●Description
●This 16-bit I/O expander for the two-line bidirectional bus (I2C) is designed to provide general-purpose
●remote I/O expansion for most microcontroller families via the I2C interface [serial clock (SCL) and serial data (SDA)].
●Features
●• Operating Power-Supply Voltage Range of 1.65 V to 5.5 V
●• Allows Bidirectional Voltage-Level Translation and GPIO Expansion Between:
●– 1.8-V SCL/SDA and 1.8-V, 2.5-V, 3.3-V, or 5-V P Port
●– 2.5-V SCL/SDA and 1.8-V, 2.5-V, 3.3-V, or 5-V P Port
●– 3.3-V SCL/SDA and 1.8-V, 2.5-V, 3.3-V, or 5-V P Port
●– 5-V SCL/SDA and 1.8-V, 2.5-V, 3.3-V, or 5-V P Port
●• I2C to Parallel Port Expander
●• Low Standby Current Consumption of 1 μA
●• Schmitt-Trigger Action Allows Slow Input Transition and Better Switching Noise Immunity at the SCL and SDA Inputs
●– Vhys = 0.18 V Typ at 1.8 V
●– Vhys = 0.25 V Typ at 2.5 V
●– Vhys = 0.33 V Typ at 3.3 V
●– Vhys = 0.5 V Typ at 5 V
●• 5-V Tolerant I/O Ports
●• Active-Low Reset (RESET) Input
●• Open-Drain Active-Low Interrupt (INT) Output
●• 400-kHz Fast I2C Bus
●• Input/Output Configuration Register
●• Polarity Inversion Register
●• Internal Power-On Reset
●• Power Up With All Channels Configured as Inputs
●• No Glitch On Power Up
●• Noise Filter on SCL/SDA Inputs
●• Latched Outputs With High-Current Drive Maximum 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)
