LB1273R

The circuit construction of LB1273R is a darlington transistor array with six units, most suitable for printer hammer drive, lamp, and relay drive. With built-in protective diodes against negative inputs, it is advantageous in designing drive circuits for printey calculators and cash registers.

The features of LB1273R can be summarized as (1)since six units are included, it is suitadle for 18-digit printers; (2)the load current is considerably large 230mA and is, thus, suitable for thermal printers.

The absolute maximum ratings and allowable operating conditions of LB1273R are (1)output supply voltage VOUT: - 0.3 to + 20V; (2)input supply voltage VIN: - 40 to + 20V; (3)output inflow current IOUT per unit: 150 mA; (4)instantaneous output inflow current iop per unit duty=60% pulse width (2ms: 230 mA; (5)GND pin inflow current I7: -700 m.A; (6)GND pin instantaneous outflow current l7p duty = 60%  pulse width (2ms: 1.4 A; (7)allowable power dissipation Pd max: 1.15W; (8)instan taneous allowable power consumption: Pulse width must be less than 2msec. The percentage of all of 6 units being ON must be less than 50% for 100ms: 2.3W; (9)junction temperature TJ: 125°C; (10)operating temperature Topr: - 20 to + 70°C; (11)storage temperature Tstg: - 40 to + 125°C; (12)output supply voltage VOUT: 20V; (13)input level voltage VIH output terminal current= 150mA: 15 to 20A; (14)input level voltage VIL, output terminal current= 100A:-35 to +1V; (15)load resistance RL No inductance components should be included: 80 ohm (min).