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AT89S52-24PU - 8-bit 8051 MCU, 24MHz, 8KB Flash, 40-PDIP | Microchip
AT89S52-24PU

AT89S52-24PU - 8-bit 8051 MCU, 24MHz, 8KB Flash, 40-PDIP | Microchip

The Microchip (originally Atmel) AT89S52-24PU is a low-power, high-performance CMOS 8-bit microcontroller based on the industry-standard 8051 instruction set, housed in a 40-pin PDIP through-hole package. It integrates 8KB of In-System Programmable (ISP) flash memory, 256 bytes of RAM, four 8-bit I/O ports (32 I/O lines), three 16-bit timer/counters, a full-duplex UART, and a hardware watchdog timer, all operating from a 24MHz internal clock and a 4.0V to 5.5V supply. The "-24PU" suffix denotes the 24MHz speed grade and the PDIP-40 industrial-grade (-40C to +85C) package option. An 8051 microcontroller is a single-chip computer whose instruction set, register layout, and pinout are inherited from Intel's original 1970s-era MCS-51 family. In modern designs, the 8051 core sits at the entry level of the microcontroller hierarchy, occupying a lower tier of raw performance than 32-bit ARM Cortex-M parts but offering unmatched ecosystem maturity, deterministic timing, and a vast installed base of legacy code. The AT89S52 builds on this legacy by replacing the original 8051's mask ROM with 8KB of flash, allowing ISP field updates via the UART bootloader instead of an external EPROM programmer. Key differentiating features include 1000 write/erase flash endurance cycles, fully static operation (clock can be stopped for power saving), dual data pointers for fast XRAM block moves, and a programmable hardware watchdog for unattended fault recovery. The on-chip flash relieves designers of the cost and PCB area of an external boot ROM, and the ISP interface can re-flash the device in-circuit through the serial port without removing it from the board, which simplifies field firmware updates and reduces assembly-line rework. Architecturally, the AT89S52 uses a Harvard-style internal bus with separate program and data paths (the standard 8051 layout) and a 12-clock-per-machine-cycle core that yields one instruction every 500ns at 24MHz. The 8KB flash is mapped to the bottom of the 64KB code space, the 256-byte internal RAM occupies the lowest 256 bytes of the data space (with the upper 128-byte SFR region), and three interrupt sources are prioritized by the standard 8051 scheme. The robust 4.0V to 5.5V supply tolerance and 1000-cycle flash endurance make the device well suited to industrial-control, appliance, and hobby-embedded environments where software updates are infrequent and reliability outweighs throughput. Typical applications include industrial motor-control boards, HVAC thermostat controllers, security-panel keypads, low-cost consumer appliances, and educational breadboard projects that benefit from the 8051's instruction-set familiarity. The through-hole PDIP-40 form factor also makes it well suited to legacy retrofits and through-hole prototyping, where a QFP package would be impractical for hand assembly or rework. A key design consideration is the 8051 core's 12-clock-per-machine-cycle timing: at 24MHz, each instruction cycle is 500ns, which translates to roughly 1 MIPS throughput. When migrating code from higher-end 8051 derivatives (such as the AT89LP52 with 4-clock cycles), engineers must verify timing-critical ISRs, UART baud-rate tables, and timer reload values. Designers should also size the decoupling capacitor network (typically 100nF + 10uF bulk on VCC and AVCC) and configure the EA pin high for internal flash or low for external ROM. This page synthesizes current distributor pricing, drop-in pin-compatible 8051 alternatives, and practical design notes that go beyond the manufacturer datasheet, including which AT89S52 variants retain the original AT89S52 pinout and how the AT89LP52 migration differs electrically even though the package matches.

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AT90CAN128-16MU - 16MHz 8-bit AVR MCU with CAN 128KB Flash | Microchip
AT90CAN128-16MU

AT90CAN128-16MU - 16MHz 8-bit AVR MCU with CAN 128KB Flash | Microchip

The Microchip AT90CAN128-16MU is a high-performance, low-power 8-bit AVR RISC-based microcontroller combining 128 KB In-System Programmable flash memory, 4 KB EEPROM, 4 KB SRAM, 53 general-purpose I/O lines, and an on-chip CAN 2.0A/2.0B controller. It executes 133 powerful instructions, mostly in a single clock cycle, and runs at up to 16 MHz from a 4.5 V to 5.5 V supply, packaged in a 64-pin QFN (9 mm x 9 mm) outline. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory (Flash), working RAM, and a rich set of peripherals (timers, communication controllers, ADC, GPIO). The AT90CAN128 belongs to the AVR 8-bit RISC family, where RISC (Reduced Instruction Set Computer) emphasizes one-cycle execution to deliver high throughput per MHz. In a system hierarchy, this part sits at the edge node: it acquires sensor signals, runs control firmware, and bridges to higher-level networks (here, a CAN bus) for distributed real-time communication. Key features include four flexible Timer/Counters with compare and PWM modes, two USARTs, a byte-oriented Two-Wire Serial Interface (TWI/I²C-compatible), an 8-channel 10-bit ADC, a JTAG debug interface, and a Real-Time Counter with separate oscillator. The on-chip CAN controller supports both standard (11-bit) and extended (29-bit) identifiers, making the device ideal for in-vehicle networking and industrial fieldbus nodes. The 53 GPIO pins are organized into seven ports (PA–PG), and most pins offer programmable internal pull-ups. Typical applications include automotive body and chassis ECUs, industrial CAN-based sensor networks, building automation gateways, and any embedded design requiring deterministic on-board communication plus generous Flash headroom for protocol stacks such as CANopen or DeviceNet. Its 128 KB of Flash also accommodates bootloader-based field upgrades. A practical design consideration is the 4.5 V to 5.5 V supply window: the part is not natively 3.3 V-tolerant, so level shifting is required when interfacing with 3.3 V peripherals. Designers should also follow the datasheet reference decoupling scheme (100 nF per VCC pin plus bulk capacitance) and respect the exposed-pad thermal pad connection on the QFN to minimize junction temperature. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, giving you a one-stop engineering reference for the AT90CAN128-16MU.

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AT90CAN32-15AZ - 8-bit AVR MCU, 16MHz, 32KB Flash, CAN, 64-Pin TQFP | Microchip Technology
AT90CAN32-15AZ

AT90CAN32-15AZ - 8-bit AVR MCU, 16MHz, 32KB Flash, CAN, 64-Pin TQFP | Microchip Technology

The Microchip Technology AT90CAN32-15AZ is an 8-bit AVR RISC-based CMOS microcontroller, automotive-grade, integrating 32KB of in-system programmable Flash, 1KB EEPROM, and 2KB SRAM in a 64-pin TQFP package. It supports clock speeds up to 16MHz (15MHz speed grade suffix) and operates over a 2.7V to 5.5V supply range, with an automotive temperature grade of -40C to +125C. An 8-bit AVR microcontroller is a Harvard-architecture, single-cycle RISC processor optimized for deterministic embedded control. AVR MCUs belong to the broader category of microcontrollers (MCU) -> embedded processors -> semiconductors. The AT90CAN32-15AZ specifically belongs to the AT90CAN family, distinguished by an integrated CAN 2.0A/V2.0B (V2.0B compliant) controller that differentiates it from general-purpose AVR chips such as the ATmega series. Key features of the AT90CAN32-15AZ include: 53 general-purpose I/O lines, 32 general-purpose working registers, an 8-channel 10-bit ADC, advanced communication peripherals (CAN, I2C, SPI, UART/USART), and standard AVR on-chip peripherals including Brown-out Detect/Reset, Power-on Reset, PWM, and a Watchdog Timer. The CAN controller provides hardware frame handling, reducing host CPU overhead in distributed control networks. The AVR enhanced RISC architecture executes most instructions in a single clock cycle, delivering throughput approaching 1 MIPS per MHz. The automotive-grade designation (-AZ suffix) reflects qualification to AEC-Q100 standards, enabling deployment in powertrain, body, and chassis electronic control units. The wide supply voltage range allows direct operation from both 3.3V and 5V rails commonly found in automotive ECUs. Typical applications include automotive body control modules, CAN-based sensor networks, industrial CAN nodes, vehicle lighting controllers, and HVAC actuators. The integrated CAN peripheral eliminates the need for an external CAN controller, reducing BOM cost and PCB area in space-constrained modules. When designing with this device, ensure proper decoupling (100nF + 10uF) near the AVCC/AVSS analog supply pins, follow Microchip AN2461 for CAN bus termination, and verify the JTAG/debug pin assignments before laying out the PCB to avoid conflicts with general-purpose I/O. This page synthesizes distributor pricing, verified drop-in alternatives, and practical design guidance not consolidated in the manufacturer datasheet. Cross-references against AT90CAN64-15AZ, AT90CAN32-15AT, and AT90CAN128-15AZ confirm the same 64-pin TQFP footprint across the AT90CAN32/64/128 family.

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AT90USB646-AU - 16MHz 64KB USB AVR MCU | Microchip
AT90USB646-AU

AT90USB646-AU - 16MHz 64KB USB AVR MCU | Microchip

The Microchip Technology AT90USB646-AU is an 8-bit AVR RISC microcontroller with a 16 MHz clock, 64 KB of ISP flash memory, 2 KB of EEPROM, 4 KB of SRAM, and USB 2.0 low-speed and full-speed device support in a 64-pin TQFP package. It provides 48 general-purpose I/O lines, 32 general-purpose working registers, four flexible timer/counters with compare modes and PWM, a USART, and a byte-oriented two-wire serial interface. A microcontroller is a compact programmable controller that integrates a processor core, memory, and peripherals on one semiconductor device. The AT90USB646 belongs to the hierarchy of 8-bit MCU -> AVR RISC microcontroller -> embedded controller -> semiconductor. Its built-in USB controller allows a board to enumerate as a USB peripheral and exchange data with a host without a separate USB interface IC, while the AVR core supports typical embedded control, communication, and human-interface-device workloads. Key features include read-while-write ISP flash, 64 KB of program memory, 2 KB of EEPROM, 4 KB of SRAM, and a USB 2.0 controller supporting low-speed and full-speed operation. The four timer/counter blocks provide compare and PWM functions, while the USART and two-wire serial interface add communication options beyond USB. The 48 I/O lines provide substantial external connectivity for buttons, indicators, sensors, and peripheral control signals. The AT90USB646-AU combines an 8-bit AVR enhanced RISC processor with dedicated USB and communications peripherals in one device. Its 64 KB flash allocation supports embedded USB firmware, boot code, and application logic in a single controller. Read-while-write operation can improve firmware-update flexibility by allowing supported memory operations during programming, subject to the detailed restrictions in the manufacturer datasheet. The device also includes an 8-channel, 10-bit ADC according to the available product information. Typical uses include USB-connected human-interface devices, HID peripherals, USB-to-serial bridges, bootloaders, data-acquisition controllers, and embedded systems that need both USB connectivity and general-purpose I/O. Its integrated USB controller reduces board complexity in devices that communicate directly with a USB host. The 16 MHz operating clock supports deterministic embedded control, and the timer/counter PWM resources can drive indicator LEDs, motor-control signals, or periodic tasks. The primary design consideration is package and firmware compatibility. The -AU ordering uses a 64-pin TQFP package, so board layout, exposed-pad handling, and pin assignment must follow the manufacturer package drawing rather than a generic 64-pin footprint. USB routing also requires careful placement of the transceiver connection, protection components, and grounding. Firmware should be validated against the USB enumeration, suspend, resume, and bus-power requirements specified by Microchip. This page consolidates the verified distributor listing, manufacturer product information, and cross-reference results into an engineering-focused view of memory, connectivity, package, and replacement options. It also distinguishes true same-footprint choices from functional equivalents that require PCB or firmware changes.

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AT90USB646-AUR - 16MHz 64KB USB AVR MCU | Microchip (Tape & Reel)
AT90USB646-AUR

AT90USB646-AUR - 16MHz 64KB USB AVR MCU | Microchip (Tape & Reel)

The Microchip Technology AT90USB646-AUR is an 8-bit AVR RISC microcontroller with a 16 MHz clock, 64 KB of ISP flash memory, 2 KB of EEPROM, 4 KB of SRAM, and USB 2.0 low-speed and full-speed device support in a 64-pin TQFP package. It provides 48 general-purpose I/O lines, 32 general-purpose working registers, four flexible timer/counters with compare modes and PWM, a USART, and a byte-oriented two-wire serial interface. A microcontroller is a compact programmable controller that integrates a processor core, memory, and peripherals on one semiconductor device. The AT90USB646 belongs to the hierarchy of 8-bit MCU -> AVR RISC microcontroller -> embedded controller -> semiconductor. Its built-in USB controller allows a board to enumerate as a USB peripheral and exchange data with a host without a separate USB interface IC, while the AVR core supports typical embedded control, communication, and human-interface-device workloads. Key features include read-while-write ISP flash, 64 KB of program memory, 2 KB of EEPROM, 4 KB of SRAM, and a USB 2.0 controller supporting low-speed and full-speed operation. The four timer/counter blocks provide compare and PWM functions, while the USART and two-wire serial interface add communication options beyond USB. The 48 I/O lines provide substantial external connectivity for buttons, indicators, sensors, and peripheral control signals. The AT90USB646-AUR combines an 8-bit AVR enhanced RISC processor with dedicated USB and communications peripherals in one device. Its 64 KB flash allocation supports embedded USB firmware, boot code, and application logic in a single controller. Read-while-write operation can improve firmware-update flexibility by allowing supported memory operations during programming, subject to the detailed restrictions in the manufacturer datasheet. The device also includes an 8-channel, 10-bit ADC according to the available product information. Typical uses include USB-connected human-interface devices, HID peripherals, USB-to-serial bridges, bootloaders, data-acquisition controllers, and embedded systems that need both USB connectivity and general-purpose I/O. Its integrated USB controller reduces board complexity in devices that communicate directly with a USB host. The 16 MHz operating clock supports deterministic embedded control, and the timer/counter PWM resources can drive indicator LEDs, motor-control signals, or periodic tasks. The primary design consideration is package and firmware compatibility. The -AU ordering uses a 64-pin TQFP package, so board layout, exposed-pad handling, and pin assignment must follow the manufacturer package drawing rather than a generic 64-pin footprint. USB routing also requires careful placement of the transceiver connection, protection components, and grounding. Firmware should be validated against the USB enumeration, suspend, resume, and bus-power requirements specified by Microchip. This page consolidates the verified distributor listing, manufacturer product information, and cross-reference results into an engineering-focused view of memory, connectivity, package, and replacement options. It also distinguishes true same-footprint choices from functional equivalents that require PCB or firmware changes.

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AT90USB646-MU - 16MHz USB AVR MCU 64-QFN | Microchip
AT90USB646-MU

AT90USB646-MU - 16MHz USB AVR MCU 64-QFN | Microchip

The Microchip Technology AT90USB646-MU is an 8-bit AVR RISC microcontroller with a 16 MHz clock, 64 KB of ISP flash memory, 2 KB EEPROM, 4 KB SRAM, and integrated USB 2.0 low-speed and full-speed device support, all housed in a 64-QFN 9 x 9 mm package. The device combines 48 general-purpose I/O lines, 32 working registers, four timer/counter resources with compare and PWM modes, a USART, and a byte-oriented two-wire serial interface. A microcontroller is a programmable semiconductor that integrates a processor core, nonvolatile program memory, data memory, and peripherals into one compact device. The AVR family belongs to the embedded-controller hierarchy: general-purpose MCU, embedded controller, processor, and semiconductor. AT90USB646-MU targets systems that need local control logic combined directly with USB connectivity, avoiding a separate USB interface controller when the firmware and host software support the AVR platform. Verified product information identifies read-while-write ISP flash, 2 KB EEPROM, 4 KB SRAM, 48 I/O lines, 32 general-purpose working registers, a real-time counter, four flexible timer/counters, PWM, USART, and a byte-oriented two-wire serial interface. Its integrated USB controller supports low-speed and full-speed USB 2.0 operation. These resources make the MCU suitable for compact USB-connected control, data-acquisition, human-interface, bootloader, and embedded peripheral products. The 16 MHz operating frequency provides the timing basis for the AVR core, while the 64 KB flash region stores firmware and 4 KB SRAM supports runtime data. Compared with a larger AVR controller, the AT90USB646 remains resource-focused, yet its 48 I/O lines and USB integration offer substantial peripheral connectivity. Designers must also account for the exposed-pad package, USB signal routing, decoupling, clock stability, and programming requirements. Typical implementations include USB HID controllers, DFU-capable embedded products, USB-to-serial equipment, data loggers, keyboard and control-panel firmware, and small industrial or instrumentation modules. It is particularly useful when a compact, single-chip design needs both deterministic embedded processing and USB device connectivity. PCB implementation requires a 64-QFN land pattern, adequate thermal copper, and short USB differential routing. The supplied data does not provide detailed operating-voltage limits, pin names, or thermal limits, so those values must be checked against the official manufacturer documentation before release to production. This page consolidates the verified manufacturer and distributor information, clarifies the controller's core resources, and identifies practical selection considerations. Pricing and stock are intentionally not inferred because exact commercial values were not supplied; compare authorized distributor quotations and the official product page before procurement.

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AT90USB646-MUR - 16MHz USB AVR MCU 64-QFN | Microchip (Tape & Reel)
AT90USB646-MUR

AT90USB646-MUR - 16MHz USB AVR MCU 64-QFN | Microchip (Tape & Reel)

The Microchip Technology AT90USB646-MUR is an 8-bit AVR RISC microcontroller with a 16 MHz clock, 64 KB of ISP flash memory, 2 KB EEPROM, 4 KB SRAM, and integrated USB 2.0 low-speed and full-speed device support, all housed in a 64-QFN 9 x 9 mm package. The device combines 48 general-purpose I/O lines, 32 working registers, four timer/counter resources with compare and PWM modes, a USART, and a byte-oriented two-wire serial interface. A microcontroller is a programmable semiconductor that integrates a processor core, nonvolatile program memory, data memory, and peripherals into one compact device. The AVR family belongs to the embedded-controller hierarchy: general-purpose MCU, embedded controller, processor, and semiconductor. AT90USB646-MUR targets systems that need local control logic combined directly with USB connectivity, avoiding a separate USB interface controller when the firmware and host software support the AVR platform. Verified product information identifies read-while-write ISP flash, 2 KB EEPROM, 4 KB SRAM, 48 I/O lines, 32 general-purpose working registers, a real-time counter, four flexible timer/counters, PWM, USART, and a byte-oriented two-wire serial interface. Its integrated USB controller supports low-speed and full-speed USB 2.0 operation. These resources make the MCU suitable for compact USB-connected control, data-acquisition, human-interface, bootloader, and embedded peripheral products. The 16 MHz operating frequency provides the timing basis for the AVR core, while the 64 KB flash region stores firmware and 4 KB SRAM supports runtime data. Compared with a larger AVR controller, the AT90USB646 remains resource-focused, yet its 48 I/O lines and USB integration offer substantial peripheral connectivity. Designers must also account for the exposed-pad package, USB signal routing, decoupling, clock stability, and programming requirements. Typical implementations include USB HID controllers, DFU-capable embedded products, USB-to-serial equipment, data loggers, keyboard and control-panel firmware, and small industrial or instrumentation modules. It is particularly useful when a compact, single-chip design needs both deterministic embedded processing and USB device connectivity. PCB implementation requires a 64-QFN land pattern, adequate thermal copper, and short USB differential routing. The supplied data does not provide detailed operating-voltage limits, pin names, or thermal limits, so those values must be checked against the official manufacturer documentation before release to production. This page consolidates the verified manufacturer and distributor information, clarifies the controller's core resources, and identifies practical selection considerations. Pricing and stock are intentionally not inferred because exact commercial values were not supplied; compare authorized distributor quotations and the official product page before procurement.

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AT90USB647-AU - 16MHz AVR USB Microcontroller | Microchip
AT90USB647-AU

AT90USB647-AU - 16MHz AVR USB Microcontroller | Microchip

The Microchip AT90USB647-AU is an 8-bit AVR RISC microcontroller with a 16 MHz clock, 64 KB of flash memory, 4 KB of SRAM, and 2 KB of EEPROM in a 64-TQFP package. It integrates USB 2.0 low-speed and full-speed On-The-Go connectivity, 48 general-purpose I/O lines, 32 working registers, USART, a byte-oriented 2-wire serial interface, timers with PWM support, and a real-time counter. A microcontroller is a programmable semiconductor that integrates a CPU core, memory, and peripherals into one device. The AT90USB647 belongs to the AVR 8-bit microcontroller family and is designed for embedded USB control, human-interface devices, data acquisition, and industrial peripheral applications. Its USB On-The-Go support can simplify device-to-device connectivity while reducing the need for separate USB interface hardware. The verified product information identifies 64 KB of ISP flash memory with read-while-write capability, 2 KB of EEPROM, 4 KB of SRAM, and 48 general-purpose I/O lines. The 16 MHz operating frequency supports responsive control-loop and USB firmware execution, while the 3.3 V and 5 V supply description identifies compatibility with common embedded system rails. The part is available in a 64-pin TQFP package and tray packaging according to the supplied distributor data. The AT90USB647-AU architecture is based on Microchip’s enhanced AVR RISC core and includes four flexible timer/counters with compare modes and PWM, USART, byte-oriented 2-wire serial interface, USB 2.0 low-speed/full-speed On-The-Go, and a real-time counter. These peripherals allow firmware to manage USB data, serial communications, timing events, motor or LED control, and sensor acquisition without requiring several discrete support devices. Typical applications include USB keyboards and mice, HID-class human-interface equipment, USB-to-serial adapters, data loggers, embedded instrumentation, and USB-connected industrial control modules. The large memory footprint is useful for bootloader code, protocol stacks, configuration data, and application firmware, while the broad I/O count supports multiple external peripherals on a single board. When designing around the AT90USB647-AU, confirm the USB connector, transceiver integration, power-supply sequencing, clock implementation, and decoupling requirements against the manufacturer datasheet. Use the specified 64-TQFP footprint and verify all 64 pin assignments before layout. USB signal routing and cable or connector behavior also require board-level validation. This page combines the verified Microchip product description, distributor specifications, package data, source links, and application guidance to support engineering selection and sourcing of the AT90USB647-AU.

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AT90USB647-AUR - 16MHz 64KB USB AVR MCU | Microchip
AT90USB647-AUR

AT90USB647-AUR - 16MHz 64KB USB AVR MCU | Microchip

The Microchip Technology AT90USB647-AUR is an 8-bit AVR RISC microcontroller with USB 2.0 device support, 64KB of ISP flash memory, 2KB EEPROM, 4KB SRAM, and 48 general-purpose I/O lines. It operates at up to 16MHz and is packaged in a 64-pin TQFP (14x14 mm) tape-and-reel option. Its integrated USB controller supports low-speed and full-speed operation, while the AVR core provides a compact platform for USB-connected control, data acquisition, human-interface, and embedded peripheral designs. A microcontroller is an integrated computing device containing a processor core, nonvolatile program memory, working memory, and dedicated peripherals. The AT90USB647 belongs to the hierarchy of AVR 8-bit RISC microcontrollers, embedded microcontrollers, and general-purpose semiconductor integrated circuits. Its USB connectivity, moderate memory capacity, and 48 I/O pins make it suitable for systems that need local control without the cost or complexity of a higher-bit-width processor. Key device features include 64KB of flash with read-while-write capability, 2KB EEPROM, 4KB SRAM, 48 I/O lines, 32 general-purpose working registers, and four flexible timer/counter blocks with compare and PWM modes. The device also includes USART, byte-oriented two-wire serial interface, and USB 2.0 low-speed and full-speed On-The-Go support. These resources consolidate several control and communication tasks into one device. The AT90USB647-AUR combines a 16MHz AVR architecture with dedicated USB connectivity, allowing firmware to enumerate as a USB peripheral while using timers for timing, PWM for actuator control, and serial interfaces for sensors or external modules. Its 48 I/O lines provide substantial board-level connectivity for indicators, buttons, relays, displays, and data-capture circuits. The 2KB EEPROM supports nonvolatile parameter storage, while the 4KB SRAM provides working memory for protocol handling and control state. Typical applications include USB bootloaders, USB-to-serial bridges, industrial control modules, USB-connected instrumentation, human-interface devices, and embedded accessory controllers. The manufacturer product page also identifies MPLAB Snap and ICSP connectivity, supporting programming and debugging workflows. The 64-pin TQFP footprint offers a conventional leaded surface-mount package for prototype and production assemblies where a higher pin-count analog or mixed-signal interface is useful. When designing around this MCU, confirm the USB operating mode, clocking arrangement, power requirements, and every exposed-pin function against the manufacturer datasheet before layout. Route USB D+ and D- as a controlled-impedance differential pair, keep the interface away from noisy switching nodes, and provide the decoupling and crystal or clock circuitry recommended by the application reference design. Firmware should also use the USB descriptors and device identifiers appropriate to the finished product. This page consolidates verified manufacturer and distributor specifications, practical USB design guidance, same-family comparisons, and sourcing information. It adds engineering context around memory, connectivity, programming, and package reuse without replacing the complete manufacturer datasheet for production design release.

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AT90USB647-MU 16MHz 64KB USB MCU | Microchip Technology
AT90USB647-MU

AT90USB647-MU 16MHz 64KB USB MCU | Microchip Technology

The Microchip Technology AT90USB647-MU is an 8-bit AVR RISC microcontroller with USB 2.0 device support, 64KB of ISP flash memory, 2KB of EEPROM, 4KB of SRAM, and 48 general-purpose I/O lines. It operates at up to 16MHz and is supplied in a 64-pin VFQFN package with an exposed pad. The device combines an AVR microcontroller, USB connectivity, serial interfaces, timers, and modular peripherals in one integrated package. A microcontroller is a programmable semiconductor that executes firmware, coordinates digital peripherals, and provides the central control logic for embedded products. The AT90USB series belongs to the AVR family of low-power 8-bit RISC devices. In a USB-enabled product, the controller can manage host-to-device data transfer, firmware updates, configuration handling, and application-specific control functions without requiring a separate USB interface controller. The verified feature set includes 64KB of flash with read-while-write capability, 2KB of EEPROM, 4KB of SRAM, and 32 general-purpose working registers. The device provides USB 2.0 low-speed and full-speed On-The-Go support, a USART, a byte-oriented 2-wire serial interface, a real-time counter, and four flexible timer/counters with compare modes and PWM. These resources support USB peripherals, human-interface devices, data acquisition, industrial control, communication bridges, and embedded USB test equipment. The 64-pin package leaves substantial I/O capacity for USB data, programming, debugging, serial communication, timers, and application signals. The exposed pad is intended for thermal management, but actual power dissipation and layout requirements depend on clock rate, I/O activity, supply voltage, ambient temperature, and PCB construction. The supplied data confirms industrial-temperature ordering information through the AT90USB647-MU listing, while detailed operating-temperature limits should be confirmed in the manufacturer datasheet. Typical designs place the microcontroller beside USB protection, clock circuitry, decoupling capacitors, programming access, and application-specific sensors or transceivers. Designers should preserve the exposed-pad land pattern, route USB differential signals with controlled impedance, keep high-current paths compact, and validate firmware compatibility before production release. AT90USB647-MU is a tray-packaged ordering option; the exact exposed-pad dimensions and complete pin map are not fully included in the supplied source snippets. This product page combines the verified Microchip feature summary, distributor package information, and application-oriented design guidance. Pricing and lead time vary by supplier, so procurement should be confirmed against current distributor listings as of 2026-10-23. The data also identifies AT90USB647-MUR as a closely related reel-packaging designation, but packaging form alone is not treated here as a separate drop-in alternative.

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AT90USB647-MUR 16MHz 64KB USB MCU | Microchip Technology (Tape & Reel)
AT90USB647-MUR

AT90USB647-MUR 16MHz 64KB USB MCU | Microchip Technology (Tape & Reel)

The Microchip Technology AT90USB647-MUR is an 8-bit AVR RISC microcontroller with USB 2.0 device support, 64KB of ISP flash memory, 2KB of EEPROM, 4KB of SRAM, and 48 general-purpose I/O lines. It operates at up to 16MHz and is supplied in a 64-pin VFQFN package with an exposed pad. The device combines an AVR microcontroller, USB connectivity, serial interfaces, timers, and modular peripherals in one integrated package. A microcontroller is a programmable semiconductor that executes firmware, coordinates digital peripherals, and provides the central control logic for embedded products. The AT90USB series belongs to the AVR family of low-power 8-bit RISC devices. In a USB-enabled product, the controller can manage host-to-device data transfer, firmware updates, configuration handling, and application-specific control functions without requiring a separate USB interface controller. The verified feature set includes 64KB of flash with read-while-write capability, 2KB of EEPROM, 4KB of SRAM, and 32 general-purpose working registers. The device provides USB 2.0 low-speed and full-speed On-The-Go support, a USART, a byte-oriented 2-wire serial interface, a real-time counter, and four flexible timer/counters with compare modes and PWM. These resources support USB peripherals, human-interface devices, data acquisition, industrial control, communication bridges, and embedded USB test equipment. The 64-pin package leaves substantial I/O capacity for USB data, programming, debugging, serial communication, timers, and application signals. The exposed pad is intended for thermal management, but actual power dissipation and layout requirements depend on clock rate, I/O activity, supply voltage, ambient temperature, and PCB construction. The supplied data confirms industrial-temperature ordering information through the AT90USB647-MUR listing, while detailed operating-temperature limits should be confirmed in the manufacturer datasheet. Typical designs place the microcontroller beside USB protection, clock circuitry, decoupling capacitors, programming access, and application-specific sensors or transceivers. Designers should preserve the exposed-pad land pattern, route USB differential signals with controlled impedance, keep high-current paths compact, and validate firmware compatibility before production release. AT90USB647-MUR is a tray-packaged ordering option; the exact exposed-pad dimensions and complete pin map are not fully included in the supplied source snippets. This product page combines the verified Microchip feature summary, distributor package information, and application-oriented design guidance. Pricing and lead time vary by supplier, so procurement should be confirmed against current distributor listings as of 2026-10-23. The data also identifies AT90USB647-MURR as a closely related reel-packaging designation, but packaging form alone is not treated here as a separate drop-in alternative.

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AT91FR4042-CI - ARM7 75MHz MCU 512KB Flash 121-BGA | Microchip
AT91FR4042-CI

AT91FR4042-CI - ARM7 75MHz MCU 512KB Flash 121-BGA | Microchip

The Microchip Technology AT91FR4042-CI is an ARM7TDMI-based 16/32-bit RISC microcontroller integrating 512 KB of on-chip Flash and 256 KB of on-chip SRAM in a 121-ball BGA (10x10 mm) package. It operates at up to 75 MHz and targets embedded applications that need an external bus interface alongside high-density on-chip memory. An ARM7TDMI microcontroller is a 32-bit RISC processor core licensed by Arm Ltd., combining a 32-bit data path with the 16-bit Thumb instruction set to balance performance and code density. Devices in this family are widely used as general-purpose embedded controllers because they pair deterministic interrupt handling with mature tool support (GCC, IAR, Keil). The AT91 sub-line from Microchip/Atmel extends the core with peripheral blocks such as USARTs, timers, and an external bus interface, placing it in the broader category of embedded microcontrollers -> microprocessors -> semiconductors. Key features of the AT91FR4042-CI include 512 KB (4 Mbits) of reprogrammable program storage, 256 KB (2 Mbits) of SRAM, an external bus interface for off-chip memory or peripherals, two USARTs, a 3-channel timer/counter, a watchdog timer, embedded ICE (in-circuit emulation) debug, and advanced power-saving modes. The combination of large on-chip memory and an external bus removes the need for external SRAM or Flash in many designs, reducing board complexity and BOM cost. The device is fabricated on a low-power CMOS process and runs from a 1.8 V core supply, with separate I/O domain rails. Its MIPS/Watt figure is competitive for the era and the architecture remains popular for legacy industrial and POS designs that need deterministic real-time performance. The embedded ICE block provides non-intrusive debug and Flash programming without external hardware beyond a standard JTAG probe. Typical applications include industrial control, point-of-sale terminals, secure access controllers, HMI panels, and other embedded designs that require 32-bit performance with rich on-chip memory. The 121-BGA package makes it suitable for compact, high-density boards. When designing with the AT91FR4042-CI, ensure the core supply is decoupled with low-ESR ceramic capacitors placed as close as possible to the power balls. The external bus interface requires careful impedance-controlled routing to avoid signal integrity issues at higher bus speeds. This page synthesizes distributor stock, replacement alternatives, and practical design notes not found in the standalone manufacturer datasheet.

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AT91RM9200-CJ-002 - ARM920T MCU 180MHz 128KB ROM BGA-256 | Microchip
AT91RM9200-CJ-002

AT91RM9200-CJ-002 - ARM920T MCU 180MHz 128KB ROM BGA-256 | Microchip

The Microchip AT91RM9200-CJ-002 is a complete system-on-chip built around the ARM920T ARM Thumb processor, integrating 128 KB of on-chip ROM, 48 KB of internal SRAM, and a rich set of system and application peripherals in a 256-ball BGA package (15x15 mm). The device operates at up to 180 MHz, delivering 200 MIPS with a memory management unit, 16 KB instruction cache, 16 KB data cache, and write buffer for high-throughput embedded workloads. An ARM920T-based microcontroller is a 16/32-bit RISC microprocessor core that combines the ARM7TDMI integer pipeline with separate instruction and data caches plus a memory management unit, making it suitable for running full operating systems such as Linux or Windows CE. As a product category, this sits within the ARM9 family of application processors, which targets industrial control, networking, and human-machine interface designs that demand deterministic real-time behavior with reasonable power dissipation. The architecture is widely adopted in point-of-sale terminals, building automation, and embedded gateways where deterministic interrupt handling is essential. Key features of the AT91RM9200-CJ-002 include a 10/100 Ethernet MAC with full DMA, a Full Speed USB Host and Device controller, a Multimedia Card Interface, I2S audio, three USARTs, two SPIs (master/slave), a TWI bus, a 16-bit timer/counter, and a real-time clock. The 256-BGA (15x15) industrial-temperature package (-40C to +85C) is suitable for harsh environment designs and is backed by a broad peripheral set that minimizes external glue logic. The device targets core voltage (Vcc) operation from 1.65 V to 1.95 V and includes an internal oscillator, four DMA channels, and an in-circuit emulator with debug communication channel for trace-aware debugging. Power management includes four programmable external interrupt lines, a watchdog timer, and a real-time clock with separate power domain for low-power standby. Typical applications include industrial automation controllers, Ethernet-attached embedded web servers, USB peripherals, building access control, and point-of-sale terminals. The integrated MAC and USB controllers allow single-chip designs that previously required a discrete network or peripheral controller. When designing with this part, plan PCB layout for the 256-ball BGA footprint, ensure 1.65 V-1.95 V core supply decoupling, and verify BGA ball pad pattern against the manufacturer footprint for manufacturability. This page synthesizes distributor pricing, same-family drop-in alternatives, and practical design notes not consolidated in the manufacturer datasheet, supporting faster sourcing and BOM risk reduction for AT91RM9200-CJ-002 designs.

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AT91RM9200-QU-002 - ARM920T 180MHz MCU | Microchip | Industrial
AT91RM9200-QU-002

AT91RM9200-QU-002 - ARM920T 180MHz MCU | Microchip | Industrial

The Microchip Technology AT91RM9200-QU-002 is a 32-bit ARM920T-based embedded microprocessor running at up to 180 MHz with 128 KB on-chip ROM and 48 KB SRAM, housed in a 208-pin PQFP (28x28 mm) package. It integrates a full-speed USB host and device interface, a 10/100 Ethernet MAC, and a rich peripheral set for embedded control and communication designs. An ARM920T-based embedded microprocessor is a system-on-chip that combines a 32-bit RISC CPU core with memory management, cache, and integrated peripherals on a single die. The AT91RM9200 sits in the hierarchy of ARM9-based microcontrollers, which are themselves a subset of 32-bit embedded processors, which belong to the broader class of microprocessors and microcontrollers used across industrial, networking, and consumer electronics. Key features include a 16 KB instruction cache and 16 KB data cache with write buffer, a memory management unit (MMU) supporting Linux and real-time operating systems, 122 programmable I/O lines, and a supply voltage range of 1.65 V to 1.95 V for the core. The device delivers approximately 200 MIPS at 180 MHz, making it suitable for compute-intensive embedded tasks that require both performance and low power consumption. The AT91RM9200 architecture includes a 16-bit external bus interface, multiple USARTs, master/slave SPI channels, a two-wire interface (TWI), 16-bit timers, an I2S audio interface, and a multimedia card interface (MCI). This peripheral mix enables single-chip solutions for industrial gateways, data loggers, and network appliances without requiring external bridge chips. Typical applications include industrial automation controllers, Ethernet-to-serial gateways, point-of-sale terminals, and embedded Linux systems. The integrated 10/100 Ethernet MAC and USB host/device interfaces reduce BOM cost and board area in networked embedded designs. When designing with the AT91RM9200-QU-002, pay close attention to the 1.8 V core supply decoupling and the 3.3 V I/O rail sequencing. The 208-pin PQFP package requires careful PCB layout to manage the high pin count and maintain signal integrity on the external memory bus. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, providing engineers with a single reference for selection and sourcing decisions.

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AT91RM9200CJ-100 - ARM920T MPU, 180MHz, 100MHz Ind. Temp | Microchip
AT91RM9200CJ-100

AT91RM9200CJ-100 - ARM920T MPU, 180MHz, 100MHz Ind. Temp | Microchip

The Microchip Technology AT91RM9200CJ-100 is an ARM920T-based embedded microprocessor (MPU) running up to 100MHz core clock for industrial temperature variants, delivering 200 MIPS integer performance with 16-bit/32-bit ARM/Thumb instruction set support. Housed in a 256-ball LFBGA (CJ) package (15x15mm), the part integrates an external memory interface, USB host/device, 10/100 Ethernet MAC, and standard peripherals for industrial control and connectivity designs. A microprocessor (MPU) is a system-on-chip that integrates a CPU core, memory controllers, and peripherals on a single die. Within the broader semiconductor hierarchy, an MPU sits above a microcontroller (MCU) in compute capability, sitting alongside application processors and DSPs. The ARM920T core inside the AT91RM9200 adds a Memory Management Unit (MMU), enabling full operating systems such as Linux and embedded Windows CE, unlike MCU-class ARM7 parts that run bare-metal or RTOS-only. Key features include a 16KB instruction cache plus 16KB data cache, write buffer, debug access port supporting JTAG-ICE, dedicated DBGU UART debug channel, embedded trace macrocell (ETM9) for real-time trace, and a power management controller with idle, slow-clock and peripheral-level gating. The external bus interface (EBI) supports SDRAM, SRAM, NAND flash with ECC, and CompactFlash, enabling flexible system memory architectures. Typical applications for the AT91RM9200CJ-100 include industrial gateways and protocol converters, networked PLCs, point-of-sale terminals, embedded HMI panels, and legacy Linux-based control systems where the 256-ball LFBGA (CJ) package provides compact BGA mounting on standard 4-layer PCBs. When designing with this device, allocate adequate ground and decoupling capacitance around the BGA balls, follow the Microchip AT91RM9200 hardware design checklist for SDRAM trace length matching (typically +/-50 mils for the byte-lane groups), and ensure the 32.768kHz slow crystal is placed within 5mm of the RTC pins for oscillator stability.

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AT91SAM7S128D-AU - 55MHz ARM7TDMI MCU, 128KB Flash, USB | Microchip
AT91SAM7S128D-AU

AT91SAM7S128D-AU - 55MHz ARM7TDMI MCU, 128KB Flash, USB | Microchip

The Microchip (formerly Atmel) AT91SAM7S128D-AU is a 32-bit ARM7TDMI RISC microcontroller operating at up to 55 MHz, integrating 128 KB of Flash and 32 KB of SRAM on-chip, and housed in a 64-pin LQFP (10x10 mm) package. It is a member of the SAM7S flash microcontroller family and targets cost-sensitive, high-volume embedded applications that require USB connectivity. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, memory (Flash for program storage, SRAM for runtime data), and a rich set of peripherals (timers, communication interfaces, ADCs, I/O). The AT91SAM7S128D-AU sits within the broader hierarchy: ARM7TDMI core -> ARM7 family -> 32-bit RISC microcontroller -> embedded MCU -> semiconductor IC. Its integrated USB 2.0 Full-Speed Device port differentiates it from competitors by eliminating the need for an external USB transceiver, reducing BOM cost and PCB area in peripheral designs. Key features include a 55 MHz ARM7TDMI core with Thumb instruction set support, 128 KB on-chip Flash, 32 KB SRAM, USB 2.0 Full-Speed Device port, up to 32 peripheral DMA channels, a 10-bit ADC, two USARTs, one UART, two TWI (I2C-compatible) interfaces, an SPI, two 3-channel 16-bit timers, an RTT, a watchdog timer, and a real-time clock. The device operates from 3.0 V to 3.6 V supply and includes an embedded voltage regulator for core logic. Architecturally, the SAM7S series uses a multi-layer AHB/APB bus matrix that allows simultaneous access to peripherals by the CPU and the peripheral DMA controller, eliminating data-transfer bottlenecks typical of single-bus MCUs. The integrated 3.3V LDO regulator and power-on-reset block reduce external component count to a minimum, while the Embedded Flash Controller (EFC) provides Flash read and write access with wear-leveling support. Typical applications include USB peripherals such as HID devices, USB-to-serial adapters, USB barcode scanners, USB keyboards and mice; consumer electronics with embedded control; industrial control nodes; and migration paths for legacy 8-bit designs that require more performance. The aggressive price point and high integration make it well suited to cost-sensitive, high-volume consumer markets. When designing with the AT91SAM7S128D-AU, engineers should ensure the 64-LQFP thermal pad is properly soldered for thermal and electrical performance, and use the integrated voltage regulator's recommended 4.7 µF decoupling capacitors. For USB applications, the D+ and D+ pull-up resistor network must follow the USB 2.0 specification for proper enumeration. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet alone.

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AT91SAM7X512B-AU - 512KB Flash ARM7 MCU w/ Ethernet | Microchip
AT91SAM7X512B-AU

AT91SAM7X512B-AU - 512KB Flash ARM7 MCU w/ Ethernet | Microchip

The Microchip AT91SAM7X512B-AU is a 32-bit ARM7TDMI-based flash microcontroller (MCU) running at 55 MHz with 512 KB of embedded Flash and 128 KB of SRAM, housed in a 100-pin LQFP (14x14 mm) package. It integrates a 10/100 Mbps Ethernet MAC, USB 2.0 Full-Speed device port, CAN 2.0A/B controller, and a rich set of serial peripherals including USART, SPI, TWI (I2C), and SSC for audio/I2S streams. The integrated Ethernet MAC embeds a static-MII-less PHY interface and a 16-bit host-side bus that simplifies TCP/IP offload via a hardwired MAC rather than a software stack.

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AT91SAM7X512B-AUR - 512KB Flash ARM7 MCU 100-LQFP | Microchip
AT91SAM7X512B-AUR

AT91SAM7X512B-AUR - 512KB Flash ARM7 MCU 100-LQFP | Microchip

The Microchip AT91SAM7X512B-AUR is a 32-bit ARM7TDMI-based flash microcontroller integrating 512KB of program flash and 128KB of SRAM on-chip, operating at up to 55 MHz from a 1.65V–1.95V core / 3.0V–3.6V I/O supply, housed in a 100-pin LQFP (14x14 mm) package supplied on tape and reel. What is an ARM7-based flash microcontroller? An ARM7TDMI MCU is a 32-bit RISC processor with Thumb 16-bit compressed instruction support, integrating flash program memory, SRAM, peripherals, and often connectivity blocks such as Ethernet MAC and CAN on a single die. In the broader taxonomy it sits below ARM Cortex-M parts but above 8/16-bit 8051/AVR devices, occupying the industrial/embedded connectivity tier where deterministic 32-bit performance and integrated wired networking matter more than ultra-low power. Key features of the AT91SAM7X512B-AUR include an integrated 10/100 Ethernet MAC with MII/RMII interface, a CAN 2.0B controller, a USB 2.0 Full-Speed Device port, an 8-channel 10-bit ADC, four 16-bit timers, an 8-bit RTC, and a peripheral DMA controller that offloads data movement from the core. The embedded flash controller supports in-system programming and bootloader operation from USB or UART. Architecturally, the SAM7X512B uses a three-layer AHB bus matrix connecting the core, flash controller, peripheral DMA, and a bridge to APB peripherals, allowing parallel bus transactions that improve sustained throughput for Ethernet and USB traffic. The ARM7TDMI core's three-stage pipeline delivers roughly 0.9 MIPS/MHz, giving ~49 Dhrystone MIPS at 55 MHz. Typical applications include industrial gateways, building-automation controllers, point-of-sale terminals, CAN-based sensor nodes, and embedded Ethernet bridges. Integrated Ethernet plus CAN makes the part especially suitable for protocol-conversion bridges between factory-floor CAN networks and IP backhaul. When designing with the AT91SAM7X512B-AUR, verify the dual-rail supply (1.8V VDDCORE plus 3.3V VDDIO) and provide bulk decoupling near each power pin. Microchip designates the SAM7X family as not recommended for new designs (NRND); the AT91SAM7XC512B is the pin-compatible successor with optional AES/TDES crypto accelerators. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the standalone manufacturer datasheet, including a v3.9-aligned alternatives list of same-brand and cross-brand drop-in options verified for package and pin compatibility.

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AT91SAM9260B-CU - ARM926EJ-S MCU 180MHz 217-LFBGA | Microchip
AT91SAM9260B-CU

AT91SAM9260B-CU - ARM926EJ-S MCU 180MHz 217-LFBGA | Microchip

The Microchip Technology (formerly Atmel) AT91SAM9260B-CU is a SMART 32-bit ARM926EJ-S embedded microprocessor running at up to 180 MHz, packaged in a 217-ball LFBGA (15x15 mm). It integrates 32 KB of ROM, 8 KB of SRAM, and a 6-layer bus architecture that delivers up to six simultaneous 32-bit internal buses for parallel data movement. Key features include Full-Speed USB Host and Device ports, a 10/100 Ethernet MAC with RMII/MII interface, an image sensor interface (ISI), a MultiMedia Card Interface (MCI), I2S audio, three USARTs, two UARTs, SPI, TWI (I2C), Timer Counters, a Synchronous Serial Controller (SSC), and an ADC. The 6-layer matrix bus architecture provides high internal bandwidth, which makes the part suitable for multimedia, image-capture, and connected-embedded applications. The 'B' silicon revision improves upon the original AT91SAM9260 with errata fixes and refined peripheral behavior. The AT91SAM9260 family occupies the ARM9-based MPU segment of the Microchip SAM9 portfolio. As an ARM926EJ-S device with a memory management unit (MMU), it runs full operating systems such as Linux, WinCE, and MQX. Compared to Cortex-M microcontrollers, it offers higher compute throughput, richer connectivity peripherals, and OS support at the cost of higher power and a more complex toolchain. Typical applications include human-machine interfaces (HMIs), industrial control panels, image-capture and machine-vision front-ends, networked point-of-sale terminals, building automation gateways, and low-cost Ethernet/USB-connected embedded nodes where an MMU-capable SoC is required. When designing with this device, ensure the LFBGA-217 layout uses the manufacturer-recommended 8-layer PCB stack-up, a 12 MHz or similar main oscillator, and a regulated 1.8V core / 3.3V I/O supply pair to satisfy the SAM9260 power-domain requirements. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, giving engineers a single decision-grade source.

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AT91SAM9G20B-CU - 400MHz ARM926 MPU, 217-LFBGA | Microchip
AT91SAM9G20B-CU

AT91SAM9G20B-CU - 400MHz ARM926 MPU, 217-LFBGA | Microchip

The Microchip AT91SAM9G20B-CU is a 400 MHz ARM926EJ-S embedded microprocessor (MPU) housed in a 217-ball LFBGA (15x15 mm) package, integrating fast ROM/RAM, a 10/100 Ethernet MAC, USB host/device interfaces with on-chip transceivers, and an image sensor interface. It belongs to the SAM9G family of smart ARM-based MPUs designed for connected embedded systems. The 'B' suffix designates the revision with the higher 400 MHz core clock versus the legacy 200/266 MHz SAM9G, while the 'CU' suffix denotes the 217-LFBGA industrial-grade package variant. An ARM926EJ-S microprocessor is a 32-bit RISC CPU core featuring the ARMv5TEJ instruction set with Jazelle Java acceleration, MMU, and DSP extensions, designed for embedded applications requiring full operating-system support such as Linux and Windows Embedded Compact. In the broader system hierarchy, the AT91SAM9G20 sits below application processors and above microcontrollers (MCUs), bridging the gap between deterministic MCU-class peripherals and rich-OS-capable CPUs. The 217-LFBGA package is part of the fine-pitch BGA surface-mount family requiring reflow soldering and X-ray or AOI inspection. Key features include an ARM926EJ-S core with 32 KB instruction cache and 32 KB data cache, 64 KB internal SRAM, 16 KB ROM containing the bootloader, and an external bus interface supporting DDR/LPDDR, NAND Flash, and SDRAM. Communication peripherals cover two USB 2.0 Full-Speed ports (host and device), a 10/100 Ethernet MAC with MII/RMII, an Image Sensor Interface (ISI), two SSC/SPI, four UART, two TWI (I2C), and a high-speed multimedia card interface (HSMCI). Operating voltage is 0.9-1.1 V core with 1.65-3.6 V I/O and memory. Typical applications include industrial HMI panels, point-of-sale terminals, barcode scanners, building automation gateways, portable medical data terminals, and Linux-based IoT edge nodes. The combination of Ethernet, dual USB, image sensor input, and DDR controller enables a true single-chip system design without an external bus-master companion. Compared to microcontrollers in the same generation, the AT91SAM9G20 provides full MMU support and Linux BSP availability from Microchip, simplifying migration from MCU-class designs when memory protection and complex OS features are required.

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AT97SC3204-U2A1A-10 - TPM 1.2 Crypto Controller | Microchip | 28-TSSOP
AT97SC3204-U2A1A-10

AT97SC3204-U2A1A-10 - TPM 1.2 Crypto Controller | Microchip | 28-TSSOP

The Microchip AT97SC3204-U2A1A-10 is an AVR-based CryptoController Trusted Platform Module (TPM) compliant with TCG (Trusted Computing Group) TPM 1.2 specifications, housed in a 28-pin TSSOP package (4.40 mm body width). It is a fully integrated hardware security module designed for embedded systems that need to perform RSA/SHA-1 cryptographic operations, secure key storage, platform attestation, and TWI (I²C-compliant) host communication. The device is part of Microchip's AT97SC3204 family and is rated for the industrial temperature range. A Trusted Platform Module (TPM) is a dedicated hardware security controller (a type of microcontroller + EEPROM security IC) that provides a tamper-resistant root of trust for computing platforms. In the broader taxonomy it sits under security IC -> authentication IC -> application-specific microcontroller, and ultimately under semiconductor. TPMs perform RSA encryption/decryption, SHA-1 hashing, random number generation, and sealed key binding/unbinding, all while keeping private keys inside a hardware boundary that resists software-level extraction. Key features include a hardware RNG (FIPS 140-2 compliant random number generator), an integrated Atmel AVR core for command processing, on-chip non-volatile EEPROM key storage, and a TWI/I²C host interface. The device operates from a 3.3 V supply, supports I²C at standard and fast-mode rates, and provides Endorsement Key (EK) pre-provisioning under the suffix -10 (signed EK). The 28-TSSOP footprint and standard TPM pinout allow drop-in replacement on compliant mainboard headers. The architecture combines an 8-bit AVR MCU, a crypto-acceleration block for RSA-1024/2048 and SHA-1, secure EEPROM for persistent keys, and a TWI slave controller. This partitioning keeps the host CPU free of cryptographic computation and keeps private keys bound to hardware for the platform's lifetime. Typical applications include commercial desktop and notebook PCs, server motherboards, embedded industrial controllers requiring secure boot, network equipment needing platform attestation, and any TCG-compliant system that requires hardware-bound credential storage. The TWI interface integrates with standard I²C controllers on most SBCs and SoCs. Designers should ensure the LPC (Low Pin Count) interface is correctly wired to the host chipset's TPM header and that the firmware stack (BIOS/UEFI TCG driver) is enabled in BIOS. The EK variant (-10) is signed and ready for attestation flows; the EK-less variant is suitable for non-attestation use cases. This page combines distributor pricing snapshots, drop-in alternative analysis, and design notes not included in the manufacturer datasheet addendum, providing engineering perspective beyond raw specifications.

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AT97SC3205T-U3A17-AA - TPM I2C Security Module | Microchip
AT97SC3205T-U3A17-AA

AT97SC3205T-U3A17-AA - TPM I2C Security Module | Microchip

The Microchip AT97SC3205T-U3A17-AA is a fully integrated Trusted Platform Module (TPM) security IC designed to be embedded into computer and embedded systems for hardware-rooted cryptographic functions. Housed in a 28-pin SSOP package, this device conforms to the Trusted Computing Group (TCG) Trusted Platform Module Main v1.2, r116 specification and is intended for I2C-compliant host integration, providing secure key storage, platform authentication, and integrity measurement. What is a TPM? A Trusted Platform Module is a dedicated hardware security controller that provides tamper-resistant storage for cryptographic keys, secure generation of RSA keys up to 2048 bits, platform integrity measurement via SHA-1/SHA-256, and remote attestation. The TPM sits on the I2C bus as a peripheral to the host CPU and occupies a unique position in the security hierarchy: hardware root of trust -> security module -> platform security -> system integrity. AT97SC3205T-U3A17-AA implements this hierarchy in a single low-power CMOS device. Key features of the AT97SC3205T-U3A17-AA include RSA key generation up to 2048-bit keys, SHA-1 and SHA-256 hash engines for platform integrity, hardware random number generator, secure key storage with hardware tamper detection, I2C host interface for low-pin-count integration, and an integrated firmware that is field-upgradable through a secured loader. The device operates from a single 3.3V supply and uses CMOS technology for low quiescent current. The AT97SC3205T family is positioned for desktops, laptops, embedded industrial PCs, and other systems that require TCG 1.2 compliance (note: not TCG 2.0). Designers select this part when TCG Main v1.2 r116 compliance is mandated by procurement specifications, by Microsoft Windows Vista/7 era certification requirements, or by embedded OEMs whose customers require TPM presence in the BOM. Because TPM 2.0 has largely replaced 1.2 in new designs, this part serves legacy systems, industrial security appliances, and embedded markets where long-life TCG 1.2 platforms are standard. Typical applications include commercial desktop and laptop motherboards, industrial PCs and HMIs, point-of-sale terminals, secure printing devices, and embedded security appliances. The I2C interface allows integration with both x86 chipsets and ARM-based SoCs that expose I2C. For TCG 2.0 systems, consider AT97SC3205T family members with TCG 2.0 compliance or the newer AT97SC3205 family variants. When designing with the AT97SC3205T-U3A17-AA, the host driver stack must match the TCG 1.2 specification; Linux drivers (tpm_tis_i2c) and Windows TBS (TPM Base Services) provide the OS-level interface. The I2C lines require pull-up resistors per I2C specification, and the TPM's GPIO/PIR (presence) pin must be wired to the platform's TPM-presence detection logic. Power sequencing: VCC must stabilize before the host begins I2C transactions. This page synthesizes distributor availability, parametric alternatives within the same SSOP-28 footprint, and platform-integration design notes drawn from manufacturer reference documentation - content not found in the standalone datasheet.

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ATA6563-GAQW1 - High-Speed CAN FD Transceiver SOIC-8 | Microchip
ATA6563-GAQW1

ATA6563-GAQW1 - High-Speed CAN FD Transceiver SOIC-8 | Microchip

The Microchip ATA6563-GAQW1 is a high-speed CAN FD transceiver providing an interface between a CAN protocol controller and the physical two-wire CAN bus. Housed in an 8-pin SOIC package, the device supports CAN FD data rates up to 5 Mbit/s and operates from a 5V nominal supply across an ambient temperature range of -40C to +150C (AEC-Q100 Grade 0). The integrated VIO pin and Wake-Up Pattern (WUP) function provide low-power standby capability with bus wake-up, enabling nodes to remain quiescent while still monitoring the CAN bus. A CAN FD transceiver (Controller Area Network with Flexible Data-Rate) is the physical-layer device that translates the differential logic signals of a CAN protocol controller into the bus-side differential signaling required by the ISO 11898-1 standard. CAN transceivers belong to the broader category of automotive-grade communication interface ICs, sitting in the signal chain between a microcontroller's CAN controller and the actual bus wiring. CAN FD extends classical CAN from 1 Mbit/s to 5 Mbit/s by allowing faster bit rates during the data phase, and the transceiver must preserve the dominant-bit timing needed for arbitration. Key features include compliance with ISO 11898-1:2015, low electromagnetic emission (EME), high electromagnetic immunity (EMI), an under-voltage detection on VCC and VIO, thermal shutdown protection, and bus-pin transient voltage robustness typical of automotive transceivers. The -GAQW1 ordering code designates the SOIC-8 variant (3.9 mm body width, tape-and-reel packaging, automotive qualification per AEC-Q100). The architecture combines a differential transmitter with slope-controlled output to limit EME, a high-CMRR differential receiver, and integrated protection diodes on the bus pins. The VIO reference pin lets the logic interface track I/O voltages down to 1.8V on modern microcontrollers, while the WUP function filters remote-frame wake-up events per the ISO 11898-2 standard. Bus pins are tolerant to -27V to +40V and include load-dump resilience typical of automotive CAN transceivers. Typical applications include automotive body and powertrain ECUs, ADAS sensor nodes, industrial CAN FD networks, gateway modules bridging CAN and CAN FD segments, and battery-management or motor-control ECUs that need a low-power standby mode with selective wake-up. Industrial uses include CANopen and DeviceNet nodes and remote I/O blocks. When designing with the ATA6563-GAQW1, place a 100 nF decoupling capacitor close to VCC and use a split termination (60 ohm resistor + 4.7 nF capacitor) on each bus terminal to meet OEM EMC requirements. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, giving engineers an at-a-glance view of availability, cross-brand equivalents, and CAN bus design best practices.

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ATA6571RT - Radiation-Tolerant CAN FD Transceiver, 5 Mbps | Microchip
ATA6571RT

ATA6571RT - Radiation-Tolerant CAN FD Transceiver, 5 Mbps | Microchip

The Microchip Technology ATA6571RT is a radiation-tolerant, stand-alone high-speed CAN FD transceiver that interfaces a Controller Area Network (CAN) protocol controller and the physical two-wire CAN bus. The device supports data rates up to 5 Mbps in CAN FD mode, operates from a 4.5V to 5.5V supply, and is delivered in a small-footprint SOIC-style package suited to flight hardware. A CAN transceiver is the physical-layer bridge between a microcontroller's CAN protocol controller and the differential two-wire bus. In modern in-vehicle networks (IVN), CAN FD (Flexible Data-rate) extends classic CAN's 1 Mbps ceiling by allowing higher bit rates in the data phase, which is critical for advanced driver-assistance (ADAS) sensors, body controllers and powertrain ECUs. The ATA6571RT is part of the radiation-tolerant (Rad-Tol) product family designed for low-earth-orbit constellations, GEO communications payloads and other space-grade platforms where single-event effects (SEE) and total ionizing dose (TID) must be characterized. Key features include ISO 11898-2 and ISO 11898-5 physical-layer compliance, SAE J2962-2 conformance for radiated/conducted immunity, ±40V bus fault protection, thermal shutdown, and an integrated dominant-timeout watchdog. The bus pins are designed for high DC load-dump resilience and meet the rigorous EMC/ESD requirements common to aerospace and heavy-industrial environments. Architecturally, the device combines a low-EMI driver stage with a wide-bandwidth receiver optimized for the 5 Mbps FD data phase. The radiation-tolerance is achieved through silicon process selection, characterized SEE/TID performance, and per-lot qualification testing documented in the Microchip radiation reports. Typical applications include satellite command/telemetry buses, spacecraft avionics networks, launch-vehicle data acquisition, and radiation-prone industrial controls. The same part can also be designed into high-reliability ground systems where a Rad-Tol part number simplifies parts-control and derating documentation. Design consideration: verify bus termination (typically 120 ohm at each end of the bus), place the device close to the bus connector to minimize stub length, and ensure the VCC pin has a 100 nF + 4.7 uF decoupling network within 5 mm. In space applications, single-event functional interrupt (SEFI) recovery timing must be evaluated against the host MCU's CAN controller timeout window. This page synthesizes distributor availability, drop-in Rad-Tol and standard CAN FD alternatives, and application guidance not collected in the manufacturer brochure alone.

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