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54LS49 series datasheets. Manufacturer: National Semiconductor.

54LS490DMQB7 V, dual decade counter in 16-pin DIL package. Operational temperature range from -55°C to 125°C.Datasheet*)
54LS490FMQB7 V, dual decade counter in 16-pin DIL package. Operational temperature range from -55°C to 125°C.Datasheet*)
DM74LS490M7 V, dual decade counter in 16-pin DIL package. Operational temperature range from 0°C to 70°C.Datasheet*)
DM74LS490N7 V, dual decade counter in 16-pin DIL package. Operational temperature range from 0°C to 70°C.Datasheet*)
54LS49DMQB7 V, BCD to 7-segment decoder in 14-pin DIL package. Operational temperature range from -55°C to 125°C.Datasheet*)
54LS49FMQB7 V, BCD to 7-segment decoder in 14-pin DIL package. Operational temperature range from -55°C to 125°C.Datasheet*)
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