MC145453

The MC145453 liquid-crystal display driver consists of a 36-stage seial-in/paralle-out shift register with 33 latches and drivers.Each package drives up to 33 nonmultiplexed LCD segments.MC145453 may be paralled to increase the number of segements driven.The input format is a start bit(high), followed by 33 display bits, plus a trailing bits(dont cares).A high start bit, after propagating to the last shift register stage, triggers generation of an internal load signal which transfer the 33 display bits into latches.An internal reset clears only the shift register which readies the MC145453 for the next bit stream.

Features of of the MC145453 are:(1)on-chip oscillator provides 50 percent duty cycle backplane drive; (2)no external load signal required; (3)operating voltage range: 3 V to 10 V; (4)TTL-compatible inputs may be driven with CMOS; (5)advantages over multiplexed LCD systems: wider viewing angle; optimum contrast at low voltage; better legibility at exterme temperature.

The absolute maximum ratings of the MC145453 can be summarized as:(1): DC supply voltage(VDD) is -0.5 V to +11.0 V; (2): DC input voltage(Vin) is -0.5 V to VDD+0.5 V; (3): DC output voltage(Vout) is -0.5 V to VDD+0.5 V; (4): DC input current, per pin(Iin) is ±20 mA; (5): DC output current, per pin(Iout) is ±25 mA; (6): power dissipation current, VDD and VSS pins(ICC) is ±50 mA; (7): storage temperature(Tstg) is -65 to +150; (8): lead temperature(10 seconds soldering)(TL) is 260.