SN74LS280DR

Series:	74LS
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
Logic Type:	Parity Generator/Checker
Number of Circuits:	9-Bit
Current - Output High, Low:	400µA, 8mA
Voltage - Supply:	4.75V ~ 5.25V
Operating Temperature:	0°C ~ 70°C
Mounting Type:	Surface Mount
Package / Case:	14-SOIC (0.154", 3.90mm Width)
Supplier Device Package:	14-SOIC
Base Part Number:	74LS280

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The SN74LS280DR is a type of parity generator and checker, commonly used in the field of logic and computing. It provides a useful way to detect any errors in digital data transmissions, allowing the recipient to check if the data has been corrupted during transmission. It is also used in data processing and memory management, providing a helpful check for the accuracy of data.In terms of its features, the SN74LS280DR is equipped with two 19-bit data channels, a control input, and two error outputs (for even parity and odd parity). In addition, the chip includes two data registers and two control registers, allowing it to be used for simultaneous calculation and storage of data.Regarding its working principle, when data is received, the SN74LS280DR first calculates the check bits for each channel (a check bit is a single bit that can identify the correctness of the larger data set). These check bits are then stored in the chip\'s data registers, along with the original data. The control input allows the device to select either even parity or odd parity (this is done by setting the state of the control input high or low).Next, the parity checking process is initiated. Based on the set parity mode, the SN74LS280DR compares the check bits with the original data. If the total sum of all the bits is either even or odd (depending on the parity mode selected), then the parity check is successful and the device sends out an appropriate "ok" signal. If, however, the check bits do not match the original data, then the parity check fails and an appropriate "error" signal is sent.Overall, the SN74LS280DR is a versatile and powerful parity checker/generator for logic and computing applications. Due to its two data channels, two control registers, and two error outputs, the SN74LS280DR can provide an efficient and reliable way to check and detect errors in data transmission. In addition, it is easy to implement and configure, making it an ideal choice for data processing and memory management.

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