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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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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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