描述 Description

INT can be connected to the interrupt input of a microcontroller. By sending an interrupt signal on this line, the remote I/O can inform the microcontroller if there is incoming data on its ports without having to communicate via the I2C bus. Thus, the PCA9535 can remain a simple slave device.

The device outputs (latched) have high-current drive capability for directly driving LEDs. The device has low current consumption.

Although pin-to-pin and I2C address compatible with the PCF8575, software changes are required due to the enhancements.

The PCA9535 is identical to the PCA9555, except for the removal of the internal I/O pullup resistor, which greatly reduces power consumption when the I/Os are held low.

Three hardware pins (A0, A1, and A2) are used to program and vary the fixed I2C address and allow up to eight devices to share the same I2C bus or SMBus. The fixed I2C address of the PCA9535 is the same as the PCA9555, PCF8575, PCF8575C, and PCF8574, allowing up to eight of these devices in any combination to share the same I2C bus or SMBus.

特性 Features

? 1μA 低待機(jī)電流消耗（最大值）
? I2C 至并行端口擴(kuò)展器
? 開漏電路低電平有效中斷輸出
? 可耐受 5V 電壓的 I/O 端口
? 兼容大多數(shù)微控制器
? 400kHz 快速 I2C 總線
? 針對(duì)多達(dá) 8 個(gè)器件使用的 3 個(gè)硬件地址引腳尋址
? 極性反轉(zhuǎn)寄存器
? 具有高電流驅(qū)動(dòng)能力的鎖存輸出，用于直接驅(qū)動(dòng) LED
? 閂鎖性能超過 100mA，符合 JESD 78 II 類規(guī)范的要求
? ESD 保護(hù)性能超過 JESD 22 規(guī)范要求
? 2000V 人體放電模型 (A114-A)
? 1000V 帶電器件模型 (C101)