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PIC16C56T-RCI/SO - 8-Bit 4MHz OTP MCU 1.5KB | Microchip
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 - 8-Bit OTP MCU, 4MHz, 1.5KB | Microchip
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 - 8-Bit 4MHz OTP MCU 1.5KB | Microchip
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 - 8-Bit OTP MCU 3KB EPROM 20 I/O | Microchip
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 - 10MHz 8-bit OTP MCU, 3KB | Microchip
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 - 8-Bit 10MHz OTP MCU 3KB | Microchip
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 - 8-Bit 10MHz OTP MCU 3KB | Microchip
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 - 8-bit OTP MCU 2Kx12 10MHz SSOP-28 | Microchip
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 - 8-Bit CMOS MCU 2KB EPROM 28-PDIP | Microchip
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 - 8-Bit 10MHz OTP MCU 3KB | Microchip
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 - 8-Bit 10MHz 3KB OTP MCU 28-SPDIP | Microchip
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 - 8-bit OTP MCU 20MHz 3KB | Microchip
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 - 20MHz 8-bit OTP MCU, 3KB, 28-SOIC | Microchip
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 - 8-bit 20MHz OTP MCU, 3KB | Microchip
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 - 8-Bit 20MHz OTP MCU 2KB EPROM | Microchip
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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PIC16C57-HSE/P - 8-bit OTP MCU, 3KB EPROM, 20 I/O, 28-PDIP | Microchip
PIC16C57-HSE/P

PIC16C57-HSE/P - 8-bit OTP MCU, 3KB EPROM, 20 I/O, 28-PDIP | Microchip

The Microchip Technology PIC16C57-HSE/P is an 8-bit RISC microcontroller from the PIC16C5X baseline family, featuring 3KB of one-time-programmable (OTP) EPROM program memory, 72 bytes of RAM, and 20 digital I/O pins in a 28-pin PDIP through-hole package. The "HSE" speed suffix denotes a high-speed oscillator variant operating up to 20 MHz with a 200 ns instruction cycle, and the "/P" suffix indicates the plastic DIP package supplied in tube packaging. This device runs from a 3.0V to 6.0V supply and is specified for the commercial 0C to +70C temperature range. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, non-volatile program memory, working RAM, and configurable I/O peripherals onto one silicon die. The PIC16C5X family sits at the low-cost, low-pin-count end of Microchip's PIC baseline architecture and is widely used in cost-sensitive embedded applications. Within the broader taxonomy, PIC microcontrollers belong to the RISC microcontroller category, which contrasts with CISC architectures by using a small, fixed-length instruction set that executes most instructions in a single cycle. The 12-bit-wide instruction set enables 2:1 code compression over typical 8-bit CISC MCUs, allowing more functionality in less program memory. Key features of the PIC16C57-HSE/P include a 33-instruction set, a two-level hardware stack, 8-bit timer/counter with 8-bit prescaler, watchdog timer with on-chip RC oscillator for reliable operation, power-on reset, and brown-out detection. The 20 I/O pins can be individually configured for input or output and can source/sink up to 20 mA per pin, making them capable of directly driving LEDs and small relays. The high-speed 20 MHz operation delivers 5 MIPS of throughput, suitable for simple control loops and user-interface scanning tasks. Architecturally, the PIC16C57-HSE/P uses a Harvard architecture with separate program and data buses, allowing simultaneous instruction fetch and operand access. The EPROM-based program memory enables prototyping and low-volume production, but cannot be electrically erased, so OTP programming is final. In-circuit serial programming (ICSP) is supported via RB6/RB7 pins, simplifying firmware loading on the production line. Typical applications include simple consumer appliances, remote controls, low-end toys, small appliances with keypad/LED user interfaces, sensor interface nodes, and legacy industrial controllers. The 20 I/O count and 3KB program memory comfortably handle a 4x4 keypad matrix scan, 7-segment LED multiplexing, and basic PID control loops. When designing with this device, plan the OTP programming process early: once programmed, OTP cannot be erased, so firmware bugs in production parts cannot be recovered. Use a windowed PIC16C57-JW variant for engineering development so the same die can be UV-erased and re-programmed during code iteration.

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PIC16C57-HSE/SO - 8-Bit 16MHz 3KB OTP MCU 28-SOIC | Microchip
PIC16C57-HSE/SO

PIC16C57-HSE/SO - 8-Bit 16MHz 3KB OTP MCU 28-SOIC | Microchip

The Microchip Technology PIC16C57-HSE/SO is an 8-bit RISC microcontroller from the PIC16C5X family, featuring a 16 MHz maximum clock speed, 3 KB of One-Time-Programmable (OTP) program memory organized as 2K x 12 words, and 72 bytes of data RAM, all housed in a 28-pin Small Outline Integrated Circuit (SOIC) package. A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory, and peripherals. An 8-bit MCU like the PIC16C57 processes data 8 bits at a time and is widely used in cost-sensitive embedded applications where deterministic performance and low power are more critical than raw throughput. Within the broader semiconductor hierarchy, an MCU is a sub-category of microcontrollers, which sit under integrated circuits (ICs) and the wider power management and digital logic taxonomy. PIC16C5X devices use a Harvard architecture with separate program and data buses, enabling single-cycle instruction execution except for program branches. Key features of the PIC16C57-HSE/SO include a Harvard RISC architecture with 33 single-word instructions, a 12-bit wide instruction set providing 2:1 code compression over competing 8-bit MCUs, 20 I/O pins with individual direction control, a watchdog timer for reliable operation, and a power-on reset (POR) circuit. The device operates from a 4.5V to 5.5V supply and includes a high-speed 16 MHz external oscillator mode (the "HSE" suffix designates this 16 MHz high-speed crystal/oscillator variant). It supports operating temperatures typical of automotive and industrial grade environments. The PIC16C57's EPROM/OTP program memory architecture allows one-time programming for low-to-mid volume production, and the 16 MHz clock gives an instruction cycle of 250 ns (4 clock periods per instruction cycle). Power management features include a sleep mode that reduces quiescent current dramatically, plus a programmable code-protection scheme that prevents unauthorized memory reads. The 28-SOIC package is industry-standard and easy to hand-solder, making the part attractive for prototyping and small-batch builds. Typical applications include automotive body controllers, appliance control boards, simple sensor interfaces, low-end remote controls, LED driver controllers, and industrial timers. The PIC16C57 is also common in legacy industrial equipment and educational platforms because of its long product history and mature tool chain. When designing with the PIC16C57-HSE/SO, engineers should plan for OTP programming only once per device; for development, use a windowed (JW) package or the pin-compatible PIC16C57C flash variants. Because OTP memory cannot be erased, allocate spare program memory for late-stage bug fixes. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, providing an engineering-focused view beyond what the datasheet or distributor catalog offers.

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PIC16C57-HSE/SP - 8-Bit 16MHz OTP MCU 3KB | Microchip
PIC16C57-HSE/SP

PIC16C57-HSE/SP - 8-Bit 16MHz OTP MCU 3KB | Microchip

The Microchip Technology PIC16C57-HSE/SP is an 8-bit EPROM/ROM-based CMOS microcontroller from the PIC16C5X family, operating at 16MHz with an external HS oscillator configuration and packaged in a 28-pin SPDIP (Skinny Plastic DIP) through-hole form factor. The HSE suffix denotes the high-speed external oscillator mode, the SP suffix denotes 28-pin SPDIP package, and the device is qualified to the automotive temperature grade. According to the Microchip product listing, the device integrates 3KB (2K x 12) of One-Time-Programmable (OTP) program memory and 72 bytes of RAM, with 20 general-purpose I/O pins split across two ports (RA and RB). An 8-bit PIC microcontroller (MCU) is a RISC-based single-chip computer that combines a CPU core, non-volatile program memory, working RAM, and programmable I/O peripherals on a single silicon die. PIC microcontrollers sit within the broader hierarchy of microcontroller -> embedded processor -> semiconductor IC. The PIC16C5X family specifically targets cost-sensitive, low-to-moderate-performance embedded applications where deterministic instruction execution, simple peripheral sets, and ROM/EPROM-based program storage provide the best price-to-performance ratio. The OTP variant allows one-time factory or in-circuit programming, which is typical for mature 8-bit designs with stable firmware. Key features include 33 single-word instructions, a 12-bit wide instruction word enabling 2:1 code compression over typical 8-bit CISC architectures, two 8-bit I/O ports, an 8-bit timer/counter (TMR0) with an 8-bit programmable prescaler, a Watchdog Timer (WDT) with on-chip RC oscillator for reliable recovery, and Power-On Reset (POR). The device supports an operating voltage range commonly cited as 3.0V to 6.25V across the PIC16C5X family, with low-power CMOS construction. Its 28-pin SPDIP package is through-hole, simplifying prototype and low-volume production assembly. Architecturally, the PIC16C57 uses a Harvard RISC core with separate program and data buses, a two-stage pipeline, and a single accumulator (W register) working model. The 16MHz maximum clock yields a 250ns instruction cycle, and the OTP memory is windowless, requiring UV erasure only for prototype parts (JW package). For production runs, OTP parts ship pre-programmed. The HSE oscillator mode allows use of high-frequency external crystals or oscillators, distinguishing it from HS (standard) and RC variants. Typical applications include automotive body controllers and appliance control, simple sensor signal conditioning, LED and relay driver sequencing, industrial timer/counter modules, low-cost consumer electronics, and legacy embedded control boards. The wide operating temperature range and OTP memory make it suitable for high-volume fixed-function products where firmware does not need field updates. When designing with this part, choose the HS oscillator mode for higher clock accuracy and select capacitors matched to the crystal load capacitance. Ensure unused I/O pins are configured as outputs to minimize power consumption and reduce noise susceptibility. For modern designs requiring in-field reprogrammability, consider migrating to the Flash-based PIC16F57 or PIC16F884 equivalents; the PIC16C57-HSE/SP is best suited for mature, frozen-firmware production runs. This page synthesizes real-time distributor pricing, pin-compatible same-family alternatives (PIC16C57-HSE/SO, PIC16C57-10I/P, PIC16C57-10E/SS), and practical design notes that go beyond the manufacturer datasheet.

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PIC16C57-HSE/SS - 8-Bit EPROM MCU, 3KB OTP, 20MHz, 28-SSOP
PIC16C57-HSE/SS

PIC16C57-HSE/SS - 8-Bit EPROM MCU, 3KB OTP, 20MHz, 28-SSOP

The Microchip Technology PIC16C57-HSE/SS is an 8-bit EPROM/ROM-based CMOS microcontroller with 3KB of one-time-programmable (OTP) program memory, packaged in a 28-pin SSOP (Shrink Small Outline Package). It operates from a 20 MHz external clock input (HSE = High-Speed External oscillator) and targets cost-sensitive embedded control applications requiring deterministic RISC execution. A microcontroller (MCU) is a single-chip computer containing a CPU, memory (ROM/RAM), and programmable I/O peripherals on one IC. Within the embedded electronics taxonomy, the PIC16C57 sits in the 8-bit MCU class -> RISC microcontroller -> embedded controller -> semiconductor. It is fully static, employs a RISC architecture with 33 single-word/single-cycle instructions, and offers 12-bit-wide instruction words with a 4-stage pipeline architecture characteristic of the original PIC16C5X baseline family. Key features include 72 bytes of RAM, 20 I/O pins, a hardware timer/counter, watchdog timer, and a wide operating voltage range. The HSE oscillator suffix indicates the part supports an external high-speed clock source, allowing the engineer to feed a crystal/oscillator up to 20 MHz for deterministic instruction-cycle timing. The /SS suffix denotes the 28-SSOP surface-mount package with 0.209" (5.30 mm) body width, which is pin-compatible with the PIC16C55 and PIC16C56 in the same family. Typical applications include low-cost appliance controllers, LED display drivers, remote controls, automotive body electronics (non-safety), and simple sensor interfacing. The OTP program memory makes it suited to production volumes where mask-ROM economies of scale are not justified. When designing, note that the PIC16C57 is a legacy 5V device with no on-chip debug or flash reprogramming; code must be committed at production time and the part requires a UV windowed variant (JW) for code iteration. Verify OTP programming equipment compatibility (e.g., MPLAB PM3) before committing to this part.

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PIC16C57-HSI/P - 8-Bit 20MHz OTP MCU, 3KB EPROM | Microchip
PIC16C57-HSI/P

PIC16C57-HSI/P - 8-Bit 20MHz OTP MCU, 3KB EPROM | Microchip

The Microchip Technology PIC16C57-HSI/P is an 8-bit RISC CMOS microcontroller running at 20 MHz with 3 KB (2K x 12) of one-time-programmable (OTP) EPROM program memory, 72 bytes of RAM, and 20 digital I/O lines, housed in a 28-pin PDIP (DIP-28, 0.600 inch) through-hole package. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory, volatile working RAM, and configurable peripheral I/O onto one piece of silicon. The PIC16C5X series uses a 12-bit wide instruction word with an 8-bit data path, achieving roughly 2:1 code compression versus other 8-bit MCUs in its class. Within the broader taxonomy, this part belongs to: microcontroller -> 8-bit MCU -> PIC16 family -> PIC16C5x sub-family -> OTP EPROM variant -> RISC architecture -> CMOS semiconductor. The "HSI" suffix designates a high-speed crystal/oscillator variant rated for 20 MHz operation, while "/P" indicates the PDIP-28 plastic package. Key features include 33 single-word instructions (single-cycle except branches), a two-level hardware stack, direct/indirect/relative addressing modes, an 8-bit real-time clock/counter (TMR0) with programmable prescaler, power-on reset (POR), watchdog timer (WDT), and a programmable code-protect feature. Operating voltage spans 3.0 V to 5.5 V at industrial temperature range (-40C to +85C). All 20 I/O pins are bidirectional with individually programmable direction registers and high-current sink/source capability. Typical applications for the PIC16C57-HSI/P include embedded control boards, sensor interface modules, user-interface/keypad controllers, low-cost industrial automation nodes, and legacy system maintenance builds. Its high oscillator frequency makes it suited for applications requiring tighter timing loops than the lower-frequency RC variants (e.g., PIC16C57-RC/P, PIC16C57-LP/P) can deliver. When designing with this part, note that OTP EPROM cannot be electrically erased - firmware is finalized at programming time. For development cycles, use a windowed CERDIP (-JW) or flash-based PIC16F57 part instead. Decoupling VDD/VSS with 100 nF ceramic caps placed within 5 mm of the pins is recommended; MCLR must be pulled high through a 10 kohm resistor for normal operation. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.

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PIC16C57-HSI/SO - 8-Bit 20MHz OTP MCU 3KB | Microchip
PIC16C57-HSI/SO

PIC16C57-HSI/SO - 8-Bit 20MHz OTP MCU 3KB | Microchip

The Microchip Technology PIC16C57-HSI/SO is an 8-bit CMOS microcontroller from the PIC® 16C family, featuring a 20MHz maximum CPU clock, 3KB (2K x 12) of One-Time-Programmable (OTP) program memory, and 72 bytes of RAM. It is housed in a 28-pin SOIC (7.50mm/0.295in width) surface-mount package with 20 I/O pins, optimized for cost-sensitive embedded control applications where deterministic performance and code density matter more than large memory footprints. A microcontroller (MCU) is a single-chip computer that integrates a CPU, RAM, non-volatile program memory, and peripheral I/O on one die. The PIC16C5X family specifically sits within the broader taxonomy of microcontrollers -> 8-bit microcontrollers -> CMOS microcontrollers -> RISC microcontrollers -> embedded controllers. Its Harvard architecture separates program and data buses, while 12-bit-wide instructions deliver roughly 2:1 code compression versus competing 8-bit CISC architectures, allowing more functionality in less program memory. Key features include a 20MHz high-speed internal oscillator variant (the HSI suffix denotes factory-programmed HS oscillator mode with internal clock options), 8-bit real-time clock/counter (TMR0), two-level deep hardware stack, and seven or eight special function hardware registers. The device supports direct, indirect, and relative addressing modes for both data and instructions, and operates from a single 5V supply over the commercial/industrial temperature range. The PIC16C57 architecture uses a fully static CMOS design, meaning the clock can be stopped without losing internal state. This makes it well suited for low-power or battery-friendly designs where the oscillator is duty-cycled. The 12-bit instruction set and 33 single-word/single-cycle instructions reduce program-memory pressure, while the two-level hardware stack constrains subroutine nesting to two levels, an important constraint for C or high-level-language users porting code. Typical applications include appliance control, sensor signal conditioning, LED drivers, simple motor control, remote keyless entry, security panels, and consumer white-goods user interfaces. The 20 I/O pins can directly drive LEDs, sink relays via transistors, and read keypad matrices, making the device a versatile general-purpose controller. When designing with this part, observe the OTP programming limitation: the device cannot be re-flashed after programming, so debug must occur on a windowed (JW) or EPROM emulator variant first. Decoupling VDD with a 0.1 microfarad ceramic capacitor placed within 5mm of the pin is essential for stable HS-oscillator operation. This page synthesizes distributor pricing, parametric drop-in alternatives, and practical design notes not found in the manufacturer datasheet, drawing on PIC16C5X family documentation and Microchip application notes.

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PIC16C57-HSI/SP - 8-bit EPROM MCU, 3KB, 20MHz, SPDIP-28 | Microchip
PIC16C57-HSI/SP

PIC16C57-HSI/SP - 8-bit EPROM MCU, 3KB, 20MHz, SPDIP-28 | Microchip

The Microchip PIC16C57-HSI/SP is an EPROM/ROM-based 8-bit CMOS microcontroller from the PIC16C5X family, offering 3KB of one-time-programmable (OTP) program memory, 72 bytes of RAM, and 20 digital I/O pins in a 28-pin SPDIP (Skinny Plastic DIP) through-hole package. It executes most instructions in a single 200ns instruction cycle when clocked from an external 20MHz high-speed oscillator source (the "HSI" speed grade). The device is built on a low-cost, fully-static CMOS architecture featuring a 12-bit-wide instruction word and an 8-bit data path, which delivers approximately 2:1 code compression over competing 8-bit microcontrollers in the same price class. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory, working RAM, and peripheral interfaces such as timers, I/O ports, and interrupt controllers into one package. The PIC16C5X family occupies the entry-level, cost-sensitive tier of the broader 8-bit microcontroller category, sitting below PIC16 enhanced mid-range parts and PIC18 high-performance 8-bit families in the Microchip hierarchy. PIC microcontrollers are widely used as the "brain" of embedded systems that require deterministic real-time response, low power consumption, and reprogrammability during prototyping. Key features of the PIC16C57-HSI/SP include an 8-bit real-time clock/counter (TMR0) with an 8-bit programmable prescaler, a two-level deep hardware stack for subroutine nesting, and three addressing modes: direct, indirect, and relative. The device offers seven or eight special-function hardware registers, an internal reset circuit, and a watchdog timer option that can be enabled via configuration bits. Power consumption is low due to CMOS technology, with multiple sleep/idle modes for battery-powered designs. I/O pins can source or sink up to 25mA per pin, allowing direct drive of LEDs and small relays. Typical applications span consumer electronics, appliance control, automotive subsystems, industrial sensor interfaces, and educational/development platforms. The 20 I/O lines support keypad scanning, LED multiplexing, LCD bias generation, and serial communication via bit-banged protocols (UART, SPI, I2C implemented in software). The 28-pin SPDIP package makes the part well suited for hand-soldered prototypes, breadboards, and low-volume production runs where through-hole assembly is preferred. When designing with the PIC16C57-HSI/SP, note that the part is OTP (one-time-programmable) and does not support in-circuit reprogramming. The "HSI" suffix denotes a high-speed crystal/oscillator mode with a 20MHz maximum frequency, distinct from "RC" (resistor-capacitor timing) and "LP" (low-power crystal) oscillator variants. Choose the HSI version when instruction throughput is critical; choose RC or LP when cost, board space, or power consumption is the priority. This page synthesizes distributor pricing, package-compatible drop-in alternatives from the same PIC16C5X family, and practical design notes not found in the manufacturer datasheet. For OEM-scale volumes consider the mask-ROM equivalents (PIC16CR57) for unit-cost reduction once firmware is finalized.

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PIC16C57-LP/P - 8-Bit OTP MCU, 3KB, 20 I/O, 28-DIP | Microchip
PIC16C57-LP/P

PIC16C57-LP/P - 8-Bit OTP MCU, 3KB, 20 I/O, 28-DIP | Microchip

The Microchip PIC16C57-LP/P is an EPROM/ROM-based 8-bit CMOS microcontroller from the PIC16C5X family, supplied in a 28-pin PDIP (DIP-28) through-hole package and rated for the commercial 0C to +70C operating range. The device integrates 3 KB of one-time-programmable (OTP) program memory, 72 bytes of RAM, and 20 digital I/O pins, while operating from a 2.5 V to 6.25 V supply at up to 40 kHz in its low-power (LP) oscillator mode. Its 12-bit-wide instruction set with an 8-bit data path, two-level hardware stack, and direct/indirect/relative addressing modes deliver 2:1 code compression versus competing 8-bit MCUs of the same era. What is a PIC16C5X microcontroller? The PIC16C5X is Microchip's original low-cost, high-performance 8-bit fully-static OTP/EPROM microcontroller family. In the broader taxonomy it sits as an 8-bit microcontroller -> general-purpose MCU -> embedded controller -> semiconductor. The OTP variants are intended for prototype runs and small-to-medium production where field firmware updates are not required; ROM-mask parts serve high-volume programs. The PIC16C57 is the largest-memory member of the family and is one of the longest-running legacy 8-bit cores still supported by modern MPLAB tools. Key features of the PIC16C57-LP/P include an 8-bit real-time clock/counter (TMR0) with an 8-bit programmable prescaler, a watchdog timer for unattended recovery, power-saving SLEEP mode, on-chip RC oscillator support, and an internal interrupt structure. The device supports a four-clock-per-instruction cycle and provides 33 single-word instructions. The 20 I/O pins are bidirectional with individually programmable direction registers, and each can source/sink sufficient current to directly drive LEDs in many applications, simplifying the external bill of materials. Technically, the PIC16C57 uses a Harvard architecture with separate program and data buses, enabling simultaneous instruction fetch and data access. Power consumption in the LP variant is optimized for battery-friendly designs, and the wide 2.5 V to 6.25 V supply range tolerates unregulated rails. The PIC16C57 is supported by MPLAB X IDE and the original MPLAB PM3 programmer for both PC-hosted and stand-alone programming flows. Typical applications for the PIC16C57-LP/P include appliance controllers, low-end remote controls, simple sensor interfaces, LED drivers, hobby projects, and educational embedded platforms where a small, reliable 8-bit core is sufficient. Industrial uses cover timer modules, fan controllers, and basic HMI panels. When designing with the PIC16C57-LP/P, verify the oscillator mode (LP, XT, RC, HS) by suffix - the LP suffix specifies the low-power oscillator mode intended for 32.768 kHz watch crystals and very low standby current. Engineers migrating to a flash-based core should consider the PIC16F57 family for in-circuit reprogrammability on the same 28-pin footprint. This page synthesizes distributor stock and pricing, drop-in alternative MPNs, application-specific guidance, and engineering design notes - not just a restatement of the manufacturer datasheet.

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PIC16C57-LP/SP - 8-Bit 40MHz 3KB OTP MCU 28-SPDIP | Microchip
PIC16C57-LP/SP

PIC16C57-LP/SP - 8-Bit 40MHz 3KB OTP MCU 28-SPDIP | Microchip

The Microchip Technology PIC16C57-LP/SP is an 8-bit CMOS RISC microcontroller from the PIC16C5X baseline family, delivering 40 MHz (200 ns instruction cycle) performance with 3KB (2K x 12) of One-Time-Programmable (OTP) program EPROM, 72 bytes of RAM, and 20 digital I/O pins in a 28-pin SPDIP (0.300 inch / 7.62 mm) through-hole package. Designed for low-power embedded control, the device operates from a 3.0V to 6.0V supply with an LP (Low-Power) oscillator variant for battery-friendly designs, and it uses a 12-bit wide, highly symmetric instruction set that yields approximately 2:1 code compression over competing 8-bit MCUs in its class. A baseline PIC (Peripheral Interface Controller) microcontroller is a compact RISC processor that integrates CPU core, non-volatile program memory (ROM/EPROM/Flash), volatile data RAM, and configurable I/O on a single die. The PIC16C5X sub-family belongs to Microchip's original 12-bit instruction baseline architecture, sitting beneath the mid-range PIC14/16 enhanced core but above 4-bit and 8-bit PIC10/12 devices in capability, and it is one of the earliest families in the broader PICmicro hierarchy that eventually grew into today's PIC18, dsPIC, and PIC32 product lines. Key features of the PIC16C57-LP/SP include: 2K x 12-bit OTP program memory (single-programmed, not re-programmable in-circuit), 72 bytes of general-purpose RAM, 20 bidirectional digital I/O pins arranged across ports A/B/C, an 8-bit timer/counter (TMR0) with 8-bit prescaler, watchdog timer with on-chip RC oscillator, power-on reset, brown-out protection (depending on configuration), and an LP (low-power) oscillator option suited for 32.768 kHz crystal operation. The RISC architecture executes most instructions in a single 200 ns cycle at 20 MHz, achieving approximately 5 MIPS throughput. Typical applications include low-power consumer appliances, simple sensor interfaces, battery-operated controllers, automotive body electronics (pre-CAN era), remote controls, and industrial counter/timer modules where small code size, deterministic instruction timing, and through-hole serviceability matter more than flash re-programmability. When designing with this part, note that OTP memory cannot be erased or rewritten - firmware must be fully validated on a windowed or flash equivalent before committing. The /SP package is the 28-pin SPDIP variant; for surface-mount assembly choose the /SO (SOIC-28) or /SS (SSOP-28) siblings. This page synthesizes distributor pricing, drop-in PIC16C5X siblings, and practical design notes not aggregated in any single manufacturer datasheet or distributor page.

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