74181

The 74181 is designed as 4-bit high speed parallel arithmetic logic unit (ALU). Controlled by the four functio select inputs (S0-S3) and the mode control input (M), it can perform all the 16 possible logic operations on active high or active low operands.

The three features of the 74181. (1)Provides 16 arthmetic operations: ADD, SUBTRACT, COMPARE, DOUBLE, plus 12 other arithmetic operations. (2)Provides all 16 logic operations of two variables: exclusive-OR, compare, AND, NAND, NOR, OR, plus 10 other logic operations. (3)Full lookahead carry for high speed arithmetic operation on long words. Those are all the main features.

Some absolute maximum ratings of the 74181 have been concluded into several points as follow. (1)Its supply voltage would be 7.0V. (2)Its input voltage would be from -0.5V to +5.5V. (3)Its input current would be from -30mA to +5mA. (4)Its voltage applied to output in high output state would be from -0.5V to +Vcc. (5)Its operating free-air temperature range would be from 0°C to 70°C. It should be noted that stresses above those listed in absolute maximum ratings may cause permanent damage to device.

Also some electrical characteristics of the 74181 are concluded as follow. (1)Its high level output voltage would be min 2.4V and typ 3.4V. (2)Its low level output voltage would be max 0.4V. (3)Its input clamp voltage would be max -1.5V. (4)Its input current at maxium input voltage would be max 1.0mA. (5)Its high level input current would be max 40uA. (6)Its low level input current would be max -1.6mA. (7)Its high level output current would be max 250uA. (8)Its short-circuit output current would be min -18mA and max -57mA. (9)Its supply current total would be typ 88mA and max 140mA. (10)Its prooagation delay Cn to Cn+4 would be max 18ns. (11)Its propagation delay Cn to F outputs would be max 19ns. (12)Its propagation delay A or B inputs to G output would be max 19ns. And so on. If you have any question or suggestion or want to know more information about the 74181  please contact us for details. Thank you!