SEMICONDUCTOR TECHNICAL DATA High-Performance Silicon-Gate CMOS The MC54/74HC688 is identical in pinout to the LS688. The device inputs are compatible with standard CMOS outputs; with pullup resistors, they are compatible with LSTTL outputs. The HC688 compares two 8-bit binary or BCD words and indicates whether or not they are equal. By using the Cascade Input, two or more of the devices may be cascaded to compare words of more than 8 bits. * * * * * * 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 A High Noise Immunity Characteristic of CMOS Devices In Compliance with the Requirements Defined by JEDEC Standard No. 7A * Chip Complexity: 116 FETs or 29 Equivalent Gates J SUFFIX CERAMIC PACKAGE CASE 732-03 20 1 N SUFFIX PLASTIC PACKAGE CASE 738-03 20 1 DW SUFFIX SOIC PACKAGE CASE 751D-04 20 1 ORDERING INFORMATION MC54HCXXXJ MC74HCXXXN MC74HCXXXDW Ceramic Plastic SOIC LOGIC DIAGRAM A0 A1 A2 DATA WORD A INPUTS A3 A4 A5 A6 A7 B0 B1 DATA WORD B INPUTS B2 B3 B4 B5 B6 B7 CASCADE INPUT 2 4 PIN ASSIGNMENT 6 CASCADE INPUT A0 1 20 VCC 2 19 A=B 13 B0 3 18 15 A1 4 17 A7 B1 5 16 B6 8 11 17 19 3 A=B OUTPUT 5 7 9 12 6 15 A6 7 14 B5 A3 8 13 A5 B3 9 12 B4 10 11 GND 14 16 18 FUNCTION TABLE 1 Inputs PIN 20 = VCC PIN 10 = GND 10/95 Motorola, Inc. 1995 A2 B2 1 REV 6 Output Data Words Cascade A=B A=B A>B A