54LS190 Datasheet - National Semiconductor

54LS190, Synchronous 4-Bit Up/Down Counters

DM54LS190 DM74LS190 DM54LS191 DM74LS191 Synchronous 4-Bit Up Down Counters with Mode Control May 1989 DM54LS190 DM74LS190 DM54LS191 DM74LS191 Synchr.
These circuits are synchronous reversible up down counters The LS191 is a 4-bit binary counter and the LS190 is a BCD counter Synchronous operation is.

Applications

* Average propagation delay 20 ns Typical clock frequency 25 MHz Typical power dissipation 100 mW Connection Diagram Dual-In-Line-Package TL F 6405-1 Order Number DM54LS190J DM54LS191J DM54LS190W DM54LS191W DM74LS190M DM74LS191M DM74LS190N or DM74LS191N See NS Package Number J16A M16A N16A or W16A

54LS190-NationalSemiconductor.pdf