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DM54LS190 series datasheets. Manufacturer: National Semiconductor.

DM54LS190J7 V, synchronous 4-bit up/down counter with mode control in 16-pin DIL package. Operational temperature range from -55°C to 125°C.Datasheet*)
DM54LS190W7 V, synchronous 4-bit up/down counter with mode control in 16-pin DIL package. Operational temperature range from -55°C to 125°C.Datasheet*)
DM54LS191J7 V, synchronous 4-bit up/down counter with mode control in 16-pin DIL package. Operational temperature range from -55°C to 125°C.Datasheet*)
DM54LS191W7 V, synchronous 4-bit up/down counter with mode control in 16-pin DIL package. Operational temperature range from -55°C to 125°C.Datasheet*)
DM74LS190M7 V, synchronous 4-bit up/down counter with mode control in 16-pin DIL package. Operational temperature range from 0°C to 70°C.Datasheet*)
DM74LS190N7 V, synchronous 4-bit up/down counter with mode control in 16-pin DIL package. Operational temperature range from 0°C to 70°C.Datasheet*)
DM74LS191M7 V, synchronous 4-bit up/down counter with mode control in 16-pin DIL package. Operational temperature range from 0°C to 70°C.Datasheet*)
DM74LS191N7 V, synchronous 4-bit up/down counter with mode control in 16-pin DIL package. Operational temperature range from 0°C to 70°C.Datasheet*)
DM54LS190Synchronous 4-Bit Up/Down Counters with Mode ControlDatasheet*)
DM54LS191Synchronous 4-Bit Up/Down Counters with Mode ControlDatasheet*)
DM74LS190Synchronous 4-Bit Up/Down Counters with Mode ControlDatasheet*)
DM74LS191Synchronous 4-Bit Up/Down Counters with Mode ControlDatasheet*)
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