Datasheet > PCA9670BS

PCA9670BS

更新时间： 2024-11-15 14:59:19

品牌	Logo	应用领域
恩智浦 - NXP		/
页数	文件大小	规格书
35页	786K
描述
Remote 8-bit I/O expander for Fm+ I2C-bus with reset

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PCA9670BS 数据手册

PCA9670

Remote 8-bit I/O expander for Fm+ I²C-bus with reset

Rev. 3 — 30 May 2013

Product data sheet

1. General description

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 master can read from the input port or write to the output port through a single

The low current consumption of 2.5 A (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 A current source.

2. Features and benefits

 I²C-bus to parallel port expander

 1 MHz I²C-bus interface (Fast-mode Plus I²C-bus)

 SDA with 30 mA sink capability for 4000 pF buses

 Operating supply voltage 2.3 V to 5.5 V with 5.5 V tolerant I/Os held to V_DDwith

100 A current source

 8-bit remote I/O pins that default to inputs at power-up

 Latched outputs with 25 mA sink capability for directly driving LEDs

 Total package sink capability of 200 mA

 Active LOW reset input

 Sixty-four programmable slave addresses using three address pins

 Readable device ID (manufacturer, device type, and revision)

 Software reset

 Low standby current (2.5 A typical)

 40 C to +85 C operation

12 3 4 5 6 7...35

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