54F191

www.DataSheet4U.com 54F 74F191 Up Down Binary Counter with Preset and Ripple Clock November 1994 54F 74F191 Up Down Binary Counter with Preset and Ripple Clock General Description The ’F191 is a reversible modulo-16 binary counter featuring synchronous counting and asynchronous presetting The preset feature allows the ’F191 to be used in programmable dividers The Count Enable input the Terminal Count output and Ripple Clock output make possible a variety of methods of implementing multistage counters In the counting modes state changes are initiated by the rising edge of the clock Features Y Y Y Y High-Speed 125 MHz typical count frequency Synchronous counting Asynchronous parallel load Cascadable Commercial 74F191PC Military Package Number N16E Package Description 16-Lead (0 300 Wide) Molded Dual-In-Line 16-Lead Ceramic Dual-In-Line 16-Lead (0 150 Wide) Molded Small Outline JEDEC 16-Lead (0 300 Wide) Molded Small Outline EIAJ 16-Lead Cerpack 20-Lead Ceramic Leadless Chip Carrier Type C 54F191DM (Note 2) 74F191SC (Note 1) 74F191SJ (Note 1) 54F191FM (Note 2) 54F191LM (Note 2) J16A M16A M16D W16A E20A Note 1 Devices also available in 13 reel Use suffix e SCX and SJX Note 2 Military grade device with environmental and burn-in processing Use suffix e DMQB FMQB and LMQB Logic Symbols Connection Diagrams Pin Assignment for DIP SOIC and Flatpak Pin Assignment for LCC TL F 9495–1 IEEE IEC TL F 9495 – 2 TL F 9495 – 3 TL F 9495–4 TRI-STATE is a registered trademark ...