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74HC191 series datasheets. Manufacturer: Philips Semiconductors.

74HC191DPresettable synchronous 4-bit binary up/down counterDatasheet*)
74HC191DBPresettable synchronous 4-bit binary up/down counterDatasheet*)
74HC191NPresettable synchronous 4-bit binary up/down counterDatasheet*)
74HC191PWPresettable synchronous 4-bit binary up/down counterDatasheet*)
74HC191UPresettable synchronous 4-bit binary up/down counterDatasheet*)
74HCT191DPresettable synchronous 4-bit binary up/down counterDatasheet*)
74HCT191NPresettable synchronous 4-bit binary up/down counterDatasheet*)
74HCT191UPresettable synchronous 4-bit binary up/down counterDatasheet*)
74HC191Presettable synchronous 4-bit binary up/down counterDatasheet*)
74HCT191Presettable synchronous 4-bit binary up/down counterDatasheet*)
There are other manufacturers for this components. For more information please check
74HC191 (Texas Instruments)
Click here to download 74HC191 Datasheet
Click here to download Datasheet
*)

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