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Texas Instruments TCA9535 Low-Power I/O Expander

Texas Instruments TCA9535 Low-Power I/O Expander is a 24-pin device that provides 16 bits of general-purpose parallel input and output (I/O) expansion for the two-line bidirectional I2C bus or SMBus protocol. The device can operate with a power supply voltage ranging from 1.65V to 5.5V. The Texas Instruments TCA9535 consists of two 8-bit configurations (input or output selection), input port, output port, and polarity inversion (active-high or active-low operation) registers. When the power is turned on, the I/Os are configured as inputs. The system master can enable the I/Os as inputs or outputs by writing to the I/O configuration bits.

Features

  • I2C to parallel port expander
  • Wide power supply voltage range of 1.65V to 5V
  • Low standby current consumption
  • An open-drain active-low interrupt output
  • 5V tolerant I/O ports
  • 400kHz fast I2C bus
  • Polarity inversion register
  • Address by three hardware address pins for the use of up to eight devices
  • Latched outputs with high-current drive capability for directly driving LEDs
  • Latch-up performance exceeds 100mA per JESD 78, Class II
  • ESD protection exceeds JESD 22
    • 2000V human-body model (A114-A)
    • 1000V charged-device model (C101)

Applications

  • Servers
  • Routers (telecom switching equipment)
  • Personal computers
  • Personal electronics (for example, gaming consoles)
  • Industrial automation
  • Products with GPIO-limited process

Functional Block Diagram

Block Diagram - Texas Instruments TCA9535 Low-Power I/O Expander
Publicerad: 2016-08-24 | Uppdaterad: 2022-03-11