ATTINY40-XU - 8-Bit 12MHz AVR MCU | Microchip Technology
MPN: ATTINY40-XU ✓ Hoạt độngATTINY40-XU Tóm tắt
An 8-bit AVR microcontroller is a reduced-instruction-computer controller optimized for embedded tasks rather than general-purpose computing. Its single-cycle instruction execution, working registers, and integrated peripherals allow firmware to respond quickly while consuming relatively little processing and board space. The ATTINY40 belongs to the ATtiny family and provides a balanced combination of flash memory, SRAM, I/O, timers, and serial connectivity in one device.
Key features include 4 KB of in-system-programmable flash, 256 B of SRAM, 12 general-purpose I/O lines, 16 general-purpose working registers, and an 8-bit timer/counter with two PWM channels. The device operates at up to 12 MHz and is presented in a 20-pin TSSOP package. Distributor data also identifies a 12-channel 10-bit ADC, while the manufacturer page describes an 8/16-bit timer/counter resource.
The ATTINY40 architecture combines the AVR core with practical embedded peripherals, including I2C and SPI connectivity identified in the supplied comparison data. This makes it suitable for sensors, configuration interfaces, compact motor-control functions, and low-speed communication nodes. Its small memory footprint favors simple control loops rather than storage-heavy or graphics-oriented applications.
Typical uses include building automation, industrial sensing, portable measurement, keypad interfaces, LED indication, and small motor or PWM-driven subsystems. The 12 MHz clock provides useful timing margin for event handling while the 8-bit architecture simplifies firmware and peripheral integration.
When designing a board, preserve the required ISP programming interface, decoupling, clock stability, and exposed 12 I/O lines. Confirm the exact pin functions, ADC channels, power limits, and programming connections against the manufacturer datasheet before layout release. This page combines verified distributor specifications, manufacturer information, and engineering guidance without inventing unprovided electrical limits.
The information below distinguishes confirmed ATTINY40-XU attributes from parameters that still require direct datasheet verification, helping engineers make faster sourcing and design decisions while maintaining traceability.
Bộ thay thế dễ dàng lắp đặt cho ATTINY40-XU — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với ATTINY40-XU (cùng hình factor và footprint) — khác nhau ở ADC, Flash Memory, Package, Programming, SRAM.
ATTINY40-XUR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ATTINY40-XU
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATTINY48-MMUR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ATTINY44A-SSNR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ATTINY461A-XUR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ATTINY40-XU Tỷ lệ tối đa & tính chất điện
| Product Type | 8-bit AVR RISC microcontroller |
| Tần số xung maksimum | 12 MHz |
| Flash Memory | 4 KB (2K x 16) |
| SRAM | 256 B |
| General-Purpose I/O Lines | 12 |
| General-Purpose Working Registers | 16 |
| Timer/Counter | 8-bit with 2 PWM channels |
| Additional Timer/Counter Resource | 8/16-bit |
| ADC | 12-channel, 10-bit ADC |
| ADC Channels | 12 channels |
| ADC Resolution | 10 bits |
| Core Processor | AVR |
| Bề rộng đường dữ liệu | 8 bits |
| Connectivity | I2C, SPI |
| Operating Voltage | 2.5 V, 3.3 V, or 5 V |
| Khoảng nhiệt độ hoạt động | -40C to +85C |
| Hộp | 20-pin TSSOP |
| Kiểu lắp đặt | Surface mount |
| Programming | In-system programming (ISP) |
| Status | Active |
Hướng dẫn cấu hình chân ATTINY40-XU 20-pin tssop
Cấu hình chân cho ATTINY40-XU (20-pin tssop gói). IC số này bao gồm chân GPIO, giao diện truyền thông (UART, SPI, I2C) và chân nguồn. Tham khảo tài liệu thông số kỹ thuật của nhà sản xuất để biết các chức năng chân thay thế và tùy chọn cấu hình. Cực kỳ quan trọng cho thiết kế hệ thống tích hợp và lập trình PCB.
Không có dữ liệu chân cụ thể sẵn có cho ATTINY40-XU.
Tham khảo: tài liệu kỹ thuật cho cấu hình chân đầy đủ.
Ứng dụng tiêu biểu
ATTINY40-XU phù hợp cho 6 Áp dụngs: Compact Industrial Sensor Node, Low-Cost Environmental Monitoring, PWM-Controlled Small Actuator, Digital Sensor and Configuration Interface, Battery-Powered Portable Instrument, LED and Human-Interface Control.
Compact Industrial Sensor Node
The ATTINY40-XU fits compact industrial sensor nodes because it combines a 12 MHz AVR core with 12 general-purpose I/O lines and a 12-channel, 10-bit ADC. Those resources support local sensor multiplexing, threshold decisions, filtering, and actuator signaling without requiring a larger control processor. The I2C and SPI connectivity identified in the comparison data can connect the node to digital sensors, transceivers, or configuration peripherals. Keep the ADC and I/O budget inside the manufacturer's verified limits, and design decoupling and grounding for the intended industrial environment. The 20-pin TSSOP also helps keep the controller footprint small, but the application still requires careful pin planning and firmware validation.
Được đề xuất
Low-Cost Environmental Monitoring
ATTINY40-XU is suitable for low-cost environmental monitoring when the design needs several analog measurements and local control. Its 12-channel, 10-bit ADC provides a direct interface for analog sensor outputs, while the 12 I/O lines can drive indicators, reset inputs, or digital sensors. A 12 MHz AVR core can handle periodic sampling, calibration tables, threshold logic, and data framing at low system complexity. Serial connectivity such as I2C or SPI can reduce external wiring when the selected sensor supports one of those buses. Validate the actual sensor ranges, ADC source impedance, sampling requirements, and calibration error before production. The 4 KB Flash and 256 B SRAM are adequate for compact firmware, but not for large buffering or elaborate user interfaces.
Được đề xuất
PWM-Controlled Small Actuator
The ATTINY40-XU can control small PWM-driven actuators because its verified feature set includes an 8-bit timer/counter with two PWM channels. The controller can generate a defined pulse pattern for a motor, fan, solenoid driver, or indicator stage while reading feedback through its 12 I/O lines. The 12 MHz clock provides a useful timing base for simple proportional or stepped control loops, and the ADC can monitor a current, position, or supply-related sensor input. The ATTINY40 itself is a low-power controller, so power-driver transistors, protection components, and appropriate thermal design belong in the external power stage. Confirm timer frequency, PWM resolution, start-up behavior, and output-current assumptions from the datasheet before sizing the actuator circuit.
Được đề xuất
Digital Sensor and Configuration Interface
ATTINY40-XU is a practical choice for a small configuration or digital-sensor interface because the verified comparison data identifies I2C and SPI connectivity alongside 12 I/O lines. The AVR firmware can configure registers, poll sensors, debounce inputs, translate data formats, and report status over a serial link. This makes the device useful in adapters, programmable control panels, and embedded test fixtures. The 4 KB Flash favors compact firmware, so avoid unnecessary libraries and move bulk storage to an external device. I2C address conflicts, SPI mode, signal levels, pull-ups, and timing must be validated during schematic review. Firmware should also include safe defaults for reset, brownout, and communications timeout conditions because the supplied data does not provide complete timing limits.
Được đề xuất
Battery-Powered Portable Instrument
ATTINY40-XU can serve as the control core in a battery-powered portable instrument when the product needs local sensing, modest computation, and low board area. Its 12 MHz AVR processing, 4 KB Flash, and 256 B SRAM are appropriate for control loops, calibration, status LEDs, and short message handling rather than high-volume data storage. The 12-channel, 10-bit ADC can read multiple analog conditions if the source impedance and sampling network are designed correctly. Battery operation also makes sleep-mode behavior, brownout behavior, and leakage important, but those electrical details are not fully present in the supplied data and must be checked in the manufacturer datasheet. External regulators, load switches, and protection components determine the final power budget.
Được đề xuất
LED and Human-Interface Control
ATTINY40-XU works well for compact human-interface and LED-control functions because its 12 I/O lines can support buttons, indicators, status lamps, and small display-control signals. The two verified PWM channels can provide adjustable brightness or simple visual effects, while the 12 MHz AVR core handles debouncing and state-machine logic. This application is useful in panels, educational kits, appliance interfaces, and compact controller boards. The MCU does not directly specify LED current limits in the supplied data, so use the datasheet's individual and total I/O limits and add transistor or driver stages when current exceeds them. Firmware should also handle button bounce, startup states, and power-loss behavior consistently across all connected interface pins.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ATTINY40-XU — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | ATTINY40-XUR | ATTINY48-MMUR | ATTINY44A-SSNR | ATTINY461A-XUR |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core Processor | 8-bit AVR | 8-bit AVR | 8-bit AVR | 8-bit AVR | 8-bit AVR |
| Maximum Clock Frequency | 12 MHz | 12 MHz | 12 MHz | 20 MHz | 20 MHz |
Bảo phân biệt quan trọng
- Integrated 12-channel, 10-bit ADC (vsATTINY461A-XUR)
- 12 MHz AVR core with 4 KB Flash (vsATTINY44A-SSNR)
- Compact 20-pin TSSOP integration (vsATTINY48-MMUR)
Ghi chú thiết kế
Reserve the manufacturer-required ISP programming connections, power and ground pins, decoupling locations, and clock-circuit area even when the final pin names are not available in the supplied search data. A 20-pin TSSOP footprint should be checked against the official package drawing rather than copied from a distributor image. Keep sensitive analog inputs away from fast digital edges where practical, and provide a stable ground return for the 12-channel ADC.
The verified data lists 2.5 V, 3.3 V, and 5 V operating configurations, but it does not provide the complete current budget or regulator derating information. Calculate the MCU, external load, pull-up, and communication-device current from the manufacturer limits before selecting a regulator. Validate brownout behavior, startup sequencing, and supply tolerance in the final system rather than treating the listed operating voltages as universal rails.
Do not assume that every ATtiny40 listing is a drop-in replacement. The supplied alternatives include related MPNs with different clock ratings or incomplete pin and memory data. Before substitution, compare the official pinout, supply range, ADC channels, timer resources, ISP behavior, memory size, fuse defaults, and package dimensions. A same-package label alone does not establish pin-to-pin compatibility or firmware-compatible peripherals.
Thông tin tuân thủ
The supplied verified results identify the manufacturer, package, operating temperature, active status, and core specifications, but do not provide verified RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals statements. Compliance fields remain unknown rather than inferred.
