The HC590A contain an 8-bit binary Counter SN54HC590A SN74HC590A that feeds an 8-bit storage Register The storage Register has parallel outputs. Separate Clocks are provided for both the binary Counter and storage Register The binary Counter features direct clear (CCLR) and count-enable (CCKEN) inputs. A ripple-carry output (RCO) is provided for cascading. Expansion is easily accomplished for two stages by connecting RCO of the first stage to CCKEN of the second stage. Cascading for larger count chains CAN be accomplished by connecting RCO of each stage to the Counter Clock (CCLK) input of the following stage. Both CCLK and the Register Clock (RCLK) input are positive-edge triggered. If both Clocks are connected together, the Counter state is always one count ahead of the Register Internal circuitry prevents clocking from the Clock enable. The SN54HC590A is characterized for operation over the full military temperature range of 55C to 125C. The SN74HC590A is characterized for operation from 40C to 85C. By Texas Instruments
Part Manufacturer Description Datasheet Samples
SN54HC590AJ Texas Instruments 8-Bit Binary Counters With 3-State Output Registers 16-CDIP -55 to 125
SN54HC590A 's PackagesSN54HC590A 's pdf datasheet

SN54HC590A Pinout, Pinouts
SN54HC590A pinout,Pin out
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