MC74HCT157A

MOTOROLA SEMICONDUCTOR TECHNICAL DATA Quad 2-Input Data Selector/Multiplexer with LSTTL-Compatible Inputs High–Performance Silicon–Gate CMOS The MC74HCT157A is identical in pinout to the LS157. This device may be used as a level converter for interfacing TTL or NMOS outputs to High Speed CMOS inputs. This device routes 2 nibbles (A or B) to a single port (Y) as determined by the Select input. The data is presented at the outputs in noninverted form. A high level on the Output Enable input sets all four Y outputs to a low level. The HCT157A is similar in function to the HC257 which has 3–state outputs. Output Drive Capability: 10 LSTTL Loads TTL NMOS Compatible Input Levels Outputs Directly Interface to CMOS, NMOS and TTL Operating Voltage Range: 4.5 to 5.5 V Low Input Current: 1.0 µA In Compliance with the Requirements Defined by JEDEC Standard No. 7A Chip Complexity: 102 FETs or 25.5 Equivalent Gates LOGIC DIAGRAM A0 NIBBLE A INPUTS A1 A2 A3 B0 NIBBLE B INPUTS B1 B2 B3 2 5 11 14 4 3 6 10 13 PIN 16 = VCC PIN 8 = GND SELECT OUTPUT ENABLE 1 15 7 9 12 Y0 Y1 Y2 Y3 DATA OUTPUTS MC74HCT157A N SUFFIX PLASTIC PACKAGE CASE 648–08 1 16 16 1 D SUFFIX SOIC PACKAGE CASE 751B–05 ORDERING INFORMATION MC74HCTXXXAN MC74HCTXXXAD Plastic SOIC PIN ASSIGNMENT SELECT A0 B0 Y0 A1 B1 Y1 GND 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 VCC OUTPUT ENABLE A3 B3 Y3 A2 B2 Y2 FUNCTION TABLE Inputs Output Enable H L L Select X L H Outputs Y0 – Y3 L A0 – A3 B0 – B3 ÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎ ÎÎÎ Î...