Ordering number : ENN6235 CMOS IC LC75844M 1/4 Duty General-Purpose LCD Driver Overview Package Dimensions unit: mm The LC75844M is a 1/4 duty general-purpose LCD driver 3204-MFP36S that can be used for frequency display in electronic tuners under the control of a microcontroller. The LC75844M LC75844M can drive an LCD with up to 88 segments directly. The 36 19 LC75844M can also control up to 4 general-purpose output ports. Since the LC75844M uses separate power supply systems for the LCD drive block and the logic block, the LCD driver block power-supply voltage can be set to any voltage in the range 2.7 to 6.0 volts, regardless of the logic block power-supply voltage. Features 1 18 0.15 Support for 1/4 duty 1/2 bias or 1/4 duty 1/3 bias drive 15.3 of up to 88 segments under serial data control. Serial data input supports CCB format communication with the system controller. 0.35 0.8 0.85 Serial data control of the power-saving mode based SANYO: MFP36S backup function and all the segments forced off function Serial data control of switching between the segment output port and the general-purpose output port functions High generality, since display data is displayed directly without decoder intervention. Independent V for the LCD driver block (V can LCD LCD be set to any voltage in the range 2.7 to 6.0 volts, regardless of the logic block power-supply voltage.) The INH pin can force the display to the off state. RC oscillator circuit CCB is a trademark of SANYO ELECTRIC CO., LTD. CCB is a SANYOs original bus format and all the bus addresses are controlled by SANYO. Any and all SANYO products described or contained herein do not have specifications that can handle applications that require extremely high levels of reliability, such as life-support systems, aircrafts control systems, or other applications whose failure can be reasonably expected to result in serious physical and/or material damage. Consult with your SANYO representative nearest you before using any SANYO products described or contained herein in such applications. SANYO assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all SANYO products described or contained herein. SANYO Electric Co.,Ltd. Semiconductor Company TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN 92299TH (OT) No. 6235-1/14 0.1 2.15 7.9 2.5max 0.65 9.2 10.5LC75844M Specifications Absolute Maximum Ratings at Ta = 25C, V = 0 V SS Parameter Symbol Conditions Ratings Unit V max V 0.3 to +7.0 V DD DD Maximum supply voltage V max V 0.3 to +7.0 V LCD LCD V 1 CE, CL, DI, INH 0.3 to +7.0 V IN Input voltage V 2 OSC 0.3 to V + 0.3 V IN DD V3V 1, V 2 0.3 to V + 0.3 V IN LCD LCD LCD V 1 OSC 0.3 to V + 0.3 V OUT DD Output voltage V 2 S1 to S22, COM1 to COM4, P1 to P4 0.3 to V + 0.3 V OUT LCD I 1 S1 to S22 300 A OUT Output current I 2 COM1 to COM4 3 mA OUT I 3 P1 to P4 5 mA OUT Allowable power dissipation Pd max Ta = 85C 100 mW Operating temperature Topr 40 to +85 C Storage temperature Tstg 55 to +125 C Allowable Operating Ranges at Ta = 40 to +85C, V = 0 V SS Ratings Parameter Symbol Conditions Unit min typ max V V 2.7 6.0 V DD DD Supply voltage V V 2.7 6.0 V LCD LCD V 1V 1 2/3 V V V LCD LCD LCD LCD Input voltage V 2V 2 1/3 V V V LCD LCD LCD LCD Input high level voltage V CE, CL, DI, INH 0.8 V 6.0 V IH DD Input low level voltage V CE, CL, DI, INH 0 0.2 V V IL DD Recommended external resistance R OSC 43 k OSC Recommended external capacitance C OSC 680 pF OSC Guaranteed oscillation range f OSC 25 50 100 kHz OSC Data setup time t CL, DI: Figure 2 160 ns ds Data hold time t CL, DI: Figure 2 160 ns dh CE wait time t CE, CL: Figure 2 160 ns cp CE setup time t CE, CL: Figure 2 160 ns cs CE hold time t CE, CL: Figure 2 160 ns ch High level clock pulse width tH CL: Figure 2 160 ns Low level clock pulse width tL CL: Figure 2 160 ns Rise time t CE, CL, DI: Figure 2 160 ns r Fall time t CE, CL, DI: Figure 2 160 ns f INH switching time t INH, CE: Figure 3 10 s c Pin Assignment LC75844M Top view A12595 No. 6235-2/14 P1/S1 DI P2/S2 CL P3/S3 CE P4/S4 INH S5 OSC S6 V SS S7 V 2 LCD S8 V 1 LCD S9 V LCD S10 V DD S11 COM4 S12 COM3 S13 COM2 S14 COM1 S15 S22 S16 S21 S17 S20 S18 S19