74LS28 PDF File ( Datasheet )

SN54, 74LS28 QUAD 2-INPUT NOR BUFFER QUAD 2-INPUT NOR BUFFER VCC 14 13 12 11 10 9 8 LOW POWER SCHOTTKY 1 2 3 4 5 6 7 GND 14 1 J SUFFIX CERAMIC CASE 632-08 14 1 N SUFFIX PLASTIC CASE 646-06 14 1 D SUFFIX SOIC CASE 751A-02 ORDERING INFORMATION SN54LSXXJ SN74LSXXN SN74LSXXD Ceramic Plastic SOIC GUARANTEED OPERATING RANGES Symbol VCC TA IOH IOL Supply Voltage Operating Ambient Temperature Range Output Current High Output Current Low Parameter 54 74 54 74 54, 74 54 74 Min 4.5 4.75

SN74LS280 9-Bit Odd, Even Parity Generators, Checkers The SN74LS280 is a Universal 9-Bit Parity Generator , Checker. It features odd , even outputs to facilitate either odd or even parity. By cascading, the word length is easily expanded. The LS280 is designed without the expander input implementation, but the corresponding function is provided by an input at Pin 4 and the absence of any connection at Pin 3. This design permits the LS280 to be substituted for the LS180 which results in improve