Confused with A and B

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gonzosez

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I have a circuit for a "push pull" flasher using a LM 556 chip.
The drawing I have shows a LM 556 A and LM 556 B does this mean that I need 2 chips or just 1. None of the connections are to the same legs on the chip.
Thanks
Gonzosez
 
Probable the two 555 sections of one 556 chip.
**broken link removed**
Does the circuit pin-outs look like the datasheet?

Ken
 
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