Part # 74AC191 datasheet

Part Manufacturer: Fairchild Semiconductor

Fairchild Semiconductor

Part Description: 74AC191 Up Down Counter with Preset and Ripple Clock

Part Details:

74AC November 1988 Revised November 1999 191 Up/ 74AC191 Dow Up/Down Counter with Preset and Ripple Clock n Count General Description Features The AC191 is a reversible modulo 16 binary counter. It fea- s ICC reduced by 50% tures synchronous counting and asynchronous presetting. s High speed--133 MHz typical count frequency er The preset feature allows the AC191 to be used in pro- s grammable dividers. The Count Enable input, the Terminal Synchronous counting w Count output and the Ripple Clock output make possible a s Asynchronous parallel load it variety of methods of implementing multistage counters. In s Cascadable h the counting modes, state changes are initiated by the ris- Pre s Outputs source/sink 24 mA ing edge of the clock. set Ordering Code: and Order Number Package Number Package Description R 74AC191SC M16A 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150" Narrow Body ippl 74AC191SJ M16D 16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide 74AC191MTC MTC16 16-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide e Cl 74AC191PC 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 code. ock Logic Symbols

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74AC191.pdf Datasheet