74LS169.pdf Synchronous 4-Bit Up Down Binary Counter 54LS169 DM54LS169A DM74LS169A June 1989 54LS169 DM54LS169A DM74LS169A Synchronous 4-Bit Up Down Binary Counter General Description This synchronous presettable counter features an internal counting up and approximately equal to the low portion of carry look-ahead for cascading in high-speed counting ap- ……