to 10 MHz operation in a 18-pin PDIP (P) through-hole package. It integrates 768 bytes (512 × 12) of One-Time-Programmable (OTP) program memory, 25 bytes of RAM, and 12 digital I/O pins in a RISC architecture with 33 single-word/single-cycle instructions. A microcontroller (MCU) is a single-chip computer that contains a processor core, program and data memory, and programmable I/O peripherals. The PIC16C5X family is a foundational line of low-cost, high-performance 8-bit RISC microcontrollers in the broader category hierarchy: microcontroller -> embedded processor -> semiconductor device. The "C" in PIC16C54 denotes EPROM program memory, distinguishing it from the "F" flash-based successors (PIC16F54/PIC16F84A) while preserving the same instruction set, register layout, and pinout. Key features include a two-level hardware stack, 8-bit real-time clock/counter (TMR0), direct/indirect/relative addressing modes, seven or eight special-function hardware registers, and a watchdog timer for reliable operation. The "-10" speed grade specifies a 10 MHz maximum oscillator frequency with a 100 ns instruction cycle, while the "I" suffix denotes an industrial temperature range of -40 °C to +85 °C. Wide operating voltage support (typically 2.5 V to 6.0 V or 3.0 V to 6.0 V depending on variant) makes the part adaptable to battery-powered and 5 V logic systems. The PIC16C54 architecture is intentionally minimalist — no interrupts, no on-chip peripherals beyond TMR0, no UART — which keeps code density high (12-bit wide instructions deliver roughly 2:1 compression over typical 8-bit CISC competitors). This simplicity translates to deterministic instruction timing, very low sleep current, and predictable real-time behaviour in cost-sensitive embedded designs. Typical applications include consumer appliance controllers, battery chargers, LED drivers, simple sensor interfaces, and educational/hobbyist platforms where cost per unit and deterministic timing outweigh the need for modern peripherals. The 18-pin PDIP package remains popular for breadboarding and through-hole assembly in low-volume production. When designing with this device, note that OTP memory cannot be reprogrammed — firmware bugs require physical part replacement. Designers targeting in-system reprogrammability should consider the PIC16F54 (flash, same pinout) as a pin-compatible modern alternative. This page consolidates distributor pricing, same-family pin-compatible replacements, and engineering design notes that go beyond what appears in the manufacturer datasheet.

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PIC16C54-10I/SO

PIC16C54-10I/SO - 8-bit OTP MCU, 768B, 12 I/O, 10MHz | Microchip

The Microchip PIC16C54-10I/SO is a low-cost, high-performance 8-bit CMOS EPROM-based microcontroller from the PIC16C5X family, delivering 10 MIPS performance at 10 MHz and offering 768 bytes of one-time-programmable (OTP) program memory in a 18-pin SOIC package. It is specified for industrial temperature operation (-40C to +85C) and features 25 bytes of RAM, 12 digital I/O pins, a single 8-bit timer/counter (TMR0), and a two-level hardware stack. What is an 8-bit OTP microcontroller? An 8-bit OTP microcontroller is a small CMOS processor that executes fixed-width 12-bit instructions on 8-bit data and stores its program in one-time-programmable EPROM. It belongs to the broader family of embedded microcontrollers (MCUs), which sit within the hierarchy microcontroller -> microprocessor -> integrated circuit -> semiconductor. The PIC16C5X family in particular is a classic RISC architecture from Microchip, and the PIC16C54 is its entry-level member, designed for cost-sensitive, low-pin-count applications where a simple deterministic core is preferred over a complex flash MCU. Key features of the PIC16C54-10I/SO include 33 single-word/single-cycle instructions, 2:1 code compression versus competitive 8-bit MCUs, direct/indirect/relative addressing, 8-bit real-time clock/counter (TMR0), four interrupt sources, and a power-on reset circuit. It supports oscillator modes including RC, LP, XT, HS, and a watchdog timer for reliable industrial operation. The 18-pin SOIC (SO) footprint and 10 MHz maximum clock make it suitable for compact through-hole-free designs. Architecturally, the PIC16C54 uses a Harvard-style RISC core with a 12-bit instruction word and 8-bit data path, allowing most instructions to execute in a single instruction cycle (200 ns at 20 MHz equivalent, 400 ns at 10 MHz). Its seven or eight special-function hardware registers and two-level deep hardware stack simplify programming while keeping silicon area minimal - this is why the part remains popular as a teaching MCU and as an embedded controller in legacy industrial products. Typical applications include simple consumer appliance control, sensor signal conditioning front-ends, LED display drivers, low-cost remote controls, battery chargers, and educational microcontroller kits. The industrial temperature grade (-40C to +85C) extends deployment to factory automation peripherals, HVAC control boards, and automotive aftermarket accessories. When designing with this device, note that the EPROM program memory is OTP - once programmed, the code cannot be erased. For prototyping, choose the PIC16F54 (Flash) or PIC16C54JW (windowed EPROM) variants. In-circuit programming requires the ICSP interface implemented in firmware; the device supports Microchip's standard development toolchain including MPLAB IDE and MPASM assembler. This page synthesizes distributor stock and pricing (as of 2026-09-16), drop-in same-package alternatives, and practical design notes not collated on the manufacturer product page.

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PIC16C54-10I/SS

PIC16C54-10I/SS - 8-bit OTP MCU 12 I/O 10MHz | Microchip | SSOP-20

The Microchip Technology PIC16C54-10I/SS is an EPROM/ROM-based 8-bit CMOS microcontroller delivering 10 MHz CPU performance in a 20-pin SSOP package, with 768 bytes of One-Time-Programmable (OTP) program memory, 25 bytes of data RAM, and 12 digital I/O pins. A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory, and peripherals on one die. The PIC16C54 belongs to the original PIC16C5x family of 8-bit microcontrollers, the foundational architecture that established Microchip's RISC-based mid-range core. Within the broader taxonomy it is classified as an 8-bit MCU -> embedded microcontroller -> integrated circuit -> semiconductor. Key features include 12-bit-wide instructions, an 8-bit data path, a two-level deep hardware stack, direct/indirect/relative addressing modes, and a single 8-bit real-time clock/counter (TMR0) with an 8-bit prescaler. The device supports 33 single-word instructions with a 2:1 code compression advantage over competitors, only 12 special function hardware registers, and a 4 MHz internal oscillator option on selected derivatives. Architecturally the PIC16C54 uses a Harvard-style RISC core with separate program and data buses, executed from EPROM/OTP for one-time programmable production volumes. The 10 MHz rating supports a 100 ns instruction cycle, enabling deterministic control loop execution in cost-sensitive industrial and embedded applications. Typical use cases are low-cost 8-bit control for appliance interfaces, LED drivers, simple sensor readers, and battery-powered devices. Industrial temperature grade -40C to +85C and ceramic-equivalent SSOP-20 thermal robustness make it suitable for factory floor electronics. When designing with this part, remember the 12 I/O budget is shared with the MCLR, oscillator, and TMR0 pins; verify your pin allocation against the SSOP-20 datasheet pinout. The OTP memory cannot be re-programmed, so order pre-programmed units or use the PIC16F54 flash equivalent for development iterations. This page synthesizes distributor pricing, drop-in PIC16C5x family alternatives, and practical design considerations not consolidated on the manufacturer datasheet.

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PIC16C54-H5/SO

PIC16C54-H5/SO - 8-bit 20MHz OTP MCU, 768B | Microchip

The Microchip Technology PIC16C54-H5/SO is an 8-bit CMOS RISC microcontroller from the PIC16C5x family, operating at 20 MHz with 768 bytes (512 x 12) of One-Time-Programmable (OTP) program memory in an 18-pin SOIC package. It is part of the long-running PIC16C5x legacy family of low-cost, high-performance, fully static microcontrollers designed for embedded control. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, memory, and peripherals on one die; OTPs are a class of non-volatile memory that can be written once after manufacture and are ideal for low-to-medium volume production where the firmware is finalized at board bring-up. OTP sits between ROM (mask-programmed at the fab) and Flash (re-programmable in the field) in the reprogrammability hierarchy. PIC microcontrollers belong to the broader category of microcontrollers -> embedded processors -> semiconductors, and are widely used in automotive, industrial, and consumer applications. Key features of the PIC16C54-H5/SO include a RISC architecture with 33 single-word/single-cycle instructions, 12-bit instruction width, 25 ns instruction cycle time at 20 MHz, 32 bytes of RAM, 12 I/O pins, and a programmable Watchdog Timer. The device also supports an internal/external oscillator, selectable low-power XT and HS oscillator modes, and operates across a wide voltage range. This part uses an enhanced Harvard architecture with separate instruction and data buses, allowing instruction fetch to occur in parallel with data access. The 20 MHz maximum clock and single-cycle instruction set give the PIC16C54 approximately 5 MIPS of throughput, which is sufficient for simple control loops, timing, glue logic replacement, and basic sensor interfacing. The 18-SOIC (Small Outline IC) package provides a compact, surface-mountable form factor suitable for hand-soldered prototypes and high-volume PCB assembly. Typical applications for this part include simple state machines, consumer appliance control, battery chargers, automotive body electronics, sensor signal conditioning, fan controllers, and remote-control transmitters. The wide operating range and low cost make it a common choice for legacy and replacement designs where proven firmware is already in production. When designing with this part, note that the -H5 speed suffix denotes the 20 MHz oscillator range and SO is the 18-pin SOIC package. Engineers transitioning new designs to the PIC16C54 family should evaluate newer PIC16F or PIC18 alternatives for Flash-based reprogrammability, but the PIC16C54-H5/SO remains a reliable choice for long-life, cost-sensitive products. This page synthesizes distributor pricing, drop-in alternative listings, and practical design notes for engineers maintaining legacy PIC16C5x designs not covered in the Microchip datasheet alone.

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PIC16C54-H5I/SO

PIC16C54-H5I/SO - 8-Bit 20MHz OTP MCU | Microchip | 18-SOIC

The Microchip Technology PIC16C54-H5I/SO is an 8-bit RISC microcontroller from the PIC16C5x family, delivering 20MHz operation with 768 bytes of One-Time-Programmable (OTP) program memory in a 300-mil 18-pin SOIC package. It integrates 32 bytes of RAM, 12 I/O pins, and a RISC core that executes 33 single-word single-cycle instructions, providing deterministic interrupt response within one instruction period. An OTP microcontroller (One-Time-Programmable) is a class of non-volatile programmable logic device whose program memory is implemented using EPROM cells; once written, the code cannot be erased or rewritten, which makes these parts cost-optimized for high-volume production of fixed-function embedded products. PIC microcontrollers sit within the broader taxonomy: microcontroller -> embedded processor -> semiconductor IC, and they remain one of the most widely deployed 8-bit architectures in industrial, automotive, and consumer products. Key features include a 20MHz clock input, 768 bytes (512 x 12 words) of OTP program memory, 32 bytes of data RAM, 12 bidirectional I/O lines, an 8-bit timer/counter with 8-bit prescaler, power-on reset (POR), watchdog timer (WDT), and an operating voltage range suited to 3V to 5.5V systems. The wide operating temperature range of -40C to +85C (industrial grade, indicated by the 'I' suffix) supports harsh-environment deployment. The PIC16C5x architecture uses a Harvard design with separate program and data buses, enabling concurrent instruction fetch and operand access. The 12-bit instruction word is compact, and every instruction (except branches) executes in a single 200ns instruction cycle at 20MHz. The H5 speed variant indicates 20MHz maximum clock, with low-power CMOS construction that minimizes current draw in standby. Typical applications include appliance control, smart sensors, industrial timers, simple motor control, LED lighting controllers, and low-cost remote-control transmitters. Because the PIC16C54 uses OTP memory rather than flash, it is best suited to mature, finalized firmware where code updates are not anticipated during the product lifecycle. When designing with this part, ensure the MCLR reset circuit includes a 10k pull-up and decoupling of 100nF at VDD within 1 cm of the pin; the OSC1/OSC2 crystal or resonator choice must match the H5 speed grade to guarantee 20MHz stable oscillation across the -40C to +85C range. This page synthesizes distributor pricing, drop-in same-family alternatives, and practical design notes drawn from Microchip's PIC16C5x datasheet family, providing decision support that goes beyond what any single distributor page offers.

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PIC16C54-HS/P

PIC16C54-HS/P - 8-Bit 20MHz OTP MCU, 18-PDIP | Microchip

The Microchip Technology PIC16C54-HS/P is an 8-bit, fully static, EPROM/OTP-based CMOS microcontroller in a 18-pin PDIP package. It belongs to the PIC16C5x family and executes instructions at a 20 MHz clock rate, delivering 20 MIPS of throughput from a 33-instruction RISC core. The device integrates 768 bytes (512 x 12) of OTP program memory, 25 bytes of general-purpose RAM, and 12 bidirectional I/O pins organized into two ports. What is a PIC16C5x microcontroller? The PIC16C5x is a family of low-cost, high-performance, 8-bit fully static CMOS microcontrollers using a RISC architecture with only 33 single-word/single-cycle instructions. These MCUs belong to the broader hierarchy: 8-bit microcontroller -> microcontroller -> embedded processor -> semiconductor. The 12-bit-wide instruction word provides 2:1 code compression over competing 8-bit architectures of the era, while the symmetrical instruction set reduces development time. The two-level hardware stack and direct/indirect/relative addressing modes keep silicon area minimal and power consumption low for cost-sensitive embedded applications. Key features of the PIC16C54-HS/P include an 8-bit real-time clock/counter (TMR0) with 8-bit prescaler, a watchdog timer with its own on-chip RC oscillator for reliable reset behavior, and a power-on reset (POR) circuit. The HS suffix denotes a high-speed crystal/ceramic resonator oscillator option, supporting clock frequencies up to 20 MHz. Operating voltage ranges from 3.3 V to 5.5 V across a -40C to +85C commercial temperature range, making the part suitable for both battery-powered and industrial environments. The architecture uses Harvard-style separate program and data buses to allow instruction fetch and data access to occur in a single cycle. CMOS fabrication combined with the fully static core yields standby currents in the microamp range. The seven or eight special-function hardware registers (depending on port configuration) and built-in EEPROM/ROM-based program storage mean the device runs without any external program memory or data memory, enabling single-chip embedded designs. Typical applications for the PIC16C54-HS/P include appliance control, automotive sub-system modules, simple sensor interfaces, remote controls, low-end consumer electronics, and industrial timer/counter subsystems. It is also used in legacy designs requiring a 5V, 18-pin 8-bit MCU with OTP programmability for cost-sensitive high-volume production. When designing with the PIC16C54-HS/P, note that OTP memory is one-time-programmable; once the program is committed, the device cannot be reprogrammed. For prototyping, use the PIC16C54C variant or a windowed CERDIP package. Programming requires a Microchip device programmer such as MPLAB PM3. The OTP part is targeted at mature production where firmware is finalized. This page synthesizes distributor pricing, lifecycle status, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.

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PIC16C54-HS/SS

PIC16C54-HS/SS - 8-Bit EPROM MCU 20MHz | Microchip Technology

The Microchip Technology PIC16C54-HS/SS is an 8-bit EPROM/ROM-based CMOS microcontroller from the PIC16C5X family featuring 33 single-word/single-cycle RISC instructions, 512 words of 12-bit-wide program memory, and 25 bytes of RAM in a 20-pin SSOP package. The 'HS' suffix denotes the high-speed oscillator option supporting up to 20 MHz clock input. The device operates from a single 5 V supply across the commercial 0C to +70C temperature range, and includes 12 I/O pins with individual direction control. An 8-bit microcontroller is a small computer-on-a-chip integrating a CPU, RAM, ROM/EPROM program memory, and peripherals such as timers and I/O ports onto a single die. The PIC16C5X family belongs to the broader category of microcontrollers (MCU), which sit within the integrated circuit hierarchy: microcontroller -> microprocessor -> semiconductor device -> electronic component. These MCUs are used wherever embedded logic, simple control loops, or glue logic replacement are needed in cost-sensitive designs. Key features of the PIC16C54-HS/SS include a two-level deep hardware stack for subroutine nesting, an 8-bit real-time clock/counter (TMR0) with 8-bit prescaler, direct/indirect/relative addressing modes for data and instructions, and seven or eight special function hardware registers. Its RISC architecture delivers roughly an order-of-magnitude higher performance than competing 8-bit MCUs at the same price point, with 12-bit-wide instructions providing 2:1 code compression versus 8-bit instruction MCUs. The PIC16C54 utilizes a fully-static CMOS process with EPROM program memory, allowing UV-eraseable reprogramming during development. The 12-bit instruction word and 8-bit data path are asymmetric by design - a hallmark of the PIC architecture that simplifies decoding and enables single-cycle execution. Power-saving SLEEP mode and a watchdog timer (on derivative parts) further enhance field reliability for unattended applications. Typical applications for this part include simple logic replacement in white goods and appliances, automotive sub-system controllers (under-hood lighting, seat controllers), industrial timer/counter modules, remote control transmitters, security keypads, low-end toys and educational hardware, and battery-powered sensor reading nodes. The 20-pin SSOP package offers a compact footprint suitable for space-constrained designs. When designing with the PIC16C54-HS/SS, ensure the chosen oscillator mode (HS = high-speed crystal/ceramic resonator up to 20 MHz) is matched to a crystal or resonator with appropriate load capacitors. The /SS package is the SSOP-20 variant suitable for surface-mount production. This page synthesizes distributor pricing for the PIC16C54-HS/SS, drop-in SSOP-20 alternatives, and practical design notes not aggregated in the manufacturer datasheet.

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PIC16C54-HSE/P

PIC16C54-HSE/P - 8-Bit OTP MCU 16MHz 768B | Microchip

The Microchip Technology PIC16C54-HSE/P is an 8-bit EPROM/ROM-based CMOS microcontroller from the PIC® 16C family, supplied in a through-hole 18-pin PDIP package. It integrates a RISC CPU core with 768 bytes (512 x 12) of One-Time-Programmable (OTP) program memory, 25 bytes of RAM, and runs at a maximum clock speed of 16 MHz with a 200 ns instruction cycle. The HSE suffix indicates the high-speed 16 MHz oscillator variant, the E denotes the extended (-40 °C to +125 °C) operating temperature grade, and /P confirms the 18-pin PDIP package. Background: An 8-bit OTP microcontroller is a single-chip computer built around an 8-bit data path, with non-volatile program memory that can be written once and read many times (One-Time-Programmable). OTP parts sit between mask-ROM devices (cheapest at volume, no field programming) and Flash parts (re-programmable). PIC® microcontrollers from Microchip belong to the RISC (Reduced Instruction Set Computer) hierarchy of small embedded controllers, characterized by a small instruction set, single-cycle execution, and Harvard memory architecture. They are widely deployed in cost-sensitive, deterministic embedded applications where minimal external component count and predictable timing are valued over large code space or in-system re-programmability. Key features of the PIC16C54-HSE/P include 12-bit wide instructions (giving 2:1 code compression versus typical 8-bit CISC MCUs), 33 single-word single-cycle instructions, a fully static design that allows clock stopping, a programmable code protection bit, and a power-on reset (POR) plus watchdog timer (WDT) for reliable operation in unattended environments. The device supports an operating voltage range of 2.5 V to 6.25 V (5 V nominal), with typical supply current under 2 mA at 5 V / 4 MHz and under 10 µA in standby. Architecturally, the PIC16C54-HSE/P uses a two-stage pipeline RISC core that fetches an instruction while executing the previous one, yielding nearly one MIPS per MHz. The 12-bit instruction word packs both opcode and operand, allowing very dense code. Twelve special-function registers (SFRs) handle I/O and control, and 12 digital I/O pins are brought out across the two ports (RA0-RA3, RB0-RB7). The HSE oscillator option drives the on-chip oscillator block with a high-speed crystal or external clock up to 16 MHz, supporting faster execution than the standard HS (high-speed) option without changing instruction timing. Typical applications include automotive body controllers, appliance control boards, security system sensor interfaces, low-end remote-control transmitters, and small industrial timers where cost and small code footprint matter more than in-system re-programmability. The automotive temperature grade makes the part suitable for under-hood and dashboard deployments. Designers often pair the PIC16C54 with a PICkit™ or MPLAB® PM3 programmer for production programming of the OTP array. Design considerations: the OTP memory cannot be re-programmed in-circuit, so firmware must be fully validated before burning. Use decoupling of 100 nF plus 10 µF tantalum within 5 mm of VDD, and keep the crystal traces short and guarded. The maximum I/O sink/source current is 25 mA per pin and 100 mA per port, so any higher-current load (relay, LED string) must be buffered by a transistor. Power-on reset and watchdog timer should always be enabled in safety-critical applications. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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PIC16C54-HSE/SO

PIC16C54-HSE/SO - 8-Bit 16MHz OTP MCU 768B 18-SOIC | Microchip

The Microchip Technology PIC16C54-HSE/SO is an 8-bit RISC microcontroller from the PIC16C5x family housed in an 18-pin SOIC package. The HSE suffix denotes a high-speed 16 MHz ceramic-resonator/HS oscillator variant operating over 4.5V to 5.5V with 768 bytes of One-Time-Programmable (OTP) program memory and 25 bytes of RAM, executing one instruction per 250 ns instruction cycle. As a member of Microchip's original baseline PIC family, the PIC16C54-HSE/SO delivers 12-bit wide, 33-instruction RISC architecture with fully static CMOS design. A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory (ROM/Flash/OTP), data memory (RAM), and integrated peripherals such as timers, I/O ports, and interrupts. The PIC16C5x baseline family sits at the entry tier of the Microchip PIC architecture, optimized for cost-sensitive, deterministic control tasks in appliance, automotive, and industrial applications. Within the broader taxonomy, the PIC16C54 belongs to: microcontroller -> 8-bit MCU -> PIC16 baseline -> CMOS EPROM/OTP family. This category is now largely superseded by Flash-based PIC16F1xxx parts but remains in long-lifecycle and legacy designs. Key features of the PIC16C54-HSE/SO include 12 I/O pins, 2.5 mA typical I/O source/sink, an 8-bit real-time timer/counter with 8-bit prescaler, power-on reset, watchdog timer, and code-protection. The OTP program memory is windowless (one-time programmable only) and the device is rated for industrial temperature operation from -40C to +85C, with extended grades to +125C. Power consumption is approximately 2 mA at 5V/16 MHz operating and under 1 uA in SLEEP mode. The PIC16C54-HSE/SO uses a Harvard architecture with separate program and data buses, enabling single-cycle instruction fetch plus ALU operation. Its high-speed 16 MHz external oscillator option (versus the standard 4 MHz LP oscillator of the base PIC16C54) makes the part suitable for time-critical control loops, while the RISC instruction set keeps interrupt latency deterministic at 4 cycles. The 18-SOIC package is the wide-body 300-mil SOIC, which is hand-solder friendly and compatible with most through-hole adapter boards. Typical applications include appliance control boards, automotive body controllers, security keypads, simple sensor interfaces, low-end motor control, and white-goods user-interface logic. The wide SO package and OTP memory suit designs requiring a stable firmware image for the product's lifetime without field reprogramming. When designing with the PIC16C54-HSE/SO, plan for the OTP programming step early; OTP memory cannot be erased, so firmware must be fully debugged in a windowed or Flash-based sibling (such as PIC16F54) before final code commitment. The 25-byte RAM limit and absence of hardware UART constrain this part to small, polled control loops rather than communication-heavy tasks. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, providing engineers a one-stop reference for legacy PIC16C5x designs.

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PIC16C54-HSE/SS

PIC16C54-HSE/SS - 8-Bit EPROM MCU 20MHz 768B OTP 20-SSOP | Microchip

The Microchip Technology PIC16C54-HSE/SS is an 8-bit EPROM/ROM-based CMOS microcontroller from the PIC16C5X family, featuring a 12-bit instruction word, 33 single-word/single-cycle RISC instructions, and 768 bytes (512 x 12) of one-time-programmable (OTP) program memory. Operating from a 4.5V to 5.5V supply with a maximum clock speed of 20 MHz, the device is offered in a 20-pin SSOP (Shrink Small Outline Package) and is specified for the commercial operating temperature range. What is an 8-bit OTP microcontroller? An 8-bit OTP microcontroller is a small, low-cost, fully-static computing device that integrates a CPU, program memory, RAM, and peripheral I/O on a single CMOS die. The EPROM-based OTP memory is written once using a device programmer and cannot be erased, which makes these parts economical for high-volume embedded products where code is fixed at production time. PIC16C5X MCUs occupy the entry-level tier of the 8-bit microcontroller taxonomy: microcontroller -> 8-bit MCU -> PIC family -> PIC16C5X sub-family -> CMOS RISC core with 12-bit instruction set. Key features of the PIC16C54-HSE/SS include 25 bytes of general-purpose RAM, 12 digital I/O pins arranged as three ports (PORT A, PORT B, PORT C), an 8-bit timer/counter (TMR0) with an 8-bit prescaler, a watchdog timer with its own on-chip RC oscillator, power-on reset, and a power-saving SLEEP mode. The HSE suffix designates a 20 MHz high-speed oscillator variant within the PIC16C54 range, and the SS suffix denotes the SSOP-20 industrial/commercial package. Architecturally, the PIC16C5X family uses a Harvard architecture with separate program and data buses, a 2-stage pipeline, and a RISC instruction set that executes most instructions in a single instruction cycle (4 oscillator clocks). This pipeline, combined with the static CMOS design, gives a deterministic 200 ns instruction cycle at 20 MHz. Code density is roughly 2:1 better than competing 8-bit CISC architectures because the 12-bit fixed instruction width matches the register file granularity. Typical applications include low-cost consumer appliances, automotive sub-system controllers, battery chargers, simple sensor interfaces, remote controls, LED drivers, and small industrial controllers. Because the program memory is OTP, the part is best suited to designs whose firmware is frozen at production and does not require field updates. Compared with the FLASH-based PIC16F54 successor, the PIC16C54-HSE/SS trades reprogrammability for lower unit cost in mature, stable designs. When designing with this device, note that in-circuit serial programming (ICSP) is not available on the OTP PIC16C5X family - code must be loaded by a parallel programmer such as the Microchip MPLAB PM3 before the part is soldered. Decoupling capacitors of 0.1 uF should be placed close to VDD and VSS, and unused I/O pins should be configured as outputs to minimize current draw in SLEEP mode. The 25-byte RAM budget means that deeply nested call stacks or large lookup tables must be kept in program memory. This page synthesizes distributor pricing, drop-in same-package alternatives drawn from the Microchip PIC16C5X family, and practical design notes not found in the manufacturer datasheet.

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PIC16C54-LP/P

PIC16C54-LP/P - 8-Bit 40MHz OTP MCU, 768B, 18-PDIP | Microchip

The Microchip Technology PIC16C54-LP/P is an 8-bit CMOS microcontroller from the PIC16C5x family, housed in an 18-pin PDIP (Plastic Dual In-line Package) through-hole package. It integrates 768 bytes of One-Time-Programmable (OTP) program memory organized as 512 x 12 words, 25 bytes of general-purpose RAM, and 12 digital I/O pins in a low-power (LP) speed grade optimized for low-frequency, low-current operation. A PIC16C5x microcontroller is one of the earliest commercially successful Reduced Instruction Set Computing (RISC) 8-bit microcontrollers, belonging to the broader PIC (Peripheral Interface Controller) family designed by General Instruments and commercialized by Microchip Technology. In the taxonomy of embedded semiconductors, PIC16C5x devices are entry-level OTP microcontrollers: PIC16C5x -> PIC16C -> PIC family -> 8-bit microcontroller -> MCU -> embedded semiconductor. The 12-bit-wide instruction set is highly symmetrical, delivering roughly 2:1 code compression over competing 8-bit CISC architectures in its class, which historically allowed PIC MCUs to fit more functionality into smaller program memories. Key features of the PIC16C54-LP/P include a maximum oscillator frequency of 40 MHz, an operating voltage range of 3.0 V to 6.0 V, and an ultra-low-power sleep current in the microampere range. The 12 I/O pins can source or sink up to 25 mA each, making them capable of directly driving LEDs and small relays without external drivers. Two 8-bit timer/counters, a watchdog timer with its own on-chip RC oscillator, and a 4-MHz internal RC oscillator option provide flexible timing for embedded control loops. Architecturally, the PIC16C54 uses a Harvard RISC core with separate program and data buses, a 2-stage pipeline, and 33 single-word/single-cycle instructions. This RISC architecture is what allows the device to execute most instructions in a single instruction cycle (one oscillator period x 4), giving near-1:1 MIPS-to-MHz performance. Code and stack protection are not implemented on this OTP-only device, and in-circuit debugging is unavailable because there is no ICD header. Typical applications include low-cost consumer appliance controllers, simple sensor interfaces, LED chasers, hobby electronics, educational microcontroller platforms, replacement of discrete logic in legacy industrial controls, and any application where ultra-low power consumption, deterministic timing, and small code size outweigh the need for re-programmability. When designing with the PIC16C54-LP/P, note that OTP memory means code is programmed once with a device programmer such as the MPLAB PM3 and cannot be erased. Plan prototyping carefully and consider PIC16F54 (Flash-based, same pinout) for engineering samples if in-system re-programmability is required. This page synthesizes distributor pricing, drop-in same-package alternatives drawn from the PIC16C5x family, and practical design notes not consolidated on any single manufacturer or distributor page.

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PIC16C54-LP/SS

PIC16C54-LP/SS - 8-bit OTP MCU, 768B, 12 I/O, SSOP-20 | Microchip

The Microchip PIC16C54-LP/SS is an 8-bit EPROM/OTP-based CMOS microcontroller in the PIC16C5X family, featuring 768 bytes of OTP program memory, 25 bytes of RAM, and 12 I/O pins in a 20-pin SSOP package. It operates from 3.0V to 6.0V supply, supports clock speeds up to 40 kHz in LP (low-power) oscillator mode, and provides 12-bit wide instructions with a 33-instruction RISC instruction set optimized for 2:1 code compression over competing 8-bit architectures. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program and data memory, I/O peripherals, and clock generation into one package. The PIC16C5X family belongs to the broader category of microcontrollers, which sit inside the semiconductor hierarchy as programmable logic devices used to implement embedded control functions. The "LP" suffix designates the low-power oscillator mode, which pairs with a 32 kHz watch crystal for ultra-low standby current, while "SS" denotes the SSOP (Shrink Small Outline Package) form factor. Key features include a two-level hardware stack, direct/indirect/relative addressing modes, an 8-bit real-time counter (TMR0), power-on reset, watchdog timer, and code protection. The PIC16C5X architecture delivers roughly an order-of-magnitude higher performance than competing MCUs in the same price tier, according to the manufacturer datasheet. Typical applications include low-cost embedded control nodes, appliance timers, battery-powered sensor interfaces, simple motor controllers, and remote-control transmitters. The wide 3.0V-6.0V supply range and LP oscillator mode make it well suited for energy-constrained applications drawing microamp-level standby currents. When designing with the PIC16C54-LP/SS, note that OTP (One-Time Programmable) memory cannot be erased, so development typically begins with the windowed JW-package variant before committing to the production SSOP OTP device. Program with the MPLAB PM3 Universal Device Programmer. This page synthesizes distributor pricing, drop-in pin-compatible alternatives, and practical design notes not consolidated on the manufacturer datasheet or individual distributor listings.

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PIC16C54-LPE/SO

PIC16C54-LPE/SO - 8-Bit 40MHz OTP MCU 768B | Microchip

The Microchip Technology PIC16C54-LPE/SO is an 8-bit RISC microcontroller from the PIC® 16C family featuring 768 bytes (512 x 12) of One-Time-Programmable (OTP) program memory, 25 bytes of RAM, and a maximum clock frequency of 40 MHz, all housed in an 18-pin SOIC (0.295 inch / 7.50 mm body width) surface-mount package. The "-LP" suffix denotes the low-power oscillator mode and "-E" indicates the extended commercial temperature grade; "LPE/SO" is a specific speed/temperature/package combination optimized for low-power operation. An OTP microcontroller is a type of non-volatile programmable logic device whose program memory can be written exactly once using a device programmer; after programming, the code is permanent, making OTP MCUs ideal for cost-sensitive, high-volume, fixed-function applications. Within the system hierarchy, the PIC16C54 belongs to the microcontroller -> embedded controller -> semiconductor device category, and uses a Harvard RISC architecture with only 33 single-word, single-cycle instructions. This simplicity, combined with a static CMOS core, makes the PIC16C5X family one of the original PICmicro® devices still in legacy use. Key features of this part include Power-on Reset (POR), a Watchdog Timer (WDT) for unattended operation, an internal RC oscillator option, low-power sleep mode, and 12 I/O pins with high-current sink/source capability. The 18-SOIC package supports surface-mount manufacturing with gull-wing leads and a 1.27 mm pitch, and the wide 7.50 mm body width aids hand-soldering and inspection. The PIC16C54-LPE/SO utilizes a 12-bit instruction word with a two-stage pipeline, achieving 200 ns instruction execution at the maximum 40 MHz oscillator rate. Its RISC core delivers deterministic timing suitable for bit-banged protocols, motor control sequencing, and simple state machines. The device operates from 3.0 V to 5.5 V across the commercial temperature range. Typical applications include automotive body controllers (the listed "-E" suffix indicates an extended grade), appliance control boards, security-system keypads, LED controllers, sensor signal conditioning front-ends, battery chargers, and replacement upgrades for legacy discrete-logic designs. Designers also use the PIC16C54 as a glue-logic replacement for 74-series TTL in cost-down redesigns. When designing with the PIC16C54-LPE/SO, ensure the device programmer supports the EPROM/OTP cell variant - standard FLASH programmers cannot write this part. Allow a margin of at least 20 percent on the oscillator frequency for automotive temperature excursions, and add a 100 nF decoupling capacitor adjacent to VDD. This page synthesizes distributor pricing, drop-in same-package alternatives (PIC16C54C family variants), and practical design notes not consolidated on a single manufacturer page.

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PIC16C54-LPI/P

PIC16C54-LPI/P - 8-Bit 40MHz OTP MCU, 768B | Microchip

The Microchip Technology PIC16C54-LPI/P is a 8-bit CMOS RISC microcontroller from the PIC16C5X family, featuring 768 bytes (512 x 12) of One-Time-Programmable (OTP) program memory, 25 bytes of RAM, and a 12 I/O pin count, housed in an 18-pin PDIP through-hole package. It executes instructions at up to 40 MHz (10 MHz oscillator input divided by 4) and supports the low-power (LP) oscillator mode for reduced current draw. A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory (program + data), and programmable I/O peripherals. The PIC16C5X family is part of Microchip's classic baseline 8-bit PIC architecture, which introduced the popular RISC instruction set that later scaled into PIC16 and PIC18 families. Within the broader semiconductor taxonomy, an MCU sits inside Integrated Circuits > Microcontrollers and historically served as the lowest-cost entry point for embedded control in appliances, toys, and simple industrial timers before modern Cortex-M0 and RISC-V parts displaced it in new designs. Key specifications include: 33 single-word/single-cycle instructions, a 2-level deep hardware stack, 8-bit real-time clock/counter (TMR0), direct/indirect/relative addressing modes, a watchdog timer for safety, and an operating temperature range of -40C to +85C (industrial grade). The 12-bit-wide instruction word provides 2:1 code compression over typical 8-bit CISC microcontrollers, allowing programs that would consume 1.5 KB on competing parts to fit in 768 bytes. Architecturally, the PIC16C54 uses a Harvard-style separate program/data bus, fully static CMOS design for low quiescent current, and EPROM/OTP-based program memory. Brown-out and power-on reset circuitry protect against undefined behavior during supply transients. The device targets low-cost, high-volume embedded applications where minimal pin count and deterministic interrupt-free operation outweigh the need for peripherals such as UART, ADC, or PWM. Typical applications include simple timer/sequencer logic, battery chargers, motor control (relay/coil drivers), LED blinkers, remote-control transmitters, security keypads, and appliance control boards. The wide operating temperature and OTP memory make it especially common in cost-sensitive consumer products with short life cycles. When designing with this part, use a 4 MHz to 10 MHz crystal or ceramic resonator with the LP oscillator option to minimize current consumption in battery-powered systems. Ensure MCLR is properly biased through a 10 kohm pull-up to VDD to prevent spurious resets, and place a 0.1 uF decoupling capacitor within 5 mm of the VDD pin. This page synthesizes distributor pricing, OTP/EPROM flash-family drop-in alternatives, and practical design notes not found in the original Microchip datasheet.

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PIC16C505T-20/SL - 8-Bit CMOS MCU, 1.5KB OTP, 12 I/O | Microchip

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PIC16C54-10/P - 8-Bit 10MHz OTP MCU, 768B | Microchip

PIC16C54-10/SO - 8-bit OTP MCU, 10MHz, SOIC-18 | Microchip

PIC16C54-10/SS - 8-bit OTP MCU 10MHz 768B SSOP-20 | Microchip

PIC16C54-10E/P - 8-bit OTP MCU 10MHz 768B | Microchip Technology

PIC16C54-10E/SO - 8-bit 10MHz OTP MCU 768B | Microchip

PIC16C54-10E/SS - 8-bit 10MHz OTP MCU 768B | Microchip 20-SSOP

PIC16C54-10I/P - 8-bit OTP MCU, 10MHz, 12 I/O | Microchip

PIC16C54-10I/SO - 8-bit OTP MCU, 768B, 12 I/O, 10MHz | Microchip

PIC16C54-10I/SS - 8-bit OTP MCU 12 I/O 10MHz | Microchip | SSOP-20

PIC16C54-H5/SO - 8-bit 20MHz OTP MCU, 768B | Microchip

PIC16C54-H5I/SO - 8-Bit 20MHz OTP MCU | Microchip | 18-SOIC

PIC16C54-HS/P - 8-Bit 20MHz OTP MCU, 18-PDIP | Microchip

PIC16C54-HS/SS - 8-Bit EPROM MCU 20MHz | Microchip Technology

PIC16C54-HSE/P - 8-Bit OTP MCU 16MHz 768B | Microchip

PIC16C54-HSE/SO - 8-Bit 16MHz OTP MCU 768B 18-SOIC | Microchip

PIC16C54-HSE/SS - 8-Bit EPROM MCU 20MHz 768B OTP 20-SSOP | Microchip

PIC16C54-LP/P - 8-Bit 40MHz OTP MCU, 768B, 18-PDIP | Microchip

PIC16C54-LP/SS - 8-bit OTP MCU, 768B, 12 I/O, SSOP-20 | Microchip

PIC16C54-LPE/SO - 8-Bit 40MHz OTP MCU 768B | Microchip

PIC16C54-LPI/P - 8-Bit 40MHz OTP MCU, 768B | Microchip