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PIC16C73AT-04/SO - 4MHz 8-bit CMOS MCU 7KB OTP 28-SOIC | Microchip
PIC16C73AT-04/SO

PIC16C73AT-04/SO - 4MHz 8-bit CMOS MCU 7KB OTP 28-SOIC | Microchip

The Microchip Technology PIC16C73AT-04/SO is an 8-bit CMOS RISC microcontroller from the PIC16C7X family, delivering 4 MHz maximum clock speed with 7 KB (4K x 14 words) of One-Time Programmable (OTP) program memory and 192 bytes of data RAM, packaged in a 28-pin SOIC (SOP) gull-wing surface-mount format. The 'T' suffix indicates Tape & Reel packaging and the '-04' suffix specifies the 4 MHz speed grade. According to Microchip's PIC16C7X datasheet, this mid-range MCU integrates a built-in analog-to-digital (A/D) converter, making it a complete all-in-one solution for embedded designs that need both digital control and analog signal acquisition on a single chip. A microcontroller (MCU) is a single integrated package that combines a CPU core, program memory (ROM/OTP/Flash), data RAM, peripheral interfaces (timers, ADC, communication ports), and I/O pins on one die. Microcontrollers sit in the broader system hierarchy of embedded computing: microcontroller -> microprocessor -> CPU -> integrated circuit -> semiconductor. The PIC16C73A specifically belongs to the PIC16CXX mid-range family, a class of low-cost, high-performance, fully-static 8-bit microcontrollers introduced by Microchip in the 1990s that became a foundational element in thousands of industrial and consumer product designs. Key features include 22 I/O lines, Harvard architecture with separate program and data buses, a wide operating voltage range, low power consumption suitable for battery-powered systems, and on-chip peripherals such as timers, a synchronous/asynchronous serial port (USART), capture/compare/PWM modules, and a multi-channel 10-bit A/D converter. The 28-pin SOIC form factor makes it suitable for hand-soldering, prototype work, and compact production boards where through-hole DIP variants are too tall. The PIC16C73A's architecture uses a 14-bit instruction word with an 8-bit data path, allowing compact code density and a small instruction set (35 instructions total) that is easy to learn. The 192-byte RAM and 7 KB OTP program memory target small- to mid-size embedded applications. With 22 I/O pins and integrated peripherals, the device can directly drive displays, sensors, communication interfaces, and power-control signals without external glue logic. Typical applications include industrial control systems, automotive body electronics, appliance control boards, security and alarm systems, and instrumentation where 8-bit processing, integrated analog input, and 28-pin SOIC footprint are required. Designers frequently select this part for legacy product maintenance, cost-sensitive designs, and educational platforms that need a reliable OTP MCU with proven toolchain support (MPLAB). When designing with this part, note that OTP memory can be programmed only once and cannot be erased or rewritten - choose PIC16F73 (Flash-based) for designs that need firmware updates in production.

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PIC16C73AT-04E/SO - 8-Bit 4MHz OTP MCU 7KB | Microchip
PIC16C73AT-04E/SO

PIC16C73AT-04E/SO - 8-Bit 4MHz OTP MCU 7KB | Microchip

The Microchip Technology PIC16C73AT-04E/SO is a CMOS, fully-static, 8-bit PIC16C-family microcontroller integrating 7KB (4K x 14) of One-Time Programmable (OTP) program memory and 192 x 8 bytes of user RAM, operating at up to 4 MHz from a 28-pin SOIC wide-body package (7.50 mm). The 'T' suffix denotes Tape & Reel packaging for high-volume automated assembly, while the '04E' speed grade targets the extended 4 MHz operating point. The device belongs to the PIC16C7X sub-family and is built around Microchip's enhanced mid-range RISC core with 35 single-word instructions. An 8-bit PIC microcontroller (MCU) is a single-chip computer built on Harvard architecture, where program and data memories use separate buses. The 'mid-range' PIC16C family sits between the baseline PIC10/12/16 families and the high-end PIC18 family, balancing instruction simplicity with peripherals. The OTP variant allows the program memory to be written once using an external programmer, suiting low-cost, moderate-volume production runs where field re-programmability is not required. Key features include 22 digital I/O pins, an integrated multi-channel 8-bit Analog-to-Digital Converter, three timer modules, a synchronous serial port (SSP) supporting SPI and I2C, a USART, and a watchdog timer with on-chip RC oscillator. The core delivers 5 MIPS performance at 20 MHz equivalent throughput and operates across 2.5 V to 6.0 V supply range. CMOS fully-static design ensures that clock frequency can be reduced to DC without losing register contents, ideal for sleep-mode power management in battery-powered applications. The 'fully-static CMOS' architecture combines low power consumption with deterministic instruction execution. Each instruction cycle is four oscillator periods, giving predictable timing for real-time control loops. The 14-bit instruction word provides a wider opcode space than baseline PIC devices, supporting literal operations and direct branch instructions. Brown-out Reset, Power-on Reset, and the watchdog timer work together to recover from firmware faults or supply transients, critical for industrial and appliance environments. Typical applications include industrial control and sensor interfacing, automotive body electronics (pre-CAN-era subsystems), home appliances such as washing machines and microwave ovens, HVAC thermostats, motor control boards, and embedded data-acquisition systems. The integrated ADC eliminates the need for an external converter in many low-channel-count designs. When designing with this device, note that the OTP memory cannot be erased or rewritten, so firmware must be fully validated on a windowed or Flash equivalent before committing to OTP programming. A 1kΩ to 10kΩ pull-up on the MCLR pin is recommended, and decoupling capacitors must be placed within 1 cm of VDD/VSS for reliable operation. This page synthesizes distributor stock levels, pin-compatible alternatives, and design guidance not consolidated on the manufacturer datasheet, giving engineers faster decision support for both new designs and legacy maintenance.

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PIC16C73AT-04I/SO - 8-Bit 4MHz OTP MCU 7KB Flash | Microchip
PIC16C73AT-04I/SO

PIC16C73AT-04I/SO - 8-Bit 4MHz OTP MCU 7KB Flash | Microchip

The Microchip Technology PIC16C73AT-04I/SO is an 8-bit CMOS OTP (One-Time Programmable) microcontroller from the PIC16C7X mid-range family, operating at up to 4 MHz and delivering 7 KB of program memory organized as 4K x 14 words in a 28-pin SOIC (0.295-inch, 7.50 mm body width) package. It integrates 192 x 8 bytes of RAM, a 5-channel 8-bit Analog-to-Digital Converter, 22 digital I/O pins, and the classic PIC16CXX peripheral set including timers, Capture/Compare/PWM, USART, and synchronous serial port. What is a PIC mid-range 8-bit microcontroller? The PIC16CXX mid-range family is a Harvard-architecture RISC MCU family from Microchip Technology, characterized by a 14-bit instruction word, 8-bit data path, single accumulator (W) plus up to four banked file registers, and a deterministic instruction pipeline. The 16C sub-family is the OTP-only classic variant that preceded the flash-based 16F series, and remains in active production for legacy industrial and embedded designs where code is finalized and field re-programmability is not required. Key features of this PIC16C73AT-04I/SO include the integrated 5-channel 8-bit ADC that allows direct interface with analog sensors without an external ADC, the USART module for asynchronous serial communication, and the I2C/SPI-compatible Synchronous Serial Port (SSP). The 22 I/O pins are 5V-tolerant and can source/sink up to 25 mA each, supporting direct LED drive and small relay coils. Brown-out Reset, Power-on Reset, Watchdog Timer with on-chip RC oscillator, and In-Circuit Serial Programming (ICSP) round out the standard PIC16C7X feature set. The 28-SOIC industrial-temperature variant (-40C to +85C, indicated by the 'I' suffix) is housed in a 7.50 mm body width SOIC package, suitable for hand-soldered prototypes, low-volume production, and through-hole-friendly SMT assembly. The -04 speed grade limits the clock to 4 MHz maximum (10 MHz would be -10, 20 MHz would be -20), reducing EMI in noise-sensitive instrumentation. Typical applications include industrial control panels, motor driver front-ends (gate-driver sequencing and fault monitoring), instrumentation with local A/D conversion, legacy 5V embedded systems, automotive body controllers (non-safety), and consumer appliances. The integrated ADC and USART allow a single-chip solution for sensor reading and host communication. When designing with this device, mind the OTP memory limitation: code is committed at the final programming step and cannot be re-flashed. Use the 16F73 or 16F873A flash-based cousin for development phases. Ensure the MCLR pin has the correct decoupling and that the oscillator configuration bits match the crystal or resonator selected. This page synthesizes distributor pricing, same-brand drop-in alternatives, and practical design notes not found in the manufacturer datasheet. Engineers evaluating PIC16C73AT-04I/SO for new designs should weigh the OTP constraint against the legacy 5V supply, integrated ADC, and proven PIC16C7X peripheral set.

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PIC16C73AT-10/SO - 8-bit RISC MCU, 7KB EPROM, 22 I/O, 20MHz SOIC-28
PIC16C73AT-10/SO

PIC16C73AT-10/SO - 8-bit RISC MCU, 7KB EPROM, 22 I/O, 20MHz SOIC-28

The Microchip Technology PIC16C73AT-10/SO is an 8-bit RISC CMOS microcontroller from the PIC16C7X family, featuring 7KB of UV-erasable program memory (EPROM/OTP), 192 bytes of RAM, and 22 digital I/O lines, housed in a 28-pin Small-Outline IC (SOIC/SOP) package. It executes most instructions in a single 200ns cycle at a 20MHz oscillator (10MHz instruction rate, indicated by the "-10" speed suffix), and operates from a 4.0V to 5.5V single supply. The device integrates a 5-channel 8-bit ADC, one 8-bit timer/counter, two 16-bit timers, a USART, and a synchronous serial port (SSP) for SPI/I2C peripherals. An 8-bit RISC microcontroller is a processor built on a Reduced Instruction Set Computer architecture with 8-bit data width, optimized for deterministic real-time control. Within the broader system taxonomy, the PIC16C73A sits in the category hierarchy: microcontroller -> embedded microcontroller -> 8-bit MCU -> RISC MCU -> CMOS MCU -> semiconductor. Compared with CISC architectures, RISC MCUs offer shorter instruction latencies and predictable cycle counts, making them well-suited for hard-real-time applications such as motor control, instrumentation, and sensor interfacing. Key differentiating features of the PIC16C73A include on-chip A/D conversion (eliminating external ADC chips), a hardware USART for asynchronous serial communication, and dual 16-bit timers with capture/compare/PWM (CCP/DSR) capability. The integrated peripheral set makes it suitable for embedded designs that previously required multiple discrete ICs. The "T" suffix denotes the tape-and-reel packaging option, and the "/SO" suffix designates the SOIC-28 wide-body footprint. Architecturally, the PIC16C73A employs a Harvard architecture with separate program and data buses, a 14-bit instruction word, and a two-stage pipeline for predictable instruction throughput. The Harvard split prevents data accesses from stalling instruction fetches, supporting the 200ns single-cycle execution. On-chip EPROM allows code development cycles via ultraviolet erasure and windowed packages, but in production a one-time-programmable (OTP) variant is typically used. Typical applications include industrial control systems, sensor interfacing with analog inputs, motor drive controllers, embedded serial communication nodes (RS-232/RS-485 bridges), and low-power instrumentation. The wide SOIC-28 footprint simplifies hand-soldering and rework during prototyping. Designers should ensure MCLR is properly handled (internal pull-up enabled via configuration bits) and that the in-circuit serial programming (ICSP) interface is reserved for firmware updates. This page consolidates distributor pricing, same-brand drop-in alternatives, and practical design guidance beyond what the manufacturer datasheet provides.

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PIC16C73AT-10I/SO - 8-Bit 10MHz OTP MCU 7KB | Microchip
PIC16C73AT-10I/SO

PIC16C73AT-10I/SO - 8-Bit 10MHz OTP MCU 7KB | Microchip

The Microchip Technology PIC16C73AT-10I/SO is an 8-bit CMOS RISC microcontroller from the PIC16C7X mid-range family, operating at 10 MHz with 7 KB (4K x 14) of One-Time Programmable (OTP) program memory, 192 bytes of RAM, and 22 digital I/O lines, housed in a 28-pin SOIC (SO) wide-body package supplied on Tape & Reel. The device integrates a multi-channel 8-bit A/D converter, synchronous/asynchronous serial port (USART/SCI), and capture/compare/PWM peripherals, addressing embedded control designs that previously required multiple discrete components. It executes most instructions in a single 200 ns cycle, giving true 10 MIPS throughput at 10 MHz oscillator frequency. A microcontroller (MCU) is a single-chip computer containing a CPU, non-volatile program memory, working RAM, and configurable peripheral blocks. The PIC16C7X family is part of Microchip's mid-range architecture - one tier above the baseline 12-bit/14-bit instruction PIC16C5X family and below the enhanced 16-bit PIC17C/PIC18C families. Within the broader semiconductor taxonomy, the PIC16C73A sits in the 8-bit MCU segment, sharing its core with PIC16C7X siblings and offering the integrated ADC that distinguishes the 73A from the 72A and 74A flash siblings. Key features include a Harvard architecture with separate program and data buses, 8-level hardware stack, 14-bit wide instruction word, two 8-bit timers plus one 16-bit timer, watchdog timer with dedicated on-chip RC oscillator, power-on reset, brown-out reset, and in-circuit serial programming capability via the ICSP interface. The 28-pin SOIC package supports surface-mount assembly in industrial temperature grade (-40C to +85C), enabling factory automation and process control deployments where through-hole DIP is impractical. Typical applications include industrial control, motor drive, instrumentation, sensor signal conditioning, and white-goods control boards. The integrated 8-channel 8-bit ADC supports direct connection to analog front-end signals, eliminating an external converter IC and reducing BOM cost. For new designs Microchip recommends PIC16F73 (Flash) or PIC16C73B as the modern equivalent, but the PIC16C73AT-10I/SO remains in use across long-life industrial and legacy equipment maintenance. When designing with this part, note that OTP memory cannot be erased or rewritten; use the windowed PIC16C73A-10/P (ceramic DIP) for prototype development, then transition to the OTP/SOIC variant for production. Provide a 10 kohm pull-up on MCLR/Vpp and respect the 6 MHz minimum oscillator type for the -10 speed grade (10 MHz maximum).

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PIC16C73AT-20/SO - 8-Bit 20MHz 7KB OTP MCU | Microchip
PIC16C73AT-20/SO

PIC16C73AT-20/SO - 8-Bit 20MHz 7KB OTP MCU | Microchip

The Microchip Technology PIC16C73AT-20/SO is an 8-bit RISC microcontroller from the PIC16CXX mid-range family, offering 7KB (4K x 14) of One-Time-Programmable (OTP) EPROM program memory, 192 bytes of RAM, and 22 digital I/O pins. Housed in a 28-pin SOIC (SO) package supplied on tape and reel, it operates at up to 20 MHz (5 MIPS) and integrates a 5-channel 8-bit Analog-to-Digital Converter plus I2C, SPI, and UART/USART serial peripherals. Input supply range is 4V to 6V and the commercial temperature grade spans 0C to +70C. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, non-volatile program memory, working RAM, and configurable peripheral blocks onto one silicon die. Within the broader taxonomy it is a microcontroller -> embedded processor -> integrated circuit -> semiconductor. The PIC16C7X family specifically targets cost-sensitive embedded control where deterministic instruction execution, low external component count, and on-chip analog simplify board design. Key features include 35 single-word instructions, fully static CMOS architecture, an 8-level hardware stack, power-on reset, brown-out detection, watchdog timer with its own on-chip RC oscillator, and code protection. The integrated ADC eliminates an external converter in sensor-interface designs, while the three serial interfaces (USART, SSP for SPI/I2C) cover the majority of master/slave bus topologies used in industrial and consumer control. Architecturally the device uses a Harvard structure with separate 14-bit program and 8-bit data paths, enabling single-cycle instruction fetch and deterministic throughput. The OTP EPROM allows one-time programming using standard Microchip development tools, making this part suitable for production runs where in-system reprogrammability is not required. Typical applications include appliance control, HVAC fan and damper drivers, industrial sensor interfaces, automotive body modules (non-safety), consumer remote controls, and small UART/SPI gateway nodes. The wide 4-6V input range simplifies integration into 5V regulated rails. When designing with this part, reserve the brown-out and watchdog configuration bits at programming time and verify the chosen oscillator mode (XT/HS/RC) matches the external crystal or resonator. Because this is OTP, firmware revisions require a board respin; choose PIC16F73 for development flexibility or PIC16C73B for extended temperature.

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PIC16C73AT-20E/SO - 8-bit OTP MCU 7KB 22 I/O | Microchip
PIC16C73AT-20E/SO

PIC16C73AT-20E/SO - 8-bit OTP MCU 7KB 22 I/O | Microchip

The Microchip Technology PIC16C73AT-20E/SO is a high-performance, CMOS, fully-static 8-bit microcontroller with 7KB (4K x 14) of One-Time-Programmable (OTP) program memory, 192 bytes of RAM, and 22 digital I/O lines, housed in a 28-pin SOIC (SO) wide-body package with 0.295 inch / 7.50 mm width. It operates at up to 20 MHz clock speed from a 5 V supply and integrates a multi-channel 8-bit Analog-to-Digital (A/D) converter, making it part of Microchip's PIC16C7X mid-range family. An OTP (One-Time-Programmable) microcontroller is a type of embedded MCU whose program memory can be written only once and then permanently retains the code without a quartz window. Compared to UV-erasable EPROM MCUs, OTP variants are typically lower cost and ship in opaque plastic packages, while sharing the same instruction set and peripheral set. In the system hierarchy, the PIC16C73A sits under: microcontroller (MCU) -> 8-bit MCU -> mid-range MCU -> PIC16C family -> PIC16C7X sub-family -> embedded computing subsystem. Key features include Harvard RISC architecture with 35 single-cycle instructions (200 ns instruction cycle at 20 MHz), an integrated 8-bit A/D converter with multiple input channels, capture/compare/PWM (CCP) peripherals, a USART for serial communication, and a watchdog timer with on-chip RC oscillator for reliable operation. The device supports brown-out reset, power-on reset, and code protection features, providing robust embedded control. The PIC16C73AT-20E/SO utilizes a 14-bit instruction word and a separate 8-bit data path, allowing instruction fetch to occur in parallel with data access - the hallmark of the Harvard architecture. This design delivers deterministic single-cycle execution for most instructions and predictable real-time response, which is critical in motor control, instrumentation, and industrial automation loops. The 'E' suffix designates the extended industrial operating temperature grade (-40 °C to +125 °C), while the 'T' denotes tape-and-reel packaging and '20' denotes 20 MHz maximum clock frequency. Typical applications include industrial process control, automotive body electronics, motor control for small DC and brushless motors, sensor signal conditioning, instrument panels, and battery charging systems. The integrated A/D converter and PWM outputs enable direct interfacing with analog sensors and actuators without external glue logic. When designing with this device, note that OTP memory cannot be reprogrammed; for field-upgradable designs, consider the flash-based PIC16F73 family as a pin-compatible alternative. Decoupling capacitors must be placed within 1-2 cm of VDD/VSS pins, and unused I/O pins should be configured as outputs low or inputs with internal pull-ups to minimize power consumption. This page synthesizes verified distributor pricing, drop-in alternatives, and design notes that complement the manufacturer datasheet to help engineers make faster component-selection decisions.

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PIC16C73AT-20I/SO - 8-bit MCU 7KB OTP 20MHz 28-SOIC | Microchip
PIC16C73AT-20I/SO

PIC16C73AT-20I/SO - 8-bit MCU 7KB OTP 20MHz 28-SOIC | Microchip

The Microchip PIC16C73AT-20I/SO is a high-performance 8-bit CMOS RISC microcontroller from the PIC16C7X mid-range family, delivering 5 MIPS performance at 20 MHz in a 28-pin SOIC (W) wide-body package with tape-and-reel packaging (suffix "T"). It integrates 7 KB of One-Time Programmable (OTP) program memory organized as 4K x 14 words, 192 bytes of user RAM, and an on-chip 8-channel 8-bit Analog-to-Digital converter, making it a self-contained embedded control solution for mixed-signal products. The device is specified for the industrial -40C to +85C operating temperature range (suffix "I") and runs from a single 5V rail (range 2.5V to 6.0V). A microcontroller (MCU) is a single-chip computer containing a CPU, program memory, working RAM, and programmable I/O peripherals. The PIC16C7X family belongs to Microchip's mid-range architecture (a hypernym tree of: 8-bit MCU -> PIC16CXX mid-range -> PIC16C7X family -> PIC16C73A sub-family), which uses a 14-bit instruction word and Harvard bus architecture that lets the CPU fetch instruction and data words in parallel. The 8-bit accumulator-based core executes 35 single-word instructions, most in a single instruction cycle, achieving near 1 MIPS per MHz efficiency. Key features of the PIC16C73AT-20I/SO include a hardware Universal Synchronous/Asynchronous Receiver-Transmitter (USART/SCI) for serial communication, a Synchronous Serial Port (SSP) supporting SPI and I2C master/slave modes, three timer/counters (Timer0, Timer1, and Timer2 with PWM), a watchdog timer with on-chip RC oscillator, and a 5-channel 8-bit analog-to-digital converter. The 22 programmable I/O pins each source/sink up to 25 mA and feature individual direction registers. Brown-out reset and power-on reset provide reliable boot behavior from unpredictable supply ramps. Architecturally the PIC16C73A uses CMOS EPROM-based program memory, which is electrically one-time-programmable (OTP) via the Microchip PRO MATE or PICSTART programmer. The Harvard bus, separate instruction and data buses, allows pipelined instruction fetch while the data memory access completes in the same cycle. An integrated 8-bit ADC samples at approximately 20 us per conversion with 8 analog input channels multiplexed onto a single successive-approximation converter. Typical applications for the PIC16C73AT-20I/SO include industrial process control, instrumentation data acquisition, appliance motor control, automotive body electronics, sensor conditioning, and embedded control boards requiring on-chip A/D conversion. Its 7KB code space comfortably hosts moderate logic density, while the integrated ADC eliminates an external converter in cost-sensitive designs. Designers should note that this OTP variant is programmed once and cannot be field-upgraded - for development and field-reprogrammable use choose a Flash equivalent such as PIC16F73 in the same 28-SOIC footprint. Programming requires a 5V VPP supply; in-system programming is not supported on the C-series, only via Microchip's parallel programmer. This page synthesizes verified distributor pricing, same-brand and cross-brand drop-in alternatives in the same 28-SOIC footprint, and practical design notes that go beyond the manufacturer datasheet's specification tables.

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PIC16C73B-04/SO - 4MHz 8-Bit OTP MCU, 7KB, 28-SOIC | Microchip
PIC16C73B-04/SO

PIC16C73B-04/SO - 4MHz 8-Bit OTP MCU, 7KB, 28-SOIC | Microchip

The Microchip Technology PIC16C73B-04/SO is an 8-bit CMOS microcontroller based on the PIC16C7X mid-range family, featuring 7KB of one-time-programmable (OTP) program memory organized as 4K × 14 words and operating at a maximum clock speed of 4 MHz with a 200 ns instruction cycle. It is housed in a 28-pin SOIC package and integrates 192 bytes of RAM, 22 digital I/O lines, 5 channels of 8-bit A/D converter, 2 capture/compare/PWM modules, and a configurable synchronous serial port that supports both 3-wire SPI and 2-wire I²C, alongside a USART for asynchronous serial communication. A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory (ROM/Flash/OTP for program storage and RAM for data), and programmable I/O peripherals. Within the broader semiconductor taxonomy, MCUs belong to the logic IC family, and the PIC16C7X sits in the mid-range tier of Microchip's 8-bit PIC portfolio, between the baseline PIC10/12/16 families and the enhanced PIC17/18 families. OTP-based parts such as the PIC16C73B were designed for cost-sensitive, low-volume production runs where field reprogrammability was unnecessary. Key features of the PIC16C73B-04/SO include 35 single-word RISC instructions (all single-cycle except for program branches which take two cycles), a 14-bit instruction word, and a wide operating voltage range of 4.0 V to 5.5 V. The device includes three timers (Timer0 8-bit, Timer1 16-bit, Timer2 8-bit) and offers low-power SLEEP mode with wake-up via external interrupts or Timer1 overflow from an external crystal. Architecturally, the PIC16C73B employs a Harvard-style RISC core with separate program and data buses, enabling single-cycle instruction fetch from OTP program memory. The 8-bit A/D converter is shared with the analog input pins, and the synchronous serial port's mode is software-configurable at runtime, allowing the same pins to serve either SPI or I²C peripherals. Typical applications include industrial control systems, sensor signal conditioning with ADC input, motor control via the CCP/PWM modules, and embedded serial-communication bridges using the USART or SPI/I²C. The 28-SOIC footprint is well suited to moderate-density designs that need a balance of integration and through-hole-to-surface-mount migration paths. When designing with this part, remember that OTP memory can be programmed only once; for development or production code revision cycles, consider the Flash-based PIC16F73 or PIC16F873A pin-compatible successors. Decoupling requires a 0.1 µF ceramic capacitor placed as close as possible to VDD, with a bulk 1-10 µF tantalum or aluminum electrolytic on the same rail. This page synthesizes current distributor pricing, drop-in PIC16C7X family alternatives, and practical design notes that go beyond the manufacturer datasheet to help engineers select and source the right part for new and legacy designs.

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PIC16C73B-04/SP - 8-Bit 4MHz OTP MCU, 7KB, 28-SPDIP | Microchip
PIC16C73B-04/SP

PIC16C73B-04/SP - 8-Bit 4MHz OTP MCU, 7KB, 28-SPDIP | Microchip

The Microchip Technology PIC16C73B-04/SP is an 8-bit CMOS RISC microcontroller from the PIC16CXX mid-range family, featuring 7KB (4K x 14) of one-time programmable (OTP) program memory, 192 bytes of RAM, and 22 digital I/O pins. It operates at a clock speed of 4 MHz with a 200 ns instruction execution time, packaged in a 28-pin SPDIP (SP) through-hole package. The '04' suffix denotes the 4 MHz speed grade and the commercial 0C to +70C operating temperature range. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, data RAM, and peripheral interfaces onto one silicon die. The PIC16C73B sits in the PIC16CXX mid-range taxonomy, which is one tier below enhanced 16-bit PIC families and above baseline 10F/12F/16F parts. MCUs are classified within integrated circuits -> microcontrollers -> 8-bit microcontrollers -> RISC microcontrollers -> embedded controllers. The PIC16C73B's OTP program memory is a synonym for one-time programmable EPROM (the 'C' series indicates EPROM, while 'F' indicates Flash, and 'LC' indicates ROM-less). Key differentiating features include five channels of 8-bit Analog-to-Digital (A/D) conversion, two additional timers, two capture/compare/PWM peripherals, and a synchronous serial port configurable as either 3-wire SPI or 2-wire I2C. The device also integrates a Universal Asynchronous Receiver Transmitter (USART) for asynchronous serial communication. With only 35 single-word instructions to learn, the PIC16C73B uses a Harvard RISC architecture that executes instructions in a single cycle (200 ns at 4 MHz), except for program branches which take two cycles. Typical applications include industrial control systems, sensor interfaces, motor control, embedded instrumentation, and legacy 8-bit embedded designs. The five 8-bit ADC channels and two PWM outputs make it suitable for closed-loop control loops reading analog sensors and driving actuators or motors. The integrated USART, SPI, and I2C peripherals support communication with sensors, displays, and other MCUs. When designing with this part, note that the '04' speed grade limits operation to 4 MHz, and the OTP memory cannot be re-programmed in-circuit. For new designs, the Flash-based PIC16F73 or PIC16F873A is generally preferred; the PIC16C73B-04/SP serves legacy maintenance and existing designs.

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PIC16C73B-04/SS - 8-Bit 4MHz OTP MCU 7KB | 28-SSOP | Microchip
PIC16C73B-04/SS

PIC16C73B-04/SS - 8-Bit 4MHz OTP MCU 7KB | 28-SSOP | Microchip

The Microchip Technology PIC16C73B-04/SS is an 8-bit CMOS microcontroller built on the PIC16C family RISC architecture, operating at 4 MHz with 7 KB (4K x 14) of One-Time-Programmable (OTP) program memory, and packaged in a 28-pin SSOP (0.209 inch, 5.30 mm width) surface-mount format. It integrates 192 bytes of RAM, 22 digital I/O lines, and five channels of 8-bit Analog-to-Digital (A/D) conversion, plus two Capture/Compare/PWM modules and a synchronous serial port configurable as SPI or I2C alongside a USART. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, working RAM, and peripheral interfaces into one package. The PIC16C73B belongs to the PIC16C family of 8-bit CMOS MCUs - the architecture taxonomy walks: 8-bit microcontroller -> RISC MCU -> PIC16C family -> Microcontroller Unit (MCU) -> semiconductor device. The "B" suffix denotes the second-generation, enhanced mid-range core, which introduced improvements such as lower power consumption, additional peripherals, and better oscillator stability over the original PIC16C73. Key features include 35 single-word instructions, a 200 ns instruction cycle at 4 MHz (single-cycle execution except for program branches which take two cycles), an operating voltage range of 4.0 V to 5.5 V, brown-out detect/power-on reset, a watchdog timer with its own on-chip RC oscillator for reliable operation, and a commercial operating temperature range of 0 C to +70 C. The synchronous serial port (SSP) supports both three-wire SPI and two-wire I2C protocols with master/slave modes. The PIC16C73B uses a Harvard architecture with separate program and data buses, allowing instruction fetch and operand access in a single machine cycle. The 14-bit wide program memory bus accommodates single-word instructions with embedded literal data, while the 8-bit data memory bus addresses the general-purpose register file and special function registers. Five analog input channels share pins with digital I/O and route through a successive-approximation A/D converter with acquisition time programmable via software. Typical applications include industrial control subsystems, sensor signal conditioning, motor control loops, simple human-machine interfaces, and embedded data-acquisition front-ends. The PIC16C73B-04/SS is widely used where one-time-programmable non-volatile memory is acceptable and the design needs robust analog and serial peripherals without requiring in-system reprogramming. When designing with this device, consider that OTP memory cannot be re-programmed after the initial write, so production-grade code should be burned once and verified - use a flash-based PIC16F equivalent for development cycles requiring firmware updates. Place decoupling capacitors (100 nF ceramic plus 10 uF bulk) within a few millimeters of VDD/VSS pins, and reserve the MCLR pin for a proper reset network. This page consolidates distributor pricing, drop-in replacement options in the same 28-SSOP footprint, and practical design notes not found in the bare Microchip datasheet, helping engineers shorten the device-selection and BOM-validation cycle.

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PIC16C73B-04E/SP - 8-bit 4MHz OTP MCU 7KB Flash | Microchip
PIC16C73B-04E/SP

PIC16C73B-04E/SP - 8-bit 4MHz OTP MCU 7KB Flash | Microchip

The Microchip Technology PIC16C73B-04E/SP is an 8-bit CMOS RISC microcontroller built around the PIC16CXX mid-range core, delivering 4 MHz instruction execution (200 ns instruction cycle) and packaged in a 28-pin SPDIP (Skinny Plastic DIP) through-hole form factor. Per the manufacturer datasheet it integrates 7 KB of OTP program memory (4K x 14 words), 192 bytes of RAM, 22 digital I/O pins, plus 5 channels of 8-bit Analog-to-Digital converter, two 8-bit timers with capture/compare/PWM, one synchronous serial port configurable as 3-wire SPI or 2-wire I²C, and a USART. The 'E' suffix indicates the Extended industrial temperature range (-40 °C to +125 °C). An 8-bit microcontroller (MCU) is a single-chip computer with an 8-bit data path, integrating a CPU core, non-volatile program memory, volatile data memory, and programmable peripherals. Within the broader taxonomy it is a microcontroller -> embedded processor -> integrated circuit -> semiconductor. The PIC mid-range architecture falls between PIC10/12/16 baseline 8-pin devices and PIC18 high-performance 16-bit-path cores, optimized for deterministic real-time control with a small instruction set (35 single-word instructions). Key differentiating features of the PIC16C73B-04E/SP include: 4 MHz maximum operating frequency, 7 KB OTP program memory (one-time programmable; cannot be erased), 192-byte data RAM, 5 channels of 8-bit ADC, and a flexible synchronous serial port that supports both SPI master/slave and I²C master/slave modes in hardware. Wide operating voltage 2.5 V to 6.0 V (per the family datasheet) and high sink/source current of 25/25 mA per I/O pin allow direct drive of LEDs, relays, and small power transistors without buffering. Architecturally, the device uses a Harvard architecture with separate program and data buses, allowing instruction fetch and operand read in a single cycle for most instructions (only program branches require two cycles). The CMOS process delivers typical standby current of 1 µA at 3 V / 32 kHz and active current of ~15 µA at 5 V / 4 MHz, and the device supports external clock, RC, LP, XT, and HS oscillator modes selectable via configuration fuses. Typical applications for the PIC16C73B-04E/SP include industrial control systems, sensor signal conditioning with built-in ADC, low-cost motor control, HVAC thermostats, appliance controls, automotive body electronics (Extended temp range), and battery-powered instrumentation. Combined with the USART, the device is well-suited for legacy RS-232 / RS-485 networked sensors and Modbus slave nodes. When designing with this MCU, note that the OTP memory cannot be erased - prototypes should be implemented on UV-erasable CERDIP (JW) or flash-based PIC16F73 equivalents. Decoupling the VDD/VSS pins with 100 nF ceramic caps placed within 5 mm of the package, leaving MCLR reset pulled high through 10 kΩ, and respecting the 6.0 V absolute-maximum VDD are all critical design habits. This page consolidates distributor stock, drop-in cross-brand alternatives, and engineering design notes not found in any single manufacturer source.

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PIC16C73B-04I/SO - 8-Bit OTP MCU, 7KB, 22 I/O, 28-SOIC | Microchip
PIC16C73B-04I/SO

PIC16C73B-04I/SO - 8-Bit OTP MCU, 7KB, 22 I/O, 28-SOIC | Microchip

The Microchip Technology PIC16C73B-04I/SO is an 8-bit CMOS microcontroller from the PIC16C7xx mid-range family, featuring 7KB of One-Time Programmable (OTP) program memory, 192 bytes of RAM, and 22 digital I/O pins in a 28-pin SOIC (SO) package. The "-04" suffix designates a 4 MHz maximum clock input (200 ns instruction cycle), while the "I" suffix indicates the industrial operating temperature range of -40C to +85C. The device executes instructions on a Harvard RISC architecture with 35 single-word instructions, providing deterministic throughput for embedded control. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, data memory, and peripherals on one die. The PIC16C73B belongs to Microchip's PIC16 mid-range family, which sits hierarchically under the PIC16 family, then the broader PIC architecture, then Microcontrollers, then Microprocessors & Controllers, then Semiconductors. OTP (One-Time Programmable) memory is mask-ROM-like flash that can be written only once with a device programmer - cheaper than flash but not re-programmable in-circuit, suiting cost-optimized production volumes. Key features of the PIC16C73B include a 5-channel 8-bit Analog-to-Digital Converter (ADC), two 8-bit timers (Timer0 and Timer2) plus one 16-bit timer (Timer1), two Capture/Compare/PWM (CCP) modules, a synchronous Serial Peripheral Interface (SPI) or Inter-Integrated Circuit (I2C) port, and a Universal Asynchronous Receiver Transmitter (USART) for serial communication. The 28-SOIC package provides 22 I/O lines plus dedicated VDD/VSS/OSC/RESET pins, supporting through-hole replacement and surface-mount reflow at industrial volumes. The PIC16C73B uses a 14-bit instruction word and a 4-clock-per-instruction cycle, yielding 5 MIPS at 20 MHz. OTP memory is cheaper than flash and is targeted at high-volume consumer and industrial products where firmware is finalized before production. The Harvard bus architecture separates program and data memory, enabling deterministic instruction fetch and simplifying pipeline operation. Typical applications include consumer appliance controllers, industrial sensor interfaces, automotive body electronics, low-speed data acquisition systems, and embedded control boards. Designers should note that OTP parts cannot be re-programmed in-circuit and require a device programmer for firmware loading. The 28-SOIC footprint allows hand-soldering on prototype boards and standard reflow on production lines, and the SOIC-28 pinout is widely supported across the PIC16C7xx family for easy migration.

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PIC16C73B-04I/SP - 8-Bit 4MHz 7KB OTP MCU 28-SPDIP | Microchip
PIC16C73B-04I/SP

PIC16C73B-04I/SP - 8-Bit 4MHz 7KB OTP MCU 28-SPDIP | Microchip

The Microchip Technology PIC16C73B-04I/SP is an 8-bit CMOS microcontroller from the PIC16CXX mid-range family, featuring 7KB of One-Time-Programmable (OTP) program memory and 192 bytes of RAM, housed in a 28-pin SPDIP (SP) package. It operates at 4 MHz with 200 ns instruction execution and supports a supply voltage range of 4V to 5.5V. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, memory, and peripherals on a single silicon die. The 8-bit designation refers to the width of the data path and arithmetic logic unit, meaning the CPU processes data in 8-bit chunks. The PIC16C73B belongs to the mid-range PIC architecture hierarchy (PIC10/12/14/16/18/24/32), positioning it between baseline (PIC10/12/14) and enhanced mid-range (PIC18) families. Mid-range MCUs balance cost, performance, and peripheral integration, making them ideal for embedded control applications requiring moderate computational throughput. Key features of the PIC16C73B-04I/SP include five channels of 8-bit Analog-to-Digital conversion (A/D), two additional timers (Timer0, Timer1, Timer2), two Capture/Compare/PWM (CCP) modules, and a synchronous serial port configurable as either 3-wire SPI or 2-wire I2C. The device also integrates a Universal Asynchronous Receiver Transmitter (USART) for serial communication. The "I" suffix indicates the industrial temperature grade (-40C to +85C), and "04" denotes the 4 MHz maximum operating frequency. Architecturally, the PIC16C73B employs a Harvard RISC architecture with 35 single-word instructions, of which all are single-cycle except program branches which take two cycles. The OTP program memory allows one-time field programming, making the part suitable for production volumes where firmware is finalized. The 22 I/O pins support direct interfacing to sensors, actuators, and communication buses. Typical applications include industrial control systems, HVAC equipment, motor control (via CCP/PWM), sensor interfacing (via A/D converters), and consumer electronics requiring reliable 8-bit processing with mixed-signal integration. The 28-SPDIP package is suitable for through-hole assembly in legacy designs and prototyping environments. When designing with this MCU, ensure the oscillator configuration matches the application timing requirements. The industrial temperature grade makes it suitable for non-automotive harsh environments. Note that OTP memory cannot be erased, so firmware must be fully validated before programming. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.

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PIC16C73B-04I/SS - 8-Bit 4MHz OTP MCU, 7KB, 28-SSOP | Microchip
PIC16C73B-04I/SS

PIC16C73B-04I/SS - 8-Bit 4MHz OTP MCU, 7KB, 28-SSOP | Microchip

The Microchip Technology PIC16C73B-04I/SS is an 8-bit CMOS OTP (One-Time Programmable) microcontroller in the PIC16CXX mid-range family, operating at up to 4 MHz clock input with 200 ns instruction cycle, housed in a 28-pin SSOP (Shrink Small Outline Package) with industrial -40C to +85C temperature grade. What is a PIC16CXX mid-range microcontroller? The PIC16CXX family is a low-cost, high-performance, fully-static, 8-bit CMOS microcontroller series from Microchip that uses a RISC (Reduced Instruction Set Computer) architecture. Only 35 single-word instructions are needed to program the device, making it accessible for embedded engineers. The PIC16C73B specifically sits in the mid-range tier of the PIC16 family, bridging basic 5X/12X devices and more advanced 17X devices, and is upward compatible with the PIC16C5X and PIC12CXXX devices. Key features of the PIC16C73B-04I/SS include 7KB (4K x 14 words) of OTP program memory, 192 bytes of RAM data memory, 5 channels of 8-bit Analog-to-Digital (A/D) converter, 3 timers, 2 capture/compare/PWM modules, and a synchronous serial port configurable as either 3-wire SPI or 2-wire I2C bus, plus a Universal Asynchronous Receiver Transmitter (USART) for serial communication. The PIC16C73B-04I/SS uses a Harvard architecture with separate program and data buses, allowing instruction fetch and data access to occur in the same instruction cycle. The OTP memory is one-time programmable, which suits low-volume production runs and prototyping; for high-volume or field-upgradable designs, the PIC16F73 flash-based equivalent is the recommended alternative. The 28-SSOP package is roughly half the board area of a 28-DIP equivalent, enabling compact embedded designs. Typical applications include industrial control systems, automotive body electronics, sensor interface boards, low-speed communication bridges (RS-232/RS-485 via USART), and small appliance controllers. The wide -40C to +85C industrial temperature range allows the part to operate reliably in harsh factory-floor environments, while the 22 I/O pins provide ample connectivity for mixed-signal embedded designs. Designers should note that the OTP memory cannot be reprogrammed in-circuit; the part must be programmed before soldering. The 'I' suffix denotes the industrial temperature grade (-40C to +85C) and 'SS' is the 28-pin SSOP package code. For prototypes requiring iteration, consider the PIC16F73-I/SS flash equivalent. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the bare manufacturer datasheet, giving engineers a faster path to BOM decisions.

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PIC16C73B-20/SP - 8-Bit 20MHz OTP MCU 7KB 28-SPDIP | Microchip
PIC16C73B-20/SP

PIC16C73B-20/SP - 8-Bit 20MHz OTP MCU 7KB 28-SPDIP | Microchip

The Microchip Technology PIC16C73B-20/SP is an 8-bit CMOS OTP (One-Time-Programmable) microcontroller built on the PIC16CXX mid-range RISC architecture, delivering 20 MIPS throughput at 20 MHz clock input with a 200 ns instruction cycle, packaged in a 28-pin SPDIP through-hole format. The part integrates 7 KB (4K x 14) of OTP program memory, 192 bytes of RAM, and 22 digital I/O lines, and is specified for 4.0 V to 5.5 V single-supply operation over the commercial temperature range. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, data RAM, and peripherals around an 8-bit data bus. The PIC16C family belongs to the broader category of microcontrollers -> embedded controllers -> semiconductors. Mid-range PIC16C devices target cost-sensitive real-time control applications where deterministic instruction timing, low parts count, and ease of programming outweigh the need for large memory or DSP performance. OTP memory is programmed once by the user and cannot be erased, which lowers unit cost versus flash or UV-EPROM parts. Key differentiating features of the PIC16C73B include five 8-bit A/D converter channels (multiplexed onto Port A and Port E), two 16-bit timer/counters (Timer0, Timer1, Timer2), two Capture/Compare/PWM (CCP) modules, a synchronous serial port configurable as either 3-wire SPI or 2-wire I2C, and a Universal Asynchronous Receiver Transmitter (USART/LIN) port. The Harvard RISC core executes 35 single-word instructions, with all instructions completing in one cycle except program branches which take two cycles, giving an effective 5 MIPS/MHz ratio. The architecture uses a 14-bit instruction word with separate program and data buses (Harvard) which allows instruction fetch and operand read to occur in the same cycle. This is why the program memory size is given as 4K x 14 (4096 instructions x 14-bit width) rather than 7 KB of 8-bit bytes. Power consumption is governed by the four oscillator modes (RC, XT, HS, LP) and SLEEP mode with multiple wake-up sources via interrupts, watchdog timer, or port change. Typical applications include appliance control, HVAC thermostats, security and fire-alarm panels, automotive body modules (pre-CAN era), industrial motor control loops, and consumer remote controls. The combination of A/D, PWM, UART, and I2C/SPI in a single 28-pin DIP makes it well suited to subsystem control where a low-cost, deterministic 8-bit core is preferred over a 16-bit or Cortex-A-part equivalent. When designing with this device, account for OTP programming limitations - code must be 100% verified before programming because the device cannot be erased. For development, use the windowed CERDIP package (PIC16C73B-20/JW) for UV erasure. Allocate at least 10% of program memory headroom for future field updates. This page synthesizes XAIPART distributor pricing, drop-in PIC16C73B-20 alternatives, and practical design notes not collected in the Microchip datasheet, including pin-for-pin same-footprint replacements in the PIC16C7X family.

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PIC16C73B-20/SS - 20MHz 8-bit OTP MCU, 28-SSOP | Microchip
PIC16C73B-20/SS

PIC16C73B-20/SS - 20MHz 8-bit OTP MCU, 28-SSOP | Microchip

The Microchip Technology PIC16C73B-20/SS is an 8-bit CMOS OTP (One-Time Programmable) mid-range microcontroller delivering 20 MHz (200 ns instruction cycle) performance in a 28-pin SSOP package. It integrates 7 KB of program memory (4K x 14 OTP) and provides 22 digital I/O lines, 5 channels of 8-bit Analog-to-Digital conversion, 2 timers, 2 capture/compare/PWM modules, and a synchronous serial port configurable as either 3-wire SPI or 2-wire I2C, plus a dedicated USART. The /SS suffix indicates the 5.30 mm-width Shrink Small Outline Package (SSOP-28). A mid-range PIC16C family microcontroller sits within the broader 8-bit MCU taxonomy: PIC16C mid-range -> PIC16CXX family -> PIC16 8-bit core -> Microchip PIC microcontroller -> embedded controller. The PIC16C7x mid-range architecture introduced in this era extended the original PIC16C5x baseline by adding on-chip peripherals (ADC, PWM, USART, I2C/SPI) while preserving upward code compatibility with the PIC12Cxxx and PIC16C5x cores. Mid-range PIC devices are valued for predictable interrupt latency, deterministic instruction timing, and a 35-instruction RISC instruction set that engineers can master in days rather than weeks. Key features of the PIC16C73B include 192 bytes of on-chip RAM, hardware USART, an 8-bit timer/counter with optional prescaler, a watchdog timer with on-chip RC oscillator, in-circuit serial programming capability via two pins, and brown-out reset for reliable power-on behavior. The OTP memory variant (-20/SS) is windowless and suited for production-volume applications; the UV-erasable CERDIP-28 (-JW) variant is intended for prototype development and firmware iteration. Operating voltage spans 4.0 V to 5.5 V with commercial and industrial temperature grades available. Typical applications span consumer appliance control panels, small-format industrial sensor interfaces, low-bandwidth motor control using the on-chip CCP/PWM modules, smart-card readers, UPS monitoring, and HVAC damper/valve actuators. The 5-channel 8-bit ADC combined with two PWM channels is particularly well-matched to closed-loop fan control, LED brightness regulation, and brushed-DC motor velocity control, where a single chip handles sensing and actuation without external glue logic. When designing with the PIC16C73B-20/SS, observe the maximum clock frequency (20 MHz) derating across temperature and voltage - operation at the upper Vdd limit of 5.5 V is required to maintain rated timing. The SSP peripheral needs accurate pull-up resistor selection on I2C lines (typically 4.7 kohm at 400 kHz), and unused I/O should be set as outputs low to minimize shoot-through current during sleep. Because the /SS package is OTP, firmware must be fully validated before committing to programming; use the CERDIP -JW variant for development. This page synthesizes distributor pricing, drop-in same-package alternatives from the Microchip PIC16C family, and practical design notes not consolidated in the manufacturer datasheet - giving procurement and firmware engineers a single decision-ready view of the PIC16C73B-20/SS.

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PIC16C73B-20I/ML - 8-Bit 20MHz 7KB OTP MCU 28-VQFN | Microchip
PIC16C73B-20I/ML

PIC16C73B-20I/ML - 8-Bit 20MHz 7KB OTP MCU 28-VQFN | Microchip

The Microchip Technology PIC16C73B-20I/ML is a high-performance 8-bit CMOS OTP-based microcontroller built on the PIC16C architecture, offering 7KB (4K x 14) of program memory, 192 bytes of RAM, and 20 MHz maximum operating frequency in a 28-pin VQFN package with exposed thermal pad. It executes instructions in 200 ns cycles using only 35 single-word instructions, providing the rare combination of high throughput and ease of programming. Background: An 8-bit microcontroller (MCU) is a single-chip computer integrating a CPU, non-volatile program memory (here One-Time-Programmable OTP), volatile data RAM, and peripherals such as timers, ADC, and serial interfaces. The PIC16C family uses a RISC Harvard architecture that separates program and data buses for faster, deterministic instruction fetch. Within Microchip's hierarchy, PIC16C sits between the baseline PIC10/12/16 and the high-end PIC17/18, providing mid-range 8-bit capability for embedded control. Key features of this part include 22 I/O lines, 5 channels of 8-bit A/D conversion, two additional timers beyond the base PIC16C73, two capture/compare/PWM modules, and a synchronous serial port configurable as either 3-wire SPI or 2-wire I2C, plus a USART. The -20 speed grade denotes 20 MHz operation; the I suffix indicates the industrial -40C to +85C temperature range, and /ML denotes the 28-VQFN package with exposed pad for improved thermal dissipation. Architecturally, the PIC16C73B uses a 14-bit instruction word with an 8-bit data path and a 5-channel 8-bit successive-approximation ADC. The exposed-pad VQFN package allows direct PCB thermal coupling, useful in space-constrained industrial designs where the SOIC variant is too tall. Code is fully upwards compatible with PIC16C5X and PIC12CXXX devices, easing migration. Typical applications include industrial control systems, sensor interfacing, motor control (low-side PWM), appliance control, and embedded instrumentation where deterministic 8-bit performance and small footprint are required. The 5-channel ADC and PWM outputs suit closed-loop fan/valve control, while the USART and SSP support display or master MCU communication. When designing with this device, note that OTP memory cannot be reprogrammed: choose the flash-based PIC16F73 equivalent for prototyping. Use the exposed pad of the /ML package with adequate PCB copper to keep junction temperature within industrial limits. This page synthesizes distributor pricing, drop-in same-package alternatives, parametric comparison tables, and design notes drawn from the manufacturer datasheet and Microchip's PIC16C7X pin-compatibility reference, providing information gain not present on individual distributor listings.

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PIC16C73B-20I/SS - 8-Bit 20MHz OTP MCU 7KB | Microchip
PIC16C73B-20I/SS

PIC16C73B-20I/SS - 8-Bit 20MHz OTP MCU 7KB | Microchip

The Microchip Technology PIC16C73B-20I/SS is an 8-bit CMOS microcontroller in the PIC16C mid-range family, featuring a 20 MHz maximum clock, 7 KB (4K x 14) of One-Time Programmable (OTP) program memory, and 192 bytes of RAM, packaged in a 28-pin SSOP. It delivers 200 ns instruction execution and supports only 35 single-word instructions, simplifying firmware development while preserving the determinism of a RISC-based architecture. The "I" suffix denotes the industrial operating temperature range of -40C to +85C and a 4.0 V to 5.5 V supply voltage. An 8-bit microcontroller is a single-chip computer that integrates a CPU, RAM, program memory, and peripheral blocks (timers, A/D, USART, I/O) into one package. Microcontrollers sit at the base of the embedded hierarchy: 8-bit MCU -> mid-range MCU -> microcontroller -> embedded controller -> semiconductor. They excel in deterministic, low-power, cost-sensitive control tasks rather than computationally heavy workloads. The PIC16C series specifically targets the mid-range segment with 14-bit instruction word width, providing more code density than baseline 12-bit PIC cores while remaining lower in cost than 16-bit PIC24/dsPIC families. Key features include 22 digital I/O pins, three timers (Timer0, Timer1, Timer2), two capture/compare/PWM modules, a synchronous/asynchronous USART, an 8-bit A/D converter with 5 input channels, and an 8-bit parallel slave port. The device also incorporates a watchdog timer with its own on-chip RC oscillator for reliable recovery from software lockups, in-circuit serial programming (ICSP) capability, and power-saving SLEEP mode that drops quiescent current to a few microamps. Brown-out reset is implemented to protect Flash/EPROM during unstable supply events. The PIC16C73B is built on a fully-static CMOS process, so the clock can be stopped without losing register state, an important attribute for low-power applications. Two oscillator modes are supported: a low-power LP crystal (up to 200 kHz) and a high-speed HS crystal (up to 20 MHz). The architecture is fully upward-compatible with the PIC16C5X baseline and PIC12CXXX devices, enabling easy code reuse within the family. Typical applications include industrial control (sensor interfacing, motor control via PWM, simple PLCs), automotive body electronics (window lifters, climate modules, instrument clusters), consumer appliances (washing machines, microwave ovens, remote controls), and instrumentation front-ends (digital panel meters, simple data loggers). The wide operating temperature range and robust peripheral set make it well-suited to harsh industrial environments where reliability is paramount. When designing with the PIC16C73B-20I/SS, note that OTP memory cannot be erased; for development cycles select a windowed CERDIP part (PIC16C73B-20/P) or a flash-based PIC16F73. The SSOP-28 footprint has a thermal pad behavior identical to SOIC, so standard SOIC-28 PCB layouts can usually accommodate this part. Decoupling requires a 0.1 microfarad ceramic capacitor close to VDD with a bulk electrolytic on the same rail. This page synthesizes distributor pricing, drop-in alternative cross-references, application circuit examples, and design notes that the manufacturer datasheet alone does not provide. Engineers searching for a PIC16C73B-20I/SS replacement, second source, or alternate supplier will find the alternatives table, comparison matrix, and selection guide especially valuable for procurement risk mitigation.

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PIC16C73B/JW - 8-Bit 20MHz MCU 7KB EPROM UV Window CDIP-28 | Microchip
PIC16C73B/JW

PIC16C73B/JW - 8-Bit 20MHz MCU 7KB EPROM UV Window CDIP-28 | Microchip

The Microchip Technology PIC16C73B/JW is an 8-bit, 20MHz, CMOS, EPROM-based microcontroller in the PIC16CXX mid-range family, packaged in a 28-pin ceramic DIP (CerDIP) with a UV-erasable quartz window. It executes instructions in 200ns (5 MIPS at 20MHz), supports 35 single-word instructions, and integrates 7KB (4K x 14) of UV-erasable EPROM program memory and 192 bytes of user RAM. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, working RAM, and programmable I/O peripherals. The PIC16C73B belongs to the mid-range PIC16C family, positioned between the baseline PIC12C/PIC16C5X and the enhanced PIC17C/PIC18C architectures. The /JW suffix denotes a windowed ceramic DIP package intended for development, prototyping, and code iteration via UV erasure, while the production-grade PIC16C73B-20/SO and PIC16C73B-20/SP variants ship in one-time-programmable (OTP) plastic packages. Key features include five channels of 8-bit A/D conversion (the PIC16C73A's three channels were doubled in the B revision), two 8-bit timer/counters plus a 16-bit Timer1 with external crystal/clock increment in SLEEP, two Capture/Compare/PWM modules, a synchronous serial port configurable as 3-wire SPI or 2-wire I2C, and a USART. Upwards compatibility with the PIC16C5X and PIC12CXXX preserves software investment across product generations. Typical applications include industrial sensor signal acquisition, motor control loops using the CCP modules, embedded serial-communication bridges (SPI/I2C/USART), prototyping platforms for PIC16C firmware development, and legacy automotive or HVAC controllers designed in the late 1990s and early 2000s. The UV window enables iterative erase/reprogram cycles during design validation, while production builds typically migrate to the OTP plastic DIP or SOIC variants for cost reasons. When designing with this MCU, note that the PIC16C73B/JW is in production-discontinued status - the JW windowed CerDIP package is supplied for legacy and hobbyist use, with lead times varying across distributors. For new designs, migrate to the PIC16F73 flash-based equivalent in 28-pin PDIP or SOIC. For drop-in development, the ceramic-windowed variant is electrically identical to its OTP counterpart, only the package and erase mechanism differ.

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PIC16C73BT-04/SO - 4MHz 8-bit OTP MCU, 7KB EPROM, 22 I/O | Microchip
PIC16C73BT-04/SO

PIC16C73BT-04/SO - 4MHz 8-bit OTP MCU, 7KB EPROM, 22 I/O | Microchip

The Microchip Technology PIC16C73BT-04/SO is an 8-bit CMOS RISC microcontroller from the PIC16CXX mid-range family, offered in a 28-pin SOIC wide-body package (SO) on Tape & Reel. According to the manufacturer datasheet, it integrates 7 KB of one-time-programmable (OTP) program memory (4K x 14 words), 192 bytes of RAM, 22 digital I/O pins, and a 5V operating core. The "/04" speed grade designates a 4 MHz maximum oscillator input, yielding a 200 ns instruction cycle on a four-clock-per-instruction pipeline. A microcontroller (MCU) is a single-chip computer containing a CPU core, non-volatile program memory, working RAM, and peripheral set on one die. The PIC16CXX mid-range family sits in the PIC16/17/18/24 hierarchy: PIC16 -> 8-bit PIC mid-range -> PIC16CXX OTP/EPROM family -> PIC16C73B sub-family. The OTP architecture lets the user program the device once via an EPROM-style cell; it cannot be electrically erased, so this part is intended for mature production code rather than field-updatable designs. Key features of the PIC16C73BT-04/SO include a Harvard RISC CPU with only 35 single-word instructions, an integrated 8-channel 8-bit analog-to-digital converter (ADC), a USART, an MSSP (SPI/I2C) peripheral, two 8-bit timers plus one 16-bit timer with capture/compare/PWM, and a synchronous serial port. Brown-out reset, watchdog timer, power-on reset, and code protection complete the on-chip feature set, making the part suitable for industrial control panels, appliance motor control, instrumentation front-ends, and white-goods embedded designs. The architecture follows the classic PIC RISC pipeline: one instruction is fetched every clock and executed in four clocks, with a two-stage pipelined design. The CPU uses separate program and data buses (Harvard) so each instruction fetch does not contend with data accesses, enabling deterministic 200 ns instruction execution at the 4 MHz oscillator rating. The internal 8-bit data path pairs with the 14-bit instruction word to give a compact code density typical of mid-range PIC silicon. Typical applications for the PIC16C73BT-04/SO include industrial automation sensor interfaces, low-cost HVAC control boards, motor drive signal conditioning, smart sensor analog front-ends, white-goods control (washing machines, refrigerators), and embedded instrumentation. The 22 I/O and integrated ADC remove the need for external glue logic, allowing tight PCB layouts in 5V designs. When designing with this part, plan for the OTP programming constraint: code must be fully validated in development before the production programming step, since EPROM windowed versions are not field-erasable. Account for the SOIC-28 thermal envelope and use proper decoupling: a 0.1 uF ceramic close to VDD plus a bulk electrolytic near the supply pin will keep ADC SNR clean in mixed-signal layouts. This page synthesizes current distributor pricing, drop-in same-family alternatives from the Site MPN list, and design notes that go beyond the manufacturer datasheet to help engineers select and source the PIC16C73BT-04/SO.

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PIC16C73BT-04/SS - 4MHz 8-Bit OTP MCU, 7KB, 28-SSOP | Microchip
PIC16C73BT-04/SS

PIC16C73BT-04/SS - 4MHz 8-Bit OTP MCU, 7KB, 28-SSOP | Microchip

The Microchip Technology PIC16C73BT-04/SS is an 8-bit RISC microcontroller in the PIC16CXX mid-range family, featuring 7KB (4K x 14) One-Time Programmable (OTP) program memory, 192 bytes of RAM, and a maximum operating frequency of 4 MHz, housed in a 28-pin Shrink Small Outline Package (SSOP, 0.209-inch / 5.30 mm body width). The 'T' suffix indicates tape-and-reel delivery, the '-04' denotes the 4 MHz speed grade, and '/SS' confirms the SSOP package code, making this an industrial-grade part in Microchip's classic OTP lineup. An 8-bit microcontroller (MCU) is a programmable processor with an 8-bit data path that integrates a CPU, non-volatile program memory, working RAM, and peripheral interfaces on a single silicon die. Within the broader semiconductor taxonomy, an MCU belongs to the class of microcontrollers, which sit under microprocessors, integrated circuits (ICs), and ultimately semiconductors. The PIC16C mid-range family occupies the middle tier of Microchip's portfolio, above the PIC16C base line and below PIC17C/PIC18 enhanced devices, balancing instruction simplicity, deterministic timing, and peripheral richness for cost-sensitive embedded designs. Key features of the PIC16C73BT-04/SS include five 8-bit I/O ports, three timers (Timer0, Timer1, Timer2), a USART with SPI/I2C master capability, an 8-bit ADC with 5 analog input channels, and a capture/compare/PWM (CCP) module. The device operates across a commercial 0 °C to +70 °C temperature window, accepts a supply voltage of 2.5 V to 6.0 V, and provides 25 mA source/sink per I/O pin to drive LEDs and small loads directly. The OTP program memory is one-time programmable, which is suitable for mature, fixed-code production rather than in-field firmware updates. Technically, the PIC16C73BT-04/SS uses a 14-bit instruction word and a Harvard architecture with separate program and data buses, executed through a pipelined RISC engine producing most instructions in a single instruction cycle (4 oscillator clocks). This yields ~1 MIPS at 4 MHz, well-matched to slow control loops, sensor reading, and human-interface tasks rather than high-throughput DSP workloads. The integrated brown-out reset, watchdog timer, and power-on reset reduce the need for external supervisory components in harsh or battery-powered systems. Typical applications include industrial control panels, appliance control boards, automotive body electronics (non-safety), consumer white goods, sensor signal conditioning front ends, and low-cost remote-control / IR transmitter nodes. In each case the part's small memory size, deterministic interrupt latency, and integrated peripherals reduce total BOM cost while keeping firmware complexity manageable. When designing with the PIC16C73BT-04/SS, ensure the supply rail is decoupled with a 100 nF ceramic capacitor close to VDD and that the MCLR pin is tied high through a resistor for normal operation. Because OTP memory cannot be erased, design engineers must commit the firmware image before volume programming - prototype validation should use a windowed (JW) or Flash (PIC16F73) variant during development.

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PIC16C73BT-04E/SS - 8-Bit 4MHz OTP MCU 7KB Flash | Microchip
PIC16C73BT-04E/SS

PIC16C73BT-04E/SS - 8-Bit 4MHz OTP MCU 7KB Flash | Microchip

The Microchip Technology PIC16C73BT-04E/SS is an 8-bit CMOS microcontroller from the PIC16CXX mid-range family, featuring a 4 MHz maximum operating frequency, 7 KB (4K x 14) of One-Time Programmable (OTP) program memory, 192 bytes of RAM, and 22 digital I/O pins, housed in a 28-pin SSOP (5.30 mm body width) surface-mount package. The part integrates a 5-channel 8-bit Analog-to-Digital Converter (ADC), one 8-bit and one 16-bit timer, an enhanced USART, an MSSP module supporting both I2C and SPI, and a 5-bit parallel slave port. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, working RAM, peripheral interfaces, and I/O lines on one silicon die. Microcontrollers sit at the bottom of the embedded computing hierarchy: microcontroller -> embedded processor -> computer-on-module. Within Microchip's portfolio, the PIC16C family is a mid-range 8-bit architecture with a 14-bit instruction word, positioned above the baseline PIC16C5x family but below the PIC18 8-bit extended family and the PIC24/dsPIC 16-bit families. Key features of the PIC16C73BT-04E/SS include a 35-instruction RISC-style set, 4 MHz operation from a 4.0 V to 5.5 V single supply, on-chip Power-On Reset (POR), Brown-Out Reset (BOR), Watchdog Timer with its own on-chip RC oscillator, in-circuit serial programming via two pins, and an operating temperature range of -40 C to +125 C qualified under the "E" (extended) designation. The architecture uses Harvard-style separate program and data buses with 14-bit instructions and 8-bit data paths. Typical applications include industrial control front-ends, sensor conditioning with the on-chip ADC, simple user-interface controllers with keypad and LCD scanning, low-speed UART-bridge gateways, and legacy automotive or appliance subsystems that retain a 28-pin 0.65 mm pitch SSOP socket. The wide temperature range and integrated peripherals make it suitable for factory-floor and white-goods designs where external components must be minimized for BOM cost reasons. When designing with this part, note that OTP memory cannot be erased or rewritten, so firmware must be fully validated before programming. Designers targeting in-the-field firmware updates should consider the flash-based PIC16F73 sibling instead, which shares the same pinout and peripheral set but uses Flash program memory.

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PIC16C73BT-04I/SS - 8-Bit 4MHz MCU, 7KB OTP, 28-SSOP | Microchip
PIC16C73BT-04I/SS

PIC16C73BT-04I/SS - 8-Bit 4MHz MCU, 7KB OTP, 28-SSOP | Microchip

The Microchip Technology PIC16C73BT-04I/SS is a high-performance 8-bit CMOS microcontroller from the PIC16CXX mid-range family, operating at 4 MHz with 7 KB (4K x 14) of One-Time-Programmable (OTP) program memory and 192 bytes of RAM, housed in a 28-pin SSOP package supplied on Tape & Reel. The part carries the industrial temperature grade ("I" suffix) and the "T" tape-and-reel packaging suffix. A PIC microcontroller (also called MCU - Microcontroller Unit) is a self-contained computer-on-a-chip integrating an 8-bit RISC CPU core, non-volatile program memory, working RAM, peripheral set (I/O ports, timers, A/D converter, USART, SPI/I2C), and brown-out / watchdog circuitry on a single silicon die. PIC16C73B sits inside the mid-range PIC16 architecture (PIC16CXX), itself a branch of Microchip's 8-bit PIC family - one of the longest-running, most license-friendly MCU architectures in the industry, known for deterministic single-cycle execution across all but branch instructions. Key features include 22 digital I/O pins, an on-chip 8-channel 8-bit A/D converter, two 8-bit timers plus one 16-bit timer with capture/compare/PWM, a USART with SPI master-mode and I2C (Master/Slave), an 8-level hardware stack, and 35 single-word instructions. Operating voltage is 4.0 V to 5.5 V from a single rail, and the industrial temperature range covers -40 °C to +85 °C. Brown-out reset, power-on reset, watchdog timer and code-protection are all integrated. The architecture is fully static CMOS with Harvard-style separate program and data buses, an internal 8-bit data path and a 14-bit instruction word, plus a programmable code-protection scheme. The 4 MHz clock rate, combined with a 4 Tcy per instruction cycle pipeline, gives an effective 1 MIPS instruction throughput, which is more than sufficient for motor control, sensor interfaces and small protocol bridges. Typical applications include industrial automation controllers, consumer electronics appliances, automotive body and comfort modules, instrument front-ends with analog signal acquisition, and battery-friendly white-goods control boards. The 28-SSOP footprint and rich peripheral mix make it well suited to designs where PCB real estate is constrained but multiple analog channels and a serial interface are required. When designing with this part, place a 0.1 µF decoupling capacitor as close as possible to VDD, keep analog AVss/AVdd routing separate from digital returns, and confirm the chosen OTP programmer supports the 28-SSOP package variant. OTP memory cannot be erased; for iterative development the equivalent Flash-based PIC16F73 may be a more practical engineering choice. This page synthesizes distributor stock and pricing, drop-in alternatives, and practical design considerations not found in the manufacturer datasheet alone.

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