DS1307 need a crystal too, and pullup resistors on the SCL/SDA lines.
DS3234 doesn't need any of that
http://pdfserv.maxim-ic.com/en/ds/DS3234.pdf
but is surface mount - so get an adapter (1.27mm pitch pads)
http://www.ebay.com/itm/2PK-SO-SOP-SOIC-SSOP-14-16-20-Pitch-0-65mm-and-1-27mm-DIP-Adapter-Converter-/170754392487?pt=LH_DefaultDomain_0&hash=item27c1c141a7