1FEATURES
• Operating Power-Supply Voltage Range of 1.65
V to 3.6 V
• Five Independent Push-Pull Outputs
• Single Input (DIN) Controls State of All
Outputs
• High-Current Drive Outputs 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)

APPLICATIONS
• Cell Phones
• PDAs
• Portable Media Players
• MP3 Players
• Portable Instrumentation

DESCRIPTION
The TCA5405 is a 5-bit output expander controlled using a single wire input. This device is ideal for portable
applications as it has a wide VCC range of 1.65V to 3.6 V. The TCA5405 uses a self-timed serial data protocol
with a single data input driven by a master device synchronized to an internal clock of that device. During a
Setup phase, the bit period is sampled, then the TCA5405 generates its own internal clock synchronized to that
of the Master device to sample the input over a five-bit-period Data Transfer phase and writes the bit states on
the parallel outputs after the last bit is sampled. The TCA5405 is available in an 8-pin 1.5mm x 1.5mm RUG
uQFN package.