74F191 series datasheets. Manufacturer: National Semiconductor.

74F191PC Up/Down Binary Counter with Preset and Ripple Clock Datasheet*) 74F191SC Up/Down Binary Counter with Preset and Ripple Clock Datasheet*) 74F191SJ Up/Down Binary Counter with Preset and Ripple Clock Datasheet*) 54F191 Up/Down Binary Counter with Preset and Ripple Clock Datasheet*) 54F191FM Up/Down Binary Counter with Preset and Ripple Clock Datasheet*) 54F191LM Up/Down Binary Counter with Preset and Ripple Clock Datasheet*) 74F191 Up/Down Binary Counter with Preset and Ripple Clock Datasheet*) There are other manufacturers for this components. For more information please check 74F191 (Fairchild Semiconductor) 74F191 (Philips Semiconductors)

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