Microcontroladores

Produtos (20.000+)

PIC16F636-E/P - 8-bit Flash MCU, 3.5KB, 12 I/O | Microchip
PIC16F636-E/P

PIC16F636-E/P - 8-bit Flash MCU, 3.5KB, 12 I/O | Microchip

The Microchip Technology PIC16F636-E/P is a CMOS Flash-based 8-bit PIC16 family microcontroller housed in a 14-pin PDIP (300 mil) through-hole package with extended operating temperature range. It integrates 3.5KB of Flash program memory (2K x 14 words), 128 bytes of RAM, and 256 bytes of EEPROM data memory, executes instructions at 20 MHz (200 ns instruction cycle) and operates from 4.5 V to 5.5 V. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory, working RAM, peripherals and I/O on one die. Within the broader taxonomy, the PIC16F636 belongs to the mid-range PIC16 family of 8-bit microcontrollers (RISC architecture), which itself sits under the 8-bit MCU hierarchy (8-bit MCU -> microcontroller -> embedded processor -> semiconductor). The mid-range core delivers deterministic single-cycle instruction execution and a compact 35-instruction set, allowing engineers to maintain code portability across the PIC16F-family while adding cryptographic, analog and timing peripherals. Key features of the PIC16F636 include 12 digital I/O pins, two analog comparators with programmable on-chip reference, a KeeLoq-compatible hardware cryptographic peripheral for secure remote-keyless-entry (RKE) transmitters, a programmable Low-Voltage Detect (PLVD) module, an Enhanced Universal Synchronous/Asynchronous Receiver/Transmitter (EUSART) and a Capture/Compare/PWM (CCP) module. Internal 8 MHz and 31 kHz oscillators plus an external oscillator option give the designer flexibility between low power and accurate timing. The device supports In-Circuit Serial Programming (ICSP) for in-field firmware updates and retains MPLAB ICD debugging compatibility across the family. Typical applications include automotive RKE transmitters and tire-pressure monitor encoders, security alarm keyfobs, wireless sensor transmitters, low-cost industrial control modules, and consumer white-goods user-interface boards. Its combination of cryptographic hardware and a small 14-pin footprint makes it especially common in battery-powered remote controls where PCB real estate is at a premium and security of the rolling code is mandatory. When designing with the PIC16F636, allocate one decoupling 100 nF ceramic capacitor adjacent to each VDD/VSS pin pair, route the MCLR pin through a 10 kohm pull-up for normal operation, and observe the maximum 20 MHz clock with a 5 V supply. EEPROM endurance is 100,000 erase/write cycles typical, so use it for infrequently-updated parameters such as calibration constants or rolling-code counters rather than high-write-rate logs. This page synthesizes distributor pricing and inventory, drop-in same-package alternatives, and practical design notes that complement the manufacturer datasheet to help engineers compare the PIC16F636-E/P against pin-compatible PIC16F630/PIC16F631 family members and PIC12F/PIC10F migrators.

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PIC16F636-E/SL - 8-bit MCU, 3.5KB Flash, 20MHz, 12 I/O | Microchip
PIC16F636-E/SL

PIC16F636-E/SL - 8-bit MCU, 3.5KB Flash, 20MHz, 12 I/O | Microchip

The Microchip Technology PIC16F636-E/SL is a CMOS Flash-based 8-bit PIC16 mid-range microcontroller featuring 3.5KB (2K x 14) of program memory, 128 bytes of RAM, and 256 bytes of EEPROM, housed in a 14-pin SOIC (SL) package. It executes instructions in 200 ns at 20 MHz and operates from 2.0 V to 5.5 V across the standard commercial range, with the -E suffix indicating the -40C to +125C extended industrial temperature grade. A PIC microcontroller is a Harvard-architecture RISC MCU that fetches instructions and data on separate buses, enabling single-cycle instruction execution and deterministic timing. The PIC16F636 belongs to the mid-range PIC16 family (PIC16 -> 8-bit MCU -> microcontroller -> semiconductor) and integrates a KeeLoq-compatible hardware cryptographic module, two analog comparators, a programmable Low-Voltage Detect (PLVD), an Enhanced Universal Synchronous/Asynchronous Receiver/Transmitter (EUSART), and an 8-channel 10-bit ADC. These peripherals position it as an integrated single-chip solution for embedded control. Key features include 12 I/O pins with individually programmable pull-ups and interrupt-on-change, 35 single-word instructions, internal 8 MHz and 31 kHz oscillators selectable via configuration bits, ICD (In-Circuit Debugger) support, and Flash program memory that is endurance-rated for 100,000 erase/write cycles. The 14-bit instruction word and 8-level hardware stack simplify code development while preserving real-time responsiveness. Typical applications include automotive remote keyless entry (RKE) systems that leverage the integrated KeeLoq encoder, security and alarm panels using the comparator and PLVD blocks, industrial sensor interfaces powered by the ADC and EUSART, low-cost appliance controls, and remote-control transmitters. With its extended temperature range, the -E variant is also suited to industrial-grade environments where commercial-grade parts are insufficient. When designing with this device, allocate one I/O pin for the MCLR/VDD programming interface and reserve adequate decoupling (100 nF + 10 uF) near VDD. The Flash memory supports self-programming under firmware control, enabling bootloader-based field updates. For timing-sensitive applications, configure the internal oscillator carefully to balance accuracy against power consumption, since the 31 kHz LF source is factory-calibrated but the 8 MHz HF source allows user tuning via the OSCTUNE register. This page synthesizes distributor stock levels, AEC-Q100 automotive qualification status, pin-compatible Microchip alternates, and practical design notes that are not collated in the manufacturer datasheet.

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PIC16F636-E/ST - 8-Bit MCU, 3.5KB Flash, 20MHz, 14-TSSOP | Microchip
PIC16F636-E/ST

PIC16F636-E/ST - 8-Bit MCU, 3.5KB Flash, 20MHz, 14-TSSOP | Microchip

The Microchip Technology PIC16F636-E/ST is an 8-bit Flash-based CMOS microcontroller in a 14-pin TSSOP package, built on Microchip's powerful PIC® MCU architecture. It integrates 3.5KB (2K x 14 words) of Flash program memory, 128 bytes of RAM, and 256 bytes of EEPROM data memory, with a maximum CPU clock of 20MHz across an extended 2.0V–5.5V supply range. The "E" suffix denotes the Extended temperature grade (-40°C to +125°C), making the part suitable for industrial and harsh-environment deployments. A microcontroller (MCU) is a single-chip computer that contains a CPU, program memory, working RAM, data EEPROM, and programmable peripherals. The PIC16F636 belongs to the PIC16F mid-range 8-bit family (PIC MCU -> 8-bit microcontroller -> embedded controller -> semiconductor). Compared with 32-bit Cortex-M parts, this 8-bit MCU offers deterministic single-cycle instruction execution (except branches), an ultra-small footprint, and rock-bottom unit cost for I/O-intensive, code-size-light designs such as remote controls, sensor interfaces, and KeeLoq-compatible secure encoders. Key features include: KeeLoq® compatible hardware Cryptographic Module for secure remote-keyless-entry (RKE) applications; a Programmable Low-Voltage Detect (PLVD); two on-chip analog comparators; a 10-bit ADC-free architecture optimized for digital I/O; and 11 general-purpose I/O pins with individually selectable weak pull-ups. The device executes all 35 single-word instructions in a single instruction cycle (200 ns at 20 MHz), and supports in-circuit serial programming (ICSP) plus ICD debugging. Architecturally, the PIC16F636 uses a Harvard RISC core with separate program and data buses. The 14-bit instruction word, hardware multiplier-free design, and 8-level hardware stack simplify firmware development while reducing RAM pressure. On-chip peripherals such as timers, comparators, and the cryptographic engine are accessed via a memory-mapped SFR block, eliminating the need for external glue logic. Typical applications include remote keyless entry (RKE) transmitters, security and alarm panels, simple sensor conditioning, low-cost motor control loops, and battery-powered IoT edge nodes. Per the Microchip product page, the PIC16F636 is recommended where the cryptographic KeeLoq encoder, low power, and small pin count are valued. Design tip: place a 0.1 µF decoupling capacitor within 5 mm of the VDD pin and reserve the MCLR/VPP pin for in-circuit programming access. If migrating to a newer silicon revision, Microchip recommends the PIC16F18323 as a newer-device alternative with more peripherals. This page synthesizes distributor pricing, drop-in TSSOP-14 alternatives, and practical design notes not found in the bare datasheet.

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PIC16F636-I/ML - 8-Bit MCU, 20MHz, KeeLoq, QFN-16 | Microchip
PIC16F636-I/ML

PIC16F636-I/ML - 8-Bit MCU, 20MHz, KeeLoq, QFN-16 | Microchip

The Microchip Technology PIC16F636-I/ML is an 8-bit CMOS Flash-based microcontroller with a 20 MHz maximum clock frequency, 3.5 KB (2K x 14 words) of Flash program memory and 256 bytes of EEPROM data memory, housed in a 16-pin QFN (4x4 mm) package. An 8-bit microcontroller is an integrated circuit that combines a processor core, program memory, data memory and peripherals on a single chip, sitting at the low end of the embedded-control hierarchy within the broader microcontroller and power/system-management ecosystem. The PIC16F636 belongs to Microchip's PIC16 family of mid-range RISC MCUs, executing one instruction per cycle except for branches, with only 35 single-word instructions to learn. Key features include a KeeLoq-compatible cryptographic module for secure remote-key and authentication designs, two analog comparators, a Programmable Low-Voltage Detect (PLVD) module, and 128 bytes of SRAM. The nanoWatt technology power-management feature set supports low average current in battery-powered products. Technically, the device uses Microchip's 14-bit wide instruction word Harvard architecture with a hardware stack, and peripheral set including a 16-bit timer, an 8-bit timer, and serial connectivity including SPI. The 20 MHz oscillator options cover internal and external clocking modes. Typical applications are secure remote keyless entry, RF authentication fobs, small appliance control, battery-operated sensor nodes, and industrial sub-systems that benefit from the on-chip crypto engine and comparators. Designers should budget the single 128-byte SRAM bank carefully, as KeeLoq routines consume RAM, and use the PLVD module to detect brown-out conditions before the flash write voltage floor is crossed. This page adds value beyond the manufacturer datasheet by combining distributor availability signals, drop-in alternatives, comparison tables and practical design notes in one place.

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PIC16F636-I/P - 8-bit Flash MCU, 3.5KB, KeeLoq, DIP-14 | Microchip
PIC16F636-I/P

PIC16F636-I/P - 8-bit Flash MCU, 3.5KB, KeeLoq, DIP-14 | Microchip

The Microchip Technology PIC16F636-I/P is an 8-bit CMOS Flash-based microcontroller in a 14-pin PDIP package, featuring 3.5KB (2K x 14) of Flash program memory, 128 bytes of RAM, and 256 bytes of EEPROM, operating at up to 20 MHz across a 4.5V to 5.5V supply range. An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data path that integrates a CPU, RAM, non-volatile program memory, peripherals and I/O on one die. The PIC16F family uses Microchip's Harvard RISC architecture, sitting in the broader hierarchy of microcontroller -> embedded processor -> semiconductor IC, and is widely used in cost-sensitive embedded applications where deterministic timing and low power are priorities. Key features of this part include 12 I/O pins, two analog comparators, a programmable Low-Voltage Detect (PLVD) module, an internal 8 MHz oscillator, an ICD (In-Circuit Debug) interface, and a KeeLoq-compatible hardware Cryptographic Module for secure rolling-code applications such as remote keyless entry. The device is supported by Microchip's MPLAB X IDE, XC8 compiler, and PICkit programmers, and offers 35 single-word instructions to minimize learning curve. The PIC16F636 integrates an 8-bit ALU with a 14-bit instruction word, an instruction pipeline, hardware interrupt controller, brown-out reset, power-on reset, watchdog timer with its own on-chip RC oscillator, and on-chip EEPROM emulation-friendly Flash. The architectural simplicity and deterministic instruction timing make the device well-suited to safety-conscious and interrupt-driven designs that demand predictable response. Typical applications include remote keyless entry (RKE) transmitters, security sensors, automotive body electronics, industrial control logic, low-end appliance control, battery-powered sensor nodes, and KeeLoq-compatible encoders. The internal oscillator plus ICD reduce BOM and board area, while the KeeLoq module delivers secure rolling-code transmission in a single chip. When designing with this device, note that the 4.5V to 5.5V supply range and 20 MHz clock limit low-voltage and high-throughput use cases. For 3.3V-only systems, consider the PIC16F636-I/SL (SOIC) variant or the lower-voltage PIC16F88x family. Place a 100 nF decoupling capacitor close to VDD, and tie MCLR through a pull-up if not driven by an external reset source.

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PIC16F636-I/SL - 8-Bit MCU, 3.5KB Flash, 20MHz | Microchip
PIC16F636-I/SL

PIC16F636-I/SL - 8-Bit MCU, 3.5KB Flash, 20MHz | Microchip

The Microchip PIC16F636-I/SL is an 8-bit CMOS Flash-based microcontroller built on the PIC16 architecture, delivering 20 MHz operation with 3.5KB (2K x 14) of Flash program memory and 256 bytes of EEPROM data memory, housed in a 14-pin SOIC (SL) package. It packs 35 single-word instructions, 128 bytes of RAM, 12 I/O lines, 2 comparators, a KeeLoq-compatible Cryptographic Module, and Programmable Low-Voltage Detect (PLVD) into one of the densest mid-range 14-pin PIC designs available. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, memory, and peripherals on one die. The PIC16F636 belongs to the broad PIC family -> mid-range 8-bit MCU category -> CMOS Flash-based MCU, distinguished from MIPS-, ARM-, or RISC-V-based MCUs by its Harvard RISC architecture and 14-bit instruction word. Its place in the system hierarchy is typically as the brain of small embedded control loops where deterministic instruction timing and low current draw (NanoWatt technology) matter more than raw CPU throughput. Key features include a 13-bit program counter capable of addressing 8K x 14 program space, DC-20 MHz clock speed (200 ns instruction cycle), 5 wake-up sources from Sleep, and an integrated KeeLoq-compatible Cryptographic Module for secure remote-keyless-entry applications. The 2 on-chip comparators with programmable hysteresis and dedicated reference simplify analog front-ends without external op-amps. Programmable code protection and ICD/debug support make it friendly for both secure production deployment and bench development. The PIC16F636 uses a Harvard architecture with separate program and data buses, allowing instruction fetch and operand read in a single cycle except for branches. Its NanoWatt technology yields sub-µA Sleep current with multiple wake-up options (interrupt-on-change, comparators, timers, watchdog), suited to battery-powered duty-cycled applications. Internal RC oscillator options (8 MHz, 32 kHz, 31 kHz LF) reduce BOM cost and board area by eliminating external crystals in non-precision timing designs. Typical applications include remote keyless entry (RKE) transmitters, security alarm panels, smoke and CO detectors, automotive body controllers, low-end remote sensors, and small appliance controls. The integrated KeeLoq cipher suits rolling-code secure wireless links where a discrete cryptographic IC would inflate BOM cost and PCB area. When designing with this part, verify the package derating at high temperatures and confirm that the chosen debugger (ICD3, PICkit 3/4, MPLAB Snap) header layout matches the MCLR/PGD/PGC pin assignments. The /SL suffix indicates industrial temperature grade (-40C to +85C) and SOIC-14 tube packaging. This page synthesizes distributor pricing, drop-in alternative MPNs, and practical design notes not found on any single manufacturer or distributor page.

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PIC16F636-I/ST - 8-bit MCU, 3.5KB Flash, 20MHz | Microchip
PIC16F636-I/ST

PIC16F636-I/ST - 8-bit MCU, 3.5KB Flash, 20MHz | Microchip

The Microchip Technology PIC16F636-I/ST is an 8-bit Flash-based CMOS microcontroller from the PIC16F636/639 family, featuring 3.5KB of Flash program memory, 128 bytes of RAM, and 256 bytes of EEPROM data memory in a 14-pin TSSOP (ST) package. It operates at up to 20MHz delivering 5 MIPS of throughput from a 4.5V to 5.5V supply, with 12 I/O pins and on-chip peripherals including a KeeLoq-compatible cryptographic module, a Programmable Low-Voltage Detect (PLVD) module, and two analog comparators. An 8-bit microcontroller (MCU) is a small, self-contained computer-on-a-chip that integrates a CPU, program memory, RAM, peripherals and I/O in a single package. The PIC mid-range architecture places the PIC16F636 inside the broader hierarchy: 8-bit microcontroller -> RISC microcontroller -> microcontroller -> embedded IC -> semiconductor device. Microchip's PIC mid-range family is widely adopted in low-power, cost-sensitive embedded designs because of its compact instruction set (35 single-word instructions), deterministic interrupt latency and an 8-level deep hardware stack. Key features include a factory-calibrated internal oscillator accurate to ±1%, a flash endurance of 100K cycles, and an operating temperature range of -40C to +85C for the industrial -I grade. The device supports in-circuit serial programming (ICSP) and in-circuit debugging, simplifying firmware bring-up. An integrated 256-byte EEPROM provides non-volatile data storage for calibration constants, security keys and rolling-code parameters without external memory, which is critical for KeeLoq-compatible remote-keyless-entry (RKE) and secure-access designs. The PIC16F636 uses Microchip's Harvard RISC architecture with a 14-bit wide instruction word and separate data paths for program and data memory, enabling single-cycle instruction execution except for branches. Its 5 MIPS performance is more than sufficient for timing-sensitive control loops and basic state-machine firmware. Two comparators with programmable on-chip references simplify analog front-ends such as battery voltage and current sensing. Typical applications include remote-keyless-entry (RKE) transmitters, secure-access key fobs, low-end security sensors, simple motor control, and battery-powered appliance control where small footprint, on-chip EEPROM and KeeLoq security provide decisive BOM savings. Designers value the part for sub-1 mA active current and long-life battery budgets. When designing with this part, mind the 14-pin TSSOP package thermal envelope in high-ambient enclosures and ensure the ICSP/ICD pins (RB6/RB7) are accessible for production programming. Pin assignments of the 14-TSSOP package must be verified against the device pinout table before PCB layout.

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PIC16F639-E/P - 8-bit MCU, 3.5KB Flash, KeeLoq Crypto | Microchip
PIC16F639-E/P

PIC16F639-E/P - 8-bit MCU, 3.5KB Flash, KeeLoq Crypto | Microchip

The Microchip Technology PIC16F639-E/P is a 20 MHz 8-bit CMOS Flash microcontroller with 3.5 KB (2K x 14) program memory, 128 bytes of RAM, and 256 bytes of EEPROM, housed in a 20-pin PDIP (0.300 inch, 7.62 mm) through-hole package. The -E suffix denotes the Extended temperature grade of -40C to +125C. The device integrates Microchip's PIC16 MCU core with 35 single-word instructions, two analog comparators, a programmable low-voltage detect (PLVD) block, and a KeeLoq-compatible hardware cryptographic module for secure bidirectional communications. A microcontroller (MCU) is a single-chip computer that integrates a CPU, non-volatile program memory, working RAM, and configurable peripheral I/O on one die. Within the broader taxonomy, an MCU belongs to the semiconductor family, then to integrated circuits (ICs), and more specifically to microcontrollers and embedded processors. The PIC16F series sits in Microchip's mid-range 8-bit line, between the baseline PIC10/12/16 families and the high-performance PIC18/dsPIC families. The headline features of the PIC16F639-E/P include the KeeLoq-compatible encryption/decryption engine for rolling-code remote keyless entry (RKE) and passive keyless entry (PKE), a three-channel Analog Front End (AFE) for 125 kHz transponder interfacing, MPLAB ICD 2/ICD 3 in-circuit debugging support, and NanoWatt Technology power management that drops quiescent current below 1 uA in sleep. The 11 GPIO pins support digital I/O, interrupt-on-change, and weak pull-ups, and the device includes an internal 8 MHz oscillator plus configurable clock options. Internally, the PIC16F639 uses a Harvard-architecture RISC core with separate program and data buses. The 14-bit instruction word delivers deterministic single-cycle execution for most opcodes, while the cryptographic module operates as an autonomous peripheral that consumes zero CPU cycles once the key and data registers are loaded. The on-board AFE, including an ASK/FSK demodulator and RSSI measurement, eliminates the external receiver IC traditionally required for inductive proximity systems. Typical applications include automotive remote keyless entry (RKE) transmitters, passive keyless entry (PKE) immobilizers, garage-door opener keyfobs, industrial RFID readers, secure access control fobs, and tamper-detection nodes that need a hardware root of trust. The Extended temperature grade also suits under-hood automotive and outdoor industrial installations. When designing in this part, allocate a 0.1 uF decoupling capacitor within 5 mm of the VDD pin, route the resonator pins to a quiet ground island, and reserve the AFE input pins (RA4/RA5) for the LC tank network specified in the datasheet typical application. Verify in-circuit serial programming (ICSP) connections against the Microchip ICD header pinout before finalizing PCB layout, and budget for code protection fuses if the rolling-code secret will be programmed at production. This page synthesizes distributor pricing, drop-in alternatives, and application guidance derived from the Microchip PIC16F639 datasheet family - data not consolidated in any single manufacturer document.

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PIC16F639-E/SO - 8-Bit PIC MCU w/ KeeLoq, 3.5KB Flash | Microchip
PIC16F639-E/SO

PIC16F639-E/SO - 8-Bit PIC MCU w/ KeeLoq, 3.5KB Flash | Microchip

The Microchip Technology PIC16F639-E/SO is a Flash-based, 8-bit PIC microcontroller featuring an integrated KeeLoq-compatible cryptographic module, a programmable low-voltage detector (PLVD), two analog comparators, and 256 bytes of EEPROM, housed in a 20-pin SOIC (SO) package. The device operates up to 20 MHz from a 2.0V to 5.5V supply and integrates 3.5KB (2K x 14) of Flash program memory plus 128 bytes of SRAM with 11 general-purpose I/O pins. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, RAM, non-volatile program memory, and peripheral interfaces on one die. Within the broader taxonomy it sits under microcontroller -> microcontroller IC -> integrated circuit -> semiconductor. The PIC16F639 specifically belongs to Microchip's PIC16 mid-range family, characterized by a 14-bit instruction set and only 35 single-word instructions to learn, making it a popular low-cost general-purpose MCU. Key features of the PIC16F639-E/SO include hardware KeeLoq cipher engine for secure rolling-code remote keyless entry applications, nanoWatt technology for low-power operation with several sleep modes, an internal 8 MHz oscillator, an enhanced USART, a capture/compare/PWM module, and a synchronous serial port that can be configured as either SPI or I2C master/slave. The device also integrates a 5-channel 10-bit ADC and dual comparators with programmable references. The PIC16F639 is engineered around Microchip's mid-range PIC16 core with a RISC Harvard architecture, providing deterministic single-cycle instruction execution except for program branches. The on-chip KeeLoq cryptographic module enables secure encrypted transmissions without external crypto ICs, while the 256-byte EEPROM is sized to securely store rolling-code transmission counters and encryption keys. Typical applications include secure remote keyless entry (RKE) transmitters, automotive immobilizers, passive anti-theft systems, secure RFID transceivers, low-cost authentication tokens, and industrial secure-access controllers. The cryptographic hardware makes the part especially valuable where encrypted RF transmission is required while still keeping the BOM small. When designing with the PIC16F639-E/SO, ensure the LF/RF front-end design follows the KeeLoq reference manual for EMI and antenna tuning. The SO package requires standard 20-SOIC PCB layout with adequate decoupling on VDD and a 100 nF bypass capacitor placed within 5 mm of the supply pin. This page synthesizes distributor pricing, drop-in package-compatible alternatives, and practical design notes not found in the manufacturer datasheet alone, optimized for engineers sourcing the PIC16F639-E/SO for secure low-power embedded designs.

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PIC16F639-E/SS - 8-bit 20MHz Flash MCU w/ KeeLoq Crypto | Microchip
PIC16F639-E/SS

PIC16F639-E/SS - 8-bit 20MHz Flash MCU w/ KeeLoq Crypto | Microchip

The Microchip Technology PIC16F639-E/SS is a Flash-based 8-bit CMOS microcontroller delivering 20 MHz CPU performance with 3.5 KB (2K x 14) of on-chip program memory and 256 bytes of RAM, integrated into a 20-pin SSOP package. The device integrates Microchip's KeeLoq-compatible cryptographic module, a Programmable Low-Voltage Detect (PLVD) block, two analog comparators, and nanoWatt power management peripherals, all in a compact surface-mount footprint. A PIC microcontroller is a Harvard-architecture, RISC-based 8-bit MCU that executes single-word instructions in a single instruction cycle (except branches), giving it deterministic throughput for embedded control tasks. PIC MCUs sit inside the broader hierarchy: microcontroller (MCU) -> embedded processor -> semiconductor IC. The PIC16F639 belongs to the PIC16 family, characterized by 14-bit instruction words, 35 single-word instructions, and on-chip Flash program memory. The 'F' suffix indicates Flash-based (reprogrammable in-circuit), and the '639 denotes a member of the LF PIC family that bundles analog peripherals with the KeeLoq security engine. Key features of the PIC16F639-E/SS include an integrated hardware KeeLoq-compatible cryptographic encoder for secure remote-keyless-entry (RKE) and rolling-code applications, a Programmable Low-Voltage Detect (PLVD) circuit, two on-chip analog comparators, an internal 8 MHz oscillator, and the nanoWatt power-management feature set with multiple sleep modes. The 11 I/O pins support digital I/O, analog comparator inputs, and peripheral functions. The device operates from 2.0 V to 3.6 V (per Microchipusa) and 4.5 V to 5.5 V (per Chipdig summary - two voltage ranges are reported by different sources; see _validation_note). Architecture-wise, the PIC16F639 employs a 14-bit instruction word with a 35-instruction RISC core, an 8-level hardware stack, and direct/indirect addressing modes. The on-chip Flash allows in-circuit serial programming (ICSP) via two pins, eliminating external programming hardware during prototyping. The KeeLoq-compatible cryptographic module performs rolling-code encoding in hardware, drastically reducing the firmware burden for secure transmitter designs. Typical applications include remote keyless entry (RKE) systems, automotive immobilizers, secure access controls, wireless security sensors, and low-power battery-operated remote controls. The 20-pin SSOP package and compact footprint also make the device suitable for small-form-factor industrial sensors and consumer electronics. Per Microchip, the -E temperature grade is the Extended (-40 C to +125 C) variant. When designing with this part, note that the PIC16F639 uses ICSP pins (RB6/RB7) which are shared with general-purpose I/O - allocate them carefully if the firmware requires in-circuit programming access. The KeeLoq-compatible encoder requires a manufacturer-specific transmission protocol and code-format configuration that must be licensed and programmed at production time. This page synthesizes distributor pricing, drop-in alternatives (same-brand PIC16F639-TI variants), and practical design notes not found in the manufacturer datasheet, helping engineers evaluate this device for secure low-power embedded designs.

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PIC16F639-I/P - 8-Bit MCU, 3.5KB Flash, KeeLoq Crypto, 20-DIP
PIC16F639-I/P

PIC16F639-I/P - 8-Bit MCU, 3.5KB Flash, KeeLoq Crypto, 20-DIP

The Microchip Technology PIC16F639-I/P is a KeeLoq-compatible 8-bit Flash microcontroller with 3.5KB (2K x 14) program memory, 128 bytes RAM, and an integrated 256-byte EEPROM data section, packaged in a 20-pin PDIP (through-hole, 0.300"/7.62mm). The device runs at 20MHz across an operating voltage range of 2.0V to 3.6V, drawing microamp-level currents in sleep thanks to Microchip's nanoWatt Technology. A microcontroller (MCU) is a single-chip computer containing a CPU core, program and data memory, programmable I/O peripherals, and on-board timers and communication interfaces. Within the broader taxonomy, a microcontroller is a type of integrated circuit > semiconductor device > electronic component. The PIC16F639 belongs to Microchip's PIC16 mid-range family, which sits between the PIC10/12 baseline family and the PIC18 enhanced family. Its distinguishing feature is a hardware cryptographic peripheral implementing the KeeLoq block cipher, plus two analog comparators and a Programmable Low-Voltage Detect (PLVD). Key features include 12 digital I/O pins, two comparators with programmable reference, hardware KEELOQ encoder, three timers (Timer0, Timer1, Timer2), an Enhanced Universal Synchronous/Asynchronous Receiver/Transmitter (EUSART), an MSSP module supporting SPI and I2C (master/slave), and nanoWatt power management with multiple idle/sleep modes. The device supports in-circuit serial programming (ICSP) and in-circuit debugging via two I/O lines. The PIC16F639 is built on a CMOS process with a 14-bit instruction word and a RISC-based 35-instruction core. The Harvard architecture separates program (Flash) and data (RAM) buses, enabling single-cycle instruction fetch except for branches. The cryptographic engine executes the KeeLoq rolling-code algorithm in hardware to offload secure remote-keyless-entry transmitters and similar hopping-code systems, freeing the CPU for housekeeping tasks. Typical applications include automotive remote keyless entry (RKE) transmitters, garage-door openers, secure access control fobs, wireless security sensors, and industrial remote-control units. The integrated crypto peripheral makes it a natural fit where anti-scan and anti-playback protection is required on a 3V coin-cell budget. When designing with the PIC16F639, note that the device is optimized for 3V (3.6V max) operation; 5V-tolerant designs should select a PIC16F88x or PIC16F1xxx counterpart. Decouple VDD with a 100nF ceramic capacitor placed within 5mm of the supply pin, and use the internal 4MHz or 31kHz LFINTOSC to minimize external component count. This page synthesizes distributor stock and pricing, parametric drop-in alternatives, and practical design notes that are not aggregated in the manufacturer datasheet alone, supporting faster sourcing and BOM decisions.

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PIC16F639-I/SS - 8-Bit 20MHz MCU w/ KeeLoq Crypto | Microchip
PIC16F639-I/SS

PIC16F639-I/SS - 8-Bit 20MHz MCU w/ KeeLoq Crypto | Microchip

The Microchip Technology PIC16F639-I/SS is a flash-based 8-bit CMOS PIC microcontroller with integrated KeeLoq-compatible cryptographic hardware, two analog comparators, a programmable Low-Voltage Detect (PLVD) module, and 3.5KB (2K x 14) of self-programmable Flash program memory, housed in a 20-pin SSOP package. It executes instructions at 20MHz, supports 2V to 5.5V operation, and is targeted at secure remote-keyless entry, RFID, and access-control applications where on-chip hardware encryption reduces BOM cost and firmware complexity. A microcontroller (MCU) is a single-chip computer containing a CPU, RAM, non-volatile program memory, and peripherals. The PIC16F639 belongs to Microchip's PIC16 mid-range family - one of the broadest 8-bit MCU architectures in the industry - with only 35 single-word instructions, a 14-bit instruction word, and a Harvard memory structure. It sits inside the larger PIC microcontroller -> 8-bit MCU -> microcontroller -> embedded processing IC -> semiconductor taxonomy. This 8-bit class is preferred for cost-sensitive, deterministic, low-power designs where 32-bit performance is unnecessary. Key features include 3.5KB Flash with self-write capability, 128 bytes SRAM, 256 bytes EEPROM, 12 I/O pins, an internal oscillator, two comparators with programmable references, a KeeLoq-compatible Cryptographic Peripheral (encryption/decryption engine), and a Programmable Low-Voltage Detect (PLVD) module. The on-chip hardware crypto accelerator lets OEMs implement rolling-code encoders/decoders for remote keyless entry (RKE) and passive anti-theft systems without external crypto ICs, reducing board area and BOM cost. Architecture-wise the device uses a RISC core with a 14-bit instruction set, an 8-level hardware stack, and direct/indirect addressing modes. The on-chip KeeLoq block performs block-cipher operations on a 64-bit plaintext with a 64-bit key using a non-linear feedback shift register; this engine is unique within the PIC16F6xx line. Power management includes nanoWatt technology with multiple sleep modes drawing nanoamp-range currents, plus a brown-out reset and PLVD to safeguard against low-battery data corruption in battery-powered remote fobs. Typical applications include remote keyless entry (RKE) transmitters and receivers, automotive immobilizers, RFID tags and readers, secure access-control keypads, anti-tamper sensors, and low-cost industrial remote-control encoders. It is also used in tire-pressure monitoring system (TPMS) sensor interface modules and secure authentication tokens. The integrated PLVD makes it well-suited for battery-voltage monitoring in 3V coin-cell powered transmitters. When designing with this part, ensure the KeeLoq security keys are stored in protected Flash regions and never exposed via debug. The internal oscillator typically provides ±1% accuracy at room temperature; for tighter RF timing budgets an external crystal is recommended on compatible package options. The PLVD threshold should be tuned to the battery chemistry (typically 2.0V-2.4V for CR2032 lithium coin cells). This page synthesizes distributor pricing, verified drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet alone - including KeeLoq key-management guidance and PLVD threshold tuning for coin-cell chemistries.

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PIC16F648A-E/ML - 8-Bit 20MHz MCU, 7KB Flash, 28-QFN | Microchip
PIC16F648A-E/ML

PIC16F648A-E/ML - 8-Bit 20MHz MCU, 7KB Flash, 28-QFN | Microchip

The Microchip Technology PIC16F648A-E/ML is an 8-bit flash-based CMOS microcontroller with a 20 MHz CPU clock, 7 KB (4K x 14) of program Flash, 256 bytes of RAM, and 256 bytes of EEPROM data memory, housed in a 28-pin QFN (6x6 mm) package with industrial-grade -40C to +125C operating range (E suffix). It features a 4 MHz internal oscillator, 16 digital I/O lines, a USART, a Capture/Compare/PWM module, two analog comparators, and a programmable voltage reference that targets analog and integrated-level embedded designs. A mid-range PIC16 microcontroller is a Harvard-architecture RISC device designed for deterministic real-time control in cost-sensitive applications. Within the broader taxonomy, this places the PIC16F648A under PIC microcontrollers -> 8-bit microcontrollers -> microcontrollers (MCU) -> embedded processors -> semiconductors. Microchip's mid-range PIC16 line is widely used as glue logic, sensor-interface, and simple-state-machine cores where 32-bit Cortex-M parts are over-spec, and it remains a workhorse for industrial, appliance, automotive aftermarket, and consumer products. Key features include 200 ns single-cycle instruction execution, 35 single-word instructions, only 14-bit wide opcode, an integrated nanoWatt power-management block for sleep/Idle modes, in-circuit serial programming (ICSP), and 100,000 erase/write cycle Flash endurance. The on-chip USART supports RS-232/RS-485 links without an external transceiver on short runs, while the two analog comparators with programmable reference eliminate external op-amps in sensor-conditioning front ends. The PIC16F648A uses a 14-bit instruction word with separate code and data buses, a hardware multiplier is absent, and arithmetic is performed by ADD/SUB and bit-rotation primitives - typical of the mid-range PIC family. The Harvard split between 14-bit instruction memory and 8-bit data memory delivers single-cycle instruction fetch, which is why mid-range PIC16 parts reach deterministic 200 ns instruction times at 20 MHz. The internal 4 MHz oscillator is factory-calibrated to within +/-1% and can be switched under firmware control, allowing the same firmware image to service crystal, resonator, and RC clock topologies without rework. Typical applications include appliance control boards, sensor-interface front ends, low-end RS-485 sensor nodes, automotive aftermarket modules, lighting controllers, and battery-powered instrumentation where the nanoWatt sleep modes extend operating life. The integrated analog comparators make the device especially attractive for battery monitoring, thermistor front ends, and zero-cross detection on mains-coupled inputs. When designing with this part, allocate at least one digital I/O pin for ICSP and reserve the RA7/OSC1 and RA6/OSC2 pins for either crystal or external clock, even if the internal 4 MHz oscillator is the default boot source. Brown-out reset (BOR) and watchdog timer (WDT) should both be enabled in safety-relevant firmware. Decouple VDD with a 100 nF ceramic within 5 mm of the pin and add a bulk 10 uF near the regulator output to keep the analog comparators free of digital switching transients. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet alone, giving engineers a single, citable reference for PIC16F648A-E/ML sourcing, selection, and PCB design-in decisions.

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PIC16F648A-E/SO - 8-bit 20MHz 7KB Flash MCU | Microchip
PIC16F648A-E/SO

PIC16F648A-E/SO - 8-bit 20MHz 7KB Flash MCU | Microchip

The Microchip PIC16F648A-E/SO is an 8-bit CMOS RISC Flash microcontroller with 20 MHz maximum clock speed, 7 KB (4K x 14) Flash program memory, 256 bytes RAM and 256 bytes EEPROM data memory, housed in an 18-pin SOIC (SO) package. It features 16 I/O pins, an integrated 4 MHz internal oscillator, a USART, a capture/compare/PWM module, two analog comparators, and a programmable voltage reference. An 8-bit microcontroller (MCU) is a compact single-chip computer that integrates a CPU, program memory, RAM, peripherals, and I/O on one die. Microchip's PIC16 family uses a RISC-based Harvard architecture with only 35 single-word instructions, which simplifies firmware development and accelerates time-to-market for embedded designs. Within the broader hierarchy, the PIC16F648A is a mid-range 8-bit MCU positioned between base-line PIC10/12/16 devices and enhanced PIC18 8-bit families, well suited to cost-sensitive mixed-signal and control applications. Key features include 200 ns instruction execution time, 10-bit ADC with 8 channels, two 8-bit timers plus one 16-bit timer, an internal 4 MHz oscillator, an analog comparator module with programmable reference, and nanoWatt technology for low-power sleep modes. The device supports 4.5 V to 5.5 V supply operation with industrial-grade -40 °C to +125 °C extended temperature range (denoted by the "E" suffix), making it appropriate for harsh-environment designs. The PIC16F648A is upwards code-compatible with the PIC16F628, PIC16C62XA, PIC16C5X and PIC12CXXX devices, simplifying firmware reuse and migration. Per the Microchip product page, its combination of internal oscillator, USART, CCP and analog peripherals targets mixed-signal applications where multiple discrete ICs would otherwise be required. Typical applications include automotive body and lighting controllers, industrial sensor interfaces, appliance control boards, security and access systems, and consumer electronics such as battery chargers and small appliances. The internal oscillator eliminates an external crystal in many designs, reducing BOM cost. When designing with the PIC16F648A-E/SO, note that the "E" suffix denotes the extended temperature grade (-40 °C to +125 °C). For lower-cost commercial-grade designs operating 0 °C to +70 °C or industrial-grade -40 °C to +85 °C, select the PIC16F648A-I/SO variant with identical pinout. This page synthesizes distributor pricing, same-package drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, helping engineers select and source the PIC16F648A-E/SO with confidence.

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PIC16F648A-E/SS - 8-Bit 20MHz MCU 7KB Flash SSOP-20 | Microchip
PIC16F648A-E/SS

PIC16F648A-E/SS - 8-Bit 20MHz MCU 7KB Flash SSOP-20 | Microchip

The Microchip PIC16F648A-E/SS is an 8-bit CMOS Flash-based microcontroller from the PIC16 family with 7KB (4K x 14) of program memory, 20MHz maximum clock speed, and a 20-pin SSOP package. It integrates 256 bytes of EEPROM data memory, 256 bytes of RAM, and a rich set of peripherals including a USART, one capture/compare/PWM (CCP) module, two analog comparators, and a programmable voltage reference - all inside a 20-pin SSOP footprint. An 8-bit microcontroller is a small, self-contained computing element that integrates a CPU, non-volatile program memory, working RAM, and I/O peripherals on a single silicon die; it sits within the broader category of microcontrollers (MCU), which in turn belongs to embedded processors and digital semiconductors. The PIC architecture uses a Harvard RISC core with only 35 single-word instructions and 200 ns instruction execution at 20 MHz, which simplifies firmware development while delivering deterministic timing for embedded control loops. Key features include an internal 4 MHz oscillator that allows the MCU to operate without an external crystal, a wide 2.0V-5.5V supply range with nanoWatt power management for sleep currents under 1 uA typical, an active-high MCLR reset, and in-circuit serial programming (ICSP) via two pins. The device supports up to 16 digital I/O lines depending on package, 10-bit ADC alternatives from the family, and brown-out reset plus power-on reset for reliable start-up. The PIC16F648A is built on Microchip's enhanced mid-range 14-bit instruction set, is upwards compatible with the PIC16F628, PIC16C62XA, PIC16C5X, and PIC12CXXX devices, and uses self-programmable Flash memory for field updates. Its analog resources - two comparators plus a programmable voltage reference - make it equally comfortable in digital glue logic or mixed-signal front-end roles. Typical applications include automotive body and interior modules, white goods and appliance control, industrial sensor conditioning, security and access peripherals, and general-purpose remote-control or sensor nodes where a small, low-power MCU with on-chip EEPROM and analog is required. Designers choose this part when the application needs more analog capability than a basic PIC16F627/628, but does not require the larger memories of PIC18 devices. When laying out a board, place a 100 nF decoupling capacitor as close as possible to VDD, keep the ICSP lines isolated from high-current traces, and respect the MCLR pull-up design rule for reliable in-system programming. For battery-backed designs, switch to the 4 MHz internal oscillator and use Sleep mode with nanoWatt features to drop average current well below 1 mA. This page consolidates distributor pricing as of 2026-09-21, drop-in pin-compatible alternatives from Microchip and competitor makers, and design notes drawn from Microchip application literature that are not aggregated on a single distributor page.

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PIC16F648A-I/ML - 8-Bit 20MHz MCU 7KB Flash 28-QFN | Microchip
PIC16F648A-I/ML

PIC16F648A-I/ML - 8-Bit 20MHz MCU 7KB Flash 28-QFN | Microchip

The Microchip Technology PIC16F648A-I/ML is a PIC16F-series 8-bit Flash CMOS microcontroller built around an enhanced mid-range PIC core that executes one instruction every 200 ns (5 MIPS at 20 MHz). It integrates 7 KB (4K x 14) of self-programmable Flash program memory, 256 bytes of EEPROM data memory and 256 bytes of SRAM, packaged in a 28-lead QFN (6 x 6 mm, ML suffix). A microcontroller (MCU) is a single-chip computer that combines a CPU, non-volatile program memory, working RAM, and a rich set of on-chip peripherals. Within Microchip's taxonomy, the PIC16F648A belongs to the enhanced mid-range PIC16F family, which sits between the baseline PIC10/12/16/17 families and the high-performance PIC18/dsPIC33 families. It is widely used for cost-sensitive 8-bit embedded control. Key features include an internal 4 MHz precision oscillator (selectable to 32 kHz LF mode), a 10-bit ADC with 8 channels, two analog comparators with a programmable voltage reference, one Capture/Compare/PWM (CCP) module, a USART for asynchronous or synchronous serial communication, and a nanoWatt power-management set with multiple sleep/idle modes. The device operates from 2.0 V to 5.5 V across -40 C to +85 C industrial temperatures. The architecture uses a 14-bit instruction word and a 16-level hardware stack, retaining the 35-instruction PIC16 instruction set for source compatibility with the legacy PIC16F628, PIC16C62XA, PIC16C5X and PIC12CXXX devices. The integrated brown-out reset (BOR), power-on reset (POR), watchdog timer and programmable code protection simplify safety and reliability design. Typical applications include remote controls, sensor signal conditioning, automotive body and interior subsystems, white goods and small appliances, and battery-powered or hand-held instruments where low-power nanoWatt operation, integrated analog and a small QFN footprint reduce the bill of materials. The newer Microchip PIC16F18444 is recommended for new designs. When designing with the PIC16F648A-I/ML, place a 100 nF decoupling capacitor close to VDD and add a bulk capacitor on the MCLR/VDD rail. Leave the ICSP/ICD pins (RB6, RB7) accessible for in-circuit debugging if firmware development is planned. This page synthesises distributor pricing, verified drop-in alternatives within the PIC16 family, and practical design notes not consolidated on the manufacturer product page, helping engineers shorten selection and qualification time.

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PIC16F648A-I/P - 8-bit 20MHz 7KB FLASH MCU 18-PDIP | Microchip
PIC16F648A-I/P

PIC16F648A-I/P - 8-bit 20MHz 7KB FLASH MCU 18-PDIP | Microchip

The Microchip PIC16F648A-I/P is an 8-bit Flash-based CMOS microcontroller featuring a 20 MHz CPU clock, 7 KB of Flash program memory (4K x 14 words), 256 bytes of RAM, and 256 bytes of EEPROM data memory, housed in an 18-pin PDIP (P) through-hole package. It is industrial-grade (I suffix, -40C to +85C), operates from 2.0 V to 5.5 V, and integrates a 4 MHz internal oscillator, a USART, one capture/compare/PWM module, two analog comparators with a programmable voltage reference, and a 10-bit ADC. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory (Flash/ROM), data memory (RAM), and peripherals on one die. PIC microcontrollers use a Harvard RISC architecture with a small, fixed instruction set, executing one instruction per instruction cycle (4 clock cycles), which makes them predictable and easy to program in C or assembly. The PIC16F648A belongs to the mid-range PIC16F family, sitting between PIC12C/PIC16C5X baseline parts and PIC18F enhanced parts in Microchip's product hierarchy. Key features include 35 single-word instructions, 200 ns instruction execution at 20 MHz, 16 digital I/O pins, two 8-bit timers and one 16-bit timer, ICD (In-Circuit Debugger) support, nanoWatt power management for sleep currents below 1 uA typical, and code protection with both read and write protection bits. The on-chip peripherals (USART, CCP, comparators, ADC, PWM) eliminate external glue logic in many designs. Typical applications include appliance control panels, automotive body controllers, industrial sensor interfaces, battery chargers, small motor control, remote keyless entry receivers, smart thermostats, and consumer device user interfaces. The PIC16F648A is fully static and supports wide operating conditions, making it suitable for harsh environments. When designing, ensure the ICSP/ICD pins (RB6, RB7) are accessible for in-circuit programming and debugging. The internal 4 MHz oscillator is accurate to ±1% typical, which is sufficient for UART baud rates at common frequencies. Use decoupling capacitors of 100 nF and 10 uF close to VDD. A newer device PIC16F18444 is recommended by Microchip as a migration path; however, the PIC16F648A-I/P remains active for legacy designs. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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PIC16F648A-I/SO - 8-Bit 20MHz 7KB Flash MCU 18-SOIC | Microchip
PIC16F648A-I/SO

PIC16F648A-I/SO - 8-Bit 20MHz 7KB Flash MCU 18-SOIC | Microchip

The Microchip PIC16F648A-I/SO is a PIC16 family 8-bit FLASH-based CMOS microcontroller delivering 20 MHz performance with 200 ns instruction execution, packaged in a 18-pin Small Outline IC (SOIC). It integrates 7KB (4K x 14) of program Flash, 256 bytes of RAM, and 256 bytes of EEPROM data memory, providing a balanced set of on-chip resources for cost-sensitive embedded designs. An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data path; the PIC16 family uses Microchip's RISC-based PIC architecture, which sits at the entry level of the MCU hierarchy (8-bit MCU -> microcontroller -> embedded processor -> semiconductor). Within the system, MCUs execute firmware that reads sensor inputs, drives actuators, and manages communication peripherals. The PIC16F648A-I/SO targets mid-volume embedded applications where deterministic instruction timing, code protection, and integrated analog peripherals reduce Bill-of-Materials cost. Key features of the PIC16F648A include a 4 MHz internal oscillator (selectable, no crystal required for many designs), a hardware Universal Synchronous/Asynchronous Receiver Transmitter (USART) for serial communication, a Capture/Compare/PWM (CCP) module, two analog comparators with a programmable voltage reference, and up to 16 I/O pins. The device operates across 3.0 V to 5.5 V, suiting both battery and regulated-rail designs, and exposes nanoWatt Technology power-management modes for sleep current as low as the manufacturer's standby figures. The PIC architecture uses a 14-bit wide instruction word optimised for compact code; the 35 single-word instruction set simplifies assembly programming while C compilers remain fully supported. On-chip in-circuit serial programming (ICSP) and In-Circuit Debug (ICD) are accessible via dedicated pins, enabling rapid prototyping without removal of the device from the target board. Code protection and a robust watchdog timer improve field reliability versus discrete logic implementations. Typical applications span automotive subsystems, industrial appliances, small consumer products, and remote control / sensor interface nodes. Designers choose this MCU when they need an integrated analog front-end (comparators + reference) plus a USART on fewer than 20 pins, reducing both component count and PCB area. When designing with the PIC16F648A-I/SO, confirm the upper oscillator-speed requirement against the voltage rail: at 20 MHz the manufacturer recommends 4.5 V to 5.5 V, while 3.0 V to 5.5 V supports lower frequencies. Provide adequate decoupling (100 nF + bulk) on VDD and keep ICSP/ICD traces short for clean programming. This page synthesises distributor pricing, drop-in alternatives, and practical design notes not consolidated in any single manufacturer datasheet.

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PIC16F648A-I/SS - 8-bit MCU, 7KB Flash, 20MHz | Microchip
PIC16F648A-I/SS

PIC16F648A-I/SS - 8-bit MCU, 7KB Flash, 20MHz | Microchip

The Microchip Technology PIC16F648A-I/SS is an 8-bit Flash-based CMOS microcontroller from the PIC16 family, delivering 20 MHz (200 ns instruction cycle) performance with 7 KB (4K x 14) of program memory, 256 bytes RAM, and 256 bytes EEPROM in a 20-pin SSOP package. It is the automotive/industrial-rated -I variant of the PIC16F648A family with extended temperature range. A microcontroller (MCU) is a single-chip computer containing a CPU, RAM, non-volatile program memory, and peripheral interfaces on one integrated die. The PIC16F648A belongs to Microchip's mid-range PIC16 family, positioned above the baseline PIC12/PIC16 baseline family and below the enhanced PIC18 family, and is part of the broader 8-bit microcontroller category within the embedded microcontroller market. Key features of the PIC16F648A-I/SS include a 4 MHz internal oscillator (eliminating external crystal cost in many designs), an integrated USART for serial communications, a capture/compare/PWM (CCP) module, two analog comparators with a programmable voltage reference, a 10-bit ADC, nanoWatt power management, and 16 I/O pins. The device supports in-circuit serial programming (ICSP) for field updates. The PIC16F648A-I/SS uses Microchip's modified Harvard RISC architecture with a 14-bit instruction word and 35 single-word instructions, making it easy to learn and program. The nanoWatt technology provides multiple power-saving modes (RUN, IDLE, SLEEP) with wake-on-interrupt capability, allowing the device to consume microamp-level current in sleep - ideal for battery-powered and energy-harvesting applications. Typical applications include automotive body controllers, industrial appliance control, sensor signal conditioning with on-chip comparators, low-power remote sensors, small motor control via PWM/CCP, consumer white goods, and security system I/O expanders. The internal oscillator and integrated analog peripherals reduce BOM cost for cost-sensitive designs. When designing with this device, ensure your C compiler or assembler targets the mid-range PIC16 core. The 20-pin SSOP footprint is hand-solderable and supports standard prototyping, while the -I suffix guarantees the industrial -40C to +85C operating temperature range. This page synthesizes distributor stock data, drop-in compatible alternatives, and engineering guidance not found in the standalone Microchip datasheet - helping engineers verify compatibility, sourcing, and design trade-offs in a single view.

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PIC16F648AT-E/ML - 8-bit 20MHz 7KB Flash MCU 28-QFN | Microchip
PIC16F648AT-E/ML

PIC16F648AT-E/ML - 8-bit 20MHz 7KB Flash MCU 28-QFN | Microchip

The Microchip Technology PIC16F648AT-E/ML is an 8-bit Flash-based CMOS microcontroller from the PIC16F family, featuring a 20MHz internal/external oscillator, 7KB (4K x 14) of Flash program memory, 256 bytes of RAM, and 256 bytes of EEPROM data memory, housed in a 28-pin QFN (6x6 mm) package with exposed thermal pad. It operates from 4.0V to 5.5V supply and integrates a 10-bit ADC, two analog comparators, a USART module, and nanoWatt power-management technology for low-power sleep modes. An 8-bit microcontroller (MCU) is a small computing system on a single chip combining a CPU, memory, and I/O peripherals. It belongs to the hierarchy: microcontroller -> embedded processor -> semiconductor -> integrated circuit. The PIC16F family specifically uses a RISC instruction set with only 35 single-word instructions, providing 200ns instruction execution at 20MHz and 8-level deep hardware stack for fast context switching in real-time control loops. Key features of the PIC16F648AT-E/ML include 16 I/O pins with individually configurable pull-ups, 2x8-bit timer/counters, 1x16-bit timer/counter, PWM output, ICSP in-circuit serial programming, and an extended (-40C to +125C) operating temperature range. The 28-QFN package with exposed thermal pad provides 31.6 C/W thermal resistance, enabling compact PCB designs in space-constrained industrial and consumer products. Architecturally, the PIC16F648AT-E/ML uses a Harvard RISC core with separate program and data buses, providing deterministic instruction timing critical for real-time control. The nanoWatt power-management block offers multiple low-power modes (sleep, watchdog timer, internal oscillator) that reduce quiescent current to sub-microamp levels, making the part suitable for battery-powered applications. A 4-wire ICSP interface allows field reprogrammability, and the 1,000,000 erase/write cycle endurance on Flash supports firmware updates in deployed products. Typical applications include industrial control, automotive body electronics (non-safety), home appliances, remote sensors, lighting controllers, motor control, and low-power wireless sensor nodes. The combination of nanoWatt sleep currents and fast wake-up time makes it well-suited for battery- or energy-harvesting powered designs where quiescent power dominates the energy budget. When designing with the PIC16F648AT-E/ML, ensure the exposed thermal pad is soldered to the PCB ground plane for proper thermal dissipation. Decouple VDD with a 100nF ceramic capacitor placed within 5mm of the supply pin, and add a 10uF bulk capacitor for motor or relay loads. Use MPLAB X IDE with XC8 compiler for firmware development; ICD debugger headers are required for in-circuit debugging. This page synthesizes distributor pricing, drop-in alternative cross-references, and practical design notes that extend the manufacturer datasheet with engineering guidance for sourcing and PCB integration.

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PIC16F648AT-E/SO - 8-Bit 20MHz MCU 7KB Flash 18-SOIC | Microchip
PIC16F648AT-E/SO

PIC16F648AT-E/SO - 8-Bit 20MHz MCU 7KB Flash 18-SOIC | Microchip

The Microchip Technology PIC16F648AT-E/SO is an 8-bit PIC16-family RISC microcontroller running at up to 20 MHz with 7 KB (4K x 14) of Flash program memory, 256 bytes of RAM, and 256 bytes of EEPROM, housed in a 18-pin SOIC package. It is built on Microchip's enhanced mid-range core, executes instructions in 200 ns, and offers 16 I/O pins, two analog comparators with a programmable voltage reference, one Capture/Compare/PWM (CCP) module, a USART, and an internal 4 MHz oscillator. The "T" suffix indicates tape-and-reel packaging and the "E" denotes the extended temperature grade. A PIC16F-series microcontroller is a compact, low-power 8-bit CMOS RISC MCU built around a Harvard architecture and an instruction set of only 35 single-word instructions, enabling rapid development and easy code migration across the PIC10/12/14/16/18 families. PIC MCUs integrate Flash program memory, data EEPROM, and rich on-chip peripherals (timers, ADC, comparators, PWM, USART) onto a single die, reducing BOM cost and PCB area in cost-sensitive embedded designs. The PIC16F648A sits in the mid-range PIC16 tier, sharing the PIC16F628A's footprint and offering double the program memory. Key features include 4 MHz internal RC oscillator with software-selectable frequencies, two comparators with programmable reference, 10-bit resolution PWM, brown-out detect (BOD), and nanoWatt power management for sleep currents in the microamp range. The wide 2.0 V to 5.5 V supply range supports both 3.3 V and 5 V designs, and 16 GPIO pins provide ample interface flexibility for sensors, pushbuttons, and small displays. The PIC16F648A architecture combines a 14-bit wide instruction word with a separate 8-bit data path, allowing single-cycle ALU operations and direct bit-manipulation on any register. The Flash memory supports in-circuit serial programming (ICSP) via two pins (RB6/ICSPCLK and RB7/ICSPDAT), enabling firmware updates without removing the MCU from the board. The on-chip USART and CCP module together cover most asynchronous serial and PWM needs without external components. Typical applications include white-goods and appliance controllers, HVAC remote panels, low-end sensor node transmitters, automotive body electronics (cluster indicators, mirror controllers), industrial timers and counters, and battery-powered instrument front-ends. The integrated comparators and PWM are particularly useful for closed-loop fan control, light dimmers, and simple motor drivers. When designing with this device, mind the maximum 20 MHz clock at 4.5 V to 5.5 V (the part is specified to 4 MHz below 4.5 V) and provide a 100 nF decoupling capacitor directly between VDD and VSS, ideally placed within 3 mm of the package pins. The brown-out reset (BOR) threshold should be configured to match the minimum regulator output voltage to prevent Flash corruption during supply dips. This page synthesizes real distributor pricing, same-family drop-in alternatives, and practical design notes not found in the manufacturer datasheet, giving procurement and firmware engineers a single decision-ready reference.

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PIC16F648AT-E/SS - 8-Bit PIC MCU, 7KB Flash, 20MHz | Microchip
PIC16F648AT-E/SS

PIC16F648AT-E/SS - 8-Bit PIC MCU, 7KB Flash, 20MHz | Microchip

The Microchip Technology PIC16F648AT-E/SS is an 8-bit CMOS flash-based microcontroller built on the PIC16 enhanced mid-range core, packaged in a 20-pin SSOP (5.30 mm body width, 0.65 mm pitch). It integrates 7 KB of Flash program memory (4K x 14 words), 256 bytes of SRAM, and 256 bytes of EEPROM data memory, and executes instructions at 200 ns per cycle from a 20 MHz oscillator. The part runs from 2.0 V to 5.5 V across the -40C to +125C extended industrial temperature range (E suffix). What is a PIC16 mid-range 8-bit MCU? An 8-bit microcontroller is a single-chip computer whose arithmetic logic unit and data path are 8 bits wide, executing one byte per instruction cycle. The PIC16 enhanced mid-range family, of which the PIC16F648A is a member, adds 35 single-word instructions, hardware-accelerated interrupt handling, an internal 4 MHz oscillator, nanoWatt power management, and upward code compatibility with the PIC16F628, PIC16C62XA, PIC16C5X, and PIC12CXXX devices. It belongs to the broader hierarchy microcontroller -> MCU -> embedded controller -> semiconductor IC. Key features include a USART with RS-485/RS-232 support, an enhanced CCP module, two 8-bit timers plus one 16-bit timer, a 10-bit ADC with up to 8 channels, and nanoWatt sleep modes that draw single-digit microamps. The dual internal oscillator (4 MHz / 37 kHz) eliminates external crystals in many cost-sensitive designs. Two hardware PWM channels, an analog comparator, and an internal voltage reference round out the analog/mixed-signal peripherals. The USART and 10-bit ADC combinations support sensor-bridge, motor-control-loop, and human-interface link designs. Typical applications include industrial sensor nodes, low-end motor control, battery chargers, automotive body electronics (non-safety), consumer appliance user interfaces, and remote controls where cost, EEPROM data logging, and small SSOP footprints outweigh the need for a 32-bit core. Engineers select the PIC16F648A family when code density and ease of migration from older PIC16C/PIC12 designs matter, because the same MPLAB X toolchain, XC8 compiler, and programmer/debugger ecosystem (ICD/PICkit) is reused across the family. When designing with this part, leave RA5/MCLR/VPP accessible for in-circuit serial programming. Add a 100 nF decoupling capacitor adjacent to VDD and a 10 kohm pull-up on MCLR for clean resets. For low-power designs, take advantage of the nanoWatt sleep modes that drop current below 1 uA when peripherals are gated off. The 'T' suffix denotes tape-and-reel packaging, and the 'E' suffix denotes the -40C to +125C extended temperature grade. This page synthesizes distributor pricing, drop-in same-package alternatives drawn from Microchip's cross-reference data, and practical engineering notes not consolidated in the manufacturer datasheet. Engineers evaluating an MCU swap can use the comparison_table below to confirm Flash, RAM, EEPROM, and pin count compatibility before committing to a PCB re-spin.

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PIC16F648AT-I/ML - 8-Bit 20MHz MCU 7KB Flash 28-QFN | Microchip
PIC16F648AT-I/ML

PIC16F648AT-I/ML - 8-Bit 20MHz MCU 7KB Flash 28-QFN | Microchip

The Microchip Technology PIC16F648AT-I/ML is a powerful yet easy-to-program CMOS FLASH-based 8-bit microcontroller in the PIC16F family, delivering 20 MHz (200 ns instruction cycle) performance in a 28-pin QFN (6x6 mm) package with exposed thermal pad. According to the manufacturer datasheet, the device integrates 7 KB (4K x 14 words) of Flash program memory, 256 bytes of SRAM, and 256 bytes of EEPROM data memory in a RISC-based architecture executing 35 single-word instructions. A PIC microcontroller (Peripheral Interface Controller) is a Harvard-architecture 8-bit RISC MCU family originally developed by General Instrument and popularised by Microchip Technology. PIC MCUs belong to the broader category of microcontrollers -> embedded microcontrollers -> microprocessors -> digital ICs -> semiconductors, and they are widely adopted because of their compact instruction set, deterministic interrupt latency, low power consumption, and rich peripheral integration in small pin-count packages. Key features of the PIC16F648AT-I/ML include an internal 4 MHz high-precision oscillator (factory calibrated to within 1%), an internal 37 kHz low-power oscillator for sleep operation, two 8-bit timers (TMR0/TMR2) plus one 16-bit timer (TMR1), a 10-bit ADC with 8 channels, a USART module with EUART capability, an analog comparator, a Capture/Compare/PWM (CCP) module, and 16 digital I/O pins. The device operates across 4.0 V to 5.5 V supply voltage, drawing less than 3.0 mA at 5 V/20 MHz and typically 0.1 uA in sleep mode. The 28-QFN exposed-pad package enables compact PCB layouts with thermal resistance of approximately 80 C/W, while the flash-based program memory supports in-circuit serial programming (ICSP) and in-circuit debugging via two I/O pins. The CIP (Core Independent Peripheral) functionality, including the on-board comparator and PWM, allows the part to handle complex sequencing without CPU intervention. Typical applications include remote controls, security alarm panels, small appliances, sensor interfaces, automotive interior lighting modules, low-end motor control, and battery-powered instrumentation. Designers select the PIC16F648AT-I/ML when they need more memory and richer peripherals than the PIC16F627A while retaining code compatibility with the PIC16F628 and PIC16C62XA legacy families. When designing with this device, provide a 100 nF decoupling capacitor close to VDD and consider using the internal oscillator to save two external crystal pins. For applications that demand lower power, the LF variant (PIC16LF648A-I/ML) operates down to 2.0 V. Note that Microchip recommends migrating new designs to the newer PIC16F18444 family for ongoing production. This page synthesises distributor pricing, drop-in same-package alternatives, practical design notes, and a parameter comparison matrix not found in the manufacturer datasheet, enabling faster sourcing and design decisions for engineers working on mid-range 8-bit embedded designs.

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PIC16F676-E/P - 8-Bit 20MHz Flash MCU | Microchip Technology
PIC16F676-E/P

PIC16F676-E/P - 8-Bit 20MHz Flash MCU | Microchip Technology

Microchip Technology PIC16F676-E/P is an 8-bit CMOS flash-based microcontroller with a 20 MHz maximum clock speed, 1.75 KB of program Flash, 64 bytes of RAM, and a 14-pin PDIP package. It executes instructions in as little as 200 nanoseconds and uses a compact 35-instruction set. A PIC microcontroller is a programmable system-on-chip category combining a CPU, program memory, data memory, I/O ports, and integrated peripherals. The PIC16F676 belongs to the PIC16 mid-range family, where a small instruction set, dedicated I/O, and low component count make it useful for control-oriented products that do not require a high-performance 32-bit processor. The PIC16F676-E/P provides 1.75 KB, or 1K by 14 words, of flash program memory and 64 bytes of RAM for firmware and working variables. Its key differentiator is an integrated 10-bit analog-to-digital converter with 8 channels. Additional control resources include digital I/O, comparators, a watchdog timer, and an internal oscillator, allowing compact designs without requiring several external support components. Microchip describes the PIC16F630 and PIC16F676 as identical except for the 10-bit A/D converter, which is present on the PIC16F676. The 200 ns instruction execution capability supports responsive control loops, while the 35 single-word instructions can reduce firmware size. The -E/P ordering identifies the extended-temperaturegrade device supplied in a 14-pin PDIP package. Typical uses include compact temperature controllers, simple motor and relay controllers, LED status panels, battery-operated instruments, digital timers, and analog sensing systems. The integrated ADC is particularly useful when the design must monitor several analog inputs while retaining a small pin count and straightforward embedded-control workflow. When laying out a design, begin with the PIC16F676-E/P pinout and preserve the 14-pin PDIP footprint rather than assuming compatibility with a 20-pin or surface-mount variant. Confirm oscillator, programming, reset, analog-input, and supply connections against the manufacturer data sheet. The comparator and ADC share analog resources, so their configuration and multiplexing must be checked for the intended channel sequence. This page combines manufacturer specifications, verified distributor listings, package details, strict drop-in alternatives, and practical design guidance. It is intended to help engineers identify the correct grade and package, compare compatible replacements, and move directly from component selection to PCB and firmware validation.

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