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PIC16C73A-04I/SP - 8-Bit 4MHz OTP MCU 7KB | Microchip
PIC16C73A-04I/SP

PIC16C73A-04I/SP - 8-Bit 4MHz OTP MCU 7KB | Microchip

The Microchip PIC16C73A-04I/SP is an 8-bit CMOS microcontroller based on the PIC16 mid-range RISC core, offering 7KB (4K x 14) of one-time programmable (OTP) program memory, 192 bytes of RAM, and 22 digital I/O pins in a 28-pin SPDIP package. It operates at 4 MHz with a 200 ns instruction cycle, supports an industrial temperature range of -40C to +85C, and integrates a 5-channel 8-bit Analog-to-Digital Converter (ADC), one Capture/Compare/PWM (CCP) module, a USART, and a synchronous serial port (SSP) for SPI/I2C. A microcontroller (MCU) is a single-chip computer containing a CPU, memory (program + data), and programmable I/O peripherals. The PIC16C73A belongs to the PIC16CXX mid-range family, which uses a Harvard architecture with separate program and data buses, an accumulator-based ALU, and a compact 35-instruction instruction set where most instructions execute in a single 200 ns cycle at 4 MHz. This category sits below 16-bit and 32-bit MCUs in capability but excels in deterministic real-time control with very low cost. Key features include 4 MHz maximum clock speed, 5 MIPS throughput, 25 mA source/sink current per I/O, integrated brown-out reset, power-on reset, watchdog timer with its own on-chip RC oscillator, and an EPROM-based program memory that allows windowed erasure for prototype iteration. The 'A' revision improved ADC accuracy and added the enhanced CCP module compared to the original PIC16C73. The architecture uses a 14-bit instruction word and an 8-bit data path, with separate program and data buses preventing pipeline stalls. The integrated 8-bit ADC achieves 8-bit resolution across up to 5 input channels with conversion completed by successive approximation. The device operates over a 2.5V to 6.0V supply range with typical 5V/4 MHz active current of 15 uA, demonstrating CMOS-class low power for industrial embedded designs. Typical applications include industrial control systems, automotive body electronics, sensor signal conditioning, motor drive interfaces, and consumer appliance controllers. The integrated ADC and CCP module make the PIC16C73A well suited for closed-loop analog control such as temperature regulation, fan speed control, and battery charging. When designing with this OTP device, consider that program memory is one-time programmable and cannot be erased in-circuit; for in-system reprogrammability, consider the pin-compatible PIC16F73 with Flash memory. The I suffix denotes industrial temperature grade (-40C to +85C), and the SP suffix denotes 28-pin SPDIP through-hole package. This page synthesizes distributor pricing, drop-in alternatives within the PIC16C7x family, and practical design notes not found in the manufacturer datasheet alone.

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PIC16C73A-10/SO - 8-Bit OTP MCU 7KB 22 I/O SOIC-28 | Microchip
PIC16C73A-10/SO

PIC16C73A-10/SO - 8-Bit OTP MCU 7KB 22 I/O SOIC-28 | Microchip

The Microchip Technology PIC16C73A-10/SO is a 8-bit CMOS microcontroller from the PIC16C7X mid-range family, integrating 7KB (4K x 14) of One-Time-Programmable (OTP) program memory and 192 bytes of RAM in a 28-pin SOIC package. It operates up to 10 MHz with a 4V to 5.5V supply range, exposing 22 digital I/O lines and a 5-channel 8-bit Analog-to-Digital Converter (ADC) for mixed-signal embedded designs. The -10 speed grade corresponds to a 10 MHz oscillator, supporting instruction cycle times of 400 ns with a 4:1 clock divider. An 8-bit microcontroller is a single-chip computer built around an 8-bit data path, optimized for control-oriented tasks in embedded systems. Within the broader taxonomy, the PIC16C73A belongs to the mid-range PIC16 family (8-bit MCU -> microcontroller -> MCU -> embedded processor -> semiconductor). It sits between low-pin PIC10/12 devices and high-performance PIC18 parts, balancing code density, peripheral integration, and cost. CMOS process technology delivers the low standby current (under 1 uA typical at 3V/32 kHz) that defines Microchip's nanoWatt-class PIC legacy. Key features include the Harvard RISC architecture with only 35 single-word instructions, 14-bit wide instruction word, 8-bit data path, and 25 mA source/sink current on digital I/O capable of directly driving LEDs and small relays. The integrated ADC and capture/compare/PWM modules enable motor-control, sensor-conditioning, and lighting applications without external analog ICs. The OTP memory allows one-time field programming, lowering unit cost versus windowed or flash versions. Typical applications span industrial control panels, automotive body electronics, appliance control boards, sensor signal conditioning, and low-cost consumer devices where integrated ADC simplifies BOM. The wide commercial/industrial/extended temperature range supports harsh-environment deployments. Designers migrating from PIC16C73A are advised to evaluate PIC16C73B (drop-in successor) or PIC16F73 (flash-based alternative) per Microchip's official guidance. When designing with this part, ensure oscillator stability at 10 MHz with appropriate load capacitors, and observe the maximum source/sink current per pin (25 mA) and per-port aggregate limits specified in the manufacturer datasheet. Brown-out and watchdog features are not integrated on this OTP revision; external supervisory ICs may be required for safety-critical applications. This page synthesizes real-time distributor pricing (LCSC, DigiKey, Heisener, Octopart), Microchip-recommended drop-in alternatives (PIC16C73B, PIC16F73), and engineering-oriented design notes not collated on any single datasheet or distributor page.

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PIC16C73A-10/SP - 8-Bit 10MHz 7KB OTP MCU 28-SPDIP | Microchip
PIC16C73A-10/SP

PIC16C73A-10/SP - 8-Bit 10MHz 7KB OTP MCU 28-SPDIP | Microchip

The Microchip PIC16C73A-10/SP is an 8-bit CMOS RISC microcontroller with integrated Analog-to-Digital Converter, packaged in a 28-pin SPDIP (Skinny Plastic DIP) through-hole format. It delivers 10 MHz maximum clock speed with 7 KB (4K x 14) of OTP (One-Time-Programmable) program memory and 192 bytes of data RAM, providing 22 digital I/O pins, three timers, a USART, an SSP, and a 5-channel 8-bit ADC. An 8-bit microcontroller is a single-chip computer built around an 8-bit data bus and a Harvard architecture. Within the broader semiconductor taxonomy it sits under microcontroller -> MCU -> embedded processor -> semiconductor device. The PIC16CXX mid-range family from Microchip is one of the longest-lived 8-bit architectures in the industry and is widely used in industrial control, automotive body electronics, and consumer appliances where deterministic instruction timing and low cost outweigh raw compute throughput. Key features of the PIC16C73A-10/SP include 35 single-word instructions, all single-cycle except program branches (two cycles), 5 MIPS sustained throughput at 20 MHz, supply voltage range of 4.0 V to 5.5 V, and low-power consumption with typical 15 µA active current at 5 V/4 MHz and 1 µA standby at 3 V/32 kHz. The device supports high sink/source current of 25 mA per pin and operates across commercial, industrial, and extended temperature ranges. Interrupt handling, watchdog timer, and power-on reset are all integrated. The PIC16C73A employs a RISC architecture with a two-stage pipeline and a 14-bit wide instruction word. The 8-bit ALU operates on data RAM, while the program store is accessed over a separate 14-bit bus, allowing instruction fetch and data access in the same cycle. This Harvard topology, combined with the 35-instruction RISC set, gives the part its deterministic 200 ns instruction cycle time at 20 MHz. The integrated ADC uses successive-approximation with analog input multiplexing across 5 channels. Typical applications include industrial control and automation, HVAC and building controls, automotive body and chassis subsystems, low-end consumer appliances, sensor signal conditioning front-ends, and battery-powered instrumentation. The wide operating voltage range and industrial temperature grade make it well suited to factory floor deployments. When designing with this device, note that the OTP memory cannot be re-programmed, so production firmware must be fully validated before wafer programming. The /MCLR reset pin requires a precise RC rise time, and the ICSP interface shares pins with PORTC, so isolation resistors may be needed in-circuit. This page synthesizes current distributor pricing, drop-in alternatives drawn from the Microchip PIC16C7X family, and practical design notes not found in the manufacturer datasheet.

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PIC16C73A-10E/SO - 8-bit OTP MCU 7KB EPROM 10MHz | Microchip
PIC16C73A-10E/SO

PIC16C73A-10E/SO - 8-bit OTP MCU 7KB EPROM 10MHz | Microchip

The Microchip Technology PIC16C73A-10E/SO is an 8-bit CMOS microcontroller from the PIC16CXX mid-range family with integrated 10-bit Analog-to-Digital converter, 7KB (4K x 14) One-Time Programmable EPROM program memory, 192 bytes of user RAM, and 22 digital I/O lines, all housed in a 28-pin SOIC (SO) wide-body package. The "-10E" suffix denotes a 10 MHz maximum operating frequency and the "E" (Extended) temperature grade covering -40C to +125C, while "/SO" specifies the plastic small-outline gull-wing package shipped in tube packaging. A PIC16CXX mid-range 8-bit microcontroller is a Harvard-architecture RISC device that executes one instruction per instruction cycle (4 clock periods) and supports 35 single-word instructions, which together provide up to 5 MIPS performance at 20 MHz. It belongs to the broader hierarchy: microcontroller -> embedded MCU -> 8-bit MCU -> PIC16 family -> PIC16C7x sub-family, and is commonly used as a drop-in classic-PIC platform for embedded control where program memory can be one-time-programmed at production time rather than re-flashed in the field. Key features include a 10 MHz oscillator (10 MIPS class core speed), an integrated multi-channel 10-bit ADC, three timer modules (Timer0, Timer1, Timer2), a synchronous/asynchronous USART, an SSP/SPI/I2C peripheral, five channels of 8-bit PWM (CCP module), and interrupt capability with both edge-selectable external interrupts and peripheral interrupts. The device operates from 2.5 V to 6.0 V, supporting 25/25 mA sink/source current per I/O, 15 µA typical standby at 5 V / 4 MHz, and 1 µA typical standby at 3 V / 32 kHz. The EPROM-based architecture requires a quartz windowed package (CERQUAD) for erasure; the SOIC version is therefore intended for one-time-programmed production units. Typical applications span industrial process controllers, automotive body/comfort electronics, sensor-signal conditioning front-ends, and appliance control boards, where the integrated ADC and PWM peripherals reduce external component count. Because the PIC16C73A is EPROM-based and superseded by the flash-based PIC16F73/PIC16C73B, Microchip's official product page recommends PIC16C73B or PIC16F73 for new designs.

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PIC16C73A-10I/SO - 8-Bit 10MHz OTP MCU 7KB | Microchip
PIC16C73A-10I/SO

PIC16C73A-10I/SO - 8-Bit 10MHz OTP MCU 7KB | Microchip

The Microchip Technology PIC16C73A-10I/SO is an 8-bit CMOS RISC microcontroller from the PIC16C7X family, featuring 7KB (4K x 14) of One-Time-Programmable (OTP) program memory, 192 bytes of RAM, and 22 digital I/O lines, all integrated in a 28-pin SOIC (SO) package. It operates at a 10MHz clock speed and supports a supply voltage range of 4.0V to 6.0V with industrial-grade temperature tolerance (-40C to +85C), as indicated by the "I" suffix in its part number. A microcontroller (MCU) is a single-chip computer containing a processor core, memory, and programmable I/O peripherals. The PIC16C7X family is part of the PIC16CXX mid-range architecture, which combines 35 single-word instructions with Harvard-bus architecture (separate program and data buses). This split-bus design lets the CPU fetch an instruction and read data simultaneously, which is why most instructions execute in a single instruction cycle, except program branches which take two cycles. OTPs are programmed once with a device programmer and cannot be erased, making them a cost-effective choice for mature, stable production volumes. Key specifications include a 10MHz maximum oscillator frequency, an integrated 8-channel 8-bit Analog-to-Digital Converter (ADC) with 5 analog inputs multiplexed onto PORTA/PORTE, three timer modules (Timer0, Timer1, Timer2), a Universal Synchronous Asynchronous Receiver Transmitter (USART), a Capture/Compare/PWM (CCP) module, and 22 high-current I/O lines rated at 25 mA sink/source. The architecture uses a two-stage instruction pipeline with an 8-bit ALU and a 14-bit instruction word. Typical applications include industrial control, instrumentation, sensor signal conditioning, motor control loops, and embedded systems with analog sensing where the integrated ADC and USART minimize external component count. Microchip recommends considering PIC16C73B or PIC16F73 as newer functionally-compatible replacements for new designs, since the PIC16C73A is now in the mature/legacy phase of its product lifecycle. When designing with this part, plan OTP programming in the production flow because once programmed, parts cannot be erased or rewritten. Use the in-circuit serial programming (ICSP) interface and ensure programming voltage (VPP) timing meets Microchip's specification. The high-current I/O lines allow direct LED or small-signal relay drive without external buffers in many cases. This page synthesizes distributor pricing, lifecycle status, recommended drop-in alternatives, and practical design notes that go beyond the manufacturer datasheet, including a side-by-side comparison with PIC16C73A variants and PIC16C73B successors.

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PIC16C73A-20/SO - 8-bit 20MHz 7KB OTP MCU 28-SOIC | Microchip
PIC16C73A-20/SO

PIC16C73A-20/SO - 8-bit 20MHz 7KB OTP MCU 28-SOIC | Microchip

The Microchip Technology PIC16C73A-20/SO is an 8-bit CMOS 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 lines, all integrated into a 28-pin SOIC (SO) package. It executes instructions at a 20 MHz clock rate with a 200 ns instruction cycle, delivering up to 5 MIPS of throughput from a high-performance RISC CPU that supports only 35 single-word instructions. An 8-bit microcontroller (MCU) is a programmable integrated circuit containing a CPU, memory, and peripherals on a single die. Within the broader taxonomy, an 8-bit MCU is a member of the microcontroller family, which itself is a subcategory of microcontrollers > microprocessors > semiconductors. The PIC16C73A belongs specifically to Microchip's mid-range PIC16CXXX architecture, which evolved into today's enhanced mid-range PIC16FXXX family. Compared with 16-bit and 32-bit MCUs, 8-bit parts like this one trade raw compute throughput for deterministic timing, low cost, and extreme code density in embedded control applications. Key specifications include an operating voltage range of 4.0V to 5.5V (with the industrial -I variant supporting 2.5V-6.0V), 8-channel 8-bit A/D converter, three timer modules (Timer0, Timer1, Timer2), a USART, and a synchronous serial port (SPI/I2C) configurable via the MSSP peripheral. The device supports typical operating currents below 2 mA at 5V/4 MHz and standby currents under 1 µA, making it suitable for power-sensitive embedded designs. Integrated peripherals replace external glue logic and reduce BOM cost in motor control, instrumentation, and consumer appliances. Architecturally, the PIC16C73A uses a Harvard memory structure with separate program and data buses, allowing instruction fetch and operand read to occur in the same cycle. The OTP EPROM-based program memory is one-shot programmable via a standard device programmer, providing flexibility for low- to mid-volume production. The part is specified for the commercial 0°C to +70°C range in the -20 version and the industrial -40°C to +85°C range in the -20I variant. Typical applications include industrial control systems, automotive body electronics, sensor signal conditioning, low-speed data acquisition, smart sensor hubs, and home appliance controllers. The integrated ADC, timers, and serial peripherals allow direct connection to analog sensors, keypad matrices, and communication buses without external ICs. When designing with this part, note that it has been superseded by the PIC16C73B and PIC16F73 (Flash-based) variants. New designs should generally migrate to the PIC16F73 or current PIC16F1xxx family for supply longevity. For existing designs with mature firmware, the PIC16C73A-20/SO remains a supported legacy part with active distributor inventory per Microchip's product page. This page synthesizes distributor pricing across DigiKey, Mouser, LCSC, Octopart and other channels, drop-in same-family Microchip alternatives, and practical design notes not consolidated in the manufacturer datasheet, giving engineers a single-source comparison for sourcing decisions.

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PIC16C73A-20/SP - 8-bit 20MHz MCU 7KB OTP 28-SPDIP | Microchip
PIC16C73A-20/SP

PIC16C73A-20/SP - 8-bit 20MHz MCU 7KB OTP 28-SPDIP | Microchip

The Microchip Technology PIC16C73A-20/SP is an 8-bit CMOS RISC microcontroller with integrated analog-to-digital converter, 7KB (4K x 14) OTP program memory, 192 bytes of RAM, and 22 I/O pins, operating at 20 MHz from a 4.0V to 5.5V supply, packaged in a 28-pin SPDIP (SP) through-hole windowed CERDIP variant. An 8-bit microcontroller (microcontroller IC) is a single-chip computer that integrates a CPU, memory, and peripherals. The PIC16C73A belongs to the PIC16C family, part of the PIC® mid-range microcontroller family, which itself falls under the broader category of microcontrollers -> microcomputer ICs -> embedded processors -> semiconductors. The PIC16C7X line was designed as low-cost, high-performance, fully-static CMOS 8-bit microcontrollers with on-chip ADC. Key features include a high-performance RISC CPU with only 35 single-word instructions, all single-cycle except program branches (two cycles), wide operating voltage range up to 6.0V, 25/25 mA high sink/source current on I/O pins, and very low power consumption (5 mA typical at 5V/4 MHz and 1 µA typical standby at 3V/32 kHz). The integrated 8-bit ADC and 22 I/O pins enable direct interfacing to analog sensors and digital peripherals. The device uses a Harvard architecture with separate program and data paths. The 7KB OTP (one-time programmable EPROM) memory holds firmware, while 192 bytes of RAM store volatile data. Three timer/counters, a synchronous serial port (SSP) for SPI/I2C, a USART, capture/compare/PWM module, and an 8-channel 8-bit ADC are integrated on-chip, reducing external component count. Typical applications include industrial control systems, automotive body electronics, motor control, sensor signal conditioning, and embedded control in appliances. The integrated ADC suits direct analog sensor interfaces, and the 22 I/O lines accommodate keyboards, displays, and relay drivers. When designing with this device, ensure OTP programming is performed before final assembly as the memory cannot be erased. For prototyping, the windowed CERDIP variant allows UV erasure. Decoupling capacitors of 0.1 µF near VDD and a bulk capacitor near the IC are recommended. Watchdog timer should be enabled for unattended reset recovery. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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PIC16C73A-20E/SP - 8-Bit 20MHz 7KB OTP MCU 28-SPDIP | Microchip
PIC16C73A-20E/SP

PIC16C73A-20E/SP - 8-Bit 20MHz 7KB OTP MCU 28-SPDIP | Microchip

The Microchip Technology PIC16C73A-20E/SP is an 8-bit CMOS RISC microcontroller with 7 KB (4K x 14) one-time-programmable (OTP) EPROM program memory, 192 bytes of RAM, and 22 digital I/O lines, housed in a 28-pin SPDIP (SP) through-hole package. It executes most instructions in a single 200 ns cycle at 20 MHz (5 MIPS), supports a 4.0–5.5 V supply, and integrates a 5-channel 8-bit A/D converter plus a USART/SPI/I2C-compatible synchronous serial port. A PIC16C-series microcontroller is a member of Microchip's mid-range 8-bit MCU family, which sits below the enhanced PIC18 family and above the baseline PIC10/12/16 families in performance and peripheral integration. PIC16C devices use a RISC-like Harvard architecture with 14-bit wide program words and 8-bit data, and the 'C' suffix denotes EPROM (erasable windowed) or OTP program memory rather than flash. This integrated part is the PIC16C73A-20E/SP variant, which combines the 'A'-revision silicon with 20 MHz maximum clock and an industrial temperature grade (-40C to +125C). Key differentiating features include 35 single-word instructions (all single-cycle except branches), 8 hardware interrupt sources, a 4-word-deep hardware stack, power-saving SLEEP mode with Watchdog Timer wake-up, and a Capture/Compare/PWM (CCP) module. The device is engineered for deterministic real-time control where 5 MIPS sustained throughput and predictable interrupt latency simplify firmware development. Architecturally, the PIC16C73A uses an 8-bit ALU fed from a 14-bit instruction bus and a separate 8-bit data bus, with peripheral features accessed through a banked special-function register file. The 5-channel successive-approximation ADC delivers 8-bit resolution in approximately 19 us, and the USART can be configured for asynchronous or synchronous serial communication at up to 5 Mbps (synchronous). Typical applications include industrial automation control, automotive body electronics, sensor signal conditioning with on-chip ADC, appliance motor control via the CCP module, and consumer-product embedded controllers. The wide 4.0–5.5 V supply and -40C to +125C operating range allow deployment in harsh environments. When designing with this MCU, allocate adequate decoupling (100 nF + 10 uF) near VDD/AVDD/VSS/AVSS, configure the MCLR pin properly with the required 50 ns rise time, and reserve one capture/compare/PWM channel if closed-loop control is required. The EPROM (windowed/OTP) program memory means the die cannot be electrically erased; use a Flash-based PIC16F73 or PIC16C73B for in-system reprogramming during development. This page synthesizes distributor pricing across 8 sources, pin-compatible drop-in alternatives, and design notes that supplement the manufacturer datasheet with practical integration guidance.

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PIC16C73A-20I/SO - 8-Bit 20MHz OTP MCU, 7KB, 28-SOIC | Microchip
PIC16C73A-20I/SO

PIC16C73A-20I/SO - 8-Bit 20MHz OTP MCU, 7KB, 28-SOIC | Microchip

The Microchip Technology PIC16C73A-20I/SO is an 8-bit CMOS mid-range microcontroller built around the PIC16CXX architecture, featuring 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 package, it executes instructions at a 20 MHz clock rate with a single-cycle instruction time of 200 ns, delivering up to 5 MIPS of throughput. The 'I' suffix denotes the industrial temperature grade (-40C to +85C), while the '20' speed grade supports up to 20 MHz operation at 4.0V to 5.5V VDD. A microcontroller (MCU) is a single-chip computer containing a processor core, program memory (ROM/Flash/OTP), data memory (RAM), and configurable peripheral blocks such as timers, A/D converters, and communication interfaces. MCUs form the lowest tier of the embedded computing hierarchy - beneath microprocessors and SoCs - and are the workhorse of embedded control. PIC mid-range MCUs specifically target cost-sensitive 8-bit applications where deterministic instruction timing and low power are priorities. Key features of the PIC16C73A include 35 single-word instructions (all single-cycle except program branches which are two cycles), an integrated 8-channel 8-bit A/D converter, two 8-bit timers plus one 16-bit timer, a Capture/Compare/PWM (CCP) module, a synchronous serial port (SSP) supporting SPI and I2C, and a USART for asynchronous serial communication. The high sink/source current of 25/25 mA per I/O allows direct drive of LEDs and small relays, reducing external component count. The 5V, 4 MHz typical supply current of 15 uA and 3V, 32 kHz standby current of 1 uA support battery-backed designs. The device is fabricated in CMOS technology for fully-static operation, meaning the clock can be stopped and the internal state preserved - a feature useful for low-power sleep modes. The architecture uses a 14-bit wide instruction word with separate program and data buses (Harvard architecture), enabling simultaneous instruction fetch and data access. This separation is the key architectural advantage of the PIC family and is why PIC mid-range devices outperform many 8-bit competitors on raw MIPS-per-MHz. Typical applications include industrial control panels, sensor signal conditioning front-ends, appliance controllers, automotive body electronics (non-safety), HVAC thermostats, and consumer product logic replacement. The integrated A/D converter and USART make it particularly well-suited for bridge-sensor data acquisition nodes that must communicate back to a host controller. The PIC16C73A-20I/SO is OTP-based and intended for production-volume designs rather than prototyping - for field programming consider the PIC16F73 Flash-based successor. A key design consideration: OTP means the program memory is programmed once and cannot be erased. Engineers should validate firmware on a Flash equivalent (such as the PIC16F73) before committing to the OTP PIC16C73A for production. Ensure the brown-out reset voltage threshold is correctly configured for the 4.0-5.5V supply range. This page synthesizes distributor pricing, drop-in pin-compatible alternatives, and practical design notes not found in a single manufacturer datasheet, giving procurement and design engineers a single decision-ready reference.

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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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