LC75812PT 1/8, 1/9-Duty Dot Matrix LCD Controller / Driver with Key Input Function www.onsemi.com Overview The LC75812PT is 1/8, 1/9 duty dot matrix LCD display controllers/drivers that support the display of characters, numbers, and symbols. In addition to generating dot matrix LCD drive signals based on data transferred serially from a microcontroller, the LC75812PT also provide on-chip character display ROM and RAM to allow display systems to be implemented easily. These products also provide up to 3 general-purpose output ports and incorporate a key scan circuit that accepts input from up to 35 keys to reduce printed circuit board wiring. Features TQFP100 14x14 / TQFP100 Key input function for up to 35 keys (A key scan is performed only when a key is pressed.) Controls and drives a 57 or 58 dot matrix LCD. Supports accessory display segment drive (up to 65 segments) Display technique: 1/8 duty 1/4 bias drive (57 dots) 1/9 duty 1/4 bias drive (5 8 dots) Display digits: 13 digits 1 line (5 7 dots), 12 digits 1 line (5 8 dots) Display control memory CGROM: 240 characters (57 or 58 dots) CGRAM: 16 characters (57 or 58 dots) ADRAM: 13 5 bits DCRAM: 528 bits Instruction function Display on/off control Display shift function Sleep mode can be used to reduce current drain. Built-in display contrast adjustment circuit Switching between key scan output and general-purpose output ports can be controlled with instructions. PWM output for adjusting the LED backlight brightness The frame frequency of the common and segment output waveforms can be controlled by instructions. Serial data control of switching between the RC oscillator operating mode and external clock operating mode. Independent LCD driver block power supply V LCD A voltage detection type reset circuit is provided to initialize the IC and prevent incorrect display. The INH pin is provided. This pin turns off the display, disables key scanning, and forces the general-purpose output ports to the low level. 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 55 of this data sheet. Semiconductor Components Industries, LLC, 2017 1 Publication Order Number : June 2017 - Rev. 1 LC75812PT/D LC75812PT Specifications Absolute Maximum Ratings at Ta = 25 C, V = 0 V SS Parameter Symbol Conditions Ratings Unit V Maximum supply voltage V max 0.3 to +4.2 DD DD V V V max LCD 0.3 to +11.0 LCD Input voltage CE, CL, DI, INH 0.3 to +4.2 V 1 CE, CL, DI, INH IN 0.3 to +6.5 V =2.7 to 3.6V V DD OSC, KI1 to KI5, TEST V 2 0.3 to V +0.3 IN DD V 1, V 2, V 3, V 4 V 3 LCD LCD LCD LCD 0.3 to V +0.3 IN LCD Output voltage V 1 DO -0.3 to +6.5 OUT V 2 OSC, KS1 to KS7, P1 to P3 0.3 to V +0.3 V OUT DD V 0, S1 to S65, COM1 to COM9 V 3 LCD 0.3 to V +0.3 OUT LCD Output current S1 to S65 I 1 300 A OUT I 2 COM1 to COM9 3 OUT I 3 KS1 to KS7 1 mA OUT P1 to P3 I 4 5 OUT Allowable power Ta = 85C Pd max 200 mW dissipation 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 Range at Ta = 40C to +85C, V = 0 V SS Ratings Parameter Symbol Conditions unit min typ max Supply voltage V V 2.7 3.6 DD DD V V LCD LCD When the display contrast adjustment 7.0 10.0 circuit is used. V V LCD When the display contrast adjustment 4.5 10.0 circuit is not used. Output voltage V 0 V0 V 4 LCD LCD LCD V V LCD +4.5 Input voltage V 1 V 1 3/4 LCD LCD (V 0 V 0 LCD LCD V 4) LCD V 2 V 2 2/4 LCD LCD (V 0 V 0 LCD LCD V V 4) LCD V 3 V 3 1/4 LCD LCD (V 0 V 0 LCD LCD V 4) LCD V 4 V 4 0 1.5 LCD LCD Input high level voltage V 1 0.8V IH 3.6 CE, CL, DI, INH DD CE, CL, DI, INH 0.8V 5.5 DD V = 2.7 to 3.6 V V DD V 2 OSC external clock operating mode 0.8V V IH DD DD V 3 KI1 to KI5 0.6V V IH DD DD Input low level voltage V 1 0.2V IL 0 CE, CL, DI, INH, KI1 to KI5 DD V V 2 OSC external clock operating mode 0.2V 0 IL DD Continued on next page. www.onsemi.com 2