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PIC16F871-I/L - 8-bit 20MHz 3.5KB Flash MCU 44-PLCC | Microchip
PIC16F871-I/L

PIC16F871-I/L - 8-bit 20MHz 3.5KB Flash MCU 44-PLCC | Microchip

The Microchip Technology PIC16F871-I/L is a mid-range 8-bit CMOS flash-based microcontroller from the PIC16 family, executing instructions in 200 ns with only 35 single-word instructions, housed in a 44-pin Plastic Leaded Chip Carrier (PLCC) package. Its headline parameters are 3.5 KB of flash program memory, 128 bytes of SRAM, 64 bytes of EEPROM data memory, and a 20 MHz maximum clock speed supporting a 4-5.5 V supply range with 33 I/O pins. The PLCC socket-mount package enables easy prototyping and field replacement on legacy through-hole and socketed carrier boards. A PIC16-family 8-bit microcontroller is a RISC-based computing core that combines a small instruction set, on-chip non-volatile flash memory, and a rich set of analog and digital peripherals. Within the broader IC hierarchy, a PIC16 sits below 32-bit Cortex-M0+/M4 devices in capability but offers a mature, low-cost, low-power solution for embedded control tasks. The PIC16F871 specifically belongs to the mid-range "F" flash-based sub-family, providing in-system self-programming and nanoWatt power management for energy-conscious designs. Key features include 8 channels of 10-bit Analog-to-Digital (A/D) conversion, two additional timers beyond the standard Timer0, a capture/compare/PWM module, a Universal Asynchronous Receiver Transmitter (USART) for serial communication, and on-chip in-circuit debug (ICD) support. The 33 digital I/O lines provide flexible pin assignment for sensor interfacing, pushbuttons, LED drivers, and communication busses. The 64-byte EEPROM is byte-erasable and rated for high write-cycle endurance, making it well suited for storing calibration coefficients and user configuration data that must survive power cycles. Architecturally, the PIC16F871 uses Microchip's enhanced Harvard architecture with separate program and data buses, enabling simultaneous instruction fetch and operand access for predictable deterministic timing. The 14-bit instruction word and 8-bit data path, combined with hardware stack and dedicated peripheral registers, yield compact code density and predictable interrupt latency. In-circuit serial programming (ICSP) and ICD allow firmware updates and live debugging through just two I/O pins, reducing the prototype-to-production gap. Typical applications include industrial control front-ends, sensor signal conditioning nodes, HVAC actuator controllers, and consumer appliance user-interface boards where a mid-range 8-bit core is sufficient. The on-board 10-bit ADC and PWM capture/compare channel simplify closed-loop motor and process control designs. When designing with this part, verify the operating temperature grade ("-I" = industrial -40 to +85 °C) against your enclosure thermal envelope, and ensure your programmer supports the PIC16F871 ICD pin assignment. A 100 nF decoupling capacitor placed within 5 mm of VDD is essential for clean ADC readings. This page synthesizes distributor pricing from Mouser, DigiKey, and Octopart alongside pin-compatible PIC16F871 drop-in alternatives and practical design notes not consolidated in the manufacturer datasheet.

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PIC16F871-I/P - 8-Bit 20MHz 3.5KB Flash MCU 40-PDIP | Microchip
PIC16F871-I/P

PIC16F871-I/P - 8-Bit 20MHz 3.5KB Flash MCU 40-PDIP | Microchip

The Microchip Technology PIC16F871-I/P is an 8-bit CMOS flash-based microcontroller from the PIC16 mid-range family, delivering 20 MHz (200 ns) instruction execution in a 40-pin PDIP through-hole package. The device integrates 3.5 KB of FLASH program memory (2K x 14), 128 bytes of RAM, 64 bytes of EEPROM data memory, and 33 digital I/O pins, combining high performance with the PIC architecture's signature 35-instruction RISC core for easy programming. A microcontroller (MCU) is a single-chip computer that contains a processor core, memory, and programmable input/output peripherals. Within the broader taxonomy, the PIC16F871 is a member of the 8-bit MCU class (below 32-bit Cortex-M microcontrollers), specifically the PIC16F mid-range family introduced by Microchip Technology as an evolution of the PIC16C5X, PIC12CXXX, and PIC16C7X lines. It belongs to the integrated circuit (semiconductor) hierarchy and serves as a power management/control subsystem in embedded designs. Key differentiating features include 8 channels of 10-bit Analog-to-Digital conversion, two additional timers (extending the standard timer count to three), a Capture/Compare/PWM (CCP) module, and a Universal Synchronous/Asynchronous Receiver Transmitter (USART). The 33 I/O pins are organized into five ports (RA, RB, RC, RD, RE) and can source/sink up to 25 mA per pin, enabling direct LED drive without external buffers. In-circuit debugging is supported via the ICD interface, while in-application self-programming allows field firmware updates. The PIC16F871 uses a Harvard bus architecture with separate program and data paths, allowing instruction fetch and operand read in a single cycle. Built around a CMOS flash process, it provides typical power consumption below 2 mA at 5 V and 20 MHz, with sleep current in the microampere range, making it suitable for both line-powered industrial equipment and battery-influenced designs. The USART supports RS-232/RS-485 communication, while the CCP module enables precision timing, PWM motor control, and event capture. Typical applications include industrial control logic boards, white-goods and appliance control, sensor signal conditioning, simple human-machine interfaces, motor-driver control with PWM, and legacy PIC16 system upgrades. The 40-pin PDIP package makes it friendly for hobbyists, education, and through-hole prototyping, while still offering industrial-grade (-40C to +85C) temperature operation under the "-I" suffix designation. When designing with this part, pay attention to the 40-pin DIP footprint versus the 28-pin PIC16F870/871 variants - the 40-pin device exposes PORTE (RE0/RE1/RE2) and additional PORTD pins. Ensure the MCLR pin is properly pulled high and that the oscillator configuration (RC/HS/XT/LP) matches the chosen resonator. The "I" suffix indicates the industrial temperature grade of -40C to +85C, so verify your application thermal envelope. This page synthesizes distributor pricing for PIC16F871-I/P from DigiKey, Mouser, and Octopart alongside drop-in alternatives, application context, and design notes that are not aggregated in the manufacturer datasheet alone. Engineers can use the comparison and FAQ sections to evaluate this part against newer PIC18 and ATSAM alternatives.

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PIC16F871-I/PT - 8-Bit 3.5KB Flash MCU 20MHz TQFP-44 | Microchip
PIC16F871-I/PT

PIC16F871-I/PT - 8-Bit 3.5KB Flash MCU 20MHz TQFP-44 | Microchip

The Microchip Technology PIC16F871-I/PT is a mid-range 8-bit CMOS FLASH-based microcontroller delivering 20 MHz (200 ns instruction cycle) performance in a 44-pin TQFP (10x10 mm) package. It integrates 3.5 KB (2K x 14) of self-programmable FLASH program memory, 128 bytes of SRAM, and 64 bytes of EEPROM data memory, with 33 digital I/O lines and a 10-bit multi-channel Analog-to-Digital converter. A microcontroller (MCU) is a single-chip computer containing a CPU core, non-volatile program memory, working RAM, and a range of peripheral interfaces such as timers, ADCs and communication blocks. PIC16F family MCUs use Microchip's enhanced RISC architecture with 14-bit wide opcodes and 35 single-word instructions, placing them within the broader hierarchy: PIC16F -> mid-range 8-bit MCU -> embedded microcontroller -> semiconductor IC. The PIC16F871 also supports In-Circuit Debugging (ICD) and nanoWatt power management for low-power applications. Key features of the PIC16F871 include eight 10-bit ADC channels (versus five on the smaller PIC16F870), two additional timers, Capture/Compare/PWM (CCP) peripherals, a Universal Synchronous/Asynchronous Receiver-Transmitter (USART), 64-byte EEPROM and 33 I/O pins. The wide 4.0 V to 5.5 V supply range and 20 MHz clock let the device sustain up to 5 MIPS of throughput, which is sufficient for motor control, sensor conditioning and human-machine interface (HMI) tasks. Typical applications span industrial control boards, low-cost data acquisition nodes, automotive body electronics (non-safety), appliance user-interface panels, and consumer peripherals. The PIC16F871's combination of internal EEPROM, ADC and USART also suits remote sensor hubs where the CCP/PWM blocks drive actuators or indicators. Designers should note the parallel-slave-port pinout on the 44-pin TQFP is not present on the 28-pin PIC16F870 variant; PCB layouts are therefore not interchangeable between the two packages. The 'I' suffix denotes the industrial -40C to +85C temperature range, and '/PT' indicates the TQFP-44 package on tape-and-reel. This page synthesizes distributor pricing, same-brand and cross-brand drop-in alternatives, and practical design notes for the PIC16F871 that are not bundled in the manufacturer datasheet alone.

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PIC16F871T-E/L - 8-bit 20MHz Flash MCU, 44-PLCC | Microchip
PIC16F871T-E/L

PIC16F871T-E/L - 8-bit 20MHz Flash MCU, 44-PLCC | Microchip

Microchip Technology PIC16F871T-E/L is an 8-bit PIC16-family CMOS Flash microcontroller that executes a 35-instruction RISC instruction set in 200 ns per instruction at 20 MHz clock speed. The device integrates 3.5 KB (2K x 14) of self-programmable Flash program memory, 128 bytes of SRAM, 64 bytes of EEPROM data memory, and a 16-I/O port structure in a 44-pin PLCC (J-lead) package with industrial-grade -40C to +125C operating range. 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, ADC, communication ports, and GPIO. PIC microcontrollers use a Harvard RISC architecture that separates program and data buses, enabling single-cycle instruction fetch and deterministic timing. The PIC16F871 sits in Microchip's mid-range x14 family, hierarchically classified as: microcontroller -> 8-bit MCU -> PIC16 mid-range -> Flash MCU -> mixed-signal MCU with on-chip ADC. Key features include 8 channels of 10-bit Analog-to-Digital conversion, a USART module for asynchronous/synchronous serial communication, an MSSP module supporting SPI and I2C (master/slave), a 16-bit capture/compare/PWM module, two 8-bit timers, a watchdog timer with dedicated on-chip RC oscillator, in-circuit serial programming (ICSP) via two pins, and nanoWatt technology for dynamic power management. The device operates from 4.0 V to 5.5 V with low-power sleep and idle modes suitable for battery-backed designs. Architecturally, the PIC16F871 employs an enhanced mid-range core with a 14-bit wide program word and 8-bit data path. Its flash program memory supports self-programming under firmware control, allowing field updates without external programmers. The integrated 10-bit ADC with 8 input channels provides adequate resolution for sensor signal acquisition in industrial control loops. On-chip peripherals provide sub-microsecond timing precision and bus protocols. Typical applications include industrial control and automation, HVAC sensor interfaces, motor control for small stepper/brushless DC drives, automotive body and interior electronics, instrumentation and metering, low-cost user-interface panels, and home appliance control boards. The wide operating temperature range supports automotive underhood and outdoor industrial deployments. When designing with this MCU, ensure decoupling: place one 100 nF ceramic capacitor per power pin within 2 mm of the package, plus a bulk 10 uF tantalum at the regulator output. The MCLR reset pin requires a 10 kohm pull-up to VDD; do not leave it floating. For ICSP, dedicate dedicated pads for PGD/PGC so a debugger can be attached without board rework. This page synthesizes distributor pricing, package-specific drop-in alternatives, and practical design notes not found in the bare manufacturer datasheet, enabling faster BOM validation and second-source qualification for PIC16F871 designs.

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PIC16F871T-I/L - 8-bit 20MHz 3.5KB Flash MCU | Microchip | PLCC-44
PIC16F871T-I/L

PIC16F871T-I/L - 8-bit 20MHz 3.5KB Flash MCU | Microchip | PLCC-44

The Microchip Technology PIC16F871T-I/L is a high-performance 8-bit CMOS FLASH-based microcontroller in a 44-pin PLCC (L) package, featuring 3.5KB (2K x 14 words) of Flash program memory, 128 bytes of RAM, and 64 bytes of EEPROM data memory. It operates at up to 20 MHz clock input with a 200 ns instruction cycle, executes only 35 single-word instructions, and supplies 33 I/O pins, making it suitable for embedded control applications demanding fast deterministic response. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash/ROM), working memory (RAM), non-volatile data memory (EEPROM), and configurable I/O peripherals on a single IC. Within the broader taxonomy, the PIC16F871 belongs to the 8-bit PIC16 mid-range family, which sits under the RISC microcontroller hierarchy, the broader embedded processor category, and ultimately the semiconductor device family. This class of MCUs is widely used for deterministic, low-power embedded control in industrial, consumer, and automotive subsystems where predictable real-time behavior outweighs raw computational throughput. Key features include 8 channels of 10-bit Analog-to-Digital Conversion (ADC), a USART module for asynchronous serial communication, an MSSP module supporting both SPI and I2C, and 64 bytes of self-programmable EEPROM. The device operates from 4.0V to 5.5V across an industrial -40C to +85C temperature range and supports in-circuit serial programming (ICSP) plus in-circuit debugging (ICD), enabling rapid prototyping and field updates via Microchip's MPLAB ecosystem. The PIC16F871T-I/L uses Microchip's enhanced mid-range 14-bit instruction architecture with a Harvard-style bus that separates program and data memory, yielding deterministic instruction timing. Built on low-power CMOS FLASH process technology, the device supports multiple oscillator modes including RC, XT, HS, and LP, with nanoWatt-style power management features. The integrated brown-out reset (BOR), watchdog timer (WDT), and programmable code protection enhance reliability in unattended industrial installations. Typical applications include industrial control systems, sensor interface boards, motor control front-ends, instrumentation data acquisition, building automation nodes, and low-cost consumer embedded devices. The wide I/O count also suits HVAC thermostats, security panels, and small appliances where multiple relays, keypads, and displays must be driven simultaneously. Designers should budget oscillator margin (HS mode crystals need load capacitance matching) and ensure decoupling capacitor placement adheres to Microchip's recommended layout, with separate analog (AVDD) and digital (VDD) rails when using the ADC. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.

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PIC16F872-E/SP - 8-bit Flash MCU, 3.5KB, 28-Pin SPDIP | Microchip
PIC16F872-E/SP

PIC16F872-E/SP - 8-bit Flash MCU, 3.5KB, 28-Pin SPDIP | Microchip

The Microchip Technology PIC16F872-E/SP is an 8-bit CMOS Flash-based mid-range PIC microcontroller packaged in a 28-pin SPDIP (Skinny Plastic DIP) tube format. It delivers 200 ns instruction execution speed with only 35 single-word instructions, packs 3.5 KB of Flash program memory and 128 bytes of SRAM, and operates at clock speeds up to 20 MHz. The integrated peripherals include 5 channels of 10-bit Analog-to-Digital conversion, 64 bytes of EEPROM data memory, two additional 8/16-bit timers with capture/compare/PWM, and a Synchronous Serial Port that is software-configurable as either 3-wire SPI or 2-wire I2C. Sixteen digital I/O pins (22 I/O total per Mouser listing) are available across the 28-pin package. A microcontroller (MCU) is a single-chip computer containing a processor core, non-volatile program memory, volatile data memory, and configurable peripherals on one integrated circuit. PIC16 mid-range microcontrollers sit in the hierarchy: PIC16F872 -> PIC16 mid-range family -> 8-bit MCU -> microcontroller -> embedded processor -> semiconductor. PIC MCUs use a Harvard RISC architecture with separate program and data buses, enabling one instruction per clock cycle and deterministic interrupt latency. Key specifications of the PIC16F872-E/SP include a 4.0V to 5.5V supply voltage range, 16 I/O ports (per chipdig listing), 5 channels of 10-bit ADC, 22 I/O, integrated ICD (In-Circuit Debugger) support, and self-programming capability. The "E" suffix designates an industrial temperature grade of -40 to +125 C, while the "/SP" suffix indicates the 28-pin SPDIP package. The device is part of Microchip's PIC16F87x family and is pin-compatible with siblings such as the PIC16F871, PIC16F870, PIC16F873A, and PIC16F876A across the 28-pin footprint. Typical applications for the PIC16F872-E/SP include industrial control nodes, sensor interface boards, simple motor control loops using the CCP PWM, home appliance controllers, and educational/development boards where the integrated ICD eliminates the need for an external debugger. The device's 22 I/O and 5 ADC channels comfortably support multi-sensor data acquisition designs. When designing with this MCU, note that PIC16F872 has been superseded by the PIC16F882 (with nanoWatt technology and extended peripherals) but remains widely available through distribution as a long-life-cycle part. Pin-compatible migration to PIC16F873A or PIC16F876A adds more memory and PWM channels on the same 28-pin SPDIP footprint. This page synthesizes distributor pricing, drop-in pin-compatible alternatives (PIC16F871, PIC16F870, PIC16F873A, PIC16F882), and practical design notes not consolidated on the manufacturer product page alone.

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PIC16F872-E/SS - 8-Bit 20MHz 3.5KB Flash MCU | Microchip | SSOP-28
PIC16F872-E/SS

PIC16F872-E/SS - 8-Bit 20MHz 3.5KB Flash MCU | Microchip | SSOP-28

The Microchip Technology PIC16F872-E/SS is an 8-bit CMOS Flash microcontroller based on the PIC16 architecture, executing instructions in 200 ns at 20 MHz while consuming very little power. It integrates 3.5 KB (2K x 14) of Flash program memory, 128 bytes of SRAM, 64 bytes of EEPROM, and 22 general-purpose I/O pins in a 28-pin SSOP package. This -E (extended) variant operates across the full -40C to +125C industrial temperature range, making it suitable for harsh-environment embedded applications. A microcontroller (MCU) is a single-chip computer containing a CPU, memory, and programmable I/O peripherals. The PIC16F872 belongs to Microchip's mid-range PIC16 family, which sits in the hierarchy: microcontroller -> embedded processor -> semiconductor device. Within that family, the PIC16F872 is a peripheral-rich member offering 5 channels of 10-bit ADC, two additional timers, a Capture/Compare/PWM (CCP) module, and a Master Synchronous Serial Port (MSSP) configurable for SPI or I2C communication. The 35 single-word instruction RISC core simplifies code development while delivering deterministic real-time response. Key features include 5 channels of 10-bit analog-to-digital conversion for sensor interfacing, an MSSP supporting both 3-wire SPI and 2-wire I2C protocols, two 8-bit timers plus one 16-bit timer for flexible event capture, and 64 bytes of EEPROM for non-volatile data storage. In-circuit serial programming (ICSP) and in-circuit debugger (ICD) support allow firmware updates and debugging without removing the device from the PCB, accelerating prototyping and field service. Typical applications include industrial control systems, sensor signal conditioning front-ends, automotive body and chassis subsystems, low-cost motor control loops via the CCP/PWM channel, and battery-powered metering products that demand low quiescent current. The PIC16F872-E/SS is pin-compatible with several PIC16F87x siblings, enabling easy migration when additional memory or peripheral resources are required. When designing with this device, allocate four pins for in-circuit programming/debug (ICSPDAT/ICSPCLK plus VPP and VDD/GND) even if the debugger is not used in production. Choose a 20 MHz crystal only if the instruction-cycle budget truly requires it; a 4 MHz resonator typically satisfies most loop-control tasks while reducing EMI. This page synthesizes distributor pricing, drop-in pin-compatible alternatives, and practical design considerations not consolidated in the manufacturer datasheet - giving engineers a faster procurement and architecture decision path.

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PIC16F872-I/SO - 8-Bit 20MHz Flash MCU | Microchip Technology
PIC16F872-I/SO

PIC16F872-I/SO - 8-Bit 20MHz Flash MCU | Microchip Technology

The Microchip Technology PIC16F872-I/SO is an 8-bit CMOS flash microcontroller with a 20 MHz maximum clock, 3.5 KB of program Flash organized as 2K × 14 words, and 64 bytes of EEPROM data memory, housed in a 28-pin SOIC package. It combines a high-performance RISC CPU, 16 I/O pins, five 10-bit analog-to-digital converter channels, self-programming, and an ICD interface. A microcontroller is a programmable semiconductor that integrates a CPU, memory, and peripherals into one device. The PIC16F872 belongs to the PIC16 family of 8-bit RISC microcontrollers, combining the PIC architecture with flash memory, digital I/O, timers, and serial communication. This hierarchy places it among general-purpose embedded-control devices used to sense inputs, execute control logic, and drive outputs in compact electronic systems. The device uses 35 single-word instructions, with all instructions executing in one cycle except program branches, which require two cycles. Its 200 ns instruction-execution capability supports deterministic control at a 20 MHz operating speed. Five 10-bit ADC channels provide quantized analog measurements, while self-programming allows firmware updates without removing the microcontroller from its target circuit. Peripheral integration is a central advantage. Two additional timers support periodic timing, and the capture, compare, and PWM functions support event measurement or proportional output generation. The synchronous serial port can operate as either a three-wire SPI interface or a two-wire I²C bus, allowing the same controller to communicate with displays, sensors, memories, and other microcontrollers using selectable serial protocols. Typical applications include industrial control panels, compact sensor modules, environmental monitoring, appliance controllers, programmable timers, and small motor-control or LED-driving systems. The 16 available I/O lines allow the device to supervise switches, read analog sensors, communicate with a host, and operate outputs in applications where a larger MCU would add unnecessary cost or complexity. When laying out a circuit, place the oscillator, decoupling capacitor, programming interface, and reset components according to the manufacturer data sheet. Because the device has a 28-pin SOIC footprint, verify that a replacement uses the same 28-pin pinout, voltage range, memory organization, and peripheral assignments. The -I/SO ordering code identifies the industrial-temperature and SOIC package option, while programming and configuration settings must be reviewed before production use. This product overview combines the manufacturer core-feature information with package, memory, interface, and purchasing guidance. It also provides application-focused design notes, lifecycle information, comparison criteria, and verified source links to help engineers evaluate the PIC16F872-I/SO before integrating it into an embedded-control design.

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PIC16F872-I/SP - 20MHz 8-Bit Flash MCU | Microchip
PIC16F872-I/SP

PIC16F872-I/SP - 20MHz 8-Bit Flash MCU | Microchip

The Microchip Technology PIC16F872-I/SP is a 20 MHz, 8-bit CMOS flash microcontroller with 3.5 KB program memory, 128 bytes of SRAM, 64 bytes of EEPROM, and five 10-bit ADC channels in a 28-pin SPDIP package. It executes single-word instructions with a 200 ns cycle time and provides 22 I/O pins for embedded control applications. A microcontroller is a programmable semiconductor that integrates a processor core, program memory, data memory, and peripherals on one device. The PIC16F872 belongs to the PIC16 family of 8-bit RISC microcontrollers, combining a compact instruction set with flash program memory, EEPROM data storage, analog measurement, timers, serial communication, and PWM generation. This integration allows a design to replace many discrete logic, timing, interface, and analog-conversion components. Key features include 2,048 words of 14-bit flash program memory, 128 bytes of data RAM, 64 bytes of EEPROM, five 10-bit analog-to-digital conversion channels, and 22 I/O pins. Two additional timers support independent timing or event-counting duties, while capture, compare, and PWM functions generate precise digital timing signals. The synchronous serial port can operate as a three-wire SPI interface or a two-wire I²C interface. The PIC16F872 architecture uses 35 single-word instructions and supports 200 ns instruction execution. Its 13-bit program counter addresses an 8K-word program-memory space, while the implemented device uses 2K words of flash. Self-programming is supported, and the integrated ICD interface provides a dedicated connection for in-circuit programming and debugging. These resources make the device suitable for compact control systems requiring analog inputs, persistent configuration data, and serial peripherals without an external data converter. Typical applications include industrial control panels, environmental monitoring equipment, motor-speed controllers, keypad interfaces, LED and lighting controllers, small inverters, instrumentation front ends, and compact consumer appliances. Five ADC channels allow direct sensing of potentiometers, thermistors, and other analog transducers, while EEPROM retains calibration values and operating parameters across power cycles. When designing around the PIC16F872-I/SP, account for the 28-pin through-hole footprint, assign the oscillator and programming pins according to the manufacturer pinout, and provide suitable decoupling near VDD. The device's operating voltage, current limits, and detailed electrical characteristics should be taken directly from the Microchip data sheet before finalizing the power supply and PCB implementation. This page consolidates the device architecture, memory configuration, peripheral capabilities, package details, programming guidance, drop-in replacement considerations, and practical application guidance to support faster component selection and implementation planning.

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PIC16F872-I/SS - 20MHz 8-Bit Flash MCU | Microchip
PIC16F872-I/SS

PIC16F872-I/SS - 20MHz 8-Bit Flash MCU | Microchip

Microchip PIC16F872-I/SS is an 8-bit CMOS flash microcontroller with a 20 MHz operating speed, 3.5 KB of programmable flash memory organized as 2K x 14 words, and a 28-pin SSOP package. It combines a compact RISC-based architecture with 35 single-word instructions, 200 ns instruction execution, 64 bytes of EEPROM, and self-programming support. A microcontroller is a programmable semiconductor that integrates a processor core, memory, and peripherals into one device. The PIC16F872 belongs to the PIC16 family of 8-bit flash microcontrollers, placing it below more general-purpose 32-bit processors in computational capacity while offering dedicated resources for embedded control, sensor reading, timing, and serial communications. The -I/SS ordering identifies the industrial-temperature grade in an SSOP package. The device includes five 10-bit analog-to-digital converter channels, two additional timers, capture/compare/PWM functions, and a synchronous serial port configurable for three-wire SPI or two-wire I²C operation. Its 64-byte EEPROM provides nonvolatile storage for configuration and calibration values, while self-programming allows firmware to update retained program data under controlled conditions. The PIC architecture supports compact instruction encoding, and the listed 200 ns execution capability enables deterministic control of time-sensitive embedded tasks. Two additional timers support periodic scheduling, input capture, output compare, and pulse-width modulation. The five-channel ADC is suitable for monitoring multiple analog inputs, while selectable SPI or I²C operation allows the same controller to connect to different peripheral types. Typical uses include industrial control panels, temperature monitoring, small motor and actuator controllers, sensor interfaces, and compact embedded products. The combination of EEPROM, ADC channels, timers, and serial buses is particularly useful when a board needs local sensing and communication without relying on a separate programmable logic device or external data converter. For PCB design, follow the pin-assignment table and recommended decoupling arrangement in the Microchip data sheet. Preserve the required oscillator configuration, programming access, supply voltage limits, and unused-pin treatment in the production schematic. Firmware should also include startup and brownout handling appropriate to the final power-supply topology. This page organizes the PIC16F872-I/SS specifications, compatible family options, application guidance, and engineering considerations into a practical selection reference. The comparison focuses on package, memory, peripherals, and programming requirements so engineers can evaluate an upgrade path before changing a PCB or firmware design.

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PIC16F872T-I/SO - 8-Bit 20MHz 3.5KB FLASH MCU | Microchip
PIC16F872T-I/SO

PIC16F872T-I/SO - 8-Bit 20MHz 3.5KB FLASH MCU | Microchip

The Microchip Technology PIC16F872T-I/SO is a PIC® 16F family 8-bit CMOS FLASH microcontroller packaged in a 28-pin SOIC (SO) wide-body outline, executing 200 ns instructions at up to 20 MHz clock speed. The 'T' suffix indicates tape-and-reel packaging and the 'I' denotes the industrial temperature range (-40C to +85C). According to the verified Microchip product page and DigiKey listing, this device integrates 3.5 KB (2K x 14 words) of program FLASH, 128 bytes of RAM and 64 bytes of EEPROM data memory into a single 28-pin IC. An 8-bit microcontroller (MCU) is a small, self-contained computer-on-a-chip that combines a CPU, non-volatile program memory, volatile data memory, and programmable I/O peripherals on a single silicon die. The PIC16F872 belongs to Microchip's mid-range PIC16 enhanced family, sitting between the baseline PIC10/12/16 devices and the higher-end PIC18 family. It is designed for embedded control tasks where deterministic instruction execution, low power consumption, and small code footprint matter more than raw CPU throughput. Key features of the PIC16F872T-I/SO include 22 digital I/O pins, 5 channels of 10-bit ADC for analog sensing, nanoWatt technology power management, an ICD (In-Circuit Debugger) interface, and self-programming support. The 200 ns instruction cycle gives 5 MIPS throughput, while the 35 single-word instruction RISC architecture simplifies code generation and learning curves. The wide 4.0V to 5.5V supply range aligns with 5V system buses. The architecture is a Harvard-style 8-bit RISC core with separate program FLASH and data RAM buses, allowing simultaneous instruction fetch and data access. The 14-bit instruction word provides a compact opcode space suitable for the 35-instruction set, while 10-bit ADC resolution delivers 1024-step conversion accuracy adequate for sensor monitoring. nanoWatt Technology provides dynamic power reduction through sleep modes, oscillator switching, and selective peripheral shutdown. Typical applications include industrial sensor conditioning, white-goods and appliance controllers, automotive body and lighting subsystems, low-end HVAC thermostats, security keypad panels, and remote control / consumer electronics where the 5V-tolerant I/O and 10-bit ADC simplify analog front-end design. When designing with the PIC16F872, ensure the supply rail is decoupled with 100 nF ceramic capacitors close to VDD/SS pins, and reserve an MCLR pull-up network. Use the ICD interface for boundary-scan-free in-circuit programming, and verify ADC acquisition time against source impedance. The PIC16F872T-I/SO is pin-compatible with the PIC16F873/874 family in the same SOIC-28 footprint, enabling future upgrades without PCB rework.

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PIC16F872T-I/SS - 20MHz 8-Bit Flash MCU, 3.5KB | Microchip
PIC16F872T-I/SS

PIC16F872T-I/SS - 20MHz 8-Bit Flash MCU, 3.5KB | Microchip

The Microchip Technology PIC16F872T-I/SS is an 8-bit CMOS Flash-based PIC microcontroller delivering up to 20 MHz clock input with 200 ns instruction cycle, packaged in a 28-pin SSOP. It integrates 3.5 KB (2K x 14) of Flash program memory, 128 bytes of RAM, 64 bytes of EEPROM data memory, and 22 I/O pins. The device includes a 5-channel 10-bit ADC and supports self-programming with In-Circuit Debugging (ICD). A microcontroller (MCU) is a single-chip computer containing a CPU, memory, and programmable I/O peripherals. The PIC16F872 belongs to Microchip's PIC16F mid-range family, a category of 8-bit RISC microcontrollers known for low power consumption (nanoWatt technology), small code footprint, and deterministic interrupt response. Within the broader hierarchy, PIC16F872 sits as: 8-bit MCU -> parallel RISC controller -> parallel microcontroller -> parallel embedded controller -> parallel semiconductor. This category placement matters because 8-bit PIC MCUs dominate cost-sensitive, low-power embedded designs where compute headroom is secondary to determinism and energy efficiency. Key features include 35 single-word instructions (all single-cycle except program branches, which are two-cycle), an operating voltage range of 4.0 V to 5.5 V, and an industrial temperature range of -40C to +85C. The 28-SSOP package supports surface-mount assembly with standard JEDEC land patterns. The integrated nanoWatt technology provides multiple power-saving modes that reduce quiescent current during idle periods. Five channels of 10-bit ADC enable direct sensor interfacing without external converters, simplifying BOM in measurement and control applications. The PIC16F872 uses a Harvard-architecture RISC core with separate program and data buses, which lets the CPU fetch the next instruction while accessing data memory in the same cycle. Self-programming capability allows field firmware updates through the ICSP pins without external programming hardware, simplifying manufacturing and after-sale service workflows. The architecture is upwards compatible with PIC16C5X, PIC12CXXX, and PIC16C7X devices, easing migration from legacy Microchip designs. Typical applications include industrial sensor interfaces, motor control subsystems, low-cost consumer appliances, HVAC controllers, automotive body electronics (non-safety), and battery-powered instruments. The 22 I/O pins and ADC channels provide sufficient peripheral density for many mid-range embedded tasks. When designing with this device, ensure Vdd decoupling follows Microchip's reference layout: a 0.1 uF ceramic capacitor close to the Vdd pin plus a bulk tantalum or electrolytic cap on the supply rail. The MCLR pin must be pulled high through a resistor for normal operation. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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PIC16F873-04/SP - 8-Bit 4MHz MCU 7KB Flash 28-SPDIP | Microchip
PIC16F873-04/SP

PIC16F873-04/SP - 8-Bit 4MHz MCU 7KB Flash 28-SPDIP | Microchip

The Microchip Technology PIC16F873-04/SP is an 8-bit PIC16 family CMOS Flash microcontroller running up to 4 MHz, integrating 7KB of Flash program memory, 192 bytes of SRAM, and 128 bytes of EEPROM data memory in a 28-pin SPDIP (Skinny Plastic DIP) through-hole package. The "-04" speed grade specifies a 4 MHz maximum oscillator input, while "/SP" denotes the 28-pin SPDIP industrial-temperature package, making it a cost-optimized variant of the PIC16F873 family. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, working RAM, non-volatile data storage, and peripheral interfaces such as ADC, USART, I/O ports, timers, and capture/compare/PWM modules. The PIC16F873 belongs to Microchip's mid-range 14-bit instruction-word PIC architecture, sitting in the device hierarchy of 8-bit MCU -> PIC16 family -> PIC16F87x sub-family -> peripheral-rich general-purpose MCUs. Key features include five 10-bit Analog-to-Digital Converter (ADC) input channels (actually 8 channels on 28-pin variants), a USART/SCI serial port, MSSP for SPI and I2C, two 8-bit timers plus one 16-bit timer with Capture/Compare/PWM, a 14-bit wide instruction set, and 22 digital I/O pins. The device operates from 2.0 V to 5.5 V, supports ICD (In-Circuit Debugger) via two pins, and includes a watchdog timer with on-chip RC oscillator for reliable operation without external supervision. The architecture is built on Microchip's enhanced Harvard RISC design with separate program and data buses, enabling most instructions to execute in a single instruction cycle. On-chip Flash allows in-circuit serial programming (ICSP) for fast firmware iteration without UV erasure, a major advantage over the older EPROM-based PIC16C73 and PIC16C73A predecessors. Typical applications include industrial control systems, HVAC sensor interfaces, low-end data acquisition, appliance control, instrumentation front ends, and educational development platforms where the 28-pin DIP form factor simplifies breadboarding. The PIC16F873-04/SP is widely used as a teaching MCU because the DIP package fits standard 0.1" pitch breadboards and the 4 MHz speed grade provides ample headroom for instruction-cycle-based timing analysis. When designing with this part, note that the 4 MHz speed grade limits instruction execution to 1 MIPS; for higher throughput, consider the PIC16F873-20 (20 MHz / 5 MIPS) or PIC16F873A (up to 20 MHz with nanoWatt technology). Ensure that the configuration bits (oscillator selection, watchdog, brown-out, code protection) are set correctly during programming to avoid lock-out scenarios. This page synthesizes distributor stock data, drop-in alternatives across the PIC16F873 family, and practical ICD/ICSP design notes not consolidated in the manufacturer datasheet, giving engineers a single reference for sourcing, substitution, and bring-up.

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PIC16F873-04E/SO - 8-bit Flash MCU, 7KB, 22 I/O, SOIC-28 | Microchip
PIC16F873-04E/SO

PIC16F873-04E/SO - 8-bit Flash MCU, 7KB, 22 I/O, SOIC-28 | Microchip

The Microchip Technology PIC16F873-04E/SO is an 8-bit Flash microcontroller in the PIC16 family, integrating 7KB of Flash program memory (4K x 14 words), 192 bytes of RAM, and 22 digital I/O pins in a 28-pin SOIC (SO) wide-body package. The "-04" speed grade denotes a 4 MHz maximum oscillator input (200 ns instruction cycle), while the "E" suffix indicates the Extended (industrial) operating temperature range of -40C to +125C. The part operates from a single 4.0 V to 5.5 V supply and is built on Microchip's enhanced mid-range RISC architecture with 35 single-word instructions. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, data memory, and peripheral interfaces. The PIC16F87X family occupies the mid-range tier of Microchip's 8-bit PIC portfolio, sitting between the baseline PIC10/12/16 families and the high-performance PIC18 enhanced family. Flash-based MCUs like this one allow in-circuit re-programming, making them suitable for prototyping and field-upgradeable products. Within the system hierarchy, this part is classified as an 8-bit CISC-style RISC MCU in the embedded controller segment of the semiconductor market. Key features include a 10-bit Analog-to-Digital Converter (ADC) with up to 8 channels, a USART module for serial communication, an MSSP (Master Synchronous Serial Port) supporting SPI and I2C, two 8-bit timers plus one 16-bit timer, and a watchdog timer with its own on-chip RC oscillator. The nanoWatt Technology features deliver multiple power-managed modes including SLEEP, with typical sleep currents in the microamp range. Architecturally, the part uses a Harvard bus topology with separate program and data paths, allowing instruction fetch and data access to occur in the same cycle. The 14-bit instruction word packs more capability per opcode than 12-bit baseline parts, but the register set remains compatible with the broader PIC16 mid-range ecosystem for code portability. Brown-out Reset (BOR), Power-on Reset (POR), and the programmable code-protection bitstream are standard on-die features. Typical applications include industrial sensor nodes, white-goods control boards, low-cost motor controllers, smart meters, automotive body modules (with the -I or -04 extended variants), and standalone peripherals requiring serial bridge functionality. The wide SOIC-28 footprint simplifies hand-soldering and rework for prototype builds. Design consideration: when migrating between PIC16F873/874/876/877 variants, remember that this -04 part is rated at 4 MHz / 200 ns minimum instruction cycle; for 20 MHz operation, choose the -20 (PIC16F873-20) variant. The 28-pin SOIC package has a thermal resistance theta_JA of approximately 80 C/W which limits continuous dissipation - keep clock-stretched idle states short in thermally enclosed enclosures.

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PIC16F873-10E/SO - 8-bit 10MHz MCU, 7KB Flash, 28-SOIC | Microchip
PIC16F873-10E/SO

PIC16F873-10E/SO - 8-bit 10MHz MCU, 7KB Flash, 28-SOIC | Microchip

The Microchip PIC16F873-10E/SO is a 8-bit RISC flash microcontroller in a 28-pin SOIC (SO) wide-body package, delivering 10 MHz maximum operating frequency, 7 KB of flash program memory, 192 bytes of RAM, and 128 bytes of EEPROM with 22 digital I/O lines. It belongs to the PIC16F mid-range family and is specified for the -40C to +125C automotive/extended temperature grade, drawing from a 4 V to 5.5 V single supply. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (flash/ROM), data memory (RAM), and a rich set of peripherals such as timers, ADC, USART, and I/O ports on one die. Microcontrollers sit at the top of the embedded-control hierarchy - above discrete logic, below full microprocessors - and dominate applications where deterministic real-time response, low power, and small footprint matter. The PIC16F family specifically introduced nanoWatt technology for ultra-low-power sleep modes. Key features of the PIC16F873-10E/SO include 200 ns instruction execution, only 35 single-word instructions for easy C/assembly programming, 5 channels of 10-bit ADC, USART, MSSP (SPI/I2C), two 8-bit timers plus one 16-bit timer, and nanoWatt power management with < 1 uA sleep current. The enhanced '-10E' variant runs up to 10 MHz across the full 4.0-5.5 V supply range. Architecturally, the device uses a Harvard RISC core with separate program and data buses, 14-bit wide instruction word, and a hardware multiplier. The flash memory supports in-circuit serial programming (ICSP) via two pins, enabling firmware updates without removing the MCU from the board. Hardware brown-out reset, watchdog timer, and code protection are integrated. Typical applications include industrial control modules, automotive body and sensor subsystems, HVAC controllers, sensor interfaces, small appliances, and battery-powered instruments requiring extended temperature operation. The 28-SOIC wide-body footprint is footprint-compatible with the rest of the PIC16F87x 28-pin family, enabling PCB reuse. When designing with this part, verify the brown-out reset voltage threshold against the minimum supply (4.0 V) and budget for the 22 I/O pins which share analog/digital functions - the AN0-AN4 analog inputs multiplex with PORTA/PORTE bits. Always consult the Microchip PIC16F873/4/6/7 datasheet for the ICSP programming pinout and configuration-word settings. This page synthesizes distributor pricing, drop-in alternatives sourced from Microchip's own PIC16F family, and practical design notes not found in the standalone datasheet, giving engineers a single decision-ready reference.

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PIC16F873-20/SO - 8-bit 20MHz 7KB Flash MCU | Microchip | 28-SOIC
PIC16F873-20/SO

PIC16F873-20/SO - 8-bit 20MHz 7KB Flash MCU | Microchip | 28-SOIC

The Microchip Technology PIC16F873-20/SO is an 8-bit PIC16F-series CMOS Flash-based microcontroller in a 28-pin SOIC package, executing instructions at 200 ns per cycle from a 20 MHz external oscillator. It integrates 7 KB (4K x 14 words) of Flash program memory, 192 bytes of data RAM, and 128 bytes of EEPROM data memory, providing non-volatile storage for both program code and user data without external memory chips. A microcontroller (MCU) is a single-chip computer containing a CPU, RAM, non-volatile program memory, and peripheral interfaces; the PIC16F873 belongs to the PIC16F mid-range 8-bit family, one tier above baseline PIC10/12/16 devices and below enhanced PIC18F parts, optimized for cost-sensitive embedded control in industrial and consumer products. Key features include 22 general-purpose digital I/O pins, a five-channel 10-bit analog-to-digital converter (ADC), USART, SPI, and I2C (MSSP) serial peripherals, two 8-bit and one 16-bit timers, a Watchdog Timer with its own oscillator, and a 14-source interrupt controller with an eight-level hardware stack. The 28-SOIC package offers a footprint compatible with PIC16C73B/74B/76/77 and PIC16F873A/874A/876A/877A drop-in upgrades, enabling upward migration. The architecture uses a Harvard design with separate program and data buses, a RISC instruction set of only 35 single-word instructions, and direct/indirect/relative addressing modes. Power management features include Power-on Reset (POR), Power-up Timer (PWRT), Oscillator Start-up Timer (OST), and Brown-out Reset (BOR), ensuring deterministic startup under varying supply conditions. Typical applications include industrial control systems, sensor interface boards, motor control front-ends, automotive body electronics subsystems, and white-goods appliance controllers. The wide operating voltage range (typically 4.0-5.5V for the -20 speed grade) and industrial temperature range support harsh-environment deployments. Designers should note that Microchip recommends migrating new designs to the pin-compatible PIC16F873A-20/SO or PIC16F873-20I/SO (industrial temperature) variant, as the PIC16F873 is marked 'Not Recommended for new designs'. The MPLAB ICD and PICkit programmers support in-circuit debugging and Flash programming without external firmware. This page synthesizes distributor pricing, drop-in PIC16F-series alternatives, and practical design notes not consolidated in any single manufacturer datasheet, providing engineers with a one-stop reference for legacy PIC16F873 designs and modernization paths.

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PIC16F873A-E/ML - 8-Bit 20MHz MCU 7KB Flash 28-QFN | Microchip
PIC16F873A-E/ML

PIC16F873A-E/ML - 8-Bit 20MHz MCU 7KB Flash 28-QFN | Microchip

The Microchip Technology PIC16F873A-E/ML is an 8-bit CMOS flash-based RISC microcontroller delivering 20 MHz (200 ns instruction cycle) performance with 7 KB (4K x 14 words) of on-chip Flash program memory, packaged in a 28-pin QFN (6x6 mm) with thermal pad (also known as 28-VQFN or 28-QFN EP). It integrates 192 bytes of SRAM, 128 bytes of EEPROM data memory, and is rated for the Extended (-40C to +125C) automotive-style temperature grade designated by the "-E" suffix, while the "/ML" suffix confirms the QFN-28 (6x6) surface-mount land pattern. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory, working RAM, and configurable peripherals such as timers, ADCs, communication interfaces, and general-purpose I/O. The PIC16F873A belongs to Microchip's mid-range PIC16 family, sitting architecturally between the baseline PIC10/PIC12/PIC16 and the high-performance PIC18/PIC24 families. The device is fully upwards-compatible with the PIC16C5X, PIC12CXXX, and PIC16C7X lines, and shares its instruction set and pinout philosophy with the PIC16F874A/876A/877A siblings, allowing easy migration to larger-pin-count variants when more I/O is needed. Key features include 22 digital I/O pins, 5 channels of 10-bit ADC, 2 analog comparators, a synchronous serial port configurable as SPI or I2C, a USART for asynchronous serial, two 8-bit timers plus one 16-bit timer, nanoWatt power management, and In-Circuit Debug (ICD) plus self-programming capability. The PIC16F873A is a member of Microchip's "Enhanced Flash Microcontrollers" family featuring nanoWatt Technology for reduced quiescent current in sleep and idle modes. Typical applications include automotive body electronics and HVAC controls, industrial sensor interfacing, low-cost consumer appliance control, sensor signal conditioning with on-chip ADC, and battery-powered remote nodes that benefit from nanoWatt sleep modes. The wide operating voltage range of 4.0 V to 5.5 V and robust 20 MHz throughput suit 5V-system designs. When designing with the PIC16F873A-E/ML, ensure a solid thermal pad solder connection to a copper pour (typically 1 sq. inch minimum) for heat spreading, since the exposed pad (EP) is the primary thermal path. Decoupling: place a 100 nF ceramic capacitor within 5 mm of each VDD/VSS pair and a bulk 10 uF near the supply pin.

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PIC16F873A-E/SP - 8-bit 20MHz PIC MCU 7KB Flash 28-PDIP | Microchip
PIC16F873A-E/SP

PIC16F873A-E/SP - 8-bit 20MHz PIC MCU 7KB Flash 28-PDIP | Microchip

The Microchip Technology PIC16F873A-E/SP is an 8-bit CMOS enhanced Flash-based microcontroller (MCU) with 7KB Flash program memory, 192 bytes of RAM, and 128 bytes of EEPROM, packaged in a 28-pin SPDIP (300 mil) tube format. Operating from 4.0V to 5.5V with a 20 MHz maximum clock, the device delivers 200 ns instruction execution through Microchip's RISC PIC16 architecture with only 35 single-word instructions. The PIC16F873A-E/SP is the industrial operating-temperature grade (-40C to +125C) variant, distinguished by the 'E' and 'SP' suffixes. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, memory, and peripherals around an 8-bit data path. The PIC16F873A belongs to the mid-range PIC16F family, sitting between the baseline PIC10/12/14 families and the enhanced PIC18 family. Within the broader taxonomy, MCUs are classified as microcontrollers (sub-class of microprocessors) within semiconductors, used for embedded control applications where deterministic real-time response matters more than raw compute throughput. The PIC16F873A is widely deployed in cost-sensitive industrial, consumer, and automotive subsystems. Key features include 22 I/O pins, five channels of 10-bit Analog-to-Digital (A/D) conversion, two analog comparators, a synchronous serial port configurable as SPI or I2C, a USART for asynchronous serial communication, 128 bytes of EEPROM data memory, and self-programming capability with In-Circuit Debugging (ICD). The nanoWatt Technology power-management suite offers multiple oscillator options and idle/sleep modes for low-power designs. These peripherals enable direct interface to sensors, displays, EEPROMs, and RS-232/RS-485 transceivers without external glue logic. The PIC16F873A uses a Harvard RISC architecture with separate program and data buses, allowing instruction fetch and execution in a single cycle (except branches). The 14-bit instruction word and 8-bit data path provide a favorable code density vs 8-bit CISC alternatives. The 10-bit ADC uses a successive approximation register with selectable reference voltages, while the MSSP module supports both SPI master/slave and I2C master/slave modes. The USART supports asynchronous, synchronous master, and synchronous slave modes with hardware address detection. Typical applications include industrial sensor interfaces, HVAC control boards, motor control auxiliary logic, automotive body electronics, security panel keypads, and consumer appliance control. The 28-PDIP through-hole package supports hand-prototyping and easy firmware iteration; surface-mount variants in SOIC, SSOP, QFN, and MLF packages share the same die. Design consideration: confirm oscillator stability by placing the crystal or resonator within 1 cm of the OSC1/CLK2 and OSC2/CLK pins, with the load capacitors grounded to the device's VSS pin to avoid ground-loop noise. Also reserve the MCLR pin with a 10 kohm pull-up to VDD and a 100 nF decoupling capacitor for reliable reset behavior. This page synthesizes distributor pricing tiers, same-brand drop-in alternatives, and practical design considerations not aggregated in a single manufacturer datasheet, giving engineers a faster path to qualification.

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PIC16F873A-E/SS - 8-bit PIC MCU, 7KB Flash, 20MHz | Microchip
PIC16F873A-E/SS

PIC16F873A-E/SS - 8-bit PIC MCU, 7KB Flash, 20MHz | Microchip

The Microchip Technology PIC16F873A-E/SS is an 8-bit PIC RISC flash microcontroller with 7KB (4K x 14) program memory, 192 bytes of RAM, and 128 bytes of EEPROM, packaged in a 28-pin SSOP (Shrink Small Outline Package) with extended industrial temperature range support. Operating from 4V to 5.5V with a 20MHz clock, it executes one instruction every 200 ns across 35 single-word instructions, achieving powerful deterministic performance in a small footprint. An 8-bit PIC microcontroller (MCU) is a compact, RISC-based single-chip computer integrating a CPU, non-volatile flash memory, RAM, EEPROM, and peripherals such as ADC, comparators, and serial interfaces into a single IC. PIC MCUs sit within the broader hierarchy: 8-bit microcontroller -> microcontroller unit -> embedded controller -> semiconductor IC. Their deterministic instruction timing, low power consumption, and self-programmability make them widely used in industrial control, sensor interfaces, and consumer appliances. Key features of the PIC16F873A-E/SS include 5 channels of 10-bit Analog-to-Digital conversion (A/D), 2 analog comparators, a synchronous serial port configurable as 3-wire SPI or 2-wire I2C, a USART for asynchronous serial communication, and 22 digital I/O pins. The nanoWatt Technology power management offers multiple idle and sleep modes, and in-circuit serial programming (ICSP) plus in-circuit debugger (ICD) interfaces simplify firmware development and field updates. Self-programmability allows bootloaders and on-the-fly firmware upgrades. Architecturally, the PIC16F873A uses a Harvard-style architecture with separate program and data buses, enabling simultaneous instruction fetch and data access. The 14-bit wide instruction word supports direct, indirect, and relative addressing with hardware multiply assist, balancing code density against throughput. Brown-out reset (BOR), power-on reset (POR), and a watchdog timer with on-chip RC oscillator enhance field reliability without external components. Typical applications include industrial sensor interfaces, HVAC control modules, low-cost motor control, battery-powered instrumentation, and educational/development platforms. The wide operating temperature range and robust peripheral set also suit automotive body and chassis subsystems. When designing with this device, allocate adequate VDD decoupling (100nF plus 10uF bulk) within 5mm of the supply pins, and follow Microchip's recommended oscillator layout to avoid start-up failures. The 28-pin SSOP footprint is pin-compatible with several PIC16F family members, enabling easy migration when memory or peripheral needs change. This page synthesizes distributor stock data, drop-in cross-package alternatives within the same family, and practical design notes compiled from Microchip application briefs and datasheet typical-application circuits to help engineers select, source, and implement this MCU efficiently.

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PIC16F873A-I/ML - 8-Bit 20MHz 7KB Flash MCU | Microchip 28-QFN
PIC16F873A-I/ML

PIC16F873A-I/ML - 8-Bit 20MHz 7KB Flash MCU | Microchip 28-QFN

The Microchip PIC16F873A-I/ML is an 8-bit PIC16 family microcontroller based on a RISC architecture with 35 single-word instructions, delivering up to 20 MHz (200 ns instruction cycle) and packaged in a 28-pin QFN (ML, 6x6 mm) with industrial temperature range (-40C to +85C). It integrates 7KB of Flash program memory, 192 bytes of RAM, and 128 bytes of EEPROM data memory, while providing 22 digital I/O pins, two 8-bit and one 16-bit timers, and two Capture/Compare/PWM (CCP) modules. The device includes a 10-bit, 5-channel Analog-to-Digital Converter (ADC), two analog comparators, and a USART, plus a Synchronous Serial Port configurable as either 3-wire SPI or 2-wire I2C. A microcontroller (MCU) is a single-chip computer containing a CPU core, program and data memory, I/O peripherals, and often communication interfaces. The PIC16 family belongs to Microchip's mid-range 8-bit portfolio, positioned between the baseline PIC10/12/16 families and the higher-performance PIC18/dsPIC families, serving cost-sensitive embedded applications that require low power, deterministic interrupt response, and small code footprint. Key differentiators of the PIC16F873A include self-programmability (Flash In-Circuit Serial Programming, ICSP), In-Circuit Debugger (ICD) support for hardware breakpoints, nanoWatt technology for power management with multiple idle/sleep modes, and a wide 2.0V to 5.5V operating voltage range enabling both 3.3V and 5V systems. The 10-bit ADC supports 5 channels for direct sensor interfacing without external mux ICs. The architecture uses a 14-bit instruction word with separate 8-bit data path, a hardware multiplier option, and Harvard bus structure for deterministic timing. ICSP and ICD allow code updates and live debugging without removing the MCU from the PCB, reducing NRE cost for prototypes and field upgrades. Typical applications include industrial sensor signal conditioning, low-cost motor control (fans, small BLDC), consumer appliance user interfaces, and battery-powered measurement instruments such as thermometers and data loggers. The QFN-28 footprint makes it suitable for compact PCBs where SOIC alternatives would consume excessive board area. Designers should provide adequate decoupling (0.1uF ceramic plus 10uF bulk) on VDD, route MCLR through a 10k pull-up for ICSP, and use the nanoWatt sleep modes for battery duty-cycled designs to extend runtime. The 6x6 mm QFN pad requires a thermal via array to the inner ground plane for proper heat spreading during high-MIPS operation. This page consolidates distributor pricing, verified drop-in alternatives from the same PIC16F87xA family, and practical design notes not found in the manufacturer datasheet alone.

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PIC16F873A-I/SO - 8-bit MCU, 7KB Flash, 20MHz, 28-SOIC | Microchip
PIC16F873A-I/SO

PIC16F873A-I/SO - 8-bit MCU, 7KB Flash, 20MHz, 28-SOIC | Microchip

The Microchip Technology PIC16F873A-I/SO is an 8-bit CMOS enhanced Flash-based microcontroller in a 28-SOIC package with 7KB (4K x 14) program memory, 192 bytes of RAM, and 128 bytes of EEPROM data memory. It executes a 35-instruction RISC word set at up to 20MHz (200 ns instruction cycle) and exposes 22 digital I/O pins across two 8-bit ports (PORTB, PORTC) plus a 6-bit PORTA. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory (Flash/ROM), volatile data memory (RAM), and a configurable set of peripheral blocks (timers, ADC, communication ports, comparators). The PIC16F873A belongs to the mid-range PIC16 family, sitting in the hierarchy 8-bit MCU -> RISC MCU -> microcontroller -> embedded computing -> semiconductor. This category is the workhorse of industrial control, appliance, automotive aftermarket, and legacy consumer electronics because it balances deterministic timing, low power, and low unit cost. Key features include 5 channels of 10-bit Analog-to-Digital conversion, two analog comparators, three timers (Timer0, Timer1, Timer2), a synchronous serial port configurable as SPI or I2C, a USART for asynchronous serial, 10-bit PWM, in-circuit serial programming (ICSP), and self-programming support. The device operates across 2.0V to 5.5V, drawing typically < 2 mA at 5V/4MHz and < 1 uA in standby. The industrial -40C to +85C operating range suits factory-floor and outdoor enclosures. The architecture uses a Harvard RISC core with separate program and data buses, eliminating the von Neumann fetch bottleneck. The 14-bit wide instruction word compresses arithmetic-heavy code into small Flash footprints. Hardware multiply is not present, but the deterministic instruction timing and interrupt structure make real-time control loops straightforward. Typical applications include HVAC fan/valve controllers, washing-machine motor boards, sensor signal conditioning with on-chip ADC, low-cost inverter control loops, RS-485 Modbus slave nodes, and automotive aftermarket gauge clusters. Two analog comparators plus 5-channel ADC allow direct interface to thermistors, current shunts, and rotary encoders. When designing with this part, budget one or two I/O pins for ICSP (PGC/PGD) and reserve the MCLR pin for a proper reset network. Watch the 22 I/O budget against your peripheral count early; if a 40-pin variant is likely needed, step up to PIC16F874A/PIC16F876A/PIC16F877A in the same family before committing layouts. This page synthesizes distributor pricing, parametric drop-in alternatives, and application guidance not consolidated on the manufacturer product page.

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PIC16F873A-I/SS - 8-bit 20MHz 7KB Flash MCU | Microchip
PIC16F873A-I/SS

PIC16F873A-I/SS - 8-bit 20MHz 7KB Flash MCU | Microchip

The Microchip PIC16F873A-I/SS is an 8-bit CMOS Flash-based mid-range microcontroller executing instructions in 200 ns at 20 MHz, packaged in a 28-pin SSOP and offering 7 KB (4K x 14) of Flash program memory. It integrates 192 bytes of SRAM, 128 bytes of EEPROM, 22 digital I/O pins, a 5-channel 10-bit Analog-to-Digital converter, two analog comparators, one 8-bit and one 16-bit timer, and a configurable synchronous serial port that operates as either SPI or I2C, plus a USART. An 8-bit microcontroller is a single-chip computer built around an 8-bit data path, RISC CPU, integrated memory, and peripherals, designed to control embedded systems. The PIC16F873A belongs to Microchip's PIC16 mid-range family, which sits in the broader taxonomy: 8-bit MCU -> microcontroller -> embedded computing -> semiconductor. The mid-range line uses a 14-bit instruction word, providing a balance of code density, deterministic interrupt latency, and peripheral integration for cost-sensitive control applications. Key features include nanoWatt technology for low-power operation with multiple power-managed modes (RUN, IDLE, SLEEP), self-programming Flash support, in-circuit debugging (ICD), and a wide 2.0V to 5.5V supply range. The 200 ns instruction cycle delivers 5 MIPS of throughput, adequate for sensor sampling, motor control loops, and user-interface handling. The 5-channel 10-bit ADC enables direct interface to analog sensors such as temperature, light, and battery monitors without external ADC hardware. The PIC16F873A uses a Harvard architecture with separate program and data buses, allowing instruction fetch and operand access in a single cycle. The enhanced Flash cell supports 100,000 erase/write cycles typical and 40 years of data retention, with self-programming that enables field firmware updates via bootloader or UART/SPI. Brown-out Reset, Power-on Reset, and a Watchdog Timer with its own on-chip oscillator provide fault resilience, while the nanoWatt modes cut supply current into the microamp range for battery-powered duty-cycled designs. Typical applications include industrial sensor nodes and instrumentation, automotive body and accessory electronics (with the PIC16F873A-I/SS operating across the industrial -40C to +85C range), consumer appliance controllers, HVAC control boards, low-end display drivers, and any cost-driven 8-bit embedded task that fits within 7 KB of Flash. Designers also commonly pair it with external EEPROM, real-time clocks, and discrete serial-interface peripherals. When designing with this MCU, ensure that the ICSP clock and data lines (RB6/RB7) are isolated from circuitry that could load them during programming, and place the decoupling capacitor as close to VDD as the routing allows. Note that Microchip recommends the newer PIC16F18854 for new designs; the PIC16F873A-I/SS remains in production primarily for service and legacy compatibility. This page synthesizes distributor pricing, drop-in same-package alternatives, design notes, and a parameter comparison table not consolidated in the manufacturer datasheet, giving procurement and design engineers a single reference for sourcing and qualifying replacements.

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PIC16F873AT-E/ML - 8-Bit MCU, 20MHz, 7KB Flash, 28-QFN | Microchip
PIC16F873AT-E/ML

PIC16F873AT-E/ML - 8-Bit MCU, 20MHz, 7KB Flash, 28-QFN | Microchip

The Microchip Technology PIC16F873AT-E/ML is an 8-bit PIC16 microcontroller built on the PIC® RISC architecture, operating at up to 20MHz with 7KB (4K x 14 words) of FLASH program memory, 192 bytes of SRAM, and 128 bytes of EEPROM. Housed in a 28-pin QFN (6x6 mm) package with exposed thermal pad, this device delivers 22 digital I/O pins and integrates I2C, SPI, and UART/USART connectivity peripherals for embedded control applications. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, data memory, and peripheral interfaces on one silicon die. Within the broader taxonomy, MCUs sit inside the integrated circuits family, alongside memory ICs and logic ICs, and they form the lowest-level decision-making nodes in embedded systems ranging from consumer appliances to industrial controllers. The PIC16 mid-range family, introduced by Microchip, uses a Harvard architecture with separate program and data buses, enabling single-cycle instruction fetch and predictable deterministic timing. The PIC16F873A specifically targets applications needing moderate memory, on-chip EEPROM for parameter storage, and the standard set of serial communication peripherals. Key features of the PIC16F873AT-E/ML include a 20MHz maximum clock (200ns instruction cycle), 14-bit instruction word, 8-level hardware stack, 5 channels of 10-bit ADC, two 8-bit timers plus one 16-bit timer, a capture/compare/PWM module, and the standard PIC16F mid-range peripheral set. The extended (E) temperature grade and tape-and-reel (T) packaging designation indicate this variant is rated for -40C to +125C operation and supplied on reel for high-volume SMT assembly lines. Architecturally, the PIC16F873A uses Microchip's enhanced mid-range 14-bit core with hardware multiplier support, 35 single-word instructions, and up to 8K x 14 words of linear program memory addressing. In-system programming via ICSP allows firmware updates after PCB assembly, while the integrated brown-out reset and watchdog timer increase robustness in unattended industrial installations. Typical applications include industrial automation sensors, motor control driver boards, HVAC thermostats, automotive body electronics subsystems, and consumer white-goods user interfaces. The combination of on-chip EEPROM, ADC, and three serial interfaces supports complete subsystem designs without external peripheral ICs. When designing with this part, allocate the 28-QFN exposed pad to a continuous ground plane for thermal relief and consider the PICkit 5 or ICD 4 programmer for in-circuit debugging. The 192-byte SRAM limits complex protocol stacks, so plan for application code that uses stack-efficient algorithms. This page synthesizes distributor pricing, drop-in same-package alternatives from the PIC16 family, and practical design notes not collated in the manufacturer datasheet alone.

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PIC16F873AT-I/SO - 8-Bit 20MHz MCU 7KB Flash 28-SOIC | Microchip
PIC16F873AT-I/SO

PIC16F873AT-I/SO - 8-Bit 20MHz MCU 7KB Flash 28-SOIC | Microchip

The Microchip Technology PIC16F873AT-I/SO is a member of the PIC16F87x mid-range 8-bit CMOS Flash microcontroller family, featuring 7KB (4K x 14 words) of on-chip Flash program memory, 192 bytes of SRAM, and 128 bytes of EEPROM data memory, all integrated into a 28-pin SOIC (SO) package with industrial temperature range (-40C to +85C). The part executes instructions at 200 ns per cycle from a 20 MHz oscillator, supports 35 single-word instructions, and provides 22 digital I/O pins plus a rich peripheral set including a 10-bit Analog-to-Digital Converter, two analog comparators, a USART, an MSSP module (SPI / I2C), and three timers (Timer0, Timer1, Timer2). A PIC (Peripheral Interface Controller) microcontroller is a Harvard-architecture RISC device designed for deterministic, low-power embedded control. PIC16 mid-range parts sit between the baseline PIC10/12/16 families and the enhanced PIC18 family, balancing low cost with a broad peripheral mix. The PIC16F873A specifically is one of the original 28/40/44-pin enhanced flash MCUs introduced by Microchip and remains a long-life product for industrial and consumer designs. Key features include an ICD (In-Circuit Debug) capability, self-programming Flash, a 10-bit ADC with up to five input channels (28-pin package variant), hardware USART for asynchronous serial, and two analog comparators with programmable reference. The device operates from 2.0 V to 5.5 V, allowing both 3.3 V and 5 V system designs. In-circuit serial programming (ICSP) is supported via RB6/RB7, allowing firmware updates without removing the part from the board. The PIC16F873A's architecture uses a 14-bit instruction word and an 8-bit data path, with separate program and data buses for deterministic interrupt latency. The 7 KB Flash can be re-written up to 100,000 times per the manufacturer endurance spec. Internal oscillator calibration and a wide analog feature set make it popular for sensor-interface and human-interface designs. Typical applications include industrial sensor signal conditioning, HVAC thermostat controllers, battery chargers, motor-driver front-ends, security-system keypads, and small appliance controls. The 28-pin SOIC footprint is convenient for hand-solderable through-hole-replacement designs and dense surface-mount boards alike. When designing with this MCU, ensure decoupling capacitors (100 nF) are placed within 5 mm of each power pin, and reserve RB6/RB7 for ICSP to preserve in-field firmware update capability. The 'A' revision adds brown-out-reset, oscillator-startup-timer, and power-on-timer improvements over the legacy PIC16F873. This page synthesizes distributor pricing, drop-in same-family alternatives, datasheet pinout, and practical design notes not found in the manufacturer datasheet alone.

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