PCA9555DBQR

远程16位I2C和SMBus I / O扩展器，带有中断输出和配置寄存器 REMOTE 16-BIT I2C AND SMBus I/O EXPANDER WITH INTERRUPT OUTPUT AND CONFIGURATION REGISTERS

Description

This 16-bit I/O expander for the two-line bidirectional bus I2C is designed for 2.3-V to 5.5-V VCC operation. It provides general-purpose remote I/O expansion for most microcontroller families via the I2C interface [serial clock SCL, serial data SDA].

The PCA9555 consists of two 8-bit Configuration input or output selection, Input Port, Output Port, and Polarity Inversion active high or active low operation registers. At power on, the I/Os are configured as inputs. The system master can enable the I/Os as either inputs or outputs by writing to the I/O configuration bits. The data for each input or output is kept in the corresponding Input or Output register. The polarity of the Input Port register can be inverted with the Polarity Inversion register. All registers can be read by the system master.

Features

• Low Standby-Current Consumption of 1 μA Max

• I2C to Parallel Port Expander

• Open-Drain Active-Low Interrupt Output

• 5-V Tolerant I/O Ports

• Compatible With Most Microcontrollers

• 400-kHz Fast I2C Bus

• Address by Three Hardware Address Pins for Use of up to Eight Devices

• Polarity Inversion Register

• Latched Outputs With High-Current Drive Capability for Directly Driving LEDs

• Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II

• ESD Protection Exceeds JESD 22

   – 2000-V Human-Body Model A114-A

   – 200-V Machine Model A115-A

   – 1000-V Charged-Device Model C101