Decoupling capacitors for a multiplexer chip

Other Hardware General Electronics
1

I've got myself a 74HC157 multiplexer chip for my project, this is being used to switch between pwm signal coming out of an Arduino and pwm signal coming out of a radio control plane receiver, the signal eventually goes to some servos.

Here's the data sheet for anyone interested
http://www.nxp.com/documents/data_sheet/74HC_HCT157.pdf

My question is what size of decoupling capacitor should I be putting on the VCC of this chip, most people I have asked have said choosing decoupling caps is more of an art than a science but I'm not exactly well practised in this :(.

Could someone recommend a good size for this or possibly a good guide on how to choose caps for when I need to do the same thing in future, and also are there any other obvious components I should require before adding this to my circuit?

Thanks in advance

2

0.1uF ceramic cap on each VCC/AVCC pin of every device.
For example, on this board there are 13 ICs, and 16 decoupling caps - the '328P has 3, on VCC - AVCC - Aref.

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3

50V rated parts are fine and usually very inexpensive:
http://www.dipmicro.com/store/C5K10-50
Buy a bag of 100, 200, be set for quite a few projects.

4

Wow thank you! that's perfect will go grab some now.