SN54LS385

The SN54LS385 is a general purpose adder/subtractor, which includes four independent adder/subtractor elements with common clock and clear. Each of the four independent sum outputs reflects its respective A and B input as a co ntrolled by S/A control.

Features of SN54LS385 are:(1)four synchronous elements in a single 20-pin package;(2)buffered clock and direct cle ar inputs;(3)independent two's-complment addition/subtraction.

The recommended operating conditions and electrical characteristics of the SN54LS385 can be summarized as: (1)su pply voltage: 4.5V min, 5V typ and 5.5V max; (2)high level output current: -400uA max; (3)low level output current: 4mA max; (4)clock frequency: 0MHz min and 30MHz max; (5)width of clock pulse 16ns min; (6)setup time: 10ns min; (7)hold time: 3ns min; (8)operating free-air temperature: -55 min and 125 max. Electrical characteristics: (1)high-level input voltage: 2V min; (2)low-level input voltage: 0.7V max; (3)input clamp voltage(VCC=min, I1=-18mA): -1.5V max; (4)supply current(Vcc=max): 48mA typ and 75mA max, etc.