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PIC16C56T-HSI/SO

PIC16C56T-HSI/SO - 8-bit OTP MCU 1.75KB EPROM 12 I/O | Microchip

The Microchip PIC16C56T-HSI/SO is an 8-bit RISC microcontroller in the PIC16C5x family, featuring 1.75KB (1K x 14) of One-Time-Programmable (OTP) EPROM program memory, 25 bytes of RAM, and 12 I/O pins in an 18-pin SOIC package. The device operates from a 5V supply and integrates a precision 8-bit ALU, a single 8-bit timer/counter, and a fully static CMOS core, making it suitable for deterministic embedded control applications. An 8-bit RISC microcontroller is a single-chip computer that executes one instruction per clock cycle from a Reduced Instruction Set Computer (ISA). The PIC16C5x family sits in the legacy PIC hierarchy: PIC16C5x -> PIC16 -> 8-bit PIC microcontroller -> microcontroller -> embedded IC. This positioning makes the PIC16C56T-HSI/SO one of the original low-cost, deterministic controllers still specified in long-lifecycle industrial equipment. Key features include 20 MHz maximum clock input from the HSI (High-Speed Internal) oscillator configuration, 12 bidirectional digital I/O lines with high-current sink/source capability, an 8-bit real-time timer/counter with 8-bit programmable prescaler, watchdog timer for system reliability, power-on reset, and brown-out detection. The 18-pin SOIC (Small Outline IC) package offers a compact 7.50 mm body width suitable for through-hole-free surface-mount assembly on standard 0.1-inch PCB pitch conversion. The architecture employs a Harvard memory layout with separate program and data buses, an 11-bit instruction word, and a two-level hardware stack. Its CMOS process gives typical operating current below 2 mA at 5V/20 MHz and standby currents in the microamp range. The HSI suffix indicates the high-speed internal oscillator variant trimmed for stable operation up to 20 MHz without an external crystal, simplifying BOM for cost-sensitive designs. Typical applications include industrial control logic, appliance controllers, security alarm panels, sensor signal conditioning front-ends, and simple protocol bridges. Its deterministic instruction timing also suits motor-control timing loops and replacement of legacy discrete logic in brownfield redesigns. When designing with the PIC16C56T-HSI/SO, note that the OTP EPROM cannot be electrically erased - choose this part only for end-of-line programmed units. Provide a robust decoupling network (100 nF + 10 uF) on VDD and a 100 nF bypass on each supply pin pair, and confirm that the MCLR pin is pulled high with a proper rise time. This page synthesizes distributor pricing, drop-in PIC16C5x alternatives, and engineering design notes not found in a single manufacturer datasheet, giving procurement and embedded engineers an actionable comparison view.

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PIC16C56T-HSI/SS

PIC16C56T-HSI/SS - 8-Bit 20MHz OTP MCU 1.5KB | Microchip

The Microchip Technology PIC16C56T-HSI/SS is an 8-bit EPROM/ROM-based CMOS microcontroller in the PIC® 16C family, operating at up to 20MHz with 1.5KB (1K x 12) of One-Time-Programmable (OTP) program memory and 25 bytes of data RAM, housed in a 20-pin SSOP package. The "T" suffix indicates tape-and-reel packaging, "HS" denotes the high-speed oscillator mode, and "I" indicates the industrial temperature grade (-40°C to +85°C). It is one of the PIC16C5X family devices (alongside PIC16C54, PIC16C55, PIC16C57, and their "R" ROM-based variants), targeting cost-sensitive embedded control. An 8-bit OTP microcontroller is a single-chip computer with an 8-bit data path and program memory that can be written exactly once during production programming, balancing low unit cost against in-system reprogrammability. Within the broader product hierarchy, this places the PIC16C56 as a microcontroller -> embedded controller -> semiconductor device, ideal for high-volume, fixed-function appliances where firmware is finalized at build time. The PIC architecture uses a RISC instruction set with only 33 single-word instructions, reducing development complexity compared to CISC 8-bit alternatives. Key features of the PIC16C56T-HSI/SS include a 12-bit instruction word, 8-bit data path, 12 I/O pins arranged as PORT A (RA0-RA3) and PORT B (RB0-RB7), an integrated Watchdog Timer (WDT) for reliable operation, and Power-On Reset (POR) for deterministic startup. The device supports an external high-speed oscillator and operates across a 2.5V to 6.0V supply range with low standby current typical of CMOS implementations. The PIC16C56 employs a Harvard-style architecture with separate program and data buses, single-cycle instruction execution (except for program branches), and a two-level deep hardware stack. This results in deterministic timing suitable for interrupt-free control loops, an advantage over accumulator-based 8051-class parts in latency-sensitive tasks. The RISC core delivers roughly an order-of-magnitude performance advantage over competing 8-bit microcontrollers in the same price tier. Typical applications include consumer appliance control (washing machines, microwave ovens, remote controls), automotive sub-system modules (seat controllers, simple sensor interfaces), industrial timer/counter modules, and battery-powered instrumentation. The PIC16C56 is well suited where code is frozen at production and unit cost dominates over in-field reprogrammability. For designs requiring re-programmability or larger memory, designers typically migrate to the PIC16F57 or PIC16F84A flash-based successors. When designing with this device, note that the OTP memory cannot be erased, so firmware must be fully validated before production programming. Use Microchip's MPLAB PM3 Universal Device Programmer or equivalent gang programmer for high-volume assembly. For new designs, prefer the PIC16F-series flash-based equivalents unless the BOM cost advantage of OTP is decisive. This page synthesizes distributor pricing, drop-in same-package alternatives drawn from the PIC16C5X family, and practical design notes not consolidated on any single distributor or manufacturer page.

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PIC16C56T-LP/SO

PIC16C56T-LP/SO - 8-bit OTP MCU, 40MHz, 1.5KB EPROM, SOIC-18

The Microchip PIC16C56T-LP/SO is an 8-bit CMOS RISC microcontroller from the PIC16C5X family featuring 1.5KB (1K x 12) of One-Time Programmable (OTP) EPROM program memory, 25 bytes of data RAM, and a maximum clock speed of 40MHz, housed in an 18-pin SOIC package delivered on Tape & Reel. A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory, and programmable I/O peripherals, enabling embedded control in everything from appliances to industrial equipment. Within the broader semiconductor taxonomy, an MCU belongs to the integrated circuits (IC) family, then to microcontrollers specifically, and finally to the 8-bit RISC sub-category represented by the PIC16C5X architecture. The PIC16C56T-LP/SO embodies the classic baseline PIC architecture that established Microchip's dominance in low-pin-count embedded control. Key features include a 12-bit instruction word providing 2:1 code compression over competing 8-bit MCUs, 12 bidirectional digital I/O pins, a Power-on Reset (POR) circuit, and a Watchdog Timer (WDT) for reliable operation in noisy or unattended environments. The device operates from a 3.0V to 6.0V supply and supports oscillator configurations including RC, LP (low-power crystal), XT, and HS (high-speed crystal), selectable at runtime. The -LP suffix designates the Low-Power crystal oscillator mode optimized for 32.768 kHz or low-frequency watch crystals, drastically reducing supply current versus HS mode. The PIC16C56T-LP/SO uses a Harvard architecture with separate program and data buses, a 2-stage pipeline, and a fixed instruction set that completes most operations in a single 200ns instruction cycle at 20MHz. Its OTP EPROM allows user-programmable firmware that is mask-free, making it ideal for low-to-medium volume production. The T-suffix variant ships on Tape & Reel for high-volume surface-mount assembly. Typical applications include low-power battery-operated products, appliance controllers, security peripherals, remote keyless entry transmitters, smart sensors, and simple timer or state-machine replacement circuits. The 12 I/O pins and minimal external component count make it well-suited for cost-sensitive and space-constrained designs. When designing with the PIC16C56T-LP/SO, choose the LP oscillator mode for sub-1MHz clock frequencies where current consumption must be minimized, and ensure POR is enabled in the configuration word for reliable cold-start behavior. The OTP EPROM cannot be re-programmed in-circuit, so development should begin with a windowed CERDIP PIC16C56JW or a flash-based PIC16F equivalent before committing to the OTP version for production. This page synthesizes distributor pricing, drop-in PIC16C5X family alternatives, and practical design notes that complement the manufacturer datasheet's parametric focus.

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PIC16C56T-LP/SS

PIC16C56T-LP/SS - 8-Bit 40MHz OTP MCU 1.5KB | Microchip

The Microchip Technology PIC16C56T-LP/SS is an 8-bit EPROM/ROM-based CMOS microcontroller from the PIC16C5X family, featuring 1.5KB (1K x 12) of One-Time Programmable (OTP) program memory and operating at speeds up to 40 MHz. Housed in a 20-pin SSOP (Shrink Small Outline Package) supplied on tape and reel, this device is designed for high-performance, cost-sensitive embedded control applications. The "T" suffix indicates tape-and-reel packaging, while "LP" denotes the low-power oscillator variant supporting frequencies from DC up to 40 MHz, and "/SS" specifies the 20-pin SSOP package. A PIC16C5X microcontroller is a member of the RISC (Reduced Instruction Set Computer) 8-bit microcontroller family pioneered by Microchip in the mid-1990s. These devices occupy a specific niche in the taxonomy: PIC microcontroller -> 8-bit MCU -> RISC microcontroller -> EPROM/ROM-based embedded controller. PIC16C5X devices use 12-bit wide instructions, which deliver roughly 2:1 code compression over competitive 8-bit architectures, allowing more functionality in a smaller program memory footprint. The Harvard architecture separates program and data buses for predictable, deterministic execution. Key features include 25 general-purpose I/O pins, a watchdog timer for system reliability, power-on reset, and an operating voltage range of 3.0V to 5.5V that supports both 3.3V and 5V system designs. The device offers low-power consumption with multiple oscillator options including crystal, ceramic resonator, and RC modes. The 12 I/O pins can source or sink sufficient current to directly drive LEDs and small relays, simplifying BOM and reducing external component count. Typical applications span appliance controls, automotive subsystems (body and interior), industrial automation sensors, security and alarm panels, and battery-powered consumer products. Because the program memory is OTP, the device is best suited for high-volume production where code is finalized, rather than for prototyping or field-upgradable firmware. When designing with this part, note that OTP memory cannot be erased or rewritten, so development and code iteration should use a windowed (UV-erasable) or Flash-based equivalent from the same family, then transition to the OTP part for production. Always include decoupling capacitors close to VDD and use proper oscillator layout techniques.

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PIC16C56T-LPE/SS

PIC16C56T-LPE/SS - 8-Bit 40MHz OTP MCU 1.5KB | Microchip

The Microchip PIC16C56T-LPE/SS is an 8-bit RISC PIC microcontroller featuring a 12-bit instruction word, 1.5 KB (1K x 12) of One-Time Programmable (OTP) EPROM program memory, and 25 bytes of general-purpose RAM. Housed in a 20-pin SSOP package and operating from 3.3 V/5 V supplies between 2.5 V and 6 V, it executes instructions at up to 40 MHz and offers 12 general-purpose I/O pins alongside integrated Power-On Reset (POR) and Watchdog Timer (WDT) peripherals. The 'T' suffix indicates Tape & Reel packaging, 'LP' denotes the low-power CMOS process, 'E' specifies the extended (-40 °C to +125 °C) industrial temperature range, and '/SS' confirms the 20-SSOP pinout. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, memory, and peripherals. The PIC16C5X family belongs to the broader category of microcontrollers -> embedded controllers -> semiconductor ICs. It uses a RISC architecture with only 33 single-word/single-cycle instructions, delivering 2:1 code compression versus competitors in its class and dramatically reducing development time. The PIC core's deterministic instruction pipeline makes it ideal for real-time control loops where predictable timing is critical. Key features of this part include 1024 words of OTP program memory organized as 1K x 12, hardware Power-On Reset that holds the device in reset until VDD reaches a valid threshold, a Watchdog Timer for unattended recovery from code faults, an external oscillator interface, and an automotive-grade temperature rating that supports under-hood and industrial cabinet deployments. The fully static CMOS design enables operation down to DC clock speeds for ultra-low-power sleep modes. Typical applications for the PIC16C56T-LPE/SS include industrial automation controllers, consumer-electronics user-interface boards, automotive body and accessory ECUs, low-cost sensor interface modules, and legacy equipment retrofits where PIC16C5X compatibility is mandatory. The 1.5 KB program space is sufficient for tightly written state machines and timing-critical control loops. The combination of OTP memory (cost-optimized for medium volumes) and extended-temperature grade also makes the part attractive for sealed outdoor enclosures. When designing with the PIC16C56T-LPE/SS, note that OTP memory cannot be electrically erased, so code must be fully validated in EPROM or flash prototyping variants before committing to the OTP build. Program the device using the MPLAB PM3 Universal Device Programmer or an equivalent production programmer, and reserve the Watchdog Timer as a fail-safe against firmware lock-ups in field-deployed units. This page synthesizes distributor stock and pricing, drop-in same-package alternatives from the PIC16C5X family, and practical design notes not found in the standalone Microchip datasheet, giving component engineers a one-stop selection guide for legacy 8-bit control designs.

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PIC16C56T-LPI/SO

PIC16C56T-LPI/SO - 8-Bit OTP MCU 1.5KB | Microchip

The Microchip Technology PIC16C56T-LPI/SO is an 8-bit PIC16C-family microcontroller (MCU) built around a RISC core, integrating 1.5KB of One-Time Programmable (OTP) program memory organized as 1K x 12 words, 25 bytes of RAM, and a maximum operating frequency of 40 MHz. The part is housed in an 18-pin SOIC (SO) package supplied on tape and reel (T/R). Its compact die, EPROM/ROM-based program storage, and 12-bit-wide instruction set deliver roughly twice the code density of competing 8-bit MCUs in the same price class, making it a strong fit for cost-sensitive, high-volume embedded designs. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, working RAM, and peripheral I/O on one die. The PIC16C5X family sits at the base of the Microchip PIC hierarchy: PIC16C5X -> PIC16C -> PIC mid-range 8-bit MCU -> 8-bit microcontroller -> embedded MCU. OTP variants use windowless EPROM cells that are programmed once and cannot be erased, suiting applications where firmware is fixed and per-unit programming cost must be minimized. Key features of the PIC16C56T-LPI/SO include: 1.5KB OTP program memory (1K x 12), 25 bytes RAM, 12 I/O lines, a 4 MHz internal RC oscillator option, an 8-bit timer/counter, watchdog timer, power-on reset, brown-out detect, and an industrial-grade operating temperature range of -40C to +85C. The wide 2.5 V to 6.25 V supply range lets the same part serve 3.3V and 5V rails. Because OTP memory cannot be erased in-circuit, designers who need field-updateable firmware should pick a Flash-based sibling such as PIC16F54. Architecturally, the device uses a Harvard-style RISC core with a 12-bit instruction word and an 8-bit data path, fed by an instruction pipeline that lets most instructions execute in one oscillator cycle. Program memory is implemented as one-time-programmable EPROM, accessed through a 12-bit program counter; on-chip peripherals include a general-purpose 8-bit timer with programmable prescaler, a watchdog timer with dedicated on-chip RC oscillator, and a power-up timer that holds the device in reset until Vdd is stable. Brown-out detect guards against code corruption on a sagging supply. Typical applications include low-cost consumer appliances, automotive interior subsystems, white-goods controllers, simple sensor signal conditioning, and any high-volume edge device where the program is locked at production and board space is constrained. The 18-SOIC footprint drops onto standard 300-mil SOIC land patterns used across a generation of 8-bit designs. When designing with this part, keep Vdd bypassed with a 100 nF ceramic placed within 5 mm of the Vdd pin, and respect the OTP-programming voltage and timing windows documented in the PIC16C5X family datasheet. Because OTP memory cannot be re-programmed, prototype firmware development should be done on a JW (windowed) or Flash-based PIC16F54 before committing the OTP order. This page synthesizes distributor pricing, same-brand drop-in alternatives, and practical design notes not found in the manufacturer datasheet, giving engineers and buyers a single reference for the PIC16C56T-LPI/SO.

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PIC16C56T-RC/SS

PIC16C56T-RC/SS - 8-Bit 4MHz OTP MCU, 20-SSOP | Microchip

The Microchip Technology PIC16C56T-RC/SS is an 8-bit RISC EPROM/ROM-based CMOS microcontroller from the PIC16C5X family, delivering 4MHz operation with 1.5KB (1K x 12) of One-Time-Programmable (OTP) program memory and 25 bytes of data RAM in a 20-pin Shrink Small-Outline (SSOP) surface-mount package. What is a PIC16C5X microcontroller? The PIC16C5X is a family of low-cost, high-performance, fully static 8-bit CMOS microcontrollers built on a RISC architecture. They use 12-bit-wide instructions that are highly symmetrical, achieving roughly 2:1 code compression over other 8-bit microcontrollers in their class. This family sits within the broader 8-bit MCU category alongside 8051, AVR, and PIC18, and is widely used in cost-sensitive embedded applications where simple I/O control is the primary function. The PIC16C56T-RC/SS features 12 digital I/O pins, a Power-On Reset (POR), a Watchdog Timer (WDT), and a programmable Timer peripheral. The "RC" oscillator designator indicates an external resistor/capacitor clock configuration, providing low-cost timing for non-critical-frequency applications. The "T" suffix denotes tape-and-reel packaging for high-volume assembly, and the "/SS" suffix specifies the 20-SSOP (5.30mm body width) package. Architecturally, the PIC16C56T-RC/SS uses a Harvard-style separate code/data bus design with a 33-instruction set, 2-level hardware stack, and direct/indirect addressing modes. The 4MHz internal clock rate yields a 1 microsecond instruction cycle, with most instructions executing in a single cycle, providing predictable real-time behavior. Typical applications include consumer appliance controllers, simple sensor interfaces, LED driver controllers, low-end remote controls, battery chargers, and white-goods subsystems. The wide 2.0V to 6.0V operating range (per PIC16C5X family datasheet) and CMOS low-power design make it suitable for both line-powered and battery-powered products. Design consideration: Because OTP memory cannot be re-programmed, design teams should validate firmware on a windowed (JW) or Flash-based equivalent such as PIC16F54 before committing to production. Adequate decoupling (100nF + 10uF bulk) near VDD is recommended, and the MCLR pin should be pulled high through a 10k resistor for reliable Power-On Reset. This page synthesizes distributor pricing, pin-compatible drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.

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PIC16C56T-RCE/SO

PIC16C56T-RCE/SO - 8-bit 4MHz 1.5KB OTP MCU 18-SOIC | Microchip

The Microchip PIC16C56T-RCE/SO is an 8-bit RISC microcontroller from the PIC16C5X family, featuring 1.5KB (1K x 12) of One-Time-Programmable (OTP) EPROM program memory and 25 bytes of data RAM in a surface-mount 18-pin SOIC (7.50 mm / 0.295 in width) package on tape and reel. It executes instructions at up to 4 MHz from a 3.0V-5.5V supply and uses a 12-bit-wide instruction word that delivers roughly 2:1 code compression versus competing 8-bit controllers in its class. A microcontroller (MCU) is a single-chip computer that integrates a CPU, non-volatile program memory, volatile data RAM, and I/O peripherals on one die. Within that hierarchy, the PIC16C56 sits inside the EPROM/ROM-based CMOS sub-family of legacy 8-bit controllers, which Microchip positions as the lowest-cost entry into the PIC architecture. The R in the part code indicates the industrial operating-temperature range; the C denotes EPROM program memory; the T suffix indicates tape-and-reel packaging; and the SO suffix designates the 18-pin small-outline IC package. Key features include 12 I/O pins, Power-On Reset (POR), Watchdog Timer (WDT) with its own on-chip RC oscillator, a 4 MHz internal or external clock option, and a 2-level hardware stack. The OTP EPROM supports one-time field programming via standard EPROM programmers, allowing code to be set at the factory or in production. The 8-bit accumulator-based architecture and 33 single-word instructions keep code development time short. Typical applications include low-cost consumer appliances, remote controls, simple sensor interfaces, smart toys, automotive sub-modules, and any cost-driven embedded product that benefits from Microchip's mature PIC toolchain. The 18-SOIC footprint allows easy hand-soldering or reflow on hobby and small-volume boards. When designing with this device, plan for OTP programming at production time (no in-system field updates), use the WDT for unattended recovery, and verify timing at the chosen Vdd, because the 4 MHz rating scales down at lower supply voltages. This page synthesizes distributor pricing, drop-in PIC16C5X family alternatives, and practical design notes not collected in the original Microchip datasheet.

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PIC16C56T-RCE/SS

PIC16C56T-RCE/SS - 8-Bit 4MHz OTP MCU 1.5KB | Microchip

The Microchip Technology PIC16C56T-RCE/SS is an 8-bit PIC® 16C-series CMOS microcontroller integrating 1.5KB (1K x 12) of One-Time Programmable (OTP) program memory and 25 bytes of RAM, housed in a 20-pin SSOP package. It executes instructions at a maximum clock speed of 4MHz, supports a supply voltage range of 3.25V to 6V, and provides 12 configurable I/O pins with 25 mA source/sink capability per pin. A microcontroller (MCU) is a single-chip computer that contains a CPU core, program memory, data memory, and integrated peripherals such as timers, reset circuits, and I/O. PIC® 16C microcontrollers belong to the original OTP/EPROM-based family of Microchip's 8-bit RISC architecture, sitting in the hierarchy: PIC16C5x -> 8-bit PIC MCU -> microcontroller -> embedded processor. They are widely used in cost-sensitive, low-power, deterministic control applications where flash reprogrammability is not required. Key features include 33 single-word/single-cycle RISC instructions, 8-bit timer/counter with 8-bit programmable prescaler, Power-On Reset (POR), Watchdog Timer (WDT) with on-chip RC oscillator, and code protection. The RISC Harvard bus architecture achieves an instruction execution rate close to one instruction per clock cycle, with 2 MHz oscillator input producing a 1 µs instruction cycle. The PIC16C56T-RCE/SS uses CMOS EPROM technology for the program memory and static RAM for data. The 'T' suffix indicates tape-and-reel packaging, 'RC' denotes the 4MHz RC-oscillator-based clock mode with extended temperature range, and 'E' specifies the industrial -40°C to +125°C operating range. The 20-SSOP package provides compact surface-mount integration. Typical applications include automotive body controllers, appliance control boards, security-system keypads, low-end remote controls, and industrial sensor interfaces. Its wide operating voltage and temperature range make it suitable for harsh-environment embedded designs. When designing with this device, note that OTP memory cannot be re-programmed - firmware bugs require replacement of the MCU. The on-chip WDT must be enabled in firmware and periodically cleared to recover from software lockups, and unused I/O pins should be configured as outputs to minimize quiescent current. This page synthesizes distributor pricing, drop-in same-package alternatives from the PIC16C5x family, and practical design notes not consolidated on the manufacturer datasheet.

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PIC16C56T-RCI/SO

PIC16C56T-RCI/SO - 8-Bit 4MHz OTP MCU 1.5KB | Microchip

The Microchip Technology PIC16C56T-RCI/SO is an 8-bit RISC microcontroller from the PIC16C5X family, featuring a 4MHz maximum clock, 1.5KB (1K x 12) of One-Time Programmable (OTP) EPROM program memory, and 25 bytes of RAM, housed in a 18-pin SOIC package supplied on tape and reel. The PIC16C56T-RCI/SO integrates 12 I/O pins, a watchdog timer, power-on reset, and a programmable code-protection feature set, making it suitable for embedded control tasks in cost-sensitive applications. An 8-bit OTP microcontroller is a single-chip computer built around an 8-bit data path, executing one instruction per internal cycle and storing its program in EPROM that can be written exactly once. These devices sit in the hierarchy of microcontroller -> embedded controller -> semiconductor, and the PIC16C5X family specifically targets simple control loops, glue logic replacement, and low-cost consumer/industrial products where flash reprogrammability is unnecessary. Key features include a Harvard architecture with separate program and data buses, 33 single-word/single-cycle instructions, a 4MHz maximum operating frequency yielding 1MHz instruction throughput (4:1 clock-to-instruction ratio), and an operating voltage range of 3.0V to 5.5V supporting both 3.3V and 5V rails. The 12-bit wide instruction set delivers typical 2:1 code compression over comparable 8-bit CISC microcontrollers, reducing program memory pressure on the 1K-word code space. The PIC16C56T-RCI/SO employs a fully static CMOS design with low-power consumption, an internal RC oscillator option, and brown-out/reset circuitry suitable for battery-backed and mains-powered installations. The 18-pin SOIC (0.295 inch / 7.50 mm width) package provides a compact through-hole-compatible surface-mount footprint compatible with hand-soldering and standard 300-mil SOIC land patterns. Typical applications include appliance control boards, HVAC thermostat interfaces, simple sensor signal conditioning front-ends, low-end remote controls, and industrial timer/counter modules. Designers also use the PIC16C56 in battery-powered sensor interfaces where its CMOS sleep current and internal oscillator minimize external component count. When designing with this part, note that OTP memory cannot be re-programmed - choose the PIC16F56 flash-based alternative for prototyping and field updates. The 18-pin SOIC shares a pinout with most PIC16C5X family members (PIC16C54/55/57), enabling easy migration between family variants when memory or peripheral requirements change. Always validate code-protection settings before committing to OTP production programming. This page synthesizes distributor pricing, drop-in PIC16C5X alternatives, and practical design notes that complement - not duplicate - the manufacturer datasheet.

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PIC16C56T-XT/SS

PIC16C56T-XT/SS - 8-Bit OTP MCU, 4MHz, 1.5KB | Microchip

The Microchip Technology PIC16C56T-XT/SS is a low-cost, high-performance 8-bit CMOS OTP microcontroller from the PIC16C5X family, packaged in a 20-pin SSOP (5.30mm body width). It integrates 1.5KB (1K x 12) of One-Time Programmable program memory, 25 bytes of RAM, and 12 general-purpose I/O lines, executing instructions at 4MHz from an external resonator or crystal. The device operates from a supply voltage range of 3.25V to 6.25V across a 0C to +70C commercial temperature window. An OTP (One-Time Programmable) microcontroller is a type of non-volatile programmable logic device in which the program memory can be written exactly once after manufacture. The PIC16C5X architecture belongs to the broader 8-bit MCU family (hypernyms: microcontroller -> MCU -> embedded controller -> semiconductor). The RISC instruction set offers 33 single-word, single-cycle instructions, which simplifies code development and accelerates interrupt latency to a deterministic single instruction cycle. The /SS suffix indicates the SSOP-20 surface-mount package, and the /XT speed grade specifies a 4MHz external oscillator input. Key features include 12 bidirectional I/O pins, an 8-bit timer/counter, a watchdog timer for code-lockup recovery, power-on reset, and code-protection fuses. The device is fully static, allowing the clock to be stopped without losing register state. Power consumption is low thanks to the CMOS process, with standby currents well under 1mA. The device uses an external RC, XT, HS, or LP oscillator (the XT grade targets a 4MHz crystal or ceramic resonator). Typical applications include industrial control, consumer electronics, automotive subsystems, sensor signal conditioning, simple motor control, and appliance control. The 12 I/O pins are sufficient to drive LED indicators, read button inputs, scan keypads, and interface to SPI or bit-banged peripherals. The 4MHz CPU clock supports timing-sensitive tasks like IR remote control decoding, PWM-style output toggling, and basic serial communication at 9600 baud. When designing with the PIC16C56T-XT/SS, remember that OTP memory cannot be re-programmed, so firmware must be fully validated before final programming. Ensure that the crystal/oscillator layout follows the 4MHz XT-grade guidelines to avoid start-up failures. For new designs, consider PIC16F-series flash replacements to enable field firmware updates.

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PIC16C56T-XTI/SO

PIC16C56T-XTI/SO - 8-Bit 4MHz OTP MCU 1.5KB | Microchip

The Microchip Technology PIC16C56T-XTI/SO is an 8-bit EPROM/ROM-based CMOS microcontroller in the PIC16C5X family, supplied in a tape-and-reel 18-pin SOIC (7.50 mm body width) package. The die delivers 4 MHz maximum clock frequency, 1.5 KB (1K x 12) of One-Time-Programmable (OTP) program memory, and 25 x 8 bytes of general-purpose RAM, drawing from the legacy 12-bit instruction-word PIC architecture. Background: A PIC microcontroller is a single-chip computer that integrates a CPU core, program memory, RAM, and I/O peripherals on one piece of silicon. The PIC16C5X family is the lowest-tier PIC family, using a 12-bit instruction set, an 8-bit data path, and RISC-like fixed instruction timing. It belongs to the broader taxonomy: microcontroller -> 8-bit MCU -> CMOS OTP MCU -> PIC16C5X family. OTP devices are programmed once with a device programmer (such as the MPLAB PM3) and are not field-reprogrammable, making them well suited to high-volume, fixed-function products where firmware is finalized before production. Key features include a Power-On Reset (POR) block that initializes the device on Vdd rise, a Watchdog Timer (WDT) that resets the device on code lock-up, an internal oscillator option that reduces external component count, and a 12-bit wide instruction word that compresses frequently used operations into single-cycle instructions. The PIC16C5X family operates over a 2.5 V to 5.5 V Vdd range (industrial) and supports a wide industrial temperature window, making it well matched to factory-floor embedded designs. The 'XT' speed grade specifies a 4 MHz crystal/ceramic-resonator clock mode, and 'I' denotes the industrial operating-temperature grade. Typical applications include appliance controllers, security-system keypads, low-end remote controls, sensor signal-conditioning front-ends, and white-goods motor-control boards. The industrial temperature grade allows deployment in outdoor enclosures and automotive under-hood sub-assemblies where commercial-grade parts would drift or fail. Because OTP memory cannot be rewritten in-circuit, PIC16C56T parts are most often used in mature designs where firmware has already been qualified. When designing with this MCU, verify that your in-circuit emulator or device programmer (PM3, PICSTART Plus) supports the PIC16C56 device ID and the 18-pin SOIC socket adapter. The EPROM die is erasable with a quartz-window ceramic package variant (PIC16C56/JW); the plastic SOIC version here is OTP only and not UV-erasable.

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PIC16C57-10/P

PIC16C57-10/P - 8-Bit OTP MCU 3KB EPROM 20 I/O | Microchip

The Microchip Technology PIC16C57-10/P is an 8-bit RISC microcontroller from the PIC16C5x family, featuring 3KB (2K x 12) of One-Time-Programmable (OTP) EPROM program memory, 72 bytes of RAM, and 20 digital I/O pins. Housed in a 28-pin PDIP (0.600", 15.24mm) through-hole package, it operates at up to 10MHz clock frequency from a 3.3V or 5V supply, drawing CMOS-class low power. An 8-bit microcontroller (MCU) is a single-chip processor that integrates a CPU, program memory, data memory, and peripheral I/O onto one die. Within the broader hierarchy, the PIC16C57 belongs to the category of 8-bit microcontrollers -> microcontrollers -> microprocessors -> digital ICs -> semiconductors. The 'C' in PIC16C57 designates the OTP/EPROM program memory variant (vs. 'F' for Flash and 'HV' for high-voltage variants), making it one-time field-programmable using a device programmer such as the MPLAB PM3. Key features of the PIC16C57-10/P include a 12-bit wide instruction set with 8-bit data path, two-level deep hardware stack, direct/indirect/relative addressing modes, and a single 8-bit real-time counter/timer (TMR0). It supports seven or eight special-function hardware registers (SFRs) depending on configuration, and provides a watchdog timer for reliable standalone operation. The CMOS process delivers low quiescent current suitable for battery-powered or always-on applications. The PIC16C57-10 architecture is a classic Harvard design with separate program and data buses, enabling simultaneous instruction fetch and data access. The RISC core executes most instructions in a single cycle, delivering approximately 5 MIPS at 10MHz - an order of magnitude above contemporaries in the same price class. The 2:1 code compression relative to other 8-bit MCUs reduces program memory pressure for the 3KB EPROM. Typical applications include industrial control logic, appliance controllers, simple sensor interfaces, automotive body electronics (non-safety), low-end consumer devices, and legacy embedded systems. Designers often choose the PIC16C57-10/P for cost-sensitive applications where the OTP memory model is acceptable and the 20 I/O count fits the system needs. When designing with this device, note that OTP memory cannot be reprogrammed in-circuit - a programmed device cannot be erased, only replaced. For prototype or iterative-development workflows, a Flash variant (PIC16F57) is recommended. Always include decoupling capacitors within 5mm of VDD/VSS pins. This page synthesizes distributor pricing, drop-in alternative analysis, and practical design notes not found in the manufacturer datasheet, with cross-references to same-family and cross-brand equivalents.

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PIC16C57-10/SS

PIC16C57-10/SS - 10MHz 8-bit OTP MCU, 3KB | Microchip

The Microchip PIC16C57-10/SS is an 8-bit, fully static, EPROM/ROM-based CMOS microcontroller from the PIC® 16C family, packaged in a 28-pin SSOP (5.30 mm body width) and rated for 10 MHz maximum clock frequency. According to the Microchip PIC16C57 datasheet, the device integrates 3 KB (2K x 12) of OTP program memory, 72 bytes of data RAM, 20 digital I/O pins, and a two-level deep hardware stack, with a 12-bit wide instruction word and 8-bit data path that yields a typical 2:1 code compression over comparable 8-bit MCUs. A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory, data RAM, and peripherals such as timers, I/O ports, and interrupt logic. Within the broader hierarchy, the PIC16C57 belongs to the 8-bit MCU category -> microcontroller -> embedded processor -> semiconductor IC. The "PIC16C" prefix identifies Microchip's mid-range, OTP/EPROM-programmable family using a RISC Harvard architecture that executes one instruction per internal clock cycle (except branches), giving deterministic timing suitable for cost-sensitive real-time control. Key features of the PIC16C57-10/SS include a 10 MHz maximum oscillator frequency, an 8-bit real-time counter/timer (TMR0) with programmable prescaler, direct/indirect/relative addressing modes, seven or eight special function hardware registers, a watchdog timer, power-on reset, and a wide 2.5 V to 6.25 V (typical 5 V) operating voltage range. The CMOS process yields very low power consumption, enabling battery-backed designs. Commercial temperature grade (0 °C to +70 °C) is standard for the /SS SSOP variant. Architecturally, the PIC16C57 uses a 12-bit instruction word fetched from program memory while the 8-bit data path reads/writes the file register map. The 2-level hardware stack supports subroutine nesting without software stack management. I/O ports are bidirectional with programmable weak pull-ups, and the device operates fully statically so the clock can be stopped without losing state - useful for low-power standby. Typical applications include appliance controls, sensor interface boards, simple motor drivers, hobby and educational platforms, automotive body electronics (non-safety), security keypads, and remote-control transmitters. The OTP memory is well suited to fixed-code production runs of moderate volume where in-field reprogramming is not required. A practical design note: the PIC16C57's 10 MHz oscillator limit must be respected when using HS or XT crystal modes; for lower-frequency designs (e.g., 32 kHz timing), the LP mode reduces supply current. Brown-out and watchdog behaviour should be configured in the configuration word prior to programming the OTP array, as these fuses cannot be changed after code commit. This page synthesizes distributor pricing, drop-in alternative listings, and practical design notes that supplement the manufacturer datasheet, helping engineers quickly select and source PIC16C57-10/SS in production.

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PIC16C57-10E/SO

PIC16C57-10E/SO - 8-Bit 10MHz OTP MCU 3KB | Microchip

The Microchip Technology PIC16C57-10E/SO is a member of the PIC16C5X family of 8-bit CMOS microcontrollers, featuring a 10 MHz maximum clock, 3 KB (2K x 12) of One-Time Programmable (OTP) program memory, 72 bytes of data RAM, and 20 digital I/O pins, all housed in a 28-pin SOIC (7.50 mm / 0.295" width) surface-mount package with an industrial-grade -40 C to +125 C operating temperature range and a 4.5 V to 5.5 V supply. The "E" suffix indicates the extended industrial temperature grade and the "10" denotes the 10 MHz oscillator frequency rating; the "/SO" suffix specifies the wide-body 28-SOIC package. A PIC16C5X microcontroller is a classic 8-bit Reduced Instruction Set Computer (RISC) device based on a Harvard architecture. Unlike von Neumann machines, the PIC family uses physically separate program and data buses, allowing simultaneous instruction fetch and data access for predictable single-cycle execution. The 12-bit-wide instruction word is highly symmetrical, producing a 2:1 code compression ratio compared to competing 8-bit microcontrollers in its price and performance class. The PIC16C5X occupies the role of low-cost baseline microcontroller within the broader PIC16 family hierarchy, sitting below the PIC16C55/56 (smaller memory) and being superseded by PIC16F57 (Flash-based) and later PIC16F1xxx families. Key features include 33 single-word instructions, 2-level hardware stack, 8-bit timer/counter (TMR0) with 8-bit programmable prescaler, watchdog timer with on-chip RC oscillator, programmable code protection, power-on reset, and brown-out detection via power-up timer. The PIC16C57 specifically includes 20 I/O pins with high-current sink/source capability (25 mA per pin, 100 mA total), making it suitable for direct LED drive and small-signal switching. Four oscillator options are supported: RC, LP (low-power crystal), XT (standard crystal), and HS (high-speed crystal), enabling system-level power optimization. Architecturally, the device uses a two-stage pipeline (fetch + execute) and a 12-bit program counter that can address 2K words directly, yielding the 3 KB program-memory figure quoted as 2K x 12. The Harvard bus topology eliminates data-memory contention with program fetches, which is why PIC cores can claim single-cycle instruction throughput despite modest clock rates. The CMOS EPROM-based process used for the "C" family allows one-time programmable operation - the part cannot be electrically erased - so it is intended for volume production where firmware is finalized. The 28-SOIC package uses industry-standard JEDEC MS-013 pinout, allowing drop-in compatibility with 28-pin Flash-based PIC16F57 and the larger-memory PIC16C58 family in the same footprint. Typical applications include consumer-electronics remote controls, small appliance controllers, automotive body modules (with extended temperature grade), industrial sensor interfaces, battery chargers, low-cost LED lighting controllers, and educational/embedded-training platforms. The 20 high-current I/O pins allow direct relay or transistor-base drive without external driver ICs. The 10 MHz instruction rate (~5 MIPS peak) is more than sufficient for slow human-interface and control loops. When designing with this part, allocate a 0.1 uF decoupling capacitor adjacent to each VDD/VDDX pin pair, keep the crystal (if used) within 1 cm of the OSC1/OSC2 pins, and add a 1 M ohm parallel bleeder if using the watchdog WDT to suppress spurious resets on slow VDD ramps. The OTP memory limits in-field firmware updates, so production programming must be the final step.

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PIC16C57-10E/SP

PIC16C57-10E/SP - 8-Bit 10MHz OTP MCU 3KB | Microchip

The Microchip Technology PIC16C57-10E/SP is an 8-bit RISC microcontroller belonging to the PIC16C5X family, featuring 3KB (2K x 12) of One-Time Programmable (OTP) program memory and 72 bytes of RAM, housed in a 28-pin SPDIP (Skinny Plastic Dual-In-Line Package) through-hole package. It operates at a maximum clock frequency of 10 MHz and is rated for an extended industrial temperature range of -40C to +125C, as indicated by the 'E' designator in the part number. An 8-bit microcontroller (MCU) is a small computer on a single integrated circuit containing a CPU, program memory, data RAM, and peripheral interfaces. Microcontrollers sit at the bottom of the embedded-computing hierarchy (microcontroller -> embedded processor -> microprocessor), and the PIC16C5X architecture is a classic Harvard-type design with separate program and data paths, optimized for low cost, deterministic instruction execution, and small code size through 12-bit-wide opcodes that deliver roughly 2:1 code compression over competing 8-bit MCUs in its class. Key features of the PIC16C57-10E/SP include 20 general-purpose digital I/O pins, a 12-bit instruction word, 2-level hardware stack, single 8-bit timer (Timer0), watchdog timer with on-chip RC oscillator, power-on reset, and brown-out detection. The OTP EPROM program memory allows one-time programming in production environments, which is well suited to mature, cost-sensitive embedded products that no longer require field firmware updates. The PIC16C57-10E/SP uses Microchip's classic PIC mid-range core architecture, executes most instructions in a single 200 ns cycle at 10 MHz (5 MIPS), and supports in-circuit serial programming through the RB6/RB7 pins. Because the device is OTP and based on a 5V CMOS process, it is best matched to 5V-only logic designs; modern 3.3V systems will require level translation. Typical applications include appliance controls, simple sensor interface nodes, LED driving controllers, low-cost consumer electronics, and legacy industrial automation subsystems. The extended-temperature grade also supports automotive under-hood and outdoor industrial deployments. The 28-pin SPDIP package is convenient for breadboarding and legacy board retrofits where through-hole assembly is required. When designing with this device, note that OTP memory cannot be reprogrammed; developers typically use a windowed (JW) or UV-erasable variant for prototyping, then transition to the OTP SPDIP or SOIC version for production. A pull-up on the MCLR reset pin and proper decoupling (100 nF + 10 uF bulk) on VDD are essential for stable brown-out-reset behavior.

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PIC16C57-10E/SS

PIC16C57-10E/SS - 8-bit OTP MCU 2Kx12 10MHz SSOP-28 | Microchip

The Microchip Technology PIC16C57-10E/SS is an 8-bit CMOS EPROM-based microcontroller from the PIC16C5x family, delivering up to 10 MHz operation in a 28-pin SSOP (Shrink Small Outline Package). It integrates 2K x 12 (3KB) words of one-time-programmable (OTP) program memory and 72 bytes of general-purpose data RAM, making it suitable for cost-sensitive embedded control applications. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, memory, and I/O peripherals. The PIC16C5x family uses a RISC architecture with only 33 single-word/12-bit instructions, achieving 2:1 code compression over other 8-bit microcontrollers in its class. PIC microcontrollers belong to the broader category of microcontrollers -> embedded processors -> semiconductors, and have been a dominant architecture for low-power and deterministic control since the 1990s. Key features of the PIC16C57-10E/SS include a 10 MHz maximum clock frequency, 20 I/O pins, two 8-bit timers/counters, a watchdog timer, and a power-on reset circuit. The 'E' suffix denotes the extended industrial temperature range (-40C to +125C), and the 'SS' suffix designates the 28-lead SSOP package. The device operates from a single 2.5V to 5.5V supply, drawing low quiescent current suitable for battery-powered and energy-conscious designs. The PIC16C57-10E/SS uses a Harvard architecture with separate program and data buses, enabling simultaneous instruction fetch and data access. Its OTP EPROM program memory allows prototype and small-volume production programming using devices such as the MPLAB PM3. The architecture delivers deterministic interrupt response and predictable instruction timing, which is critical for real-time control loops. Typical applications include consumer appliance control, automotive body electronics, industrial sensor interfaces, security and alarm systems, and low-cost remote-control transmitters. The wide operating voltage range and small SSOP footprint also suit handheld instrumentation and IoT edge nodes where board space is at a premium. When designing with this device, note that OTP memory cannot be electrically erased - firmware must be fully validated before programming. For engineering development, a windowed ceramic package variant (PIC16C57-10E/JW) or a Flash-based PIC16F57 should be used to allow iterative code changes. This page synthesizes distributor inventory, parametric comparisons, and design considerations for engineers evaluating the PIC16C57-10E/SS as a drop-in 8-bit MCU solution.

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PIC16C57-10I/P

PIC16C57-10I/P - 8-Bit CMOS MCU 2KB EPROM 28-PDIP | Microchip

The Microchip Technology PIC16C57-10I/P is an 8-bit CMOS RISC microcontroller with 2KB of one-time-programmable (OTP) EPROM program memory and 72 bytes of RAM, housed in a 28-pin PDIP (Plastic DIP) through-hole package. It belongs to Microchip's foundational PIC16C5X family and operates at a 10 MHz oscillator frequency with a 4.0 us instruction cycle. The device supports 20 digital I/O pins across two ports (RA and RB) and is specified for the industrial -40C to +85C temperature range, indicated by the "I" suffix. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, data memory, and peripheral interfaces on a single die. The PIC16C5X family uses a 12-bit-wide instruction word and an 8-bit data path with a two-level deep hardware stack. It sits within the broader taxonomy of: microcontroller -> embedded processor -> semiconductor device. The "C" suffix denotes CMOS EPROM-based program memory, distinguishing it from the flash-based PIC16F5X successors, and the OTP nature means each device can be programmed exactly once and cannot be erased. Key features of the PIC16C57 include a RISC instruction set with only 33 single-word/single-cycle instructions, a 2:1 code compression advantage over competing 8-bit MCUs in its class, and seven or eight special function hardware registers. The integrated 8-bit Timer0 (TMR0) with an 8-bit prescaler handles timing and counting tasks, while the device supports direct, indirect, and relative addressing modes for both data and instructions. The PIC16C57's power-on reset, power-saving SLEEP mode, and wide operating voltage range (2.5V-6.0V typical) make it well suited for cost-sensitive embedded control. Architecturally, the PIC16C57 employs a Harvard-style separate program and data bus arrangement, enabling simultaneous instruction fetch and operand access. The OTP EPROM is programmed via standard Microchip device programmers (such as the MPLAB PM3), and the wide operating voltage tolerance (3.3V and 5V rails) allows deployment in both 5V legacy systems and modern 3.3V designs. Compared to PIC16F5X flash replacements, the PIC16C57-10I/P offers equivalent instruction set compatibility but lacks in-system reprogrammability. Typical applications include consumer appliances, automotive body electronics, industrial control subsystems, security and access control panels, and low-end remote sensor nodes. The wide temperature range and robust 5V tolerance also suit HVAC controls and uninterruptible power supply (UPS) auxiliary monitoring boards. The through-hole PDIP package simplifies prototyping and field-serviceable designs. When designing with this part, note that the PIC16C57 uses an OTP EPROM and cannot be reprogrammed; consider the flash-based PIC16F57 for development cycles requiring multiple firmware revisions. Also verify the 20 I/O pin count matches the target PCB footprint - the 28-pin PDIP shares the same outline across the PIC16C55/56/57 family but with different pin assignments. This page synthesizes distributor pricing, drop-in alternatives within the PIC16C5X family, and practical design notes not consolidated in the original Microchip datasheet.

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PIC16C57-10I/SO

PIC16C57-10I/SO - 8-Bit 10MHz OTP MCU 3KB | Microchip

The Microchip Technology PIC16C57-10I/SO is an 8-bit CMOS microcontroller from the PIC16C5X family, delivering 10 MIPS performance at 10 MHz clock with 3 KB (2K x 12) of One-Time-Programmable (OTP) program memory and 72 bytes of RAM, housed in a 28-pin SOIC (0.295", 7.50 mm width) package. The industrial-grade "-I" suffix denotes an operating temperature range of -40 °C to +85 °C, making the part suitable for harsh-environment embedded designs. An 8-bit microcontroller (MCU) is a small computer-on-a-chip integrating an 8-bit CPU core, program memory (ROM/EPROM/Flash/OTP), data RAM, and peripherals such as timers, I/O ports, and interrupts. Within the broader taxonomy, the PIC16C57 belongs to the 8-bit MCU -> microcontroller -> embedded processor -> semiconductor device family. The "C" suffix indicates CMOS EPROM-based program memory, while the "OTP" variant allows a single user programming cycle, ideal for low-to-medium volume production runs where mask-ROM NRE costs are uneconomical. Key features include 20 digital I/O pins organized across ports RA-RC, a single 8-bit Timer0 (TMR0) with programmable prescaler, a two-level deep hardware stack, and Harvard architecture with 12-bit wide instructions and 8-bit data path. The PIC16C57 supports 33 single-word instructions, DC to 10 MHz operation, and offers 4 oscillator modes (RC, LP, XT, HS) for design flexibility across low-power and high-speed clocking. Watchdog timer and power-on reset enhance field reliability, and the 8-bit real-time clock/counter supports event timing without software overhead. Typical applications include appliance control, automotive body electronics, industrial sensor interfaces, low-end consumer products, smart sensors, LED lighting controllers, and battery-powered embedded systems. The wide operating voltage (typically 2.5 V to 6.0 V) and low power consumption suit both line-powered and battery-backed designs. When designing with the PIC16C57, note that the OTP memory cannot be re-programmed, so production code must be validated on EPROM-windowed (JW) samples first. The 2-level hardware stack limits subroutine nesting to two levels - C compilers and high-level languages are not supported, and the developer must write in PIC assembly or use a state-machine coding style.

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PIC16C57-10I/SP

PIC16C57-10I/SP - 8-Bit 10MHz 3KB OTP MCU 28-SPDIP | Microchip

The Microchip Technology PIC16C57-10I/SP is a member of the PIC16C5X family of low-cost, high-performance 8-bit fully-static EPROM-based CMOS microcontrollers. Operating at up to 10 MHz, the device integrates 3 KB of OTP program memory (2K x 12 organization), 72 bytes of RAM, and 20 digital I/O pins in a 28-pin SPDIP (Skinny Plastic DIP) through-hole package. The "/SP" suffix denotes the SPDIP package, "-10" indicates the 10 MHz speed grade, and "I" indicates the industrial operating temperature range of -40 °C to +85 °C. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, working RAM, and peripheral I/O on one die. In the broader component taxonomy, the PIC16C57 sits below general-purpose microprocessors and above fixed-function logic ICs: it belongs to the 8-bit microcontroller class, within the PIC family, under the Integrated Circuits umbrella. 8-bit MCUs like the PIC16C57 dominate cost-sensitive, deterministic, low-power embedded applications where pin count, code density, and predictable interrupt latency outweigh raw throughput. Key features include a 12-bit wide instruction word with 8-bit data path, two-level deep hardware stack, direct/indirect/relative addressing modes, 8-bit real-time clock/counter (TMR0), and a programmable Watchdog Timer with on-chip RC oscillator. The PIC16C5X RISC architecture delivers 2:1 code compression versus typical 8-bit CISC MCUs of its class, enabling small-footprint firmware. Power consumption is characterized by < 2 mA typical operating current at 5 V and 10 MHz, with a < 1 µA standby current in Sleep mode. The device supports an oscillator frequency range of DC to 10 MHz and operates from 3.0 V to 6.0 V. Typical applications include industrial control systems, appliance controls, automotive subsystems (non-safety-critical), security and alarm panels, simple sensor interfaces, consumer electronics, and low-cost replacement of discrete logic. The wide 20-I/O count and small SPDIP footprint make it well suited to retrofits and legacy through-hole PCB designs where surface-mount conversion is impractical. When designing with the PIC16C57-10I/SP, ensure VDD decoupling with 0.1 µF ceramic capacitors close to the power pin, choose an oscillator topology (RC, XT, LP, or HS) matched to the application frequency, and allocate sufficient OTP programming margin. Note that OTP memory cannot be erased or rewritten; for in-circuit firmware iteration, the PIC16F57 flash variant is preferred.

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PIC16C57-HS/P

PIC16C57-HS/P - 8-bit OTP MCU 20MHz 3KB | Microchip

The Microchip Technology PIC16C57-HS/P is an 8-bit CMOS RISC microcontroller from the PIC16C5X baseline family, featuring 20MHz maximum clock speed, 2K x 12 (3KB) of one-time programmable (OTP) program memory, and 72 bytes of data RAM in a 28-pin PDIP through-hole package. The 'HS' suffix denotes a high-speed oscillator variant supporting crystals up to 20MHz, while the '/P' package code indicates a 28-pin PDIP (Plastic Dual In-line Package) for prototyping and industrial through-hole designs. An OTP microcontroller is a variant of programmable microcontroller in which the program memory can be written once via a device programmer and is then non-volatile and non-erasable. The PIC16C57 belongs to the baseline PIC16 family hierarchy, which sits under the broader PICmicro 8-bit microcontroller taxonomy and ultimately under Microchip's PIC microcontroller portfolio. OTP parts sit alongside EPROM windowed, Flash, and ROM-based variants in the same silicon family, with OTP favored for cost-sensitive, high-volume production where field re-programmability is not required. Key features of the PIC16C57-HS/P include a 12-bit wide instruction word with 33 single-word/single-cycle instructions, a two-level deep hardware stack, eight-level deep hardware call stack, direct/indirect/relative addressing modes, a single 8-bit real-time clock/counter (TMR0) with 8-bit programmable prescaler, 20 digital I/O pins capable of sourcing/sinking up to 25mA per pin, watchdog timer with on-chip RC oscillator, power-on reset, power-saving SLEEP mode, and code-protect security fuse. Operating voltage is 3.0V to 5.5V with commercial and industrial temperature grades available. The architecture uses a Harvard-style RISC design with separate program and data buses, two 8-bit file-select registers (FSR) for indirect addressing, and seven or eight special function hardware registers mapped into a common I/O space. Throughput is approximately 5 million instructions per second at 20MHz, giving cycle times of 200ns - roughly 2:1 code compression over comparable 8-bit CISC microcontrollers in its class. Typical applications include consumer appliance controls, simple sensor interfaces, automotive body electronics (non-safety), battery chargers, low-end motor control loops, security keypads, and replacement of discrete logic in glue-logic consolidation designs. The 28-pin PDIP package remains popular for through-hole prototyping, educational platforms, and legacy industrial equipment where socketed replacement is required. When designing with this part, ensure the OTP programming step is integrated into the manufacturing flow because field firmware updates are impossible after programming. For designs requiring in-system reprogrammability, consider migrating to the pin-compatible PIC16F57 flash variant. This page synthesizes distributor pricing, drop-in alternatives within the same 28-pin PDIP footprint, and practical design notes not collected in any single manufacturer datasheet.

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PIC16C57-HS/SO

PIC16C57-HS/SO - 20MHz 8-bit OTP MCU, 3KB, 28-SOIC | Microchip

The Microchip PIC16C57-HS/SO is an 8-bit fully-static EPROM/OTP-based CMOS microcontroller from the PIC16C5X family, operating up to 20 MHz with a 2K x 12 (3 KB) one-time-programmable program memory and 72 bytes of RAM in a 28-pin SOIC (SO) wide-body package. Its HS (High-Speed) oscillator suffix designates the use of an external crystal/oscillator in the DC–20 MHz range, distinguishing it from the RC, LP (low-power), and XT (standard) variants in the same family. The device integrates 20 general-purpose digital I/O lines, an 8-bit real-time clock/counter (TMR0) with an 8-bit prescaler, a two-level deep hardware stack, and direct/indirect/relative addressing for both data and instructions. A microcontroller (MCU) is a single-chip computer that integrates a CPU, RAM, non-volatile program memory (here, OTP EPROM), and peripherals such as timers and I/O ports. The PIC16C5X family sits at the entry-level of Microchip's 8-bit PIC architecture, optimized for cost-sensitive, deterministic, bit-manipulation-heavy embedded tasks where RISC-like instruction execution and low pin count matter more than raw throughput. Key differentiating features include 12-bit-wide instructions on an 8-bit data path for compact code density, seven or eight special-function hardware registers, a watchdog timer option, and a Power-on Reset (POR) circuit. The wide 7.5 mm body SOIC (SO) package supports surface-mount manufacturing while maintaining drop-in compatibility with the 28-pin PDIP footprint on adapter boards. Compared with the PIC16F57-I/SO Flash successor, the PIC16C57-HS/SO offers OTP rather than in-circuit reprogrammability, which lowers per-unit cost for mature, finalized firmware. Typical applications include appliance control boards, simple sensor-conditioning front-ends, LED display drivers, automotive body controllers, and hobby robotics. The wide operating voltage range (typically 3.0 V to 5.5 V) and low standby current make it suitable for battery-backed subsystems. Designers should reserve the OTP window only for fully validated firmware, since OTP parts cannot be rewritten; production programming must use a Microchip-supported device programmer such as MPLAB PM3.

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PIC16C57-HS/SP

PIC16C57-HS/SP - 8-bit 20MHz OTP MCU, 3KB | Microchip

The Microchip Technology PIC16C57-HS/SP is an 8-bit CMOS RISC microcontroller in a 28-pin SPDIP (Skinny Plastic DIP) package, operating at 20 MHz with 3 KB (2K x 12) of One-Time Programmable (OTP) program memory and 72 bytes of RAM. It is part of Microchip's legacy PIC16C5x family, delivering high performance in its price class through a 12-bit wide instruction word that yields 2:1 code compression over competing 8-bit MCUs. A microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, data RAM, and I/O peripherals. Within the broader taxonomy, PIC16C5x parts are classified as 8-bit microcontrollers -> RISC microcontrollers -> embedded controllers -> semiconductors. The PIC16C5x line uses a Harvard architecture with separate program and data buses, a two-level deep hardware stack, and direct/indirect/relative addressing modes. OTP memory is one-time programmable (cannot be erased), which is ideal for high-volume mature products and is more cost-effective than UV-erasable EPROM or Flash. Key specifications include: 20 MHz maximum clock (HS oscillator mode, hence the -HS suffix), 33 single-word instructions, 8-bit ALU, 20 source/sink I/O pins, one 8-bit real-time clock/counter (TMR0), and a watchdog timer. The wide operating voltage range of 2.5 V to 6.25 V and commercial temperature grade (0 C to +70 C) make it suitable for cost-sensitive embedded control applications. Power consumption is low at approximately 2 mA typical at 5 V / 20 MHz. Architecturally, the PIC16C5x uses a RISC instruction set with a fixed 12-bit instruction width and an 8-bit data path. All instructions execute in a single cycle except branches, which take two cycles. Two special function hardware registers (OPTION and TRIS) configure the I/O direction and prescaler, and seven or eight additional special function registers handle peripheral control and arithmetic. The device does not include interrupts, which is a defining characteristic of the PIC16C5x baseline family. Typical applications include appliance controls, simple sensor interfaces, LED driving controllers, low-cost consumer electronics, and industrial timers/counters. The PIC16C57 is also widely used as a one-time-programmable replacement for legacy 8-bit designs where board space and BOM cost are critical and Flash reprogrammability is not required. When designing with the PIC16C57-HS/SP, choose the HS oscillator mode carefully: it supports high-speed crystals/resonators up to 20 MHz but draws more current than the LP (low-power) or RC modes. Since OTP memory cannot be erased, consider emulating the design on a PIC16F5x Flash equivalent (e.g., PIC16F57) for development, then migrating to PIC16C57-HS/SP for production to minimize unit cost. This page synthesizes verified distributor pricing, drop-in same-package alternatives, parametric comparisons, and practical design notes - engineering data not consolidated on the manufacturer datasheet alone.

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PIC16C57-HS/SS

PIC16C57-HS/SS - 8-Bit 20MHz OTP MCU 2KB EPROM | Microchip

The Microchip Technology PIC16C57-HS/SS is an 8-bit RISC EPROM/ROM-based CMOS microcontroller in the PIC16C5X family, supplied in a 28-pin SSOP package. It provides 2KB of EPROM program memory (organized as 2K x 12), 72 bytes of RAM, and operates from a single 5V supply with a maximum clock rate of 20 MHz (HS oscillator grade). An 8-bit microcontroller (MCU) is a small, single-chip computer built around an 8-bit data path, a CPU, program memory, data RAM, and a fixed set of peripheral registers. The PIC16C5X architecture uses 12-bit-wide instructions and an 8-bit-wide data path, achieving roughly 2:1 code compression compared with other 8-bit MCUs in its class, and executes most instructions in a single 200 ns instruction cycle at 20 MHz. This combination of small footprint, deterministic execution, and low cost established the PIC16C5X family as the de-facto baseline for simple embedded control in the 1990s and is still emulated today in retro-arcade and industrial designs. Key features of the PIC16C57-HS/SS include 12 I/O pins across two ports (RA0-RA3, RB0-RB7), an 8-bit real-time clock/counter (TMR0) with an 8-bit programmable prescaler, a watchdog timer, a two-level deep hardware stack, and direct/indirect/relative addressing modes for both data and instructions. Seven or eight special-function hardware registers handle all peripheral control, keeping the core die size minimal. The HS grade specifies a high-speed external crystal/ceramic resonator oscillator mode supporting up 20 MHz operation. Architecturally, the PIC16C57-HS/SS uses a fully static CMOS RISC core, meaning clock frequency can be reduced arbitrarily for power savings without losing state. The Harvard memory architecture separates program (12-bit wide EPROM) and data (8-bit wide RAM) buses, eliminating the von Neumann fetch bottleneck. On-chip EPROM allows one-time-programmable (OTP) code storage, ideal for low-to-medium volume production where mask-ROM NRE is not amortized. Typical applications include legacy industrial control, security/alarm panels, appliance controllers, automotive body electronics, simple sensor interfaces, arcade and pinball board replacement (the PIC16C57 is widely emulated in MAME), and consumer IR remote transmitters. The 28-SSOP package is suitable for hand-solder prototyping and reflow production alike. A key design consideration is that the PIC16C57 family uses a 12-bit instruction word and lacks in-circuit serial programming (ICSP) on most packages; engineering samples or production units must be programmed externally with a device programmer such as the MPLAB PM3. Designers transitioning newer code should evaluate the pin-compatible PIC16F57 (Flash-based, ICSP-capable) as a same-footprint migration path. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes that complement, rather than duplicate, the official Microchip datasheet.

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PIC16C56T-HSI/SO - 8-bit OTP MCU 1.75KB EPROM 12 I/O | Microchip

PIC16C56T-HSI/SS - 8-Bit 20MHz OTP MCU 1.5KB | Microchip

PIC16C56T-LP/SO - 8-bit OTP MCU, 40MHz, 1.5KB EPROM, SOIC-18

PIC16C56T-LP/SS - 8-Bit 40MHz OTP MCU 1.5KB | Microchip

PIC16C56T-LPE/SS - 8-Bit 40MHz OTP MCU 1.5KB | Microchip

PIC16C56T-LPI/SO - 8-Bit OTP MCU 1.5KB | Microchip

PIC16C56T-RC/SS - 8-Bit 4MHz OTP MCU, 20-SSOP | Microchip

PIC16C56T-RCE/SO - 8-bit 4MHz 1.5KB OTP MCU 18-SOIC | Microchip

PIC16C56T-RCE/SS - 8-Bit 4MHz OTP MCU 1.5KB | Microchip

PIC16C56T-RCI/SO - 8-Bit 4MHz OTP MCU 1.5KB | Microchip

PIC16C56T-XT/SS - 8-Bit OTP MCU, 4MHz, 1.5KB | Microchip

PIC16C56T-XTI/SO - 8-Bit 4MHz OTP MCU 1.5KB | Microchip

PIC16C57-10/P - 8-Bit OTP MCU 3KB EPROM 20 I/O | Microchip

PIC16C57-10/SS - 10MHz 8-bit OTP MCU, 3KB | Microchip

PIC16C57-10E/SO - 8-Bit 10MHz OTP MCU 3KB | Microchip

PIC16C57-10E/SP - 8-Bit 10MHz OTP MCU 3KB | Microchip

PIC16C57-10E/SS - 8-bit OTP MCU 2Kx12 10MHz SSOP-28 | Microchip

PIC16C57-10I/P - 8-Bit CMOS MCU 2KB EPROM 28-PDIP | Microchip

PIC16C57-10I/SO - 8-Bit 10MHz OTP MCU 3KB | Microchip

PIC16C57-10I/SP - 8-Bit 10MHz 3KB OTP MCU 28-SPDIP | Microchip

PIC16C57-HS/P - 8-bit OTP MCU 20MHz 3KB | Microchip

PIC16C57-HS/SO - 20MHz 8-bit OTP MCU, 3KB, 28-SOIC | Microchip

PIC16C57-HS/SP - 8-bit 20MHz OTP MCU, 3KB | Microchip

PIC16C57-HS/SS - 8-Bit 20MHz OTP MCU 2KB EPROM | Microchip