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TCA6408 Datasheet(PDF) 4 Page - Texas Instruments

Part # TCA6408
Description  LOW-VOLTAGE 8-BIT I2C AND SMBus I/O EXPANDER WITH INTERRUPT OUTPUT, RESET, AND CONFIGURATION REGISTERS
PDF  31 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TCA6408 Datasheet(HTML) 4 Page - Texas Instruments

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Voltage Translation
TCA6408
LOW-VOLTAGE 8-BIT I2C AND SMBus I/O EXPANDER
WITH INTERRUPT OUTPUT, RESET, AND CONFIGURATION REGISTERS
SCPS151C – FEBRUARY 2007 – REVISED JUNE 2007
Table 1 shows how to set up VCC levels for the necessary voltage translation between the I
2C bus and the
TCA6408.
Table 1. Voltage Translation
VCCI
VCCP
(SCL and SDA of I2C master)
(P Port)
(V)
(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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