SN74161N datasheet, a 25.6 KB PDF for the synchronous presettable 4-bit binary counter with asynchronous clear, supplied in plastic DIP (N suffix).

Datasheet for the SN74163N, a synchronous 4-bit binary counter with synchronous clear, in the N-suffix plastic DIP package.

Component datasheet covering the IRFP240 MOSFET, supplied as a 104 KB PDF readable in any PDF viewer.

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.