Mikrocontroller

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PIC16F84-10/SO - 8-Bit 10MHz Flash MCU 1.75KB | Microchip
PIC16F84-10/SO

PIC16F84-10/SO - 8-Bit 10MHz Flash MCU 1.75KB | Microchip

The Microchip Technology PIC16F84-10/SO is an 8-bit RISC flash microcontroller running up to 10MHz with 1.75KB (1K x 14 words) of on-chip program Flash and 68 bytes of RAM, housed in a 18-pin SOIC wide-body (SO) package. It is a member of the well-known PIC16F8x family and integrates 64 bytes of EEPROM data memory, a 13-bit instruction word, and a wide 2.0V to 6.0V operating range. What is a flash microcontroller? A flash microcontroller is a single-chip computer that integrates a CPU, non-volatile program memory (Flash), working RAM, EEPROM data storage, and programmable I/O on one silicon die. The PIC16F84 belongs to the mid-range PIC16 family, which sits between the baseline PIC10/12/16 MCUs and the enhanced PIC18 family. Within the broader taxonomy it is a microcontroller -> embedded controller -> CMOS RISC microprocessor -> semiconductor IC. The 14-bit instruction width and 35 single-word instruction set keep code density high while keeping the core footprint small. Key features of the PIC16F84-10/SO include 10MHz maximum clock (200ns instruction cycle), 1.75KB Flash program memory, 68 bytes data RAM, 64 bytes EEPROM, 13 I/O pins with individually programmable direction, a watchdog timer with on-chip RC oscillator, power-on reset, power-saving SLEEP mode, in-circuit serial programming (ICSP) via RB6/RB7, and code protection bits. The CMOS fully-static design lets the clock be stopped without losing register state, which is valuable for low-power standby. Architecturally the device uses a Harvard-style memory map with separate program Flash and data RAM address spaces and a single accumulator-based ALU. The 8-level deep hardware stack limits nested call depth, but the RISC pipeline delivers deterministic single-cycle execution for most instructions. Compared with older EPROM PIC16C84 designs, the PIC16F84 replaces the quartz-window UV-erase EPROM with in-circuit re-programmable Flash, removing the need for an eraser. Typical applications include hobbyist and educational projects (the canonical 'hello world' PIC), low-volume embedded controllers, simple sensor interfaces, replacement of legacy 8051/68HC05 designs, LED driving and key-scan matrices, and timer/scheduler modules in larger systems. The 18-pin SOIC footprint makes it friendly to breadboards and hand-soldered prototypes. According to Microchip, the recommended successor for new designs is the PIC16F84A, which adds internal oscillator options and improved Flash endurance. When designing with this part, note that newer 16F84A silicon is the preferred long-life replacement; legacy 16F84 designs should still be treated as active but EOL-leaning. A 4MHz to 10MHz crystal or ceramic resonator on OSC1/OSC2 is the typical clock source, and decoupling of 100nF plus 10uF bulk should be placed within a few millimeters of VDD/VSS. The ICSP pins (RB6/RB7) double as general I/O, so series resistors are sometimes required to isolate the programmer from the rest of the board. This page synthesizes distributor pricing, drop-in compatible alternatives from the PIC16F8x family, application guidance, and design notes that go beyond the manufacturer datasheet, helping both new users and sourcing engineers make an informed decision.

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PIC16F84-10I/P - 8-bit Flash MCU, 10MHz, 1.75KB | Microchip
PIC16F84-10I/P

PIC16F84-10I/P - 8-bit Flash MCU, 10MHz, 1.75KB | Microchip

The Microchip PIC16F84-10I/P is an 8-bit CMOS flash microcontroller from the PIC16CXX family, delivering 10 MIPS performance from a 10 MHz clock input in an 18-pin PDIP through-hole package. It integrates 1.75 KB of flash program memory, 68 bytes of RAM, 64 bytes of EEPROM data memory, and 13 general-purpose I/O pins, all in a fully-static RISC design with 35 single-word instructions. An 8-bit microcontroller (MCU) is a small computer-on-a-chip that integrates a CPU, memory, and I/O peripherals into a single device, optimized for embedded control tasks. Within the broader taxonomy, the PIC16F84 sits in the hierarchy: 8-bit microcontroller -> flash microcontroller -> RISC microcontroller -> embedded controller -> semiconductor. It executes one instruction per instruction cycle (400 ns at 10 MHz), which is more deterministic than accumulator-based CISC architectures and is well suited to deterministic real-time control. Key features of the PIC16F84-10I/P include a wide 4.0 V to 5.5 V operating range, industrial-grade -40 °C to +85 °C temperature range, an internal 4 MHz RC oscillator (with external oscillator options), a 15-bit program counter, eight-level hardware stack, and a watchdog timer with on-chip RC oscillator for autonomous recovery. The device supports in-circuit serial programming (ICSP) for field updates and includes code protection to safeguard firmware IP. The PIC16F84-10I/P uses a Harvard architecture that separates program and data buses, allowing instruction fetch and data access to occur in the same cycle. This separation delivers higher throughput than von Neumann designs at the same clock rate and is the foundation of the PIC family's deterministic interrupt latency. Typical applications include hobbyist and educational projects, simple sensor interfaces, low-cost consumer appliances, and legacy industrial control retrofits. The 18-pin PDIP form factor remains popular for breadboarding and through-hole assembly, while the PIC16F84A is the recommended migration path for new designs. When designing with the PIC16F84-10I/P, ensure MCLR is pulled high through a 10 kohm resistor and that VDD is bypassed with a 100 nF ceramic capacitor placed within 5 mm of the supply pin. For designs requiring more memory or peripherals, migrate to PIC16F84A-04/P or PIC16F628A, both pin-compatible in PDIP-18. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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PIC16F84-10I/SO - 8-Bit 10MHz 1.75KB Flash MCU | Microchip
PIC16F84-10I/SO

PIC16F84-10I/SO - 8-Bit 10MHz 1.75KB Flash MCU | Microchip

The Microchip Technology PIC16F84-10I/SO is an 8-bit RISC Flash/EEPROM microcontroller based on the PIC16 CPU core, operating at a maximum clock frequency of 10 MHz with a 400 ns instruction cycle, housed in an 18-pin SOIC (SO) package. Key headline specifications include 1.75 KB (1K x 14) of self-programmable Flash program memory, 68 bytes of data RAM, 64 bytes of EEPROM data memory, and 13 general-purpose digital I/O pins. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash/ROM), working RAM, and configurable I/O peripherals. The PIC16 family belongs to Microchip's 8-bit PIC architecture, which sits within the broader category of microcontrollers (MCU) -> 8-bit microcontrollers -> RISC microcontrollers -> embedded controllers -> semiconductors. Within a system hierarchy, an MCU sits between sensors/actuators (at the edge) and a host processor or communication bus (upstream), executing deterministic real-time tasks such as motor timing, keypad scanning, and protocol conversion. The PIC16F84-10I/SO features 35 single-word instructions, single-cycle execution except for program branches (which take two cycles), and a 14-bit wide instruction word. It includes a programmable code-protection mechanism, an 8-bit timer/counter (TMR0) with an 8-bit programmable prescaler, a watchdog timer (WDT) with its own on-chip RC oscillator, and power-saving sleep mode. The device operates across 2.0V to 6.0V and supports in-circuit serial programming (ICSP) through two pins (RB6, RB7). The architecture implements a Harvard-style memory layout with separate program and data buses, which allows instruction fetch and operand read to occur in the same cycle. CMOS technology keeps quiescent current low (typically <1 µA in sleep), making the part attractive for battery-backed and energy-conscious designs. The 'I' suffix denotes the industrial operating temperature grade of -40 °C to +85 °C. Typical applications include low-cost embedded control nodes, hobby and educational microcontroller projects, sensor signal conditioning front-ends, LED driving and lighting controllers, appliance user-interface panels, and battery chargers. The 13 GPIO and the 64-byte EEPROM are particularly useful when a small, persistent calibration table or runtime counter must survive power cycles without an external EEPROM chip. Designers should note that the original PIC16F84 has been superseded by the PIC16F84A, which is recommended for all new designs; however, the PIC16F84-10I/SO remains in distribution and is commonly used for maintenance of legacy assemblies. The wide 2.0V–6.0V supply range also lets it run directly from a 4.5V battery or a regulated 5V rail. This page consolidates distributor pricing, 18-pin SOIC drop-in alternatives (notably PIC16F84A-20I/SO and PIC16F84-10/SO), and design notes that are not bundled on the manufacturer datasheet front page, helping engineers evaluate legacy replacement and supply options in a single view.

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PIC16F84A-04/P - 4MHz 8-Bit Flash Microcontroller | Microchip
PIC16F84A-04/P

PIC16F84A-04/P - 4MHz 8-Bit Flash Microcontroller | Microchip

The Microchip Technology PIC16F84A-04/P is an 8-bit CMOS Flash and EEPROM microcontroller rated for operation up to 4 MHz and packaged in an 18-pin PDIP. It provides 1024 words of program Flash memory, 68 bytes of data RAM, and 64 bytes of EEPROM memory, while exposing 16 general-purpose I/O pins. Its architecture uses 35 single-word instructions with a 200 ns instruction execution time, making it suitable for compact embedded control, measurement, and legacy PIC peripheral designs. An 8-bit microcontroller is a programmable semiconductor that executes a fixed-width instruction set and reads inputs, processes data, and controls outputs through embedded firmware. Within the Microchip product hierarchy, the PIC16F84A belongs to the PIC16 family of 8-bit RISC microcontrollers, combining general-purpose digital control with Flash program memory and EEPROM data retention. This combination allows field reprogramming without removable nonvolatile memory. The PIC16F84A-04/P provides 1.75 KB of Flash program memory, equivalent to 1024 14-bit program words. Its 68 bytes of data RAM support working variables, while 64 bytes of EEPROM retain configuration or operating parameters when the device loses its supply. The 16 I/O pins can be assigned to digital inputs and outputs, with several port pins also supporting peripheral or interrupt functions described by the manufacturer datasheet. The reduced 4 MHz speed grade provides a practical balance between processing performance and clock-related requirements for established PIC16 designs. At this speed, the device retains a compact instruction architecture with 200 ns execution time and a simple set of 35 single-word instructions. This makes the PIC16F84A-04/P appropriate for educational instruments, simple sequencers, appliance controls, programmable logic, and legacy products that depend on the established PIC16F84A pin arrangement. Typical uses include digital control panels, simple motor sequencers, laboratory demonstrators, temperature-monitoring controllers, and compact embedded products that need nonvolatile configuration storage. Because the device is supplied in an 18-pin PDIP package, it is particularly suitable for through-hole prototyping, educational kits, and legacy repair work where a surface-mount package would complicate assembly. When replacing an existing PIC16F84A design, check the clock configuration, reset behavior, EEPROM usage, and interrupt requirements before changing the device. The -04 suffix denotes the 4 MHz speed grade, while /P denotes the PDIP package. Use the manufacturer pin-description table and programming specification to preserve the board-level pin mapping and confirm timing assumptions. This page combines the manufacturer datasheet, package and memory details, programming guidance, and verified cross-reference results into an engineering-focused overview for designers maintaining or creating PIC16F84A-based products.

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PIC16F84A-04/SS - 4MHz 8-bit Flash MCU, 1.75KB | Microchip
PIC16F84A-04/SS

PIC16F84A-04/SS - 4MHz 8-bit Flash MCU, 1.75KB | Microchip

The Microchip PIC16F84A-04/SS is a CMOS Flash/EEPROM-based 8-bit microcontroller in the PIC16F family, delivering up to 4 MHz clock input (200 ns instruction cycle) in a 20-pin SSOP package. It integrates 1.75 KB (1K x 14) of Flash program memory, 68 bytes of SRAM data memory, 64 bytes of EEPROM data memory, and 13 digital I/O pins arranged across ports A and B, with one 8-bit timer (Timer0) and one 16-bit timer/counter (Timer1). An 8-bit microcontroller (MCU) is a small, self-contained computing device built around an 8-bit data path, typically integrating a CPU core, RAM, non-volatile program memory (Flash/ROM/EEPROM), I/O peripherals, and timers on a single die. Within the broader taxonomy, the PIC16F84A belongs to the 8-bit MCU -> microcontroller -> embedded controller -> semiconductor IC hierarchy. The PIC architecture uses a Harvard RISC design with 35 single-word instructions and a 14-bit instruction word, achieving deterministic execution that simplifies real-time firmware development compared to accumulator-based CISC 8-bit MCUs. Key features of the PIC16F84A-04/SS include 10-bit successive-approximation ADC, on-chip watchdog timer with dedicated on-chip RC oscillator, power-saving Sleep mode, in-circuit serial programming (ICSP) via two pins, and a 4 MHz internal/external clock domain with software-selectable oscillator modes. The device operates from 4.0 V to 5.5 V across the commercial 0 C to +70 C range, draws typical active current under 2 mA at 4 MHz, and is qualified for industrial and consumer-grade duty cycles. The 20-pin SSOP-20 footprint is pin-compatible with the older PIC16F84 and PIC16F83/CR83/CR84 family members. Typical applications include low-cost embedded control, hobby and educational development boards, user-interface panels, sensor front-ends, simple motor drivers, and legacy product drop-in retrofits. The compact SSOP package enables designs with limited PCB area while exposing sufficient I/O for switches, LEDs, and serial EEPROM expansion. Because of its deterministic instruction timing and minimal peripherals, the PIC16F84A-04/SS is also widely used in teaching curricula for assembly and C-based firmware instruction. When designing with the PIC16F84A-04/SS, ensure the MCLR pin is pulled high through a 10 k resistor, the VDD/VSS rails are bypassed with 0.1 uF ceramics placed within 5 mm of the pins, and the in-circuit serial programming (ICSP) clock/data lines are accessible through test pads or a programming header. For new designs consider the PIC16F628A or PIC16F1825 as more capable drop-in alternatives that include internal oscillator and USART. This page synthesizes distributor pricing, same-family and cross-brand drop-in alternatives, and practical design notes not aggregated in the manufacturer datasheet alone.

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PIC16F84A-04E/P - 8-bit 4MHz Flash MCU, 1.75KB | Microchip
PIC16F84A-04E/P

PIC16F84A-04E/P - 8-bit 4MHz Flash MCU, 1.75KB | Microchip

The Microchip PIC16F84A-04E/P is a CMOS Flash/EEPROM-based 8-bit microcontroller in the PIC16 family, delivering 4 MHz maximum clock speed, 1.75 KB (1K x 14) of Flash program memory, 68 bytes of RAM, and 64 bytes of EEPROM data memory, all housed in a 18-pin PDIP through-hole package. The "04E/P" suffix decodes as 4 MHz max oscillator speed ("04"), extended temperature range -40C to +125C ("E"), and PDIP package ("P"). Instruction execution time is 200 ns at 4 MHz, with 35 single-word instructions in the RISC instruction set, supporting DC to 4 MHz clock input. A PIC16F-series 8-bit microcontroller is a RISC-based microcomputer built around the PIC Harvard architecture that separates program and data buses to allow simultaneous fetch and execute. PIC microcontrollers sit in the broader category hierarchy: 8-bit MCU -> microcontroller -> embedded controller -> semiconductor IC. They are widely used in cost-sensitive, low-power applications where deterministic timing and a small footprint matter more than raw compute performance. Key features include 13 digital I/O pins across PORTA (5) and PORTB (8), individually selectable weak pull-ups on PORTB, interrupt-on-change on RB<7:4>, a 15-bit hardware timer (Timer0) with 8-bit prescaler, a 10-bit Timer0 prescaler, and an 8-bit Timer2 with PWM capability. The device also provides a Watchdog Timer with its own on-chip RC oscillator, in-circuit serial programming (ICSP), and low-power SLEEP mode for battery applications. The architecture is based on a Harvard design with separate 14-bit program memory and 8-bit data memory buses, which lets the CPU fetch the next instruction while reading the current instruction's operand. This single-cycle fetch/execute yields 200 ns instruction time at 20 MHz (4 MHz for the -04 variant). The CMOS Flash process also enables in-system reprogramming without an external ROM eraser. Typical applications include industrial control logic, hobbyist/educational embedded projects, simple sensor readouts, home automation nodes, and legacy product retrofits. The 18-pin PDIP package is breadboard-friendly and supports hand-soldering for development work. A key design consideration is the operating voltage window: PIC16F84A devices are rated for 2.0V to 5.5V (5.5V maximum absolute), so 5V TTL logic systems are straightforward but a 3.3V rail may need level translation on digital I/O. Designers should also budget time to read the family datasheet - configuration word bits (WDTE, CP, etc.) control essential features. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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PIC16F84A-04E/SO - 4MHz 8-Bit Flash MCU, 1.75KB | Microchip
PIC16F84A-04E/SO

PIC16F84A-04E/SO - 4MHz 8-Bit Flash MCU, 1.75KB | Microchip

The Microchip PIC16F84A-04E/SO is an 8-bit CMOS Flash/EEPROM-based microcontroller in the PIC16F family, delivering 4MHz core operation with 1.75KB (1K x 14) of Flash program memory, 68 bytes of SRAM, and 64 bytes of EEPROM data memory in a surface-mount 18-SOIC package. It executes one instruction per 200ns cycle (5 MIPS at 4MHz), features 13 digital I/O pins, and integrates Power-On Reset (POR), Watchdog Timer (WDT), and a 10-bit programmable prescaler. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory (Flash/ROM), data memory (RAM), non-volatile storage (EEPROM), and peripheral I/O onto one silicon die. The PIC16F family sits in Microchip's mid-range architecture taxonomy: 8-bit MCU -> PIC mid-range -> PIC16F -> PIC16F84A. This category hierarchy explains why the PIC16F84A-04E/SO is widely used as an introductory and hobbyist platform - the 35-instruction RISC instruction set is small enough to learn quickly, yet powerful enough to drive real industrial and embedded designs. Key features include the Harvard bus architecture that lets the CPU fetch instructions and data simultaneously, an instruction pipelining scheme that overlaps fetch and execute cycles, and the in-circuit serial programming (ICSP) interface that allows Flash reprogramming without removing the part from the board. The 64-byte on-chip EEPROM supports 1M erase/write cycles typical, enabling non-volatile parameter storage without an external serial EEPROM. The 13 I/O pins can source or sink up to 25mA each, making them capable of directly driving small relays or LED arrays without buffer transistors. Typical applications include legacy industrial controllers, low-cost consumer appliances, hobbyist and educational development boards, automotive interior accessory modules, and remote sensor nodes where the 4MHz clock and 1.75KB Flash are sufficient for periodic polling and interrupt-driven control. Designers migrating from the older PIC16F84 should reference Microchip's migration document, since the PIC16F84A adds hardware improvements such as a 4x PLL option, extended interrupt capability, and lower power consumption. A practical design consideration when using this MCU is its 4MHz maximum oscillator frequency - at higher speeds the designer must move to the PIC16F84A-20 variant. Always place a 0.1uF decoupling capacitor directly across VDD/VSS within 5mm of the pins, and reserve the MCLR pin for a proper reset network (10k pull-up to VDD with a 100nF cap to ground) unless the internal reset is being explicitly relied upon. This page synthesizes real-time distributor pricing, verified drop-in alternative MPNs, and practical engineering design notes drawn from Microchip's datasheet and reference documentation - information not consolidated on a single DigiKey or Mouser product listing.

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PIC16F84A-04E/SS - 8-bit 4MHz 1.75KB Flash MCU | Microchip
PIC16F84A-04E/SS

PIC16F84A-04E/SS - 8-bit 4MHz 1.75KB Flash MCU | Microchip

The Microchip Technology PIC16F84A-04E/SS is an 8-bit CMOS Flash/EEPROM-based microcontroller from the PIC16F family, operating at up to 4 MHz with 200 ns instruction execution and housed in a 20-pin SSOP package. The device integrates 1.75 KB (1K x 14) of Flash program memory, 68 bytes of SRAM data memory, and 64 bytes of EEPROM, with 13 programmable digital I/O pins and essential peripherals including Power-On Reset (POR) and a Watchdog Timer (WDT). A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program and data memory, I/O peripherals, and timers onto one IC. Within the broader taxonomy, the PIC16F84A belongs to the 8-bit MCU class, which sits below 32-bit Cortex-M microcontrollers in compute power but excels at deterministic real-time control, low power consumption, and ease of use. Its 35 single-word RISC instruction set simplifies code development and verification, making it popular for embedded learning and legacy industrial designs. Key features of the PIC16F84A-04E/SS include a 4 MHz maximum clock rate (the -04 speed grade), 1024 words of Flash program memory (1K x 14), 68 bytes of general-purpose SRAM, 64 bytes of data EEPROM, and a wide 2.0 V to 5.5 V operating voltage range. The 13 I/O pins each support independent direction control, while the on-chip peripherals cover the essentials needed for standalone control without external glue logic. The -04E temperature grade extends the operating range to -40C to +125C. Architecturally, the PIC16F84A uses Microchip's Harvard RISC core with separate program and data buses, which enables single-cycle instruction fetch and a deterministic 4-clock instruction cycle at 4 MHz. The 14-bit instruction word packs more opcode space than 8-bit cores, supporting bit-oriented operations, literal arithmetic, and direct/indirect addressing in a single cycle. The integrated EEPROM endurance is rated at 1M erase/write cycles with 40-year data retention, and Flash program memory endurance reaches 1000 erase/write cycles. Typical applications include hobby and educational microcontroller platforms, simple sensor and actuator controllers, automotive interior modules, industrial timing and control subsystems, low-end consumer appliance controllers, and legacy equipment retrofits. The 20-SSOP footprint allows compact board placement where a 18-pin DIP variant cannot fit, while preserving pinout compatibility with the PIC16F84A series. When designing with this part, mind the difference between the -04 (4 MHz) and -10 (10 MHz) speed grades, and note the supply-current increase at higher clock rates. Ensure decoupling capacitors are placed within 5 mm of VDD, and confirm the in-circuit serial programming (ICSP) connections (RB6, RB7, MCLR) are accessible during production for firmware load. According to Microchip documentation, the device is part of the mature PIC16F84A family, with newer 16F1xxx mid-range parts offering upgraded peripherals for new designs. This page synthesizes distributor pricing, drop-in alternative cross-references, and practical design notes that complement the manufacturer datasheet. Engineers evaluating this part for new designs should weigh the PIC16F84A's simplicity and code stability against newer PIC16F1xxx alternatives that offer more peripherals at comparable cost.

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PIC16F84A-04I/P - 8-bit Flash MCU, 4MHz, 1.75KB | Microchip DIP-18
PIC16F84A-04I/P

PIC16F84A-04I/P - 8-bit Flash MCU, 4MHz, 1.75KB | Microchip DIP-18

The Microchip Technology PIC16F84A-04I/P is an 8-bit CMOS Flash/EEPROM-based RISC microcontroller in a 18-pin PDIP through-hole package, rated for 4 MHz operation across the industrial temperature range (-40C to +85C). It integrates 1.75 KB of Flash program memory (1024 x 14 words), 68 bytes of RAM, 64 bytes of EEPROM data memory, and 13 general-purpose digital I/O pins, all delivered through a 35-instruction RISC core that executes most instructions in a single 200 ns cycle at 20 MHz. A microcontroller (MCU) is a single-chip computer that integrates a CPU, non-volatile program memory (Flash/ROM), volatile data memory (RAM), and peripheral interfaces (I/O, timers, communications). Within the broader semiconductor taxonomy, an MCU sits below the microprocessor (which requires external memory) but above custom logic ICs. The PIC16F84A belongs to the PIC mid-range family of 8-bit microcontrollers, itself a subset of Microchip's 8-bit PIC portfolio alongside PIC10/12/14/16/18 families. Its position as a mid-range Flash MCU made it one of the most widely adopted learning and hobbyist controllers between the late 1990s and 2010s. The PIC16F84A uses a Harvard architecture with separate code and data buses, a 14-bit instruction word, and two hardware I/O ports (PORTA 5-bit, PORTB 8-bit). Key features include a watchdog timer with on-chip RC oscillator, power-on reset, brown-out detection, power-saving sleep mode, in-circuit serial programming (ICSP) via RB6/RB7, and four interrupt sources. The internal RC timing chain supports selectable clock modes including external crystal/ceramic resonator and low-power LF oscillator. Typical applications span legacy embedded control, industrial sensor conditioning, simple keypad scanners, hobbyist robotics, educational development boards, and battery-powered instruments where 1.75 KB of Flash and 13 I/O pins are sufficient. Modern designs typically migrate to PIC16F628A, PIC16F88, PIC16F1827, or PIC16F1xxx enhanced mid-range cores, but the original PIC16F84A remains in production for long-lifecycle industrial and automotive aftermarket designs. When designing with this device, note the 4 MHz speed grade designation (-04 vs -20); at 5V the -04 grade operates up to 4 MHz and the -20 grade up to 20 MHz. Power supply decoupling requires a 100 nF ceramic capacitor close to VDD with a bulk 10-47 uF electrolytic, and MCLR must be pulled high through a 10-47 kohm resistor for normal operation. This page synthesizes distributor pricing, drop-in 18-pin PDIP alternatives, and practical design notes not consolidated in the manufacturer datasheet alone. Engineers seeking modern feature parity should consult the PIC16F628A migration guide referenced in the design notes.

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PIC16F84A-04I/SO - 4MHz 8-bit Flash MCU, 1.75KB | Microchip
PIC16F84A-04I/SO

PIC16F84A-04I/SO - 4MHz 8-bit Flash MCU, 1.75KB | Microchip

The Microchip Technology PIC16F84A-04I/SO is an 8-bit RISC microcontroller from the legendary PIC16F84A family, packaged in an 18-pin SOIC (SO) and rated for 4 MHz operation across the industrial temperature range. The device integrates 1.75 KB of self-programmable Flash program memory (1024 × 14-bit words), 68 bytes of SRAM, and 64 bytes of EEPROM data memory, packaged as an 18-pin SOIC. What is an 8-bit Flash microcontroller? A microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, data memory, and peripherals. The 8-bit designation means the CPU processes data 8 bits at a time; Flash memory allows in-system reprogrammability. Within the broader semiconductor taxonomy, an 8-bit MCU belongs to the microcontroller family, itself a subset of microprocessors and embedded processors. The PIC16F84A family pioneered in-circuit serial programming (ICSP) and remains a teaching staple for embedded engineering curricula. Key features include 35 single-word instructions (most single-cycle at 200 ns), 13 digital I/O pins with individual direction control, a 14-bit instruction word, and a hardware USART/SCI for asynchronous serial communication (PIC16F84A revision). The device supports 8-bit × 8-bit hardware multiply, a watchdog timer with on-chip RC oscillator for reliable operation, and an in-circuit debugger (ICD) interface. The PIC16F84A also offers power-saving SLEEP mode and four oscillator options (RC, LP, XT, HS) for design flexibility. Architecturally, the PIC16F84A uses a Harvard bus architecture with separate program and data paths, enabling simultaneous instruction fetch and operand access. The RISC instruction set (35 instructions) simplifies compiler design and accelerates learning cycles. Its CMOS implementation delivers extremely low power consumption (~2 mA active at 4 MHz, <1 µA standby), making it suitable for battery-backed designs, while the optional on-chip 4 MHz RC oscillator simplifies BOM by eliminating an external crystal in cost-sensitive applications. Typical applications include legacy industrial control, hobby robotics, low-cost sensor front-ends, PIC learning/development boards, simple UART-to-GPIO bridges, and replacement of older PIC16C84 designs. Education kits benefit from the small instruction set, while production designs leverage the EEPROM for parameter storage. When designing with this part, ensure MCLR reset is properly pulled up through a 10 kΩ resistor and that the ICSP clock/data lines are reserved for production programming. Choose the oscillator mode carefully; the -04 speed grade is specified for 4 MHz operation, so the 20 MHz PIC16F84A-20 variant is required for higher clock rates. Brown-out detection is not internal - external supervision is recommended for harsh industrial environments. This page synthesizes distributor inventory, parametric cross-reference data, and practical design guidance not available in a single source.

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PIC16F84A-20/P - 8-Bit 20MHz 1.75KB Flash MCU | Microchip DIP-18
PIC16F84A-20/P

PIC16F84A-20/P - 8-Bit 20MHz 1.75KB Flash MCU | Microchip DIP-18

The Microchip Technology PIC16F84A-20/P is an 8-bit CMOS Flash/EEPROM-based mid-range microcontroller in the PIC16 family, executing one instruction every 200 ns at a 20 MHz oscillator and packaged in an 18-pin PDIP (DIP-18). It integrates 1.75 KB (1K x 14) of Flash program memory, 68 bytes of SRAM data memory, and 64 bytes of EEPROM, with 13 digital I/O pins organized on two ports (PORTA, PORTB) and a 15-bit hardware stack supporting two levels of subroutine nesting. A microcontroller (MCU) is a single-chip computer containing a CPU core, program and data memory, peripherals, and I/O on one die, designed for embedded control tasks. Within the semiconductor taxonomy, the PIC16F84A belongs to the 8-bit MCU family, which sits under the broader category of microcontrollers and finally under integrated circuits. The PIC architecture uses a RISC instruction set with only 35 single-word instructions, which simplifies learning while still delivering deterministic real-time performance. Key features include 20 MHz maximum clock, 4.0-5.5 V single-supply operation, 13 digital I/O lines, an 8-bit timer (TMR0) with 8-bit prescaler, a Watchdog Timer with its own on-chip RC oscillator for reliable resets, and an ICD-friendly in-circuit serial programming (ICSP) interface via RB6/RB7. The 64-byte EEPROM supports 1M erase/write cycles typical, allowing non-volatile storage of calibration constants or user settings. Internally, the device uses a Harvard architecture with separate program and data buses, supporting 14-bit wide instructions and 8-bit wide data. Power consumption is minimized by the nanoWatt technology features: SLEEP mode with < 1 µA typical standby current, software-controlled oscillator switching between INTOSC mode if available in derivative parts, and selective peripheral disable. Typical applications include hobbyist robotics, hobby-grade learning boards, simple sensor interfaces, automotive interior accessories, small appliances, IR remote control decoders, LED sequencing controllers, and legacy industrial control retrofits that still rely on the original PIC16F84A pinout. The PIC16F84A's enduring popularity is driven by thousands of university textbooks and legacy code libraries still referencing the part. When designing, route ICSPDAT (RB6) and ICSPCLK (RB7) away from high-frequency switching nodes, place a 100 nF decoupling capacitor within 5 mm of VDD, and ensure the MCLR pull-up is at least 10 kΩ to allow reliable in-circuit programming. The internal oscillator of the 'A' revision eliminates the need for external crystals in cost-sensitive designs. This page synthesizes distributor pricing from DigiKey/Mouser/Octopart, lists Microchip cross-references from the migration document DS30072, and consolidates practical design notes and pin-compatible alternatives that are not collected in any single manufacturer source.

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PIC16F84A-20/SO - 8-bit 20MHz Flash MCU, 1.75KB | Microchip
PIC16F84A-20/SO

PIC16F84A-20/SO - 8-bit 20MHz Flash MCU, 1.75KB | Microchip

The Microchip Technology PIC16F84A-20/SO is an 8-bit CMOS Flash/EEPROM-based mid-range microcontroller delivering 20 MHz instruction execution (200 ns per instruction cycle) from a 4.0–5.5 V supply, housed in an 18-pin SOIC (0.300 inch, 7.50 mm body) package. It integrates 1.75 KB (1K x 14) of Flash program memory, 68 bytes of RAM, and 64 bytes of EEPROM data memory, providing a self-contained solution for embedded control with on-chip non-volatile storage. A microcontroller (MCU) is a single-chip computer containing a CPU, memory, and programmable I/O peripherals. The PIC16F84A belongs to Microchip's mid-range PIC16 family, positioned between the baseline PIC10/12/16 series and the high-performance PIC18/dsPIC families. Mid-range MCUs balance code density, peripheral set, and cost, making them well suited to consumer, industrial, and educational designs where 8-bit and more compute headroom than a 6-pin baseline device is required. The device offers 13 bidirectional digital I/O pins organized into two ports (PORTB 8-bit, PORTA 5-bit), a 14-bit instruction word, 35 single-word instructions, an 8-level deep hardware stack, and a configurable Watchdog Timer with its own on-chip RC oscillator. An In-Circuit Serial Programming (ICSP) interface allows Flash/EEPROM programming without removing the part from the board, and an In-Circuit Debugger (ICD) is supported via the RB6/RB7 pins. Power-management features include nanoWatt Technology with selectable Sleep, Run, Idle, and power-on Reset modes to minimize quiescent current in battery-fed designs. Architecturally the PIC16F84A uses a Harvard RISC core with separate program and data buses, enabling single-cycle instruction fetch while the previous instruction executes. The high-endurance Flash cell is rated for 1,000 erase/write cycles, and EEPROM supports 1,000,000 erase/write cycles for non-volatile data logging. The part targets applications where simplicity, deterministic timing, and field-upgradability matter more than raw throughput. Typical end uses include educational trainer boards, hobbyist prototyping platforms, simple sensor and appliance controllers, low-volume industrial automation, and drop-in replacements for legacy PIC16F84 designs. Its wide adoption makes it a frequent reference design for teaching RISC fundamentals. Designers should note that migrating legacy PIC16F84 code may require consulting Microchip's PIC16F84-to-PIC16F84A migration document (DS30072) for subtle register differences. For reliable operation, place 0.1 uF decoupling close to VDD and confirm the configured oscillator mode matches the external crystal or internal RC selection. When in-circuit debugging is required, dedicate RB6/RB7 to ICSP and avoid high-impedance analog loads on these pins during programming cycles.

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PIC16F84A-20/SS - 8-Bit 20MHz 1.75KB Flash MCU SSOP-20
PIC16F84A-20/SS

PIC16F84A-20/SS - 8-Bit 20MHz 1.75KB Flash MCU SSOP-20

The Microchip Technology PIC16F84A-20/SS is an 8-bit CMOS Flash/EEPROM-based microcontroller in the PIC16F family, delivering 20 MIPS performance (200 ns instruction execution) with 1.75 KB of program Flash plus 64 bytes of EEPROM data memory and 68 bytes of general-purpose RAM, all housed in a 20-pin SSOP (Shrink Small Outline Package). It runs at up to 20 MHz clock from a 4.0 V to 5.5 V supply and exposes 13 bidirectional digital I/O pins plus one input-only pin, making it one of the original "workhorse" 18-pin-class 8-bit microcontrollers. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory, working RAM, and configurable peripheral I/O. Within the broader taxonomy, the PIC16F84A sits in the mid-range PIC16 family of 8-bit RISC microcontrollers from Microchip Technology, which in turn is part of the wider semiconductor category of embedded processors and microcontrollers. The 8-bit PIC architecture uses a Harvard design with separate code and data buses and a small, deterministic instruction set ideal for real-time control tasks. Key features include 1.75 KB (1K x 14) of self-programmable Flash program memory, 64 bytes of EEPROM, 68 bytes of RAM, 13 fully featured I/O pins with individual direction control, a 14-bit-wide instruction word, two 8-bit timers (Timer0, Timer2) plus one 16-bit timer (Timer1) with an external capture input, an 8-bit prescaler shared with the watchdog timer, an analog comparator, a hardware USART (SCI), and a synchronous serial port (SSP) supporting SPI. The device also includes a power-on reset (POR), brown-out reset (BOR) option, watchdog timer with on-chip RC oscillator, and Microchip's nanoWatt Technology for power-managed sleep modes that drop quiescent current into the microamp range. Typical applications include hobbyist and educational boards, sensor interfacing, simple motor and relay control, low-cost industrial control, electronic metering, and any design that benefits from the very small footprint, robust Flash self-programmability, and a mature toolchain (MPLAB X, MPASM, XC8). The SSOP-20 form factor suits compact SMD designs that cannot accommodate the 18-pin DIP. Design tip: route the MCLR pin through a proper pull-up network (typically 10 kohm to VDD), provide bulk decoupling (100 nF + 10 uF) within 5 mm of the VDD pin, and configure the configuration bits (fuses) carefully because the PIC16F84A will not execute code with a misprogrammed oscillator or watchdog setting. The I/O sink/source current is approximately 25 mA per pin and 200 mA total, so use current-limiting resistors on LED loads. This page synthesizes distributor pricing, drop-in PIC16F84A-package alternatives, and practical design notes not found in the manufacturer datasheet.

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PIC16F84A-20E/P - 8-Bit 20MHz 1.75KB Flash MCU | Microchip
PIC16F84A-20E/P

PIC16F84A-20E/P - 8-Bit 20MHz 1.75KB Flash MCU | Microchip

The Microchip Technology PIC16F84A-20E/P is an 8-bit CMOS Flash/EEPROM-based microcontroller in the PIC16F family, housed in a 18-pin PDIP (Through-Hole) package with an extended operating temperature range (-40C to +125C). The device delivers 20 MHz maximum clock speed, 200 ns instruction cycle time, and 1.75 KB (1K x 14) of Flash program memory with 68 bytes of RAM and 64 bytes of EEPROM data memory, plus 13 digital I/O pins organized on 2 ports (PORTB 8-bit, PORTA 5-bit). A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, working RAM, non-volatile EEPROM data storage, and programmable I/O peripherals. PIC microcontrollers from Microchip use a Harvard RISC architecture with separate program and data buses, allowing instruction fetch and data access to occur in the same cycle. The PIC16F84A belongs to the Mid-Range 14-bit instruction family and executes 35 single-word instructions per cycle, providing deterministic real-time behavior ideal for embedded control. Key features of the PIC16F84A-20E/P include 1.75 KB self-programmable Flash program memory, 64 bytes of true EEPROM for non-volatile data storage, a hardware USART0 multiplier (note: PIC16F84A has no USART - it provides a 8-bit timer/counter TMR0 with programmable prescaler, watchdog timer, and 4 oscillator options including XT, HS, LP, and RC), in-circuit serial programming (ICSP) via two pins, and power-on reset / brown-out detection support. The 20E suffix designates the 20 MHz speed grade with the Extended (-40C to +125C) operating temperature range. The PIC16F84A-20E/P uses a RISC pipeline executing one instruction per cycle (4 clock cycles per instruction cycle), with 200 ns instruction execution time at 20 MHz. The internal architecture separates 14-bit program word Flash from 8-bit data RAM and 8-bit EEPROM, accessed through separate address spaces. An 8-bit prescaler extends the TMR0 timer/counter to effective 16-bit operation, and a hardware watchdog timer (WDT) with its own on-chip RC oscillator improves reliability in unattended installations. Typical applications for the PIC16F84A-20E/P include hobbyist and educational projects, simple sensor interfaces, low-volume industrial controllers, appliance control boards, legacy embedded designs migrated from PIC16C84 OTP parts, and timing/sequencing applications in industrial control panels. Its 13 I/O pins and small footprint make it well-suited for breadboard prototyping and Through-Hole PCB assembly. When designing with the PIC16F84A-20E/P, place a 100 nF decoupling capacitor directly across VDD/VSS within 5 mm of the pins, select the oscillator mode (XT/HS/LP/RC) appropriate for the crystal frequency, and ensure MCLR is tied to VDD through a 10 kohm resistor for normal operation or driven low for in-circuit reset. The 20E temperature grade extends operation to -40C to +125C - verify that your application's thermal envelope matches the E grade rather than the I (industrial, -40C to +85C) or no-suffix (commercial, 0C to +70C) variant. This page synthesizes distributor pricing, drop-in alternatives drawn from the same PIC16F family, and practical design notes that go beyond the manufacturer datasheet summary - giving buyers and engineers a single reference for the PIC16F84A-20E/P.

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PIC16F84A-20E/SO - 8-Bit 20MHz Flash MCU, 1.75KB | Microchip
PIC16F84A-20E/SO

PIC16F84A-20E/SO - 8-Bit 20MHz Flash MCU, 1.75KB | Microchip

The Microchip Technology PIC16F84A-20E/SO is an 8-bit CMOS Flash/EEPROM microcontroller based on the PIC16 architecture, executing one instruction per 200 ns cycle (5 MHz instruction-rate from a 20 MHz oscillator). It integrates 1.75 KB (1K x 14) of Flash program memory, 68 bytes of SRAM, and 64 bytes of EEPROM data memory in an 18-pin SOIC package (0.295 inch / 7.50 mm body width). The device operates from 4.0 V to 5.5 V across the extended industrial temperature range of -40 °C to +125 °C. An MCU (microcontroller unit) is a single-chip computer that integrates a CPU core, non-volatile program memory, working RAM, I/O peripherals, and timers in one package; the PIC16 family belongs to Microchip's mid-range 8-bit PIC architecture lineage, broadly classified as an 8-bit microcontroller -> MCU -> embedded processor -> semiconductor IC. The 'F' in PIC16F84A denotes Flash program memory (reprogrammable in-circuit), and the 'A' revision adds the enhanced 14-bit instruction set and improved Flash endurance compared to the original PIC16F84. Key features include 13 general-purpose digital I/O pins, a 20 MHz maximum oscillator input (5 MIPS sustained throughput), 8-bit timer/counter (TMR0) with 8-bit prescaler, a 16-bit timer/counter (TMR1) with dedicated prescaler, a Watchdog Timer (WDT) with its own on-chip RC oscillator for reliable reset, and Power-On Reset (POR). The 14-bit instruction set comprises only 35 single-word instructions, simplifying code development and shortening learning curves for new embedded designers. The device supports in-circuit serial programming (ICSP) via two pins (RB6/ICSPCLK and RB7/ICSPDAT), enabling firmware updates without removing the MCU from the board. Typical applications include hobbyist and educational projects, low-volume embedded controllers, automotive body and interior modules, industrial sensor interfaces, simple motor control, LED driving patterns, and legacy PIC16F84 replacement designs. The 18-SOIC footprint is compatible with the original PIC16F84A-20/SO, allowing drop-in PCB reuse. The 'E' suffix in -20E/SO indicates the extended -40 °C to +125 °C operating temperature grade (vs. 'I' = industrial -40 °C to +85 °C, no suffix = 0 °C to +70 °C commercial), while '20' specifies the 20 MHz maximum oscillator frequency and 'SO' designates the 18-pin SOIC package. Design considerations include a minimum 4.0 V supply (the device will NOT operate from 3.3 V rails commonly used by modern ARM Cortex-M parts), 5 V-tolerant I/O only, and an external oscillator or crystal required for timing. The WDT should be enabled in any field-deployed product to recover from software lockup. Decouple VDD with at least 0.1 µF ceramic plus 10 µF bulk within 5 mm of the supply pin, and keep oscillator traces short and ground-guarded for noise immunity. This page synthesizes distributor pricing, drop-in same-package alternatives, application guidance, and design notes not found in the manufacturer datasheet alone - intended for both new PIC16F84A designs and engineers modernizing legacy PIC16F84 production boards.

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PIC16F84A-20I/P - 8-Bit 20MHz 1.75KB Flash MCU | Microchip
PIC16F84A-20I/P

PIC16F84A-20I/P - 8-Bit 20MHz 1.75KB Flash MCU | Microchip

The Microchip Technology PIC16F84A-20I/P is an 8-bit CMOS Flash/EEPROM-based microcontroller in the PIC16 mid-range family, delivering 20 MHz clock input with a 200 ns instruction cycle in a 18-pin PDIP (P) package with industrial temperature grade (-40C to +85C). It integrates 1024 words (1.75 KB) of Flash program memory, 68 bytes of data RAM, and 64 bytes of EEPROM data memory, with 13 digital I/O pins across PORTA and PORTB. The device executes a compact 35-instruction RISC set, branches are two-cycle while all other instructions complete in one cycle, easing code development and shortening time-to-market for embedded designers. A microcontroller (MCU) is a single-chip computer that contains a CPU, program memory, RAM, peripherals, and I/O. Microcontrollers belong to the broader integrated circuit family and are the foundation of embedded systems that automate industrial, consumer, and automotive products. The PIC16 mid-range family sits in Microchip's 8-bit portfolio between the baseline 12/14-bit cores and the 16-bit dsPIC/PIC24 lines, balancing code density, peripheral integration, and cost for entry-level to mid-tier designs. Key features include 200 ns instruction execution, 8-bit timer/counter, 13 I/O pins with individual direction control, 4 MHz internal oscillator-free operation (relies on external crystal or RC), 256-byte EEPROM, in-circuit serial programming (ICSP) capability, watchdog timer with on-chip RC oscillator, and power-saving sleep mode. The device operates from 2.0 V to 5.5 V (industrial temp grade), draws less than 1 mA typical operating current at 5 V/4 MHz, and supports brown-out detection via the configuration bits. The 13 I/Os source/sink up to 25 mA, sufficient to drive small relays or LEDs directly. The architecture is Harvard RISC with separate 14-bit program bus and 8-bit data bus, deep hardware stack of 8 levels, and configurable internal/external oscillator selection. Peripheral integration includes one 8-bit timer with prescaler and one 16-bit timer (Timer0/Timer1, depending on variant) and a synchronous serial port (SSP) for SPI/I2C master mode, supporting EEPROM and peripheral expansion. The Flash memory supports 1000 erase/write cycles typical and 40-year data retention, suitable for in-field firmware updates via ICSP. Typical applications include hobbyist and educational platforms, consumer appliance controls, low-end automotive body electronics (non-AEC-Q100), sensor interfaces, lighting controllers, small motor drives via MOSFET gates, and serial-protocol bridges (SPI/UART). The 20 MHz speed with 5 V tolerance allows direct interfacing to legacy 5 V peripherals while the ICSP header keeps prototype iteration fast. When designing with PIC16F84A-20I/P, remember it is NOT a drop-in replacement for PIC16F628A or PIC16F88 in all cases due to differing peripheral register layouts - verify register maps before migration. Always install a 100 nF decoupling capacitor on VDD close to the pin, a 10-100 ohm resistor on MCLR if not driven directly, and ensure the oscillator configuration bits match the chosen XT/HS/LP/RC mode to avoid start-up failures. This page synthesizes distributor pricing, pin-compatible Microchip drop-in alternatives, and practical design notes not found in the manufacturer datasheet, delivering engineering context beyond raw specification tables.

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PIC16F84A-20I/SO - 20MHz 8-Bit Flash MCU 18-SOIC | Microchip
PIC16F84A-20I/SO

PIC16F84A-20I/SO - 20MHz 8-Bit Flash MCU 18-SOIC | Microchip

The Microchip Technology PIC16F84A-20I/SO is a 20 MHz, 8-bit CMOS Flash/EEPROM-based microcontroller in an 18-pin SOIC package, industrial temperature grade (-40C to +85C). It integrates 1.75 KB (1K x 14) of Flash program memory, 68 bytes of SRAM, 64 bytes of EEPROM data, and 13 digital I/O pins in the PIC16 mid-range RISC family. What is a PIC16F84A? The PIC16F84A is a classic member of Microchip's PIC mid-range 8-bit microcontroller family. Microcontrollers (MCUs) are single-chip computers that integrate CPU, program memory, data memory, and programmable I/O peripherals; this particular part belongs to the "enhanced Flash MCU" sub-family and is targeted at simple embedded control tasks where deterministic instruction execution and easy in-circuit serial programming matter more than raw MIPS. It sits in the taxonomy: microcontroller -> 8-bit MCU -> PIC16 family -> PIC16F84A. Key features include 200 ns instruction execution (5 MIPS at 20 MHz), 35 single-word instructions, 14-bit wide instruction word, two hardware timers (Timer0 with 8-bit prescaler, Timer2), 10-bit resolution capture/compare/PWM, and a 4 MHz internal RC oscillator option. The 13 I/O pins source/sink up to 25 mA each, enabling direct LED or relay drive without external buffers. Architecturally the PIC16F84A uses Harvard memory with separated code and data buses, 8-level deep hardware stack, and a 14-bit instruction word optimized for compact code density. The Flash program memory supports in-system serial programming (ICSP) via RB6/RB7, allowing firmware updates after PCB assembly without desoldering the device. Typical applications include consumer appliances, automotive body electronics, industrial control modules, sensor signal conditioning, and educational/hobbyist designs. The device's small footprint and mature toolchain (MPLAB X + XC8) make it a frequent choice for cost-sensitive, low-pin-count embedded products. When designing with this part, pair it with a 100 nF decoupling capacitor on VDD and an external 4 MHz or 20 MHz crystal between OSC1/OSC2 for timing-accurate applications; software delay loops are sufficient if only the internal 4 MHz RC oscillator is used. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes for the PIC16F84A-20I/SO that complement the manufacturer datasheet with concise, citation-ready engineering context.

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PIC16F84A-20I/SS - 8-Bit 20MHz 1.75KB Flash MCU | Microchip
PIC16F84A-20I/SS

PIC16F84A-20I/SS - 8-Bit 20MHz 1.75KB Flash MCU | Microchip

The Microchip Technology PIC16F84A-20I/SS is an 8-bit CMOS Flash/EEPROM-based microcontroller in the PIC16 family, operating at up to 20 MHz with 1.75 KB (1K x 14) of Flash program memory, 68 bytes of RAM, and 64 bytes of EEPROM data memory, housed in a 20-pin SSOP package. It executes instructions in 200 ns and is built on Microchip's powerful PIC RISC architecture with only 35 single-word instructions, enabling rapid development and code density. An 8-bit microcontroller (MCU) is a small computer-on-a-chip integrating a CPU, program memory, data RAM, non-volatile EEPROM, and programmable I/O on a single die. Within the semiconductor hierarchy, MCUs sit under microcontrollers -> embedded controllers -> computing ICs, and they serve as the embedded intelligence in billions of appliances, sensors, and industrial nodes worldwide. Key features include 13 digital I/O pins with individually programmable direction, a 14-bit wide instruction word for compact code, a 10-bit capture/compare/PWM module, in-circuit serial programming (ICSP), and wide operating voltage from 2.0V to 5.5V. The device also supports hardware USART via software bit-banging and provides 100,000 erase/write cycle endurance on Flash and 1,000,000 on EEPROM. The PIC16F84A-20I/SS uses a Harvard RISC architecture with separate program and data buses, and a 15-stage hardware stack. The -20 speed grade delivers 20 MHz operation and 200 ns instruction cycle, while the -I suffix specifies the industrial temperature range of -40C to +85C for harsh-environment deployment. Power-saving features include the nanoWatt technology Sleep mode with wake-up on pin change. Typical applications include hobbyist education platforms (Arduino-style development), industrial sensor interfacing, low-cost appliance control, security and access-control panels, automotive interior modules, and battery-powered remote-control units where the small SSOP footprint and proven PIC toolchain reduce BOM cost and time-to-market. When designing with this device, reserve the MCLR/VPP pin for in-circuit programming and ensure decoupling of VDD with a 100 nF ceramic capacitor placed within 5 mm of the pin. For battery applications, leverage the nanoWatt Sleep mode to drop supply current to microamp levels during idle periods. This page synthesizes distributor pricing, verified drop-in alternatives, and practical design notes not found in the manufacturer datasheet, providing an engineer-grade reference beyond standard catalog listings.

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PIC16F84AT-04/SS - 4MHz 8-Bit MCU 1.75KB Flash SSOP-20 | Microchip
PIC16F84AT-04/SS

PIC16F84AT-04/SS - 4MHz 8-Bit MCU 1.75KB Flash SSOP-20 | Microchip

The Microchip Technology PIC16F84AT-04/SS is an 8-bit RISC flash microcontroller from the PIC16F family, delivering 4 MHz maximum clock input with 68 bytes of RAM, 1.75 KB (1K x 14) of Flash program memory, and 64 bytes of EEPROM data memory in a 20-pin SSOP package. A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory, and programmable I/O peripherals, enabling embedded control in products ranging from washing machines to industrial sensors. The PIC16F84A sits in the legacy mid-range PIC family, descending from the broader 8-bit PIC10/12/16 hierarchy and ultimately from the RISC microcontroller class that dominates cost-sensitive embedded designs. Key features include 13 general-purpose digital I/O pins, an integrated Power-On Reset (POR), Watchdog Timer (WDT), and a 35-instruction set where every instruction executes in a single 400 ns cycle except program branches which take two cycles. The device supports in-circuit serial programming (ICSP) and operates from a single 4.0 V to 5.5 V supply, making it suited to legacy 5 V logic systems. Architecturally, the PIC16F84A uses a Harvard architecture with separate code and data buses, a 14-bit instruction word, and a hardware stack that supports direct interrupt context save. Its CMOS, fully-static design allows the clock to be stopped without losing register contents, an important feature for low-power applications. Typical applications include legacy industrial control nodes, hobby electronics, retro product maintenance, simple sensor readouts, and educational platforms where the 5V operation and breadboard-friendly PICkit programmer compatibility matter more than raw MIPS. When designing with the PIC16F84AT-04/SS, ensure MCLR is tied through a proper pull-up and decoupling capacitors are placed within 5 mm of VDD/VSS. Operating temperature is 0°C to +70°C (commercial grade) per the verified distributor data. This page synthesizes distributor pricing, drop-in alternatives and practical design notes that supplement the Microchip datasheet and cross-reference tools.

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PIC16F84AT-04I/SO - 4MHz 8-bit Flash MCU, 1.75KB | Microchip
PIC16F84AT-04I/SO

PIC16F84AT-04I/SO - 4MHz 8-bit Flash MCU, 1.75KB | Microchip

The Microchip PIC16F84AT-04I/SO is an 8-bit CMOS Flash/EEPROM-based microcontroller from the PIC16F8X family, housed in an 18-pin SOIC package. It features 4 MHz maximum clock input, 1.75 KB (1K x 14) of Flash program memory, 68 bytes of RAM, 64 bytes of EEPROM data memory, and 13 digital I/O pins supporting 4 MHz operation across an industrial temperature range. An 8-bit microcontroller (MCU) is a single-chip computer integrating a CPU, memory (Flash program + RAM + EEPROM), and peripherals on one die. The PIC16F8X family sits inside the mid-range PIC16CXX series of low-cost, high-performance, fully-static CMOS RISC microcontrollers. Hierarchy: 8-bit MCU -> microcontroller -> embedded IC -> semiconductor. The 'T' suffix denotes tape-and-reel packaging, '04' indicates the 4 MHz speed grade, 'I' specifies the industrial temperature range (-40C to +85C), and 'SO' is the 18-pin SOIC package designation. Key features include a 14-bit instruction word with only 35 single-word instructions, 200 ns instruction cycle at 4 MHz (most instructions are single-cycle), an 8-level hardware stack, and 15 special-function hardware registers. The device integrates an EEPROM with 1 million erase/write cycles endurance and 40-year data retention, a watchdog timer with on-chip RC oscillator, power-on reset, power-saving Sleep mode, and an in-circuit serial programming (ICSP) interface for field upgrades without removing the part. Architecturally, the PIC16F84A uses a Harvard RISC core with separate program and data buses, giving deterministic instruction timing. The 4 MHz oscillator drives a 4-stage pipeline-free core that executes one instruction per instruction cycle (except branches which are 2-cycle). Compared to CISC architectures, this RISC approach yields higher code density per MHz and predictable interrupt latency. The integrated EEPROM allows parameter storage without external serial memory. Typical applications include industrial control systems, low-power remote sensors, smart-card readers, small appliance controls, hobbyist projects and educational prototyping, and battery-powered embedded systems where Sleep mode current is critical. The 13 I/O pins can directly drive LEDs, sense switches, or bit-bang serial protocols like UART and I2C in software. When designing, note that 4 MHz is the rated maximum at 5V VDD; operation above this frequency requires the -20 speed grade. Also reserve one I/O pin for ICSP if you intend in-field firmware updates, or plan for ISP header access during production.

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PIC16F84AT-04I/SS - 4MHz 8-bit Flash MCU 1.75KB | Microchip
PIC16F84AT-04I/SS

PIC16F84AT-04I/SS - 4MHz 8-bit Flash MCU 1.75KB | Microchip

The Microchip Technology PIC16F84AT-04I/SS is an 8-bit CMOS RISC microcontroller in the PIC16F family, featuring a 4 MHz core, 1.75 KB (1K x 14) of Flash program memory, 68 bytes of SRAM, and 64 bytes of EEPROM, housed in a 20-pin SSOP package. It integrates 13 general-purpose digital I/O pins, a Power-On Reset (POR), a Watchdog Timer (WDT), and 35 single-word instructions, with all instructions executing in a single cycle except program branches which take two cycles (400 ns instruction cycle at 10 MHz clock input). A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory, and programmable I/O peripherals. The PIC16F84A belongs to the 8-bit microcontroller hypernym, then to the CMOS RISC architecture family, then to the microcontroller category, then to the embedded computing class. This 8-bit MCU category occupies the low-power, deterministic, low-cost niche of embedded systems, typically used where predictable timing and code simplicity outweigh raw throughput. Key features include a 4 MHz maximum operating frequency (10 MHz on the -10 variant), 1024 x 14 words of Flash program memory with in-circuit serial programming support, 64 bytes of EEPROM data memory with 1M erase/write cycle endurance, and 13 bidirectional I/O pins with individual direction control. The device operates over an industrial temperature range of -40C to +85C and supports supply voltages from 2.0V to 5.5V, with low-power consumption suitable for battery-backed designs. The PIC16F84A uses Microchip's classic Harvard RISC architecture with separate program and data buses, 14-bit wide instruction word, and a hardware stack depth of 8 levels. Its deterministic instruction timing simplifies real-time control loops, while the 35-instruction RISC set reduces code density overhead compared to CISC 8-bit MCUs of the same era. Typical applications include industrial control logic, hobbyist and educational microcontroller boards, simple sensor interfaces, automotive body electronics (non-safety), and legacy embedded system replacements. The 13 I/O and 1.75 KB Flash make it well-suited to small deterministic control tasks where upgrade cost outweighs the benefit of migrating to a newer PIC16F1xxx or PIC18 family part. When designing with this part, note that the original PIC16F84 (non-A) is officially marked obsolete by Microchip and replaced by the PIC16F84A. Choose the -04 speed grade (4 MHz) for low-power or 5V designs; the -10 grade (10 MHz) is required only when the 400 ns instruction cycle must be exploited at full throughput. This page consolidates distributor pricing, package-compatible drop-in alternatives within the PIC16F84A family, and practical design notes not found in the manufacturer datasheet alone.

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PIC16F84AT-20/SO - 8-bit 20MHz 1.75KB Flash MCU | Microchip
PIC16F84AT-20/SO

PIC16F84AT-20/SO - 8-bit 20MHz 1.75KB Flash MCU | Microchip

The Microchip PIC16F84AT-20/SO is an 8-bit Flash/EEPROM-based CMOS microcontroller from the PIC16F8X family, delivering 20 MHz operation (200 ns instruction cycle) in an 18-pin SOIC package. The device integrates 1.75 KB (1K x 14) of Flash program memory, 68 bytes of RAM, 64 bytes of EEPROM data memory, and 13 digital I/O pins, making it a workhorse for embedded control and education markets. An 8-bit microcontroller (MCU) is a self-contained computer-on-a-chip that combines a CPU, program memory (Flash/ROM), working RAM, non-volatile EEPROM, and programmable I/O peripherals on a single silicon die. The PIC16F84AT belongs to the "Enhanced Flash Microcontrollers with nanoWatt Technology" family in Microchip's taxonomy: 8-bit MCU -> PIC16 family -> PIC16F8X sub-family -> mid-range MCU with Harvard architecture. The Harvard architecture separates program and data buses, which lets the CPU fetch instructions and read data in the same cycle, simplifying instruction decoding and enabling deterministic real-time behaviour. Key features include 35 single-word instructions (most execute in one instruction cycle), a hardware 8-bit timer/counter (TMR0) with an 8-bit prescaler, a 16-bit timer (TMR1) with dedicated low-power oscillator option, an analog 5-channel 8-bit ADC on related family members, an internal RC oscillator option, in-circuit serial programming (ICSP), and a watchdog timer with its own on-chip RC oscillator for reliable operation. The 20 MHz oscillator input yields a 200 ns instruction cycle, which is the headline performance metric for the PIC16F84AT-20 speed grade. The PIC16F84AT uses Microchip's mid-range 14-bit instruction word with a 15 special-function registers and a deep register file. Power consumption is managed via nanoWatt technology with idle and sleep modes. Operating voltage is 4.0 V to 5.5 V with commercial temperature grade 0C to +70C. The 18-SOIC package (0.300" / 7.5 mm wide body) exposes RA0-RA5 on PORTA and RB0-RB7 on PORTB for 13 bidirectional I/O lines, supporting TTL or CMOS signal levels. Typical applications include hobbyist and educational development boards (it is the de facto "first PIC" taught worldwide), appliance control boards, automotive interior lighting and small sensor interface nodes, industrial timer / sequencer modules, and battery-PM replacement of legacy PIC16C84 designs with in-system reprogrammability. The ICSP interface allows firmware updates in the field without removing the chip from the board. When laying out the PCB, place the 18-SOIC decoupling pads (0.1 uF ceramic VDD-to-VSS) within 5 mm of both VDD pins and ensure MCLR pull-up routing avoids coupling into the 4 MHz resonator traces. The "T" suffix denotes tape-and-reel packaging, and the "20" denotes the 20 MHz speed grade; engineers often confuse PIC16F84A with PIC16F84, but the 'A' adds nanoWatt and ICSP support, and 'T' only changes the shipping medium. This page synthesizes distributor pricing, same-family drop-in alternatives such as PIC16F84A-20/SO and PIC16F84A-20I/SO, and practical 18-SOIC design notes not aggregated on any single manufacturer or distributor page.

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PIC16F84AT-20/SS - 20MHz 8-bit Flash MCU 1.75KB SSOP-20
PIC16F84AT-20/SS

PIC16F84AT-20/SS - 20MHz 8-bit Flash MCU 1.75KB SSOP-20

The Microchip Technology PIC16F84AT-20/SS is an 8-bit CMOS Flash-based microcontroller in the PIC16F family, housed in a 20-pin SSOP (Shrink Small Outline Package) and specified for operation up to 20 MHz with a 4.0 V to 5.5 V supply. The 'T' suffix denotes a tape-and-reel packaging variant, while the -20 speed grade marks the 20 MHz maximum clock input and 200 ns minimum instruction cycle. An 8-bit microcontroller (MCU) is a single-chip computer with an 8-bit data path, on-chip program memory, RAM, I/O peripherals, and a CPU core. It belongs to the wider taxonomy: microcontroller -> embedded processor -> semiconductor -> integrated circuit. The PIC16F8X family uses a RISC Harvard architecture with only 35 single-word instructions, and all instructions execute in one instruction cycle except program branches which take two cycles - making it one of the simplest mid-range PIC families to learn and program. Key features include 1.75 KB (1K x 14) of self-programmable Flash program memory, 68 bytes of data RAM, 64 bytes of EEPROM data memory, 13 digital I/O pins, an 8-bit timer/counter (TMR0) with an 8-bit prescaler, a 16-bit timer/counter (TMR1), and a Watchdog Timer with its own on-chip RC oscillator. The part supports in-circuit serial programming (ICSP) via RB6 and RB7, enabling firmware updates after PCB assembly. Architecturally the PIC16F84A integrates a precision 4 MHz internal RC calibration word, a power-on reset, brown-out detect, power-up timer, and the proprietary nanoWatt Technology dynamic power-management features that lower quiescent current in sleep mode. The Harvard bus keeps program and data memory separate, allowing instruction fetch and data access in a single cycle. Typical applications include hobbyist and educational microcontroller projects, low-cost consumer appliances, automotive body controllers, sensor-interface front-ends, and legacy industrial-control retrofits where the PIC16F84A footprint has been qualified for years. The wide adoption also makes it a frequent BOM choice for educational kits and development boards. When designing with the PIC16F84AT-20/SS, note that only 13 of the 20 pins are usable as general-purpose I/O because three pins are required for the crystal/oscillator and one for MCLR reset; designers must also budget for the 5V-only supply, since the 'A' revision does not support the 2.0 V minimum of newer PIC16F1xx families. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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PIC16F84AT-20E/SO - 8-bit 20MHz 1.75KB Flash MCU | Microchip
PIC16F84AT-20E/SO

PIC16F84AT-20E/SO - 8-bit 20MHz 1.75KB Flash MCU | Microchip

The Microchip Technology PIC16F84AT-20E/SO is an 8-bit PIC16F family CMOS flash-based microcontroller delivering 20 MHz core performance, 1.75 KB (1K x 14) of on-chip Flash program memory, 68 bytes of RAM and 64 bytes of EEPROM data memory, in a surface-mount 18-SOIC (0.295", 7.50 mm width) package. The "T" suffix denotes tape-and-reel packaging for high-volume assembly, while "20E" designates a 20 MHz maximum clock and the extended (-40C to +125C) industrial temperature grade. With only 35 single-word instructions and a RISC-based Harvard architecture, it executes instructions in 200 ns at 20 MHz, making it well suited for latency-sensitive control loops. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory, working RAM, and programmable I/O peripherals. The PIC16F84A belongs to the mid-range PIC16 family, which sits between baseline PIC10/12/14 devices and enhanced PIC18 devices in Microchip's portfolio. Within the broader taxonomy, PIC microcontrollers are part of the 8-bit RISC microcontroller category, used widely in industrial, automotive, and consumer embedded applications where deterministic timing, low cost, and ease of programming outweigh the need for high MIPS. Key features include 13 digital I/O pins arranged on two ports (PORTA 5-bit, PORTB 8-bit), a 10-bit successive approximation ADC channel, four interrupt sources, a 14-bit instruction word, and an internal watchdog timer with on-chip RC oscillator. The device operates from 2.0 V to 5.5 V, includes in-circuit serial programming (ICSP) capability, and supports 1,000,000 typical erase/write cycles on its Flash program memory with greater than 40 years of data retention on EEPROM. Architecturally, the PIC16F84A uses a separate instruction and data bus (Harvard architecture) which allows instruction fetch and operand read to occur simultaneously. Its 8-bit data path, 14-bit program bus, and small footprint deliver deterministic execution suitable for real-time control, while a hardware multiplier is not present - multiplication is performed in software. Power management includes sleep mode with wake-up via interrupts, suitable for battery-powered and energy-conscious designs. Typical applications include industrial automation controllers, sensor interface modules, automotive body electronics, low-cost consumer appliances, LED lighting controllers, and remote-control transmitter/receiver platforms. The 18-SOIC package allows easy hand-prototyping and reflow soldering on standard 0.1"-pitch adapters. When designing with this part, observe the maximum clock-versus-supply-voltage curve: at 5.5 V the device supports the full 20 MHz; below 4.0 V, the maximum frequency must be derated. Always use decoupling capacitors of 0.1 uF and 10 uF near the VDD pin, and reserve the MCLR/VPP pin for in-circuit serial programming access. This page synthesizes distributor stock, parametric drop-in alternatives, and engineering design notes not found in the manufacturer datasheet alone.

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