PCF8574T vs PCA9557PW Comparison
Detailed side-by-side comparison of PCF8574T by NXP Semiconductors and PCA9557PW 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 Obsolete
Specification Comparison
| Parameter | PCF8574T | PCA9557PW |
|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors |
| Category | Interface ICs | Interface ICs |
| Lifecycle Status | Obsolete | Active |
| 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] | — |
| Package | SOIC-16 (T suffix) | 16-pin TSSOP |
| Operating Temperature | -40C to +85C (industrial) | [DATA_NEEDED: operating temperature range] |
| MSL Level | 1 (unlimited floor life) | — |
| RoHS Status | 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 |
| Supply Current | — | [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] |
| Mounting Type | — | Surface mount |
| REACH Status | — | unknown |
| AEC-Q100 Qualification | — | unknown |