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I'm looking for a 2 or 4 bit shift register that I can shift data into, and on the 5th shift into the device it will shift the previous data back out on the Dout.

I am looking for a shift register that acts a lot like the MAX6969 from Maxim, yet is smaller than that.

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have you tried looking in the 74xx series of logic? Pick your favorite flavor. 74HC194 and 74HC195 are 4-bit shift registers; 74HC174 (quad flip-flop) and 74HC175 (hex flip-flop) can be made into shift registers.

edit: based on your comments, why don't you use an HC594 (output) or HC597 (input)? They're 8-bit registers, easily cascadable to arbitrary lengths, compatible with a SPI interface as well as plain old clocking.

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  • \$\begingroup\$ I'm looking for something that allows me put several together in a daisy chain, much like the MAX6969 from Maxim whereby when I click on on Cin, 16 clock cycles later it shows up at Dout. So to have two of the same chips next to each other I can send out 32 bits of data, and both chips will now contain data. \$\endgroup\$
    – X-Istence
    Commented Dec 9, 2009 at 8:41

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