DESCRIPTION
The HCF4063B is a monolithic integrated circuit fabricated in Metal Oxide Semiconductor
technology available in DIP and SOP packages. The HCF4063B is a low power 4-bit magnitude
comparator designed for use in computer and logic applications that require the comparison of
two 4-bit words. This logic circuit determines whether one 4-bit word (Binary or BCD) is "less
than", "equal to" or "greater than" a second 4 bit word. The HCF4063B has eight comparing inputs
(A3, B3 through A0, B0), three outputs (AB) and three cascading inputs (AB) that permit system s designers to expand the comparator function to 8, 12, 16...4N bits. When a single HCF4063B is used the cascading inputs are connected as follows :
(AB) = low.
For words longer than 4 bits, HCF4063B device may be cascaded by connecting the outputs of the
less-significant comparator to the corresponding cascading inputs of the more significant
comparator. Cascading inputs (AB) on the least significant comparator are
connected to a low, a high, and a low level, respectively.

■ QUIESCENT CURRENT SPECIFIED UP TO 20V
■ STANDARD B-SERIES OUTPUT DRIVE
■ EXPANSION TO 8-16....4 N BITS BY CASCADING UNIT
■ MEDIUM SPEED OPERATION : COMPARES TWO 4-BIT WORDS IN 250ns (Typ.) at 10V
■ 5V, 10V AND 15V PARAMETRIC RATINGS
■ INPUT LEAKAGE CURRENT II= 100nA (MAX) AT VDD= 18V TA= 25°C
■ 100% TESTED FOR QUIESCENT CURRENT
■ MEETS ALL REQUIREMENTS OF JEDEC JESD13B " STANDARD SPECIFICATIONS FOR DESCRIPTION OF B SERIES CMOS DEVICES"