74191 series datasheets. Manufacturer: National Semiconductor.

74191 Synchronous Up/Down 4-Bit Binary Counter with Mode Control Datasheet*) DM54191J Synchronous Up/Down 4-Bit Binary Counter with Mode Control Datasheet*) DM54191W Synchronous Up/Down 4-Bit Binary Counter with Mode Control Datasheet*) DM74191 Synchronous Up/Down 4-Bit Binary Counter with Mode Control Datasheet*) There are other manufacturers for this components. For more information please check 74191 (Fairchild Semiconductor)

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