TCA5405 Output Expander

By Texas Instruments 49

TCA5405 Output Expander

Texas Instruments' 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 1.65 V 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 1.5 mm x 1.5 mm RUG uQFN package.

  • 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
  • Cell phones
  • PDAs
  • Portable media players
  • MP3 players
  • Portable instrumentation

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