Higher Voltage Interfacing

Higher Voltage Inputs

A 74HC4049 or 74HC4050 can be powered at 2V to 6V and will accept input voltages up to +16V  (pin out is same, 74HC4049 just inverts the logic state).

4049 is basically the same but consumes a bit more current and has a min supply voltage of 3.5V.

Higher Voltage Outputs

Low side / open drain

SN7417 and SN7407

6 channel
SN7417 5V powered logic buffer which has open drain outputs that can drive loads up to 15V @ 30mA.
SN7407 will do up to 30V @ 40mA and is cheaper

Logic To Darlington (open drain driving of higher voltages, relay switching etc)

ULN2803C

Logic To open drain darlington driver array. 0V driving of higher voltages, relay switching etc (max 50V 500mA).
3.3V and 5V compatible inputs.

MIC2981

8 outputs.  Logic input (3/5V).  5V-50V 500mA rated outputs (de-rate for multiple outputs used at the same time). Be aware that the transistor drive outputs will drop 1.7V up to around 2.2V depending on the load.

High side

TLE75080-ESH

8 channel, Recomended 7-18V, extended operation 18-28V. Absolute max 28V. Max 330mA/500mA
SPI interface. 3.3V/5V operation. Overcurrent protection. 

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