Translate Voltages for GPIO

Example GPIO Voltage Translation Block Diagram

Design Considerations

Translators enable communication when devices have mismatched logic voltage levels
Prevent damage to devices that cannot support higher voltage inputs
Improve data rates over discrete translation solutions
Protect controller while peripheral is not connected
[FAQ] What are the power sequencing requirements for the translation device?
[FAQ] What should be done with unused I/O pins of the level translator devices?
Need additional assistance? Ask our engineers a question on the TI E2E™ Logic Support Forum

Recommended Parts

Part Number	AEC-Q100	Bits	Voltage Translation Range	Features
SN74LXC8T245		8	1.1 V–5.5 V	Schmitt-trigger inputs Dynamic pulldowns on I/O V_CC Isolation and V_CC Disconnect
SN74LXC8T245-Q1	✓	8	1.1 V–5.5 V
TXU0104		4	1.1 V–5.5 V	Schmitt-trigger inputs Integrated pulldown resistors V_CC Isolation and V_CC Disconnect
TXU0104-Q1	✓	4	1.1 V–5.5 V
SN74AXC2T45		2	0.65 V–3.6 V	Direction controlled Glitch-free power supply sequencing V_CC Isolation
SN74AXC2T45-Q1	✓	2
SN74AXC1T45		1
SN74AXC1T45-Q1	✓	1

For more devices, browse through the online parametric tool where you can choose between the three types of translators.

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