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PIC16LC73AT-04/SO - 8-Bit 4MHz MCU 7KB OTP 28-SOIC | Microchip
PIC16LC73AT-04/SO

PIC16LC73AT-04/SO - 8-Bit 4MHz MCU 7KB OTP 28-SOIC | Microchip

The Microchip PIC16LC73AT-04/SO is an 8-bit RISC microcontroller from the PIC16CXX mid-range family, operating at 4 MHz with 7 KB (4K x 14) of One-Time-Programmable (OTP) program memory, 192 bytes of RAM, and 22 digital I/O pins, all housed in a 28-pin SOIC (SO) gull-wing surface-mount package rated for the commercial temperature grade. What is a PIC16C-series microcontroller? The PIC16C7X family (PIC16C73/74/76/77) is a class of low-cost, high-performance, CMOS, fully-static 8-bit microcontrollers with integrated analog-to-digital (A/D) converters, belonging to Microchip's PIC16CXX mid-range architecture. In the broader hierarchy, an MCU (microcontroller unit) is a complete computer-on-a-chip integrating CPU, memory, and peripherals; the PIC16C73 specifically targets embedded control applications needing on-chip ADC and capture/compare PWM, bridging simple 8-bit designs (PIC12/PIC16F baseline) and higher-performance 16-bit dsPIC/PIC24 families. The "L" prefix indicates a low-voltage variant supporting operation down to approximately 2.5 V, while the "T" suffix denotes tape-and-reel packaging for high-volume assembly. Key features of the PIC16LC73AT-04/SO include a Harvard RISC architecture with 35 single-cycle instructions, a 14-bit instruction word, integrated 8-channel 8-bit ADC, two 8-bit and one 16-bit timer/counters, capture/compare/PWM (CCP) modules, a USART/SCI synchronous-serial port, and an operating voltage range of 2.5 V to 6.0 V. The device supports in-circuit serial programming (ICSP) for OTP devices and is designed for the commercial temperature grade. Typical applications span industrial control, low-power sensor interfaces, automotive body electronics (non-safety), appliance control, and battery-powered instruments. The wide 2.5 V to 6.0 V supply range enables direct connection to 3.3 V regulated rails as well as legacy 5 V logic systems. When designing with this MCU, verify the OTP programming window and toolchain compatibility with MPLAB-X IDE plus MPAS/XC8 compilers; choose the PIC16C73B or PIC16F73 flash variant if in-field firmware updates are required.

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PIC16LC73AT-04I/SO - 4MHz 8-bit OTP MCU 7KB Flash 28-SOIC
PIC16LC73AT-04I/SO

PIC16LC73AT-04I/SO - 4MHz 8-bit OTP MCU 7KB Flash 28-SOIC

The Microchip Technology PIC16LC73AT-04I/SO is an 8-bit PIC16C-family CMOS microcontroller running at 4 MHz, integrating 7 KB (4K x 14 words) of One-Time Programmable (OTP) program memory, 192 bytes of SRAM, and a 28-pin SOIC wide-body surface-mount package. It belongs to Microchip's mid-range PIC16C7X architecture with on-chip peripherals suited for embedded control loops. According to the manufacturer datasheet, this device targets low-power, cost-sensitive applications requiring analog monitoring. A microcontroller (MCU) is an integrated circuit combining a processor core, program and data memory, and programmable I/O peripherals on a single die. The 8-bit MCU category sits below 32-bit ARM Cortex-M devices in performance but excels at deterministic bit-manipulation tasks, low-cost motor/relay drivers, and battery-powered nodes. The PIC16C7X mid-range family is positioned between the baseline PIC10/12/16 families and the enhanced PIC18 family, offering richer peripherals such as A/D converters and multiple serial ports while retaining the classic 14-bit instruction word. Key features include an integrated 8-channel, 8-bit Analog-to-Digital Converter (ADC), two 8-bit timers plus one 16-bit timer, a synchronous Serial Peripheral Interface (SPI), an Inter-Integrated Circuit (I2C) bus, and a Universal Asynchronous Receiver/Transmitter (UART/USART) for asynchronous serial communication. The CPU operates from a 2.5V to 6.0V supply and supports DC to 4 MHz clock input. The 'T' suffix denotes tape-and-reel packaging and 'I' indicates the industrial temperature grade (-40°C to +85°C). On-chip peripherals reduce external glue, reducing real-world design complexity. Technically, the PIC16LC73AT-04I/SO uses a Harvard architecture with separate program and data buses, allowing simultaneous instruction fetch and operand access. The 14-bit instruction word provides a rich opcode set including literal and control operations. Brown-out Reset, Power-On Reset, and Watchdog Timer with on-chip RC oscillator provide system-level safety. OTP program memory supports one-time programming in production, ideal for mature products not planning firmware. Typical applications include industrial process control, sensor signal conditioning, automotive body electronics, low-speed motor control, and small consumer appliances. The wide temperature range allows deployment in factory floors and outdoor enclosures, while the modest memory suits fixed-function appliances. In practice, designers select this part where the ADC and serial connectivity meet the bill but FLASH reprogrammability is unnecessary. Design consideration: OTP memory cannot be field-upgraded - choose FLASH-based PIC16F-series siblings if firmware revisions are anticipated. Additionally, an external decoupling capacitor of at least 0.1 µF is required near the VDD pin. This page synthesizes Microchip datasheet parameters, real-time distributor pricing, and drop-in alternatives including same-package PIC16LC73A and PIC16C73B variants that distributors list and OTA sites such as DigiKey cross-reference for engineers migrating designs.

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PIC16LC73B-04/SP - 8-Bit 4MHz MCU 7KB OTP 28-SPDIP | Microchip
PIC16LC73B-04/SP

PIC16LC73B-04/SP - 8-Bit 4MHz MCU 7KB OTP 28-SPDIP | Microchip

The Microchip Technology PIC16LC73B-04/SP is an 8-bit PIC16 family CMOS microcontroller (MCU) based on RISC architecture, offering 4 MHz instruction execution from a 7 KB OTP program memory footprint in a 28-pin SPDIP through-hole package. Built around the PIC16C PIC instruction set, it executes single-word instructions in 200 ns and is fully upward compatible with the PIC16C5X and PIC12CXXX device families. The "LC" prefix indicates a low-voltage variant supporting 2.5 V to 6.0 V operation (3.3 V / 5 V dual-rail), while the "04" speed grade designates the 4 MHz oscillator. An 8-bit microcontroller is a single-chip computer that integrates a CPU, RAM, program memory (ROM/EPROM/Flash/OTP), I/O peripherals, and timers onto one die. The PIC16LC73B-04 is part of Microchip's mid-range PIC16 family — a hierarchy of microcontrollers -> embedded processors -> semiconductors -> integrated circuits. Its 8-bit data path and 14-bit instruction word make it well-suited for cost-sensitive legacy designs where deterministic timing and minimal BOM are priorities over raw computational throughput. Key features include 192 bytes of RAM, 22 digital I/O pins, 5 channels of 8-bit A/D converter, two additional timers, two capture inputs, a PWM module, and a synchronous serial port (SSP). The device supports power-saving SLEEP mode, watchdog timer with on-chip RC oscillator for safe operation, and a programmable code protection mechanism. The 28-SPDIP package offers hand-solder-friendly through-hole mechanical compatibility, widely used in industrial controllers, consumer appliances, and educational/prototyping platforms. The architecture combines an 8-level deep hardware stack, 32 kHz to 4 MHz oscillator range with on-chip crystal support, and parallel slave port for external bus interfacing. On-chip peripherals reduce external component count; for low-power designs the LC series draws substantially less current than the standard PIC16C73B at equivalent clock rates. Typical applications include industrial control logic, HVAC thermostat controllers, security alarm panels, sensor signal conditioning, small appliance controllers, and legacy 8051/PIC16C replacement boards requiring long-life continuity. When migrating from older PIC16C5X designs, the PIC16LC73B-04 preserves instruction set, register map, and pinout where packages align.

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PIC16LC73B-04I/SO - 8-bit 4MHz OTP MCU, 7KB, 28-SOIC | Microchip
PIC16LC73B-04I/SO

PIC16LC73B-04I/SO - 8-bit 4MHz OTP MCU, 7KB, 28-SOIC | Microchip

The Microchip PIC16LC73B-04I/SO is an 8-bit CMOS RISC microcontroller from the PIC16CXX mid-range family, offering 4 MHz operation, 7 KB (4K x 14) of OTP program memory, and 192 bytes of RAM in a 28-pin SOIC package. It features 22 I/O pins, 5 channels of 8-bit A/D conversion, 2 capture/compare/PWM modules, and a USART port for serial connectivity. A PIC microcontroller (Programmable Intelligent Computer) is a Harvard-architecture RISC device widely used in embedded control. It executes single-cycle instructions from on-chip flash/ROM and integrates peripherals such as timers, ADC, and serial interfaces. Within the taxonomy, this part sits in the chain: microcontroller -> embedded MCU -> 8-bit MCU -> PIC16 family -> PIC16C7x sub-family. It is the "LC" (low-power CMOS) variant of the PIC16C73B, designed for 3.0V to 6.0V operation with reduced standby current. Key features include 25 mA source/sink I/O drive for direct LED and relay control, a 1 µA typical standby current at 3V/32 kHz, 15 µA active current at 5V/4 MHz, and three timer modules supporting capture, compare, and PWM operation. The 8-bit successive-approximation ADC delivers conversion performance adequate for sensor monitoring, while the synchronous/asynchronous USART enables RS-232/RS-485 networking. Architecturally, the PIC16LC73B-04I/SO uses a 14-bit instruction word with an 8-level hardware stack and separate program/data buses. The "04" speed suffix specifies a 4 MHz oscillator, and the "B" suffix denotes the second-generation silicon revision with improved ADC and lower power. Industrial-grade ("I") temperature rating extends the operating range to -40 °C to +85 °C, making it suitable for non-automotive industrial environments. Typical applications include industrial sensor interfaces, low-power remote controls, motor control with PWM, lighting controllers, small appliance control, and battery-powered instrumentation. The wide 3.0V to 6.0V supply simplifies battery designs using two or three alkaline cells or a single lithium cell. Design considerations: select an oscillator mode (XT, HS, RC, LP) based on crystal frequency and power budget, keep ADC traces short and bypass AVdd separately, and reserve at least one I/O pin for In-Circuit Serial Programming (ICSP) so firmware can be updated in production. This page synthesizes distributor pricing from DigiKey/Mouser/LCSC, drop-in PIC16C73B alternatives, and design notes not consolidated in the manufacturer datasheet. Verified against Microchip's PIC16C73B datasheet and distributor pages.

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PIC16LC73B-04I/SP - 8-bit MCU, 7KB OTP, 4MHz, 28-SPDIP | Microchip
PIC16LC73B-04I/SP

PIC16LC73B-04I/SP - 8-bit MCU, 7KB OTP, 4MHz, 28-SPDIP | Microchip

The Microchip Technology PIC16LC73B-04I/SP is an 8-bit CMOS OTP-based mid-range microcontroller in the PIC16CXX family, offering 7KB of program memory, 192 bytes of RAM, and 22 digital I/O pins in a 28-pin SPDIP (0.300 inch, 7.62mm) through-hole package. It operates at a maximum clock frequency of 4 MHz with a 200 ns instruction execution time and is powered from a 2.5 V to 5.5 V supply (LC variant), making it suitable for low-voltage and battery-aware designs. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory (ROM/OTP/Flash), data RAM, timers, I/O peripherals, and often an ADC and serial interface on one die. The PIC mid-range architecture sits between PIC baseline (12/16C5x) and PIC enhanced (17Cxx/18Cxx) families, balancing code density, interrupt capability, and peripheral richness for cost-sensitive embedded applications. Within the system hierarchy, this part belongs to the 8-bit MCU -> microcontroller -> embedded processor -> semiconductor category, and is commonly used wherever deterministic single-cycle execution and low BOM cost outweigh the need for 16/32-bit performance. Key features of the PIC16LC73B-04I/SP include a 5-channel 8-bit Analog-to-Digital Converter (ADC), two 8-bit timers with 1 additional 16-bit timer/counter, two Capture/Compare/PWM (CCP) modules, a USART with addressable SPI/I2C master mode, a Watchdog Timer with its own on-chip RC oscillator, and an In-Circuit Serial Programming (ICSP) interface. The -04 speed grade specifies a 4 MHz maximum oscillator, while the LC suffix denotes the wide 2.5 V to 5.5 V operating range and CMOS process. Architecturally, the device is fully static, executes 35 single-word instructions, and supports both hardware and software stack with 8-level hardware deep nesting. The LC OTP memory is one-time programmable, which makes the part well suited to high-volume mature products rather than frequent firmware revisions. The 28-SPDIP package provides robust through-hole mounting for industrial, automotive aftermarket, and prototyping environments where mechanical stress and rework tolerance matter. Typical applications include industrial control boards, sensor signal conditioning with on-chip ADC, low-speed UART/CCP-driven motor or valve control, and brown-field upgrades of legacy PIC16C7x designs that require migration from 5 V-only to mixed 3.3 V / 5 V rails. Designers should note that OTP memory precludes firmware updates; designs requiring field upgradability should consider the Flash-based PIC16F73 equivalent. This page synthesizes distributor stock, drop-in replacement candidates, and design notes for the PIC16LC73B-04I/SP - information that complements but does not replace the manufacturer datasheet.

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PIC16LC73B-04I/SS - 8-Bit 4MHz OTP MCU, 7KB | Microchip
PIC16LC73B-04I/SS

PIC16LC73B-04I/SS - 8-Bit 4MHz OTP MCU, 7KB | Microchip

The Microchip Technology PIC16LC73B-04I/SS is an 8-bit CMOS microcontroller from the PIC16CXX mid-range family, delivered in a 28-pin SSOP package with 7 KB of One-Time-Programmable (OTP) program memory organized as 4K x 14 words. It executes instructions in a 200 ns instruction cycle at 4 MHz, offers 192 bytes of RAM, and provides 22 digital I/O pins for general-purpose interfacing. The device is designed for low-voltage, low-power embedded control where deterministic 8-bit processing is sufficient and code storage does not need in-system reprogramming. An OTP-based 8-bit microcontroller is a programmable logic device that stores its instruction set in non-volatile, one-time-writable memory rather than flash. This makes parts like the PIC16LC73B ideal for cost-sensitive, high-volume production runs where the firmware is locked at the factory and rarely changes. Within the broader taxonomy, the PIC16LC73B sits under: microcontroller -> 8-bit MCU -> RISC microcontroller -> CMOS MCU -> embedded controller -> semiconductor. Key features include a 35 single-word instruction set common to Microchip mid-range PIC devices, an 8-bit timer/counter with 8-bit prescaler (Timer0), a 16-bit timer/counter with prescaler that can be incremented during Sleep via external crystal (Timer1), and an 8-bit Timer2. An external oscillator interface and built-in Power-on Reset, Brown-out Detect, and Watchdog Timer give the device a complete set of supervisory peripherals for industrial-grade reliability. Typical applications span appliance control, sensor signal conditioning, low-end user-interface panels, battery-powered instruments, motor control PWM, and remote sensor nodes. With 22 I/O pins and three timers, the part is well suited to driving relays, keypads, character LCDs, and UART-connected peripherals. The 28-SSOP footprint is compatible with Microchip's wider PIC16C mid-range line, enabling straightforward PCB reuse across the PIC16C63A/65B/73B/74B/LC variants. When designing with this part, note that OTP memory cannot be erased, so a development cycle requires windowed or flash-based PIC16F equivalents for iteration before locking the final code in the LC variant. Designers should also confirm that the 4 MHz operating point and the 2.5V-5.5V supply range cover their application's worst-case clock and voltage budget. This page synthesizes distributor pricing, same-brand drop-in alternatives from Microchip's PIC16C/LC family, and practical design notes specific to OTP 8-bit MCU migration scenarios, providing context not found in the manufacturer datasheet alone.

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PIC16LC73BT-04/SO - 8-Bit 4MHz MCU, 7KB OTP, 28-SOIC | Microchip
PIC16LC73BT-04/SO

PIC16LC73BT-04/SO - 8-Bit 4MHz MCU, 7KB OTP, 28-SOIC | Microchip

The Microchip Technology PIC16LC73BT-04/SO is an 8-bit CMOS RISC microcontroller from the PIC16CXX mid-range family, offering 7KB (4K x 14) of One-Time-Programmable (OTP) program memory, 192 bytes of RAM, and 22 digital I/O lines in a 28-pin SOIC (7.50 mm body width, gull-wing lead form) surface-mount package. It executes instructions at a 4 MHz oscillator rate, and the 'LC' designation confirms the low-voltage, low-power process variant with a VDD range of 2.5 V to 5.5 V. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory, working RAM, and a range of peripherals onto one silicon die. The PIC16CXX mid-range family is one of Microchip's classic 14-bit instruction width architectures, positioned historically between the baseline PIC10/PIC12/PIC16 families and the high-end PIC18. Within the broader taxonomy, microcontrollers belong to the Embedded > Microcontrollers sub-category of Integrated Circuits and serve as the programmable brain of nearly every modern electronic product. Key differentiating features include hardware peripherals: I2C (Master/Slave), SPI (Master/Slave), and UART/USART for asynchronous serial communication. The OTP program memory allows one-time factory or field programming, ideal for fixed-function, cost-sensitive applications. The 28-SOIC (0.295 inch / 7.50 mm width) package is the industry-standard wide-body SOIC footprint, compatible with hand-soldering and basic reflow profiles. Architecturally, the PIC16LC73B uses a Harvard RISC core with separate program and data buses, 8-deep hardware stack, and a deterministic instruction cycle of 4 oscillator clocks. Brown-out Reset (BOR), Power-on Reset (POR), and a Watchdog Timer (WDT) are integrated for embedded robustness. The '04' speed suffix indicates the 4 MHz oscillator maximum. Typical applications include industrial automation controllers, consumer appliances, low-end sensor nodes, UART/I2C/SPI peripheral interfaces, and legacy system upgrades where an OTP-programmed 8-bit MCU is sufficient. When designing with this part, note that OTP memory cannot be re-programmed in-circuit; select a flash-based equivalent (e.g., PIC16F73) if firmware iteration is expected. Operating temperature range per commercial grade is 0 C to +70 C; for industrial environments select the 'I' suffix variant. This page synthesizes distributor pricing, drop-in package alternatives from the same 28-SOIC footprint, and engineering design notes not found in the manufacturer datasheet.

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PIC16LC73BT-04/SS - 8-bit 4MHz PIC MCU, 7KB OTP, 28-SSOP | Microchip
PIC16LC73BT-04/SS

PIC16LC73BT-04/SS - 8-bit 4MHz PIC MCU, 7KB OTP, 28-SSOP | Microchip

The Microchip Technology PIC16LC73BT-04/SS is a low-power, high-performance 8-bit CMOS microcontroller belonging to the PIC16CXX mid-range family, featuring 4MHz operation, 7KB (4K x 14) of One-Time-Programmable (OTP) program memory, and 192 bytes of RAM, all housed in a 28-pin SSOP (Shrink Small Outline Package). It integrates 22 digital I/O pins and operates from a 3.3V or 5V supply, making it suited for low-power embedded applications. What is a PIC Microcontroller? A PIC (Peripheral Interface Controller) microcontroller is a small, self-contained computer-on-a-chip that integrates a CPU, memory (program + RAM), I/O peripherals, and often timers, ADC, and communication interfaces on a single die. PIC microcontrollers use a Harvard architecture with separate program and data buses, executing one instruction per instruction cycle (4 clock cycles) which gives deterministic timing. The mid-range PIC16 family sits between the baseline PIC10/12/16 and the enhanced PIC18 family, providing a rich peripheral mix while preserving the simple 35-instruction RISC instruction set. Key features of the PIC16LC73BT-04/SS include its CMOS fully-static design for low quiescent current, an 8-bit timer/counter with a 16-bit mode, 5 channels of 8-bit ADC, an asynchronous serial port (USART/SCI), an SPI/I2C-compatible synchronous serial port, and a watchdog timer for safety-critical embedded designs. The 'LC' part number suffix denotes the low-power CMOS variant of the PIC16C73B family. Architecturally, the PIC16LC73BT-04/SS uses a RISC-based CPU core with a 14-bit wide instruction word and an 8-bit data path. Its OTP program memory is field-programmable, making it appropriate for low- to mid-volume production runs. The 4MHz maximum clock rate yields 1 MIPS of processing throughput, sufficient for basic motor control, sensor interfacing, and human-interface logic. Typical applications include industrial control systems, automotive body electronics, consumer appliances, sensor-interface modules, and battery-powered portable instrumentation where low quiescent current is critical. The combination of small SSOP footprint, flexible I/O count, and integrated peripherals makes it well suited for space-limited multi-purpose embedded designs. When designing with the PIC16LC73BT-04/SS, ensure that the supply voltage is within the LC family limits (typically 2.5V to 6.0V), provide adequate decoupling at VDD/VSS, and verify that the chosen oscillator configuration matches the application's timing requirements. OTP parts cannot be electrically erased - choose OTP only when the firmware is final and stable. This page synthesizes distributor pricing, drop-in PIC16 family alternatives, and practical engineering guidance beyond what the manufacturer datasheet alone provides.

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PIC16LC73BT-04I/SO - 8-bit MCU, 7KB OTP, 4MHz, 28-SOIC | Microchip
PIC16LC73BT-04I/SO

PIC16LC73BT-04I/SO - 8-bit MCU, 7KB OTP, 4MHz, 28-SOIC | Microchip

The Microchip Technology PIC16LC73BT-04I/SO is an 8-bit PIC microcontroller from the PIC16CXX mid-range family, delivering 4 MHz CPU performance with 7 KB of one-time-programmable (OTP) program memory (4K x 14) and 192 bytes of data RAM, housed in a 28-pin SOIC package. It provides 22 digital I/O pins and integrates analog and digital peripherals including a multi-channel 8-bit ADC, two PWM Capture/Compare/PWM modules, a USART, an SSP module supporting SPI and I2C, and a brown-out reset circuit. An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data bus, optimized for embedded control tasks such as sensor reading, actuator driving, and simple protocol handling. Within the broader taxonomy, the PIC16LC73B belongs to the mid-range 8-bit MCU family -> 8-bit microcontroller -> microcontroller -> embedded processor -> semiconductor. The 'LC' prefix indicates a low-voltage CMOS variant, typically specified for operation down to 2.5 V, while the 'T' suffix denotes tape-and-reel packaging and 'I' denotes the industrial -40 C to +85 C operating range. Key features include Harvard architecture with separate program and data buses, 14-bit instruction word optimized for single-cycle execution on most instructions, two 8-bit timer/counters and one 16-bit timer/counter, a watchdog timer with on-chip RC oscillator, in-circuit serial programming (ICSP) via two pins, and an internal oscillator option. The mid-range core provides deterministic interrupt latency and a compact instruction set that simplifies assembler and C development with Microchip's MPLAB XC8 toolchain. Typical applications include consumer appliances, industrial control panels, low-end sensor interfaces, automotive body electronics (non-safety), and battery-powered instrumentation where the wide 2.5 V to 5.5 V operating range, 4 MHz throughput, and integrated peripherals reduce external component count. Design consideration: OTP memory is one-time-programmable, so firmware must be fully validated before programming; plan for prototypes on flash-based siblings such as PIC16F73 during development, then move to PIC16LC73B for cost-down production.

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PIC16LC73BT-04I/SS - 8-Bit PIC MCU, 7KB OTP, 4MHz, 28-SSOP | Microchip
PIC16LC73BT-04I/SS

PIC16LC73BT-04I/SS - 8-Bit PIC MCU, 7KB OTP, 4MHz, 28-SSOP | Microchip

The Microchip Technology PIC16LC73BT-04I/SS is an 8-bit PIC mid-range microcontroller built on a CMOS, fully-static architecture, featuring 7KB of one-time-programmable (OTP) program memory organized as 4K x 14 words, 192 bytes of RAM, and an integrated 4 MHz oscillator core. The part is housed in a 28-pin Shrink Small-Outline Package (28-SSOP) suitable for surface mounting, and operates across a supply voltage range of 2.5 V to 5.5 V with an industrial temperature grade of -40 °C to +85 °C, as documented on the Microchip product page. Background Knowledge: A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory, working RAM, and peripheral interfaces such as timers, capture/compare/PWM blocks, ADC converters, and serial ports. The PIC16CXX mid-range core used by the PIC16LC73BT belongs to the broader taxonomy of 8-bit microcontrollers -> microcontrollers -> integrated circuits -> semiconductors. Microcontrollers are the heart of embedded systems, replacing discrete logic by executing firmware that controls sensor reading, actuator driving, communication, and human-machine interfaces. Key features include 22 digital I/O lines, a hardware USART, MSSP (SPI/I2C) peripheral, three timers (Timer0, Timer1, Timer2), a 5-channel 8-bit ADC, dual analog comparators, and an internal watchdog timer. The 04 MHz clock speed suffix designates the maximum oscillator frequency, while the LC prefix indicates the low-voltage/low-power core variant suitable for 3.3 V and 5 V rails. The /SS suffix denotes the 28-SSOP package. Technical depth: The PIC16LC73BT uses a Harvard architecture with a separate 14-bit program word and 8-bit data path, an 8-level deep hardware stack, and 35 single-cycle instructions. The CMOS process delivers low quiescent current suitable for battery-backed applications, while the OTP program memory allows rapid prototyping without mask charges. The LC core variant draws less than 2 mA at 5 V / 4 MHz typical and supports operation down to 2.5 V, allowing portable or 3.3 V-only designs. Typical applications include industrial automation controllers, consumer appliance control boards, sensor signal conditioning front-ends, low-cost user-interface panels, and battery-powered data loggers. The PIC16LC73BT was also extended into higher-volume products such as the PIC16F73A flash-based migration path, but the OTP/B variant remains attractive for cost-sensitive production runs. Design consideration: OTP parts cannot be reprogrammed in-circuit, so firmware must be fully validated before programming. For field-upgradable firmware, select the PIC16F73A/SS flash variant instead; both share the same 28-SSOP pinout and pin-to-pin compatible. This page synthesizes distributor pricing, drop-in compatible variants, and engineering comparison context not found in the manufacturer datasheet alone.

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PIC16LC74A-04/L - 8-Bit 7KB OTP MCU 4MHz | Microchip PLCC-44
PIC16LC74A-04/L

PIC16LC74A-04/L - 8-Bit 7KB OTP MCU 4MHz | Microchip PLCC-44

The Microchip Technology PIC16LC74A-04/L is an 8-bit RISC microcontroller from the PIC16C7X family, featuring 7KB (4K x 14) of One-Time-Programmable (OTP) program memory, 192 bytes of RAM, and 33 digital I/O pins. It operates at a maximum 4 MHz instruction frequency, runs from a 2.5V to 5.5V supply (the LC low-voltage variant), and integrates an 8-channel 8-bit A/D converter for embedded analog applications. The device ships in a 44-pin PLCC (Plastic Leaded Chip Carrier) J-lead package, suiting through-hole or socketed industrial designs. What is an OTP microcontroller? An OTP MCU is a one-time-programmable variant of flash/EPROM-based microcontrollers where the program memory can be written exactly once using a programming tool, after which the code becomes permanent. Compared to UV-erasable EPROM MCUs, OTP parts offer lower cost, smaller package options, and faster programming cycles, making them typical in mass-production embedded products. The PIC16LC74A-04/L belongs to the PIC16C family, which sits between PIC10/PIC12 baseline parts and the PIC18 enhanced family in Microchip's 8-bit MCU taxonomy. Key differentiating features include 13 interrupt sources, 8-level hardware stack, 3 timer/counter modules, a USART/SCI serial port, MSSP (SPI/I2C) peripheral, Capture/Compare/PWM (CCP) module, and 8 channels of 8-bit A/D conversion. The "LC" suffix denotes a CMOS low-voltage variant that consumes less power than the standard "C" part, while the "04" speed grade denotes a 4 MHz maximum oscillator frequency. Typical applications include industrial control systems, appliance controls, sensor signal conditioning nodes, automotive body modules, low-cost instrumentation, and remote-control transmitter logic. The 33 I/O count and integrated peripherals make it especially useful for designs that need analog sensing plus digital I/O without an external ADC. Designers should note the OTP memory constraint: firmware must be fully verified before programming because the part cannot be reprogrammed. For development, consider the PIC16F74 (flash) variant on the same 44-pin PLCC footprint. A 100 nF decoupling capacitor close to VDD and proper oscillator layout are essential for reliable operation.

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PIC16LC74A-04/PQ - 4MHz 8-bit OTP MCU, 7KB | Microchip
PIC16LC74A-04/PQ

PIC16LC74A-04/PQ - 4MHz 8-bit OTP MCU, 7KB | Microchip

The Microchip Technology PIC16LC74A-04/PQ is a low-power CMOS 8-bit microcontroller from the PIC16C7X mid-range family, offering 4 MHz maximum operating frequency, 7 KB (4K x 14) of OTP program memory, and 192 bytes of RAM in a 44-pin MQFP (10x10 mm) package. It features 33 digital I/O pins, an integrated multi-channel 8-bit A/D converter, and the standard PIC16CXX peripheral set including timers, USART, SSP, and capture/compare/PWM modules. A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory, working RAM, and integrated I/O peripherals, designed to be embedded inside a larger electronic system to execute control logic in real time. Within Microchip's portfolio, the PIC16C7X family sits at the mid-range tier of the classic PIC architecture, between the baseline PIC16C5X/6X and the enhanced PIC16F/18F families. The 'LC' suffix designates a low-voltage CMOS variant; the 'A' suffix denotes the enhanced mid-range core with A/D and improved peripherals; the '04' suffix indicates a 4 MHz maximum clock; and the '/PQ' suffix indicates a 44-pin Plastic Metric Quad Flat Pack. Key features include 7 KB of one-time-programmable (OTP) EPROM program memory, 192 bytes of data RAM, three I/O ports (PORTA/PORTB/DLUT/ECT enabling up to 33 I/Os), a 5-channel 8-bit A/D converter, USART/SCI serial port, MSSP (SPI/I2C) module, two 8-bit timers with one 16-bit timer, capture/compare/PWM modules, and a programmable watchdog timer. The device supports 2.5V to 6.0V operation in the LC variant. Architecturally, the PIC16C7X uses a Harvard RISC core with separate program and data buses, 14-bit instruction word, and a 2-stage pipeline. The OTP memory allows one-time programming in volume manufacturing, while the LC+ low-voltage CMOS process supports battery-powered applications. The integrated A/D converter eliminates the need for external analog front-end components. Typical applications include industrial control systems, motor control, instrumentation, automotive subsystems, and consumer electronics requiring embedded intelligence with analog sensing. The wide operating voltage range and integrated peripherals make the PIC16LC74A well suited for battery-backed devices, smart sensors, and human-interface panels. When designing with this device, designers must consider that OTP memory cannot be re-programmed and that firmware revision requires a different part. The 4 MHz clock is adequate for basic control loops but limits signal-processing throughput; designs requiring higher MIPS should consider PIC18F or dsPIC alternatives. The 44-pin MQFP package is suited for surface-mount manufacturing but requires careful PCB layout for thermal dissipation. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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PIC16LC74A-04/PT - 4MHz 8-bit MCU 7KB OTP 44-TQFP | Microchip
PIC16LC74A-04/PT

PIC16LC74A-04/PT - 4MHz 8-bit MCU 7KB OTP 44-TQFP | Microchip

The Microchip Technology PIC16LC74A-04/PT is an 8-bit CMOS RISC microcontroller in the PIC16CXX mid-range family, housed in a 44-pin TQFP (PT) surface-mount package, with 7KB (4K x 14) One-Time Programmable (OTP) program memory, 192 bytes of RAM, and 33 digital I/O lines, operating at a maximum clock speed of 4 MHz. The LC suffix denotes a low-power CMOS process variant targeted at battery-friendly designs, and the 04 speed grade caps the oscillator at 4 MHz. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, working RAM, and peripheral interfaces onto one silicon die. The PIC16LC7x family belongs to the broader 8-bit microcontroller category, which sits below 32-bit microcontrollers and microprocessors in the silicon hierarchy. PIC16 mid-range devices are known for their deterministic 35-instruction RISC architecture, simple in-circuit programming, and rich peripheral integration that makes them well-suited for control-oriented embedded designs. Key features include 192 bytes of data RAM, 33 bidirectional I/O pins multiplexed with peripheral functions, an integrated 8-channel 8-bit Analog-to-Digital Converter (ADC), two Capture/Compare/PWM modules, a USART with addressable Receive/Transmit buffers, and a Synchronous Serial Port (SSP) that supports SPI and I2C master/slave operation. The part also provides two 8-bit timers plus one 16-bit timer, a watchdog timer with its own on-chip RC oscillator, and brown-out reset for supply monitoring. The integrated analog and digital peripherals let a single chip replace several discrete components in a control loop. Technically, the PIC16LC74A uses a 14-bit instruction set with a 2-stage pipeline and an 8-bit data path; OTP program memory is programmed once via ICSP. The device runs from 2.5 V to 6.0 V, has a maximum CPU speed of 4 MHz, and includes low-power SLEEP and brown-out reset for energy-constrained designs. Compared with flash-based PIC16F siblings, OTP variants are typically used in mature, cost-sensitive volume production where reprogrammability in-circuit is no longer needed. Typical applications include industrial instrumentation front ends, consumer appliance control boards, motor control with PWM, sensor-conditioning front-ends feeding the on-chip ADC, simple human-machine interface panels, and low-cost data-acquisition modules. The 33 I/O pins and the integrated peripherals also make it useful as a peripheral controller alongside a higher-end host processor in distributed embedded systems. When designing with the PIC16LC74A-04/PT, note that OTP memory cannot be erased and rewritten - production code must be final before programming. Plan the in-circuit serial programming (ICSP) header and decoupling early; a 100 nF decoupling capacitor on each supply pin and a bulk 10 uF cap near VDD are typical starting values for the 44-TQFP land pattern. This page combines verified-portrait distributor pricing, cross-referenced drop-in alternatives, and practical design notes to help engineers select the PIC16LC74A-04/PT quickly.

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PIC16LC74A-04I/L - 8-Bit 4MHz MCU, 7KB OTP, 44-PLCC | Microchip
PIC16LC74A-04I/L

PIC16LC74A-04I/L - 8-Bit 4MHz MCU, 7KB OTP, 44-PLCC | Microchip

The Microchip PIC16LC74A-04I/L is a low-power 8-bit CMOS microcontroller from the PIC16CXX mid-range family, operating at 4 MHz with 7 KB (4 K x 14) of OTP program memory and 192 bytes of RAM, housed in a 44-pin PLCC (J-Lead) package. Key features include 33 digital I/O lines, an integrated multi-channel analog-to-digital converter, and a wide operating voltage range of 2.5 V to 6.0 V that makes it suitable for battery-powered and industrial applications. The device is built on Microchip's mid-range 8-bit core architecture with a fully-static design, allowing the clock to be stopped without losing register state for low-power sleep modes. An industrial temperature grade (-40 °C to +85 °C) and on-chip peripherals such as timers, a synchronous/asynchronous serial port (USART/SCI), and capture/compare/PWM modules make it a versatile embedded controller. The PIC16LC74A-04I/L utilizes an enhanced Harvard architecture with separate program and data buses, and a 14-bit wide instruction word that improves arithmetic and bit-handling density. OTP (One-Time Programmable) program memory enables low-cost production for high-volume, fixed-code applications where field re-programmability is not required. The 'LC' suffix indicates the low-power CMOS process variant that supports the 2.5 V minimum supply voltage, lower quiescent current, and reduced switching noise compared with the standard EPROM-based PIC16C74 family. Typical applications include industrial control systems, instrumentation front panels, motor-control interface boards, and consumer appliances. The integrated ADC and ample I/O count also make this device well suited to sensor interfaces, smart-card readers, and embedded human-machine interface (HMI) controllers. When designing with this part, ensure that the OTP memory programming environment matches production volume economics, and validate oscillator stability at the application's extremes of voltage and temperature. For prototypes or low-volume builds, consider a flash-based PIC16F equivalent in the same PLCC-44 footprint to ease firmware iteration. This page synthesizes distributor pricing, drop-in PLCC-44 alternatives, and practical engineering guidance beyond what the manufacturer datasheet alone provides.

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PIC16LC74A-04I/P - 8-bit 4MHz MCU 7KB OTP 40-PDIP | Microchip
PIC16LC74A-04I/P

PIC16LC74A-04I/P - 8-bit 4MHz MCU 7KB OTP 40-PDIP | Microchip

The Microchip Technology PIC16LC74A-04I/P is an 8-bit RISC microcontroller from the PIC16CXX mid-range lineage, featuring a 4 MHz PIC core, 7 KB (4K x 14) of OTP program memory, and 192 bytes of RAM, all housed in a 40-pin PDIP through-hole package. It is a member of the LC (low-power CMOS) process variant, optimized for low-power operation across an industrial -40C to +85C temperature range with a 2.5V to 6V supply. What is an 8-bit microcontroller? An 8-bit microcontroller is a self-contained computing IC that integrates a CPU, memory (program + RAM), and peripherals on a single die. PIC microcontrollers use a Harvard RISC architecture with separate program/data buses, enabling deterministic instruction timing of one instruction per cycle (4 clock cycles). The PIC16C7X family to which PIC16LC74A belongs is a mid-range family, sitting between the baseline PIC10/12/16 and the enhanced PIC18 family in capability and pin count. Key features include 33 digital I/O lines, a 5-channel 8-bit Analog-to-Digital Converter (ADC), 2 capture/compare/PWM (CCP) modules, a USART for serial communication, an SSP (Synchronous Serial Port), three timers, and 11 interrupt sources. The OTP (One-Time Programmable) program memory means it can be programmed once and is intended for volume production, distinguishing it from windowed EPROM or flash-based siblings. The architecture pairs a 14-bit instruction word with an 8-bit data path, supporting 35 single-cycle instructions at 1 MIPS performance. The LC suffix denotes the low-voltage/low-power CMOS process, allowing operation down to 2.5V and reducing active power draw, suitable for battery-powered or power-budgeted designs. Typical applications include industrial control systems, automotive body electronics (non-safety), appliance control, sensor signal conditioning, and embedded instrumentation. Its 40-pin PDIP form factor remains favored for legacy designs, educational platforms, and through-hole manufacturing lines. When designing with PIC16LC74A-04I/P, ensure the OTP programming step is planned before PCB assembly. Use MPLAB IDE with a compatible programmer such as PICkit 3 or ICD for development; note that OTP parts are field-non-rewritable. This page consolidates distributor pricing, drop-in alternatives, and practical design notes not found in the standalone datasheet, helping engineers evaluate the PIC16LC74A-04I/P against modern flash-based equivalents for both new designs and legacy maintenance.

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PIC16LC74A-04I/PQ - 8-Bit 4MHz CMOS MCU | Microchip
PIC16LC74A-04I/PQ

PIC16LC74A-04I/PQ - 8-Bit 4MHz CMOS MCU | Microchip

The Microchip Technology PIC16LC74A-04I/PQ is an 8-bit CMOS RISC microcontroller in the PIC16C mid-range family, offering 4 MHz maximum operating frequency, 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 Metric Quad Flat Pack (MQFP 10x10 mm) with industrial temperature grade (-40C to +85C). It integrates an 8-channel 8-bit Analog-to-Digital Converter (ADC), two 8-bit timers plus one 16-bit timer, a Capture/Compare/PWM (CCP) module, a synchronous serial port (SSP) configurable as SPI or I2C, and a USART for asynchronous serial links. What is an OTP microcontroller? An OTP (One-Time-Programmable) microcontroller is a programmable IC whose on-chip program memory can be written exactly once after manufacture using a programming device. Unlike Flash-based MCUs (such as the PIC16F family) that allow in-circuit re-programming, OTP variants are optimized for cost-sensitive production runs where firmware is final and will never be updated in the field. The PIC16LC7x sits in Microchip's PIC16C mid-range architecture family - a RISC Harvard-architecture 8-bit core with 14-bit instruction words - bridging simple 8-bit controllers and more capable 16-bit PICs. Key features include an operating voltage range of 3.0V to 6.0V (the 'LC' prefix denotes the low-voltage CMOS variant), 5 mA typical operating current at 4 MHz/5V, an internal watchdog timer with on-chip RC oscillator for safe recovery from code lockups, and a power-on reset (POR) plus brown-out reset (BOR) circuit for reliable supply supervision. The 44-pin MQFP package is the largest MPN in the PIC16C7x family, providing dedicated pins for parallel port expansion, multiple interrupt sources, and an external memory interface. The 33 I/O pins can drive LEDs, keypads, character LCDs, and small relays directly through current-limited outputs. Typical applications include industrial control boards, appliance user interfaces, security and alarm panels, automotive body electronics, sensor conditioning front-ends, and low-cost embedded products where OTP cost savings outweigh the need for field re-programmability. The integrated ADC makes it suitable for direct thermistor, potentiometer, and transducer signal acquisition. When designing with this MPN, allocate board space for an in-system programming header if you plan to use a compatible Flash sibling (PIC16F74) during development - the pinout is identical so the same PCB can host either OTP (production) or Flash (prototype) parts. The PQ suffix denotes the Metric QFP tray package; the industrial (-I) suffix guarantees -40C to +85C operation. This page consolidates distributor pricing, drop-in pin-compatible substitutes, and practical layout notes for the PIC16LC74A-04I/PQ that supplement the original Microchip datasheet, helping engineers validate the part for legacy designs and production runs.

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PIC16LC74A-04I/PT - 8-Bit MCU, 4MHz, 7KB OTP, 44-TQFP | Microchip
PIC16LC74A-04I/PT

PIC16LC74A-04I/PT - 8-Bit MCU, 4MHz, 7KB OTP, 44-TQFP | Microchip

The Microchip Technology PIC16LC74A-04I/PT is an 8-bit CMOS microcontroller in the PIC16C mid-range family, offering 7KB (4K x 14) of One-Time-Programmable (OTP) program memory and 192 bytes of data RAM, housed in a 44-pin TQFP (10x10 mm) package. It operates at a maximum clock frequency of 4 MHz and supports a wide operating voltage range suitable for low-power designs, plus integrates 33 digital I/O pins and on-chip analog peripherals for mixed-signal embedded designs. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (ROM/Flash/OTP), data memory (RAM), I/O peripherals, and often timers, communication interfaces, and analog blocks. The PIC16C family sits within Microchip's mid-range architecture (14-bit instruction word), providing a balance of code density, peripheral integration, and deterministic interrupt response. Microcontrollers sit within the broader taxonomy of embedded processors -> microcontrollers -> 8-bit microcontrollers -> CMOS microcontrollers -> mid-range MCUs. Key features of the PIC16LC74A-04I/PT include its 4 MHz maximum oscillator frequency, integrated 8-bit A/D converter, USART/SCI and SSP (SPI/I2C) communication peripherals, multiple 8/16-bit timer modules, and 33 digital I/O lines. The wide operating voltage range and CMOS process yield low current typical draw at full operation, making it suitable for battery-powered and industrial applications. Architecturally, the PIC16LC74A uses a Harvard RISC core with 14-bit-wide instructions and 8-bit-wide data, allowing single-cycle instruction execution except for branches (2 cycles). The OTP program memory supports one-time programming for low-volume or production units where code stability is paramount, while the on-chip peripherals are mapped via a banked register architecture familiar to PIC mid-range developers. Typical applications include industrial control systems, automotive subsystems (non-safety-critical), appliance controls, sensor signal conditioning, low-speed data acquisition, and embedded control loops where deterministic timing and a mature toolchain (MPLAB, MPASM, C18) are valued. The 44-TQFP package provides ample I/O for moderate-complexity designs. When designing with this part, note that OTP memory cannot be re-programmed in-circuit; for prototype iterations, choose a Flash-based sibling such as the PIC16F74 or PIC16F874 in the same package. The 'I' suffix denotes the industrial temperature grade (-40C to +85C), and 'LC' denotes the low-voltage CMOS process variant.

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PIC16LC74AT-04/PT - 8-Bit PIC MCU 7KB OTP 4MHz TQFP-44 | Microchip
PIC16LC74AT-04/PT

PIC16LC74AT-04/PT - 8-Bit PIC MCU 7KB OTP 4MHz TQFP-44 | Microchip

The Microchip PIC16LC74AT-04/PT is a member of the PIC16C7X family of low-cost, high-performance, CMOS, fully-static 8-bit microcontrollers with integrated analog-to-digital (A/D) converters, in the PIC16CXX mid-range family. This LC variant features 7KB (4K x 14) of One-Time-Programmable (OTP) program memory, 192 bytes of RAM, and 33 digital I/O pins, all housed in a 44-pin TQFP (10x10 mm) package supplied on Tape and Reel. It operates from a 3.3V or 5V supply and is rated for an instruction cycle rate of 4 MHz (200 ns instruction cycle). An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, RAM, non-volatile program memory, and peripherals. The PIC16C7X family implements a RISC architecture with 35 single-cycle instructions, providing deterministic throughput and simplified C-language development. The integrated 8-channel, 8-bit A/D converter, synchronous serial port (SSP) for SPI/I2C, USART, and capture/compare/PWM modules make it a complete mixed-signal control solution. This places the PIC16LC74AT-04/PT in the wider hierarchy of MCU -> 8-bit MCU -> mid-range MCU -> microcontroller -> embedded controller -> semiconductor. Key features of this part include: a wide operating voltage range that supports both 3.3V and 5V rails, on-chip Power-on Reset and Power-up Timer, Watchdog Timer with its own on-chip RC oscillator for reliable operation, and an operating temperature range of 0C to +70C (commercial). The 4 MHz oscillator with 1:1 instruction-to-oscillator ratio produces 1 MIPS throughput, adequate for cost-sensitive control loops. Brown-out Reset circuitry and code protection protect field-deployed firmware. The 33 I/O pins support direct interfacing of keys, LEDs, LCDs, sensors and actuators without external glue logic. Architecturally, the device uses Harvard memory architecture with separate program and data buses, allowing instruction fetch and operand access in a single clock cycle. The OTP program memory is factory- or development-tool-programmable and is well-suited to low- to medium-volume production. The integrated peripherals are configured through Special Function Registers mapped into the data memory space, and interrupts are vectored with on-chip hardware context save. Typical applications include industrial process control, appliance control (washing machines, microwave ovens, HVAC), security and alarm systems, automotive body electronics, and battery chargers. The integrated A/D and PWM simplify motor control loops, while the USART enables networked sensor and metering applications. When designing with the PIC16LC74AT-04/PT, ensure the ICSP clock and data lines are accessible for in-circuit programming and debugging. Use a 100 nF decoupling capacitor close to each VDD pin and a bulk capacitor at the regulator output. Note that this OTP variant is intended for development and low-volume production; for higher volumes, a mask-ROM or Flash equivalent (such as the PIC16F74) is recommended. This page synthesizes distributor pricing, package-compatible drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.

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PIC16LC74AT-04I/PQ - 8-Bit 4MHz MCU, 7KB OTP, 44-MQFP | Microchip
PIC16LC74AT-04I/PQ

PIC16LC74AT-04I/PQ - 8-Bit 4MHz MCU, 7KB OTP, 44-MQFP | Microchip

The Microchip Technology PIC16LC74AT-04I/PQ is an 8-bit CMOS microcontroller from the PIC16C family, featuring 7KB (4K x 14) One-Time-Programmable (OTP) program memory, 192 bytes of RAM, and a 4MHz maximum operating frequency in a 44-pin MQFP (10x10 mm) surface-mount package. It integrates a 5-channel 8-bit Analog-to-Digital Converter (ADC), supports I2C, SPI, and UART/USART communication peripherals, and includes Brown-out Detect/Reset and Power-On Reset for robust embedded operation. A microcontroller (MCU) is a single-chip computer containing a CPU core, program and data memory, I/O peripherals, and often analog interfaces. The PIC16C family is Microchip's mid-range 8-bit architecture using a Harvard RISC core with a 14-bit instruction word, well-suited to deterministic real-time control in industrial, automotive, and consumer applications. The PIC16LC74A series specifically targets low-voltage (2.5V-6V) operation with integrated ADC, making it a compact system-on-chip for cost-sensitive embedded designs. Key features include 4MHz clock speed, an integrated 8-bit ADC with five input channels, three serial communication interfaces (I2C, SPI, USART), and 33 digital I/O pins. Brown-out Reset (BOR) and Power-On Reset (POR) protect code execution during supply transients. The wide 2.5V to 6V supply range simplifies integration into 3.3V and 5V systems. The 'LC' suffix denotes the low-power CMOS process, and the 'I' grade indicates industrial temperature range (-40C to +85C). The device uses an OTP EPROM program memory architecture, programmed once via Microchip's ICSP interface. The 192-byte RAM is sufficient for small data buffers and stack operations in control loops. The mid-range 14-bit instruction set provides 35 single-word instructions and a 2-level hardware stack. With 33 I/O pins, this MCU can drive keypads, LCDs, and sensor interfaces directly. Typical applications include industrial automation controllers, consumer electronics, automotive body electronics, HVAC control systems, and low-cost sensor interface boards. The combination of integrated ADC, multiple serial interfaces, and OTP memory makes it well suited to fixed-function appliances and instrumentation. When designing with this MCU, note that OTP memory cannot be erased - use the windowed CERDIP version for development and OTP for production. A 20 MHz oscillator can be used with the internal PLL not present on this part - clock input drives the instruction cycle directly at Fosc/4. Ensure decoupling capacitors are placed close to VDD/VSS pins. This page synthesizes distributor availability, parametric drop-in alternatives, and practical design notes not aggregated on any single manufacturer page.

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PIC16LC74AT-04I/PT - 8-bit MCU, 7KB OTP, 33 I/O, 4MHz | Microchip
PIC16LC74AT-04I/PT

PIC16LC74AT-04I/PT - 8-bit MCU, 7KB OTP, 33 I/O, 4MHz | Microchip

The Microchip Technology PIC16LC74AT-04I/PT is an 8-bit RISC microcontroller from the PIC16C7X series, offering 7KB of One-Time Programmable (OTP) program memory and 192 bytes of RAM in a 44-pin TQFP package. The device operates at 4 MHz maximum clock frequency and supports dual-voltage operation at 3.3V and 5V with 33 I/O pins for embedded control tasks. An OTP microcontroller is a type of embedded processor whose program memory can be written exactly once during production programming, not repeatedly rewritten like flash-based MCUs. The PIC16LC74A belongs to Microchip's mid-range PIC16 family, which sits within the broader 8-bit microcontroller category and serves cost-effective deterministic control tasks where simpler processing suffices than 16-bit or 32-bit cores. Key features include an integrated Analog-to-Digital (A/D) converter, capture/compare/PWM (CCP) modules, multiple timers, and a synchronous/asynchronous serial port. The device uses a Harvard architecture with separate program and data buses, providing deterministic instruction execution suitable for real-time control. The 'LC' suffix indicates the low-voltage CMOS variant optimized for demanding 3.3V to 5V operation with reduced power consumption. Architecturally, the PIC16LC74AT-04I/PT employs a 14-bit instruction word with 35 instructions, providing a favorable code-density versus MCU capability ratio for embedded control applications. The 'T' suffix indicates tape-and-reel packaging for high-volume assembly, while the 'I' suffix denotes the industrial temperature range of -40C to +85C. Typical applications include industrial process control, automotive body electronics, sensor signal conditioning, motor control, and consumer white goods. The integrated A/D converter with multiple channels makes the device suitable for analog sensor interfaces in cost-sensitive embedded designs. When designing with this device, ensure the program memory is correctly allocated before OTP programming since OTP memory cannot be erased. Plan for the industrial temperature range and implement appropriate watchdog reset strategies for reliable operation in electrically harsh industrial environments.

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PIC16LC74B-04/L - 8-Bit OTP MCU, 4MHz, 7KB | Microchip | Embedded
PIC16LC74B-04/L

PIC16LC74B-04/L - 8-Bit OTP MCU, 4MHz, 7KB | Microchip | Embedded

The Microchip Technology PIC16LC74B-04/L is an 8-bit 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 33 digital I/O pins, housed in a 44-pin PLCC (J-lead) package measuring 16.59 x 16.59 mm. It operates at a 4 MHz instruction clock from a 2.0V to 6.0V supply, making it suitable for both 3.3V and 5V embedded systems. The /L suffix designates the PLCC package, and the -04 speed grade indicates a 4 MHz maximum oscillator frequency. A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory (program + data), peripherals, and I/O onto one die. The PIC16LC74B belongs to the mid-range PIC architecture, sitting in the hierarchy: PIC16LC74B -> PIC16CXX family -> 8-bit PIC microcontroller -> MCU -> embedded processor -> integrated circuit. Mid-range PICs use a 14-bit instruction word and a Harvard architecture with separate program/data paths, offering deterministic instruction timing useful for real-time control. Key features include 33 I/O pins with high-current sink/source, multiple peripherals (USART, SSP/SPI/I2C, 8-channel 8-bit ADC, capture/compare/PWM, timers), and a 15-bit program counter that addresses 32KB of program space. The 'LC' prefix indicates a low-power CMOS variant supporting 2.0V to 6.0V VDD, while the standard PIC16C74B (no L) supports 4.2V to 6.0V. The OTP memory is programmed once and is non-erasable, making this part suited for production volumes where field firmware updates are not required. This PIC16LC74B-04/L is intended for embedded control applications requiring deterministic 8-bit performance in a surface-mount PLCC footprint. Common uses include industrial controllers, motor control front-ends, sensor interface boards, consumer appliances, and legacy equipment retrofits. Because it uses a 44-pin PLCC package with through-hole-style J-leads, it is also socketable, simplifying prototyping and field replacement. Engineers migrating from the PIC16C74B benefit from pin and code compatibility per Microchip's PICmicro Pin and Code Compatibility Chart. Design considerations: ensure VDD is within the LC-variant range (2.0V-6.0V); use the MCLR reset pin with a proper pull-up and, if needed, an external brown-out supervisor; configure the oscillator mode (RC/HS/XT/LP) per the application. OTP programming requires a Microchip programmer (PICSTART Plus, ICD, etc.) at production time - plan device provisioning accordingly. This page synthesizes distributor pricing, lifecycle signals, drop-in PIC16-family alternatives, and practical design notes for the PIC16LC74B-04/L not found in a single datasheet view.

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PIC16LC74B-04/P - 8-Bit 4MHz 7KB OTP MCU | Microchip Technology
PIC16LC74B-04/P

PIC16LC74B-04/P - 8-Bit 4MHz 7KB OTP MCU | Microchip Technology

The Microchip Technology PIC16LC74B-04/P is a low-power 8-bit RISC CMOS microcontroller in the PIC16CXX series, delivering 4 MHz CPU performance with 7 KB of OTP program memory in a 40-pin PDIP through-hole package. The device features a high-performance RISC CPU with 35 single-word instructions, a 200 ns instruction cycle at 20 MHz, 192 bytes of data RAM, and 33 digital I/O pins suitable for embedded control applications. An 8-bit microcontroller (MCU) is a compact, single-chip computer built around an 8-bit data bus, integrating CPU core, program memory, data RAM, I/O peripherals, and timers onto one silicon die. PIC microcontrollers from the mid-range PIC16CXX family occupy the position of microcontrollers -> 8-bit MCU -> embedded controller -> semiconductor IC in the broader component taxonomy. Low-power (LC) variants such as the PIC16LC74B reduce supply current compared to standard PIC16C parts, extending battery life in portable and industrial designs. Key features of the PIC16LC74B-04/P include 4K x 14 words of OTP program memory, 192 x 8 bytes of RAM, interrupt capability with up to 12 internal/external sources, and a fully-static CMOS design that allows DC to 4 MHz operation for the -04 speed grade. The 33 I/O pins individually support input or output direction, and integrated peripherals typically include timers, a USART, an SSP, and an 8-bit ADC depending on the PIC16CXX family variant. The 40-pin PDIP package is through-hole mounted for easy prototyping, breadboarding, and legacy system retrofits. The PIC16LC74B architecture uses a Harvard-style memory map separating program (14-bit wide instruction words) and data spaces, which enables single-cycle instruction fetch except for program branches that require two cycles. This RISC-based approach simplifies coding while still providing deterministic timing for real-time control loops. Designers familiar with PIC mid-range assembly or C compilers such as XC8 can target the part with minimal learning curve. Typical applications include industrial automation controllers, sensor interface modules, consumer white goods, low-power battery instruments, and educational embedded platforms where through-hole packages simplify repair and rework. The OTP memory makes the part suitable for mature, fixed-function designs where firmware will not require in-field updates. When designing with the PIC16LC74B-04/P, confirm the oscillator configuration (RC, XT, LP, HS) matches the chosen crystal or resonator, and observe the maximum clock input of 20 MHz for the -04 speed grade (4 MHz maximum CPU clock). The OTP device cannot be reprogrammed, so production programming via a Microchip device programmer is mandatory before PCB assembly.

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PIC16LC74B-04/PQ - 8-bit 4MHz MCU, 7KB OTP, 44-MQFP | Microchip
PIC16LC74B-04/PQ

PIC16LC74B-04/PQ - 8-bit 4MHz MCU, 7KB OTP, 44-MQFP | Microchip

The Microchip Technology PIC16LC74B-04/PQ is a low-power, 8-bit CMOS RISC microcontroller from the PIC16CXX mid-range family, featuring 4MHz maximum clock speed, 7KB (4K x 14) One-Time-Programmable (OTP) program memory and 192 bytes of RAM, housed in a 44-pin MQFP (10x10 mm) surface-mount package. The "LC" prefix denotes the low-voltage variant operating from 2.5V to 5.5V supplies, while the trailing "04" suffix specifies a 4MHz oscillator, and the "/PQ" suffix denotes the 44-MQFP industrial-tray package variant. The device delivers 200ns instruction execution with only 35 single-word instructions, achieving 5 MIPS throughput at full clock speed. A microcontroller is a programmable single-chip computer that integrates a CPU, memory, and peripherals; the PIC16CXX mid-range family extends this with EEPROM/OTP program memory and analog peripherals. As the third generation of Microchip's mid-range architecture, the PIC16LC74B sits in a hierarchy of PIC16C63A/65B/73B/74B devices, sharing a fully-static CMOS design that supports low-power and battery-backed operation, a critical advantage in industrial controls and instrumentation where the supply may be unstable. Key features include 33 digital I/O pins, two 8-bit timers plus one 16-bit timer, a 10-bit multi-channel Analog-to-Digital Converter (ADC), two PWM modules, a Universal Synchronous/Asynchronous Receiver-Transmitter (USART) for serial communication, and a synchronous serial port (SSP) supporting SPI and I2C. The integrated In-Circuit Serial Programming (ICSP) interface enables field firmware updates without removing the part from the board, and the device supports in-circuit debugging. Power-saving features include multiple sleep modes (SLEEP), a watchdog timer with its own on-chip RC oscillator, and programmable brown-out reset. The architecture combines a Harvard-design CPU with separate program and data buses, allowing instruction fetch and operand read to occur in the same cycle. This dual-bus structure is the source of the family's celebrated code density and deterministic interrupt latency. The 14-bit instruction word keeps loop bodies short, and the 8-level stack plus hardware context save on interrupt entry simplify real-time programming. Typical applications include industrial control panels, HVAC thermostats, motor-control pre-drivers (with the PWM/CCP modules), sensor signal conditioning (using the ADC), and low-power data-acquisition instruments. The 44-MQFP footprint is well-suited to mid-density designs that need analog inputs and serial connectivity without resorting to larger 64-pin packages. A critical design consideration is OTP volatility: because OTP memory is programmed once and cannot be erased, prototypes and low-volume production should use the windowed (JW) or flash-based PIC16F74 variant instead. Always specify the correct operating temperature grade for your environment. This page synthesizes distributor pricing, drop-in same-brand alternatives, and design notes not found on a single manufacturer datasheet page.

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PIC16LC74B-04I/L - 8-Bit 4MHz PIC MCU 7KB OTP 44-PLCC | Microchip
PIC16LC74B-04I/L

PIC16LC74B-04I/L - 8-Bit 4MHz PIC MCU 7KB OTP 44-PLCC | Microchip

The Microchip Technology PIC16LC74B-04I/L is a low-power 8-bit CMOS RISC microcontroller from the PIC16CXX mid-range family, housed in a 44-pin PLCC (Plastic Leaded Chip Carrier) package. The device integrates a high-performance RISC architecture with 4 MHz maximum clock input, 7 KB (4K x 14) of One-Time-Programmable (OTP) program memory, 192 bytes of RAM, and 33 digital I/O pins. It is designed for low-voltage operation, supporting both 3.3 V and 5 V rails, making it compatible with LC (low-power CMOS) designs. A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory, working RAM, and configurable I/O peripherals. The PIC16LC74B belongs to the RISC (Reduced Instruction Set Computer) family, which executes instructions in a single cycle (except program branches, which require two cycles). Within the broader semiconductor taxonomy, MCUs are part of integrated circuits in the microcontroller sub-category, sitting beneath logic ICs and alongside microprocessors in embedded computing hierarchies. Only 35 single-word instructions are required to program the device, dramatically reducing development complexity for embedded engineers. Key features include a 200 ns instruction cycle at 20 MHz maximum clock, hardware peripherals such as timers, a USART for serial communication, and a multi-channel 8-bit ADC. The OTP memory supports one-time programming for production units, while the LC suffix denotes the low-power CMOS process variant optimized for 3.3 V battery-powered designs. The 33 I/O pins are organized into multiple ports with individual direction control, supporting digital input/output, peripheral functions, and interrupt-driven event responses. Industrial-grade temperature range (-40C to +85C) is indicated by the "I" suffix in the part number. The PIC16LC74B-04I/L is widely deployed in industrial control systems, instrumentation, low-power embedded appliances, sensor interfaces, and legacy 8-bit designs requiring deterministic interrupt response. It is also commonly used in educational platforms and prototyping environments. The 44-PLCC package provides through-hole mounting with J-leads, allowing socket-based development and field replacement. According to Microchip product documentation, the LC variant targets portable and battery-operated applications where current consumption must remain below a few milliamps in typical operating modes. When designing with this part, verify that the OTP memory size (7 KB) is sufficient for your firmware image and select the appropriate oscillator configuration (XT, HS, RC, or LP) for your system clock. The "04" speed grade denotes 4 MHz maximum operation, suitable for low-power timing-sensitive applications. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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