CD74HC158 Datasheet | Texas Instruments

The CD54HC158 and CD54/74HC157, CD54/74HCT157, CD54/74HC158, CD54/74HCT158 CD74HC158 are obsolete and no longer are supplied. Data sheet acquired from Harris Semiconductor SCHS153C September 1997 - Revised October 2003 High-Speed CMOS Logic Quad 2-Input Multiplexers [ /Title (CD74H C157, CD74H CT157, CD74H C158, CD74H CT158) /Subject (High Speed Features Description - mon Select Inputs - Separate Enable Inputs - Buffered inputs and Outputs - Fanout (Over Temperature Range) - Standard Outputs - - - 10 LSTTL Loads - Bus Driver Outputs - - . . . 15 LSTTL Loads - Wide Operating Temperature Range . . . -55o C to 125o C - Balanced Propagation Delay and Transition Times - Significant Power Reduction pared to LSTTL Logic ICs The ’HC157, ’HCT157, ’HC158, and ’HCT158 are quad 2input multiplexers which select four bits of data from two sources under the control of a mon Select input (S). The Enable input (E) is active Low. When (E) is High, all of the outputs in the 158, the inverting type, (1Y-4Y) are forced High and in the 157, the non-inverting type, all of the outputs (1Y-4Y) are forced Low, regardless of all other input conditions. Moving data from two groups of registers to four mon output buses is a mon use of these devices. The state of the Select input determines the particular register from which the data es. They can also be used as function generators. - HC Types - 2V to 6V Operation - High Noise Immunity: NIL = 30%, NIH = 30%of VCC at VCC = 5V - HCT Types - 4.5V to 5.5V Operation - Direct LSTTL Input Logic patibility, VIL= 0.8V (Max), VIH = 2V...