PCA9557PW vs PCF8574T 对比
详细并排对比 PCA9557PW 出自 NXP Semiconductors 和 PCF8574T 出自 NXP Semiconductors。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。
NXP Semiconductors
PCF8574T - 8-bit I2C I/O Expander, SOIC-16 | NXP Semiconductors
PCF8574T Obsolete规格对比
| 参数 | PCA9557PW | PCF8574T |
|---|---|---|
| 品牌 | NXP Semiconductors | NXP Semiconductors |
| 分类 | Interface ICs | Interface ICs |
| 生命周期状态 | 有效 | Obsolete |
| 库存状态 | 有库存 | 有库存 |
| 单价（USD） | $0.00 | $0.61 |
| Product Type | 8-bit parallel I/O expander | 8-bit I/O Expander |
| Bus Interface | I2C/SMBus | I2C (Standard 100 kHz, Fast 400 kHz) |
| VCC Operating Voltage | 2.3 V to 5.5 V | — |
| I2C/SMBus Maximum Frequency | 400 kHz | — |
| Input Port | 8-bit | — |
| Output Port | 8-bit | — |
| IO0 Output Type | High-impedance open-drain output | — |
| Parallel I/O Count | 8 I/O | — |
| 电源电流 | [DATA_NEEDED: supply current] | — |
| Input Logic Levels | [DATA_NEEDED: input logic levels] | — |
| Output Logic Levels | [DATA_NEEDED: output logic levels] | — |
| I2C Address | [DATA_NEEDED: I2C address] | — |
| 工作温度 | [DATA_NEEDED: operating temperature range] | -40C to +85C (industrial) |
| 封装 | 16-pin TSSOP | SOIC-16 (T suffix) |
| 安装类型 | Surface mount | — |
| RoHS 状态 | unknown | Compliant |
| REACH Status | unknown | — |
| AEC-Q100 Qualification | unknown | — |
| Supply Voltage (VCC) | — | 2.5 V to 6 V |
| Number of I/O Pins | — | 8 (quasi-bidirectional, P0-P7) |
| I2C Address Bits | — | 3 (A0, A1, A2) |
| Base Address | — | 0x20 (PCF8574) / 0x38 (PCF8574A) |
| Addressable Devices per Bus | — | 8 (addresses 0x20-0x27) |
| Interrupt Output | — | Yes, open-drain INT pin |
| Output Current (drive LOW) | — | [DATA_NEEDED: sink current per pin mA] |
| Standby Current | — | [DATA_NEEDED: Istandby in uA] |
| MSL 等级 | — | 1 (unlimited floor life) |
| Process Technology | — | Silicon CMOS |