8 Benefits of Using TCAL I/O Expanders Versus TCA I/O Expanders

TCAL I/O expanders are direct upgrades to the TCA I/O expanders. TCAL is pin-to-pin compatible with TCA of the same part number. For example, TCAL6408 is the direct upgrade to the TCA6408. Here are some of the benefits of using a TCAL I/O expander over a TCA I/O expander.

• Low voltage support (1.08 V – 3.6 V) for next generation processors
• Reduced BoM and board space providing reduced costs
• Newer process technology resulting in improved cost competitive designs
• Supports up to Fast-Mode Plus data rates (1 MHz) allowing increased data throughput (TCA – characterized up to 400 kHz)
• Reduced current consumption for power critical systems
• System adaptability for easy prototyping
• Fixes VCCP/VCCI power supply sequencing issue present in TCA level translating I/O expanders
• Agile I/O Features:
  • Programmable output drive strength
  • Latchable inputs
  • Mask Interrupt and Interrupt status register
  • Programmable output configuration
  • Selectable input pull-up or pull-down registers

Table 8-1 shows the current available TCAL I/O expanders offered by TI.