Part # 74F191 datasheet

Part Manufacturer: Fairchild Semiconductor

Fairchild Semiconductor

Part Description: 74F191 Up Down Binary Counter with Preset and Ripple Clock

Part Details:

74F191 Up/Do April 2007 74F191 tm wn Binar Up/Down Binary Counter with Preset and Ripple Clock Features General Description High-Speed--125MHz typical count frequency The 74F191 is a reversible modulo-16 binary counter y Counter with Preset and Ripple Cloc Synchronous counting featuring synchronous counting and asynchronous pre- Asynchronous parallel load setting. The preset feature allows the 74F191 to be usedin programmable dividers. The Count Enable input, the Cascadable Terminal Count output and Ripple Clock output makepossible a variety of methods of implementing multistagecounters. In the counting modes, state changes are initi-ated by the rising edge of the clock. Ordering Information Order Package Number 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 Device also available in Tape and Reel. Specify by appending suffix letter "X" to the ordering number. k Logic Symbols Connection Diagram IEEE/IEC ©1988 Fairchild Semiconductor Corporation 74F191 Rev. 1.0.2 74F191 Up/Do Unit Loading/Fan Out U.L. Input IIH / IIL Pin Names Description HIGH / LOW Output IOH / IOL CE Count Enable Input (Active LOW) 1.0 / 3.0 20µA / -1.8mA

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74F191.pdf Datasheet