| Distributor | Stock | Pricing | MOQ | PKG | Lead Time | Date Code | On Order Quantity | On Order Delivery | |
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3,355 pcs
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3355 pcs | On Request | 1 | On Request | On Request | On Request | On Request | On Request |
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The PCA9555AHF is a 16-bit general purpose input/output (GPIO) expander designed for I2C-bus and SMBus applications. It operates from a supply voltage range of 1.65V to 5.5V, making it suitable for low-voltage systems. The device features a 400kHz Fast-mode I2C interface, allowing efficient communication with a host controller.
Key electrical characteristics include a typical standby current of 1.0µA at 3.3V VDD and 1.5µA at 5V VDD, enabling low-power operation. Each I/O pin can sink up to 25mA, sufficient for directly driving LEDs. The I/O pins are 5V tolerant, providing compatibility with higher voltage logic levels. An open-drain active LOW interrupt output (INT) signals the host when input states change. Weak pull-up resistors are integrated on all I/O pins.
The PCA9555AHF is ideal for expanding the number of I/Os in microcontroller-based systems, particularly in portable and battery-powered devices. The device is offered in a package suitable for surface-mount assembly, though specific package details are not provided in the available data.
| Qty | Low | High |
|---|---|---|
| 1+ | $0.75 | $0.75 |
Estimated market price range - modelled values for guidance only, not live distributor offers.
The PCA9555AHF operates from 1.65V to 5.5V.
The PCA9555AHF supports 400kHz Fast-mode I2C-bus.
Typical standby current is 1.0µA at 3.3V VDD and 1.5µA at 5V VDD.
Each I/O pin can sink up to 25mA.
The PCA9555AHF has an open-drain active LOW interrupt output (INT).
Yes, the I/O pins are 5V tolerant.
The PCA9555AHF provides 16 I/O pins.