PCF8574T vs PCA8574D 对比
详细并排对比 PCF8574T 出自 NXP Semiconductors 和 PCA8574D 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 | PCA8574D |
|---|---|---|
| 品牌 | NXP Semiconductors | NXP Semiconductors |
| 分类 | Interface ICs | USB Interface ICs |
| 生命周期状态 | Obsolete | 停产 |
| 库存状态 | 有库存 | 有库存 |
| 单价（USD） | $0.61 | $0.74 |
| Product Type | 8-bit I/O Expander | — |
| Bus Interface | I2C (Standard 100 kHz, Fast 400 kHz) | — |
| 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 | Yes, open-drain INT with latched flag |
| Output Current (drive LOW) | [DATA_NEEDED: sink current per pin mA] | — |
| Standby Current | [DATA_NEEDED: Istandby in uA] | — |
| 封装 | SOIC-16 (T suffix) | SO16 (SOIC-16, SOT109-1) |
| 工作温度 | -40C to +85C (industrial) | [DATA_NEEDED: operating temperature range] |
| MSL 等级 | 1 (unlimited floor life) | — |
| RoHS 状态 | Compliant | [DATA_NEEDED: RoHS status] |
| Process Technology | Silicon CMOS | — |
| 功能 | — | Remote 8-bit I/O expander for I2C-bus with interrupt |
| Number of I/O Ports | — | 8 quasi-bidirectional |
| 接口 | — | I2C-bus (SCL, SDA) |
| I2C Bus Speed | — | 400 kHz |
| Supply Voltage Range | — | 2.3 V to 5.5 V |
| Hardware Address Pins | — | 3 (A0, A1, A2) - 8 addresses |
| Power-on Reset | — | Yes, ports initialized high (input mode) |
| 安装类型 | — | Surface Mount |
| Ordering Suffixes | — | PCA8574D,512 (Reel 13 inch), PCA8574D,518 (Reel 7 inch) |
| Max Devices per Bus | — | 8 (PCA8574) or 16 with PCA8574A (128 I/Os total) |
| LED Driving | — | Direct drive, current-sink mode per family datasheet |
| 生命周期状态 | — | End of Life (per NXP product page) |