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PIC16C57-XTE/SP - 8-Bit OTP MCU, 4MHz, 2KB EPROM | Microchip
PIC16C57-XTE/SP

PIC16C57-XTE/SP - 8-Bit OTP MCU, 4MHz, 2KB EPROM | Microchip

The Microchip Technology PIC16C57-XTE/SP is a member of the PIC16C5X family of low-cost, high-performance, 8-bit fully static EPROM/ROM-based CMOS microcontrollers. Housed in a 28-pin SPDIP (Skinny Plastic DIP) package, this device integrates 2KB of one-time-programmable (OTP) EPROM program memory organized as 2K x 12 words and 72 bytes of on-chip data RAM. It supports a maximum clock frequency of 40MHz (4MHz at the XTE speed grade) and operates from 3.0V to 5.5V. What is an 8-bit OTP microcontroller? An 8-bit OTP microcontroller is a small single-chip computer built around an 8-bit data path that executes instructions stored in one-time-programmable non-volatile memory. Within the broader taxonomy of semiconductors, the PIC16C57 belongs to the microcontroller (MCU) family, then to the 8-bit MCU sub-class, then to the OTP EPROM-based MCU series, and ultimately to the Microchip PIC16C5X entry-level family. This hierarchy makes it well suited for cost-sensitive embedded control where Flash reprogrammability is not required. Key features include a RISC instruction set with 33 single-word, single-cycle instructions, 12-bit wide opcodes yielding 2:1 code compression over typical 8-bit competitors, and 20 general-purpose digital I/O lines arranged across ports RA, RB, RC, and RD. The device includes an 8-bit timer/counter (TMR0) with an 8-bit programmable prescaler, a watchdog timer with its own on-chip RC oscillator for reliable reset, and a power-on reset circuit. The two-stage instruction pipeline enables most instructions to execute in a single 250ns instruction cycle at 16MHz. Typical applications include consumer appliance control, automotive body electronics (non-safety), HVAC damper and fan control, simple sensor interfaces, remote-control transmitters, battery chargers, and low-cost industrial timer/sequencer designs. Because the program memory is windowed EPROM (erasable only by UV exposure in the ceramic JW package, or one-time programmable in the plastic SPDIP variant), the XTE/SP version is intended primarily for production volumes where firmware is fixed and validated. When designing with this device, note that the PIC16C57 uses a 12-bit program counter and cannot directly access large linear memory spaces, so complex C code is uncommon; assembly language or the free MPASM toolchain is the typical development path. Programming is performed via Microchip's MPLAB PM3 universal device programmer. The 'XTE' suffix denotes the extended-temperature grade (-40C to +85C) with the standard PIC16C5X speed grade (DC to 4MHz oscillator). This page synthesizes distributor pricing, parametric cross-references to compatible PIC16C5X family members, and practical design notes not found in the manufacturer datasheet alone.

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PIC16C57-XTE/SS - 8-Bit OTP MCU, 4MHz, 28-SSOP | Microchip
PIC16C57-XTE/SS

PIC16C57-XTE/SS - 8-Bit OTP MCU, 4MHz, 28-SSOP | Microchip

The Microchip Technology PIC16C57-XTE/SS is an 8-bit CMOS RISC microcontroller with 2K x 12 (3 KB) One-Time Programmable (OTP) EPROM program memory, housed in a 28-pin SSOP (Shrink Small Outline Package, 5.30 mm body width). It operates from a 5 V supply at a maximum clock frequency of 4 MHz (the "XT" speed grade), delivering up to 20 I/O lines arranged across multiple ports, 72 bytes of on-chip data RAM, and 33 single-word single-cycle instructions. Peripherals include a Watchdog Timer (WDT), Power-on Reset (POR), and two 8-bit timers. The device belongs to the PIC16C5X baseline family and is intended for surface-mount high-volume cost-sensitive embedded designs. An 8-bit microcontroller (MCU) is a small, self-contained computer-on-a-chip integrating a CPU, program memory, working RAM, I/O peripherals, and timers into a single silicon die. Within the broader semiconductor taxonomy, an MCU is a subclass of microprocessor (MPU -> MCU), and the PIC16C5X family sits in the low-cost baseline segment (baseline -> mid-range -> enhanced mid-range), optimized for deterministic real-time control rather than raw computational throughput. The Harvard-style architecture with separate program and data buses allows instructions to be fetched and executed in a single cycle, which is why most PIC instructions complete in one oscillator period. Key differentiating features include the 4 MHz "XT" oscillator variant (a crystal/ceramic-resonator speed grade vs the lower-frequency "LP" and higher-frequency "HS" grades), the OTP-EPROM program memory window (versus windowed EPROM "JW" or QTP/sqTP pre-programmed variants), 20-digit code-protection capability for IP security, and the SSOP 0.209" 5.30 mm wide surface-mount footprint. The 12-bit wide instruction word is characteristic of the baseline PIC16C5X family and should not be confused with the 14-bit mid-range cores. The architecture follows Microchip's classic RISC design with only 33 single-word/single-cycle instructions, two file-select registers for context switching, and an 8-level hardware stack (no software-managed stack pointer). This simplicity translates into deterministic interrupt response and small code footprints. The device operates across the industrial 0 to +70 °C commercial temperature range ("-E" suffix = extended commercial), with Vdd between 2.5 V and 6.25 V depending on the oscillator configuration. Typical applications include low-cost consumer appliances, white goods, automotive interior accessories, HVAC thermostat controls, simple sensor front-ends, and remote-control transmitters where deterministic timing, small BOM, and OTP-based cost optimization outweigh the need for in-system reprogrammability. Designers pair the PIC16C57 with low-cost 4 MHz ceramic resonators or crystals and use ICD or MPLAB PM3 programmers for code development and production programming. When designing with this device, remember that the OTP variant cannot be reprogrammed, so design verification must occur on a windowed "JW" prototype or on the flash-based PIC16F5X equivalent before committing to OTP production parts. The 8-level hardware stack limits nested subroutines to depth eight; deeper call chains must be unrolled. The PIC16C5X baseline core lacks interrupts on most variants - check the device errata before designing interrupt-driven code. This page synthesizes distributor pricing, drop-in same-family alternatives from the Site MPN catalog, and practical design notes not collected in any single manufacturer datasheet, giving embedded engineers a faster selection path than scrolling through DigiKey or Mouser listings.

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PIC16C57-XTI/P - 8-Bit 4MHz 3KB OTP MCU 28-PDIP | Microchip
PIC16C57-XTI/P

PIC16C57-XTI/P - 8-Bit 4MHz 3KB OTP MCU 28-PDIP | Microchip

The Microchip PIC16C57-XTI/P is an 8-bit CMOS microcontroller from the PIC16C5X family, featuring 3KB (2K x 12) of One-Time-Programmable (OTP) program memory, 72 bytes of RAM, and 20 I/O pins in a 28-pin PDIP (Plastic Dual In-line Package). It operates at a 4 MHz oscillator frequency with an industrial temperature range of -40C to +85C and is suitable for embedded control applications requiring a compact, low-pin-count architecture. The PIC16C5X family uses a Harvard RISC-style architecture with 12-bit-wide instructions and a 33-instruction set, providing roughly 2:1 code compression versus other 8-bit microcontrollers in its class. An 8-bit microcontroller (MCU) is a single-chip computer containing a CPU, program memory, data RAM, and peripheral interfaces on one die. Within the broader taxonomy, the PIC16C57 belongs to the 8-bit MCU hypernym -> microcontroller family -> embedded IC -> semiconductor. The 'C' suffix indicates CMOS EPROM/OTP program memory (versus 'F' for Flash and 'CR' for ROM), and the PIC16C5X series is one of Microchip's foundational mid-range architectures predating the later PIC16F and PIC18 families. OTP memory is programmed once and is non-erasable, which makes the part cost-effective for high-volume production but unsuitable for firmware revision. Key features of the PIC16C57-XTI/P include 12-bit instruction width, 33 single-cycle instructions (excluding branches), two 8-bit timer/counters (TMR0 with 8-bit programmable prescaler, TMR1), a watchdog timer with on-chip RC oscillator, and a power-on reset (POR) circuit. The device operates over a 2.5V to 6.25V VDD range and consumes very low operating current thanks to its CMOS design. The -XTI suffix designates a 4 MHz crystal/oscillator industrial-temperature-grade variant in PDIP packaging. Architecturally, the PIC16C57 uses a 2-stage pipeline with an 8-bit data path and a separate 12-bit program path (Harvard architecture). Its 8-level deep hardware stack limits subroutine nesting to 8 levels, which constrains complex C compilers but suits compact assembly-level firmware. The device has four interrupt sources with a fixed interrupt vector and supports direct, indirect, and relative addressing modes. Typical applications include consumer appliance controls, automotive body electronics (non-safety), industrial sensor front-ends, low-cost remote controls, and battery-powered metering. The 20 available I/O pins make it well-suited to small user-interface boards and LED/keypad scan matrices. Because the PIC16C57 is mature and well-documented, it remains popular in maintenance-of-existing-design and legacy industrial equipment scenarios. When designing with the PIC16C57-XTI/P, engineers should use the MPLAB PM3 Universal Device Programmer (or a compatible gang programmer) and the MPLAB IDE v8.x or earlier for assembly development. Designers must budget the 8-level hardware stack carefully and avoid C compilers that require deep call nesting. For new designs, the PIC16F57 or PIC16F57 Flash variant offers in-circuit reprogrammability with pin-compatible migration paths. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found on a single manufacturer or distributor datasheet page.

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PIC16C57-XTI/SS - 8-bit 4MHz 3KB OTP MCU 28-SSOP | Microchip
PIC16C57-XTI/SS

PIC16C57-XTI/SS - 8-bit 4MHz 3KB OTP MCU 28-SSOP | Microchip

The Microchip Technology PIC16C57-XTI/SS is a member of the PIC16C5X family of low-cost, high-performance 8-bit fully static EPROM/ROM-based CMOS microcontrollers. It integrates a RISC CPU core running up to 4 MHz, 3 KB of OTP program memory (2K x 12 words), and 72 bytes of general-purpose RAM in a 28-pin SSOP (Shrink Small Outline Package) with industrial -40C to +85C temperature grade. The -XTI/SS suffix denotes the industrial temperature range and SSOP tube packaging per Microchip ordering nomenclature. An 8-bit PIC microcontroller is a single-chip computer that combines a CPU, non-volatile program memory (here, One-Time Programmable EPROM), working RAM, and configurable I/O on one die. PIC microcontrollers sit within the broader hierarchy of microcontrollers -> microcontrollers and microprocessors -> integrated circuits -> semiconductors, and dominate cost-sensitive embedded control because the RISC architecture uses only 33 single-word/single-cycle instructions, yielding highly compact code and predictable deterministic timing. Key features of the PIC16C57-XTI/SS include a 12-bit instruction word, two-level hardware stack, 20-pin equivalent I/O, an 8-bit real-time timer/counter (TMR0), direct/indirect/relative addressing, watchdog timer, power-on reset, and brown-out detection. The EPROM-based program memory allows rapid prototyping before committing to a ROM mask part, while the 4 MHz oscillator supports both RC and crystal/ceramic resonator modes. Architecturally, the device uses a Harvard bus with separate program and data paths, enabling instruction fetch and data access in the same cycle. CMOS fabrication delivers low power consumption with standby currents typically below 4 uA at 5V, suitable for battery-backed or energy-harvesting designs. With seven or eight special function hardware registers and 33 instruction opcodes, the learning curve is among the shortest in the industry. Typical applications include appliance controls, security and alarm panels, automotive body electronics (non-safety), low-end remote controls, sensor signal conditioning, lighting ballasts, and small industrial timer or counter modules. The wide 2.5V to 6.0V Vdd range allows direct operation from 3.3V or 5V rails. When designing with the PIC16C57-XTI/SS, confirm EPROM programming infrastructure (windowless OTP requires a programmer such as MPLAB PM3) and verify the industrial -40C to +85C temperature range matches deployment conditions. For higher pin counts, more memory, or in-circuit programmability, migrate to PIC16F57 or PIC16F84A. This page synthesizes distributor pricing, drop-in alternatives from the PIC16C5X family, and practical design notes not found in the bare manufacturer datasheet, optimized for procurement and engineering teams evaluating legacy 8-bit MCU replacements.

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PIC16C57C-04/SS - 4MHz 8-Bit OTP MCU 3KB 28-SSOP | Microchip
PIC16C57C-04/SS

PIC16C57C-04/SS - 4MHz 8-Bit OTP MCU 3KB 28-SSOP | Microchip

The Microchip Technology PIC16C57C-04/SS is a CMOS OTP-based 8-bit microcontroller from the PIC16C5X family, delivering 4 MHz (4 MHz oscillator / 100 ns instruction cycle) processing in a 28-pin SSOP package. The device integrates 3 KB of OTP program memory (2K × 12 words) and 72 bytes of RAM with 20 digital I/O lines, and it is specified for operation from 2.5 V to 5.5 V across the commercial 0 °C to +70 °C range (C suffix). It executes 33 single-word, 12-bit RISC instructions and uses a 2-level hardware stack. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, working RAM, and peripheral I/O. PIC microcontrollers belong to the Modified Harvard RISC architecture family, where program and data memories are separate buses. The PIC16C5X baseline sub-family targets cost-sensitive, deterministic 8-bit control tasks in white goods, automotive body electronics, and industrial sensors; in the broader taxonomy it sits under PIC microcontrollers -> 8-bit MCUs -> microcontrollers -> microprocessors & controllers -> semiconductors. Key features of the PIC16C57C-04/SS include 3 KB one-time-programmable (OTP) program memory allowing user-coded firmware, four 8-bit I/O ports (RA, RB, RC, RD), an 8-bit real-time timer/counter (TMR0) with programmable prescaler, a watchdog timer for reliable operation, and power-saving Sleep mode. A 4 MHz external crystal or RC oscillator drives the internal clock, and a /MCLR reset pin is provided. The OTP architecture is suited to mature, low-cost production where firmware is finalized and field re-programmability is not required. The 28-pin SSOP (209 mil, 1.0 mm pitch) package is the shrink-SOIC variant of the 28-pin SPDIP, sharing the same 1.27 mm row pitch in a more compact outline. Designers moving between the PIC16C55/56/57 family can substitute compatible parts across SPDIP, SOIC, and SSOP footprints provided pin ordering and pin-1 orientation are observed. Typical applications include remote-control encoders, simple sensor conditioning, LED chase or display drivers, battery chargers, fan/motor control, automotive body controllers, and low-cost consumer appliances. The 100 ns instruction execution supports deterministic bit-banged protocols and timing loops. The combination of 20 I/O, 3 KB OTP, 72 B RAM, and a 4 MHz clock makes the part a workhorse baseline PIC for high-volume, cost-driven embedded designs where a C-programmable flash MCU is over-specified. When designing with this device, use a 4.7 kΩ pull-up on /MCLR to VDD, place a 0.1 µF decoupling capacitor on VDD near the IC, and choose a 4 MHz crystal with 22 pF loading capacitors. The /MCLR pin must never be left floating, and unused I/O should be configured as outputs low to minimize current draw. This page synthesizes the Microchip PIC16C57C-04/SS datasheet with current DigiKey / Mouser / Octopart pricing, same-package SSOP drop-in alternatives, application guidance, and pinout data not consolidated in any single distributor listing.

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PIC16C57C-04E/SP - 8-Bit 4MHz OTP MCU, 3KB, 28-SPDIP | Microchip
PIC16C57C-04E/SP

PIC16C57C-04E/SP - 8-Bit 4MHz OTP MCU, 3KB, 28-SPDIP | Microchip

The Microchip Technology PIC16C57C-04E/SP is an 8-bit EPROM/ROM-based CMOS microcontroller from the PIC16C5X family, operating at 4 MHz with 3 KB (2K x 12) 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. The "04E" suffix denotes the 4 MHz oscillator variant with the extended industrial temperature grade (-40C to +125C), while "/SP" identifies the 28-SPDIP package and tube shipping format. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, working RAM, and peripheral I/O into one IC. The PIC16C5X family sits at the low-cost end of the 8-bit microcontroller taxonomy, between simple 4/8-bit PIC10/PIC12 devices and the more feature-rich PIC16 enhanced and PIC18 families. By using 12-bit-wide instructions with 33 single-word instruction set, the PIC16C57C achieves roughly 2:1 code compression versus competitive 8-bit MCUs, allowing small OTP programs to fit cost-sensitive assemblies without external memory. Key features of the PIC16C57C-04E/SP include 100 ns instruction cycle time at 4 MHz oscillator input, a wide 3.0 V to 5.5 V single-supply operating range, a programmable 8-bit timer (TMR0) with 8-bit prescaler, watchdog timer with on-chip RC oscillator for reliable reset behavior, power-saving SLEEP mode, and on-chip power-on reset (POR). The 20 I/O pins support individual direction control, with high-current sink/source capability for direct LED and relay drive. Code protection and a 12-bit instruction word target compact, deterministic control loops rather than complex protocol stacks. Architecturally, the PIC16C57C uses a Harvard RISC core with separate program and data buses, a hardware ALU, and an 8-level deep stack that supports interrupt-free subroutine nesting. The OTP program memory is programmed once via Microchip's standard ICSP serial protocol and cannot be erased, making this part best suited for mature production where firmware is final; for field-reprogrammable designs, a Flash-based PIC16F57 is the closest replacement with the same pinout and peripheral set. Typical applications include appliance control boards, automotive body modules (seat, mirror, lighting), industrial sensor interfaces, low-end remote controls, simple user-interface panels, and battery-powered smart sensors. The wide supply range, robust ESD/latch-up characteristics, and extended temperature grade make the -04E/SP variant especially attractive for under-hood automotive, outdoor industrial, and HVAC systems. When designing with the PIC16C57C, keep the oscillator selection short and use a 100 nF decoupling capacitor close to VDD, plus a 10-47 uF bulk capacitor. Note that OTP memory cannot be re-programmed; budget engineering time for prototype validation on a windowed (JW) or Flash equivalent before committing firmware to OTP. This page combines verified distributor pricing, parametric alternatives, application guidance, and AEO-optimized FAQs drawn from Microchip PIC16C5X datasheet content, with value beyond the bare manufacturer datasheet.

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PIC16C57C-04E/SS - 8-bit OTP MCU 4MHz 3KB 28-SSOP | Microchip
PIC16C57C-04E/SS

PIC16C57C-04E/SS - 8-bit OTP MCU 4MHz 3KB 28-SSOP | Microchip

The Microchip Technology PIC16C57C-04E/SS is an 8-bit CMOS RISC microcontroller belonging to the PIC16C5X family, featuring a 4MHz maximum core clock, 3KB (2K x 12) of One-Time Programmable (OTP) program memory, and 72 bytes of RAM, housed in a 28-pin SSOP package. The device executes instructions in a 100 ns single-cycle period and supports 33 single-word instructions, providing roughly 2:1 code compression versus other 8-bit MCUs in its class. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, working RAM, and peripheral interfaces into one package. The PIC16C57C falls under the broader taxonomy: microcontroller -> embedded controller -> 8-bit MCU -> RISC MCU -> CMOS OTP MCU -> semiconductor. As an OTP device it can be programmed exactly once, which makes it suited to high-volume fixed-function products rather than field-upgradeable designs. Key features include 20 general-purpose digital I/O pins, a 4MHz internal operating frequency (-04 speed grade), 8-bit timer/counter resources, a watchdog timer for reliable unattended operation, power-on reset, brown-out detection, and a wide 3.0V to 5.5V supply range. The SSOP-28 footprint enables compact board layouts while still supporting hand-soldering or standard SMT lines. Architecturally the device uses a Harvard RISC core with separate program and data paths, a 12-bit wide instruction word, and a two-stage pipeline. The CMOS process delivers low power consumption ideal for always-on appliances, while the OTP program memory gives designers stable firmware that cannot be read back through the external pins, providing a baseline level of code protection. Typical applications include white-goods and small-appliance control boards, automotive body modules (non-safety), industrial sensor front ends, simple user-interface panels, and consumer remote-control transmitters. The wide operating voltage also makes it appropriate for 5V-regulated industrial nodes. When designing with the PIC16C57C, allow adequate decoupling on VDD/VSS pairs, route MCLR with proper pull-up, and confirm the oscillator configuration matches the chosen resonator. OTP parts require pre-production verification via a windowed (JW) counterpart before committing the final code. This page synthesizes distributor pricing, pin-compatible drop-in alternatives, and engineering design notes that go beyond the information in the bare datasheet, helping engineers shorten sourcing and BOM decisions.

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PIC16C57C-04I/P - 8-Bit 4MHz OTP MCU 28-PDIP | Microchip
PIC16C57C-04I/P

PIC16C57C-04I/P - 8-Bit 4MHz OTP MCU 28-PDIP | Microchip

The Microchip Technology PIC16C57C-04I/P is an 8-bit EPROM/ROM-based CMOS microcontroller from the PIC16C5X family, delivering 4MHz operation, 3KB (2K x 12) of One-Time-Programmable (OTP) program memory, and 20 digital I/O pins housed in a 28-pin PDIP package. The '04' speed grade corresponds to a 4MHz oscillator input and 100ns instruction cycle time. The 'I' suffix denotes the industrial temperature range of -40C to +85C, and the 'P' suffix denotes the through-hole PDIP-28 package. What is an OTP microcontroller? An OTP microcontroller integrates non-volatile program memory (EPROM-based, programmable once) directly on-chip alongside the CPU core, RAM, and peripherals. OTP microcontrollers sit within the broader taxonomy of microcontroller (MCU) -> embedded controller -> semiconductor, and historically served as the lowest-cost path to volume production before flash-based MCUs became ubiquitous. The PIC16C5X family uses a RISC architecture with 33 single-word, single-cycle instructions and a 12-bit instruction word with an 8-bit data path. Key features of the PIC16C57C-04I/P include 72 bytes of RAM, two-level deep hardware stack, 8-bit real-time clock/counter (TMR0), watchdog timer, power-on reset, and seven or eight special function hardware registers. The device supports direct, indirect, and relative addressing modes for both data and instructions. All PIC16C5X devices are fully static, allowing the clock to be stopped for power-saving sleep states without losing register contents. The PIC16C57C architecture uses a Harvard-style memory layout that separates program and data buses. With its 12-bit instruction width and 2:1 code compression versus competitors in its class, the device delivers high code density. The 28-pin PDIP package provides generous I/O headroom for legacy industrial control, automotive (non-safety), and appliance applications where through-hole assembly is preferred for hand-prototyping and field serviceability. Typical applications include low-cost embedded control for appliances, automotive body electronics, industrial control modules, simple sensor interfaces, and educational/development platforms. The OTP memory suits medium-volume production runs where firmware is fixed and field firmware updates are not required. Industrial-grade temperature range supports factory-floor deployments. When designing with this device, consider the OTP memory limitation carefully: code bugs cannot be patched in-circuit. Plan for a development flow using windowed (JW) or UV-erasable parts for prototyping, then move to the OTP 'C' variant for production. Ensure adequate decoupling (100nF ceramic plus bulk) on VDD, and respect the maximum I/O source/sink ratings of 25mA per pin. This page synthesizes distributor pricing, drop-in alternative listings, and practical design notes not found in the manufacturer datasheet alone.

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PIC16C57C-20/P - 8-Bit 20MHz 3KB OTP MCU | Microchip 28-PDIP
PIC16C57C-20/P

PIC16C57C-20/P - 8-Bit 20MHz 3KB OTP MCU | Microchip 28-PDIP

The Microchip Technology PIC16C57C-20/P is an 8-bit CMOS microcontroller in the PIC16C5x family, featuring a 20 MHz maximum clock, 3 KB (2K x 12) of One-Time-Programmable (OTP) program memory, 72 bytes of data RAM, and 20 general-purpose digital I/O pins, housed in a 28-pin PDIP (0.600 in / 15.24 mm) through-hole package. The 'C' suffix denotes the CMOS process revision, while '20' indicates the 20 MHz maximum operating frequency and 'P' specifies the PDIP package. An 8-bit microcontroller (MCU) is a small, self-contained computing system on a single integrated circuit, integrating an 8-bit CPU core, program memory (ROM/EPROM/OTP/Flash), data RAM, peripheral interfaces, and I/O pins. Within the broader semiconductor taxonomy, an MCU sits inside the microcontroller -> embedded computing -> digital IC hierarchy. The PIC16C5x family specifically uses a RISC architecture with 33 single-word instructions and a 12-bit-wide instruction word, achieving 2:1 code compression versus competing 8-bit MCUs in its price class. It is part of the PIC architecture family, which is widely used in cost-sensitive, deterministic control applications. Key differentiating specifications include a 100 ns instruction execution time at 20 MHz, a two-level deep hardware stack, 8-bit real-time clock/counter (TMR0), and seven or eight special-function hardware registers. Addressing modes cover direct, indirect, and relative addressing for both data and instructions. Power consumption is held to a few milliamps at full speed thanks to the static CMOS core, with further reductions possible by lowering the clock frequency or using sleep/idle modes. The PIC16C57C-20/P is built on a fully static CMOS process, meaning the clock can be stopped and the device will retain state with negligible power draw - useful for battery-backed or interrupt-driven designs. The RISC-style 33-instruction set simplifies code generation and eases legacy support, while the OTP program memory allows fast prototype-to-production migration without the tooling overhead of windowed EPROM parts. Industrial and automotive-grade variants exist within the wider PIC16C5x line. Typical applications include appliance control (washing machines, microwave ovens, fan controllers), automotive subsystems (interior lighting, simple sensor interfaces), industrial control panels, low-cost remote controls, security keypads, and small embedded sensor conditioning boards. The 20 MHz CPU and 20 I/O lines cover most simple-to-mid complexity embedded control tasks. When designing with the PIC16C57C-20/P, ensure the OTP programming step is part of your production flow, as OTP parts cannot be erased or re-programmed. A 0.1 uF decoupling capacitor close to VDD is mandatory, and unused I/O should be configured as outputs low to minimize current draw. For new designs, evaluate the Flash-based PIC16F57-I/P successor first to gain reprogrammability and in-circuit debugging. This page synthesizes distributor stock levels, same-brand and cross-brand drop-in alternatives, and practical design notes that go beyond the manufacturer datasheet alone.

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PIC16C57C-20/SO - 8-Bit 20MHz 3KB OTP MCU | Microchip
PIC16C57C-20/SO

PIC16C57C-20/SO - 8-Bit 20MHz 3KB OTP MCU | Microchip

The Microchip Technology PIC16C57C-20/SO is an 8-bit CMOS OTP-based microcontroller in the PIC16C5X family, delivering 20MHz maximum clock speed with 100ns instruction execution and 3KB (2K x 12) of one-time-programmable program memory in a 28-pin SOIC package. The device uses a RISC architecture with only 33 single-word/single-cycle instructions, providing 2:1 code compression over competing 8-bit microcontrollers in its class and up to 20 I/O lines for peripheral interfacing. It integrates 72 bytes of RAM, a 12-bit instruction word, and operates over the commercial temperature range typical for embedded control. A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory (ROM/OTP/Flash), data RAM, and integrated peripherals. Within the broader hierarchy, microcontrollers belong to the embedded computing family, which also includes microprocessors, DSPs, and SoCs. The PIC16C5X family occupies the entry-level 8-bit RISC position in Microchip's portfolio, sitting below the PIC16F (Flash), PIC18 (enhanced 8-bit), and dsPIC (16-bit DSC) families. One-time-programmable (OTP) EPROM-based MCUs like the PIC16C57C are designed for high-volume production where firmware is finalized and field-reprogramming is not required. Key features of the PIC16C57C-20/SO include a fully static CMOS design supporting DC to 20MHz operation, 8-bit data width with 12-bit instruction width, 72 bytes of general-purpose RAM, a watchdog timer for reliable operation, a power-on reset circuit, and a code-protection feature for firmware security. The 28-SOIC package is suitable for surface-mount assembly in volume manufacturing, and the device is widely adapted for automotive, industrial, and consumer applications. Architecturally, the PIC16C57C uses a Harvard-style memory architecture with separate program and data paths. The 12-bit instruction word enables direct addressing of the full 2K x 12 program memory without paging, while the RISC instruction set keeps most operations single-cycle. This combination delivers deterministic interrupt latency and a compact code footprint. Typical applications include automotive subsystems, industrial controllers, appliance control, security panels, and consumer electronics that benefit from the proven PIC architecture and the low unit cost of OTP memory. The 20 I/O pins make it suitable for keyboard scanning, LED driving, relay control, and simple sensor interfaces. When designing with this part, note that OTP memory cannot be rewritten after programming - the device is intended for production designs where firmware is fully validated before mask programming. Use the JW windowed variant for engineering development.

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PIC16C57C-20/SP - 8-bit OTP MCU, 3KB, 20MHz, 28-SPDIP | Microchip
PIC16C57C-20/SP

PIC16C57C-20/SP - 8-bit OTP MCU, 3KB, 20MHz, 28-SPDIP | Microchip

The Microchip Technology PIC16C57C-20/SP is an 8-bit CMOS OTP-based microcontroller from the PIC16C5X family, packaged in a 28-pin SPDIP (Skinny Plastic DIP) through-hole package. It executes instructions in 100 nanoseconds at a 20 MHz external clock and integrates 3 KB of OTP program memory (2K x 12 words), 72 bytes of data RAM, and 20 digital I/O pins. The device uses a 12-bit wide instruction word and an 8-bit data path, with 33 single-word instructions providing 2:1 code compression over competing 8-bit MCUs of its era. A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory, and peripherals onto one die, intended for embedded control tasks. Within the taxonomy, MCUs sit under microcontrollers -> 8-bit microcontrollers -> general-purpose embedded controllers -> semiconductor ICs. The PIC16C5X family pioneered Microchip's RISC-style instruction set and remains popular for cost-sensitive, deterministic bit-manipulation applications where code density and low part count matter more than raw throughput. Key features of the PIC16C57C-20/SP include a two-level deep hardware stack, direct/indirect/relative addressing modes for both data and instructions, an 8-bit real-time clock/counter (TMR0) with programmable prescaler, and a watchdog timer for unattended operation. Operating supply voltage spans 4.5 V to 5.5 V (commercial 0 C to +70 C range for the -20/SP speed grade), and I/O pins can source/sink 20 mA for direct LED or relay drive. The OTP memory allows one-time field programming, making this part well suited for low-to-medium volume production. Typical applications include automotive body controllers, industrial appliance control, security panels, and remote sensor transmitters where the deterministic 100 ns instruction cycle and 33-instruction RISC core simplify firmware while keeping BOM cost minimal. The 28-pin SPDIP footprint is breadboard-friendly and supports hand-soldered prototyping as well as wave-soldered assembly. When designing with this part, note that OTP precludes firmware upgrades; budget development effort for ROM emulator (ICE) verification or sample-window pre-production testing. For designs needing in-system reprogrammability, prefer the flash-based PIC16F57 successor or the PIC16F628A family which drop into similar footprints. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.

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PIC16C57C-20E/SO - 8-Bit 20MHz OTP MCU 3KB | Microchip
PIC16C57C-20E/SO

PIC16C57C-20E/SO - 8-Bit 20MHz OTP MCU 3KB | Microchip

The Microchip Technology PIC16C57C-20E/SO is a CMOS OTP-based 8-bit microcontroller from the PIC16C5X family, executing instructions in 200 ns (5 MHz oscillator) or 100 ns (20 MHz oscillator) per instruction cycle. It integrates 3KB (2K x 12) of One-Time-Programmable program memory, 72 bytes of RAM, and up to 20 digital I/O pins in a 28-pin SOIC (7.50 mm / 0.295 inch) wide-body package. The device is rated for industrial extended temperature operation (-40C to +125C) and operates from 3.0 V to 5.5 V supply. An OTP (One-Time-Programmable) microcontroller is a class of non-volatile programmable logic device that uses EPROM cells to store firmware; unlike flash-based MCUs, OTP memory cannot be electrically erased and is intended for volume production where code is finalized. The PIC16C57C belongs to the baseline PIC architecture (RISC, 33 single-word instructions, 12-bit instruction word) and slots below PIC16F and PIC18 enhanced families. In the broader taxonomy it is an 8-bit microcontroller -> embedded MCU -> semiconductor IC, historically used in low-cost, high-volume appliance, automotive, and industrial control applications. Key features include 20 MHz maximum operating frequency, 20-bit instruction word with 2:1 code compression versus competing 8-bit MCUs, hardware watchdog timer, power-on reset, brown-out detection, and programmable code protection. The CMOS design draws only 2 mA typical at 5V/20 MHz and supports standby current down to 1 uA. The PIC16C57C uses a Harvard architecture with separate program and data buses, enabling single-cycle instruction fetch and execution. Its 12-bit-wide instruction set is symmetric and orthogonal, simplifying assembly coding. The RISC core delivers approximately 5 MIPS peak throughput at 20 MHz - an order-of-magnitude advantage over contemporaries in its price class. Typical applications include automotive body controllers, industrial timers and counters, appliance control boards, security keypads, low-end sensor readers, and remote-control transmitters. The wide operating voltage and temperature make it suitable for harsh environments. When designing with the PIC16C57C-20E/SO, account for the OTP constraint: firmware must be fully verified before programming, as there is no in-circuit erase. Use the extended-temperature E suffix for industrial deployments; for commercial-grade deployments the PIC16C57C-20/SO (non-E) is acceptable. Programming requires Microchip-compatible device programmers supporting the PIC16C5X family. This page consolidates distributor pricing, pin-compatible drop-in alternatives, application guidance, and package information for engineers evaluating or sourcing the PIC16C57C-20E/SO. All data cross-referenced against Microchip's PIC16C5X datasheet and current distributor inventory.

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PIC16C57C-20E/SP - 8-Bit 20MHz OTP MCU, 28-SPDIP | Microchip
PIC16C57C-20E/SP

PIC16C57C-20E/SP - 8-Bit 20MHz OTP MCU, 28-SPDIP | Microchip

The Microchip Technology PIC16C57C-20E/SP is a member of the PIC16C5X family of low-cost, high-performance 8-bit CMOS EPROM/ROM-based microcontrollers delivering 20 MHz maximum operating frequency with 100 ns instruction execution in a 28-pin SPDIP (SPD) through-hole package. It integrates 3 KB (2K x 12) of one-time-programmable (OTP) program memory, 72 bytes of RAM, and 33 single-word instructions in a RISC architecture optimized for compact code density. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, data RAM, and I/O peripherals on a single die. The PIC16C5X family belongs to the broader PIC® architecture -> 8-bit microcontroller -> microcontroller -> embedded controller -> semiconductor device hierarchy. OTP-based PIC devices occupy a specific niche in this taxonomy: they are mask-ROM-equivalent in pinout and firmware behavior, but the program memory can be written once by the user with a standard programmer, making them ideal for low-volume production, prototype runs, and legacy field replacements. Key features include 20 MHz maximum clock, 4 oscillator selections (RC, LP, XT, HS), 20 I/O pins, an 8-bit timer/counter, watchdog timer with on-chip RC oscillator, power-on reset, power-saving SLEEP mode, code protection, and 4.5V to 5.5V operating voltage. The '20E' suffix indicates 20 MHz speed grade with the extended (-40C to +125C) automotive temperature range, while the /SP suffix denotes the 28-pin 0.300-inch Skinny Plastic DIP package supplied in tube. The PIC16C5X employs a Harvard architecture with separate program and data buses, a 12-bit-wide instruction word, and a 2-level deep hardware stack. Compared to 8-bit CISC competitors in its era, this delivers roughly 2:1 code compression, allowing more application functionality within the limited 2K-word OTP. The device is fully static, supporting operation below 20 MHz down to DC, and includes on-chip brown-out and power-on reset circuitry for robust cold-start behavior in industrial environments. Typical applications include automotive subsystems (sensor interfaces, simple control loops), industrial appliance control (washing machines, HVAC damper drivers), security and alarm panels, remote transmitters, low-end consumer electronics, and any field-replacement scenario where the original OTP code must be replicated exactly. The wide temperature range makes the -20E grade especially suited for under-hood automotive and outdoor industrial installations. When designing with this device, ensure the chosen oscillator mode matches the external crystal or resonator network; an HS-mode crystal with improper load capacitance can cause intermittent startup failures. Note that OTP memory cannot be erased - for in-system reprogrammability, migrate to the flash-based PIC16F57 drop-in equivalent. Always place a 0.1 uF decoupling capacitor within 5 mm of VDD with a short trace to ground. This page synthesizes distributor pricing, automotive-grade temperature range, drop-in PIC16F57 alternatives, and practical design notes not found in the manufacturer datasheet.

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PIC16C57C-20E/SS - 8-bit OTP MCU, 3KB EPROM, 20MHz | Microchip
PIC16C57C-20E/SS

PIC16C57C-20E/SS - 8-bit OTP MCU, 3KB EPROM, 20MHz | Microchip

The Microchip Technology PIC16C57C-20E/SS is an EPROM/ROM-based 8-bit CMOS microcontroller from the PIC16C5X family, delivering 100 ns instruction execution with only 33 single-word instructions in a 28-pin SSOP package. It integrates 3 KB of OTP program memory, 72 bytes of RAM, and 20 digital I/O pins, runs at a maximum 20 MHz clock (the "-20" speed grade), and operates from a 4.5 V to 5.5 V supply. What is a PIC16C5X microcontroller? The PIC16C5X is a family of low-cost, high-performance, 8-bit fully static EPROM/ROM-based CMOS microcontrollers from Microchip Technology that introduced the PIC RISC architecture to a broad base of 8-bit embedded designs. These parts belong to the broader hierarchy: microcontroller -> embedded MCU -> 8-bit MCU -> CMOS MCU -> RISC MCU -> semiconductor IC. They target applications that need deterministic, simple instruction flow rather than the largest memory map, and they predate the PIC16F flash family while remaining software and pin-compatible with later PIC16F5X replacements. Key features include a 12-bit wide instruction set that achieves 2:1 code compression versus other 8-bit microcontrollers in its class, a hardware watchdog timer, power-on reset, and a brown-out reset block, plus an 8-bit real-time clock/counter. The device is specified for the extended automotive temperature range (-40C to +125C), as indicated by the "E" designator, and ships in a 28-pin SSOP (5.30 mm body) gull-wing surface-mount package. The "C" suffix marks the CMOS "C" revision with the higher 20 MHz ceiling. Architecturally, the PIC16C57C uses a Harvard-style separate code and data path, a 2-level deep hardware stack, and direct/indirect addressing modes for all 80 general-purpose registers. The OTP EPROM lets engineers code-protect each address location individually, which is a benefit over mask-ROM parts for low-volume and field-updateable products. Typical applications include automotive body and chassis controllers, industrial sensor interfaces, low-cost consumer appliances, security and access-control panels, and any 5V logic replacement board where legacy PIC code is being re-used on a modern PCB. When designing with the PIC16C57C, allocate the 2-level hardware stack carefully because it limits interrupt-less call depth, and place a 0.1 uF decoupling capacitor within 5 mm of each VDD pin. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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PIC16C57C-20I/P - 8-bit 20MHz OTP MCU 3KB | Microchip
PIC16C57C-20I/P

PIC16C57C-20I/P - 8-bit 20MHz OTP MCU 3KB | Microchip

The Microchip Technology PIC16C57C-20I/P is an 8-bit RISC CMOS OTP microcontroller delivering up to 20 MHz maximum clock speed in a 28-pin PDIP (Plastic Dual-In-Line) through-hole package. It integrates 3KB (2K x 12) of One-Time-Programmable (OTP) program memory and 72 bytes of general-purpose SRAM, with 20 digital I/O pins. The "I" suffix denotes the industrial temperature grade of -40C to +85C, while "-20" specifies the 20 MHz maximum operating frequency and "/P" denotes the PDIP package. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (ROM/Flash/OTP), data RAM, and programmable I/O peripherals. The PIC16C5X family belongs to the broader 8-bit MCU category, which sits beneath 16-bit and 32-bit MCUs in the embedded computing hierarchy. 8-bit OTP MCUs like the PIC16C57C are designed for cost-sensitive, high-volume embedded control where code is finalized at production time and does not require field updates - common in appliances, toys, and industrial sensor nodes. Key features include a 12-bit instruction word for 2:1 code compression versus competing 8-bit architectures, only 33 single-word instructions for fast learning curve, 100 ns instruction execution time at 20 MHz, and a two-stack hardware subroutine return stack. The device supports both RC and crystal/ceramic resonator oscillator modes, watchdog timer with on-chip RC oscillator, and programmable code protection. The PIC16C57C uses a Harvard architecture with separate program and data buses, eliminating fetch-decode bottlenecks. Its 12-bit wide instruction set is symmetrical and orthogonal, allowing any register to act as an accumulator or address pointer. Power-on Reset (POR), Power-up Timer (PWRT), and Oscillator Start-up Timer (OST) ensure clean cold-start behavior without external reset circuitry. Typical applications include appliance control (washing machines, microwaves), automotive sub-systems (sensor interfaces, simple body controllers), industrial timers and counters, remote controls, and battery-powered sensor nodes. The 20 I/O lines comfortably drive LED arrays, keypads, and low-speed serial interfaces. When designing, allow for OTP one-time programming by using a production programmer and plan code carefully - there is no in-system reprogramming. Use the watchdog timer for unattended industrial deployments and follow Microchip's recommended decoupling (0.1 uF ceramic on VDD) plus bulk electrolytic on the board supply rail. This page synthesizes distributor pricing, verified drop-in alternatives from the same PIC16C5X family, and practical design notes not aggregated in any single manufacturer page, giving procurement and design engineers a faster path to sourcing and migrating legacy 8-bit designs.

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PIC16C57C-20I/SO - 8-Bit 20MHz OTP MCU 3KB | Microchip
PIC16C57C-20I/SO

PIC16C57C-20I/SO - 8-Bit 20MHz OTP MCU 3KB | Microchip

The Microchip Technology PIC16C57C-20I/SO is an 8-bit CMOS OTP (One-Time-Programmable) microcontroller in the PIC16C5X family, delivering 20 MHz CPU performance with 100 ns instruction execution in a 28-pin SOIC package. It integrates 3 KB (2K x 12) of OTP program memory, 72 bytes of RAM, and 20 digital I/O lines, all rated for industrial temperature operation (-40C to +85C). An 8-bit OTP microcontroller is a single-chip computer whose program memory is a one-time-programmable EPROM-style array - the device is programmed once at production and cannot be re-flashed, which makes it cost-optimized for high-volume embedded products that do not need firmware updates in the field. Within the broader taxonomy, the PIC16C57C belongs to the microcontroller (MCU) family, then 8-bit MCUs, then the PIC architecture lineage, then power management and digital control ICs, then semiconductors. It targets applications where predictable cost, simple programming model, and proven RISC performance outweigh the need for in-system reprogrammability. Key features include a Harvard RISC architecture with only 33 single-word instructions, a two-level deep hardware stack, and seven or eight special-function hardware registers. Peripherals include an 8-bit real-time clock/counter (TMR0), a watchdog timer, and direct, indirect, and relative addressing modes. The 20 MHz oscillator supports instruction cycles as fast as 200 ns in the -20 speed grade. The PIC16C57C uses a 12-bit instruction word with an 8-bit data path, yielding 2:1 code compression versus competing 8-bit MCUs of its era. Its fully static CMOS design minimizes power consumption, and the SOIC-28 footprint provides drop-in compatibility with other PIC16C5X family members (PIC16C54/55/56/57). The 'C' suffix denotes an enhanced silicon revision with improved electrical characteristics. Typical applications include automotive body controllers, industrial appliance controls, low-end consumer electronics, sensor interfaces, and battery-powered smart devices. It is also commonly deployed in replacement designs for legacy PIC16C5X systems where proven OTP architecture and broad second-source availability matter. When designing with this MCU, allocate the WDT, reset, and I/O pin budgets early - the PIC16C57C has a fixed 20 I/O count with no remapping. Engineers migrating to flash should evaluate the pin-compatible PIC16F57 family as a one-to-one drop-in. This page consolidates distributor pricing, drop-in same-package alternatives, application context, and practical design guidance not bundled in the manufacturer datasheet.

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PIC16C57C-20I/SP - 8-bit 20MHz OTP MCU, 3KB | Microchip
PIC16C57C-20I/SP

PIC16C57C-20I/SP - 8-bit 20MHz OTP MCU, 3KB | Microchip

The Microchip Technology PIC16C57C-20I/SP is an 8-bit CMOS OTP-based microcontroller built on the PIC16C5X family architecture, delivering 20MHz (200ns instruction cycle) performance in a 28-pin SPDIP through-hole form factor. Per the Microchip PIC16C57C datasheet, this industrial-temperature (-40C to +85C) device integrates 3KB (2K x 12) of one-time-programmable program memory, 72 bytes of RAM, and a 2-level hardware stack for compact embedded designs. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, memory, and peripherals on one silicon die. The PIC16C5X architecture is a RISC-style Harvard design with 33 single-word instructions, 12-bit-wide opcodes, and 8-bit-wide data paths. This results in roughly 2:1 code compression versus typical 8-bit CISC competitors in the same price class. The device sits within the broader microcontroller -> embedded MCU -> semiconductor taxonomy, and the OTP variant is intended for low-to-medium-volume production where in-system reprogrammability is not required. Key features include 20 I/O pins, an 8-bit real-time clock/counter (TMR0) with programmable prescaler, direct/indirect/relative addressing modes, seven or eight special function hardware registers, and a power-on reset (POR) circuit. The wide 2.7V-5.5V VDD range and low-power CMOS process make the part well-suited to battery-influenced and industrial applications. The 28-pin SPDIP package is the industry-standard through-hole profile that simplifies prototyping on breadboards and through-hole production boards. In depth, the PIC16C57C uses a 12-bit program-word, 8-bit data-path, 2-level-deep hardware stack that limits call depth (no nested interrupts by default). It supports 4 oscillator modes (RC, LP, XT, HS), allowing designers to trade cost vs frequency. Watchdog timer, power-saving SLEEP mode, and programmable code protection round out the feature set. The -20 speed grade variant guarantees 20MHz operation over the full industrial temperature range, whereas slower -04 and -10 grades are typically used for cost-sensitive designs. Typical applications include industrial control, automotive subsystems (post-screening by customer), appliance control, low-end consumer electronics, security alarm panels, and legacy replacement designs. The 8-bit PIC16C5X core remains popular in cost-sensitive, deterministic real-time control where interrupt latency predictability is more important than raw throughput. When designing with this part, note that OTP means firmware is committed at the time of programming and cannot be field-updated. Use the JW windowed package for prototype iteration, and consider a Flash-based PIC16F equivalent (e.g. PIC16F57) if in-application reprogrammability is needed. This page consolidates distributor pricing, parametric drop-in alternatives within the PIC16C5X family, and practical design notes not collected in any single manufacturer document.

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PIC16C57C-20I/SS - 8-Bit 20MHz 3KB OTP MCU | Microchip
PIC16C57C-20I/SS

PIC16C57C-20I/SS - 8-Bit 20MHz 3KB OTP MCU | Microchip

The Microchip Technology PIC16C57C-20I/SS is an 8-bit RISC CMOS microcontroller with 20 MHz maximum clock, 3 KB (2K x 12) of One-Time-Programmable (OTP) program memory, 72 bytes of RAM, and 20 digital I/O pins, housed in a 28-pin SSOP (Shrink Small Outline Package). It executes one instruction every 200 ns (5 MIPS) and features a 12-bit wide instruction word with 8-bit data path, a two-level deep hardware stack, and a single 8-bit timer/counter (TMR0). An 8-bit OTP microcontroller is a programmable logic device that stores its application code in non-volatile One-Time-Programmable memory instead of flash; once programmed, the code cannot be rewritten. The PIC16C57C belongs to the PIC16C5X family, which sits within Microchip's classic PIC mid-range 8-bit microcontroller taxonomy (8-bit MCU -> RISC microcontroller -> embedded controller -> semiconductor). This 5X family was the original low-cost, high-performance PIC architecture that established Microchip in the 8-bit MCU market. Key features include 33 single-word instructions for easy programming, direct/indirect/relative addressing modes for both data and instructions, 8-bit real-time clock/counter (TMR0) with 8-bit prescaler, power-on reset, watchdog timer for reliable operation, and code protection to safeguard intellectual property. The C-grade silicon revision also adds improved oscillator tolerance and lower power consumption versus the original PIC16C57A baseline. Architecturally, the PIC16C57C uses a Harvard-style RISC core with separate program and data buses, enabling simultaneous instruction fetch and operand access. The OTP EPROM cell is fabricated in CMOS for low static current draw, while the 12-bit instruction width gives 2:1 code compression versus competing 8-bit MCUs that use 16-bit instruction words. Industrial temperature grade (-40C to +85C) ensures operation in harsh environments. Typical applications include automotive body electronics, industrial control systems, appliance controls, security and alarm panels, simple sensor interfaces, and consumer products. The 20 I/O pins make it suitable for keypad scanning, LED driving, and relay control. With its 100 ns instruction execution time, it offers an order-of-magnitude higher performance than competitors in the same price category. When designing with the PIC16C57C-20I/SS, remember that OTP memory requires programming before insertion; design for programming socket access or in-circuit programming. The 28-SSOP package is suitable for space-constrained applications. Use the watchdog timer to recover from software lockups, and apply proper decoupling (0.1 uF ceramic) near VDD to suppress switching noise. This page synthesizes distributor pricing, drop-in OTP variants, and practical design notes that go beyond the manufacturer datasheet, giving engineers a one-stop reference for sourcing and integrating the PIC16C57C-20I/SS.

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PIC16C57C-40/P - 8-Bit OTP MCU, 2KB EPROM, 40MHz, 28-DIP | Microchip
PIC16C57C-40/P

PIC16C57C-40/P - 8-Bit OTP MCU, 2KB EPROM, 40MHz, 28-DIP | Microchip

The Microchip Technology PIC16C57C-40/P is a CMOS OTP-based 8-bit microcontroller from the PIC16C5X family, delivering 100 nanosecond instruction execution at 40 MHz, packaged in a 28-pin PDIP (DIP-28) through-hole form factor. It integrates 2KB (2K x 12) of one-time-programmable EPROM program memory, 72 bytes of RAM, and 20 I/O pins arranged across multiple ports (RA, RB, RC). The device operates from 3.0V to 5.5V and is offered in a -40C to +85C industrial temperature grade. A PIC microcontroller is an 8-bit RISC-based Harvard-architecture MCU that uses separate program and data buses, allowing instruction fetch and operand access to occur in the same clock cycle. The PIC16C5X series is the entry-tier of Microchip's original PIC portfolio and sits in the broader taxonomy: 8-bit microcontroller -> RISC microcontroller -> microcontroller -> embedded processor -> semiconductor. Its 33 single-word, single-cycle instruction set makes it simple to program in assembly while keeping code density exceptionally high thanks to the 12-bit-wide instruction word. Key features of the PIC16C57C-40/P include a programmable 8-bit timer/counter (TMR0) with an 8-bit prescaler, watchdog timer with its own on-chip RC oscillator for reliable resets, power-on reset, brown-out detection, and a four-stage instruction pipelining engine. The 40 MHz internal clock (10 MHz external oscillator with 4x PLL multiplier) yields 100 ns instruction cycle time, enabling tight deterministic control loops for cost-sensitive real-time applications. The PIC16C57C architecture uses a 12-bit program counter and dedicated W (working) register, with file registers organized into two banks. The OTP EPROM allows field programming of code via standard Microchip programmers such as the PICSTART Plus or PRO MATE II, supporting in-house development cycles for low-to-medium volume products. Its CMOS process keeps supply current low, extending battery life in portable or always-on designs. Typical applications include appliance control, automotive body electronics, low-end remote keyless entry, security keypads, sensor interface modules, and small industrial controllers. Because the program memory is OTP rather than flash, the PIC16C57C is best suited for high-volume mature products where code is finalized and field re-programming is not required. For new designs requiring flash reprogrammability, the PIC16F57 or PIC16F59 family is the recommended modern equivalent. When designing with the PIC16C57C-40/P, place a 0.1 uF decoupling capacitor as close as possible to VDD (pin 28) and a bulk 10 uF tantalum or aluminum electrolytic on the same node. A series resistor (typically 4.7 kohm to 10 kohm) on MCLR allows in-circuit serial programming while preventing unintended resets. Unused I/O pins should be configured as outputs and tied low to minimize current consumption. This page synthesizes distributor pricing, drop-in alternatives from Microchip's own PIC16C5X family, and practical design notes not found in the manufacturer datasheet alone.

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PIC16C57C-40/SO - 8-bit OTP MCU, 3KB EPROM, 28-SOIC | Microchip
PIC16C57C-40/SO

PIC16C57C-40/SO - 8-bit OTP MCU, 3KB EPROM, 28-SOIC | Microchip

The Microchip Technology PIC16C57C-40/SO is a CMOS OTP-based 8-bit RISC microcontroller delivering 100 ns instruction execution in a 28-pin SOIC wide-body package. It integrates 3KB of one-time-programmable EPROM program memory, 72 bytes of RAM, and 20 digital I/O lines, executing code from a 12-bit-wide instruction set of 33 single-word instructions. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, non-volatile program memory, working RAM, and peripherals on one die. The PIC16C57C belongs to the PIC16C5X baseline family, sitting in the broader hierarchy of microcontroller -> embedded processor -> digital IC -> semiconductor. This category is designed for deterministic, low-cost, low-power control tasks where an entire system can be implemented with one chip plus passives. Key features include a 40 MHz maximum oscillator input (giving 100 ns instruction cycle), 2K x 12-bit program word organization, 8-bit timer/counter with 8-bit prescaler, watchdog timer with dedicated on-chip RC oscillator, power-on reset, and a wide 2.5V to 6.0V operating range. The C-grade device is specified for the commercial 0C to +70C temperature range. A 12-bit instruction word yields roughly 2:1 code compression over competing 8-bit MCUs, which lowers ROM usage in code-dense applications. Architecturally, the PIC16C57C uses a Harvard-style separate program/data bus, single accumulator W register, and two-level hardware stack. Its CMOS OTP process delivers low operating current (typically <2 mA at 5V/4 MHz, <30 uA standby) and the device is also available in windowed ceramic EPROM and QTP/SQTP programming options for prototyping. Unlike modern Flash PIC16F parts, the 'C' suffix denotes OTP, so code is locked at production programming. Typical applications include appliance controllers, automotive subsystems (non-safety), industrial control logic, low-end user-interface boards, and remote sensor transmitters. The 20 I/O pins and 33-instruction RISC core make it well suited to replace discrete logic and small gate arrays. When designing with the PIC16C57C-40/SO, note that OTP devices cannot be reprogrammed in-circuit; allocate engineering time to verify firmware on a windowed or flash equivalent before committing to OTP. Always place a 0.1 uF decoupling capacitor within 5 mm of VDD, and keep the OSC1/OSC2 trace lengths matched when using a crystal. This page consolidates distributor pricing, pin-compatible drop-in alternatives, and practical design notes beyond what is found in the manufacturer datasheet.

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PIC16C57C-40/SP - 8-bit OTP MCU 2KB EPROM 20MHz DIP-28 | Microchip
PIC16C57C-40/SP

PIC16C57C-40/SP - 8-bit OTP MCU 2KB EPROM 20MHz DIP-28 | Microchip

The Microchip Technology PIC16C57C-40/SP is a CMOS OTP-based 8-bit RISC microcontroller in a 28-pin SPDIP (Skinny Plastic DIP) through-hole package, executing instructions in 100 ns at a 40 MHz oscillator input. It packs 2 KB of one-time-programmable EPROM program memory, 72 bytes of RAM, and 20 digital I/O pins, making it a compact workhorse for legacy embedded designs. The part operates from a 3.0 V to 5.5 V supply and features 33 single-word instructions, brown-out detection, a watchdog timer, and a power-on reset circuit. A PIC microcontroller is a Harvard-architecture 8-bit MCU family from Microchip that pairs a separate program and data bus with a streamlined RISC instruction set, allowing deterministic single-cycle execution of most opcodes. The PIC16C5x sits at the entry tier of this family with OTP EPROM rather than flash, which means firmware is committed at programming time and cannot be erased electrically - an advantage for security-sensitive or low-cost production where re-programmability is not required. This part category is positioned under 8-bit microcontrollers within the broader microcontroller IC hierarchy. Key features of the PIC16C57C-40/SP include 2K x 12-bit word program memory (2 KB EPROM), 72 x 8 RAM, 20 I/O, a 3.0-5.5 V operating range, 12-bit wide instructions, an 8-bit timer/counter with prescaler, and power-saving SLEEP mode. The 'C' suffix denotes the CMOS low-power revision with improved brown-out and watchdog specifications versus earlier PIC16C5x die. Typical applications include industrial control replacement boards, automotive body controllers, appliance controls, simple sensor interfaces, and remote sensor transmitters where the OTP memory and DIP-28 form factor remain desired. The 40 MHz rating supports a 100 ns instruction cycle, enabling timing-sensitive loops without wait states. When designing, remember that OTP parts require verified firmware before programming because there is no in-circuit erase path - and DIP-28 footprint remains compatible with legacy hand-soldered and socketed boards long after flash-based successors were introduced.

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PIC16C57C/JW - 8-bit 20MHz EPROM MCU, 3KB, 28-CDIP Window | Microchip
PIC16C57C/JW

PIC16C57C/JW - 8-bit 20MHz EPROM MCU, 3KB, 28-CDIP Window | Microchip

The Microchip Technology PIC16C57C/JW is a CMOS OTP-based 8-bit microcontroller from the PIC® 16C family, packaged in a 28-pin Ceramic DIP (CDIP) with an erasable UV window, operating at up to 20 MHz instruction rate. According to the Microchip product page, it integrates 3 KB of program memory (2K × 12 EPROM), 72 bytes of RAM, and 20 digital I/O pins, executing each instruction in 100 ns using only 33 single-word instructions. An 8-bit microcontroller (MCU) is a single-chip computer that combines a CPU, RAM, non-volatile program memory, and peripheral I/O on one die. The PIC® 16C family sits within Microchip's mid-range PIC architecture hierarchy: PIC® 8-bit MCU -> microcontroller -> embedded processor -> semiconductor. These MCUs are widely used as state machines, glue logic, and simple control cores where deterministic instruction timing and minimal external parts matter more than raw throughput. The PIC16C57C delivers an instruction cycle of 200 ns (one fetch, one execute) from a 20 MHz oscillator, supports a 2-level hardware stack, and offers programmable I/O ports (PORTA/B/C) with individual direction control. Watchdog timer with on-chip RC oscillator and Power-on Reset reduce external component count. A power-saving SLEEP mode and selectable oscillator options (RC, XT, LP, HS) provide flexibility across 2.0 V to 6.0 V operation. The architecture is a RISC-style Harvard design with separate 12-bit program and 8-bit data paths. Code is stored in UV-erasable EPROM (the /JW windowed package allows re-programming after erasing with ultraviolet light, distinguishing it from one-time-programmable /P and /SP plastic DIP variants). CMOS process technology keeps supply current low even at full clock speed, making it suitable for battery and industrial applications. Typical applications include automotive body electronics, industrial control logic, remote sensor interfaces, and legacy embedded systems. Engineers migrating older PIC16C5x designs often retain the PIC16C57C/JW in production because the JW windowed package allows iterative firmware development with UV erase, unlike OTP variants. When designing with this device, note that the 28-CDIP (JW) windowed package is intended for prototyping and engineering samples; for production runs, consider the /P (plastic DIP) or /SP (skinny plastic DIP) OTP variants. The UV window requires a quartz window cover, and erasure requires approximately 20 minutes of UV exposure at the recommended intensity.

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PIC16C57CT-04/SS - 8-bit PIC MCU, 4MHz, 3KB OTP, 28-SSOP
PIC16C57CT-04/SS

PIC16C57CT-04/SS - 8-bit PIC MCU, 4MHz, 3KB OTP, 28-SSOP

The Microchip Technology PIC16C57CT-04/SS is an 8-bit CMOS OTP-based PIC16C microcontroller running at 4MHz instruction frequency, packaged in a 28-pin SSOP (0.209", 5.30mm width) surface-mount form factor. The device integrates 3KB (2K x 12) of one-time-programmable program memory, 72 bytes of data RAM, and 20 digital I/O pins, operating from a 3V to 5.5V supply. The "CT" tape-and-reel suffix and "04" speed grade indicate the 4MHz commercial-temperature variant supplied on reel. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, data RAM, and peripheral I/O on one die, intended for embedded control tasks. Within the semiconductor hierarchy, MCUs belong to the broader family of microcontrollers and embedded processors, sitting below microprocessors in complexity but above simple logic ICs in capability. The PIC16C5X family in particular uses a 12-bit-wide instruction set with a RISC architecture, delivering 2:1 code compression versus competing 8-bit MCUs in the same price class. The "C" suffix indicates CMOS technology with OTP program memory. Key features of the PIC16C57CT-04/SS include a Harvard RISC CPU with 33 single-word instructions, Power-on Reset (POR), a Watchdog Timer (WDT) for reliable operation in noisy environments, and an external oscillator interface supporting RC, XT, LP, and HS modes. The 20 I/O pins can source/sink digital signals for buttons, relays, displays, and discrete logic interfaces. The 4MHz maximum instruction rate yields a 250ns instruction cycle, sufficient for slow-loop control and human-interface timing. Architecturally, the device uses a Harvard memory layout with separate program and data buses, eliminating the need for an instruction prefetch queue. The 12-bit instruction word reduces code density overhead, while the two-stage pipeline overlaps fetch and execute for consistent throughput. Internal peripherals are kept simple: two timers, a watchdog, and an 8-bit prescaler shared with Timer0. Typical applications include industrial control subsystems, consumer appliances, low-cost automotive body electronics, hobbyist projects, and replacement of discrete logic with programmable control. With 20 I/O, 72 bytes RAM, and 3KB OTP, the device fits applications where deterministic bit-level I/O handling matters more than arithmetic throughput, such as keypad scanners, LED multiplexers, and simple sensor conditioning. A key design consideration: because PIC16C57C is OTP (one-time programmable), field firmware updates are impossible - choose this family only when the firmware is final. For in-application reprogrammability, designers should migrate to the flash-based PIC16F57 family instead. This page consolidates distributor pricing, drop-in same-package alternatives, and engineering design notes not found in the manufacturer datasheet alone, giving procurement and design engineers a single reference for evaluating the PIC16C57CT-04/SS.

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PIC16C57CT-04E/SO - 8-Bit 4MHz OTP MCU 3KB 28-SOIC | Microchip
PIC16C57CT-04E/SO

PIC16C57CT-04E/SO - 8-Bit 4MHz OTP MCU 3KB 28-SOIC | Microchip

The Microchip Technology PIC16C57CT-04E/SO is an 8-bit CMOS microcontroller from the PIC16C5X family, featuring 3KB (2K x 12) of One-Time Programmable (OTP) program memory and 72 bytes of RAM in a 28-pin SOIC wide-body package. It operates at a maximum clock speed of 4 MHz with a 100 ns instruction cycle, executes 33 single-word RISC instructions, and supports up to 20 digital I/O pins. An 8-bit microcontroller (MCU) is a small computing-on-a-chip that integrates a CPU, RAM, program memory, and peripherals into a single package. Within the taxonomy, it sits under microcontroller -> embedded processor -> semiconductor device. The PIC architecture uses a Harvard design with separate program and data buses, a 12-bit-wide instruction word, and a fixed-length instruction set that delivers roughly 2:1 code density over typical 8-bit CISC MCUs of its era. PIC16C5X parts were introduced as low-cost, high-volume OTP microcontrollers for appliances, automotive subsystems, and industrial control. Key features include 3KB OTP program memory (2K x 12 organization), 72 bytes of general-purpose RAM, 20 digital I/O lines arranged in three ports (RA, RB, RC), two 8-bit timers (TMR0 and TMR2), a Watchdog Timer with on-chip RC oscillator, Power-on Reset, Brown-out Reset, and an internal 4 MHz RC oscillator option. The device operates from 3.0 V to 6.0 V and is offered in commercial and industrial temperature grades. Architecturally, the PIC16C57C uses a RISC-style 12-bit instruction word with a two-stage pipeline, a single accumulator (W register) plus 32 general-purpose file registers, and CMOS EPROM/OTP program memory. Power-down (SLEEP) mode drops quiescent current below 1 µA typical, making it attractive for battery-backed designs. The PIC16C5X delivers an instruction execution time of 100 ns at 4 MHz, with most instructions completing in a single cycle. Typical applications include white-goods and appliance control, automotive body modules (cluster, lighting), industrial control timers, security and alarm panels, sensor signal conditioning, and low-cost consumer remote controls. The 28-SOIC wide-body package and 4 MHz clock are well suited to designs that need moderate compute, low cost, and surface-mount assembly. Designers should note that PIC16C5X code written for the PIC16C57 will not directly run on PIC16C55 or PIC16C56 (different memory maps and pinouts) and that the OTP program memory cannot be erased, so firmware must be validated on a windowed PIC16C57/JW or a compatible flash device such as PIC16F57 before production programming. This page synthesizes distributor pricing for the PIC16C57CT-04E/SO, drop-in PIC16C5X alternatives in the same 28-SOIC footprint, and design notes not found in the Microchip datasheet.

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