PCA8574D vs PCF8574T Comparison
Detailed side-by-side comparison of PCA8574D by NXP Semiconductors and PCF8574T by NXP Semiconductors. Compare key specifications, electrical parameters, packaging, lifecycle status, pricing, and availability to determine the best component for your design requirements.
NXP Semiconductors
PCF8574T - 8-bit I2C I/O Expander, SOIC-16 | NXP Semiconductors
PCF8574T ObsoleteSpecification Comparison
| Parameter | PCA8574D | PCF8574T |
|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors |
| Category | USB Interface ICs | Interface ICs |
| Lifecycle Status | End of Life | Obsolete |
| Stock Status | In Stock | In Stock |
| Unit Price (USD) | $0.74 | $0.61 |
| Function | Remote 8-bit I/O expander for I2C-bus with interrupt | — |
| Number of I/O Ports | 8 quasi-bidirectional | — |
| Interface | 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 | — |
| Interrupt Output | Yes, open-drain INT with latched flag | Yes, open-drain INT pin |
| Power-on Reset | Yes, ports initialized high (input mode) | — |
| Operating Temperature | [DATA_NEEDED: operating temperature range] | -40C to +85C (industrial) |
| Package | SO16 (SOIC-16, SOT109-1) | SOIC-16 (T suffix) |
| Mounting Type | 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 | — |
| RoHS Status | [DATA_NEEDED: RoHS status] | Compliant |
| Lifecycle Status | End of Life (per NXP product page) | — |
| 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) |
| Output Current (drive LOW) | — | [DATA_NEEDED: sink current per pin mA] |
| Standby Current | — | [DATA_NEEDED: Istandby in uA] |
| MSL Level | — | 1 (unlimited floor life) |
| Process Technology | — | Silicon CMOS |