74HC590 Datasheet

8-bit binary counter with output register


The 74HC590 is an 8-bit binary counter with a storage register and 3-state outputs. The storage register has parallel (Q0 to Q7) outputs. The binary counter features a master reset counter (MRC) and count enable (CE) inputs. The counter and storage register have separate positive edge triggered clock (CPC and CPR) inputs. If both clocks are connected together, the counter state always is one count ahead of the register. Internal circuitry prevents clocking from the clock enable. A ripple carry output (RCO) is provided for cascading. Cascading is accomplished by connecting RCO of the first stage to CE of the second stage. Cascading for larger count chains can be accomplished by connecting RCO of each stage to the counter clock (CPC) input of the following stage. If both clocks are connected together, the counter state always is one count ahead of the register. 74HC590 Features Counter and register have independent clock inputsCounter has master resetComplies with JEDEC standard no. 7AMultiple package optionsESD protection:-HBM JESD22-A114E exceeds 2000 V-MM JESD22-A115-A exceeds 200 V-CDM JESD22-C101C exceeds 2000 VSpecified from -40 °C to +85 °C and from -40 °C to +125 °C


[{"Name":"Maximum Operating Temperature","Value":"+ 125 C "},{"Name":"Minimum Operating Temperature","Value":"- 40 C "},{"Name":"Logic Family","Value":"HC"},{"Name":"Logic Type","Value":"CMOS "},{"Name":"Number of Input Lines","Value":"1"},{"Name":"Number of Output Lines","Value":"8"},{"Name":"Propagation Delay Time","Value":"140 ns "},{"Name":"Output Type","Value":"3-State "},{"Name":"Supply Voltage - Max","Value":"6v"},{"Name":"Supply Voltage - Min","Value":"2v"}]

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