The TPT29555A is a 16-bit GPIO expander with interruption and weak pull-up resistors for I2C-bus applications. The power supplier voltage range is from 1.65 V to 5.5 V, allowing the TPT29555A to interconnect with 1.8-V microcontrollers.

Features
? I2C-Bus to 16-Bit GPIO Expander
? Operating Power Supply Voltage from 1.65 V to 5.5 V
? Low Standby Current Consumption:
– 3.0 μA (typical at 5 V VCC)
– 1.5 μA (typical at 3.3 V VCC)
? 400-kHz Fast-Mode I2C-Bus
? 5-V Tolerant I/Os
? Open-Drain Active Low Interrupt Output (INT)
? Configurable Slave Address with 3 Address Pins
? Internal Power-on Reset
? Power-up with all Channels Configured as Inputs with Weak Pull-up Resistors
? Latch-up Performance Exceeds 200 mA per JESD 78
? ESD Protection Exceeds JESD 22
– 4000-V Human Body Model
– 1500-V Charged-Device Mode

性能對比與選型指導
與同類產品PCA9555相比，TPT29555A在以下方面具有明顯優勢：

• 工作電壓下限降低30%（1.65V vs 2.3V）
• 待機功耗減少52%（1.5μA vs 3.1μA @3.3V）
• ESD防護等級提升100%（4000V vs 2000V HBM）