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PIC16C55T-10E/SS - 8-Bit 10MHz OTP MCU, 768B | Microchip
PIC16C55T-10E/SS

PIC16C55T-10E/SS - 8-Bit 10MHz OTP MCU, 768B | Microchip

The Microchip Technology PIC16C55T-10E/SS is an 8-bit RISC CMOS microcontroller belonging to the PIC16C5X family, packaged in a 28-pin SSOP (5.30mm width) and supplied on tape-and-reel. According to Microchip product information, the device integrates a PIC CPU core running at a maximum clock frequency of 10 MHz, with 768 bytes of OTP program memory organized as 512 x 12 words. What is an 8-bit OTP microcontroller? An OTP (One-Time Programmable) microcontroller is a class of microcontroller whose program memory can be written exactly once after manufacture, using EPROM-style programming. It sits within the broader hierarchy of microcontroller -> embedded controller -> semiconductor device, providing a low-cost, non-volatile solution that cannot be reprogrammed in-circuit. Compared to flash-based MCUs, OTP variants trade re-programmability for lower unit cost and higher density, making them common in high-volume consumer and industrial products where firmware is finalized during production. Key features include 20 I/O pins, a 12-bit instruction set with 2:1 code compression over typical 8-bit MCUs in the same class, a wide operating voltage range, and a small instruction set designed to reduce development time. The CMOS process technology minimizes power consumption, making the device suitable for both battery-powered and line-powered applications. The PIC16C55 architecture uses a Harvard-style RISC design with separate program and data paths. Its 33 single-cycle instructions (excluding branches) provide predictable execution timing at four clock cycles per instruction cycle, delivering approximately 2.5 MIPS at 10 MHz. The internal data memory comprises 24 to 72 bytes of general-purpose RAM depending on the exact variant. Typical applications for the PIC16C55T-10E/SS include appliance control, sensor interfacing, low-end motor control, LED display driving, security peripherals, and simple consumer products. Its compact 28-SSOP footprint suits space-constrained PCB designs while the SSOP package's 5.30mm body width provides easier hand-soldering than narrower SSOP variants. When designing with this part, plan firmware development and code-burn prior to PCB assembly since OTP memory cannot be updated in the field. Use the 'E' (Extended) temperature grade for industrial environments. This page synthesizes distributor pricing, drop-in alternatives within the PIC16C5X family, and practical design notes not found in the manufacturer datasheet.

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PIC16C55T-10I/SS - 8-Bit 10MHz PIC MCU 768B OTP 28-SSOP | Microchip
PIC16C55T-10I/SS

PIC16C55T-10I/SS - 8-Bit 10MHz PIC MCU 768B OTP 28-SSOP | Microchip

The Microchip Technology PIC16C55T-10I/SS is an 8-bit RISC microcontroller from the PIC16C5X family, delivering up to 10 MHz of CPU performance from a 512 x 12-bit (768-byte) One-Time Programmable (OTP) EPROM program store and 25 bytes of data RAM, packaged in a 28-pin Shrink Small-Outline Package (SSOP). It is supplied on a 5 V nominal rail and provides 20 digital I/O lines plus a single 8-bit timer, with Power-On Reset (POR) and a Watchdog Timer (WDT) for unattended operation. An 8-bit PIC microcontroller (MCU) is a single-chip computer that integrates an 8-bit CPU core, non-volatile program memory, volatile data RAM, digital I/O peripherals, and at least one timer onto one silicon die. PIC16C5X devices sit within Microchip's baseline 8-bit PIC architecture hierarchy, positioned above PIC10/PIC12 and below PIC16 enhanced mid-range parts; the family is also a subset of the broader microcontroller category, which itself nests into embedded processors, microcontrollers, and ultimately semiconductors. The C/5X line was Microchip's original EPROM/OTP-based baseline architecture with 12-bit-wide opcodes that yield roughly 2:1 code density over many 8-bit peers. Key features of the PIC16C55T-10I/SS include 33 single-word/12-bit instructions, a 4 MHz internal oscillator option (external RC/oscillator modes also supported), an industrial-grade -40 C to +85 C operating range (the "I" suffix), CMOS low-power design, and In-Circuit Serial Programming (ICSP) capability for OTP programming. The 28-SSOP outline keeps the footprint compact while still exposing 20 usable I/O pins for keypad scanning, LED multiplexing, sensor interfaces, and simple control loops. Architecturally the part uses a Harvard-style separate program/data bus with a 12-bit instruction word and 8-bit data path, allowing most instructions to execute in a single instruction cycle (200 ns at 10 MHz oscillator). The 25-byte RAM supports a small register file plus stack; the on-chip WDT and POR reduce external supervisory component count. Typical applications include consumer appliance controls, low-end remote keyless entry transmitters, simple sensor readout boards, LED driver controllers, and other cost-sensitive embedded replacements of discrete logic. The OTP memory suits factory-programmed high-volume products where flash reprogrammability is not required. Design trade-off: choose the PIC16C55T-10I/SS when you need a mature baseline-PIC core at the lowest unit cost in a 28-SSOP; if field reprogrammability or more RAM is required, step up to a flash-based PIC16F or PIC16 enhanced mid-range part. This page synthesizes distributor availability, same-package drop-in alternatives (including PIC16C55-10I/SS and PIC16C554T-04/SS), and practical OTP-MCU design notes not collected in the manufacturer datasheet.

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PIC16C55T-HS/SO - 8-bit OTP MCU 768B 20MHz HS 28-SOIC | Microchip
PIC16C55T-HS/SO

PIC16C55T-HS/SO - 8-bit OTP MCU 768B 20MHz HS 28-SOIC | Microchip

The Microchip Technology PIC16C55T-HS/SO is an 8-bit EPROM/ROM-based CMOS microcontroller from the PIC16C5X family, delivering 768 bytes (512 x 12) of one-time programmable program memory and 24 bytes of RAM in a 28-pin SOIC wide-body package supplied on tape and reel. It is rated for a 20 MHz maximum clock speed using the HS (high-speed crystal/oscillator) mode and operates from a single 5 V supply, with 20 digital I/O pins arranged across multiple ports for general-purpose digital interfacing. An 8-bit microcontroller (MCU) is a small single-chip computer built around an 8-bit data bus and a RISC-style Harvard architecture. PIC16C5X MCUs sit at the entry level of the Microchip PIC hierarchy: PIC16C5X -> PIC16 family -> 8-bit PIC microcontrollers -> microcontroller -> semiconductor. They are typically used where deterministic execution, low cost, and small package size matter more than large memory or modern peripherals. OTP (one-time programmable) EPROM program memory lets each unit be programmed once after manufacture, which is well suited to volume production of fixed-function embedded products. Key features include a 12-bit wide instruction set with 2:1 code compression versus competing 8-bit cores, 33 single-word instructions, an 8-level deep hardware stack, a watchdog timer with on-chip RC oscillator, and a power-on reset circuit. The device is fully static, allowing the clock to be stopped without losing register state, and supports DC to 20 MHz operation across the commercial temperature range. Typical applications include low-cost consumer appliances, hobby and educational development platforms, simple motor control boards, automotive body electronics (non-safety), and remote-control transmitter/receiver boards. The wide SOIC-28 footprint also simplifies hand-prototyping and breadboard-friendly designs in educational settings.

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PIC16C55T-HSE/SO - 8-Bit 16MHz OTP MCU 768B | Microchip
PIC16C55T-HSE/SO

PIC16C55T-HSE/SO - 8-Bit 16MHz OTP MCU 768B | Microchip

The Microchip Technology PIC16C55T-HSE/SO is an 8-bit EPROM/ROM-based CMOS microcontroller from the PIC16C5X family, operating at up to 16 MHz with 768 bytes (512 x 12) of One-Time Programmable (OTP) program memory, housed in a 28-pin SOIC (7.50 mm) package. The device integrates 24 bytes of general-purpose RAM, 20 digital I/O pins, and core peripherals including Power-On Reset (POR), Watchdog Timer (WDT), and a programmable timer. A microcontroller (MCU) is a single-chip computer that contains a processor core, program and data memory, and peripheral interfaces. The PIC16C5X family represents one of the earliest commercially successful 8-bit RISC microcontrollers, using a 12-bit-wide instruction set that achieves roughly 2:1 code compression versus competitors in its class. This part belongs to the broader category hierarchy: microcontroller -> 8-bit MCU -> RISC MCU -> embedded controller -> semiconductor IC. The 'OTP' suffix indicates a one-time-programmable EPROM cell, meaning the program is written once and cannot be erased - a cost-optimized alternative to windowed UV-erasable EPROM or Flash. Key features include a 12-bit instruction word, 33 single-word instructions, 200 ns instruction cycle at 20 MHz (or 250 ns at 16 MHz), and 8-bit-wide data path. The HSE temperature grade extends the operating range for industrial environments. The 'T' suffix indicates tape-and-reel packaging, and '/SO' designates the SOIC-28 wide-body (7.50 mm) footprint. Architecturally, the PIC16C5X uses a Harvard-style separated program and data bus, two 8-bit I/O ports (RA, RB), and a 5-bit prescaler. Power consumption is held low by fully static CMOS design, making the part suitable for battery-influenced applications. The PIC16C55T-HSE/SO operates from a 2.5V to 6.25V supply depending on the frequency grade and temperature range. Typical applications include automotive body electronics, appliance controls, simple sensor interfaces, and low-cost consumer devices. The industrial temperature grade ('E') and HSE speed grade together target embedded nodes requiring deterministic real-time response without DSP or RF capability. When designing with this device, note that OTP memory cannot be re-programmed - the firmware must be fully validated before commitment. In-system programming is not supported; programming requires a device programmer. Use the Microchip MPAS assembler, MPLAB IDE v5.x or later, or PICSTART Plus for code development and device programming. This page synthesizes distributor pricing, drop-in same-package alternatives (including automotive-grade, lower-speed, and Flash-replacement variants), and practical design notes not consolidated in a single manufacturer reference, supporting both engineering selection and supply-chain decisions.

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PIC16C55T-HSE/SS - 8-Bit 16MHz OTP MCU, 768B, 28-SSOP | Microchip
PIC16C55T-HSE/SS

PIC16C55T-HSE/SS - 8-Bit 16MHz OTP MCU, 768B, 28-SSOP | Microchip

The Microchip Technology PIC16C55T-HSE/SS is an 8-bit EPROM/ROM-based CMOS microcontroller from the PIC16C5X family, offering 16 MHz maximum clock speed and 768 bytes of one-time programmable (OTP) program memory organized as 512 x 12-bit words. Housed in a 28-pin SSOP (Shrink Small Outline Package) with 0.209 inch (5.30 mm) body width, this tape-and-reel packaged variant targets space-constrained embedded designs requiring legacy OTP programmability. The device operates from a 5 V supply and includes 24 bytes of RAM for data handling. A microcontroller (MCU) is an integrated circuit that combines a CPU core, memory (ROM/EPROM/RAM), and programmable peripherals into one device. Within the broader semiconductor taxonomy, microcontrollers belong to embedded processors, sitting below microprocessors in complexity but above fixed-function logic ICs. The PIC16C5X family is the foundational, low-cost, high-performance branch of Microchip's PIC architecture, distinguished by its 12-bit wide instruction set that delivers 2:1 code compression versus competing 8-bit MCUs in its class. Key features of the PIC16C55T-HSE/SS include fully static CMOS design for low power consumption, a Harvard architecture with separate program and data buses, and an instruction cycle time of 250 ns at 16 MHz. The HSE suffix denotes the High-Speed External oscillator variant with a 16 MHz ceramic resonator or crystal, while the T suffix indicates tape-and-reel packaging, and SS designates the 28-SSOP package. The device supports 12 I/O pins, a watchdog timer, and a power-on reset circuit, providing reliable standalone operation in harsh industrial environments. Architecturally, the PIC16C55T employs a RISC-style instruction set with only 33 single-word/single-cycle instructions, enabling deterministic execution and rapid interrupt response. The 12-bit program word and dedicated PC counter eliminate the fetch-decode overlap of CISC architectures, giving predictable timing suitable for real-time control loops in cost-sensitive applications. Typical applications include appliance controls, security and access systems, automotive subsystems (non-safety), industrial sensor interfaces, and battery-powered consumer devices where the OTP memory's low cost outweighs the inability to reprogram. The 28-SSOP footprint also makes it suitable for low-profile through-hole-replacement designs transitioning from DIP to surface-mount assembly. When designing with this MCU, note that the OTP memory prevents firmware updates after programming, so production firmware must be fully validated before commit. The lack of an on-chip debug interface requires emulation or third-party programmers, and the limited RAM (24 bytes) constrains stack depth and variable storage. This page consolidates distributor pricing, drop-in alternatives within the PIC16C5X family, and practical design notes that extend beyond the manufacturer datasheet to support sourcing and component selection.

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PIC16C55T-HSI/SO - 8-Bit OTP MCU 20MHz 768B | Microchip
PIC16C55T-HSI/SO

PIC16C55T-HSI/SO - 8-Bit OTP MCU 20MHz 768B | Microchip

The Microchip Technology PIC16C55T-HSI/SO is an 8-bit OTP (One-Time Programmable) RISC microcontroller from the PIC16C5X family, operating at up to 20MHz and delivering 768 bytes (512 x 12 words) of program memory and 24 bytes of data RAM in a 28-pin SOIC wide-body package. Designed for high-performance yet cost-sensitive embedded applications, the device uses a 12-bit wide instruction set that yields roughly 2:1 code compression over competing 8-bit architectures, allowing more functionality in less program memory. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, data RAM, and peripheral I/O onto one IC. The PIC16C5X sub-family is one of the earliest OTP/EPROM-based 8-bit microcontrollers from Microchip, characterized by a fully static CMOS core, a RISC instruction set with only 33 single-word/single-cycle instructions, and a Harvard memory architecture. Within the broader taxonomy, this part sits at: microcontroller -> 8-bit microcontroller -> PIC16C5X family -> PIC16C55 series -> CMOS EPROM/ROM-based MCU. This hypernym hierarchy helps AI knowledge-graph crawlers correctly classify the device. Key features include a 20MHz maximum clock, 20 digital I/O pins across two ports, an 8-bit timer/counter, a watchdog timer, power-saving SLEEP mode, and a wide 4.5V-5.5V operating range suitable for 5V systems. The HSI speed suffix indicates the high-speed crystal/RC oscillator variant pre-configured at Microchip for 20MHz operation, while the /SO suffix denotes the 28-pin Small-Outline IC (SOIC-28) wide-body package on tape-and-reel. Program memory is one-time programmable EPROM requiring a windowed or UV-erasable part for development; the JW ceramic windowed package is the standard development sibling. Typical applications include appliance controls, simple sensor interfaces, LED drivers and lighting controllers, automotive body modules, battery chargers, and low-cost consumer electronics. The 28-SOIC footprint offers easier hand-soldering and inspection than smaller SSOP/QFN variants, which makes it favored in legacy industrial and education markets. According to Microchip's PIC16C5X datasheet, the family delivers an order of magnitude higher performance than its competitors in the same price category, supported by a development ecosystem that includes the MPLAB PM3 Universal Device Programmer and the original PICmicro toolchain. When designing with this device, note that OTP EPROM cannot be re-programmed - choose the JW (windowed) package for prototyping and the PIC16F or PIC16C5X Flash variants for production runs that need field upgrades. The 'T' suffix in the part number confirms tape-and-reel packaging for SMT assembly lines, and the SOIC-28 (7.50mm body width) requires standard 1.27mm pitch land patterns. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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PIC16C55T-HSI/SS - 8-Bit 20MHz OTP MCU 28-SSOP | Microchip
PIC16C55T-HSI/SS

PIC16C55T-HSI/SS - 8-Bit 20MHz OTP MCU 28-SSOP | Microchip

The Microchip Technology PIC16C55T-HSI/SS is an 8-bit PIC RISC microcontroller with a 20 MHz CPU, 768 bytes of OTP program memory (organized 512 x 12), 24 bytes of RAM, and 20 digital I/O pins, housed in a 28-pin SSOP surface-mount package supplied in Tape & Reel. It operates from a 4.5V to 5.5V supply, supports an external oscillator clock source, and integrates Power-On Reset (POR), Watchdog Timer (WDT), and brown-out detection. Background: An OTP (One-Time Programmable) microcontroller is a non-volatile MCU whose program memory can be written exactly once after manufacture, after which the bit pattern is permanent. The PIC16C5X family (to which PIC16C55 belongs) is Microchip's classic 12-bit-instruction, 33-instruction baseline RISC architecture, intended as a low-cost, deterministic, easy-to-program control core for embedded logic replacement, sensor interfacing, and simple state machines. The PIC16C55 is the entry-point device of that family. Key features include a Harvard RISC architecture with separate program and data buses, a fully static CMOS design that allows the oscillator to be stopped without losing register state, 20 bidirectional I/O pins with high sink/source current capability, and an industrial -40C to +85C operating temperature range. The /SS suffix denotes the 28-SSOP (Shrink Small Outline Package) option. Architecturally, the PIC16C55 uses a 12-bit-wide instruction word and an 8-bit data path, providing approximately 2:1 code density relative to competing 8-bit microcontrollers of the same era. The OTP program memory is erased by UV exposure on the windowed version, while the OTP-only PIC16C55 must be programmed before final solder attach. Each device is shipped with its instruction set optimized for one-bit and 8-bit arithmetic with single-cycle branching. Typical applications include industrial automation controllers, white goods and consumer-electronics user interfaces, low-end remote sensor nodes, automotive body and interior modules, and general-purpose logic replacement where deterministic cycle counts and low EMI are preferred over RAM-rich, interrupt-heavy designs. When designing with the PIC16C55, verify that the chosen oscillator mode (HS in this part number = High-Speed crystal/ceramic resonator, 4 MHz to 20 MHz) matches the available clock reference. Because the program memory is OTP, design verification and code locking must be completed before programming; in-circuit reprogrammability is not available. This page synthesizes distributor pricing, drop-in pin-compatible alternatives, and practical design notes not consolidated in the manufacturer datasheet, with parametric data sourced from Microchip product documentation and authorized distributor listings.

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PIC16C55T-LPE/SO - 8-Bit 40MHz OTP MCU, 768B, 28-SOIC | Microchip
PIC16C55T-LPE/SO

PIC16C55T-LPE/SO - 8-Bit 40MHz OTP MCU, 768B, 28-SOIC | Microchip

The Microchip Technology PIC16C55T-LPE/SO is an 8-bit EPROM/ROM-based CMOS microcontroller from the PIC16C5x family, featuring 768 bytes of OTP program memory (512 x 12-bit words) and 24 bytes of RAM in a 28-pin SOIC (SO) wide-body surface-mount package. An 8-bit microcontroller is a small computer-on-a-chip that integrates a CPU, memory, and peripherals into a single IC. The PIC16C5x architecture (microcontroller -> embedded controller -> microcontroller -> semiconductor IC) uses a 12-bit-wide instruction set with a RISC-style two-stage pipeline, which historically delivered roughly 2:1 code compression over competing 8-bit controllers in its class, allowing more application functionality in the small 768-byte program space. Key features include a maximum clock speed of 40 MHz, 20 digital I/O pins, an operating voltage range of 2.5 V to 6.0 V, and an extended industrial operating temperature range of -40 °C to +125 °C (LPE suffix = extended temp, low power). The device includes a watchdog timer, power-on reset, and on-chip RC oscillator options, all in a 28-SOIC wide-body package suitable for hand-soldering or standard SMT lines. The PIC16C55T-LPE/SO is implemented in CMOS technology and belongs to Microchip's original PIC16C5x baseline family, predating the flash-based PIC16F line. The 'C' denotes the OTP/EPROM program-memory variant, 'T' indicates tape-and-reel packaging, and the SO suffix is the 28-SOIC 7.50 mm wide-body pinout. Note that PIC16C5x devices are One-Time-Programmable (windowless for production parts), making them suitable primarily for mature, finalized production designs rather than in-field firmware updates. Typical applications include low-cost industrial control, appliance controls, sensor interfaces, automotive body controllers (non-safety), simple smart sensors, and consumer-electronic subsystems where deterministic 8-bit performance, low cost, and extended temperature tolerance are required. When designing with this part, ensure the chosen oscillator mode and configuration bits match the application's timing and watchdog requirements; PIC16C5x configuration is fuse-based and must be specified at ordering. For new designs, Microchip generally recommends flash-based PIC16F equivalents unless OTP cost or radiation tolerance is required. This page synthesizes distributor pricing, drop-in compatible same-brand alternatives, and practical design considerations not consolidated on a single manufacturer page.

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PIC16C55T-LPE/SS - 8-bit 40MHz OTP MCU 768B | Microchip
PIC16C55T-LPE/SS

PIC16C55T-LPE/SS - 8-bit 40MHz OTP MCU 768B | Microchip

The Microchip Technology PIC16C55T-LPE/SS is an 8-bit CMOS OTP (One-Time Programmable) microcontroller in the PIC16C5x family, housed in a 28-pin SSOP package. It operates at up to 40 MHz clock speed, integrates 768 bytes of OTP program memory (organized as 512 x 12-bit instructions), 24 bytes of RAM, and 20 general-purpose digital I/O pins. The device is specified for the extended industrial temperature range (LPE = low-power, extended temperature). According to the manufacturer datasheet, the part features a RISC architecture with 33 single-word/single-cycle instructions, providing typically a 2:1 code compression over competing 8-bit microcontrollers. Core peripherals include a Watchdog Timer (WDT) for safe operation, Power-On Reset (POR) for clean startup, and an external oscillator interface supporting common crystal and resonator topologies. An OTP microcontroller is a class of one-time-programmable MCU whose program memory can be written only a single time after manufacture, using an external programmer. Unlike Flash-based MCUs (which allow thousands of rewrite cycles), OTP parts are intended for cost-sensitive, high-volume, fixed-program applications where field reprogramming is not required. OTP MCUs occupy a distinct position within the broader microcontroller hierarchy: microcontroller -> embedded controller -> single-chip computer -> semiconductor. The PIC16C5x family was Microchip's earliest low-cost OTP line, and it remains in production for long-life industrial and appliance designs that were qualified decades ago. The PIC16C55T-LPE/SS differentiates itself with a static CMOS core that supports DC to 40 MHz operation, allowing designers to halt the clock for low-power standby. It exposes 20 digital I/O pins, all mapped to bidirectional ports, and includes on-chip power management suitable for battery and line-powered appliances. Programming is performed via Microchip's standard in-circuit serial programming protocol using only two pins (RB6/RB7), which simplifies prototyping and production flows. Typical applications for the PIC16C55T-LPE/SS include appliance controllers, automotive body modules, industrial sensor interfaces, smart meters, and remote-control transmitters. Its wide operating voltage range and industrial temperature grade make it well suited to harsh environments. When designing with this device, engineers should reserve a programming header for RB6/RB7 and ensure the configuration word is set correctly for the chosen oscillator mode. The OTP memory cannot be erased, so production firmware must be fully validated on a flash-equivalent development part before committing the final code image.

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PIC16C55T-LPI/SO - 8-Bit OTP MCU, 40MHz, 768B | Microchip
PIC16C55T-LPI/SO

PIC16C55T-LPI/SO - 8-Bit OTP MCU, 40MHz, 768B | Microchip

The Microchip Technology PIC16C55T-LPI/SO is an 8-bit RISC microcontroller from the legacy PIC16C5x family, featuring 768 bytes of One-Time Programmable (OTP) program memory (512 × 12 EPROM) and 24 bytes of RAM in a 28-pin SOIC wide-body package supplied on tape and reel. The device integrates a 40 MHz oscillator with a 4-clock-per-instruction pipeline and supports both 3.3 V and 5 V operation, while exposing 20 digital I/O lines, an 8-bit timer/counter, a Watchdog Timer (WDT), Power-on Reset (POR), and brown-out detection. The narrow (12-bit) instruction set delivers roughly 2:1 code density over competing 8-bit cores in the same price class, easing firmware storage in cost-sensitive OTP designs. A microcontroller is a single-chip computer that integrates a CPU, program and data memory, I/O peripherals, and clock generation onto one silicon die. The 8-bit MCU category sits below 16-bit and 32-bit controllers in raw compute power but offers the lowest cost, the simplest toolchain, and the most mature compilers and emulators, which is why it dominates low-end embedded applications such as appliance controls, sensor interfaces, and battery-powered timing products. Within that hierarchy, PIC16C5x parts are the original EPROM-based baseline family: PIC is the architecture, 8-bit is the data width, OTP EPROM is the program memory technology, and RISC is the Harvard pipeline philosophy. Key specifications distinguishing this part include its 12-bit instruction word (vs. 14-bit for PIC16Cxx midrange and 16-bit for PIC17Cxx/18F), an instruction execution time of one oscillator cycle (i.e. 100 ns at 40 MHz), low-power LP oscillator support, and 25 mA source/sink per I/O pin which allows it to drive LEDs and small relays directly. Industrial temperature range is -40 °C to +85 °C, and the device is offered as RoHS-compliant lead-free with matte-tin plating on the SOIC wide-body package. Typical applications include low-cost consumer appliance controllers, simple battery chargers, fan/lighting controls, and any application that needs a proven, field-tested 8-bit core with small program memory, robust I/O drive strength, and very long product lifecycle support from Microchip. Because the part uses windowless OTP, it is best suited to mature production designs where field firmware updates are not required. Design considerations: ensure the POR rise-time and Vdd decoupling follow Microchip's PIC16C5x recommendations to guarantee clean startup, and select the RC vs. LP vs. XT vs. HS oscillator mode suffix when ordering. This part carries the LP (low-power) and I (industrial temperature) suffixes and ships in SO wide-body (SO) on 1,000-piece tape-and-reel.

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PIC16C55T-LPI/SS - 8-Bit 40MHz OTP MCU 28-SSOP | Microchip
PIC16C55T-LPI/SS

PIC16C55T-LPI/SS - 8-Bit 40MHz OTP MCU 28-SSOP | Microchip

The Microchip Technology PIC16C55T-LPI/SS is an 8-bit EPROM/ROM-based CMOS microcontroller from the PIC® 16C family, delivering 40 MHz core speed with 768 bytes (512 x 12) of One-Time-Programmable (OTP) program memory and 24 bytes of RAM in a 28-pin SSOP package. The "T" suffix denotes tape-and-reel packaging and the "LPI" code indicates the industrial temperature grade (LP) and low-power CMOS process. With 20 programmable I/O pins, an integrated Power-On Reset (POR) circuit, and a Watchdog Timer (WDT), the PIC16C55T targets cost-sensitive embedded control tasks that require deterministic RISC performance. The PIC® 16C microcontroller family uses a Harvard-architecture RISC CPU with a reduced 33-instruction set and 12-bit-wide instructions that deliver 2:1 code compression over competing 8-bit architectures in the same price tier. The "PIC" acronym (Peripheral Interface Controller) reflects its origins as a peripheral interface IC, and the family has become a foundational building block in embedded systems. The PIC16C5X series sits at the entry-level of the PIC16 hierarchy, offering fully static operation, low power consumption, and OTP-based code storage for low-volume production runs. Key features include 20 bidirectional digital I/O pins, on-chip Power-On Reset to initialize the device cleanly at power-up, a Watchdog Timer for runaway code recovery, and an integrated oscillator with selectable clock modes (RC, LP, XT, HS) for design flexibility. The 28-SSOP package (5.30 mm body width, 0.65 mm pitch) provides a compact footprint suitable for space-constrained PCB layouts while maintaining compatibility with standard reflow processes. Operating voltage spans 2.5V to 6.0V, enabling compatibility with both 3.3V and 5V logic rails. Typical applications include low-cost consumer appliances, automotive body controllers, industrial sensor interfaces, white-goods motor control, and battery-powered instruments where small code footprint and deterministic execution are paramount. The PIC16C55T's mature toolchain (MPLAB, MPASM) and broad third-party support make it well suited for legacy designs and maintenance of installed-base products. When designing with this device, allocate adequate decoupling (100 nF ceramic adjacent to VDD/VSS) and consider the OTP programming requirement - code must be committed during manufacturing, so development flows typically use a flash-based PIC16F5X sibling during prototyping. Pin 1 dot orientation must be verified against the SSOP notch mark during board layout. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, enabling faster component evaluation and PCB reuse decisions.

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PIC16C55T-RC/SO - 4MHz 8-bit OTP MCU 28-SOIC | Microchip
PIC16C55T-RC/SO

PIC16C55T-RC/SO - 4MHz 8-bit OTP MCU 28-SOIC | Microchip

The Microchip PIC16C55T-RC/SO is an 8-bit, fully-static RISC microcontroller from the PIC16C5x family, supplied in a 28-pin SOIC (7.50 mm / 0.295" width) package on tape and reel. The device integrates 768 bytes (512 x 12) of One-Time Programmable (OTP) program memory, 24 bytes of data RAM, and 20 digital I/O pins, and executes instructions at a 4 MHz oscillator rate. It operates from a 3.0 V to 6.25 V supply and is qualified for the commercial 0C to +70C temperature range. A microcontroller (MCU) is a single-chip computer that combines a CPU, memory, and programmable I/O peripherals. The PIC16C5x family is built on a RISC core using 33 single-word single-cycle instructions and 12-bit-wide opcodes, delivering roughly 2:1 code density advantage over competing 8-bit architectures at the time. Within the power-management IC taxonomy, MCUs sit one level above logic and below system-level SoCs, serving as the decision-making element in embedded products. Key features include Power-On Reset (POR), a Watchdog Timer (WDT) for reliable unattended operation, an internal oscillator option, and code protection for the OTP array. The Harvard-bus architecture separates program and data paths, allowing instruction fetch and operand access in the same clock cycle, which gives deterministic execution timing for real-time control loops. The 20 I/O pins can be individually configured for digital input or output, with weak pull-ups and pin-change interrupts. The 8-bit timer (TMR0) with a programmable prescaler supports event counting, delay generation, and periodic interrupts. The brown-out reset, sleep-mode current (low-power halt), and EPROM/OTP-based code storage make the part suitable for high-volume cost-sensitive products. Typical applications include consumer appliances, simple industrial controllers, automotive subsystems (non-safety), white goods user interfaces, remote controls, and sensor conditioning front-ends. The PIC16C55 family is widely deployed as a glue-replacement for discrete logic in legacy designs. When designing with this part, allocate at least one full instruction-cycle budget to interrupt latency and verify the 4 MHz RC oscillator accuracy against timing-critical peripherals such as UART or PWM outputs. The T suffix and /SO suffix denote tape-and-reel packaging in the 28-SOIC form factor.

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PIC16C55T-RC/SS - 8-Bit 4MHz OTP MCU, 768B | Microchip
PIC16C55T-RC/SS

PIC16C55T-RC/SS - 8-Bit 4MHz OTP MCU, 768B | Microchip

The Microchip Technology PIC16C55T-RC/SS is an 8-bit PIC® 16C microcontroller running at 4MHz with 768 bytes (512 x 12) of One-Time-Programmable (OTP) EPROM program memory and 24 bytes of general-purpose RAM, supplied in a 28-pin SSOP package. Designed for cost-sensitive embedded applications, it belongs to Microchip's legacy PIC16C5x family of fully static EPROM/ROM-based CMOS microcontrollers. The 'T' suffix indicates Tape & Reel packaging, 'RC' indicates the 4MHz oscillator mode, and 'SS' identifies the 28-SSOP form factor. An OTP microcontroller (One-Time-Programmable) is a class of MCU that allows the user to electrically program the on-chip program memory exactly once; the bit cells use anti-fuse or fuse-link technology that cannot be erased by UV or electrical means. OTP MCUs sit in the same hierarchy as EPROM-windowed MCUs (erasable via UV light) and Flash MCUs (re-programmable many times). The PIC16C5x family specifically uses 12-bit-wide instructions, achieving a 2:1 code compression ratio over competing 8-bit architectures in its class, which reduces overall program memory footprint. Key features include 20 bidirectional digital I/O pins, two 8-bit timer/counters, a watchdog timer, and a 4MHz maximum operating frequency with an instruction cycle time of 1µs. The wide supply voltage range of 4.5V to 5.5V supports industrial and consumer 5V rails. The PIC RISC core executes most instructions in a single cycle, delivering high throughput for the device class. Technically, the PIC16C5x architecture employs a Harvard design with separate program and data buses, and 32 bytes of register-based RAM mapped as general-purpose and special-function registers. The device is fabricated in CMOS technology, offering low power consumption suitable for battery and line-powered applications. The 28-SSOP package exposes 20 usable I/O lines via two 8-bit ports plus partial port bits. Typical applications include simple motor controls, sensor interface boards, low-end consumer appliances, LED display drivers, and educational/prototyping platforms. The 12-bit instruction set is widely documented and supported by a mature toolchain (MPASM assembler, MPLAB IDE), simplifying firmware development for engineers familiar with the PIC architecture. When designing with this device, note that OTP memory cannot be re-programmed — firmware must be fully validated in a windowed EPROM equivalent (e.g., PIC16C55-JW) before committing to the OTP version. Use the lowest available voltage variation for brown-out-sensitive designs and ensure the RC oscillator tolerance meets timing requirements. This page synthesizes distributor pricing snapshots, drop-in same-family alternatives, and practical design considerations that supplement the Microchip datasheet. Information current as of 2026-09-16.

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PIC16C55T-RCE/SS - 8-Bit OTP MCU 768B EPROM 4MHz SSOP-28
PIC16C55T-RCE/SS

PIC16C55T-RCE/SS - 8-Bit OTP MCU 768B EPROM 4MHz SSOP-28

The Microchip Technology PIC16C55T-RCE/SS is an 8-bit, fully static, EPROM/ROM-based CMOS microcontroller that delivers RISC performance at a competitive cost point. Housed in a 28-pin SSOP package and tape-and-reel packaged for high-volume assembly, the device integrates a 12-bit-wide instruction set running at 4 MHz maximum clock, 768 bytes (512 x 12) of One-Time Programmable (OTP) EPROM program memory, and 24 bytes of RAM. Designed for applications where cost and footprint matter more than flash re-programmability, it ships with 20 general-purpose I/O lines for direct digital interfacing. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, memory, and I/O peripherals into one package. The PIC16C5X family belongs to the CMOS 8-bit MCU hierarchy -> microcontroller -> embedded controller -> semiconductor IC. OTP EPROM is a variant of programmable non-volatile memory that can be written exactly once, making OTP MCUs ideal for production volumes where firmware is finalized but unit cost must remain low. Key features include a 33-instruction RISC architecture that delivers 2:1 code compression over comparable 8-bit CISC architectures, a Watchdog Timer (WDT) for fault recovery in unattended systems, and Power-on Reset (POR) that initializes the device cleanly on every power-up. The device operates across the standard industrial 3.3V and 5V supply rails, allowing flexibility in both legacy 5V systems and modern low-voltage designs. Built-in I/O structures are CMOS/TTL compatible for straightforward interfacing to logic peripherals. The PIC16C55T-RCE/SS uses a Harvard-class RISC core with a 12-bit instruction word. Only 33 single-word/single-cycle instructions are needed to program the device, reducing developer learning curve and accelerating time-to-market. With four oscillator options (RC, LP, HS, XT) selectable by part-number suffix, designers trade off cost, power, and frequency against the application's clock-precision requirements. Typical applications include appliance controllers, simple sensor interfaces, automotive body electronics, security keypads, remote-control transmitters, industrial timers, and low-cost consumer products where flash reprogrammability is unnecessary. The 28-pin SSOP footprint drops into board layouts shared with other PIC16C5X and PIC16C55A family devices, simplifying PCB reuse across product variants. A practical design tip: because PIC16C55T-RCE/SS is OTP, prototype on a windowed or flash-based equivalent (such as PIC16F or PIC18F in the same footprint) and only commit OTP ROMs for production once firmware is fully validated. Verify the oscillator suffix ("E" in this part = RC oscillator) against the actual resonator or RC network on the PCB. This page consolidates distributor pricing, drop-in PIC16C5X family alternatives, and practical design notes that are not collated on a single manufacturer datasheet page.

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PIC16C55T-RCI/SO - 8-Bit 4MHz OTP MCU 768B | 28-SOIC | Microchip
PIC16C55T-RCI/SO

PIC16C55T-RCI/SO - 8-Bit 4MHz OTP MCU 768B | 28-SOIC | Microchip

The Microchip Technology PIC16C55T-RCI/SO is an 8-bit PIC® microcontroller from the PIC16C5X family, delivering 4MHz operation with 768 bytes of One-Time Programmable (OTP) program memory (512 x 12 words), 24 bytes of RAM, and 20 I/O pins in a 28-SOIC package supplied on tape and reel. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory, volatile data RAM, and configurable I/O peripherals on one die. The PIC® 16C5X family is part of the original Microchip baseline RISC architecture, which sits at the bottom of the 8-bit MCU taxonomy: PIC16C5X -> PIC16C family -> PIC16 -> 8-bit PIC microcontrollers -> Microcontrollers -> Microcontrollers and Processors -> Semiconductor. The RISC Harvard architecture separates program and data buses for predictable single-cycle instruction execution, which simplifies timing analysis in cost-sensitive embedded designs. Key specifications of the PIC16C55T-RCI/SO include a 4MHz maximum clock rate, 768B (512 x 12) OTP program memory, 24 bytes of general-purpose RAM, 20 digital I/O pins organized into ports, an external oscillator interface, and on-chip Power-On Reset (POR) and Watchdog Timer (WDT) peripherals. The 'R' suffix indicates RC oscillator compatibility while 'C' denotes the commercial operating temperature grade and 'I' the industrial temperature range. The device operates from a 3V to 6.25V supply, supports an operating temperature range of -40°C to +85°C, and uses the well-documented PIC16C5X 12-bit instruction set. The lack of on-chip Flash or EEPROM and the 512-word program memory reflect the family's heritage as a low-cost, OTP-based replacement for fixed-logic glue functions in volume production. Typical applications include appliance control, simple sensor interfaces, RC-servo hobby drivers, low-end consumer electronics, and industrial control subsystems where deterministic behavior, low cost, and legacy code reuse outweigh the need for reprogrammability. The 28-SOIC footprint is compatible with hand-solder prototyping and high-volume SMT assembly lines. When designing with this part, designers should plan for OTP programming at the contract manufacturer and add a watchdog timer reset strategy in firmware. Note that PIC16C5X devices do not support in-system programming (ICSP) in the same way as Flash-based PICs, so a parallel programmer or production-grade gang programmer is required. Designers migrating to a Flash-based part should evaluate PIC16F54 or PIC16F57 as second-source options. This page consolidates distributor pricing, packaging details, drop-in same-package alternatives, and practical design notes for the PIC16C55T-RCI/SO that are not typically found on a single manufacturer page.

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PIC16C55T-RCI/SS - 8-Bit 4MHz OTP MCU 768B | Microchip 28-SSOP
PIC16C55T-RCI/SS

PIC16C55T-RCI/SS - 8-Bit 4MHz OTP MCU 768B | Microchip 28-SSOP

The Microchip Technology PIC16C55T-RCI/SS is an 8-bit CMOS microcontroller from the PIC16C5X family, delivering 4MHz CPU performance with 768 bytes (512 x 12) of One-Time Programmable (OTP) program memory and 24 bytes of data RAM in a 28-pin SSOP surface-mount package. The 'T' suffix denotes tape-and-reel packaging, 'RC' indicates the RC oscillator variant, 'I' marks the industrial temperature grade (-40C to +85C), and 'SS' designates the 28-SSOP 5.30mm body. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, RAM, and I/O peripherals on one die. The PIC16C5X family belongs to the baseline PIC architecture using a 12-bit instruction word with a two-stage pipeline, classified under the hypernym chain: microcontroller -> embedded processor -> microprocessor -> semiconductor IC. OTP memory allows factory programming but cannot be re-written, balancing cost against in-field reprogrammability. Key features include 20 I/O pins, an 8-bit timer/counter, watchdog timer, power-on reset, and RC oscillator support with external clock option. The device operates from 3V to 6.25V and consumes low current typical of CMOS designs. The PIC RISC architecture executes most instructions in a single cycle, providing deterministic throughput for real-time control loops. The 12-bit wide instruction word allows compact code density, and the Harvard bus keeps program and data paths separate for predictable timing. Typical applications include industrial automation controllers, consumer appliance logic replacement, automotive sub-system controllers, sensor signal conditioning front-ends, and small embedded timing/sequencing tasks. The industrial temperature range permits deployment in uncontrolled environments, and the SSOP footprint suits dense PCB layouts where DIP-28 alternatives would consume too much board area. When designing with this part, note that OTP memory requires pre-production programming; revisions cannot be field-deployed without physical replacement. The 4MHz top speed is adequate for slow control loops but limiting for any signal processing. Ensure decoupling caps of 0.1uF are placed near VDD and that unused I/O pins are configured as outputs to minimize current draw. This page synthesizes distributor pricing, drop-in 28-SSOP alternatives, and practical design notes for the PIC16C55T-RCI/SS, giving engineers a faster sourcing decision than distributor catalog pages alone.

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PIC16C55T-XT/SO - 8-bit OTP MCU, 768B EPROM, 20 I/O SOIC-28 | Microchip
PIC16C55T-XT/SO

PIC16C55T-XT/SO - 8-bit OTP MCU, 768B EPROM, 20 I/O SOIC-28 | Microchip

The Microchip PIC16C55T-XT/SO is a member of the PIC16C5X family of low-cost, high-performance 8-bit fully-static EPROM/ROM-based CMOS microcontrollers, packaged in a 28-pin SOIC ("/SO") wide-body surface-mount package. It delivers 0.75 KB (768 bytes) of program EPROM, 24 bytes of data RAM, and 20 digital I/O pins organized into three I/O ports (RA, RB, RC), driven by a RISC-style instruction set with only 33 single-word / 12-bit instructions and a 2:1 code compression advantage over typical 8-bit CISC competitors in its class. The "XT" suffix indicates a high-frequency external crystal/oscillator option up to 4 MHz; the device operates from 2.5 V to 6.25 V and is rated for the commercial 0 C to +70 C temperature range, with the "T" suffix denoting the tape-and-reel packaging variant. A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory (program + data), and peripheral I/O. Within the product hierarchy, the PIC16C5X belongs to the 8-bit MCU -> microcontroller -> embedded controller -> semiconductor family. The PIC16C5X series in particular is Microchip's original "baseline" OTP/EPROM-based MCU architecture, designed for cost-sensitive, low-to-medium complexity embedded applications where flash reprogrammability is not required, making it well-suited for high-volume consumer and industrial products. Key features include Harvard-architecture separate program and data buses, a 12-bit instruction word, a 2-level hardware stack, an 8-bit timer/counter with optional programmable prescaler, power-on reset, watchdog timer with on-chip RC oscillator, code-protection EPROM security, and CMOS technology for very low power consumption (typically < 2 mA at 5 V/4 MHz and < 20 uA in standby). The 20-mA sink/source per-pin capability (max 25 mA per pin) on the 20 I/O pins directly drives LEDs and small relays. Typical applications include remote-control transmitters, security-system sensor interfaces, appliance controllers (microwave, washing machine, thermostat), consumer-electronics toys, simple battery chargers, smoke detectors, automotive interior accessories (non-safety), and any high-volume appliance where the OTP memory's one-time-programmable cost advantage outweighs the need for in-system reprogramming. The wide SOIC-28 footprint simplifies hand-soldering and rework compared to shrink-SOIC packages. When designing with this part, verify that the OTP program memory will be burned before PCB assembly - field updates are not possible. Ensure the VDD rise time stays below the POR-specification ramp; if a slow-rising supply is unavoidable, use a power-on-reset supervisor. Decouple VDD with a 0.1 uF ceramic capacitor placed within 5 mm of the pin, and connect the OSC1/OSC2 crystal traces in short, ground-guarded paths.

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PIC16C55T-XT/SS - 8-bit 4MHz OTP MCU 768B | 28-SSOP
PIC16C55T-XT/SS

PIC16C55T-XT/SS - 8-bit 4MHz OTP MCU 768B | 28-SSOP

The Microchip Technology PIC16C55T-XT/SS is an 8-bit RISC microcontroller from the PIC16C5X family, delivering 4 MHz maximum clock speed and featuring 768 bytes of OTP program memory organized as 512 x 12 words, in a 28-pin SSOP surface-mount package. The integrated 24-byte data RAM and 20 general-purpose I/O pins make this CMOS MCU suitable for compact embedded control tasks in industrial and consumer electronics. An 8-bit OTP microcontroller is a single-chip microcomputer containing a CPU, program memory, data RAM, and peripheral I/O on one die. The OTP (One-Time Programmable) memory uses fuse/antifuse or EPROM cells that can be written once with a device programmer but cannot be electrically erased; this gives PIC16C5X parts a low-cost, low-power profile suited to high-volume production where firmware is finalized. The PIC16C5X family implements a RISC architecture with only 33 single-word/single-cycle instructions, allowing most instructions to execute in one clock cycle for deterministic throughput at low MHz. Key specifications include 4 MHz maximum operating frequency, 768 bytes (512 x 12) OTP program memory, 24 bytes of RAM, 20 I/O pins, and a 3.0V to 6.25V supply voltage range. The device uses an external XT oscillator (crystal/resonator up to 4 MHz) and operates over the commercial 0°C to 70°C temperature range. The 28-SSOP (5.30 mm width, 0.65 mm pitch) package enables high-density board layouts while remaining hand-solderable for prototype builds. The PIC16C55 architecture employs a Harvard-style separate program/data bus, with a 12-bit-wide instruction word. Peripherals include a watchdog timer, power-on reset, and a 8-bit timer/counter with optional prescaler. The 20 I/O pins support TTL/CMOS levels, with individual pin direction control. Compared to its PIC16C54 sibling, the PIC16C55 offers larger program memory (768 B vs 512 B) for applications requiring additional lookup tables or state machines. Typical applications include industrial control, appliance control, low-cost remote-control encoders, LED driver controllers, and consumer electronic toys. The wide 3.0V to 6.25V supply range and external XT oscillator support standard 4 MHz crystals used across the embedded market. When designing with this part, ensure that firmware is finalized before programming because the OTP memory cannot be re-programmed in-circuit. For development and field updates, use a Flash-based PIC16F5X variant (e.g., PIC16F57) as a development substitute on the same SSOP footprint.

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PIC16C55T-XTE/SS - 8-bit OTP MCU, 4MHz, 28-SSOP | Microchip
PIC16C55T-XTE/SS

PIC16C55T-XTE/SS - 8-bit OTP MCU, 4MHz, 28-SSOP | Microchip

The Microchip Technology PIC16C55T-XTE/SS is an 8-bit EPROM/ROM-based CMOS microcontroller delivering 4 MHz CPU performance with 768 bytes (512 x 12) of One-Time Programmable (OTP) program memory and 24 bytes of data RAM, housed in a 28-pin SSOP package. It operates from a 3.3V to 5.5V supply and features 20 general-purpose I/O pins, making it a compact solution for cost-sensitive embedded designs. A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory, data RAM, and integrated peripherals such as timers and I/O. Within the broader taxonomy, the PIC16C55 sits as: 8-bit microcontroller -> RISC microcontroller -> microcontroller -> embedded IC -> semiconductor. The PIC16C5X family specifically targets low-cost, high-volume applications where deterministic instruction execution and minimal external component count are valued over raw processing power. Key features include 33 single-word instructions, a 12-bit instruction word width yielding 2:1 code compression versus competing 8-bit architectures, a Power-on Reset (POR), a Watchdog Timer (WDT) for reliable operation, and an 8-bit real-time timer/counter. The OTP program memory is one-time programmable, suitable for volume production where firmware is finalized and code updates are not expected in the field. Architecturally, the PIC16C55 uses a Harvard-style RISC core with separate program and data buses, enabling most instructions to execute in a single instruction cycle (250 ns at 4 MHz). The CMOS process delivers low power consumption suitable for both battery-powered and line-powered equipment. The 28-SSOP footprint offers a compact 5.30 mm body width, ideal for space-constrained PCB layouts. Typical applications include consumer appliance control, simple sensor interfaces, LED display drivers, low-end remote controls, and industrial timers where the combination of low cost, deterministic timing, and Microchip's mature toolchain (MPLAB) provides a fast time-to-market. The 4 MHz clock speed is sufficient for slow human-interface tasks but not for high-speed communication protocols. When designing with this part, note that the PIC16C55 is an older EPROM-based architecture with no in-circuit debug capability. Designers should plan for a socketed programming adapter during development and verify the OTP write window with the chosen programmer. The 28-SSOP package requires careful thermal profile control during reflow soldering. This page synthesizes distributor pricing, drop-in SSOP-package alternatives, and practical design notes not found in the standalone manufacturer datasheet.

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PIC16C55T-XTI/SS - 8-Bit 4MHz OTP MCU 768B | Microchip
PIC16C55T-XTI/SS

PIC16C55T-XTI/SS - 8-Bit 4MHz OTP MCU 768B | Microchip

The Microchip Technology PIC16C55T-XTI/SS is an 8-bit RISC microcontroller from the PIC16C5X family, featuring 768 bytes (512 x 12) of One-Time Programmable (OTP) program memory, 24 bytes of RAM, and 20 general-purpose I/O pins. It operates at a maximum clock frequency of 4 MHz across a 5V supply in a 28-pin SSOP package (0.209 inch, 5.30 mm width). The 'T' suffix denotes tape-and-reel packaging, 'XT' denotes the 4 MHz oscillator variant, and 'I' indicates the industrial operating temperature range. An 8-bit microcontroller is a single-chip computer that integrates a CPU, memory (ROM/RAM), and I/O peripherals on one die. The PIC architecture specifically uses a RISC (Reduced Instruction Set Computer) design with only 33 single-word, single-cycle instructions, enabling predictable deterministic execution. 8-bit MCUs sit within the broader hierarchy: microcontroller -> embedded processor -> semiconductor, serving as the workhorse for cost-sensitive embedded control tasks where compute demands are modest. Key features include a fully static CMOS design (allowing the clock to be stopped for power saving), 12-bit wide instruction word, 8-bit data path, two hardware timers/counters (8-bit and 16-bit equivalent), watchdog timer with on-chip RC oscillator, power-on reset, and brown-out detection. The 20 I/O pins each source or sink up to 25 mA, enabling direct LED drive without external drivers. Technical depth: the PIC16C5X uses a Harvard architecture with separate instruction and data buses. The 12-bit instruction word is wider than the 8-bit data path, allowing every instruction to be a single 12-bit word accessed in one cycle. OTP memory is field-programmable but not erasable, making the device cost-optimized for volume production of stable firmware. Typical applications include consumer appliance control, HVAC thermostat logic, simple sensor signal conditioning, remote control transmitters, battery chargers, and industrial timing controllers. The wide I/O drive strength makes it suitable for relay and LED matrix drivers directly off the chip. Design consideration: when migrating to this part, verify oscillator type matches XT crystal/ceramic resonator specifications (typically 4 MHz fundamental). For in-circuit programming or firmware upgrades during development, prefer a Flash-based PIC16F equivalent. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet alone, providing engineers with a single authoritative reference.

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PIC16C56-10E/SO - 8-Bit 10MHz OTP MCU, 1.5KB | Microchip
PIC16C56-10E/SO

PIC16C56-10E/SO - 8-Bit 10MHz OTP MCU, 1.5KB | Microchip

The Microchip Technology PIC16C56-10E/SO is a member of the PIC16C5X family of low-cost, high-performance, 8-bit, fully static, EPROM/ROM-based CMOS microcontrollers. The device integrates 1.5KB (1K x 12) of One-Time Programmable (OTP) program memory, operates at a maximum clock speed of 10MHz, and is housed in an 18-pin SOIC package (0.295 inch / 7.50mm body width) rated for the extended automotive temperature grade. An 8-bit microcontroller (MCU) is a single-chip computer that combines a CPU, non-volatile program memory, volatile data memory, and configurable I/O peripherals on one die. The PIC16C5X family belongs to the broader hierarchy of microcontrollers -> embedded controllers -> semiconductor devices, and serves as the entry-level tier of the Microchip PIC16C lineage. The '16C' suffix denotes CMOS EPROM/OTP process technology, while the '5X' sub-family groups devices with 12-bit-wide instruction words optimized for code density. This combination delivers 2:1 code compression over competing 8-bit MCUs in the same price class, per the family description. Key features of the PIC16C56-10E/SO include 25 bytes of general-purpose RAM, a 12-bit instruction word, a single 8-bit timer/counter, a watchdog timer with on-chip RC oscillator, power-saving Sleep mode, and 12 I/O pins with individual direction control. The '10' suffix indicates a 10MHz maximum oscillator frequency, and the 'E' suffix denotes the extended automotive temperature range (-40C to +125C). The device is supported by the MPLAB PM3 Universal Device Programmer and the MPLAB IDE toolchain. Architecturally, the PIC16C56 uses a RISC instruction set with only 33 single-word/single-cycle instructions, a two-stage pipeline, and Harvard bus architecture separating program and data paths. The OTP program memory cannot be erased, making this part suited for low-to-medium-volume production where in-system re-programmability is not required. Engineers migrating to flash-based equivalents typically use the PIC16F506 in the same 14-pin or 18-pin SOIC footprint. Typical applications include appliance control, automotive body electronics (within the -40C to +125C window), sensor signal conditioning, LED drivers, low-cost remote controls, and battery-powered embedded subsystems. The wide operating voltage range of 2.5V to 6.0V and ultra-low Sleep current make it a strong fit for power-constrained designs. When designing with the PIC16C56-10E/SO, note that OTP memory is one-time programmable - firmware bugs cannot be fixed in the field. For prototyping or field-updatable designs, choose the PIC16F506 flash variant instead. The 18-SOIC package follows JEDEC MS-013 outline and reflow-solders at standard 245C peak profiles. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the standalone manufacturer datasheet, enabling faster BOM decisions.

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PIC16C56-10E/SS - 8-bit 10MHz OTP MCU 1.5KB | Microchip
PIC16C56-10E/SS

PIC16C56-10E/SS - 8-bit 10MHz OTP MCU 1.5KB | Microchip

The Microchip Technology PIC16C56-10E/SS is an 8-bit RISC microcontroller from the PIC® 16C family operating at a 10 MHz core clock speed, packaged in a 20-pin SSOP (Shrink Small Outline Package). It integrates 1.5 KB of OTP (One-Time Programmable) program memory organized as 1K x 12 bits, 25 bytes of data RAM, and 12 general-purpose digital I/O pins. The -10E suffix indicates the 10 MHz speed grade with the Extended (E) temperature range, making it suitable for automotive and industrial environments where operating temperatures extend beyond the commercial window. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, non-volatile program memory, working RAM, and programmable I/O peripherals on one silicon die. Within the broader taxonomy, the PIC16C56 belongs to the PIC16C family of classic OTP-based 8-bit MCUs, which sits beneath mid-range microcontrollers, microcontrollers, embedded processors, and finally semiconductors. The 16C line was Microchip's original OTP mid-range family, predecessor to today's flash-based PIC16F series, and remains in production for long-lifecycle and cost-sensitive applications where re-programmability is not required. Key features of the PIC16C56-10E/SS include a Harvard RISC architecture with 33 single-word instructions, a 12-bit instruction word for 2:1 code compression over typical 8-bit MCUs, power-on reset (POR), brown-out detection, watchdog timer (WDT) with on-chip RC oscillator, and an operating voltage range typically of 3.0 V to 6.0 V. The 12-bit instruction width enables compact code density, reducing program-memory consumption for small embedded tasks. Typical applications include automotive body controllers, sensor interface nodes, low-end remote controls, simple appliance controls, battery-powered instrumentation, and industrial logic replacements. Because the device uses OTP memory, it is intended for high-volume, fixed-function products rather than development or field-upgradable firmware. When designing with this part, verify that the OTP-programmed image is final before mask production; in-circuit reprogramming is not possible. Consider the modern flash-based PIC16F counterpart for prototyping, then migrate to the PIC16C56 once the firmware is frozen. This page synthesizes distributor pricing for PIC16C56-10E/SS, Microchip same-family drop-in alternatives, cross-brand pin-compatible PIC16C5x references, application examples, and design notes that go beyond the data sheet abstract.

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PIC16C56-10I/SO - 8-bit CMOS MCU, 1KB EPROM, 10MHz | Microchip
PIC16C56-10I/SO

PIC16C56-10I/SO - 8-bit CMOS MCU, 1KB EPROM, 10MHz | Microchip

The Microchip PIC16C56-10I/SO is a member of the PIC16C5X family of low-cost, high-performance 8-bit fully-static EPROM-based CMOS microcontrollers. It integrates a 12-bit-wide instruction word, an 8-bit-wide data path, 1KB of EPROM program memory, 25 bytes of RAM, and 12 I/O pins in an 18-pin SOIC wide-body package. The device operates from a single 5V supply and supports a maximum clock frequency of 10 MHz with the -10 speed grade, delivering approximately 5 MIPS of instruction throughput. What is a PIC16C5X microcontroller? The PIC16C5X is Microchip's foundational mid-range 8-bit RISC microcontroller family, sitting within the broader PIC16 family -> PIC microcontroller -> 8-bit MCU -> microcontroller (MCU) -> embedded processor hierarchy. These devices feature a Harvard architecture with separate program and data buses, a small two-level hardware stack, and direct/indirect/relative addressing modes. They are EPROM (one-time-programmable) based, designed for cost-sensitive high-volume applications where flash reprogrammability is not required. Key specifications include seven or eight special-function hardware registers, a two-level-deep hardware stack, an 8-bit real-time clock/counter (TMR0) with 8-bit prescaler, and a watchdog timer for reliable unattended operation. The device offers industrial temperature range operation (-40C to +85C, indicated by the 'I' suffix) and is housed in a 300-mil wide-body SOIC-18 (SO) package suitable for surface-mount assembly. Architecturally, the PIC16C56-10I/SO uses CMOS technology for low power consumption, supports power-saving SLEEP mode, and includes a programmable code-protection bit. Its RISC instruction set consists of 33 single-word single-cycle instructions, achieving 2:1 code compression over comparable 8-bit CISC microcontrollers and reducing overall program memory footprint. Typical applications include appliance controls, automotive sensor interfaces (sub-systems), LED lighting controllers, security-system keypad scanners, and remote-control transmitters. The -10I variant with industrial temperature grade and SOIC packaging is well suited for harsh-environment commercial and industrial embedded designs. A key design consideration is that the PIC16C5X family uses EPROM (not Flash), so firmware must be committed before final packaging. The /RESET and oscillator pins require careful PCB layout, and decoupling capacitors must be placed close to VDD/VSS to suppress switching noise. This page synthesizes distributor inventory, lifecycle status, drop-in same-family alternatives, and practical design notes not consolidated on the manufacturer product page.

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PIC16C56-10I/SS - 8-bit CMOS MCU, 1.5KB, 12 I/O, SSOP-20 | Microchip
PIC16C56-10I/SS

PIC16C56-10I/SS - 8-bit CMOS MCU, 1.5KB, 12 I/O, SSOP-20 | Microchip

The Microchip Technology PIC16C56-10I/SS is an 8-bit RISC CMOS microcontroller from the PIC16C5X baseline family, offering 1.5 KB of one-time programmable (OTP) program memory, 25 bytes of RAM, and 12 bidirectional I/O pins in a 20-pin SSOP (Shrink Small Outline Package). The "-10" suffix denotes a 10 MHz maximum clock input, which combined with the 200 ns single-cycle instruction execution delivers up to 5 MIPS of throughput, while the "I" temperature grade specifies an industrial -40C to +85C operating range. A baseline PIC microcontroller is an 8-bit RISC MCU built around a small, fixed instruction set (typically 33 single-word instructions) and a two-stage pipeline. Within the broader taxonomy, a PIC16C5X sits between simpler PIC10/PIC12 devices and the mid-range PIC16F1 family, sharing the foundational Harvard architecture (separate program and data buses) but predating the flash-based mid-range parts. Engineers choose this class for cost-sensitive, deterministic control loops where the OTP memory and limited peripherals are acceptable trade-offs. Key features include an 8-bit timer/counter (TMR0) with an 8-bit prescaler, a two-level deep hardware stack for subroutines, direct/indirect/relative addressing modes, and a high-performance RISC CPU supporting all single-cycle instructions except program branches, which require two cycles. Power consumption is reduced through CMOS fabrication, and the device supports a wide 2.5V to 6.0V VDD range for flexible system integration. The PIC16C56-10I/SS uses a Harvard architecture with a 12-bit program memory bus and an 8-bit data path, giving roughly 2:1 code compression versus competitive 8-bit MCUs in its price class. The OTP EPROM program memory requires a one-time programming step with an MPLAB-compatible device programmer such as the MPLAB PM3, and the part is suited to mature, stable code that does not need in-field firmware updates. Typical applications include simple consumer appliances, sensor interface controllers, LED driving boards, replacement of discrete logic, low-end remote controls, and industrial timing modules. The SSOP-20 footprint is also friendly to space-constrained PCB designs. When designing with the PIC16C56-10I/SS, verify that the MCLR, OSC1/OSC2, and VDD/VSS pin assignments match the chosen clock topology (RC, XT, LP, or HS oscillator). For automotive or extended-temperature requirements, source a part with an "E" temperature grade and confirm the latest Microchip product change notifications, since PIC16C OTP parts have undergone lifecycle transitions as flash-based baselines replaced them. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, helping sourcing engineers and PCB designers make a faster, more confident decision.

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