ATMEGA644A-AU vs ATMEGA644-20AU 对比
详细并排对比 ATMEGA644A-AU 出自 Microchip Technology 和 ATMEGA644-20AU 出自 Microchip Technology。对比关键规格、电气参数、封装、生命周期状态、价格和供货情况，以确定最适合您设计需求的元器件。
Microchip Technology
ATMEGA644-20AU - 8-Bit AVR MCU 64KB Flash 20MHz | Microchip
ATMEGA644-20AU Nrnd规格对比
| 参数 | ATMEGA644A-AU | ATMEGA644-20AU |
|---|---|---|
| 品牌 | Microchip Technology | Microchip Technology |
| 分类 | Microcontrollers | Microcontrollers |
| 生命周期状态 | 有效 | 不推荐新设计 |
| 库存状态 | 有库存 | 有库存 |
| 单价（USD） | $5.40 | $4.96 |
| Core Architecture | 8-bit AVR enhanced RISC | 8-bit AVR RISC |
| Program Memory Size | 64 KB Flash (32K x 16) | — |
| Program Memory Type | ISP FLASH with Read-While-Write | — |
| EEPROM | 2 KB | 2 KB |
| SRAM | 4 KB | 4 KB |
| Maximum CPU Speed | 20 MHz (20 MIPS) | — |
| Supply Voltage Range | 1.8 V to 5.5 V | — |
| General Purpose I/O | 32 lines | — |
| Working Registers | 32 general purpose registers | — |
| USART | 2 | — |
| Timer/Counters | 3 (with compare modes and PWM) | 2 x 8-bit, 1 x 16-bit with compare and PWM modes |
| ADC | 8-channel, 10-bit | 8-channel, 10-bit successive approximation |
| Serial Interfaces | TWI (2-wire, I2C-compatible), SPI | — |
| Real Time Counter | Yes (RTC) | — |
| 封装 | 44-TQFP (10x10 mm) | 44-TQFP (10x10 mm) |
| 安装类型 | Surface Mount | Surface Mount |
| 工作温度 | -40C to +85C (Industrial) | — |
| Device Series | ATmega644A | — |
| Program Memory | — | 64 KB In-System Programmable Flash (32K x 16) |
| 最大时钟频率 | — | 20 MHz |
| Throughput | — | Up to 20 MIPS at 20 MHz |
| Operating Voltage Range | — | 2.7 V to 5.5 V |
| General Purpose I/O Pins | — | 32 |
| General Purpose Working Registers | — | 32 |
| USART Interfaces | — | 2 |
| Two-Wire Serial Interface | — | 1 (byte-oriented, I2C compatible) |
| SPI Interface | — | 1 (master/slave) |
| 工作温度范围 | — | -40C to +85C |
| Debug Interface | — | JTAG (IEEE 1149.1) with on-chip debug |
| Sleep Modes | — | 6 (Idle, ADC Noise Reduction, Power-save, Power-down, Standby, Extended Standby) |
| RoHS 状态 | — | Compliant |