PCF8574PW vs PCA9500PW Comparison
Detailed side-by-side comparison of PCF8574PW by Texas Instruments and PCA9500PW by NXP Semiconductors. Compare key specifications, electrical parameters, packaging, lifecycle status, pricing, and availability to determine the best component for your design requirements.
Texas Instruments
PCF8574PW - 8-bit I2C I/O Expander 20-TSSOP | Texas Instruments (Tape & Reel)
PCF8574PW ✓ Active
Specification Comparison
| Parameter | PCF8574PW | PCA9500PW |
|---|---|---|
| Brand | Texas Instruments | NXP Semiconductors |
| Category | Interface ICs | Interface ICs |
| Lifecycle Status | Active | Active |
| Function | I/O Expander | — |
| Number of I/O | 8 | — |
| Interface | I2C (SMBus compatible) | — |
| Clock Frequency (Max) | 100 kHz | — |
| I2C Address Base | 0x20 (PCF8574A: 0x38) | — |
| Supply Voltage (VCC) | 2.5 V to 6 V | — |
| Supply Current (Standby) | 2.5 uA typical | — |
| Interrupt Output | Yes (active-low INT) | — |
| Hardware Address Pins | 3 (A0, A1, A2) | — |
| Max Devices on Bus | 8 (16 combined with PCF8574A) | — |
| Output Drive (Source/Sink) | 25 mA / 25 mA per I/O | — |
| I/O Type | Quasi-bidirectional (no direction register) | — |
| Package | 20-pin TSSOP (PW) | 16-pin TSSOP |
| Operating Temperature | -40 C to +85 C | — |
| Mounting Type | Surface Mount | Surface mount |
| RoHS Status | Compliant | — |
| MSL Level | 1 (unlimited floor life) | — |
| Product Type | — | 8-bit I2C-bus and SMBus I/O port expander with EEPROM |
| Number of I/O Pins | — | 8 pins |
| I/O Direction Control | — | Independent input or output configuration per pin |
| I/O Port Type | — | Quasi-bidirectional |
| Integrated EEPROM Capacity | — | 2 kbit |
| Bus Interface | — | I2C-bus and SMBus |
| Maximum Bus Frequency | — | 400 kHz |
| Supply Voltage Range | — | 2.5 V to 3.6 V |
| Operating Temperature Range | — | -40 °C to +85 °C |
| Hardware Address Inputs | — | 3 address pins |
| Maximum Devices on One Bus | — | 8 devices |
| GPIO and EEPROM Addressing | — | Two separate devices visible to the bus master |
| Reference Interface | — | PCF8574-compatible configuration method |
| RoHS Compliance | — | [DATA_NEEDED: verified RoHS status] |
| REACH Compliance | — | [DATA_NEEDED: verified REACH status] |
| Automotive Qualification | — | [DATA_NEEDED: AEC-Q100 qualification status] |