TCA6424A Low-Voltage 24-Bit I2C and SMBus I/O Expander With Interrupt Output, Reset, and Configuration Registers

1 Features

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 P Port
- 2.5-V SCL/SDA and
  1.8-V, 2.5-V, 3.3-V, or 5-V P Port
- 3.3-V SCL/SDA and
  1.8-V, 2.5-V, 3.3-V, or 5-V P Port
- 5-V SCL/SDA and
  1.8-V, 2.5-V, 3.3-V, or 5-V P Port
I²C to Parallel port expander
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
- V_hys = 0.18 V Typ at 1.8 V
- V_hys = 0.25 V Typ at 2.5 V
- V_hys = 0.33 V Typ at 3.3 V
- V_hys = 0.5 V Typ at 5 V
5-V Tolerant I/O ports
Active-low reset input ( RESET)
Open-drain active-low interrupt output ( INT)
400-kHz Fast I²C Bus
Input/output configuration register
Polarity inversion register
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 high-current 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)
- 200-V Machine model (A115-A)
- 1000-V Charged-device model (C101)