ATTINY85-20PU - 20MHz 8-Bit AVR MCU | Microchip Technology
料号： ATTINY85-20PU ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
ATTINY85-20PU 概述
An 8-bit microcontroller is a compact programmable controller that executes firmware to read sensors, control actuators, sequence power systems, and manage communication interfaces. The ATtiny85 belongs to Microchip's ATtiny family and uses the AVR architecture, combining small instruction-level complexity with integrated Flash, EEPROM, SRAM, timers, serial interfaces, and analog conversion functions.
The ATTINY85-20PU's principal verified characteristics include an 8 KB Flash program memory organized as 4K x 16, 0.512 KB EEPROM, a 20 MHz maximum clock, six I/O pins, and a 2.7 V to 5.5 V supply range reported in the cross-reference data. Its in-system programmability supports programming and updating without removing the device from a finished assembly.
The device is appropriate when a design needs more processing capability than the smallest ATtiny devices but very little board area, cost, and energy use. Its 8-pin DIP format is particularly useful for prototyping, repairable assemblies, and through-hole industrial controls where manual insertion and socketed replacement are advantageous.
Typical uses include compact sensor nodes, LED lighting controls, battery-powered timers, small motor controls, fan controllers, and simple SPI or I2C peripherals. Designers must still budget the limited 8 KB program memory, 512-byte SRAM, and six I/O pins when selecting it for a new application.
Keep bypass capacitance close to the supply pins and route high-current outputs away from sensitive analog inputs. Although the package supports external clocking, the exact oscillator, reset, programming, and unused-pin requirements must be taken from the current manufacturer datasheet before layout release.
This page consolidates verified distributor specifications, package information, sourcing links, application guidance, and the limits of the available substitute data. It distinguishes confirmed facts from parameters that still require direct verification rather than presenting unsupported drop-in replacements as equivalent devices.
ATTINY85-20PU 最大额定值与电气特性
| Product Type | 8-bit AVR microcontroller |
| 最大时钟频率 | 20 MHz |
| CPU Architecture | AVR enhanced RISC |
| Program Memory Size | 8 KB (4K x 16) |
| Program Memory Type | Flash |
| Programmable Memory | In-system programmable |
| EEPROM Size | 512 bytes |
| RAM Size | 512 bytes |
| Supply Voltage Range | 2.7 V to 5.5 V |
| ADC | 4-channel, 10-bit |
| I/O Pin Count | 6 pins |
| 封装 | 8-pin DIP, 0.300 inch, 7.62 mm pitch |
| 安装方式 | Through-hole |
| 工作温度 | -40 °C to 85 °C |
| Oscillator | Internal |
ATTINY85-20PU 8-pin dip, 0.300 inch, 7.62 mm pitch 引脚配置指南
ATTINY85-20PU（8-pin dip, 0.300 inch, 7.62 mm pitch 封装）的引脚配置。 该数字 IC 包含 GPIO、通信接口（UART、SPI、I2C）和电源引脚。请参阅制造商数据手册以了解复用引脚功能和配置选项。对嵌入式系统设计和 PCB 布局至关重要。
暂无详细引脚数据： ATTINY85-20PU.
请参阅 数据手册 以查看完整引脚配置。
典型应用
ATTINY85-20PU 适用于 6 应用s: Compact Sensor Node, LED Lighting Controller, Battery-Powered Timer, Small Motor Controller, Simple Serial Interface Adapter, Repairable Through-Hole Control Module.
Compact Sensor Node
The ATTINY85-20PU fits a compact sensor node because it combines a 20 MHz 8-bit AVR core, 8 KB of Flash, 512 bytes of SRAM, and a four-channel 10-bit ADC in only eight DIP pins. Firmware can sample the available ADC channels, apply calibration, evaluate thresholds, and drive indicators or a small communications interface. The six I/O pins leave limited expansion capacity, so the design should use multiplexing where necessary and reserve pins for essential sensor and serial functions. Its 512-byte SRAM requires interrupt handlers and buffers to remain compact.
推荐
LED Lighting Controller
The ATTINY85-20PU can manage compact LED lighting controls using its six I/O pins, 8 KB Flash, and 20 MHz processing headroom. Timer-based firmware can coordinate dimming sequences, status indicators, push-button inputs, and drive logic while the 512-byte SRAM keeps the application compact. The DIP format also makes socketed fixtures serviceable. Supply-voltage and output-current requirements for the attached LEDs are not present in the supplied data, so the LED driver and any required transistors must be selected independently rather than driven directly without verification.
推荐
Battery-Powered Timer
The low-power CMOS ATtiny85 platform is suitable for a battery-powered timer that must perform sequencing without a display driver or large control MCU. ATTINY85-20PU firmware can count timer intervals, operate relays or indicators, and preserve configuration in its 512-byte EEPROM. The 8 KB program memory can hold a modest state machine and timing routines, while six I/O pins can support a button, status output, and optional serial interface. Battery life still depends on verified sleep and active-current figures that were not included in the supplied source snippets.
推荐
Small Motor Controller
The ATTINY85-20PU can serve as the command processor for a small, non-safety-critical motor controller when a compact AVR program and limited I/O meet the design needs. Its 20 MHz clock provides timing headroom for debouncing, step sequencing, current monitoring, and fault handling, while the four-channel 10-bit ADC can support analog feedback. Six I/O pins limit simultaneous functions, and the 512-byte SRAM requires a lean scheduler. Motor current, stall behavior, isolation, and thermal protection must be engineered outside the MCU and verified at the system level.
推荐
Simple Serial Interface Adapter
The ATTINY85-20PU can implement a small protocol converter, configurator, or intelligent peripheral when firmware and pin count remain modest. Six I/O pins can be assigned to an external data interface, control signals, status indication, and programming access, while 8 KB Flash accommodates a constrained state machine. The four-channel 10-bit ADC can add local analog status where needed. Engineers must confirm the exact serial peripheral multiplexing, package pin functions, and programming interface from the manufacturer datasheet; those pin-level details were not present in the verified snippets.
推荐
Repairable Through-Hole Control Module
The 8-pin DIP package makes ATTINY85-20PU useful in repairable control modules assembled on perforated boards, prototypes, educational fixtures, and legacy equipment. A socketed device can simplify replacement, while six I/O pins support buttons, indicators, and external interfaces. The verified active lifecycle status supports maintenance use, but firmware compatibility, fuse settings, supply voltage, and any previous timing behavior must be checked before replacing a failed MCU. The 20 MHz grade should not be assumed to be a drop-in match for lower-speed original parts without validating startup and timing constraints.
推荐
推荐产品汇总
工程参考数据： ATTINY85-20PU ——对比、设计指导和合规信息。
选型指南
关键差异点
- Provides eight kilobytes of Flash in an eight-pin through-hole package （对比 STM8S001J3)
- Combines six I/O pins with an integrated four-channel 10-bit ADC （对比 ATTINY84-20PU)
- Uses a through-hole package suited to socketed maintenance （对比 STM8S001J3)
设计说明
Place the supply bypass capacitor immediately between the device power and ground pins, using the connection and value required by the current manufacturer datasheet. Keep the 20 MHz clock path short and isolate it from sensitive analog inputs. Because the verified snippets confirm an 8-pin DIP but not individual pin functions, the PCB designer must resolve the official package drawing before assigning nets or editing the schematic.
Keep the operating supply inside the verified 2.7 V to 5.5 V range and confirm the voltage required by the selected fuse settings and clock configuration. Do not infer operating current or regulator sizing from the generic low-power description. Measure startup, active, and sleep behavior on the intended board because peripherals, pull resistors, external sensors, and clock activity can dominate the ATTINY85-20PU supply demand.
Separate analog input routing from PWM-capable outputs and switching-node traces. Keep external oscillator and programming connections away from high-current actuator paths where practical. The ATTINY85-20PU has only six I/O pins and 512 bytes of SRAM, so reserve pins carefully and prefer shared, multiplexed interfaces when the application can tolerate them. Validate the completed layout for signal integrity across all intended timing and supply conditions.
合规信息
The supplied verified results do not provide exact material-compliance declarations for ATTINY85-20PU. AEC-Q100 is marked not applicable because the supplied data does not identify this exact suffix as an automotive-qualified variant.
