LC75897W 1/3, 1/4-Duty General-Purpose LCD Driver Overview The LC75897PW is 1/3 duty and 1/4 duty general-purpose LCD display www.onsemi.com driver that can be used for frequency display in electronic tuners under the control of a microcontroller. The LC75897PW can drive an LCD with up to 512 segments directly. The LC75897PW can also control up to 8 general-purpose output ports. The LC75897PW has a built-in of up to three PWM output port channels, which enables to adjust the brightness of the RGB LED backlight. 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 SPQFP144 20x20 / SQFP144 data control. Up to 387 segments for 1/3 duty drive and 512 segments for 1/4 duty drive can be displayed. Switching between the segment, general-purpose, PWM, and clock output ports can be controlled using serial data (up to 8 general-purpose output ports, up to 3-channel PWM output ports, and one clock output port). 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 the frame frequency for common and segment output waveforms. Serial data control of switching between the RC oscillator operating mode and external clock operating mode. High generality, since display data is displayed directly without decoder intervention. Built-in display contrast adjustment circuit Independent V for the LCD driver block LCD The INH pin can force the display to the off state. 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 33 of this data sheet. Semiconductor Components Industries, LLC, 2017 1 Publication Order Number : July 2017 - Rev. 1 LC75897PW/D LC75897PW Specifications Absolute Maximum Ratings at Ta = 25 C, V = 0 V SS Parameter Symbol Conditions Ratings Unit Maximum supply voltage V max V 0.3 to +7.0 DD DD V V max V 0.3 to +7.0 LCD LCD Input voltage V 1 CE, CL, DI, INH 0.3 to +7.0 IN V2 OSC 0.3 to V +0.3 V IN DD V3 V 1, V 2 0.3 to V +0.3 IN LCD LCD LCD Output voltage V 1 OSC 0.3 to V +0.3 OUT DD V V 2 V 0, S1 to S129, COM1 to COM4, P1 to P8 0.3 to V +0.3 OUT LCD LCD Output current I 1 S1 to S129 300 A OUT I 2 COM1 to COM4 3 OUT mA I 3 P1 to P8 5 OUT Allowable power dissipation Pd max Ta = 85 C 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. Allowable Operating Ranges at Ta = 40 to +85C, V = 0 V SS Ratings Parameter Symbol Conditions unit min typ max Supply voltage V V 2.7 6.0 DD DD V V , LCD LCD 4.0 6.0 V V 0 = 0.70V to 0.95V LCD LCD LCD V , V 0 = V 2.7 6.0 LCD LCD LCD Output voltage V 0 V 0 V 2.7 V LCD LCD LCD Input voltage V 1 V 1 2/3V 0 V 0 LCD LCD LCD LCD V V 2 V 2 1/3V 0 V 0 LCD LCD LCD LCD Input high-level voltage V 1 CE, CL, DI, INH 0.8V 6.0 IH DD V V 2 OSC external clock operating mode 0.7V V IH DD DD Input low-level voltage V 1 CE, CL, DI, INH 0 0.2V IL DD V V 2 OSC external clock operating mode 0 0.3V IL DD Recommended external R OSC RC oscillator operating mode OSC 10 k resistor for RC oscillation Recommended external C OSC RC oscillator operating mode OSC 470 pF capacitor for RC oscillation Guaranteed range of RC f OSC RC oscillator operating mode OSC 150 300 600 kHz oscillation External clock operating f OSC external clock operating mode CK 150 300 600 kHz frequency Figure 4 External clock duty cycle D OSC external clock operating mode CK 30 50 70 % Figure 4 Data setup time tds CL,DI Figure 2 , Figure 3 ns 160 Data hold time tdh CL,DI Figure 2 , Figure 3 160 ns CE wait time tcp CE,CL Figure 2 , Figure 3 ns 160 CE setup time tcs CE,CL Figure 2 , Figure 3 ns 160 CE hold time tch CE,CL Figure 2 , Figure 3 ns 160 High-level clock pulse width t H CL Figure 2 , Figure 3 ns 160 Low-level clock pulse width t L CL Figure 2 , Figure 3 ns 160 Rise time tr CE, CL, DI Figure 2 , Figure 3 ns 160 Fall time tf CE, CL, DI Figure 2 , Figure 3 ns 160 INH INH switching time tc , CE Figure 5 , Figure 6 10 s 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