LB1272

The circuit configuration of LB1272 is a 6-unit Darlington transistor array consisting of NPN transistors and is ideally suited for use in printer hammer driving, lamp or relay driving applications. With the built-in protective diodes against negative inputs, this IC offers advantages to the driver circuit design of electronic calc ulator with printer and cash resister, etc. which also use display tubes.

The features of LB1272 can be summarized as (1)ideally suited for 18-digit printer because of built-in 6 units; (2)with built-in protective diodes against negative inputs; (3)ideally suited for printer mechanism with load current 85 mA.

The absolute maximum ratings of LB1272 are (1)output supply voltage VOUT: -0.3 to +22V; (2)input supply voltage VIN: -40 to +12V; (3)pin 8 supply voltage VCC: -0.3 to +20V; (4)output flow-in current IOUT per unit: 100 mA; (5)instantaneous output lOP per unit, duty=10%: 150 mA; (6)flow-in current pulse width< 20ms spark killer diode forward current lF(S): 150 mA; (7)GND pin flow-out current lGP: -900 to 0 mA; (8)pin 8 instantaneous flow-out current lCCP: -900 to 0 mA; (9)pin 8 flow-out current ICC: -600 to 0 mA; (10)allowable power dissipation Pd max: 770 mA; (11)operating temperature Topr: -20 to +80°C; (12)storage temperature Tstg: -40 to +125 °C.