TCA6416 Datasheet, PDF (4/31 Pages) Texas Instruments – LOW-VOLTAGE 16-BIT I2C AND SMBus I/O EXPANDER WITH INTERRUPT OUTPUT, RESET, AND CONFIGURATION REGISTERS

TCA6416
LOW-VOLTAGE 16-BIT I²C AND SMBus I/O EXPANDER
WITH INTERRUPT OUTPUT, RESET, AND CONFIGURATION REGISTERS
SCPS153 – DECEMBER 2007
www.ti.com
Voltage Translation
Table 1 shows how to set up V_CC levels for the necessary voltage translation between the I²C bus and the
TCA6416.
Table 1. Voltage Translation
V_CCI (SDA AND SCL OF I²C
MASTER)
(V)
V_CCP (P PORT)
(V)
1.8
1.8
1.8
2.5
1.8
3.3
1.8
5
2.5
1.8
2.5
2.5
2.5
3.3
2.5
5
3.3
1.8
3.3
2.5
3.3
3.3
3.3
5
5
1.8
5
2.5
5
3.3
5
5
4
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