NXP PCA9501BS,118 I2C/SMBus GPIO expander, 8 I/O, 400 kHz, 2.5V-3.6V, push-pull outputs, interrupt output, EEPROM, POR, -40°C to 85°C, 20-HVQFN (5x5 mm).
| Parameter | Value |
|---|---|
| Output type | Push-Pull |
| Mounting type | Surface Mount |
| Voltage | 2.5V ~ 3.6V |
| Current - output source (Sink) | 100µA, 25mA |
| Frequency | 400 kHz |
| Interface | I²C, SMBus |
| Operating temperature | -40°C ~ 85°C |
| Package | Tape & Reel (TR); Cut Tape (CT) |
| Features | EEPROM, POR |
| Number of i (O) | 8 |
| Case | 20-VQFN Exposed Pad |
| Interrupt output | Yes |
Integrated EEPROM stores user data. Power-on reset circuit holds I/Os in a known state until supply stabilises.
Active lifecycle status. No last-time-buy notice or end-of-life risk. ROHS3 compliant.
The PCA9501BS adds an integrated EEPROM and a power-on reset (POR) circuit. The PCA9500BS omits these features but is otherwise pin-compatible and functionally identical for basic GPIO expansion. If you need non-volatile storage for configuration or a clean power-up state without an external supervisor, choose the PCA9501BS; otherwise, the PCA9500BS is a cost-reduced alternative.
Yes. The supply voltage range of 2.5V to 3.6V covers the 3.3V rail directly. The I2C and GPIO pins are 3.3V-tolerant, so no level shifter is needed when the host microcontroller runs at 3.3V.