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PIC16C432-I/P - 8-Bit 20MHz OTP MCU with LIN Transceiver | Microchip
PIC16C432-I/P

PIC16C432-I/P - 8-Bit 20MHz OTP MCU with LIN Transceiver | Microchip

The Microchip Technology PIC16C432-I/P is an 8-bit CMOS microcontroller operating at 20 MHz, featuring 3.5 KB (2K x 14) of One-Time Programmable (OTP) program memory and 128 bytes of RAM, housed in a 20-pin PDIP package. It is part of the PIC® 16C family of fully-static microcontrollers with an integrated LIN (Local Interconnect Network) transceiver, originally designed for automotive body electronics networking. An 8-bit microcontroller (MCU) is a single-chip computer containing a CPU, program memory (ROM/OTP/Flash), working RAM, I/O peripherals, and timers on one silicon die. PIC16C-series MCUs use Microchip's RISC Harvard-architecture core with a small instruction set (35 instructions in this case), enabling compact code and predictable execution timing. The hierarchy is: 8-bit MCU -> microcontroller -> embedded processor -> semiconductor IC. The PIC16C432 sits in the mid-range PIC® family (PIC16C5x is base; PIC16C6x/7x/8x/9x are mid-range). Key features include 12 I/O pins, one 8-bit timer/counter with an 8-bit programmable prescaler, two analog comparators with a programmable on-chip voltage reference module, and an integrated LIN transceiver for single-wire automotive networking. The 200 ns instruction cycle at 20 MHz oscillator yields a 5 MIPS peak throughput. Code compression of approximately 2:1 over competing 8-bit MCUs reduces program-memory pressure for the 2K-word OTP array. Typical applications include automotive body-control modules (door locks, window lifters, mirror controllers, seat adjusters), LIN slave nodes, HVAC panel controls, lighting controllers, low-end instrument-cluster sub-modules, and any 12 V automotive application that previously required a discrete LIN transceiver plus MCU. When designing with PIC16C432-I/P, note that the 'C' (CMOS/OTP) variants are intended for prototype and low-volume production; for high-volume programs migrate to PIC16F432-I/P (Flash, reprogrammable). Ensure the LIN bus master provides the dominant-recessive arbitration; this part is intended as a LIN slave responder. The 20-pin PDIP footprint eases hand-soldering and breadboarding. This page synthesizes distributor pricing, parametric drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone. Pricing reflects market conditions as of 2026-09-16.

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PIC16C432T-I/SS - 8-Bit OTP MCU + LIN Transceiver | 20-SSOP
PIC16C432T-I/SS

PIC16C432T-I/SS - 8-Bit OTP MCU + LIN Transceiver | 20-SSOP

The Microchip Technology PIC16C432T-I/SS is an 8-bit PIC microcontroller with an integrated LIN bus transceiver, packaged in a 20-pin SSOP. It delivers 20 MHz CPU performance with 3.5 KB (2K x 14) of One-Time Programmable (OTP) program memory, 128 bytes of RAM, and 12 digital I/O pins. The device operates from 3.0 V to 5.5 V and is built on a fully-static CMOS process that supports a 200 ns single-cycle instruction execution. A microcontroller (MCU) is a single-chip computer containing a CPU core, non-volatile program memory, working RAM, and configurable peripheral blocks. Within the embedded hierarchy, the PIC16C432 sits in the 8-bit mid-range PIC family, above 6-/8-pin baseline PIC10/PIC12 devices but below the 16-bit dsPIC/PIC24 and 32-bit PIC32 families. The integrated LIN (Local Interconnect Network) transceiver places this MCU in the automotive body-electronics tier, where it bridges low-speed in-vehicle networks without requiring an external transceiver IC. Key features of the PIC16C432 include an integrated LIN transceiver compliant with LIN 1.2/1.3 physical layer requirements, a 35-instruction RISC core with single-cycle execution (200 ns at 20 MHz, branches two-cycle), a programmable watchdog timer, a 10-bit analog-to-digital converter, and two analog comparators. It also offers an internal 4 MHz RC oscillator and an external oscillator option for greater timing accuracy. Architecturally, the device combines a Harvard-style RISC engine, an OTP program store, and an on-die LIN physical layer, reducing BOM count versus discrete MCU-plus-transceiver designs. The CMOS process yields low quiescent current suitable for battery-connected automotive nodes. The 20-SSOP footprint measures 5.30 mm wide (0.209 inch) and 7.20 mm long, easing integration into space-constrained body modules. Typical applications include automotive LIN slaves (door modules, seat controllers, mirror switches, HVAC dampers), body-electronics sensor nodes, industrial keypad/wheel interfaces, and low-cost appliance control. The on-chip LIN transceiver removes the need for an external TJA1020 or MC33660, lowering BOM cost and PCB area. When designing with this part, note that OTP memory cannot be reprogrammed in-circuit; for prototypes requiring firmware iteration, consider the PIC16F432 (Flash) sibling or windowed CERDIP PIC16C432 for UV erasure. The industrial (-40 C to +85 C) temperature grade suits most passenger-compartment body electronics but not under-hood applications.

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PIC16C433T-I/SO - 8-bit PIC MCU 10MHz 3.5KB OTP 18-SOIC | Microchip
PIC16C433T-I/SO

PIC16C433T-I/SO - 8-bit PIC MCU 10MHz 3.5KB OTP 18-SOIC | Microchip

The Microchip PIC16C433T-I/SO is an 8-bit PIC16 family microcontroller built on Microchip's OTP (One-Time-Programmable) EPROM process, packaged in a 18-pin SOIC (SO-18) and shipping on tape-and-reel. It integrates 3.5 KB of program memory (2K x 14 words) and 128 bytes of data RAM, executes instructions at up to 10 MHz, and supports the standard PIC mid-range instruction set. The /SO package is the wide-body 300-mil SOIC variant (7.50 mm body width). A PIC16 microcontroller is a Harvard-architecture RISC device: separate program and data buses, a small fixed instruction set, and most instructions executing in a single oscillator cycle. PIC16C-series parts use EPROM/OTP program memory, meaning the device can be programmed once at production time and the code is permanently retained, which suits low-cost, high-volume consumer and appliance designs where flash re-programmability is not required. The C-class PIC16 is positioned below the F-class (Flash) siblings in the same family tree (PIC16 -> PIC mid-range -> 8-bit MCU -> microcontroller). Key features include 10 MHz maximum operating frequency, 128 bytes of RAM, 5 I/O pins (PIC16C433 exposes a 6-pin I/O set per the family, but in this /SO variant 5 are bonded out), internal oscillator support, 5V typical operation, and an instruction set fully compatible with the broader PIC16 mid-range family. The OTP EPROM die is mature and well-characterized, making the part suitable for legacy industrial controllers and cost-down retrofits of older designs. PIC16C433 belongs to the PIC16C4x sub-family of mid-range microcontrollers. Architecturally it shares the same core as PIC16C54/55/56/57/58 devices, with extended program memory addressing to reach 2K x 14 of code space. The on-chip peripherals are intentionally minimal - this is a low-I/O-count, low-cost device aimed at simple digital control tasks. Power consumption is typical for the OTP EPROM process node. Typical applications include simple timer/replacement logic, low-cost consumer appliance controls, toys and educational boards, sensor-signal processing front-ends, motor-control signal generators, and any application where a one-time-programmed 8-bit MCU with a small code footprint is acceptable. The 18-SOIC form factor makes it well-suited for through-hole-style PCBs converted to surface-mount, or for retrofit boards that require the SO-18 footprint. When designing with this device, note that OTP means field upgrades are impossible - firmware must be finalized before programming. Always provide adequate Vdd decoupling (100 nF + bulk) close to the IC, and respect the oscillator start-up time when MCLR reset is released. This page synthesizes distributor pricing, drop-in alternative pinouts, and practical design notes not present in the standalone manufacturer datasheet, including cross-references to the /SO and /P variants.

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PIC16C505-04/P - 8-Bit 4MHz OTP MCU, 1.5KB, 12 I/O | Microchip
PIC16C505-04/P

PIC16C505-04/P - 8-Bit 4MHz OTP MCU, 1.5KB, 12 I/O | Microchip

The Microchip Technology PIC16C505-04/P is an 8-bit CMOS OTP microcontroller delivering 4 MIPS performance (200 ns instruction cycle) in a 14-pin PDIP through-hole package. It integrates 1.5 KB of EPROM program memory (1K x 12 wide), 72 bytes of RAM, and 12 digital I/O pins. A microcontroller (MCU) is a single-chip computer that combines a CPU core, program memory, data RAM, and programmable I/O peripherals. Within the broader taxonomy, the PIC16C505 sits in the 8-bit RISC MCU class, descended from the original PIC® (Peripheral Interface Controller) architecture introduced by General Instruments and commercialized by Microchip. It belongs to the enhanced PIC16 mid-range family, which uses a Harvard architecture with separate program and data buses and a small RISC instruction set optimized for deterministic real-time control. PIC16C-series parts are OTP (One-Time-Programmable) EPROM-based, distinguishing them from the Flash-based PIC16F series. The device features a 12-bit instruction word, 33 single-word/single-cycle instructions, a hardware 8-bit timer/counter (TMR0) with an 8-bit prescaler, watchdog timer with its own on-chip RC oscillator, programmable code protection, power-on reset, power-saving SLEEP mode, and a 4 MHz internal/external clock input option. The '04' speed grade specifies a 4 MHz maximum oscillator input. Architecturally, the PIC16C505 uses an 8-level deep hardware stack, two I/O ports (PORTB 8 bits and PORTC limited), and an internal RC oscillator that reduces external component count. The 14-pin PDIP package provides 12 usable I/O pins after dedicating one pin to VDD, one to VSS, and one to MCLR/VPP. Typical applications include low-cost consumer appliance control, sensor signal conditioning, LED driving and lighting controllers, battery chargers, small home appliances, automotive body electronics subsystems, and replacement of discrete logic ICs in legacy designs. Its small footprint, low price, and ease of programming (33-instruction set) make it a frequent choice for simple state-machine and timing-control tasks. Designers should note that the OTP variant cannot be reprogrammed in-circuit; engineering samples should use the PIC16F505 flash equivalent for iterative development. Code-protect bits should be verified before final production programming to prevent unauthorized memory reads. This page synthesizes distributor pricing, pin-compatible alternatives, and practical design guidance drawn from the PIC16C505 datasheet and reference manuals.

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PIC16C505-04/SL - 8-Bit 4MHz OTP MCU 1.5KB | Microchip
PIC16C505-04/SL

PIC16C505-04/SL - 8-Bit 4MHz OTP MCU 1.5KB | Microchip

The Microchip Technology PIC16C505-04/SL is an 8-bit CMOS OTP (One-Time Programmable) microcontroller from the PIC16C5x family, delivering 4 MIPS performance through a 4 MHz maximum clock and 200 ns instruction cycle in a 14-pin SOIC package. The device integrates 1.5 KB (1K x 12) of OTP program memory and 72 bytes of data RAM, providing 12 digital I/O pins suitable for compact embedded control applications. A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory, and programmable I/O peripherals on one IC. The PIC16C5x family belongs to the PIC16 mid-range 8-bit microcontroller architecture, sitting hierarchically under the broader PIC microcontroller family, which itself falls under Microchip's embedded controller and 8-bit MCU product lines. 8-bit OTP microcontrollers like the PIC16C505 are commonly used in cost-sensitive, low-volume, or fixed-function applications where program memory is programmed once at production and the code never needs updating. Key features include 33 single-word single-cycle instructions enabling compact code density (typically 2:1 over competing 8-bit MCUs), a 5-channel 8-bit A/D converter absent on this variant (digital-only I/O), and an on-chip watchdog timer with its own dedicated RC oscillator for reliable operation independent of the system clock. The PIC16C505 includes In-Circuit Serial Programming (ICSP), Power-on Reset (POR), Device Reset Timer (DRT), and a programmable code-protection mechanism for IP security. Its RISC architecture and Harvard bus design separate program and data memory paths, allowing instruction fetch and operand access to occur in the same cycle. Typical applications include low-cost consumer appliances, remote controls, sensor interface front-ends, LED driver controllers, battery-powered toys, and simple industrial timer/counter modules. The wide 2.5V to 5.5V operating range supports both 3.3V and 5V system designs, and 12 I/O pins provide enough headroom for keypad scanning, display multiplexing, and serial-bit-banged communication. When designing with this device, observe that the OTP memory cannot be re-programmed - choose this part for production-fixed code, or evaluate the flash-based PIC16F505 for development/field-upgradable designs. The PIC16C505 is a member of the legacy PIC16C5x family; for new designs, Microchip generally recommends the PIC16F505 (flash) or PIC10/12F successor families.

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PIC16C505-04E/SL - 8-Bit 4MHz OTP MCU, 1.5KB | Microchip
PIC16C505-04E/SL

PIC16C505-04E/SL - 8-Bit 4MHz OTP MCU, 1.5KB | Microchip

The Microchip Technology PIC16C505-04E/SL is a 14-pin 8-bit CMOS microcontroller based on the PIC16C5x architecture with 1.5KB (1K x 12) of One-Time-Programmable (OTP) program memory, 72 bytes of RAM, and 12 digital I/O pins. The device executes instructions in a 200 ns instruction cycle at 4 MHz oscillator input, drawing typical operating current in the low milliamp range from a 2.5 V to 5.5 V supply. It is housed in a 14-pin SOIC package (SL = SOIC-150, 3.90 mm body width) and is specified for the extended industrial temperature range of -40C to +125C. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory (ROM/Flash/OTP), working RAM, and peripheral I/O into one package. Within the broader semiconductor taxonomy, an MCU belongs to the logic IC / microcontroller category, which sits below microprocessors and above discrete digital logic in capability. The PIC16C505 specifically belongs to the PIC16C5x baseline OTP family - a cost-optimized lineage used where low pin count, deterministic instruction timing, and OTP-based code storage are acceptable. Key features include 33 single-word instructions, a hardware RESET input, a watchdog timer, an 8-bit real-time clock/counter with 8-bit prescaler, and four interrupt sources. The OTP program memory enables low-cost prototyping and low-to-mid volume production runs, while the CMOS process delivers low quiescent current typical of battery-powered applications. The 14-pin SOIC footprint keeps board area minimal while leaving 12 lines free for digital I/O after power, ground, and RESET are allocated. Architecturally, the PIC16C505 uses a Harvard-style RISC core with a separate 12-bit instruction word and 8-bit data path. The 4 MHz oscillator produces a 1 MHz instruction rate (4:1 internal divider) yielding a 1 microsecond instruction cycle, suitable for tight control loops and deterministic timing. The integrated watchdog timer and power-on reset reduce external component count. Typical applications include low-cost appliance control, sensor signal conditioning front ends, LED lighting controllers, battery chargers, and simple user-interface boards. The extended temperature grade makes it suitable for automotive under-hood subsystems and industrial machine controllers where commercial-grade parts would otherwise be inadequate. When designing with this part, allocate VDD/VSS decoupling with a 100 nF ceramic capacitor placed within 5 mm of the device, and provide an RC delay or proper MCLR pull-up to ensure clean POR behavior. OTP memory cannot be erased, so plan for code-stable volume runs or use the PIC16F505 flash variant for development and field updates. This page consolidates distributor pricing, drop-in alternatives, application examples, and design notes not found in the standalone manufacturer datasheet, enabling engineers to evaluate the PIC16C505-04E/SL for new designs and legacy board replacements.

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PIC16C505-04I/SL - 8-Bit 4MHz OTP MCU, 1.5KB, 12 I/O | Microchip
PIC16C505-04I/SL

PIC16C505-04I/SL - 8-Bit 4MHz OTP MCU, 1.5KB, 12 I/O | Microchip

The Microchip Technology PIC16C505-04I/SL is a low-cost, high-performance 8-bit fully-static EPROM/ROM-based CMOS microcontroller delivering 4 MHz (200 ns instruction cycle) performance with 1.5 KB (1K x 12) of One-Time-Programmable (OTP) program memory and 72 bytes of RAM, housed in a 14-pin SOIC (SL) package. It features 12 digital I/O pins, an 8-bit timer/counter, and operates across the industrial temperature range of -40C to +85C. What is an OTP microcontroller? An OTP (One-Time-Programmable) microcontroller is a class of MCU whose program memory is implemented using EPROM cells that can be written exactly once during production or field programming, then cannot be erased. OTP MCUs sit in the hierarchy: microcontroller -> embedded processor -> semiconductor IC. They offer lower per-unit cost than flash-based MCUs and are commonly used in high-volume, code-stable consumer and industrial products where in-field firmware updates are not required. Key features include the PIC16C5x baseline RISC architecture with only 33 single-word/single-cycle instructions, providing typical 2:1 code compression over competing 8-bit MCUs. The device supports 8-bit-wide data paths, hardware stack, and direct/indirect addressing modes. An internal RC oscillator option reduces BOM cost, while the Watchdog Timer (WDT) and Power-on Reset (POR) enhance field reliability. The industrial-grade (-40C to +85C) operating range supports harsh-environment deployments. The PIC16C505-04I/SL employs a Harvard-architecture RISC core that executes one instruction per clock cycle (except branches), achieving 200 ns instruction time at 4 MHz. The 12-bit instruction word is symmetric, simplifying code generation. Internal peripherals are mapped to a compact register file, and the device supports in-circuit serial programming (ICSP) via RB6/RB7 pins for production-line code loading. Typical applications include low-cost consumer appliances, small industrial control modules, sensor signal conditioning front-ends, simple LED driving controllers, remote control transmitters, and replacement of discrete logic in cost-sensitive embedded designs. The 14-pin SOIC footprint is widely accepted in through-hole-style surface-mount assembly, simplifying PCB layout for legacy upgrades. When designing with the PIC16C505-04I/SL, remember that OTP memory cannot be re-programmed; prototype using the PIC16F505 (Flash-based) variant and migrate to the PIC16C505 for production cost savings. Ensure RB6/RB7 are accessible for in-circuit serial programming during manufacturing, and budget decoupling capacitors per the datasheet typical application circuit. This page synthesizes distributor pricing, drop-in compatible alternatives from the same PIC16C5x family, and practical design notes not found in the manufacturer datasheet alone.

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PIC16C505-20E/P - 8-Bit 20MHz 1.5KB OTP MCU | 14-PDIP | Microchip
PIC16C505-20E/P

PIC16C505-20E/P - 8-Bit 20MHz 1.5KB OTP MCU | 14-PDIP | Microchip

The Microchip Technology PIC16C505-20E/P is a 14-pin, 8-bit CMOS OTP microcontroller from the PIC16C5X family running at 20 MHz instruction execution (200 ns per instruction), with 1.5 KB of one-time-programmable program memory (1K x 12) and 72 bytes of general-purpose RAM. Packaged in a 14-pin PDIP (0.300"/7.62 mm) for through-hole assembly, it operates over the extended -40C to +125C automotive temperature range, indicated by the -E suffix in the part number. What is a PIC16C5X microcontroller? It is Microchip's original baseline PIC architecture using a 12-bit instruction word and a RISC instruction set of only 33 single-word instructions, packaged in 14 to 28 pins for ultra-low-cost embedded control. The 'C' suffix denotes CMOS EPROM/OTP program memory; later 'F' variants use flash memory. Within the broader taxonomy, the PIC16C505 sits at: PIC16C505 -> PIC16C5X family -> PIC16 -> 8-bit PIC MCU -> Microcontroller -> Integrated Circuit. Key features include 200 ns instruction execution, 2:1 code compression versus typical 8-bit competitors, a watchdog timer with on-chip RC oscillator, power-on reset, power-saving SLEEP mode, and a wide operating voltage range from 2.5V to 5.5V. The 14-pin DIP package exposes 12 I/O pins, a MCLR reset pin, and two power pins, supporting through-hole prototyping and legacy industrial designs. Compared to PIC16F5X flash variants, the OTP 'C' version offers lower unit cost in volume and is well-suited to mature production programs. The PIC16C505 uses a Harvard architecture with separate program and data buses, allowing an instruction fetch to overlap with data access. Internal peripherals include a programmable 8-bit prescaler feeding the watchdog timer, an 8-bit RTCC timer/counter, and a software-configurable oscillator that supports external RC, external crystal, and internal RC modes. With 1.5 KB of program memory holding approximately 1024 instructions, firmware development uses the standard PIC16C5X assembly toolchain or Hi-Tech C compiler, with debug support through Microchip's MPLAB ICE and ICD tools. Typical applications include appliance control, automotive body modules, sensor signal conditioning, remote-control transmitters, security keypads, and any cost-sensitive embedded product that benefits from a small-pin-count OTP MCU. The extended -40C to +125C temperature grade supports under-hood automotive and outdoor industrial environments. When designing with the PIC16C505, plan for OTP programming: code is finalized before production programming and cannot be updated. For prototype work or field-upgradable firmware, consider the flash-based PIC16F505 in the same 14-pin DIP footprint, which is pin-to-pin compatible. This page synthesizes distributor pricing, pin-compatible alternatives, and practical design notes not found in the manufacturer datasheet alone.

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PIC16C505-20I/P - 8-bit OTP MCU, 1.5KB, 12 I/O, 20MHz | Microchip
PIC16C505-20I/P

PIC16C505-20I/P - 8-bit OTP MCU, 1.5KB, 12 I/O, 20MHz | Microchip

The Microchip Technology PIC16C505-20I/P is an 8-bit RISC CMOS microcontroller built on Microchip's PIC16 architecture and packaged in a 14-pin PDIP (Plastic DIP, 0.300"/7.62 mm) with through-hole leads. It integrates 1.5 KB (1K x 12) of One-Time Programmable (OTP) program memory, 72 bytes of data RAM, 11 general-purpose digital I/O lines, and runs at a maximum clock speed of 20 MHz. The "20" speed suffix indicates a 20 MHz oscillator domain and a 200 ns instruction cycle, while the "I" suffix designates the industrial temperature range of -40°C to +85°C. A microcontroller (MCU) is a single-chip computer that combines a CPU core, program memory, working RAM, I/O peripherals and interrupt/timer subsystems on one die. The PIC16 family belongs to the 8-bit microcontroller class, sitting below 16-bit and 32-bit MCUs in compute density but offering the lowest cost, simplest toolchain, and smallest footprint for embedded control tasks. PIC16C505 specifically targets cost-sensitive, deterministic control loops where 33 single-word instructions and a 12-bit-wide opcode are sufficient. Key features of the PIC16C505-20I/P include an internal oscillator, a Watchdog Timer (WDT) backed by a dedicated on-chip RC oscillator for reliable operation, a Device Reset Timer (DRT), Power-on Reset (POR), and In-Circuit Serial Programming (ICSP) that lets you re-flash the OTP part in place. The 12-bit instruction width yields roughly 2:1 code compression versus competing 8-bit MCUs, which lets many applications fit inside the 1 K-word OTP budget. Architecturally, the part uses a Harvard-style bus with separate program and data paths, a 2-level hardware stack, and 8-bit-wide register file operations. The 20 MHz oscillator combined with a 4-cycle-per-instruction core produces 5 MIPS sustained throughput, more than enough for sensor polling, relay/keypad scanning, and simple PWM or timing tasks. Brown-out and power-on reset are managed internally, reducing external component count. Typical applications include white-goods and appliance control, low-end remote-control transmitters, battery chargers with discrete analog front-ends, HVAC damper/valve actuators, simple sensor interfaces, and replacement of discrete logic in legacy industrial boards. The 14-pin PDIP form factor is convenient for prototyping, hobby projects, and through-hole assembly lines. When designing with this part, keep VDD between 3.0 V and 5.5 V and respect the industrial temperature window. Choose the PIC16F505-I/P if you need Flash memory for re-programming during development, or PIC16C505-04I/P if your design only needs 4 MHz. This page consolidates distributor pricing, drop-in alternatives, and practical design notes that are not found in the manufacturer datasheet alone.

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PIC16C505/JW - 8-Bit 20MHz EPROM MCU 1.5KB | Microchip
PIC16C505/JW

PIC16C505/JW - 8-Bit 20MHz EPROM MCU 1.5KB | Microchip

The Microchip PIC16C505/JW is an 8-bit CMOS RISC microcontroller with 1.5KB (1K x 12) of UV-erasable EPROM program memory, 72 bytes of RAM, and a 14-pin ceramic DIP (CDIP) windowed package. It executes instructions in a 200 ns cycle at 20 MHz and supports a 2.5V/3.3V/5V operating range, making it suitable for development, prototyping, and field-reprogrammable applications where code iteration is required. A microcontroller is a single-chip computer that integrates a CPU, memory, and programmable I/O peripherals. The PIC16C505 belongs to the PIC (Peripheral Interface Controller) family, specifically the PIC16 sub-family, which sits within the broader 8-bit RISC microcontroller category and the embedded-system semiconductor hierarchy. Its 12-bit-wide instruction word and Harvard architecture deliver ~2:1 code compression versus typical 8-bit CISC competitors, allowing compact firmware in small program-memory footprints. Key features of the PIC16C505/JW include: 33 single-word/single-cycle instructions, an integrated 4 MHz internal RC oscillator (with external oscillator support up to 20 MHz), 12 I/O pins, a watchdog timer with on-chip RC oscillator, power-on reset, power-saving Sleep mode, and 8-bit timer/counter with prescaler. The /JW suffix denotes a ceramic DIP package with an erasure window, supporting UV-erase for iterative firmware development rather than the plastic OTP variants. The device uses CMOS EPROM-based memory (windowed for erasure), a 12-bit instruction word, and an 8-bit data path. Its wide operating voltage (2.5V-5.5V) and low power consumption allow battery-backed or unregulated-supply designs. The EPROM-based UV-erasable memory cell supports hundreds of erase/write cycles, making it well-suited to engineering development where firmware is repeatedly revised. Typical applications include industrial control logic, sensor signal conditioning, low-cost consumer appliances, hobby/educational microcontroller platforms, prototyping replacements for masked-ROM devices, and any design that benefits from a 14-pin through-hole windowed MCU for in-house reprogramming. The /JW package specifically enables UV erasure so the same silicon can be reused across firmware revisions. When designing with this device, ensure the UV-erase window remains covered with opaque tape during normal operation to prevent accidental data loss from ambient light. Note that the JW windowed package is intended primarily for development; production builds typically migrate to PIC16F505 (Flash) or PIC16C505-OTP variants for lower cost and no erasure-window handling. This page synthesizes distributor pricing, parametric alternatives, and practical design notes not found in the manufacturer datasheet.

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PIC16C505T-04E/SL - 4MHz 8-bit OTP MCU, 1.5KB EPROM | Microchip
PIC16C505T-04E/SL

PIC16C505T-04E/SL - 4MHz 8-bit OTP MCU, 1.5KB EPROM | Microchip

The Microchip Technology PIC16C505T-04E/SL is a low-cost, high-performance, 8-bit, fully static, EPROM/ROM-based CMOS microcontroller housed in a 14-pin SOIC (SL) package supplied on tape-and-reel. The part runs at up to 4 MHz instruction-clock speed (200 ns instruction cycle), integrates 1.5 KB of EPROM program memory organized as 1K x 12 words, and provides 72 bytes of RAM plus 11 digital I/O lines. An 8-bit microcontroller (MCU) is a small, self-contained computing element built around an 8-bit data path, on-chip program and data memory, peripherals, and a CPU core. It sits within the broader taxonomy of embedded microcontrollers -> microcontrollers and processors -> integrated circuits -> semiconductors. The PIC16C505 belongs to Microchip's mid-range PIC10/12/16 architecture family, which uses a RISC instruction set of only 33 single-word instructions and Harvard memory architecture with separate program and data buses. Key features of this device include single-cycle execution on 31 instructions (200 ns at 4 MHz), two-cycle branches, a wide operating voltage range of 2.5V to 5.5V, an integrated power-on reset (POR) and brown-out detector, a watchdog timer, an 8-bit real-time clock/counter with 8-bit prescaler, and four interrupt sources. The EPROM program memory is one-time-programmable (OTP) and the device is rated for the industrial -40C to +125C operating range, designated by the "E" suffix in the part number. The "T" suffix indicates tape-and-reel packaging. Typical applications include low-cost logic replacement, timers, counters, sensor signal conditioning, small appliance controllers, white-goods user interfaces, and any volume-driven consumer or industrial application requiring a compact, deterministic 8-bit controller with low-power CMOS characteristics. The PIC16C505T-04E/SL is well suited to designs that need a small footprint (SOIC-14), modest memory, and Microchip's mature PIC tool chain (MPLAB X, MPASM, XC8). When designing with this part, consider that EPROM is OTP, so code must be correct on the first wafer-level programming pass - the -04E suffix indicates 4 MHz speed grade with the extended (industrial) temperature grade. For designs that need re-programmability, look at PIC16F505 (Flash) in the same SOIC-14 pinout; for higher endurance and in-circuit programming, prefer the Flash variant. This page synthesizes distributor pricing, same-family drop-in alternatives, and practical design notes that go beyond the manufacturer datasheet to help engineers select the right part for legacy, EOL, or cost-driven designs.

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PIC16C505T-20/SL - 8-Bit CMOS MCU, 1.5KB OTP, 12 I/O | Microchip
PIC16C505T-20/SL

PIC16C505T-20/SL - 8-Bit CMOS MCU, 1.5KB OTP, 12 I/O | Microchip

The Microchip PIC16C505T-20/SL is an 8-bit, fully static, EPROM/ROM-based CMOS microcontroller delivering 200 ns instruction execution in a 14-pin SOIC (SL) package. It features 1.5KB (1K x 12) of OTP program memory, 72 bytes of RAM, 12 I/O pins, and a 20MHz internal clock rate. The PIC16C505T-20/SL suffix T indicates tape-and-reel packaging while SL denotes the 14-lead SOIC outline. This device is part of Microchip's baseline PIC16 family and targets cost-sensitive, space-constrained embedded designs. A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory, and programmable I/O peripherals. The PIC16C505 belongs to the PIC16 family of 8-bit RISC microcontrollers, sitting under the broader category of embedded processors and microcontrollers within the Integrated Circuits hierarchy. MCUs execute firmware stored in non-volatile memory (here, One-Time-Programmable EPROM) to read sensors, drive actuators, and communicate with other ICs. The 12-bit instruction word and 33-instruction RISC core yield a typical 2:1 code compression over competing 8-bit architectures, allowing more application functionality within the modest 1.5KB program space. Key features of the PIC16C505 include a 4-channel 8-bit analog-to-digital converter (ADC), two analog comparators, a watchdog timer, an 8-bit real-time timer/counter with 8-bit prescaler, and an internal oscillator. The 14-pin SOIC footprint exposes 12 general-purpose I/O lines shared with peripheral functions (ADC inputs, comparator inputs, timer clock). Wide operating voltage (2.5V to 5.5V) and commercial temperature range (0C to +70C for the -20 grade) support battery-powered and consumer applications. Architecturally, the PIC16C505 uses a Harvard RISC core with separate program and data buses, an 8-level deep hardware stack, and direct/indirect addressing modes. The 8-bit ALU operates on data memory organized as general-purpose registers plus special-function registers. A 12-bit instruction word fetches in a single cycle (200ns at 20MHz), with program branches taking two cycles. Power management includes several oscillator modes (RC, LP, XT, HS) and a power-on reset (POR) plus brown-out reset to maintain predictable startup across voltage transients. Typical applications include small appliance controls, IR remote transmitters, security sensors, lighting controllers, fan and motor PWM drivers, and low-cost consumer toys. The 12 I/O pins and integrated ADC are well-matched to read a button, a thermistor, or a potentiometer while driving a relay, LED, or buzzer without external glue logic. A critical design consideration for the PIC16C505 family is its OTP program memory - once programmed, the code is permanent and cannot be erased or rewritten. For prototyping and field-upgradable designs, the PIC16F505 (Flash-based, drop-in compatible in 14-pin SOIC) is the recommended alternative, sharing the same instruction set and peripherals but allowing in-circuit reprogramming.

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PIC16C505T-20I/SL - 8-Bit OTP MCU, 1.5KB, 20MHz | Microchip
PIC16C505T-20I/SL

PIC16C505T-20I/SL - 8-Bit OTP MCU, 1.5KB, 20MHz | Microchip

The Microchip Technology PIC16C505T-20I/SL is an 8-bit CMOS ROM-based microcontroller from the PIC16C family, delivering 20 MHz (200 ns instruction execution) performance with 1.5 KB (1K x 12) of One-Time-Programmable (OTP) program memory in a 14-pin SOIC (SL) package. The 'T' suffix denotes Tape and Reel packaging, while the 'I' suffix indicates the industrial -40C to +85C operating temperature range, and the 'SL' suffix identifies the 3.90 mm-width SOIC package. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, RAM, program memory, and peripherals. The PIC16C family belongs to Microchip's baseline 8-bit architecture using a Harvard RISC design with 12-bit wide instructions, providing approximately 2:1 code compression versus competitors in the same class. Within the broader taxonomy, this device sits as: PIC16C505 -> PIC16C family -> PIC microcontroller -> 8-bit MCU -> microcontroller -> embedded IC -> semiconductor. Key features include 72 bytes of RAM, 11 digital I/O pins, 33 single-word instructions, a hardware 8-bit timer, watchdog timer, internal oscillator option, and a wide 3.0V to 5.5V supply voltage range. The PIC16C505's OTP program memory enables fast prototyping and small-to-medium volume production, while the 14-pin SOIC package supports compact PCB designs. The integrated RC oscillator reduces external component count. Technically, the PIC16C505 uses a 12-bit instruction word with single-cycle execution except for program branches (two cycles). Its RISC architecture delivers deterministic 200 ns instruction time at 20 MHz. The device supports in-circuit serial programming (ICSP) for OTP programming, low-power SLEEP mode with wake-on-pin-change, and brown-out reset protection on most variants, making it suitable for battery-powered and industrial control applications. Typical applications include consumer appliance controls, automotive body electronics, industrial sensor interfaces, low-cost remote controls, lighting ballasts, and battery chargers. The wide operating voltage (3.0V to 5.5V) and industrial temperature range suit harsh-environment deployments, while the small 14-pin footprint targets space-constrained designs. When designing with this device, note that OTP memory requires programming before deployment - unlike flash-based PIC16F505, code cannot be erased or rewritten. Allocate PCB space for the ICSP header (RB6/RB7 pins) to enable factory programming and field firmware updates if needed. This page synthesizes distributor pricing, drop-in alternatives, and engineering notes not consolidated in any single manufacturer document.

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PIC16C54-10/P - 8-Bit 10MHz OTP MCU, 768B | Microchip
PIC16C54-10/P

PIC16C54-10/P - 8-Bit 10MHz OTP MCU, 768B | Microchip

The Microchip Technology PIC16C54-10/P is an 8-bit EPROM/ROM-based CMOS microcontroller (MCU) from the PIC® 16C family, housed in a 18-pin PDIP through-hole package. It runs at a maximum clock frequency of 10 MHz, integrates 768 bytes (512 x 12) of One-Time-Programmable (OTP) program memory, 25 bytes of RAM, and 12 digital I/O pins. Operating from a 4.5 V to 5.5 V single supply, it is built on a fully static RISC core executing 33 single-word, single-cycle instructions over a 12-bit instruction word. What is an OTP microcontroller? An OTP (One-Time-Programmable) microcontroller is a class of embedded MCU whose program memory can be written only once via EPROM-style programming and cannot be erased or rewritten. OTP MCUs sit within the broader microcontroller taxonomy as: microcontroller -> embedded controller -> single-chip computer -> semiconductor. They are positioned between mask-ROM MCUs (cheapest at volume, programmed at wafer fab) and flash-based MCUs (reprogrammable in-circuit), and are favored for low-to-mid-volume production where the small per-unit savings of OTP outweigh the inconvenience of no field updates. Key features of the PIC16C54-10/P include a RISC architecture with 12-bit wide instructions and 8-bit wide data path, seven or eight special-function hardware registers, a two-level deep hardware stack, and direct, indirect, and relative addressing modes for both data and instructions. An 8-bit real-time clock/counter (TMR0) with an 8-bit prescaler handles basic timing, and a watchdog timer improves field reliability. The PIC16C5X core achieves approximately 2:1 code compression over competitive 8-bit MCUs because every instruction fits a single 12-bit word and executes in one cycle. Architecturally, the PIC16C54-10/P uses a Harvard-style separate program/data bus that allows instruction fetch and data access in the same cycle, providing deterministic execution. Its 33-instruction orthogonality and absence of paging or bank-switching complexity simplify assembler development for cost-sensitive designs. The 18-pin PDIP package is industry-standard and breadboard-friendly, which makes the part equally suitable for prototype, hobby, and legacy industrial production runs. Typical applications include low-cost consumer appliances, simple logic-replacement controllers, hobby electronics and educational platforms, sensor signal conditioning, LED driving, and legacy industrial control nodes. The 12 I/O pins and 4.5-5.5 V supply match the I/O requirements of older 5V logic families, easing system integration with TTL-era peripherals. When designing with this part, note that the /P suffix indicates a PDIP package rated for the commercial temperature range (0 C to +70 C) and that OTP memory cannot be re-programmed - the firmware must be fully validated before commitment. Microchip has marked the PIC16C54 as Not Recommended for new designs; engineers should consider the PIC16F54 (flash-based, pin-compatible in most footprints) for new projects.

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PIC16C54-10/SO - 8-bit OTP MCU, 10MHz, SOIC-18 | Microchip
PIC16C54-10/SO

PIC16C54-10/SO - 8-bit OTP MCU, 10MHz, SOIC-18 | Microchip

The Microchip PIC16C54-10/SO is an 8-bit EPROM/ROM-based CMOS microcontroller from the PIC16C5x family, delivering 10 MHz maximum operating frequency in a 18-pin SOIC (7.50 mm width) surface-mount package. It is one of the original RISC-architecture PIC microcontrollers, with 33 single-word single-cycle instructions, 12-bit wide instruction words, an 8-bit wide data path, and 768 bytes of one-time-programmable (OTP) program memory organized as 512 x 12. The device exposes 12 digital I/O pins and 25 bytes of general-purpose RAM, while an 8-bit timer/counter (TMR0) handles basic event timing and pulse measurement. An 8-bit microcontroller (MCU) is a small, self-contained computing element that integrates a CPU, non-volatile program memory, working RAM, and peripheral blocks (timers, I/O, sometimes ADC/UART) on a single die. Microcontrollers occupy the tier between fixed-function ASICs and full microprocessors, sitting hierarchically under embedded computing and above discrete logic. The PIC16C5x family specifically belongs to Microchip's original low-cost, high-performance, fully static OTP/EPROM/ROM lineup; within that family the PIC16C54 is the smallest-memory variant (no ADC, no interrupts beyond TMR0 overflow), making it a stepping stone from discrete logic into programmable control. Key features of the PIC16C54-10/SO include a 4 MHz internal oscillator option, a wide 2.0 V to 6.0 V operating supply range (commercial 0C to +70C), a two-level deep hardware stack, and three addressing modes (direct, indirect, relative). The -10 speed grade specifies a 10 MHz maximum clock at 4.5 V to 5.5 V VDD, with 250 ns minimum instruction cycle. Special-function hardware registers are limited to seven or eight, keeping the core deliberately tiny. Brown-out and watchdog peripherals are absent on this original C-generation part; designers needing them should consider the PIC16C54A or PIC16F54 successors. Typical applications include low-cost consumer appliances, simple sensor and switch interfaces, LED driving sequencers, replacement of discrete 74HC logic, hobby projects, and legacy industrial controllers that were originally designed around the PIC16C5x family. Its fully static CMOS design also makes it well-suited to battery-powered and slow-clock applications where dynamic power can be minimized by lowering the oscillator frequency. When designing with this part, remember it is OTP-only and not reprogrammable in-circuit; production code must be generated by a device programmer such as the MPLAB PM3. Designers should also budget for the lack of interrupts, missing ADC, and limited stack depth - code organization must avoid heavy call nesting. This page synthesizes distributor pricing, drop-in same-brand and cross-brand alternatives, lifecycle context, and practical design notes not found on any single manufacturer or distributor page.

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PIC16C54-10/SS - 8-bit OTP MCU 10MHz 768B SSOP-20 | Microchip
PIC16C54-10/SS

PIC16C54-10/SS - 8-bit OTP MCU 10MHz 768B SSOP-20 | Microchip

The Microchip Technology PIC16C54-10/SS is an 8-bit, fully-static, EPROM/OTP-based CMOS microcontroller from the PIC16C5X family, operating at up to 10 MHz with 768 bytes (512 x 12) of one-time-programmable program memory, 25 bytes of RAM, and 12 digital I/O pins housed in a 20-pin SSOP (Shrink Small Outline Package). It is powered from a single 4.5V to 5.5V supply and integrates a 2-level hardware stack, 33 single-word/single-cycle RISC instructions, an 8-bit real-time clock/counter (TMR0), and direct/indirect/relative addressing modes for both data and instructions. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, working RAM, and peripheral interfaces. Within the broader taxonomy, the PIC16C54 sits in the legacy 8-bit OTP (One-Time Programmable) EPROM MCU class, which belongs to the microcontroller family, which itself belongs to embedded computing, a sub-domain of semiconductors. Modern descendants of this class use Flash memory rather than EPROM and include the PIC16F5X, PIC10/12/16/18 families, but the PIC16C54 architecture is still valued for cost-sensitive, high-volume, mature designs with stable firmware. Key differentiating specifications of the PIC16C54-10/SS include the 33-instruction RISC architecture delivering 2:1 code compression over typical 8-bit CISC MCUs in the same price category, a 12-bit wide instruction word with symmetrical 8-bit data path, hardware MCLR/VPP reset for in-circuit serial programming, and a watchdog timer option. The 20-pin SSOP package has a typical height of 1.75 mm and a body width of 5.30 mm, allowing compact board layouts where 18-pin DIP is too tall. Architecturally, the PIC16C54 uses Harvard memory organization with separate program and data buses, an ALU operating on any working register, and a seven-or-eight special-function hardware register set. This separation allows instructions to be fetched while data is being read or written, eliminating the von Neumann bottleneck and delivering deterministic single-cycle execution on all instructions except program branches (which take two cycles). Typical applications include remote control transmitters, automotive sub-system controllers (interior lighting, seat-position logic), battery chargers, security keypads, small appliance controls, and general-purpose logic replacement in consumer and industrial products. The 10 MHz speed grade is sufficient for state-machine-style control loops and low-speed serial protocols. Design consideration: the OTP program memory requires programming before insertion in production; for prototyping choose the PIC16C54-10/JW (windowed CERDIP) or the flash-based PIC16F54 drop-in equivalent. Use a decoupling capacitor of 100 nF on VDD within 5 mm of the pin, and keep the MCLR/VPP line short to avoid inadvertent resets from switching noise. This page synthesizes distributor pricing from DigiKey and Mouser, drop-in PIC16C5X/16F5X alternatives, and practical SSOP-20 design notes that go beyond the manufacturer datasheet alone.

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PIC16C54-10E/P - 8-bit OTP MCU 10MHz 768B | Microchip Technology
PIC16C54-10E/P

PIC16C54-10E/P - 8-bit OTP MCU 10MHz 768B | Microchip Technology

The Microchip Technology PIC16C54-10E/P is an 8-bit CMOS ROM-based microcontroller from the PIC® 16C family, featuring a 10 MHz maximum clock input, 768 bytes (512 × 12) of One-Time Programmable (OTP) program memory, 25 bytes of RAM, and 12 I/O pins in an 18-pin PDIP package. The 'E' suffix designates the Extended industrial temperature range (-40 °C to +125 °C) and the '10' indicates the 10 MHz speed grade. What is an 8-bit OTP microcontroller? An 8-bit OTP microcontroller is a small, self-contained computer-on-a-chip that uses an 8-bit data path and stores its program in One-Time Programmable EPROM memory. OTP variants sit in the product hierarchy between masked-ROM devices (cheapest at high volume, but require NRE charges) and Flash devices (re-programmable in-circuit); they are widely used where low-to-medium volume production requires field programmability without the cost of a windowed UV-eraseable part. Key features of the PIC16C54-10E/P include 33 single-word instructions (all single-cycle at 200 ns except program branches which take two cycles), a RISC architecture, a Power-On Reset (POR) circuit, a Watchdog Timer (WDT) for reliable operation, and an 8-bit timer/counter. The device operates from 3.0 V to 5.5 V and supports in-circuit serial programming (ICSP) via dedicated pins. The PIC16C5X family uses a Harvard architecture with separate program and data buses, allowing instruction fetch and operand access to occur simultaneously. This RISC-style design gives deterministic 200 ns instruction execution at 10 MHz and produces highly compact code (2:1 compression versus typical 8-bit CISC controllers in the same class). Typical applications include appliance controllers, automotive subsystems (body electronics, sensor interfaces), industrial controls, low-end remote keyless entry, security system panels, and any cost-sensitive embedded application that benefits from a proven, mature 8-bit core. The Extended temperature grade makes the PIC16C54-10E/P suitable for harsh-environment installations. A key design consideration: OTP memory cannot be re-programmed, so code must be fully validated before committing. For prototyping or in-field firmware updates, consider the Flash-based PIC16F54 equivalent (same pinout, same peripherals) before committing the design to OTP. Brown-out detection is not present on this part; use external POR supervision if VDD rise time is slow. This page synthesizes real-time distributor pricing, drop-in alternatives drawn from Microchip's own PIC16C5X family and Zilog's documented PIC16C54-to-Z86E02 upgrade path, plus practical design notes not collected in any single manufacturer datasheet.

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PIC16C54-10E/SO - 8-bit 10MHz OTP MCU 768B | Microchip
PIC16C54-10E/SO

PIC16C54-10E/SO - 8-bit 10MHz OTP MCU 768B | Microchip

The Microchip Technology PIC16C54-10E/SO is a 10 MHz 8-bit RISC microcontroller from the PIC16C5X family, housed in a 18-pin SOIC package and built on a low-power CMOS process. It integrates 768 bytes of OTP program memory (512 x 12-bit wide instructions), 25 bytes of general-purpose RAM, and 12 programmable I/O pins, executing each instruction in a single 200 ns cycle except for program branches. Background: an 8-bit microcontroller (MCU) is a self-contained CPU, memory, and peripheral set on a single die, designed for embedded control. The PIC16C5X architecture sits in the broader hierarchy of microcontroller -> embedded controller -> semiconductor IC. RISC (Reduced Instruction Set Computer) MCUs execute most instructions in one clock cycle, giving higher throughput per MHz than CISC designs. OTP (One-Time Programmable) memory uses EPROM cells that can be written once during production and retain the program permanently - ideal for low-cost high-volume products where firmware does not require field updates. Key features of the PIC16C54-10E/SO include 33 single-word instructions, 8-bit wide data path, 12-bit instruction word, two 8-bit I/O ports (Port A and Port B), a 4 MHz internal oscillator option, and an industrial-grade operating temperature range. Its RISC core, watch-dog timer, and reset logic make it a robust building block for simple embedded designs. Technically, the PIC16C54 uses a Harvard architecture with separate program and data buses, allowing instruction fetch and operand read to overlap. The 10 MHz oscillator (suffix "-10") yields a 100 ns internal clock and a 200 ns instruction cycle. The "E" suffix denotes the Extended (-40C to +125C) operating range, and "/SO" identifies the SOIC-18 wide-body package. This combination delivers predictable real-time performance for legacy designs. Typical applications include automotive body controllers, appliance control boards, simple sensor interfaces, LED driver controllers, and legacy industrial timer modules. Its wide temperature range also suits outdoor and automotive-grade subsystems where field reprogrammability is unnecessary. When designing with this MCU, reserve an external 4.5V-5.5V supply, a decoupling capacitor near VDD, and a pull-up on /MCLR. Verify programming voltage and timing against the PIC16C5X programming specification before committing the OTP image.

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PIC16C54-10E/SS - 8-bit 10MHz OTP MCU 768B | Microchip 20-SSOP
PIC16C54-10E/SS

PIC16C54-10E/SS - 8-bit 10MHz OTP MCU 768B | Microchip 20-SSOP

The Microchip Technology PIC16C54-10E/SS is a member of the PIC16C5X family of low-cost, high-performance, 8-bit fully-static EPROM-based microcontrollers housed in a 20-pin SSOP package. It integrates a RISC CPU core running at 10 MHz, 768 bytes of One-Time Programmable (OTP) program memory organized as 512 x 12-bit words, and 25 bytes of data RAM, with 12 digital I/O pins. The 'E' suffix denotes the Extended (industrial) temperature grade of -40C to +125C. A microcontroller (MCU) is a single-chip computer containing a processor core, program memory, working RAM, and configurable I/O peripherals. The PIC16C5X family in particular pioneered the low-cost, high-pin-count 8-bit OTP segment using a Harvard RISC architecture with only 33 single-word, single-cycle instructions, achieving roughly an order-of-magnitude performance advantage over competing 8-bit MCUs in the same price class. Key features of the PIC16C54-10E/SS include 10 MHz maximum clock, 12-bit-wide instruction words delivering approximately 2:1 code compression versus competing 8-bit MCUs, 12 bidirectional I/O pins, an 8-bit real-time timer/counter with 8-bit prescaler, watchdog timer for reliable operation, power-on reset, power-saving SLEEP mode, and EPROM-based OTP program storage. The PIC16C5X architecture separates program and data buses (Harvard), allowing instruction fetch and operand access in a single oscillator cycle. The 12-bit instruction width keeps code density high - applications typically require fewer bytes of program memory than equivalent CISC designs, which directly reduces OTP programming cost per unit. Typical applications for the PIC16C54-10E/SS include low-cost consumer appliances, simple embedded controllers, sensor signal conditioning front-ends, automotive body electronics, personal-care devices, and any high-volume OTP application where the small 25-byte RAM and 768-byte program memory are sufficient. It is also widely used for educational/training purposes because the PIC16C5X instruction set is small and easy to learn. When designing with the PIC16C54-10E/SS, remember that it is OTP - the program memory can be written only once, so it is unsuitable for code that must be field-upgradable; for that requirement use the flash-based PIC16F54 successor. Operating voltage is typically 3.0 V to 6.0 V. This page synthesizes distributor pricing, drop-in pin-compatible alternatives from the same PIC16C54 family, and practical design notes not duplicated in the manufacturer datasheet, supporting both AEO citation and engineering comparison.

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PIC16C54-10I/P - 8-bit OTP MCU, 10MHz, 12 I/O | Microchip
PIC16C54-10I/P

PIC16C54-10I/P - 8-bit OTP MCU, 10MHz, 12 I/O | Microchip

The Microchip Technology PIC16C54-10I/P is an 8-bit, fully static, EPROM/ROM-based CMOS microcontroller from the PIC16C5X family, delivering up to 10 MHz operation in a 18-pin PDIP (P) through-hole package. It integrates 768 bytes (512 × 12) of One-Time-Programmable (OTP) program memory, 25 bytes of RAM, and 12 digital I/O pins in a RISC architecture with 33 single-word/single-cycle instructions. A microcontroller (MCU) is a single-chip computer that contains a processor core, program and data memory, and programmable I/O peripherals. The PIC16C5X family is a foundational line of low-cost, high-performance 8-bit RISC microcontrollers in the broader category hierarchy: microcontroller -> embedded processor -> semiconductor device. The "C" in PIC16C54 denotes EPROM program memory, distinguishing it from the "F" flash-based successors (PIC16F54/PIC16F84A) while preserving the same instruction set, register layout, and pinout. Key features include a two-level hardware stack, 8-bit real-time clock/counter (TMR0), direct/indirect/relative addressing modes, seven or eight special-function hardware registers, and a watchdog timer for reliable operation. The "-10" speed grade specifies a 10 MHz maximum oscillator frequency with a 100 ns instruction cycle, while the "I" suffix denotes an industrial temperature range of -40 °C to +85 °C. Wide operating voltage support (typically 2.5 V to 6.0 V or 3.0 V to 6.0 V depending on variant) makes the part adaptable to battery-powered and 5 V logic systems. The PIC16C54 architecture is intentionally minimalist — no interrupts, no on-chip peripherals beyond TMR0, no UART — which keeps code density high (12-bit wide instructions deliver roughly 2:1 compression over typical 8-bit CISC competitors). This simplicity translates to deterministic instruction timing, very low sleep current, and predictable real-time behaviour in cost-sensitive embedded designs. Typical applications include consumer appliance controllers, battery chargers, LED drivers, simple sensor interfaces, and educational/hobbyist platforms where cost per unit and deterministic timing outweigh the need for modern peripherals. The 18-pin PDIP package remains popular for breadboarding and through-hole assembly in low-volume production. When designing with this device, note that OTP memory cannot be reprogrammed — firmware bugs require physical part replacement. Designers targeting in-system reprogrammability should consider the PIC16F54 (flash, same pinout) as a pin-compatible modern alternative. This page consolidates distributor pricing, same-family pin-compatible replacements, and engineering design notes that go beyond what appears in the manufacturer datasheet.

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PIC16C54-10I/SO - 8-bit OTP MCU, 768B, 12 I/O, 10MHz | Microchip
PIC16C54-10I/SO

PIC16C54-10I/SO - 8-bit OTP MCU, 768B, 12 I/O, 10MHz | Microchip

The Microchip PIC16C54-10I/SO is a low-cost, high-performance 8-bit CMOS EPROM-based microcontroller from the PIC16C5X family, delivering 10 MIPS performance at 10 MHz and offering 768 bytes of one-time-programmable (OTP) program memory in a 18-pin SOIC package. It is specified for industrial temperature operation (-40C to +85C) and features 25 bytes of RAM, 12 digital I/O pins, a single 8-bit timer/counter (TMR0), and a two-level hardware stack. What is an 8-bit OTP microcontroller? An 8-bit OTP microcontroller is a small CMOS processor that executes fixed-width 12-bit instructions on 8-bit data and stores its program in one-time-programmable EPROM. It belongs to the broader family of embedded microcontrollers (MCUs), which sit within the hierarchy microcontroller -> microprocessor -> integrated circuit -> semiconductor. The PIC16C5X family in particular is a classic RISC architecture from Microchip, and the PIC16C54 is its entry-level member, designed for cost-sensitive, low-pin-count applications where a simple deterministic core is preferred over a complex flash MCU. Key features of the PIC16C54-10I/SO include 33 single-word/single-cycle instructions, 2:1 code compression versus competitive 8-bit MCUs, direct/indirect/relative addressing, 8-bit real-time clock/counter (TMR0), four interrupt sources, and a power-on reset circuit. It supports oscillator modes including RC, LP, XT, HS, and a watchdog timer for reliable industrial operation. The 18-pin SOIC (SO) footprint and 10 MHz maximum clock make it suitable for compact through-hole-free designs. Architecturally, the PIC16C54 uses a Harvard-style RISC core with a 12-bit instruction word and 8-bit data path, allowing most instructions to execute in a single instruction cycle (200 ns at 20 MHz equivalent, 400 ns at 10 MHz). Its seven or eight special-function hardware registers and two-level deep hardware stack simplify programming while keeping silicon area minimal - this is why the part remains popular as a teaching MCU and as an embedded controller in legacy industrial products. Typical applications include simple consumer appliance control, sensor signal conditioning front-ends, LED display drivers, low-cost remote controls, battery chargers, and educational microcontroller kits. The industrial temperature grade (-40C to +85C) extends deployment to factory automation peripherals, HVAC control boards, and automotive aftermarket accessories. When designing with this device, note that the EPROM program memory is OTP - once programmed, the code cannot be erased. For prototyping, choose the PIC16F54 (Flash) or PIC16C54JW (windowed EPROM) variants. In-circuit programming requires the ICSP interface implemented in firmware; the device supports Microchip's standard development toolchain including MPLAB IDE and MPASM assembler. This page synthesizes distributor stock and pricing (as of 2026-09-16), drop-in same-package alternatives, and practical design notes not collated on the manufacturer product page.

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PIC16C54-10I/SS - 8-bit OTP MCU 12 I/O 10MHz | Microchip | SSOP-20
PIC16C54-10I/SS

PIC16C54-10I/SS - 8-bit OTP MCU 12 I/O 10MHz | Microchip | SSOP-20

The Microchip Technology PIC16C54-10I/SS is an EPROM/ROM-based 8-bit CMOS microcontroller delivering 10 MHz CPU performance in a 20-pin SSOP package, with 768 bytes of One-Time-Programmable (OTP) program memory, 25 bytes of data RAM, and 12 digital I/O pins. A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory, and peripherals on one die. The PIC16C54 belongs to the original PIC16C5x family of 8-bit microcontrollers, the foundational architecture that established Microchip's RISC-based mid-range core. Within the broader taxonomy it is classified as an 8-bit MCU -> embedded microcontroller -> integrated circuit -> semiconductor. Key features include 12-bit-wide instructions, an 8-bit data path, a two-level deep hardware stack, direct/indirect/relative addressing modes, and a single 8-bit real-time clock/counter (TMR0) with an 8-bit prescaler. The device supports 33 single-word instructions with a 2:1 code compression advantage over competitors, only 12 special function hardware registers, and a 4 MHz internal oscillator option on selected derivatives. Architecturally the PIC16C54 uses a Harvard-style RISC core with separate program and data buses, executed from EPROM/OTP for one-time programmable production volumes. The 10 MHz rating supports a 100 ns instruction cycle, enabling deterministic control loop execution in cost-sensitive industrial and embedded applications. Typical use cases are low-cost 8-bit control for appliance interfaces, LED drivers, simple sensor readers, and battery-powered devices. Industrial temperature grade -40C to +85C and ceramic-equivalent SSOP-20 thermal robustness make it suitable for factory floor electronics. When designing with this part, remember the 12 I/O budget is shared with the MCLR, oscillator, and TMR0 pins; verify your pin allocation against the SSOP-20 datasheet pinout. The OTP memory cannot be re-programmed, so order pre-programmed units or use the PIC16F54 flash equivalent for development iterations. This page synthesizes distributor pricing, drop-in PIC16C5x family alternatives, and practical design considerations not consolidated on the manufacturer datasheet.

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PIC16C54-H5/SO - 8-bit 20MHz OTP MCU, 768B | Microchip
PIC16C54-H5/SO

PIC16C54-H5/SO - 8-bit 20MHz OTP MCU, 768B | Microchip

The Microchip Technology PIC16C54-H5/SO is an 8-bit CMOS RISC microcontroller from the PIC16C5x family, operating at 20 MHz with 768 bytes (512 x 12) of One-Time-Programmable (OTP) program memory in an 18-pin SOIC package. It is part of the long-running PIC16C5x legacy family of low-cost, high-performance, fully static microcontrollers designed for embedded control. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, memory, and peripherals on one die; OTPs are a class of non-volatile memory that can be written once after manufacture and are ideal for low-to-medium volume production where the firmware is finalized at board bring-up. OTP sits between ROM (mask-programmed at the fab) and Flash (re-programmable in the field) in the reprogrammability hierarchy. PIC microcontrollers belong to the broader category of microcontrollers -> embedded processors -> semiconductors, and are widely used in automotive, industrial, and consumer applications. Key features of the PIC16C54-H5/SO include a RISC architecture with 33 single-word/single-cycle instructions, 12-bit instruction width, 25 ns instruction cycle time at 20 MHz, 32 bytes of RAM, 12 I/O pins, and a programmable Watchdog Timer. The device also supports an internal/external oscillator, selectable low-power XT and HS oscillator modes, and operates across a wide voltage range. This part uses an enhanced Harvard architecture with separate instruction and data buses, allowing instruction fetch to occur in parallel with data access. The 20 MHz maximum clock and single-cycle instruction set give the PIC16C54 approximately 5 MIPS of throughput, which is sufficient for simple control loops, timing, glue logic replacement, and basic sensor interfacing. The 18-SOIC (Small Outline IC) package provides a compact, surface-mountable form factor suitable for hand-soldered prototypes and high-volume PCB assembly. Typical applications for this part include simple state machines, consumer appliance control, battery chargers, automotive body electronics, sensor signal conditioning, fan controllers, and remote-control transmitters. The wide operating range and low cost make it a common choice for legacy and replacement designs where proven firmware is already in production. When designing with this part, note that the -H5 speed suffix denotes the 20 MHz oscillator range and SO is the 18-pin SOIC package. Engineers transitioning new designs to the PIC16C54 family should evaluate newer PIC16F or PIC18 alternatives for Flash-based reprogrammability, but the PIC16C54-H5/SO remains a reliable choice for long-life, cost-sensitive products. This page synthesizes distributor pricing, drop-in alternative listings, and practical design notes for engineers maintaining legacy PIC16C5x designs not covered in the Microchip datasheet alone.

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PIC16C54-H5I/SO - 8-Bit 20MHz OTP MCU | Microchip | 18-SOIC
PIC16C54-H5I/SO

PIC16C54-H5I/SO - 8-Bit 20MHz OTP MCU | Microchip | 18-SOIC

The Microchip Technology PIC16C54-H5I/SO is an 8-bit RISC microcontroller from the PIC16C5x family, delivering 20MHz operation with 768 bytes of One-Time-Programmable (OTP) program memory in a 300-mil 18-pin SOIC package. It integrates 32 bytes of RAM, 12 I/O pins, and a RISC core that executes 33 single-word single-cycle instructions, providing deterministic interrupt response within one instruction period. An OTP microcontroller (One-Time-Programmable) is a class of non-volatile programmable logic device whose program memory is implemented using EPROM cells; once written, the code cannot be erased or rewritten, which makes these parts cost-optimized for high-volume production of fixed-function embedded products. PIC microcontrollers sit within the broader taxonomy: microcontroller -> embedded processor -> semiconductor IC, and they remain one of the most widely deployed 8-bit architectures in industrial, automotive, and consumer products. Key features include a 20MHz clock input, 768 bytes (512 x 12 words) of OTP program memory, 32 bytes of data RAM, 12 bidirectional I/O lines, an 8-bit timer/counter with 8-bit prescaler, power-on reset (POR), watchdog timer (WDT), and an operating voltage range suited to 3V to 5.5V systems. The wide operating temperature range of -40C to +85C (industrial grade, indicated by the 'I' suffix) supports harsh-environment deployment. The PIC16C5x architecture uses a Harvard design with separate program and data buses, enabling concurrent instruction fetch and operand access. The 12-bit instruction word is compact, and every instruction (except branches) executes in a single 200ns instruction cycle at 20MHz. The H5 speed variant indicates 20MHz maximum clock, with low-power CMOS construction that minimizes current draw in standby. Typical applications include appliance control, smart sensors, industrial timers, simple motor control, LED lighting controllers, and low-cost remote-control transmitters. Because the PIC16C54 uses OTP memory rather than flash, it is best suited to mature, finalized firmware where code updates are not anticipated during the product lifecycle. When designing with this part, ensure the MCLR reset circuit includes a 10k pull-up and decoupling of 100nF at VDD within 1 cm of the pin; the OSC1/OSC2 crystal or resonator choice must match the H5 speed grade to guarantee 20MHz stable oscillation across the -40C to +85C range. This page synthesizes distributor pricing, drop-in same-family alternatives, and practical design notes drawn from Microchip's PIC16C5x datasheet family, providing decision support that goes beyond what any single distributor page offers.

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