4−Bit Magnitude Comparator

The MC14585B 4−Bit Magnitude Comparator is constructed with complementary MOS (CMOS) enhancement mode devices. The circuit has eight comparing inputs (A3, B3, A2, B2, A1, B1, A0, B0), three cascading inputs (A B), and three outputs (A B). This device compares two 4−bit words (A and B) and determines whether they are “less than”, “equal to”, or “greater than” by a high level on the appropriate output. For words greater than

4−bits, units can be cascaded by connecting outputs (A > B), (A B) on the least significant (first) comparator are connected to a low, a high, and a low, respectively.

Applications include logic in CPU’s, correction and/or detection of instrumentation conditions, comparator in testers, converters, and controls.

Features

•Diode Protection on All Inputs

•Expandable

•Applicable to Binary or 8421−BCD Code

•Supply Voltage Range = 3.0 Vdc to 18 Vdc

•Capable of Driving Two Low−Power TTL Loads or One Low−Power Schottky TTL Load over the Rated Temperature Range

•Can be Cascaded − See Figure 3

•Pb−Free Packages are Available*