TCA6408

www.ti.com TCA6408 LOW-VOLTAGE 8-BIT I2C AND SMBus I/O EXPANDER WITH INTERRUPT OUTPUT, RESET, AND CONFIGURATION REGISTERS SCPS151C – FEBRUARY 2007 – REVISED JUNE 2007 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 PW PACKAGE (TOP VIEW) 5-V Tolerant I/O Ports Active-Low Reset Input (RESET) Open-Drain Active-Low Interrupt Output (INT) 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) RGT PACKAGE (TOP VIEW) ADDR VC...