SN54LS85

The SN54LS85 is designed as a 4-bit magnitude camparator which compares two 4-bit words (A, B), each word having four parallel inputs (A0A3, B0B3); A3, B3 being the most significant inputs.

SN54LS85 has three features. (1)Easily expandable. (2)Binary or BCD comparison. (3)Oa>b, Oa<b and Oa=b outputs available. Those are all the main features.

Some guaranteed operating ranges of SN54LS85 have been concluded into several points as follow. (1)Its supply voltage range would be min 4.5V and typ 5.0V and max 5.5V. (2)Its operating ambient temperature range would be min -55°C and typ 25°C and max 125°C. (3)Its output current high level would be max -0.4mA. (4)Its output current low level would be max 4.0mA.

Also some DC characteristics of SN54LS85 are concluded as follow. (1)Its input high voltage would be min 2.0V with conditions of guaranteed input high voltage for all inputs. (2)Its input low voltage would be max 0.7V with conditions of guaranteed input low voltage for all inputs. (3)Its input clamp diode voltage would be typ -0.65V and max -1.5V with condition of Vcc=min, Iin=-18mA. (4)Its output high voltage would be min 2.5V and typ 3.5V. (5)Its output low voltage would be typ 0.25V and max 0.4V with condition of Iol=4.0mA. (6)Its input high current would be max 20uA for A<B, A>B and would be max 60uA for other inputs with condition of Vcc=max and Vin=2.7V and it would be max 0.1mA for A<B, A>B and would be max 0.3mA for other inputs with condition of Vcc=max and Vin=7.0V. (7)Its input low current would be max -0.4mA for A<B, A>B and would be max -1.2mA for other inputs. (8)Its short circuit current would be min -20mA and max -100mA with condition of Vcc=max. (9)Its power supply current would be max 20mA with condition of Vcc=max. And so on. If you have any question or suggestion or want to know more information about SN54LS85 please contact us for details. Thank you!