LC75847T 1/3, 1/4-Duty General-Purpose LCD Driver Overview The LC75847T is 1/3 duty and 1/4 duty general-purpose LCD driver that can be used for frequency display in electronic tuners under the control of a microcontroller. The LC75847T can drive an LCD with up to 420 segments www.onsemi.com directly. The LC75847T can also control up to 8 general-purpose output ports. Features Switching between 1/3 duty and 1/4 duty drive techniques under serial data control. Switching between 1/2 bias and 1/3 bias drive techniques under serial data control. Up to 318 segments for 1/3 duty drive and 420 segments for 1/4 duty drive can be displayed. Serial data input supports CCB* format communication with the system controller. Serial data control of the power-saving mode based backup function and all TQFP120 14x14 / TQFP120 the segments forced off function. Serial data control of switching between the segment output port and the general-purpose output port functions. Serial data control of frame frequency for common and segment output waveforms. High generality, since display data is displayed directly without decoder intervention. Built-in display contrast adjustment circuit Independent VLCD for the LCD driver block The pin can force the display to the off state. INH RC oscillator circuit Specifications Absolute Maximum Ratings at Ta = 25 C, V = 0 V SS Parameter Symbol Conditions Ratings unit V max V 0.3 to +7.0 DD DD Maximum supply voltage V V max V 0.3 to +7.0 LCD LCD V 1 0.3 to +7.0 IN INH CE, CL, DI, Input voltage V 2 0.3 to V +0.3 V OSC IN DD V3 V 1, V 2 0.3 to V +0.3 IN LCD LCD LCD V 1 0.3 to V +0.3 OSC OUT DD Output voltage V V 2 0.3 to V +0.3 VLCD0, S1 to S106, COM1 to COM4, P1 to P8 OUT LCD I 1 S1 to S106 300 A OUT I 2 mA Output current COM1 to COM4 3 OUT I 3 mA P1 to P8 5 OUT Allowable power dissipation Pd max Ta = 85C 200 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. * 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 28 of this data sheet. Semiconductor Components Industries, LLC, 2017 1 Publication Order Number : July 2017 - Rev. 1 LC75847T/D LC75847T 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 DD DD Supply voltage V , V 0 = 0.70 V to 0.95 V 4.0 6.0 V LCD LCD LCD LCD V LCD V , V 0 = V 2.7 6.0 LCD LCD LCD Output voltage V 0V02.7V V LCD LCD LCD V 1V 1 2/3 V 0V 0 LCD LCD LCD LCD Input voltage V V 2V 2 1/3 V 0V 0 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 39 k OSC Recommended external capacitance C OSC 1000 pF OSC Guaranteed oscillation range f OSC 19 38 76 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 t CL: Figure 2 160 ns H Low level clock pulse width t CL: Figure 2 160 ns L 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, Figure 4 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. www.onsemi.com 2