10-bit Counter - National Semiconductor

The ten-bit Counter DM54LS491 74LS491 CAN count up, count down, set, and load 2 LSBs, 2 MSBs and 6 middle bits high or low as a group. All operations are synchronous with the Clock SET over- rides LOAD, COUNT and HOLD. LOAD overrides COUNT. COUNT is conditional on CIN, otherwise it holds. All outputs are enabled when OE is low, otherwise HIGH-Z. The 24 mA IOL outputs are suitable for driving RAM/PROM address lines in Video graphics systems. By National Semiconductor Corporation
DM54LS491 's PackagesDM54LS491 's pdf datasheet

DM54LS491 Pinout, Pinouts
DM54LS491 pinout,Pin out
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