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3,000 pcs
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3000 pcs | On Request | 1 | On Request | On Request | On Request | On Request | 2026-02-16 21:33:16 |
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The NXP PCA9554AD,118 is a 16-pin CMOS device designed for I2C-bus/SMBus applications, offering 8 bits of General Purpose Parallel Input/Output (GPIO) expansion. It enhances microcontroller capabilities by providing additional I/O for devices like sensors, LEDs, and push buttons.
Key features include a wide operating supply voltage range of 2.3V to 5.5V, 5V tolerant I/Os, and a 400kHz maximum clock frequency. The device includes an 8-bit Configuration register for input/output selection, an Input Port register, an Output Port register, and a Polarity Inversion register. It also features an open-drain interrupt output that activates when an input state changes, signaling the system master.
This I/O expander is available in a 16-SOIC package, suitable for surface mounting. Its design incorporates features like individual I/O configuration, noise filters on SCL/SDA inputs, and an internal power-on reset for reliable operation. The PCA9554AD,118 is pin-to-pin compatible with the PCF8574 series, though software changes are required due to its enhancements.
Applications include ACPI power switches, sensor expansion, LED control, and general-purpose I/O expansion in embedded systems requiring efficient communication over I2C or SMBus interfaces.
| Qty | Low | High |
|---|---|---|
| 1+ | $1.15 | $1.15 |
Estimated market price range - modelled values for guidance only, not live distributor offers.
The PCA9554AD,118 operates from 2.3V to 5.5V.
The maximum clock frequency for the PCA9554AD,118 is 400 kHz.
The PCA9554AD,118 has 8 I/O pins.
The PCA9554AD,118 uses the I2C and SMBus interface.
The operating temperature range for the PCA9554AD,118 is -40°C to +85°C.
The PCA9554AD,118 is available in a 16-SOIC package.