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 VCC.

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

74HC688D属于集成电路（IC） > 比较器。安世半导体(中国)有限公司制造生产的74HC688D比较器逻辑比较器系列产品用于根据以数字格式表示的信息比较结果来生成输出；身份型比较器指示两个输入是否相同，幅度型比较器还指示两个输入不相同时哪个较大。它们不同于比较两个模拟输入幅度的器件，后者称为线性比较器且单独分类。