Datasheet revision 5 for the SN74LS669, a synchronous 4-bit up/down binary counter from the 74LS low-power Schottky TTL family, as a 74.2 KB PDF.

Revision 5 datasheet for the SN74LS569A, a synchronous 4-bit up/down binary counter with 3-state outputs from the 74LS low-power Schottky TTL line, in a 108 KB PDF.

Datasheet for the SN74LS490, revision 5 of the document, stored as a compact 52.6 KB PDF.