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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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PIC16C73BT-20/SO - 8-bit OTP MCU 7KB 20MHz 28-SOIC | Microchip
PIC16C73BT-20/SO

PIC16C73BT-20/SO - 8-bit OTP MCU 7KB 20MHz 28-SOIC | Microchip

The Microchip Technology PIC16C73BT-20/SO is an 8-bit CMOS OTP (One-Time Programmable) RISC microcontroller from the PIC16CXX mid-range family, offered in a 28-pin SOIC (7.50 mm) package. It integrates 7KB (4K x 14) of program memory, 192 bytes of RAM, and 22 digital I/O pins, and executes instructions at 20 MHz (200 ns instruction cycle) from a 5 V supply. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, memory, and peripherals around an 8-bit data bus; it sits within the hierarchy MCU -> microcontroller -> embedded processor -> semiconductor. The PIC16CXX mid-range family adds a 14-bit instruction word, hardware USART, A/D converter, and PWM modules to that base, targeting cost-sensitive embedded control. Within Microchip's portfolio, the PIC16C73B is the mid-tier device between the smaller PIC16C72 and the larger PIC16C74, sharing the same 28-pin pinout family for layout reuse. Key features include 20 MHz maximum operating frequency, 5 V typical supply (operating range per datasheet), 22 I/O pins, integrated A/D and PWM peripherals, and OTP program memory. The 'B' silicon revision adds enhanced peripherals versus the original PIC16C73, while the 'T' suffix denotes tape-and-reel packaging. According to the Microchip PIC16C73B datasheet family, the device supports 35 single-word instructions, making code generation compact. The PIC16C73B uses a Harvard RISC architecture with separate program and data buses, and the OTP memory allows factory programming for low-volume production. It includes hardware USART, SPI/I2C, capture/compare/PWM modules, and a multi-channel 8-bit A/D converter, integrating most of what an embedded control node needs without external glue logic. Typical applications include industrial control nodes, automotive body electronics, appliance control boards, sensor signal conditioning, and low-cost motor control. Engineers select this family when the application needs more peripherals than a PIC16C72 but does not justify stepping up to the larger PIC16C74/PIC16F877A. When designing with this device, plan OTP programming into the production flow because OTP cannot be reprogrammed in-circuit. For new designs with similar I/O needs but lower cost, evaluate the flash-based PIC16F73 as a modern equivalent; for AEC-Q100 automotive programs, confirm the latest Microchip cross-reference tool recommendations. This page synthesizes distributor pricing, OTP programming notes, and drop-in alternatives not found on a single manufacturer page, helping engineers quickly qualify or replace the PIC16C73BT-20/SO.

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PIC16C73BT-20/SS - 8-Bit 20MHz OTP MCU 7KB Flash 28-SSOP | Microchip
PIC16C73BT-20/SS

PIC16C73BT-20/SS - 8-Bit 20MHz OTP MCU 7KB Flash 28-SSOP | Microchip

The Microchip Technology PIC16C73BT-20/SS is an 8-bit PIC mid-range CMOS microcontroller running at 20MHz with 7KB (4K x 14) of One-Time Programmable (OTP) program memory and 192 bytes of RAM, housed in a 28-pin SSOP (5.30mm body) surface-mount package. The device features 22 I/O pins, integrated peripherals including a 10-bit multi-channel Analog-to-Digital Converter (ADC), two 8-bit timers plus one 16-bit timer, a synchronous/asynchronous serial port (USART/SCI), an SSP module supporting SPI and I2C, a Capture/Compare/PWM (CCP) module, and a Brown-out Reset (BOR) circuit. An OTP microcontroller is a one-time programmable device whose program memory uses fuse-link or EPROM-style cells that can be written once during production and cannot be electrically erased; this contrasts with Flash-based PIC16F parts that support in-circuit reprogramming. OTP MCUs deliver lower per-unit cost and higher security in volume production and belong to the broader hierarchy: PIC16C family -> PIC16 mid-range core -> 8-bit MCU -> microcontroller -> embedded processor -> semiconductor. The PIC16C73B operates across 2.5V to 5.5V supply, supports a 35-instruction RISC set, and offers up to 5 MIPS sustained performance, which provides a deterministic execution model suited to real-time control loops. The 28-SSOP footprint exposes dedicated crystal/oscillator pins, an MCLR reset, plus PORTB interrupt-on-change wake-up, giving designers flexible low-power and wake-up behavior. Typical applications include industrial control panels, automotive body and HVAC subsystems, consumer appliance control boards, sensor conditioning front-ends, and embedded control modules where a small pin count, modest memory, and deterministic timing are required. When designing with this OTP part, plan the firmware image before ROM submission since field updates are impossible; consider a flash-based PIC16F equivalent for development/production flexibility, and validate SSOP PCB pad geometry against JEDEC MO-150 for reflow yield.

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PIC16C73BT-20E/SO - 8-Bit OTP MCU, 20MHz, 28-SOIC | Microchip
PIC16C73BT-20E/SO

PIC16C73BT-20E/SO - 8-Bit OTP MCU, 20MHz, 28-SOIC | Microchip

The Microchip Technology PIC16C73BT-20E/SO is an 8-bit CMOS OTP (One-Time Programmable) microcontroller from the PIC16CXX mid-range family, operating at 20 MHz and housed in a 28-pin SOIC package. The device integrates 7KB of program memory (4K x 14 words), 192 bytes of RAM, and 22 digital I/O pins, while supporting a supply voltage range of 4V to 5.5V. According to the Microchip datasheet (DS30390E-family reference), the device executes 35 single-word instructions in a single instruction cycle, with the only two-cycle exceptions being program branches, giving an effective throughput close to 5 MIPS at 20 MHz. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory (ROM/EPROM/OTP/Flash), data RAM, and programmable I/O peripherals. The PIC16CXX mid-range family targets low-cost, high-performance embedded applications where deterministic instruction timing and ease of development matter more than raw compute. Within the broader taxonomy, this device is part of the 8-bit MCU -> microcontroller -> embedded processor -> semiconductor category. OTP memory allows one-time programming via an external programmer, which is common in cost-sensitive volume production where firmware is final and code updates are not expected in the field. Key features include three timer modules (Timer0, Timer1, Timer2), a 5-channel 8-bit ADC, a USART for serial communication, and an SSP module supporting SPI and I2C. The architecture also includes a power-on reset, brown-out detection, watchdog timer with its own on-chip RC oscillator, and code protection bits. These integrated peripherals reduce external component count and BOM cost. The PIC16C73B uses a Harvard RISC architecture with separate program and data buses, enabling simultaneous instruction fetch and operand access. The 14-bit instruction word yields compact code density. Power-saving SLEEP mode, programmable oscillator options (RC, XT, LP, HS), and dual clock sources make it flexible for both line-powered and battery-aware designs. The wide operating temperature range of -40C to +125C supports industrial environments. Typical applications include appliance control, HVAC fan/valve drivers, industrial sensor interfaces, low-end motor control, and consumer electronics human-machine interfaces. Designers also choose the PIC16C73BT-20E/SO for educational and legacy embedded systems, where the mature toolchain (MPLAB, ICD programmers) and abundant code examples remain valuable. When designing with this device, ensure the MCLR reset circuit uses the recommended 10 kohm pull-up to VDD, and place a 0.1 uF decoupling capacitor within 1 cm of the VDD pin. For ADC accuracy, dedicate separate analog and digital ground traces joined at a single point to minimize digital switching noise coupling into analog channels. This page synthesizes distributor pricing, same-brand drop-in alternatives, and practical design notes not consolidated in the manufacturer datasheet.

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PIC16C73BT-20E/SS - 8-Bit 20MHz OTP MCU, 7KB Flash | Microchip
PIC16C73BT-20E/SS

PIC16C73BT-20E/SS - 8-Bit 20MHz OTP MCU, 7KB Flash | Microchip

The Microchip Technology PIC16C73BT-20E/SS is an 8-bit PIC microcontroller from the PIC16CXX mid-range family operating at 20MHz with 7KB (4K x 14) of One-Time Programmable (OTP) program memory and 192 bytes of RAM, housed in a 28-pin SSOP (5.30mm body width) surface-mount package. A PIC (Peripheral Interface Controller) microcontroller is a class of 8-bit RISC microcontrollers built on a Harvard architecture, originally developed by General Instrument's Microelectronics Division and now owned by Microchip Technology. PIC MCUs combine a compact instruction set, integrated peripherals, and low power consumption, making them widely deployed in industrial control, consumer electronics, automotive subsystems, and embedded sensing applications. The PIC16CXX mid-range family occupies the middle of Microchip's 8-bit lineup, offering a balance of program memory (ROM/EPROM/OTP/Flash), RAM, and I/O count targeted at cost-sensitive yet feature-rich designs. Key features of the PIC16C73BT-20E/SS include 22 digital I/O lines, three serial communication peripherals (I2C, SPI, and UART/USART), an enhanced mid-range 14-bit instruction word, and industrial-grade temperature range (-40C to +125C) as indicated by the "/E" extended-temperature suffix. The device is well suited to legacy industrial controllers, sensor front-ends, and appliance control where an OTP-coded, one-time-programmable part is preferred for low-cost production. Architecturally, the PIC16C73BT-20E/SS implements a fully-static CMOS design with a 14-bit wide instruction path, an 8-bit data path, and a separate program/data bus structure. The OTP program memory allows one-time field programming of firmware, which lowers per-unit cost for high-volume runs where code revision is not required. The integrated ADC, capture/compare/PWM, and USART peripherals are addressed through a small bank of SFRs and are programmable via the standard PIC mid-range instruction set. Typical applications include industrial automation modules, sensor signal conditioning boards, motor control front-ends, white-goods appliance controllers, and embedded data acquisition systems. Designers select this part when they need proven mid-range PIC peripherals with a 20MHz clock in an SSOP-28 footprint. When designing with the PIC16C73BT-20E/SS, confirm crystal or resonator loading and choose appropriate decoupling on VDD/AVDD pairs. For new designs, consider the PIC16F73 flash-based counterpart for in-circuit reprogrammability during prototyping. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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PIC16C73BT-20I/SO - 8-Bit 20MHz 7KB OTP MCU 28-SOIC | Microchip
PIC16C73BT-20I/SO

PIC16C73BT-20I/SO - 8-Bit 20MHz 7KB OTP MCU 28-SOIC | Microchip

The Microchip Technology PIC16C73BT-20I/SO is an 8-bit CMOS RISC microcontroller from the PIC16CXX mid-range family, delivering 20 MHz operation with 7 KB (4K x 14) of One-Time-Programmable (OTP) program memory in a 28-pin SOIC wide-body package. The "T" suffix indicates Tape and Reel packaging, while "I" denotes the industrial operating temperature range of -40C to +85C. Per the Microchip PIC16C73B datasheet, this member of the PIC16C63A/65B/73B/74B family is built on a fully-static CMOS process and provides 35 single-word instructions, all single-cycle except program branches which take two cycles. A microcontroller (MCU) is a single-chip computer that integrates a CPU, non-volatile program memory, working RAM, and peripheral interfaces onto one die. The PIC16C73B belongs to the mid-range PIC16 family, which sits below the PIC18 enhanced family and above the PIC12/PIC14 baseline families. The OTP variant contrasts with UV-erasable CERDIP parts and Flash-based PIC16F successors, making this part suited to volume production where code is fixed at the time of manufacture rather than re-programmed in the field. Key features include a 20 MHz maximum clock rate, 192 bytes of RAM, 22 digital I/O pins, an integrated 8-channel 8-bit Analog-to-Digital Converter (ADC), a USART, an SPI/I2C compatible synchronous serial port, two Capture/Compare/PWM modules, a watchdog timer, and a 5 V supply range of 4.0 V to 5.5 V. Brown-out Reset and Power-on Reset provide robust startup behavior in noisy industrial environments. The wide-body 28-SOIC footprint simplifies hand-soldering and inspection during prototyping while remaining compatible with automated SMT lines. Architecturally, the device uses a Harvard-style memory bus with separate program and data paths, which is what allows most instructions to complete in one oscillator cycle. Peripheral integration eliminates the external ADC and UART chips a discrete 8051 design would require, shrinking both BOM count and PCB area in cost-sensitive embedded products. Typical applications include industrial control panels, appliance motor controllers, simple sensor signal conditioning, automotive body electronics (non-safety), HVAC thermostats, and consumer remote-control hosts. Industrial grade (-40C to +85C) and OTP memory make the part appropriate when firmware is finalized before tooling and the end environment is electrically harsh but thermally moderate. Design consideration: place a 0.1 uF decoupling capacitor close to VDD and a bulk 10 uF tantalum or aluminum electrolytic capacitor near the supply pin. The MCLR reset pin requires a 10 kohm pull-up to VDD; in noisy environments add a 100 nF cap from MCLR to ground for glitch immunity. Program memory is one-time-programmable - choose the Flash PIC16F73 for prototypes or field-updatable deployments. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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PIC16C745-I/SO - 8-Bit 24MHz USB MCU, 14KB OTP, 28-SOIC | Microchip
PIC16C745-I/SO

PIC16C745-I/SO - 8-Bit 24MHz USB MCU, 14KB OTP, 28-SOIC | Microchip

The Microchip Technology PIC16C745-I/SO is an 8-bit CMOS OTP (One-Time-Programmable) microcontroller from the PIC16C family that integrates a certified USB 1.1 Low-Speed peripheral, 14KB (8K x 14) of program memory, 256 bytes of RAM, 22 digital I/O lines, and a 24 MHz instruction-clock core delivering 167 ns instruction execution. An 8-bit microcontroller (MCU) is a single-chip microprocessor optimized for embedded control, integrating CPU, memory, and peripherals. Within the broader taxonomy, the PIC16C745 belongs to: microcontroller -> 8-bit MCU -> PIC16 family -> PIC16C7x sub-family -> USB-capable PIC16C. Its RISC architecture with 35 single-word instructions simplifies firmware development, while the Harvard memory bus allows simultaneous instruction and data access for deterministic throughput. Key differentiating features include USB 1.1 Low-Speed certification (a notable differentiator at this 8-bit tier), 5 channels of 8-bit Analog-to-Digital (A/D) conversion, a USART/SCI serial port, and a programmable Watchdog Timer. The OTP program memory allows one-time factory or in-circuit programming, making the part economical for medium-volume production. Operating voltage spans 4.0V to 5.5V from a single 5V rail typical of USB bus-powered designs. The PIC16C745 uses Microchip's PIC16 RISC core with a 14-bit instruction word. Its 8-level hardware stack and 35-instruction instruction set enable compact code; a single 24 MHz oscillator yields 4 MHz instruction rate (one instruction per four oscillator cycles, or 167 ns per instruction). Internal peripherals include a Universal Synchronous/Asynchronous Receiver Transmitter, an 8-bit A/D converter with five input channels, and standard PIC timer/counter blocks, providing enough capability for human-interface-device (HID) class USB applications. Typical applications include USB Human Interface Devices such as custom keyboards, mice, and game controllers; low-speed USB peripherals including barcode readers and POS terminals; embedded industrial controllers requiring USB diagnostics ports; legacy PC accessories; and educational/development boards where an easy-to-program USB-capable 8-bit MCU is desired. Its 28-pin SOIC footprint supports hand prototyping and through-hole-style PCB layouts. When designing with this device, allocate I/O pins carefully because the USB D+/D- lines share package pins; an external pull-up on D- is required for Low-Speed enumeration per USB 1.1 specification. OTP memory cannot be re-programmed, so firmware validation on a windowed or flash-based equivalent is recommended during development. This page synthesizes distributor pricing, certified USB 1.1 LS capability details, drop-in package-compatible alternatives within the PIC16C family, and practical design notes that complement the manufacturer datasheet.

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PIC16C745-I/SP - 8-bit 24MHz 14KB OTP USB MCU | Microchip
PIC16C745-I/SP

PIC16C745-I/SP - 8-bit 24MHz 14KB OTP USB MCU | Microchip

The Microchip Technology PIC16C745-I/SP is an 8-bit CMOS OTP-based microcontroller in the PIC16 family, integrating a certified USB 1.1 Low-Speed peripheral with 14 KB of program memory and 256 bytes of RAM in a 28-pin SPDIP (Skinny Plastic DIP) through-hole package. It executes instructions in 167 ns at 24 MHz from a single 5 V supply and provides 22 digital I/O pins plus 5 channels of 8-bit ADC for mixed-signal interfacing. According to the Microchip product page, the part is USB 1.1 Low-Speed certified and pairs an enhanced PIC RISC core (35 single-word instructions) with an on-chip full-speed USB transceiver. A microcontroller (MCU) is a single-chip computer containing a CPU core, non-volatile program memory, working RAM, and peripheral blocks such as timers, ADC, communication controllers, and I/O. The PIC16C745 occupies the "small USB-enabled 8-bit MCU" tier in the broader taxonomy: PIC16C745 -> PIC16 family -> PIC microcontroller -> 8-bit MCU -> microcontroller -> embedded processor -> semiconductor. Its OTP (one-time programmable) program memory distinguishes it from flash-based siblings (PIC16F745) and from UV-erase windowed (PIC16C745-JW) variants, making it suitable for low-cost, high-volume production where firmware is finalized. Key differentiating features include 22 I/O pins (higher than many 28-pin USB parts), 5 channels of 8-bit ADC, integrated USB 1.1 Low-Speed transceiver, and USART/SCI communication. The wide operating voltage (4.0 V to 5.5 V) and industrial temperature range (-40C to +85C) make it suitable for commercial and industrial embedded designs. The 28-pin SPDIP package supports easy prototyping on breadboards and through-hole production. Architecturally, the PIC16C745 uses Microchip's enhanced Harvard architecture with separate program and data buses, a hardware multiplier-free RISC core, and direct peripheral access via SFRs. The integrated USB SIE handles Low-Speed signaling and packet framing, removing the need for an external USB transceiver or firmware bit-banging, which significantly simplifies HID-class and CDC-class device designs. Typical applications include USB human-interface devices (keyboards, mice, game controllers), low-speed USB-to-serial bridges, industrial sensor front-ends with USB diagnostics, USB-based data-acquisition pods, and legacy equipment retrofits. The 5-channel ADC and 22 I/O lines also suit small instrumentation front-ends with a USB service port. When designing with this device, note that the OTP memory cannot be reprogrammed in-circuit; prototypes should use the PIC16F745 (flash) or PIC16C745-JW (windowed) variant during development. A 24 MHz crystal or resonator is required for full-speed core operation, and the internal USB transceiver needs the proper D+/D- pull-up resistor (1.5 kohm to VCC) for Low-Speed enumeration. This page synthesizes distributor pricing, drop-in package-compatible alternatives, application-specific design notes, and lifecycle intelligence not aggregated by any single distributor.

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PIC16C745/JW - 8-Bit 24MHz USB MCU, 14KB EPROM, 28-CerDip | Microchip
PIC16C745/JW

PIC16C745/JW - 8-Bit 24MHz USB MCU, 14KB EPROM, 28-CerDip | Microchip

The Microchip Technology PIC16C745/JW is an 8-bit CMOS OTP-based microcontroller in the PIC16CXX mid-range family, delivering 167 ns instruction execution across 35 single-word instructions in a 28-pin Ceramic DIP windowed (CerDip) package. It integrates 14 KB (8K x 14) of UV-erasable EPROM program memory, 256 bytes of data RAM, and 22 I/O lines, while supporting USB 1.1 Low-Speed communication certified by Microchip, five 8-bit ADC channels, and a USART (SCI) serial port. An 8-bit microcontroller is a single-chip computer that processes data 8 bits at a time using a RISC or CISC instruction set, and it sits in the broader hierarchy of microcontrollers -> embedded controllers -> semiconductor ICs. The PIC16C745 belongs to Microchip's PIC16 mid-range family, which is positioned between the baseline PIC10/PIC16 and the high-performance PIC18 lines. This positions the part as a low-cost, OTP-programmable solution for USB-enabled embedded designs where field re-programmability is not required. Key differentiating features include native USB 1.1 Low-Speed device support, 24 MHz maximum clock (4 MHz instruction rate from a 4:1 internal divider), 22 digital I/O pins, 5 channels of 8-bit ADC, and an integrated USART. The windowed CerDip package allows UV erasure of the EPROM, which makes the JW suffix particularly suited for prototyping and pre-production engineering rather than high-volume manufacturing. The PIC16C745 uses a Harvard RISC architecture with separate program and data buses, plus a 14-bit instruction word. This architecture yields deterministic interrupt latency and single-cycle execution for most instructions, which simplifies real-time control firmware. The on-chip peripherals are mapped into the same linear data memory space, with special-function registers (SFRs) controlling the USB SIE, ADC, USART, and timers. Typical applications include USB Human Interface Devices (HID) such as keyboards, mice, and game controllers, low-speed USB peripherals, industrial control front-ends, and educational/professional development platforms where the windowed package supports iterative firmware iteration. The 5-channel 8-bit ADC supports simple analog sensor acquisition. Designers should note that the JW (CerDip windowed) variant is intended for development; production runs should migrate to the OT or SO/SS plastic packages. USB bus-powered designs must observe the 100 mA / 500 mA USB 1.1 power-budget rules and provide proper D+/D- series resistors and ESD protection.

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PIC16C745T-I/SO - 8-bit USB MCU, 14KB OTP, 28 SOIC | Microchip
PIC16C745T-I/SO

PIC16C745T-I/SO - 8-bit USB MCU, 14KB OTP, 28 SOIC | Microchip

The Microchip Technology PIC16C745T-I/SO is a CMOS, fully-static, OTP-based 8-bit microcontroller belonging to the PIC16CXX mid-range family, integrating a USB 1.1 (low-speed) Serial Interface Engine on-chip and packaged in a 28-pin SOIC (SO) wide-body outline for industrial temperature operation. It executes one instruction per 167 ns (≈6 MIPS) from a 24 MHz external oscillator and offers 14 KB of OTP program memory, 256 bytes of data RAM, and 22 digital I/O lines, with five 8-bit ADC channels for mixed-signal sensing. A microcontroller (MCU) is a single-chip computer that combines a CPU core, program memory, working RAM, and configurable peripherals. In the product taxonomy it sits as 8-bit MCU → microcontroller → embedded processor → semiconductor. The PIC16C745 belongs specifically to Microchip's OTP (One-Time Programmable) PIC16 mid-range line, sharing its 35-instruction RISC core with hundreds of PIC16 siblings, while the integrated USB SIE distinguishes it from non-USB variants in the family. This positioning makes it ideal for cost-sensitive, low-volume, or pre-production designs where flash reprogrammability is unnecessary. Key features include hardware USB 1.1 full-/low-speed operation, five channels of 8-bit A/D conversion, a USART, an SSP/SPI/I2C-compatible synchronous serial port, two 8-bit timers plus one 16-bit timer with capture/compare/PWM, a watchdog timer, and brown-out reset. The mid-range RISC core delivers deterministic instruction timing, an 8-level hardware stack, and four oscillator modes for low-power flexibility. The architecture pairs a Harvard bus (separate program/data paths) with a microchip-developed PIC RISC engine; on-chip peripherals are memory-mapped, simplifying firmware. The industrial -40 °C to +85 °C operating range and SOIC-28 plastic package suit factory-floor, instrumentation, and legacy USB-HID designs. Compared with flash-based PIC16F variants, the OTP die costs less per unit and is preferred when code is finalized in production. Typical applications include USB Human Interface Devices (HID) such as keyboards and mice, low-speed USB peripherals, industrial data loggers, and legacy embedded controllers requiring on-chip USB. The integrated ADC plus PWM makes the device suitable for closed-loop motor control and analog sensing. When designing with the PIC16C745T-I/SO, allocate the USB D+/D– lines to the dedicated RC4/RC5 pins and provide a 27 Ω series resistor on each; respect the 5 V VDD requirement of the USB transceiver, and route the crystal traces symmetrically with a guard ground to meet USB electrical compliance. This page synthesizes distributor pricing, parametric alternatives, and applied design notes not consolidated in the Microchip datasheet.

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PIC16C74A-04/L - 8-Bit 4MHz OTP MCU 7KB 33 I/O PLCC-44 | Microchip
PIC16C74A-04/L

PIC16C74A-04/L - 8-Bit 4MHz OTP MCU 7KB 33 I/O PLCC-44 | Microchip

The Microchip Technology PIC16C74A-04/L is an 8-bit CMOS microcontroller from the PIC16C7X mid-range family, running at 4 MHz with 7KB (4K x 14) of One-Time Programmable (OTP) program memory and 192 bytes of RAM, housed in a 44-pin PLCC (16.59 x 16.59 mm) package. It features an 8-channel 8-bit Analog-to-Digital (A/D) converter, 33 digital I/O lines, and is specified for operation from 4.0 V to 5.5 V across commercial, industrial, and extended temperature ranges. A microcontroller (MCU) is a single-chip computer integrating a CPU, memory (RAM/ROM/Flash), and peripherals on one die; an 8-bit MCU processes data in 8-bit chunks and is the workhorse of embedded control where cost, determinism, and low power outweigh raw computational throughput. The PIC16C7X family uses a RISC architecture with 35 single-word instructions, where all instructions execute in one cycle except program branches (two cycles). The PIC16C74A-04/L variant is the 4 MHz speed grade (the -04 suffix) in a windowed/leadless PLCC package (the /L suffix), making it suitable for development and lab work as well as production designs. Key differentiating features include high sink/source current of 25 mA/25 mA per I/O (sufficient to drive LEDs and small relays directly), integrated 8-channel 8-bit ADC for analog sensor input, low-power operation down to 1 µA typical standby at 3 V/32 kHz, and an integrated Watchdog Timer with its own on-chip RC oscillator for reliable reset behavior. The wide operating voltage range (2.5 V to 6.0 V), high-performance RISC CPU, and OTP program memory make the part well-suited to volume production where firmware is finalized and code protection is required. Architecture-wise, the PIC16C74A uses a Harvard bus structure with separate program and data paths, a 14-bit instruction word, and a 8-bit data path. The 4 MHz clock speed grade provides 1 µs instruction cycle time, enabling precise timing loops without resorting to software overhead. The 192-byte RAM is shared between general-purpose registers and Special Function Registers (SFRs), with banked memory access for the larger register file. Typical applications include industrial control systems, sensor signal conditioning with on-chip ADC, motor control via PWM outputs, appliance control (white goods), automotive body electronics (non-safety), and embedded data acquisition systems. The OTP program memory is appropriate for high-volume production with stable firmware; for field-updatable designs, the flash-based PIC16F74 is recommended as a direct functional successor. When designing with this part, note that OTP memory cannot be erased - prototypes should use the JW (windowed CERDIP) variant for UV erasure. A 3.0 V to 6.0 V supply range allows operation directly from a 5 V regulated rail or four-cell battery stack. Ensure MCLR reset circuit includes the proper pull-up and any in-circuit Serial Programming (ICSP) isolation is correctly handled. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the standalone manufacturer datasheet, enabling faster sourcing decisions for engineers maintaining or replacing PIC16C74A-04/L designs.

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PIC16C74A-04/P - 8-Bit 4MHz OTP MCU 7KB | Microchip
PIC16C74A-04/P

PIC16C74A-04/P - 8-Bit 4MHz OTP MCU 7KB | Microchip

The Microchip Technology PIC16C74A-04/P is an 8-bit CMOS one-time-programmable (OTP) microcontroller from the PIC16C7X mid-range family, delivering 4 MHz CPU performance with 7 KB (4K x 14) of program memory in a 40-pin PDIP through-hole package. What is an 8-bit OTP microcontroller? A microcontroller (MCU) is a single-chip computer containing a CPU, memory, and peripherals; the 8-bit designation means its data path and registers are 8 bits wide. OTP (One-Time-Programmable) memory can be written once and is ideal for low-to-mid volume production where flash reprogrammability is not required. Within the broader taxonomy, the PIC16C74A sits in the hierarchy: microcontroller -> embedded controller -> 8-bit MCU -> PIC mid-range -> PIC16C7X family. Mid-range PIC MCUs target low-cost, high-performance control applications with a RISC instruction set, integrated peripherals, and broad tool support. Key differentiating features include 192 bytes of RAM, 33 digital I/O pins, an integrated 8-channel 8-bit A/D converter, two CCP modules, a USART, an MSSP (SPI/I2C), and three timers. The 'A' revision improved A/D accuracy and added the 8-bit A/D converter variant versus earlier PIC16C74 silicon, and the '-04' speed suffix denotes 4 MHz operation (vs. '-10' and '-20' variants at higher speeds). The device draws only 15 uA typical at 5 V/4 MHz and 1 uA standby at 3 V/32 kHz. Technically, the PIC16C74A uses a Harvard architecture with separate program and data buses, a 14-bit instruction word, and a 35-instruction RISC set, all single-cycle except program branches (two cycles). The 40-pin PDIP package has 33 I/O, 5 capture analog inputs, and 2 power/ground pins. Operating voltage is 4.0 to 6.0 V, with industrial and commercial temperature grades available. Typical applications include industrial control panels, motor control signal conditioning, sensor interfacing, simple HVAC controllers, automotive body electronics (pre-CAN nodes), and white-goods user interfaces where OTP cost advantages dominate over flash reprogramming. When designing with the PIC16C74A-04/P, account for OTP programming - firmware must be 100% verified before programming since no field updates are possible. For development, use the PIC16C74A-04/JW (windowed CERDIP) or migrate to the PIC16F74 flash equivalent if in-system reprogrammability is required. This page synthesizes distributor pricing, drop-in same-package alternatives, lifecycle context, and design considerations not aggregated on any single manufacturer or distributor page.

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PIC16C74A-04/PQ - 8-Bit CMOS MCU 7KB OTP 44-MQFP | Microchip
PIC16C74A-04/PQ

PIC16C74A-04/PQ - 8-Bit CMOS MCU 7KB OTP 44-MQFP | Microchip

The Microchip Technology PIC16C74A-04/PQ is an 8-bit CMOS RISC microcontroller from the PIC16CXX mid-range family, integrating 7KB (4K x 14) One-Time-Programmable (OTP) program memory, 192 bytes of RAM, and a multi-channel 8-bit Analog-to-Digital Converter. Housed in a 44-pin MQFP (10x10 mm) surface-mount package, this device operates at up to 4 MHz from a wide 2.5V to 6.0V supply range and is offered in the commercial 0C to +70C temperature grade. The "04" speed suffix denotes the 4 MHz maximum oscillator frequency. An 8-bit microcontroller (MCU) is a small, self-contained computing device built around an 8-bit data path CPU, integrated program memory, data RAM, and peripheral interfaces such as timers, communication ports, and ADCs. Microcontrollers belong to the broader semiconductor integrated-circuit family and sit within the embedded-systems hierarchy: MCU -> microprocessor -> computing SoC. The PIC16CXX mid-range family introduced by Microchip popularized the Harvard RISC architecture, separate program and data buses, and OTP/EPROM program memory, which became foundational for low-cost industrial and consumer embedded designs. Key features include 33 digital I/O pins, high sink/source current of 25/25 mA per pin suitable for direct LED or relay drive, low-power operation drawing approximately 15 uA typical at 5V/4 MHz and 1 uA typical standby at 3V/32 kHz, two 8-bit and one 16-bit timer/counter modules, a USART for serial communication, and a synchronous serial port (SSP) supporting SPI and I2C master/slave modes. The integrated ADC provides up to 8 input channels with 8-bit resolution, allowing direct interface with analog sensors without external conversion hardware. The PIC16C74A uses a 14-bit instruction word RISC engine executing most instructions in a single 200 ns cycle at 4 MHz, plus a 35-instruction set designed for compact C and assembly code generation. On-chip peripherals include a watchdog timer with its own on-chip RC oscillator, a brown-out reset circuit, and a programmable code-protection scheme, enabling robust single-chip embedded control without external supervisor ICs. Typical applications include industrial process control and sensor interfacing, automotive body and chassis subsystems (non-safety), consumer appliance control, motor control, instrument panels, and embedded data-acquisition front ends. The wide operating voltage range and high-current I/O make it especially suitable for directly driving relays, solenoids, and LED arrays in industrial environments. When designing with this device, note that OTP memory can be programmed only once, so the production firmware must be fully verified before device programming. Designers transitioning to flash-based parts should consider the recommended Microchip successor PIC16F74 or PIC16F877A, which offer reprogrammability, lower power, and wider tool-chain support. The 44-MQFP (PQ) footprint requires adequate PCB area and standard QFP soldering techniques. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes drawn from Microchip datasheet DS30390E that are not consolidated on a single manufacturer page, helping procurement and design engineers make informed selection decisions.

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PIC16C74A-04/PT - 8-bit MCU, 7KB OTP, 4MHz, 44-TQFP | Microchip
PIC16C74A-04/PT

PIC16C74A-04/PT - 8-bit MCU, 7KB OTP, 4MHz, 44-TQFP | Microchip

The Microchip Technology PIC16C74A-04/PT is an 8-bit CMOS microcontroller from the PIC® 16C mid-range family, featuring 7 KB (4K x 14) of one-time-programmable (OTP) program memory, 192 bytes of RAM, and 33 digital I/O pins in a 44-pin TQFP surface-mount package. It operates at a maximum clock speed of 4 MHz and supports a 5V supply typical of the PIC16C7x family, integrating peripherals such as an A/D converter, capture/compare/PWM (CCP) modules, USART, and synchronous serial port (SSP) for SPI/I2C communication. Background knowledge: A microcontroller (MCU) is a single-chip computer that integrates a CPU, RAM, program memory (ROM/Flash/OTP), and peripherals such as timers, A/D converters, and communication interfaces. The PIC® 16C family from Microchip Technology is a mid-range 8-bit architecture introduced in the early 1990s that uses a 14-bit instruction word and a RISC-based Harvard bus structure, occupying the position PIC16C -> PIC® mid-range 8-bit -> 8-bit microcontroller -> microcontroller -> semiconductor device. Key features of the PIC16C74A include 7 KB (4K x 14) OTP program memory, 192 bytes of data RAM, 33 bidirectional I/O pins, two 8-bit and one 16-bit timers, two Capture/Compare/PWM (CCP) modules, an 8-channel 8-bit A/D converter, USART for serial communication, and an SSP supporting SPI and I2C. The OTP memory makes this part well-suited to medium-volume production where in-system programmability is not required. Technically, the PIC16C74A-04/PT uses a Harvard architecture with separate program and data buses, a 14-bit-wide instruction word, and a RISC-style instruction set. Its fully static CMOS design allows operation at clock speeds from DC to 4 MHz across the commercial 0°C to +70°C range. The 44-TQFP package provides approximately 31 C/W theta-JA thermal resistance suitable for industrial automation and embedded control. Typical applications include industrial control panels, motor control, instrumentation, sensor interfacing, and consumer appliances requiring moderate on-chip integration. According to the PIC16C74A datasheet from Microchip, the integrated A/D converter and CCP/PWM modules also suit power conversion and lighting control. Designers must note that the PIC16C74A uses EPROM/OTP memory, so code cannot be re-flashed; for development and field updates, the Microchip-recommended PIC16F74 (Flash) is the migration path. This page consolidates distributor pricing, same-package alternatives, datasheet links, and design notes specific to the 44-TQFP PIC16C7x family, with comparison data not assembled in the manufacturer datasheet.

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PIC16C74A-04E/L - 8-bit CMOS MCU, 7KB OTP, 4MHz, 44-PLCC | Microchip
PIC16C74A-04E/L

PIC16C74A-04E/L - 8-bit CMOS MCU, 7KB OTP, 4MHz, 44-PLCC | Microchip

The Microchip Technology PIC16C74A-04E/L is an 8-bit CMOS microcontroller from the PIC16CXX mid-range family with 7KB (4K x 14) of One-Time Programmable (OTP) program memory, 192 x 8 bytes of RAM, and 33 digital I/O lines. It operates at a maximum clock speed of 4 MHz, ships in a 44-pin PLCC (J-Lead) package, and integrates a multi-channel 8-bit A/D converter alongside I2C, SPI, and USART peripherals. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, RAM, non-volatile program memory, and peripheral interfaces around an 8-bit data bus. Within the broader hierarchy, MCUs are a sub-category of microprocessors, and the PIC16C family sits in Microchip's mid-range tier between baseline 12-bit-core PIC10/12/16 devices and the high-performance 16-bit PIC24/dsPIC families. PIC16C parts use a 14-bit instruction word, modified Harvard architecture, and OTP/EPROM program memory, which historically distinguished them from later flash-based PIC16F derivatives. Key features of the PIC16C74A-04E/L include an integrated 8-channel 8-bit A/D converter, three timer/counters (Timer0, Timer1, Timer2), a synchronous/asynchronous USART, an SSP module supporting both SPI and I2C, 33 I/O pins with 25 mA source/sink capability, and a wide operating voltage range from 2.0 V to 6.0 V. It supports commercial, industrial, and extended temperature grades, with the "E" suffix indicating the extended temperature range of -40C to +125C typical for automotive-grade MCUs. The device uses a RISC architecture with only 35 single-cycle instructions, watchdog timer, brown-out reset, power-on reset, and programmable code protection. Typical standby current at 3 V/32 kHz is 1 uA and active current at 5 V/4 MHz is around 15 uA typical (excluding peripheral loads), which makes it suitable for low-power embedded control. The "-04" speed suffix specifies a 4 MHz oscillator rating, distinguishing it from -10 and -20 variants within the family. Typical applications include industrial control systems, automotive body and chassis electronics, instrument panels, motor control front-ends, and legacy embedded designs where OTP programmability is acceptable. Designers most often select the PIC16C74A-04E/L for cost-sensitive, low-volume, or extended-temperature programs. The "E" temperature grade and the "L" PLCC package together make this variant particularly common in automotive under-hood and industrial process control designs. When designing with this part, plan for OTP programming during production; the device is windowless, so code cannot be erased and re-written. Engineers designing for new programs should consider the flash-based PIC16F74 as a modern replacement, per Microchip's official product page migration note. Allow 10 nF/100 nF decoupling on VDD/VSS pairs and keep the oscillator traces short to meet the 4 MHz timing budget reliably.

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PIC16C74A-04E/P - 8-bit 4MHz MCU 7KB OTP 33 I/O | Microchip
PIC16C74A-04E/P

PIC16C74A-04E/P - 8-bit 4MHz MCU 7KB OTP 33 I/O | Microchip

The Microchip Technology PIC16C74A-04E/P is an 8-bit CMOS OTP microcontroller from the PIC16C7X mid-range family, delivering 4 MHz operation, 7 KB of program memory (4K x 14), 192 bytes of RAM, and 33 digital I/O pins in a 40-pin PDIP (0.600 inch, 15.24 mm) package. It integrates an 8-channel 8-bit analog-to-digital converter and operates across an extended temperature range of -40C to +125C, with a wide VDD range up to 6.0 V. The 'E' suffix denotes the extended industrial temperature grade, and the '04' indicates the 4 MHz maximum oscillator frequency. A microcontroller (MCU) is a single-chip computer containing a processor core, program memory, working RAM, and peripherals such as ADCs, timers, and serial interfaces. The PIC16C7X family is a mid-range subset of the PIC16 architecture, sitting between the baseline PIC10/12/16 devices and the high-performance PIC18 family. Microcontrollers occupy the semiconductor hierarchy as small-form-factor embedded processors used to execute deterministic firmware in nearly every electronic product. Key features include an external oscillator interface, 25 mA high sink/source current per I/O, 200 ns instruction execution, only 35 single-word instructions for ease of programming, and ultra-low power consumption of 15 uA typical at 5 V/4 MHz and 1 uA typical standby at 3 V/32 kHz. The OTP (one-time programmable) program memory is suited for production volumes and field-deployed devices where re-programmability is not required. The 8-bit Harvard architecture separates program and data buses for predictable interrupt response. Typical applications include industrial control, automotive body electronics, sensor signal conditioning, and consumer appliance control. The wide operating voltage (2.5 V to 6.0 V) and extended temperature range make the device well suited to factory automation and outdoor equipment where supply rails are unregulated and ambient temperatures are harsh. The integrated ADC simplifies designs that must read multiple analog sensors without an external converter. Designers should note that the PIC16C74A is a legacy OTP device and Microchip recommends the flash-based PIC16F74 as a newer alternative for new designs. Existing production code targeting PIC16C74A can migrate to PIC16F74 with minimal firmware changes because the instruction set and peripheral register map are compatible. Always verify oscillator configuration bits when porting firmware between OTP and flash variants. This page consolidates distributor pricing, a verified drop-in alternative list, and practical design notes drawn from manufacturer datasheets and reference designs - information not gathered in a single place elsewhere.

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PIC16C74A-04E/PQ - 8-Bit MCU, 7KB OTP, 4MHz, 44-MQFP | Microchip
PIC16C74A-04E/PQ

PIC16C74A-04E/PQ - 8-Bit MCU, 7KB OTP, 4MHz, 44-MQFP | Microchip

The Microchip Technology PIC16C74A-04E/PQ is an 8-bit CMOS RISC microcontroller with 7KB (4K x 14) of one-time programmable (OTP) program memory and 192 bytes of RAM, operating at up to 4MHz from a 2.5V to 6.0V supply, housed in a 44-pin Metric MQFP (10x10 mm) surface-mount package. Part of the PIC16C7X mid-range family, it integrates an 8-channel 8-bit A/D converter, two 8-bit timers plus one 16-bit timer, a Watchdog Timer, and serial peripherals (I2C, SPI, USART) for embedded control designs. The extended-temperature "E" suffix and "-04" speed grade denote an industrial/automotive-style operating envelope at 4MHz maximum oscillator frequency. An 8-bit microcontroller (MCU) is a single-chip computer integrating a CPU, program memory (ROM/EPROM/Flash/OTP), data RAM, I/O ports, timers, and often analog and serial peripherals on one die. The PIC16C7X mid-range architecture uses a 14-bit instruction word and an 8-bit data path, offering higher code density than 8/12-bit competitors at moderate complexity. The MQFP (Metric Quad Flat Pack) family is a surface-mount plastic-leaded package standardized for mid-pin-count MCUs and is itself part of the broader QFP -> SMD plastic-IC package family. Key features include 33 digital I/O lines, 25 mA sink/source current per pin, wide operating voltage (2.5V to 6.0V), and typical active current of 15 uA at 5V/4MHz with standby current down to 1 uA at 3V/32 kHz, supporting battery-friendly embedded designs. Brown-out Reset, Power-on Reset, and a programmable code-protection mechanism simplify field deployment of firmware. The device employs a Harvard RISC architecture with a two-stage pipeline, 35 single-word instructions, and interrupt-driven I/O, allowing deterministic real-time response for control loops and human-interface firmware. Typical applications include industrial automation controllers, automotive body/comfort modules, HVAC controls, instrumentation front-ends, and embedded sensor hubs that benefit from on-chip A/D conversion and standard serial buses. When migrating designs, note that Microchip recommends the Flash-based PIC16F74 as a newer pin-compatible successor with in-circuit programmability. This page consolidates distributor stock, parametric drop-in alternatives, and design considerations that complement but do not replace the manufacturer datasheet.

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