PCF8574DW vs PCA9557D 对比
详细并排对比 PCF8574DW 出自 Texas Instruments 和 PCA9557D 出自 Texas Instruments。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。
Texas Instruments
PCA9557D - 8-Bit I2C/SMBus I/O Expander with Reset | TI (Tape & Reel)
PCA9557D ✗ 停产规格对比
| 参数 | PCF8574DW | PCA9557D |
|---|---|---|
| 品牌 | Texas Instruments | Texas Instruments |
| 分类 | Interface ICs | Interface ICs |
| 生命周期状态 | 有效 | 停产 |
| 库存状态 | 有库存 | 有库存 |
| 单价（USD） | $1.10 | $0.71 |
| Product Type | 8-bit I2C I/O expander | — |
| Number of I/O Ports | 8 | — |
| I2C Maximum Clock Frequency | 100 kHz | — |
| Operating Supply Range | 2.5 V to 6 V VCC | — |
| Product-Page Supply Range | 2.5 V to 5.5 V | — |
| 接口 | I2C two-line bidirectional bus | I2C, SMBus |
| Port Architecture | Quasi-bidirectional I/O | — |
| Interrupt Output | Open-drain | — |
| Standby Current | 10 µA maximum | — |
| 封装 | 16-SOIC | 16-SOIC (DR, 7.5 mil pitch) |
| 引脚数量 | 16 pins | — |
| 安装类型 | Surface mount | Surface Mount |
| Application Category | I/O expander | — |
| Bus | I2C/SMBus | — |
| Port Names | P0 through P7 | — |
| Manufacturer | Texas Instruments | — |
| Compliance Information | [DATA_NEEDED: RoHS status] | — |
| 工作温度 | [DATA_NEEDED: operating temperature range] | -40 C to +85 C |
| Number of I/O Bits | — | 8 |
| Bus Frequency (Max) | — | 400 kHz |
| Supply Voltage (VCC) | — | 2.3 V to 5.5 V |
| Standby Current (Max) | — | 1 uA |
| Output Drive Current per Bit | — | [DATA_NEEDED: per-bit source/sink mA rating] |
| I/O Voltage Tolerance | — | 5.5 V tolerant |
| Reset Input | — | Active-low hardware RESET + software reset (general call) |
| Interrupt Output (INT) | — | Yes, open-drain |
| Slave Address Pins | — | A0, A1, A2 (3 pins, 8 addresses within family) |
| MSL 等级 | — | 1 (unlimited floor life) |
| RoHS 状态 | — | Compliant |
| Lead-Free | — | Yes |
| Configuration Registers | — | Input/output direction registers, polarity inversion |