SN74LS690 series datasheets. Manufacturer: Texas Instruments.

SN74LS690 Synchronous decade counters with output registers Datasheet*) SN74LS691 Synchronous binary counters with output registers Datasheet*) SN74LS691DW Synchronous binary counters with output registers Datasheet*) SN74LS691N Synchronous binary counters with output registers Datasheet*) SN74LS693 Synchronous binary counters with output registers Datasheet*) SN74LS693N Synchronous binary counters with output registers Datasheet*)

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