74HC688D,653

74HC688 8-bit magnitude comparator Rev. 4 16 July 2021 Product data sheet 1. General description The 74HC688 is an 8-bit magnitude comparator. It performs comparisons of two 8-bit binary or BCD words. Inputs include clamp diodes. This enables the use of current limiting resistors to interface inputs to voltages in excess of V . CC 2. Features and benefits Compare two 8-bit words Wide supply voltage range from 2.0 to 6.0 V CMOS input levels CMOS low power dissipation High noise immunity Latch-up performance exceeds 100 mA per JESD 78 Class II Level B Complies with JEDEC standards JESD8C (2.7 V to 3.6 V) JESD7A (2.0 V to 6.0 V) ESD protection: HBM JESD22-A114-F exceeds 2000 V MM JESD22-A115-A exceeds 200 V Specified from -40 C to +85 C and from -40 C to +125 C 3. Ordering information Table 1. Ordering information Type number Package Temperature range Name Description Version 74HC688D 40 C to +125 C SO20 plastic small outline package 20 leads SOT163-1 body width 7.5 mm 74HC688PW 40 C to +125 C TSSOP20 plastic thin shrink small outline package 20 leads SOT360-1 body width 4.4 mmNexperia 74HC688 8-bit magnitude comparator 4. Functional diagram 2 P0 4 P1 6 P2 8 P3 11 P4 13 P5 15 P6 17 P7 P=Q 19 P7 3 Q0 5 Q1 Q7 7 Q2 9 Q3 P6 12 Q4 14 Q5 Q6 16 Q6 18 Q7 P5 E 1 aaa-028700 Q5 Fig. 1. Logic symbol P4 COMP 1 G1 Q4 2 0 4 P3 6 P=Q 8 Q3 P 11 13 P2 15 17 7 Q2 (P=Q) 1 19 3 0 P1 5 7 Q1 9 Q 12 P0 14 16 Q0 18 7 E aaa-028701 aaa-028702 Fig. 3. IEC logic symbol Fig. 2. Logic diagram 74HC688 All information provided in this document is subject to legal disclaimers. Nexperia B.V. 2021. All rights reserved Product data sheet Rev. 4 16 July 2021 2 / 13