LB1745

The LB1745 is an octal high-voltage current source output driver with active-lovv inputs. High output drive capability for lovv input current is achieved with NPN Darlington-pair output drivers The LA1745 sources up to 500rnA from each driver at supply voltages of up to 50V. It is available in 18-pin plastic DIPs.

The features of LB1745 can be summarized as (1)eight independent darlington-pair driver circuits ; (2)high-voltage, high-current source ; (3)output clamp diodes ; (4)input protection diodes.

The absolute maximum ratings and allowable operating conditions at Ta= 25°C of LB1745 are (1)maximum supply voltage Vcc max: - 0.3 to + 50V ; (2)applied output voltage VOUT:- 0.3 to VCC V; (3)applied input voltage VIN: - 0.3 to VCC V ; (4)maximum output current Iout Per driver: -500 mA ; (5)clamp diode forward current IF: -500 mA ; (6)clamp diode reverse voltage VR :- 0.3 to + 50V; (7)allowable power dissipation Pd max: 1.13W; (8)operating temperature Topr :20 to + 75°C ; (9)storage temperature Tstg: - 40 to + 150°C ; (10)power supply voltage range Vcc: 4 to 50V; (11)input on-level voltage VION IOUT= - 350mA: 0 to VCC - 2.5V; (12)input off-level voltage VIOFF IOUTE >=- 50A VDD- 0.7 to VCC V