PCA9670BS Datasheet, PDF
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- Description The PCA9670 provides general-purpose remote I/O expansion via the two-wirebidirectional I²C‑bus (serial clock (SCL), serial data (SDA)). The devices consist of eight quasi-bidirectional ports, 1 MHz 30 mA drive I²C‑businterface, three hardware address inputs and a reset input operating between 2.3 V and5.5 V. 1 MHz I²C‑bus Fast‑mode Plus (Fm+) can support PWM dimming of LEDs, andhigher I²C‑bus drive 30 mA allows more devices to be on the bus without the need for busbuffers. The quasi-bidirectional port can be independently assigned as an input to monitorinterrupt status or keypads, or as an output to activate indicator devices such as LEDs.The system master can read from the input port or write to the output port through a singleregister The low current consumption of 2.5 μA (typical, static) is great for mobile applications andthe latched output ports have 25 mA high current sink drive capability for directly drivingLEDs. The PCA9670 has three hardware address pins and allows up to 64 of these PCA9670I/O expanders on the same I²C‑bus without the need for bus buffers, supporting up to512 I/Os (for example, 512 LEDs). The internal Power-On Reset (POR) and active LOW hardware reset pin (RESET)initialize the I/Os as inputs with a weak internal pull-up 100 μA current source.
- Part No. PCA9670BS
- Manufacturer 恩智浦-NXP
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