74LS280

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 improved performance. The LS280 has buffered inputs to lower the drive requirements to one LS unit load. http://onsemi.com LOW POWER SCHOTTKY Generates Either Odd or Even Parity for Nine Data Lines Typical Data-to-Output Delay of only 33 ns Cascadable for n-Bits Can Be Used To Upgrade Systems Using MSI Parity Circuits Typical Power Dissipation = 80 mW 14 1 INPUTS VCC 14 F 13 F G H 1 G 2 H 3 NC I E 12 E D 11 D C 10 C B 9 B A 8 PLASTIC N SUFFIX CASE 646 A ∑ ∑ EVEN ODD 14 1 4 5 6 7 I ∑ ∑ GND INPUT EVEN ODD OUTPUTS INPUTS SOIC D SUFFIX CASE 751A FUNCTION TABLE NUMBER OF INPUTS A THRU 1 THAT ARE HIGH 0, 2, 4, 6, 8 1, 3, 5, 7, 9 H = HIGH Level, L = LOW Level OUTPUTS ∑EVEN H L ∑ODD L H ORDERING INFORMATION Device SN74LS280N Package 14 Pin DIP 14 Pin Shipping 2000 Units/Box 2500/Tape & Reel GUARANTEED OPERATING RANGES Symbol VCC TA IOH IOL Parameter Supply Voltage Operating Ambient Temperature Range Output Current – High Output Current – Low Min 4.75 0 Typ 5.0 25 Max 5.25 70 – 0.4...