Features and benefits
• I2C-bus to parallel port expander
• 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 Port P
– 2.5 V SCL/SDA and 1.8 V, 2.5 V, 3.3 V or 5 V Port P
– 3.3 V SCL/SDA and 1.8 V, 2.5 V, 3.3 V or 5 V Port P
– 5 V SCL/SDA and 1.8 V, 2.5 V, 3.3 V or 5 V Port P
• 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 (typical) at 1.8 V
– Vhys = 0.25 V (typical) at 2.5 V
– Vhys = 0.33 V (typical) at 3.3 V
– Vhys = 0.5 V (typical) at 5 V
• 5 V tolerant I/O ports
• Active LOW reset input (RESET)
• Open-drain active LOW interrupt output (INT)
• 400 kHz Fast-mode I2C-bus
• 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 25 mA 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)
– 1000 V Charged-Device Model (C101)
• Packages offered: HVQFN16, TSSOP16, XQFN16, XFBGA16 (1.6 mm × 1.6 mm × 0.5 mm), X2QFN16 (LGA,
Land Grid Array) 1.6 mm x 1.6 mm x 0.35 mm
2.1 Agile I/O features
• Software backward compatible with PCA6408A with interrupts disabled at power-up
• Pin-to-pin drop-in replacement for PCA6408A
• Output port configuration: bank selectable push-pull or open-drain output stages
• Interrupt status: read-only register identifies the source of an interrupt
• Bit-wise I/O programming features:
– Output drive strength: four programmable drive strengths to reduce rise and fall times in low-capacitance
applications
– Input latch: Input Port register values changes are kept until the Input Port register is read
– Pull-up/pull-down enable: floating input or pull-up/pull-down resistor enable
– Pull-up/pull-down selection: 100 kΩ pull-up/pull-down resistor selection
– Interrupt mask: mask prevents the generation of the interrupt when input changes state to prevent spurious interrupts