MC14585B

Application

* Diode Protection on All Inputs
* Expandable
* Applicable to Binary or 8421BCD Code
* Supply Voltage Range = 3.0 Vdc to 18 Vdc
* Capable of Driving Two Lowpower TTL Loads or One Lowpower Schottky TTL Load over the Rated Temperature Range
* Can be Cascaded See Fig. 3


Pinout




Specifications

Symbol	Parameter	Value	Unit
VDD	DC Supply Voltage Range	0.5 to +18.0	V
Vin,Vout	Input or Output Voltage Range(DC or Transient)	0.5 to VDD + 0.5	V
Iin,Iout	Input or Output Current(DC or Transient)per Pin	±10	mA
PD	Power Dissipation, per Package (Note 3.)	500	mW
TA	Ambient Temperature Range	55 to +125
Tstg	Storage Temperature Range	65 to +150
TL	Lead Temperature(8Second Soldering)	260

Description

The MC14585B 4Bit 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, A = B, and A > B), and three outputs (A < B, A = B, and A > B). MC14585B compares two 4bit 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 4bits, units of MC14585B can be cascaded by connecting outputs (A > B), (A < B), and (A = B) to the corresponding inputs of the next significant comparator. Inputs (A < B), (A = B), and (A > B) on the least significant (first) comparator are connected to a low, a high, and a low, respectively.


Applications of MC14585B include logic in CPU's, correction and/or detection of instrumentation conditions, comparator in testers, converters, and controls.