PCF8574T vs PCA9557PW 对比
详细并排对比 PCF8574T 出自 NXP Semiconductors 和 PCA9557PW 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 | PCF8574T | PCA9557PW |
|---|---|---|
| 品牌 | NXP Semiconductors | NXP Semiconductors |
| 分类 | Interface ICs | Interface ICs |
| 生命周期状态 | Obsolete | 有效 |
| Product Type | 8-bit I/O Expander | 8-bit parallel I/O expander |
| Bus Interface | I2C (Standard 100 kHz, Fast 400 kHz) | I2C/SMBus |
| 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] | — |
| 封装 | SOIC-16 (T suffix) | 16-pin TSSOP |
| 工作温度 | -40C to +85C (industrial) | [DATA_NEEDED: operating temperature range] |
| MSL 等级 | 1 (unlimited floor life) | — |
| RoHS 状态 | Compliant | unknown |
| Process Technology | Silicon CMOS | — |
| 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] |
| 安装类型 | — | Surface mount |
| REACH Status | — | unknown |
| AEC-Q100 Qualification | — | unknown |