Design Files
Quick reference to our
design files types.
1 design file
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Models
PCA9670 IBIS model
- No Longer Manufactured
- PCA9670D
Remote 8-bit I/O expander for Fm+ I²C-bus with reset
- This page contains information on a product that is no longer manufactured (discontinued). Specifications and information herein are available for historical reference only.
The PCA9670 provides general-purpose remote I/O expansion via the two-wire bidirectional I²C‑bus (serial clock (SCL), serial data (SDA)).
The devices consist of eight quasi-bidirectional ports, 1 MHz 30 mA drive I²C‑bus interface, three hardware address inputs and a reset input operating between 2.3 V and 5.5 V. 1 MHz I²C‑bus Fast‑mode Plus (Fm+) can support PWM dimming of LEDs, and higher I²C‑bus drive 30 mA allows more devices to be on the bus without the need for bus buffers. The quasi-bidirectional port can be independently assigned as an input to monitor interrupt status or keypads, or as an output to activate indicator devices such as LEDs. The system controller can read from the input port or write to the output port through a single register
The low current consumption of 2.5 μA (typical, static) is great for mobile applications and the latched output ports have 25 mA high current sink drive capability for directly driving LEDs.
The PCA9670 has three hardware address pins and allows up to 64 of these PCA9670 I/O expanders on the same I²C‑bus without the need for bus buffers, supporting up to 512 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.
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Documentation
Quick reference to our documentation types.
1-5 of 13 documents
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Application Note
Driving stepper motors using NXP I2C-bus GPIO expanders
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User Guide
I2C-bus specification and user manual