TCA6408A Datasheet, PDF (4/35 Pages) Texas Instruments – LOW-VOLTAGE 8-BIT I2C AND SMBus I/O EXPANDER WITH INTERRUPT OUTPUT, RESET, AND CONFIGURATION REGISTERS

TCA6408A
SCPS192C – APRIL 2009– REVISED JULY 2009............................................................................................................................................................. 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
TCA6408A.
Table 1. Voltage Translation
V_CCI
(SCL AND SDA OF I²C MASTER)
(V)
1.8
1.8
1.8
1.8
2.5
2.5
2.5
2.5
3.3
3.3
3.3
3.3
5
5
5
5
V_CCP
(P PORT)
(V)
1.8
2.5
3.3
5
1.8
2.5
3.3
5
1.8
2.5
3.3
5
1.8
2.5
3.3
5
4
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