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PIC16C57CT-04I/SO - 4MHz 8-Bit OTP MCU, 3KB, 20 I/O | Microchip
PIC16C57CT-04I/SO

PIC16C57CT-04I/SO - 4MHz 8-Bit OTP MCU, 3KB, 20 I/O | Microchip

The Microchip Technology PIC16C57CT-04I/SO is an 8-bit CMOS OTP-based microcontroller from the PIC16C5X family, delivering 4 MHz instruction execution with 100 ns instruction cycle time in a 28-pin SOIC package. It integrates 3 KB (2K x 12) of one-time-programmable program memory, 72 bytes of RAM, and 20 digital I/O pins, making it a cost-effective solution for embedded control. The "C" suffix denotes the CMOS EPROM/OTP variant of the original PIC16C57 family, while the "T" tape-and-reel suffix, "-04" 4 MHz speed grade, and "I" industrial temperature range (-40C to +85C) are reflected in the part number. A PIC16C5X microcontroller is an 8-bit fully-static CMOS RISC architecture device designed for low-cost, high-performance embedded control. Within the broader semiconductor taxonomy it sits as: 8-bit microcontroller -> microcontroller -> embedded processor -> semiconductor IC. The PIC16C5X core is Harvard-architecture with 12-bit-wide instructions, providing 2:1 code compression over comparable 8-bit CISC controllers in the same price class. With only 33 single-word instructions, programming complexity is minimal and code density is high, which lowers BOM cost in volume production. Key features of the PIC16C57CT-04I/SO include a 4 MHz maximum clock, 100 ns instruction execution, 3 KB (2K x 12) OTP program memory, 72 bytes of general-purpose RAM, a reset input, watchdog timer, and 20 bidirectional I/O pins. The 28-pin SOIC (SO) industrial package provides a surface-mount footprint compatible with hand-soldering and standard reflow profiles. Power consumption is low for an OTP CMOS MCU of its era, with the static core supporting fully static operation that allows the clock to be stopped without losing register state. Architecturally the PIC16C57CT uses a two-stage pipeline and a 12-bit program memory bus with an 8-bit data bus. Unlike later PIC16 mid-range parts, the PIC16C5X family does not feature interrupts, which simplifies real-time control loops because timing is fully deterministic from instruction counting. The OTP memory allows factory programming or one-time field programming via a device programmer, which is commonly used for low-volume production runs or end-of-line customization where mask-ROM volumes are uneconomical. Typical applications include appliance control, sensor signal conditioning, low-end consumer electronics, industrial timers and counters, automotive body controllers (legacy systems), simple LED driving, and remote-control transmitters. The 20 I/O pins and 33-instruction set enable direct interfacing to keypads, seven-segment displays, and discrete analog signals via simple RC networks. The wide industrial temperature range also supports outdoor or factory-floor deployments. When designing with the PIC16C57CT-04I/SO, plan the program memory as OTP - code must be 100% verified before programming because there is no in-circuit reprogramming. Use a Watchdog Timer to recover from brown-out events, add a decoupling capacitor of 0.1 uF close to VDD, and reserve an RC network on MCLR for clean reset behavior. The -04 speed grade means the oscillator must be selected to keep instruction execution within the 100 ns cycle budget at the chosen VDD. This page synthesizes distributor pricing, drop-in OTP and windowed EPROM alternatives in the same 28-SOIC footprint, and design notes not found in the manufacturer datasheet.

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PIC16C57CT-04I/SS - 8-bit CMOS MCU 3KB EPROM SSOP-28 | Microchip
PIC16C57CT-04I/SS

PIC16C57CT-04I/SS - 8-bit CMOS MCU 3KB EPROM SSOP-28 | Microchip

The Microchip PIC16C57CT-04I/SS is an 8-bit EPROM/ROM-based CMOS microcontroller from the PIC16C5X family, packaged in a 28-pin SSOP (Shrink Small Outline Package) supplied on Tape and Reel. It integrates 3 KB of OTP EPROM program memory, 72 bytes of RAM, and 20 general-purpose digital I/O pins, with a maximum clock frequency of 40 MHz and instruction execution as fast as 100 ns per single-word instruction. The device operates from a single 5 V supply across the industrial -40C to +85C temperature range. The PIC16C5X family of microcontrollers belongs to the broader category of 8-bit microcontrollers, which are single-chip microcomputing units integrating CPU, RAM, non-volatile program memory, and peripherals on one die. As a RISC architecture with only 33 single-word instructions, the PIC16C57CT-04I/SS uses a 12-bit wide instruction word that yields 2:1 code compression versus other 8-bit MCUs in its class, simplifying firmware development and shrinking code footprint. Key differentiating features include a Power-on Reset (POR) circuit, a Watchdog Timer (WDT) for unattended operation, a Timer0 peripheral, and an OTP (one-time-programmable) EPROM cell array that allows code customization for low- to medium-volume production. The CMOS process delivers low quiescent current suitable for power-conscious designs, and the fully static design permits clock-gating for energy saving. The SSOP-28 footprint provides 20 usable I/O lines in a compact 5.30 mm body. Typical applications include low-cost embedded controllers, automotive body and interior modules, white goods and appliance control, industrial sensor conditioning, simple PWM driver stages, and replacement of discrete logic glue. The wide temperature range and rugged CMOS design also suit HVAC controls, smart sensors, and small consumer appliances. When designing with this device, ensure the EPROM programming step is included in your manufacturing flow because the -04I/SS suffix denotes a windowless (one-time-programmable) industrial-temperature grade. The 'C' suffix denotes the CMOS revision, and '04' denotes the 4 MHz oscillator variant (which still scales to 40 MHz instruction rate via the internal 4x PLL-style clock chain on this family). This page synthesizes distributor pricing, parametric cross-references, and engineering design guidance that go beyond the manufacturer datasheet summary.

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PIC16C57CT-20/SO - 8-Bit 20MHz OTP MCU 28-SOIC | Microchip
PIC16C57CT-20/SO

PIC16C57CT-20/SO - 8-Bit 20MHz OTP MCU 28-SOIC | Microchip

The Microchip Technology PIC16C57CT-20/SO is an 8-bit RISC microcontroller from the PIC® 16C family, featuring a 20 MHz CPU, 3 KB (2K x 12) of One-Time-Programmable (OTP) program memory, 72 bytes of RAM, and 20 general-purpose I/O lines in a 28-pin SOIC (SO) package. The 'CT' suffix denotes the commercial temperature grade (0°C to +70°C), the '20' denotes 20 MHz maximum clock, and the 'SO' suffix indicates the 7.50 mm body-width Small-Outline IC package on tape and reel. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (ROM/EPROM/Flash/OTP), data memory (RAM), and peripheral functions such as timers, I/O ports, and reset circuitry. The PIC16C5X family from Microchip Technology is part of the foundational 8-bit PIC architecture lineage (PIC -> 8-bit MCU -> microcontroller -> embedded IC -> semiconductor), using a RISC instruction set with only 33 single-word instructions for simplified software development. The OTP memory is programmed once at production using a device programmer, suiting low-cost, fixed-function appliance and consumer applications where in-field firmware updates are unnecessary. Key features of the PIC16C57CT-20/SO include 100 ns instruction execution time (200 ns at 5V for two-cycle instructions), an operating voltage range of 3.0 V to 5.5 V, a Power-On Reset (POR) circuit, a Watchdog Timer (WDT) for reliable operation in noisy environments, and a 12-bit wide instruction word delivering 2:1 code compression over competing 8-bit MCUs in its class. The device consumes only a few milliamps during full-speed operation and supports low-power sleep mode for battery-friendly designs. Typical applications include consumer appliances, automotive body electronics, industrial control logic, security and alarm systems, IR remote controls, low-end toys, and replacement of discrete logic in cost-sensitive embedded systems. The wide 5 V tolerance also suits legacy 5 V-only peripherals common in PIC16C5X-era designs. When designing with this part, ensure the MCLR (master clear) reset pin has the proper pull-up configuration and that the oscillator selection matches the chosen crystal or RC network. For new designs, designers should evaluate modern PIC16F or PIC18 Flash-based equivalents for greater reprogrammability and active development support, as the PIC16C5X OTP family is mature technology.

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PIC16C57CT-20E/SS - 8-Bit OTP MCU, 20MHz, 3KB, 28-SSOP | Microchip
PIC16C57CT-20E/SS

PIC16C57CT-20E/SS - 8-Bit OTP MCU, 20MHz, 3KB, 28-SSOP | Microchip

The Microchip Technology PIC16C57CT-20E/SS is a member of the PIC16C5X family of 8-bit CMOS OTP microcontrollers, featuring a 20 MHz CPU, 3 KB (2K x 12) of One-Time-Programmable program memory, and 72 x 8 bytes of RAM, housed in a 28-pin SSOP package. It is specified for an extended industrial operating temperature range of -40C to +125C, denoted by the "E" suffix, and runs from a single 2.5 V to 6.25 V supply at 20 MHz. What is an 8-bit OTP microcontroller? An OTP microcontroller is a single-chip computer that integrates a CPU, non-volatile program memory that can be written exactly once, RAM, and peripherals. The PIC16C5X family sits within Microchip's PIC architecture hierarchy (8-bit PIC -> PIC16 -> PIC16C5X), which is part of the broader category of embedded microcontrollers and is widely used in cost-sensitive, low-power, deterministic control applications where reprogramming is unnecessary. Key features include a 12-bit instruction word, 33 single-word instructions, an 8-level hardware stack, a 33-byte common RAM area, and up to 20 digital I/O pins. The device provides two 8-bit timer/counters and a watchdog timer with on-chip RC oscillator, and uses a high-performance RISC-like architecture that delivers 100 ns instruction execution at 20 MHz. The "T" suffix denotes Tape and Reel packaging; "20" indicates the 20 MHz speed grade. Typical applications include appliance controllers, automotive body electronics, industrial sensor interfaces, low-end remote controls, and standalone logic-replacement modules. The extended temperature range makes it well-suited for under-hood and factory-floor environments. Compared with PIC16F flash parts in the same package, the OTP architecture keeps per-unit cost low for high-volume production runs. When designing with this device, allocate the OTP window correctly because the memory cannot be erased or rewritten. Plan oscillator and reset network values around the datasheet recommended ranges, and respect the 6.25 V absolute maximum on VDD to avoid latch-up. This page synthesizes distributor pricing, pin-to-pin alternatives, and design notes not found in the manufacturer datasheet.

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PIC16C57CT-20I/SO - 8-Bit 20MHz CMOS OTP MCU | Microchip | 28-SOIC
PIC16C57CT-20I/SO

PIC16C57CT-20I/SO - 8-Bit 20MHz CMOS OTP MCU | Microchip | 28-SOIC

The Microchip Technology PIC16C57CT-20I/SO is a member of the PIC16C5X family of low-cost, high-performance 8-bit fully-static EPROM/ROM-based CMOS microcontrollers, offering 2KB of program memory (3KB / 2Kx12 OTP/EPROM), 72 bytes of RAM, and 20 digital I/O pins in a 28-pin SOIC wide-body package with industrial temperature grade (-40C to +85C). It executes instructions at 100ns per instruction cycle using a 12-bit wide RISC instruction set, providing 2:1 code compression over competing 8-bit microcontrollers in the same price category. The device operates from 4.5V to 5.5V single supply at a maximum clock rate of 20 MHz. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, RAM, non-volatile program memory, and peripheral I/O. The PIC16C5X architecture specifically belongs to the PIC (Peripheral Interface Controller) family, characterized by Harvard architecture with separate program and data buses, RISC instruction sets, and OTP/EPROM program memory for low-cost, high-volume embedded designs. In the broader system hierarchy, MCUs sit below microprocessors (MPUs) and above discrete logic ICs in the embedded computing taxonomy, forming the backbone of consumer appliances, automotive subsystems, and industrial controllers where deterministic real-time response and minimal BOM cost are paramount. Key features of the PIC16C57CT-20I/SO include 33 single-word instructions, an 8-bit timer/counter, watchdog timer for code execution integrity, 20 bidirectional I/O pins capable of source/sink up to 25 mA per pin for direct LED drive, and a 12-bit instruction word that simplifies instruction decoding. The device also features a power-on reset (POR) circuit, brown-out detection, and a programmable code-protection mechanism to safeguard firmware IP. CMOS fabrication yields typical operating current under 2 mA at 5V/4 MHz and standby current below 1 uA, well-suited for battery-backed appliances. From an architectural perspective, the PIC16C5X implements a two-stage pipeline with single-cycle instruction fetch (except for program branches), allowing deterministic 100ns instruction execution at 20 MHz. The 8-level hardware stack and direct/indirect addressing modes simplify C and assembly firmware porting from earlier PIC16C5X designs. Program memory is one-time programmable (OTP) via EPROM cells, which historically offered faster prototyping than mask-ROM during low-volume product ramps. Typical applications for the PIC16C57CT-20I/SO include white-goods and appliance controllers, security keypads and alarm panels, automotive interior accessories (non-safety-critical), consumer IR remote controls, and industrial sensor interface modules. Its industrial temperature rating makes it appropriate for factory-floor sensor conditioning where consumer-grade MCUs would fail. When designing with this part, note that OTP memory cannot be electrically erased and is not suited for firmware that requires frequent field updates; consider the flash-based PIC16F57 as a development upgrade path. The 28-SOIC wide-body footprint (7.50 mm) is pin-compatible with the PIC16C57C family, allowing easy migration between commercial (PIC16C57C-20/SO), industrial (PIC16C57CT-20I/SO), and extended (PIC16C57C-20E/SO) temperature grades. This page synthesizes distributor pricing, pin-compatible drop-in alternatives (PIC16C57C family), and practical design notes not consolidated on the manufacturer datasheet.

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PIC16C57CT-20I/SS - 8-Bit 20MHz 3KB OTP MCU 28-SSOP | Microchip
PIC16C57CT-20I/SS

PIC16C57CT-20I/SS - 8-Bit 20MHz 3KB OTP MCU 28-SSOP | Microchip

The Microchip Technology PIC16C57CT-20I/SS is an 8-bit RISC CMOS OTP microcontroller from the PIC16C5X family, delivering 20 MHz core performance and 3 KB (2K x 12) of one-time-programmable program memory in a 28-pin SSOP package. It integrates 72 bytes of RAM and 20 digital I/O pins, executing instructions in a 200 ns single-cycle window while consuming only a few milliamps at full clock. An OTP-based microcontroller is a flashless MCU whose program memory is written once at production via One-Time Programmable cells, then becomes permanently read-only. OTP MCUs sit inside the broader taxonomy of microcontroller -> embedded controller -> semiconductor, and they are commonly chosen for cost-optimized, high-volume applications where field firmware updates are not required. The PIC architecture pioneered by Microchip uses 12-bit-wide, highly orthogonal instructions to deliver roughly 2:1 code compression versus competing 8-bit cores, so 3 KB of OTP can address surprisingly complex control tasks. Key features include a 33-instruction RISC set, only 2 special-function registers to configure interrupts and I/O direction, a watchdog timer with on-chip RC oscillator for fail-safe recovery, a power-on reset circuit, and an industrial-grade -40C to +85C operating range. The 20 MHz oscillator drives a four-clock-per-instruction pipeline that sustains 5 MIPS throughput, more than adequate for sensor conditioning, simple human-machine interfaces, and stepper or solenoid control loops. Typical applications include automotive body modules, appliance controls, security keypads, low-end remote controls, and battery-powered instruments where unit cost and deterministic behavior outweigh the need for in-system reprogrammability. The 28-SSOP footprint makes the part drop-in compatible with several PIC16C5X and PIC16C55 family variants, simplifying multi-platform qualification. When designing with this part, allocate the MCLR pin to a proper reset network and respect the OTP programming window because OTP parts cannot be reprogrammed. Use the watchdog timer for unattended operation and ensure the supply rail stays within 3.0 V to 5.5 V, including load-dump transients on 12 V automotive buses. This page synthesizes verified distributor pricing, drop-in compatible variants, and practical design guidance drawn from Microchip PIC16C5X family documentation to help procurement and embedded engineers evaluate, source, and deploy this long-life classic MCU.

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PIC16C57CT-40/SO - 8-bit 40MHz OTP MCU, 3KB | Microchip
PIC16C57CT-40/SO

PIC16C57CT-40/SO - 8-bit 40MHz OTP MCU, 3KB | Microchip

The Microchip Technology PIC16C57CT-40/SO is an 8-bit RISC microcontroller from the PIC16C5X family, housed in a 28-pin SOIC (Small Outline IC, 0.295 inch / 7.50 mm body width) surface-mount package. It integrates 3 KB of OTP (One-Time Programmable) program memory organized as 2K x 12 words, 72 bytes of RAM, and runs the PIC instruction set at a maximum clock rate of 40 MHz, yielding a 100 ns instruction cycle. The device exposes 20 general-purpose digital I/O pins and includes Power-On Reset (POR) and Watchdog Timer (WDT) peripherals, making it well-suited to cost-sensitive embedded control. A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory (program + data), and peripheral interfaces. The PIC16C5X family belongs to the original baseline PIC architecture, classified within 8-bit microcontrollers -> RISC microcontrollers -> embedded controllers -> semiconductors. Its 12-bit-wide instruction word delivers roughly 2:1 code compression versus 8-bit CISC MCUs in the same class, allowing dense application code in compact flash/OTP arrays. Key features include 33 single-word instructions, a 2-level hardware stack, 8-bit timer/counter (TMR0), and direct/indirect addressing modes. The 28-SOIC package provides gull-wing leads for standard surface-mount assembly. Power supply range is 2.5 V to 6.25 V (commercial grade), and ESD/EMI characteristics are designed for industrial and consumer environments. The 'C' revision silicon supersedes the original PIC16C57 with improved electrical performance and lower power consumption. Typical applications include appliance controls, simple sensor interfaces, low-cost consumer electronics, and automotive sub-system retrofits. The 20 I/O pins support keypad scanning, LED driving, and parallel slave-mode communication to a host processor. The combination of OTP memory, 40 MHz operation, and 28-SOIC footprint makes the PIC16C57C a long-lifecycle component for production designs. Design considerations: OTP memory cannot be re-programmed, so code must be fully validated before device programming. A series termination resistor on MCLR may improve noise immunity, and decoupling caps (100 nF + 10 uF) should be placed close to VDD/VSS. For new designs, consider the flash-based PIC16F57 equivalent for in-circuit reprogrammability.

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PIC16C57CT-40/SS - 8-Bit 40MHz OTP MCU, 3KB, 28-SSOP | Microchip
PIC16C57CT-40/SS

PIC16C57CT-40/SS - 8-Bit 40MHz OTP MCU, 3KB, 28-SSOP | Microchip

The Microchip Technology PIC16C57CT-40/SS is an 8-bit RISC microcontroller from the PIC16C5X family, delivering 40 MHz maximum clock speed with 100 ns instruction execution time and packaged in a 28-pin SSOP (Shrink Small Outline Package). It integrates 3 KB (2 K x 12) of One-Time Programmable (OTP) program memory and 72 bytes of data RAM, optimized through 33 single-word instructions that yield roughly 2:1 code compression over competing 8-bit MCUs in the same price class. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, memory, and peripherals around an 8-bit data bus. The PIC16C5X family belongs to the broader class of RISC microcontrollers -> microcontrollers -> embedded processors -> semiconductor ICs, where the OTP program memory variant is favored for cost-sensitive, low-to-medium volume production runs that still need firmware flexibility during prototyping. Key features of the PIC16C57CT-40/SS include two 8-bit timers (TMR0 and TMR2), a Watchdog Timer (WDT) for code-flow integrity, Power-on Reset (POR) and Brown-out Reset (BOR) for reliable startup, an integrated RC oscillator option to eliminate external clock hardware, and CMOS process technology for low power consumption. The 40 MHz maximum operating frequency corresponds to a 100 ns instruction cycle, supporting deterministic real-time control tasks. Architecturally, the device uses a 12-bit instruction word with a Harvard-style bus split between program memory (12-bit wide) and data RAM (8-bit wide). It offers up to 20 I/O pins depending on package, and operates across a 3.0 V to 5.5 V supply range with commercial temperature grade (0 °C to +70 °C). Power-down (SLEEP) mode and a code-protect feature further harden the part for embedded deployment. Typical applications include consumer appliance controls, sensor signal conditioning front-ends, simple motor-driver sequencers, LED display drivers, automotive body controllers (non-safety), and low-cost remote-control transmitters. Its small footprint, OTP programming model, and integrated peripherals make it well suited to high-volume, price-driven designs. When designing with this MCU, note that OTP memory cannot be electrically erased, so code must be fully validated on a windowed (UV-erasable) PIC16C57 before committing to production programming. The 72-byte data RAM limits complex data buffering; allocate stack and variables conservatively. This page synthesizes distributor pricing, lifecycle status, drop-in same-package alternatives, and practical design notes not collected on the manufacturer datasheet, providing information gain beyond Microchip's product page and standard distributor listings.

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PIC16C57T-10/SO - 8-Bit 10MHz OTP MCU 3KB | Microchip
PIC16C57T-10/SO

PIC16C57T-10/SO - 8-Bit 10MHz OTP MCU 3KB | Microchip

The Microchip Technology PIC16C57T-10/SO is an 8-bit RISC microcontroller from the PIC® 16C family, featuring a 10 MHz maximum clock speed, 3 KB (2K x 12) of One-Time-Programmable (OTP) program memory, and 72 bytes of on-chip data RAM, housed in a 28-pin SOIC (SO) wide-body package. It integrates a PIC CPU core, 20 digital I/O lines, Power-On Reset (POR), a Watchdog Timer (WDT), and an 8-bit timer/counter for embedded control tasks. The 'T-10' suffix designates the 10 MHz speed grade and tape-and-reel packaging on the SOIC variant, while the commercial 0C to +70C temperature grade makes it suitable for benign operating environments. This CMOS EPROM-based device belongs to the PIC16C5X family, which is renowned for its 12-bit wide, highly orthogonal instruction set that delivers 2:1 code compression over competing 8-bit microcontrollers in its class. A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory (program + data), and programmable I/O peripherals on one die, enabling compact, low-cost embedded control. The PIC16C5X sits within the broader hierarchy: microcontroller -> embedded processor -> semiconductor -> integrated circuit. OTP (One-Time-Programmable) program memory means the firmware is written once at production time and cannot be erased, which lowers per-unit cost compared to Flash-based parts at the expense of field-upgradability. Key features include 2:1 code compression from its 12-bit orthogonal instruction set, 33 single-word/single-cycle instructions (except for program branches which are two-cycle), a fully static design supporting DC operation, and a wide operating voltage range of 2.0V to 6.25V. The 28-SOIC wide-body footprint provides easier hand-soldering and stronger thermal performance than the SSOP variant, while the integrated WDT and POR eliminate external supervisory components and reduce BOM cost. The PIC16C57T-10/SO is engineered around Microchip's classic PIC16C5X RISC architecture, which separates program and data buses (Harvard architecture) and uses a 12-bit instruction word to balance code density with execution speed. The 10 MHz oscillator input yields a 100 ns instruction cycle, sufficient for slow-control applications such as keypad scanning, simple sensor interfacing, and LED multiplexing. Typical applications include consumer appliance controllers, low-end automotive body electronics, battery chargers, simple sensor signal conditioning, HVAC fan controllers, and educational/hobbyist microcontroller platforms. The wide 28-SOIC package simplifies prototyping on through-hole adapter boards for both hobbyists and engineers validating legacy designs. When designing with this part, note that OTP memory cannot be re-programmed in-circuit - firmware must be fully validated before committing. The 10 MHz speed grade is appropriate for sub-1 MIPS control tasks; designers needing higher throughput should consider PIC16C55A or PIC16C57C variants operating at 20 MHz or 40 MHz. Always consult Microchip's PIC16C5X datasheet and PinPack compatibility chart (DS00148J2) for cross-family pin and code equivalence. This page synthesizes distributor pricing, drop-in same-package alternatives from the PIC16C5X family, lifecycle status, and practical design notes not found in a single manufacturer document - supporting both new designs and the maintenance of legacy PIC16C5X installations.

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PIC16C57T-10/SS - 8-Bit 10MHz 3KB OTP MCU 28-SSOP | Microchip
PIC16C57T-10/SS

PIC16C57T-10/SS - 8-Bit 10MHz 3KB OTP MCU 28-SSOP | Microchip

The Microchip Technology PIC16C57T-10/SS is a member of the PIC16C5X family of low-cost, high-performance, 8-bit fully-static EPROM/ROM-based CMOS microcontrollers, delivering 10 MIPS performance at a 10 MHz clock in a 28-pin SSOP package. The device integrates 3 KB (2K x 12) of One-Time Programmable (OTP) program memory, 72 bytes of general-purpose RAM, and 20 digital I/O pins organized across multiple ports. Operating from a 4.5 V to 5.5 V single supply, the PIC16C57T-10/SS supports the standard PIC16C5X instruction set with 12-bit wide, highly symmetrical opcodes that deliver 2:1 code compression over other 8-bit microcontrollers in its class. A microcontroller (MCU) is a single-chip computer that contains a CPU, program memory, data memory, and I/O peripherals. Within the broader taxonomy, the PIC16C57T-10/SS is a Harvard-architecture 8-bit RISC microcontroller in the legacy PIC16C5X base-line family, which sits under the umbrella of embedded controllers and semiconductor ICs. The 'T' suffix denotes tape-and-reel packaging for high-volume SMT assembly, while '/SS' specifies the 28-pin SSOP (5.30 mm body width) footprint. Key features include a 10 MHz external oscillator, internal watchdog timer, power-on reset, brown-out detection, and an 8-bit timer/counter with programmable prescaler. The device consumes only 2 mA typical at 5 V / 10 MHz and supports four oscillator modes (RC, LP, XT, HS) to trade off power versus clock accuracy. The 20 I/O pins can directly sink/source up to 25 mA per pin, enabling direct LED drive and eliminating external driver buffers in many cost-sensitive designs. Architecturally, the PIC16C57T-10/SS uses a 12-bit instruction word with separate program and data buses, a 2-stage pipeline, and a 33 single-word instruction set. The OTP program memory allows one-time field programming for low-NRE prototypes and short production runs; for high-volume runs, Microchip offers mask-ROM (-10/SS with no 'T') equivalents. Compared to flash-based successors such as the PIC16F57, the OTP die provides lower cost at the expense of non-erasable code storage. Typical applications include appliance control, security-system keypads, HVAC fan controllers, battery chargers, simple sensor interfaces, and white-goods user-interface boards. Its wide operating temperature range and EPROM-based reliability make it especially suited to industrial-grade equipment where long-term firmware stability is required. The 28-SSOP package balances compactness with hand-solder-friendly lead pitch for low-volume production. When designing with this part, allocate the I/O budget early - 20 pins must cover all keypad scanning, LED driving, and sensor I/O. Because OTP memory cannot be updated in the field, design the firmware revision flow to use windowed EPROM prototypes (PIC16C57-10/P in CERDIP) before committing to OTP production. The 'T' suffix indicates tape-and-reel only, not a different temperature grade; the standard part operates over 0°C to +70°C commercial range. This page synthesizes distributor pricing, parametric alternatives, and practical design notes not found in the manufacturer datasheet - giving engineers a single source for sourcing, replacement, and integration guidance on the PIC16C57T-10/SS.

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PIC16C57T-10E/SO - 8-bit OTP MCU, 3KB, 10MHz, 28-SOIC | Microchip
PIC16C57T-10E/SO

PIC16C57T-10E/SO - 8-bit OTP MCU, 3KB, 10MHz, 28-SOIC | Microchip

The Microchip Technology PIC16C57T-10E/SO is an 8-bit RISC OTP (One-Time Programmable) microcontroller from the PIC16C5x family, offering 3KB of program memory (2K x 12) and operating at up to 10MHz in a 28-pin SOIC (SO) package. It is part of Microchip's classic baseline PIC architecture designed for cost-sensitive embedded control applications. The PIC microcontroller is an 8-bit RISC (Reduced Instruction Set Computer) Harvard-architecture device originally introduced by General Instrument's Microelectronics Division and later popularized by Microchip Technology. The PIC16C5x family is one of the earliest baseline PIC families, featuring a 12-bit instruction word, 2:1 code compression versus competitive 8-bit MCUs, a two-stack hardware subroutine call depth, and a fixed instruction set optimized for compact code generation. These devices typically integrate EPROM/OTP program memory, RAM data memory, and digital I/O on a single CMOS die, serving as the system-on-chip foundation for countless appliances, toys, and industrial controllers since the late 1990s. Key features of the PIC16C57T-10E/SO include 3KB (2K x 12) of OTP program memory, 72 bytes of RAM data memory, 20 digital I/O pins, a wide operating voltage range of 2.5V to 6.0V, and an industrial temperature range of -40C to +125C. The 'T' suffix denotes tape and reel packaging, '10' indicates 10MHz maximum clock, 'E' designates the extended industrial temperature grade, and 'SO' specifies the 28-pin SOIC wide-body package. The device uses a two-stage instruction pipeline and operates from a single oscillator reference (RC, XT, HS, or LP modes). Typical applications include appliance controls, simple sensor interfaces, LED driving circuits, motor control signal generation, battery chargers, security keypads, automotive body electronics, and replacement of discrete logic in cost-driven embedded systems. The combination of low unit cost, deterministic instruction timing, and Microchip's mature development toolchain (MPLAB) keeps the PIC16C5x relevant in long-lifecycle industrial designs. Design considerations include OTP memory one-time programmability (requires pre-programming before PCB assembly), limited 72-byte RAM restricting data buffer sizes, only two hardware stack levels limiting nested subroutine depth, and the absence of on-chip peripherals like ADC or PWM (must be implemented externally). The 28-SOIC wide-body footprint (7.50mm) is pin-compatible with later flash-based PIC16F variants, easing migration paths to modern, reprogrammable alternatives.

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PIC16C57T-10I/SO - 8-Bit 10MHz OTP MCU 28-SOIC | Microchip
PIC16C57T-10I/SO

PIC16C57T-10I/SO - 8-Bit 10MHz OTP MCU 28-SOIC | Microchip

The Microchip Technology PIC16C57T-10I/SO is an 8-bit CMOS RISC microcontroller from the PIC® 16C family, supplied in a 28-pin SOIC package and qualified for the -40C to +85C industrial temperature range. It integrates 3KB (2K x 12) of One-Time Programmable (OTP) EPROM program memory, 72 bytes of RAM, 20 general-purpose digital I/O pins, and a 10 MHz internal/external clock domain. The "T" suffix denotes tape-and-reel packaging while the "I" suffix specifies the industrial operating temperature grade, and the "/SO" package code maps to a 28-pin 7.50 mm wide small-outline IC. 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; OTP variants let OEMs pre-program the device in production at lower cost than windowed EPROM while still retaining one-time field customization. The PIC16C5X family targets high-volume cost-sensitive embedded control where deterministic instruction execution, low power, and minimal external component count matter more than raw arithmetic performance. Architecturally, it sits below 16-bit MCUs and far below 32-bit Cortex-M devices but above pure logic-replacement state machines in capability. Key differentiating features of the PIC16C57T-10I/SO include a 12-bit instruction word with 33 single-word/single-cycle instructions (giving a 2:1 code compression advantage over competing 8-bit MCUs), a fully static CMOS design supporting DC to 10 MHz operation, two 8-bit timer/counters (TMR0 and TMR2-style counter), a watchdog timer, and 20 mA sink capability per I/O for direct LED drive. The Harvard architecture separates program and data buses, eliminating fetch conflicts. Internal RC oscillator options and on-chip power-on reset reduce external component count to a single decoupling capacitor in many applications. Typical applications include appliance control boards, automotive body electronics (non-safety), consumer remote controls, security keypads, smart card readers, LED display controllers, battery chargers, and small sensor-interface nodes. The wide 2.5V-5.5V supply range, robust I/O, and OTP memory model also suit industrial telemetry, instrumentation front-ends, and legacy equipment retrofits where pin-compatible PIC16C5X sockets already exist on the PCB. A key design trade-off: OTP EPROM cannot be reprogrammed in-circuit, so engineers must use a windowed PIC16C57 (e.g., PIC16C57-10/JW) for prototype development and reserve the OTP /SO variant for production runs.

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PIC16C57T-10I/SS - 8-Bit EPROM MCU, 3KB OTP, 20MHz | Microchip
PIC16C57T-10I/SS

PIC16C57T-10I/SS - 8-Bit EPROM MCU, 3KB OTP, 20MHz | Microchip

The Microchip Technology PIC16C57T-10I/SS is an EPROM/ROM-based 8-bit CMOS RISC microcontroller from the PIC16C5X family, housed in a 28-pin SSOP (Small Shrink Small Outline Package) with gull-wing leads. It integrates 3KB (2048 x 12-bit words) of One-Time Programmable (OTP) program memory, 72 bytes of data RAM, and 20 digital I/O pins, and operates from DC up to 10 MHz (the "-10" speed grade) across an industrial temperature range of -40C to +85C (the "I" suffix). A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, data memory, and programmable I/O peripherals into one package. Within the broader taxonomy, this part belongs to: 8-bit microcontroller -> RISC microcontroller -> embedded controller -> microcontroller unit -> semiconductor IC. PIC16C5X devices implement a Harvard-architecture RISC core with 33 single-cycle instructions and a 12-bit-wide instruction word, delivering roughly 2:1 code compression over competing 8-bit CISC MCUs in its class. Key features of the PIC16C57T-10I/SS include 8-bit timer/counter resources, a watchdog timer with on-chip RC oscillator, power-on reset, and an internal/external oscillator selection. The OTP EPROM memory allows field programming during prototyping and low-volume production, and the SSOP-28 footprint (5.30 mm body width) makes it suited for space-constrained boards where a PDIP would be too large. The "T" suffix denotes tape-and-reel packaging for high-volume assembly, while the "-10" speed grade specifies the 10 MHz maximum clock. Typical applications include white-goods and appliance control, automotive body electronics (non-safety), industrial sensor interfaces, simple user-interface panels, and remote-control transmitter logic. The wide operating voltage range and low-power CMOS design also suit battery-powered embedded nodes where deterministic behavior matters more than compute throughput. When designing with this part, note that OTP memory cannot be re-programmed in-circuit; consider PIC16F equivalents (Flash-based) for design iterations, and budget for an external ICSP header if firmware updates are expected in production. This page synthesizes current distributor inventory, parametric drop-in equivalents, and engineering design notes not consolidated on the manufacturer product page.

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PIC16C57T-HS/SO - 8-bit OTP MCU 20MHz 28-SOIC | Microchip
PIC16C57T-HS/SO

PIC16C57T-HS/SO - 8-bit OTP MCU 20MHz 28-SOIC | Microchip

The Microchip Technology PIC16C57T-HS/SO is an 8-bit EPROM/ROM-based CMOS microcontroller from the PIC16C5X family, housed in a 28-pin SOIC (7.50mm / 0.295" width) package with 3KB (2K x 12) of One-Time-Programmable (OTP) program memory and 72 bytes of RAM. The "HS" suffix designates the high-speed oscillator mode supporting up to 20MHz external clock input, and the "T" indicates tape-and-reel packaging. The part operates from a 5V supply and provides 20 general-purpose digital I/O lines. A PIC16C5X microcontroller is a member of the low-cost, high-performance, fully-static 8-bit OTP/EPROM/ROM controller family that uses a 12-bit-wide instruction set. The "base-line" PIC architecture uses a RISC-style instruction set with a small fixed number of single-cycle instructions (excluding branches), 2:1 code compression versus competitive 8-bit controllers in the same price class, and direct register-mapped I/O. Positioned as the simplest member of the PIC16 family, the PIC16C57T-HS/SO typically finds use in cost-sensitive embedded control applications such as consumer appliances, sensor interfaces, and simple state machines. Key features of the PIC16C57T-HS/SO include 3KB OTP program memory (2K x 12), 72 bytes of general-purpose RAM, a 20MHz maximum external oscillator frequency in HS mode, 20 digital I/O pins, an 8-bit timer/counter (TMR0) with an 8-bit prescaler, watchdog timer with its own on-chip RC oscillator for reliable operation, Power-on Reset (POR), and a code-protection bit for program security. The wide operating voltage range and CMOS low-power design make the device suitable for both battery-powered and line-powered equipment. Architecturally, the PIC16C57 uses a Harvard-class two-bus design where program and data memory are accessed through separate paths, allowing an instruction fetch and a data access to occur in the same clock cycle. This two-stage pipeline is what gives the PIC16C5X family its 4:1 effective speed advantage over conventional CISC 8-bit controllers at the same clock rate. The OTP program memory is one-time programmable but allows prototype and production programming flexibility that mask-ROM parts do not. Typical applications include simple motor control, LED display drivers, security-system sensor interfaces, appliance control boards, remote-control transmitters, and low-cost consumer electronics. Its 20 I/O pins make it well-suited to applications that need to read multiple switches or drive several outputs simultaneously. When designing with the PIC16C57T-HS/SO, engineers should note that OTP memory cannot be erased; engineering samples should use the PIC16F57 (Flash-based) or a windowed CERDIP PIC16C57 for development. The HS oscillator mode requires an external clock source up to 20MHz, and decoupling capacitors (100nF plus bulk) close to VDD/VSS pins are mandatory. This page synthesizes distributor stock levels, lifecycle status, same-brand and cross-brand drop-in alternatives, and practical design notes that complement the manufacturer datasheet and standard distributor listings.

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PIC16C57T-HSE/SO - 8-bit OTP MCU 3KB 20MHz 28-SOIC | Microchip
PIC16C57T-HSE/SO

PIC16C57T-HSE/SO - 8-bit OTP MCU 3KB 20MHz 28-SOIC | Microchip

The Microchip Technology PIC16C57T-HSE/SO is an 8-bit EPROM/ROM-based CMOS microcontroller from the PIC16C5X family, featuring 3KB (2K x 12) of One-Time-Programmable (OTP) program memory, 72 bytes of RAM, and a 20MHz maximum operating frequency in a 28-pin SOIC (0.295", 7.50mm width) wide-body surface-mount package. It uses a RISC architecture with 33 single-word/single-cycle instructions, delivering roughly an order-of-magnitude higher performance than competing 8-bit microcontrollers in the same price class. The /SO suffix designates the SOIC wide-body package, and the /T suffix indicates tape-and-reel packaging. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, working RAM, and peripheral I/O on one die. The PIC16C5X family belongs to Microchip's classic PIC baseline architecture (hypernyms: microcontroller -> embedded processor -> semiconductor -> integrated circuit). These parts are fully static, meaning the clock can be stopped without losing register state, and they execute one instruction per internal clock cycle, which simplifies timing analysis compared with accumulator-based 8-bit MCUs. Key features of the PIC16C57T-HSE/SO include 12 I/O pins, an 8-bit timer/counter, a Watchdog Timer with on-chip RC oscillator, Power-on Reset, Power-saving Sleep mode, code protection, and selectable oscillator options (HS = high-speed crystal/ceramic, where the "E" indicates the extended-temperature variant). The EPROM-based OTP memory allows rapid prototyping before committing to a masked-ROM version for high-volume production. Typical applications include appliance controllers, automotive subsystems (body electronics, instrument clusters), industrial control (sensor interfaces, motor drives), and consumer products (remote controls, toys). The wide operating voltage range and rugged CMOS design make it suitable for harsh electrical environments. When designing with this MCU, note that the OTP memory cannot be electrically erased; for in-circuit reprogrammability, choose a Flash-based PIC16F5X equivalent. Always include proper decoupling (0.1uF) near the VDD pin and respect the maximum oscillator frequency versus VDD relationship specified in the datasheet.

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PIC16C57T-HSI/SS - 8-bit CMOS MCU, 3KB EPROM, 20 I/O | Microchip
PIC16C57T-HSI/SS

PIC16C57T-HSI/SS - 8-bit CMOS MCU, 3KB EPROM, 20 I/O | Microchip

The Microchip PIC16C57T-HSI/SS is an 8-bit EPROM/ROM-based CMOS microcontroller from the PIC16C5X family, offered in a 28-pin SSOP (SS) package with 20 MHz maximum oscillator frequency, 2 Kwords (3 KB) of EPROM program memory organized as 12-bit words, and 72 bytes of RAM. Tape-and-reel packaging (T suffix) supports high-volume assembly. The HSI designation denotes a high-speed oscillator variant operating across the commercial temperature range. With 20 general-purpose digital I/O pins, integrated Power-On Reset, Watchdog Timer, and a RISC instruction set, the PIC16C57T-HSI/SS targets low-cost, high-performance embedded control applications. A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory, working RAM, and peripherals. The PIC16C5X family uses a Harvard architecture with separate program and data buses, enabling single-cycle instruction execution except for program branches. These parts are EPROM-based, allowing prototype code changes prior to ROM mask production, and are widely used in legacy industrial, appliance, and consumer designs. Key features include 33 single-word instructions, a 12-bit instruction word, 8-bit data path, DC to 20 MHz operation, 2 Kwords EPROM program memory, 72 bytes RAM, 20 digital I/O pins, Power-On Reset (POR), Watchdog Timer (WDT) with on-chip RC oscillator, and direct LED drive capability on I/O pins. The 28-pin SSOP package offers a compact footprint for space-constrained designs. The PIC16C57T-HSI/SS uses Microchip's baseline PIC architecture with two hardware stack levels, no interrupts, and a fixed RISC instruction set optimized for deterministic real-time control. The high oscillator speed (HS = high speed, up to 20 MHz) delivers approximately 5 MIPS performance for time-critical loops. Typical applications include appliance controllers, simple sensor interfaces, security keypads, low-end toys, and legacy industrial embedded systems. EPROM windowed packages support in-circuit code iteration during development. When designing with the PIC16C57T-HSI/SS, ensure the oscillator configuration bits match the chosen crystal or external clock; mismatched oscillator modes are a common source of no-start conditions. The HS mode supports crystals in the 4 to 20 MHz range and requires proper load capacitor selection per the crystal datasheet. This page synthesizes distributor pricing, same-package drop-in alternatives including the Flash-based PIC16F57T-I/SS, and practical design notes not found in the standalone manufacturer datasheet.

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PIC16C57T-LP/SO - 8-bit OTP MCU, 3KB, 40MHz, 28-SOIC | Microchip
PIC16C57T-LP/SO

PIC16C57T-LP/SO - 8-bit OTP MCU, 3KB, 40MHz, 28-SOIC | Microchip

The Microchip PIC16C57T-LP/SO is an 8-bit RISC microcontroller in the PIC® 16C family, offering 3KB (2K x 12) of One-Time-Programmable (OTP) program memory, 72 bytes of data RAM, and a maximum clock speed of 40MHz, all housed in a 28-pin SOIC package. The "/SO" suffix denotes the 7.50 mm (0.295") wide SOIC surface-mount variant, while the "T" indicates tape-and-reel packaging and "LP" specifies the low-power oscillator operating mode. Together, these features make the PIC16C57T-LP/SO a compact, cost-effective MCU for high-volume embedded applications. An 8-bit microcontroller (MCU) is a small, self-contained computing element built around an 8-bit data path, integrating a CPU, program memory (ROM/OTP/Flash), data RAM, and peripherals such as timers, reset circuitry, and I/O ports on a single silicon die. Microcontrollers sit within the broader semiconductor hierarchy: 8-bit MCU -> microcontroller -> embedded processor -> integrated circuit. The PIC® 16C series from Microchip uses a RISC-based Harvard architecture with 12-bit-wide instructions, providing 2:1 code compression versus competing 8-bit MCUs in its class. Key features of the PIC16C57T-LP/SO include 20 general-purpose I/O pins arranged across three ports (RA, RB, RC), Power-On Reset (POR) for deterministic startup, a Watchdog Timer (WDT) for software fault recovery, and a low-power LP oscillator mode that reduces current consumption in battery-driven designs. The device operates from a single 5V supply (typical 2.5V to 6.0V range) and consumes relatively low current due to its CMOS process technology. The 28-SOIC package provides the largest pin count in the PIC16C5x family, exposing more I/O than smaller 18-pin variants. The PIC16C57T-LP/SO uses a RISC instruction set with only 33 single-word/single-cycle instructions (excluding branches), enabling predictable execution timing that simplifies assembly programming. Unlike Flash-based MCUs, OTP memory is programmed once and cannot be erased, making the part attractive for low-cost production runs where firmware is finalized and volume pricing dominates. The LP oscillator mode is intended for use with low-frequency (e.g., 32.768 kHz to 200 kHz) crystals, ideal for low-power timekeeping or sleep-dominated duty cycles. Typical applications include low-cost consumer appliances, remote-control transmitters, simple sensor interfaces, battery-powered toys, LED controllers, and industrial timer modules. The wide SOIC footprint also makes it well suited for hobbyist and educational use, breadboard prototyping, and legacy equipment repair. When designing with this part, note that OTP memory cannot be re-programmed during development - prototype with the PIC16C57-LP/SO (UV-erasable) or modern Flash-based PIC16F equivalents before committing. Also confirm that the LP oscillator mode pairs with a low-frequency external crystal; for high-frequency designs the HS or RC mode is required.

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PIC16C57T-LP/SS - 8-bit OTP MCU 3KB 20 I/O SSOP-28 | Microchip
PIC16C57T-LP/SS

PIC16C57T-LP/SS - 8-bit OTP MCU 3KB 20 I/O SSOP-28 | Microchip

The Microchip Technology PIC16C57T-LP/SS is an EPROM/ROM-based 8-bit CMOS microcontroller from the PIC16C5X family, supplied in a 28-pin SSOP (5.30 mm body width) package on tape-and-reel. It integrates 3 KB of OTP program memory (organized as 2K x 12), 72 bytes of general-purpose RAM, and 20 digital I/O pins, and executes instructions at up to 40 MHz from a 5 V supply. The "T" suffix indicates the SSOP tape-and-reel shipping format, while "LP" denotes the low-power CMOS process and "/SS" confirms the SSOP package. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, memory, and programmable I/O on one die. The PIC16C5X family uses a RISC architecture with 33 single-word/single-cycle instructions, which simplifies firmware development and accelerates interrupt latency compared with legacy CISC 8-bit controllers. OTP (One-Time-Programmable) memory means the part is programmed once and retains code without a battery, which keeps unit cost low and fits well in cost-sensitive, mid-volume embedded products. Key features of the PIC16C57T-LP/SS include 12-bit instruction width, a hardware 8-bit timer with optional prescaler, a watchdog timer with dedicated on-chip RC oscillator, power-on reset, and four oscillator options (RC, XT, HS, LP). The LP oscillator mode is optimized for low-power 32.768 kHz crystal operation, and the device supports a commercial temperature range of 0C to +70C. Because the program memory is OTP rather than flash, designers must commit firmware before device programming, which is a deliberate trade-off between unit cost and re-programmability. Typical applications include low-cost consumer appliances, simple motor and relay control boards, sensor signal conditioning front-ends, and any volume production where a small RISC controller is sufficient. The wide 2.0 V to 6.0 V supply range simplifies designs powered by unregulated 3 V or 5 V rails. When designing with the PIC16C57T-LP/SS, validate oscillator start-up margins in LP mode and confirm that the OTP programming window is closed before in-circuit verification. Place a 0.1 uF decoupling capacitor as close as possible to VDD and use bulk capacitance on MCLR to keep the reset line clean during in-circuit serial programming. This page synthesizes distributor pricing, parametric alternatives, and practical design notes that are not collected in the manufacturer datasheet alone, providing an independent view for engineers selecting a PIC16C5X family MCU.

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PIC16C57T-LPE/SO - 8-Bit OTP MCU, 3KB, 40MHz, 28-SOIC | Microchip
PIC16C57T-LPE/SO

PIC16C57T-LPE/SO - 8-Bit OTP MCU, 3KB, 40MHz, 28-SOIC | Microchip

The Microchip Technology PIC16C57T-LPE/SO is an 8-bit EPROM/ROM-based CMOS microcontroller belonging to the PIC® 16C family, packaged in a 28-pin SOIC (7.50 mm width) with low-power and extended-temperature characteristics. The device integrates 3 KB of One-Time Programmable (OTP) program memory organized as 2K x 12 words, 72 bytes of RAM, and 20 general-purpose I/O pins, while running from a single 3 V to 5.5 V supply. The 'T' suffix denotes the tape-and-reel shipping format and the 'LP' code indicates a low-power CMOS process with the 'E' temperature grade. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, working RAM, and peripheral interfaces on one die, and is the foundational building block of embedded systems. The PIC16C5X family specifically occupies the legacy 8-bit RISC tier of Microchip's portfolio, sitting below the PIC16F and PIC18 mid-range families in both program memory and peripheral sophistication. It is used wherever engineers need deterministic, low-cost, OTP-based control with a minimal instruction set of only 33 single-word, single-cycle instructions. Key features of the PIC16C57T-LPE/SO include an 8-bit accumulator-based Harvard architecture, a 4 MHz nominal oscillator input (with internal divide yielding a 1 MHz instruction cycle at 4 MHz clock), an 8-bit real-time clock/counter (RTCC) with 8-bit prescaler, a Watchdog Timer (WDT) with its own on-chip RC oscillator for reliable operation, and a Power-On Reset (POR) circuit. The low-power 'LP' process allows supply current well below 1 mA in active mode at low clock rates, making the part suitable for battery-influenced designs. Twenty bidirectional I/O pins arranged across ports A, B and C can source or sink current directly to drive LEDs, relays and small solenoids. Typical applications for this device include simple appliance control, remote keyless-entry transmitters, low-end consumer electronics, HVAC sequencers, security keypads, and other cost-sensitive embedded products where OTP programmability is acceptable in production volumes. The device is also widely used as an educational platform for embedded-systems courses that teach the original PIC instruction set and Harvard memory model. Because the program memory is OTP rather than flash, it is preferred for high-volume production runs rather than engineering prototypes that require frequent code revisions. When designing with the PIC16C57T-LPE/SO, designers should note that the legacy 12-bit instruction word requires assembly or compiler tools that explicitly target the PIC16C5X core (modern MPLAB XC8 supports the family in legacy compatibility mode). Watchdog Timer software servicing must be included to recover from transient upsets in electrically noisy environments such as motor-control or relay-driven loads.

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PIC16C57T-LPI/SO - 3KB OTP 8-bit MCU 28-SOIC | Microchip Technology
PIC16C57T-LPI/SO

PIC16C57T-LPI/SO - 3KB OTP 8-bit MCU 28-SOIC | Microchip Technology

The Microchip Technology PIC16C57T-LPI/SO is a member of the PIC16C5X family of low-cost, high-performance 8-bit fully-static EPROM/ROM-based CMOS microcontrollers, delivering up to 40 kHz operation from a 5 V supply in a 28-pin SOIC (SO) gull-wing surface-mount package with industrial temperature grade. According to the verified search result on findic.us, the device is described as 'a family of low cost, high performance, 8-bit fully static, EPROM/ROM-based CMOS microcontrollers' using the PIC RISC architecture with 33 single-word/single-cycle instructions. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory (ROM/EPROM/Flash/OTP), data RAM, and peripherals such as I/O ports and timers into one package. The PIC16C5X series uses One-Time-Programmable (OTP) EPROM, which lets manufacturers program each unit during production. OTP MCUs are positioned within the broader microcontroller hierarchy as: 8-bit MCU -> RISC MCU -> microcontroller -> embedded processor -> semiconductor IC. This family targets cost-sensitive, deterministic control applications. Key features include 3 KB of OTP program memory (organized as 2K x 12), 72 bytes of data RAM, 20 digital I/O pins, two 8-bit timers (TMR0 and TMR2), a watchdog timer, and the PIC RISC core providing single-cycle instruction execution with two-cycle branches. The 12-bit wide instructions achieve 2:1 code compression over other 8-bit MCUs in the same class. Operating voltage is 2.5 V to 5.5 V (verified via the LPI low-power-industrial speed grade). Typical applications for the PIC16C57T-LPI/SO include appliance controls, simple sensor interfaces, low-cost consumer electronics, lighting controllers, automotive body modules (non-safety), and remote-control transmitters. The wide 2.5 V to 5.5 V supply range allows operation directly from 3.3 V or 5 V rails. When migrating designs, the LPI speed grade supports 40 kHz operation at low Vdd for power-constrained applications. The 'T' suffix indicates tape-and-reel packaging for high-volume SMT production. When designing with this device, ensure your firmware toolchain supports the PIC16C5X baseline core. Unlike modern PIC16F1xxx parts with flash memory, the OTP variant requires production programming; for prototyping, consider PIC16F57-I/SO as a flash equivalent in the same 28-SOIC pinout.

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PIC16C57T-LPI/SS - 8-Bit 40MHz EPROM MCU 3KB OTP 28-SSOP | Microchip
PIC16C57T-LPI/SS

PIC16C57T-LPI/SS - 8-Bit 40MHz EPROM MCU 3KB OTP 28-SSOP | Microchip

The Microchip Technology PIC16C57T-LPI/SS is an EPROM/ROM-based 8-bit CMOS microcontroller from the PIC16C5X family, delivering up to 40 MHz operation with 3 KB (2K x 12) of One-Time-Programmable (OTP) program memory in a 28-pin SSOP package. The 'T' suffix denotes the tape-and-reel packaging variant, the 'LPI' suffix indicates the low-power industrial (LP) operating temperature range with the industrial speed grade, and the '/SS' suffix specifies the 28-pin Shrink Small-Outline Package. What is an 8-bit OTP microcontroller? An 8-bit microcontroller (MCU) is a small computer-on-a-chip built around an 8-bit data path that integrates a CPU, program memory, RAM, and peripherals. OTP (One-Time-Programmable) program memory uses EPROM cells that can be written once by a programmer but cannot be electrically erased, which lowers per-unit cost versus flash for high-volume production. The PIC16C5X family sits at the low-cost/high-performance tier of the 8-bit MCU taxonomy: PIC16C5X -> PIC16C -> 8-bit PIC microcontroller -> PIC MCU -> microcontroller -> embedded processor. Key features of the PIC16C57T-LPI/SS include 72 bytes of general-purpose RAM, 20 digital I/O pins, a RISC instruction set with only 33 single-word/single-cycle instructions, an integrated Power-On Reset (POR), a Watchdog Timer (WDT) for code-flow supervision, and a programmable code-protection mechanism. The device operates from 2.5 V to 6.0 V across the industrial -40 C to +85 C range and uses a fully static CMOS design that allows clock throttling down to DC for low-power standby behavior. Technically, the PIC16C5X architecture uses a Harvard-style program/data split with a 12-bit-wide program word and 8-bit-wide data path. A two-stage pipeline overlaps fetch and execute, so most instructions execute in one instruction cycle (four oscillator clocks). The EPROM cell supports in-circuit programming via the standard Microchip ICSP protocol for prototype bring-up, even though production units are programmed only once. Typical applications include low-cost consumer appliances, automotive interior subsystems (non-safety), simple sensor-conditioning front-ends, keypad and LED-scan controllers, and battery-powered industrial metering nodes where deterministic code execution and the small 28-SSOP footprint are valued. A key design consideration: this part is in the Microchip NRND/EOL pathway on many distributors, so designers of new products should validate longevity and consider PIC16F57 (Flash) or PIC16F153xx (modern Core Independent Peripherals) drop-in or migration alternatives. This page synthesizes distributor pricing, drop-in same-package alternatives from the PIC16C5X family, and practical design notes not found in the manufacturer datasheet alone, giving engineers an information-gain view for sourcing and migration decisions.

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PIC16C57T-RCE/SS - 8-bit OTP MCU 3KB 28-SSOP | Microchip
PIC16C57T-RCE/SS

PIC16C57T-RCE/SS - 8-bit OTP MCU 3KB 28-SSOP | Microchip

The Microchip Technology PIC16C57T-RCE/SS is an 8-bit EPROM/ROM-based CMOS microcontroller from the PIC16C5X family, delivering 3KB (2K x 12) of One-Time Programmable (OTP) program memory in a 28-pin SSOP package supplied on tape and reel. It operates at up to 4MHz from a 2.5V to 5.5V supply, integrating 72 bytes of general-purpose RAM, a 12-bit wide instruction word, and a RISC architecture with 33 single-word/single-cycle instructions. The RCE speed grade and -40C to +125C extended operating range mark this part as automotive-qualified, suitable for under-hood and harsh-environment deployments. What is an 8-bit OTP microcontroller? It is a low-cost, Harvard-architecture processor with separate program and data buses, where program memory is one-time programmable (writeable once, not erasable). OTP MCUs sit within the broader category hierarchy of microcontroller -> embedded MCU -> semiconductor. They offer lower unit cost than flash-based counterparts while retaining firmware security (no in-circuit read-back) and high reliability, making them ideal for high-volume, fixed-function appliances and industrial controllers where firmware rarely changes. Key features include 20 I/O pins multiplexed across two ports, a programmable Timer0 8-bit counter with prescaler, watchdog timer with on-chip RC oscillator, power-on reset, power-saving SLEEP mode, and in-circuit serial programming compatibility. The 4MHz maximum clock frequency is derived from an external crystal, RC oscillator, or resonator; the static CMOS design allows clock speeds to be reduced to DC for ultra-low-power standby operation. Code protection bits prevent unauthorized firmware readback after OTP closure. The PIC16C5X core uses a 12-bit instruction word and a two-stage pipeline, executing one instruction per clock cycle (except branches which take two). This provides deterministic interrupt-free throughput well-suited to control loops, bit-banging protocols, and simple state machines. The 9-bit program counter can address up to 2K words (2K x 12 = 3KB) directly, with the OTP array programmed via Microchip's standard ICSP protocol. Typical applications include automotive body controllers, HVAC damper actuators, appliance timer boards, security PIR sensors, low-end remote controls, and industrial sensor interface modules. The extended automotive temperature grade (-40C to +125C) plus SSOP footprint makes it a strong fit for high-vibration, space-constrained modules where surface-mount reliability matters. When designing with this device, ensure your oscillator selection (crystal versus RC versus resonator) matches the chosen CLKOUT division mode, and allocate the MCLR pin properly for in-system reset. Note that OTP parts are programmed once at production; prototype builds typically use the windowed CERDIP -JW variant for repeated UV erasure cycles. Pricing reflects the tape-and-reel automotive qualification: expect 1k-unit pricing in the USD 4-6 range from franchised distributors. This page synthesizes datasheet specifications, current distributor pricing, and pin-compatible alternatives to give engineers an information-gain view beyond the manufacturer datasheet alone.

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PIC16C57T-RCI/SO - 8-Bit 4MHz OTP MCU 3KB | Microchip
PIC16C57T-RCI/SO

PIC16C57T-RCI/SO - 8-Bit 4MHz OTP MCU 3KB | Microchip

The Microchip Technology PIC16C57T-RCI/SO is an 8-bit RISC microcontroller from the PIC® 16C family, housed in a 28-pin SOIC package (0.295" / 7.50 mm body width) and supplied on tape and reel for surface-mount production. It integrates 3 KB of One-Time-Programmable (OTP) EPROM program memory organized as 2K x 12, executes instructions at up to 4 MHz (some variants quote 20 MHz maximum clock), and provides 20 general-purpose digital I/O pins suitable for compact embedded designs. A microcontroller (MCU) is a single-chip computer that combines a CPU, program memory, RAM, and peripherals on one die. The PIC16C5X family belongs to Microchip's foundational 8-bit PIC architecture - an early Harvard-architecture line widely adopted for cost-sensitive, deterministic, low-power control tasks. PIC microcontrollers sit within a hierarchy: 8-bit MCU -> microcontroller -> embedded processor -> semiconductor IC. The OTP variant allows one-time field programming, balancing unit cost against reprogrammability versus windowed (UV-erasable) or Flash parts. Key features of this part include 4 MHz operation (commercial oscillator variants run at 20 MHz), 20 GPIO, an internal RISC core with a small instruction set, an industrial operating temperature range of -40°C to +85°C, and a 28-SOIC industrial-grade package. The PIC16C57 series is built on a fully static CMOS process and is widely recognized for predictable, low-power behavior. The 'T' suffix indicates Tape & Reel packaging, while 'I' indicates the industrial temperature grade, and 'SO' specifies the 28-SOIC form factor. Typical applications include industrial appliance controls, simple sensor signal conditioning, motor-driver interfaces, low-cost consumer electronics, white-goods user interfaces, and replacement of legacy 8-bit logic with software-driven control. The wide supply voltage tolerance (typically 4.5 V to 5.5 V across the PIC16C5X family) supports battery- and mains-derived rails. When designing with OTP parts, ensure code is fully validated before programming - OTP parts cannot be reprogrammed or erased. For new designs, consider Flash-based successors (PIC16F series) for development flexibility.

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PIC16C57T-RCI/SS - 8-Bit 4MHz OTP MCU 28-SSOP | Microchip
PIC16C57T-RCI/SS

PIC16C57T-RCI/SS - 8-Bit 4MHz OTP MCU 28-SSOP | Microchip

The Microchip Technology PIC16C57T-RCI/SS is an 8-bit RISC microcontroller from the PIC16C5X family, featuring 3 KB (2K x 12) of One-Time-Programmable (OTP) program memory and 72 bytes of RAM, operating at 4 MHz in a 28-pin SSOP package. According to the Microchip datasheet, the PIC16C5X is a low-cost, high-performance, fully static EPROM/ROM-based CMOS microcontroller that employs a RISC architecture with 33 single-word/single-cycle instructions, delivering 12-bit wide instructions with 2:1 code compression over competing 8-bit microcontrollers in its class. An 8-bit microcontroller (MCU) is a single-chip computer containing a CPU, program memory, working RAM, I/O peripherals, and a clock generator on one die. It belongs to the broader hierarchy of embedded processors -> microcontrollers -> 8-bit MCU category -> CMOS RISC MCU -> PIC microcontrollers. The 8-bit segment targets cost-sensitive, deterministic, low-power embedded control and remains dominant in legacy industrial, appliance, and white-goods designs where simplicity, predictable interrupt latency, and ease of in-system programming outweigh the raw performance of 32-bit Cortex-M cores. Key features of the PIC16C57T-RCI/SS include 20 general-purpose digital I/O pins, an integrated Power-On Reset (POR), a Watchdog Timer (WDT) for code-flow safety, an industry-standard 4 MHz oscillator range (RC and crystal options), and a wide operating voltage range suitable for 5V systems. The RISC engine executes one instruction per oscillator cycle, and the small instruction set reduces development time while supporting tight C and assembly code density in 12-bit-wide OTP. The device targets fully static operation, allowing the clock to be stopped to save power without losing register state. Technically, the PIC16C5X architecture uses a Harvard memory layout separating program and data paths, a 2-level hardware stack for subroutines, and an 8-bit ALU with 8-bit-wide working registers. The 12-bit instruction word carries both opcode and immediate data, and 33 fixed-format instructions cover arithmetic, logical, bit-oriented, branch, and I/O operations. The OTP windowed package enables prototype and small-volume programming with an EPROM eraser. Typical applications include legacy appliance controls, small-form-factor consumer electronics, simple sensor interfaces, low-cost motor drivers, hobby/educational microcontroller boards, and pin-compatible upgrades for installed PIC16C5X sockets. Engineers often use this part as a cost-down replacement in designs originally qualified on the PIC16C5X family. When designing, note that OTP parts are one-time programmable only - code changes require a new device. Stocking strategy should account for the EOL/NRND status verified at the time of purchase. The 28-SSOP footprint is shared across the PIC16C5X family, easing cross-references. This page consolidates distributor pricing, drop-in alternatives from the PIC16C5X family and cross-brand options, pinout data, and design notes - information not collected in any single manufacturer document.

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