MC74HC251

MOTOROLA SEMICONDUCTOR TECHNICAL DATA 8-Input Data Selector/ Multiplexer with 3-State Outputs High–Performance Silicon–Gate CMOS The MC54/74HC251 is identical in pinout to the LS251. The device inputs are compatible with standard CMOS outputs; with pullup resistors, they are compatible with LSTTL outputs. This device selects one of the eight binary Data Inputs, as determined by the Address Inputs. The Output Enable pin must be a low level for the selected data to appear at the outputs. If Output Enable is high, both the Y and the Y outputs are in the high–impedance state. This 3–state feature allows the HC251 to be used in bus–oriented systems. The HC251 is similar in function to the HC151 which does not have 3–state outputs. Output Drive Capability: 10 LSTTL Loads Outputs Directly Interface to CMOS, NMOS, and TTL Operating Voltage Range: 2 to 6 V Low Input Current: 1 µA High Noise Immunity Characteristic of CMOS Devices In Compliance with the Requirements Defined by JEDEC Standard No. 7A Chip Complexity: 134 FETs or 33.5 Equivalent Gates MC54/74HC251 J SUFFIX CERAMIC PACKAGE CASE 620–10 1 16 16 1 N SUFFIX PLASTIC PACKAGE CASE 648–08 16 1 D SUFFIX SOIC PACKAGE CASE 751B–05 ORDERING INFORMATION MC54HCXXXJ MC74HCXXXN MC74HCXXXD Ceramic Plastic SOIC PIN ASSIGNMENT D3 D2 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 VCC D4 D5 D6 D7 A0 A1 A2 LOGIC DIAGRAM D1 D0 Y D0 D1 D2 DATA INPUTS D3 4 3 2 1 5 Y DATA OUTPUTS 6 Y Y OUTPUT ENABLE GND D4 15 D5 14 D6 13 D7 12...