Contextual Info: T'HTOTb Q01S0S5 S12 Ordering number: EN 2846 i SA iYO LB1731 N o.2846 Monolithic Digital IC i High-Voltage, Current-Sink Output Driver Overview The LB1731 is a 4-channel high-voltage current sink output driver. Inputs are active-low CMOS/TTL logic-level, and outputs are high-voltage open-collector NPN Darlington pairs.