74LS90 Datasheet - National Semiconductor

74LS90 Decade and Binary Counters

Each of these monolithic counters contains four masterslave flip-flops and additional gating to provide a divide-bytwo counter and a three-stage binary counter for which the count cycle length is divide-by-five for the ’LS90 and divideby-eight for the ’LS93 All of these counters have a gated zero re.

74LS90 Features

* Y Y Typical power dissipation 45 mW Count frequency 42 MHz Connection Diagrams (Dual-In-Line Packages) TL F 6381

* 1 Order Number DM74LS90M or DM74LS90N See NS Package Number M14A or N14A TL F 6381

* 2 Order Number DM74LS93M or DM74LS93N See NS Package Number M14A or N14A C199

74LS90_NationalSemiconductor.pdf