Part Number	DM74LS90N Datasheet
Manufacturer	National Semiconductor
Overview	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 divi. s Typical power dissipation 45 mW s Count frequency 42 MHz Ordering Code: Order Number Package Number Package Description DM74LS90M M14A 14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-120, 0.150 Narrow DM74LS90N N14A 14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.30.