74F191 ,Up/Down Binary Counter with Preset and Ripple ClockFunctional DescriptionThe 74F191 is a synchronous up/down 4-bit binary allow the negative-going edg ..
74F191PC ,Up/Down Binary Counter with Preset and Ripple ClockFunctional DescriptionThe 74F191 is a synchronous up/down 4-bit binary allow the negative-going edg ..
74F191SC ,Up/Down Binary Counter with Preset and Ripple Clock74F191 Up/Down Binary Counter with Preset and Ripple ClockApril 1988Revised September 200074F191Up/ ..
74F191SCX ,Up/Down Binary Counter with Preset and Ripple ClockFunctional DescriptionThe 74F191 is a synchronous up/down 4-bit binary allow the negative-going edg ..
74F191SJ ,Up/Down Binary Counter with Preset and Ripple ClockFeaturesThe 74F191 is a reversible modulo-16 binary counter fea-
74F191
Up/Down Binary Counter with Preset and Ripple Clock
74F191 Up/Down Binary Counter with Preset and Ripple Clock April 1988 Revised September 2000 74F191 Up/Down Binary Counter with Preset and Ripple Clock General Description Features The 74F191 is a reversible modulo-16 binary counter fea-High-Speed—125 MHz typical count frequency turing synchronous counting and asynchronous presetting.Synchronous counting The preset feature allows the 74F191 to be used in pro- Asynchronous parallel load grammable dividers. The Count Enable input, the Terminal Cascadable 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 ris- ing edge of the clock. Ordering Code: Order Number Package Number Package Description 74F191SC M16A 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow 74F191SJ M16D 16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide 74F191PC N16E 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code. Logic Symbols Connection Diagram IEEE/IEC © 2000 DS009495
