LC75814V 1/4-Duty General-Purpose LCD Driver Overview www.onsemi.com The LC75814V is a 1/4 duty general-purpose LCD driver that can be used for frequency display in electronic tuners under the control of a microcontroller. The LC75814V can drive an LCD with up to 64 segments directly. The LC75814V can also control up to 4 general-purpose output ports. Since the LC75814V 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 Support for 1/4 duty 1/2 bias or 1/4 duty 1/3 bias drive of up to 64 segments SSOP30 (275mil) under serial data control. Serial data input supports CCB* format communication with the system controller. Serial data control of the power-saving mode based 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 be set to any LCD LCD voltage in the range 2.7 to 6.0 volts, regardless of the logic block power- supply voltage.) The pin can force the display to the off state. INH RC oscillator circuit * Computer Control Bus (CCB) is an ON Semiconductors original bus format and the bus addresses are controlled by ON Semiconductor. ORDERING INFORMATION See detailed ordering and shipping information on page 15 of this data sheet. Semiconductor Components Industries, LLC, 2017 1 Publication Order Number : June 2017 - Rev. 1 LC75814V/D LC75814V 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 S16, COM1 to COM4, P1 to P4 0.3 to V + 0.3 V OUT LCD I 1 S1 to S16 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 Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality should not be assumed, damage may occur and reliability may be affected. 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 Functional operation above the stresses listed in the Recommended Operating Ranges is not implied. Extended exposure to stresses beyond the Recommended Operating Ranges limits may affect device reliability. Pin Assignment LC75814V Top view www.onsemi.com 2 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 S16