ST7920 - Topwaydisplay.com

ST7920DC Characteristics ( T A = 25 o C, V DD = 4.5 V - 5.5 V )Symbol Characteristics Test Condition Min. Typ. Max. UnitV DD Operating Voltage - 4.5 - 5.5 VV LCD LCD Voltage V0-V SS 3.0 - 7 VI CC Power Supply Current f OSC = 540KHz, V DD =5VRf=33KΩ- 0.45 0.75 mAV IH1V IL1V IH2V IL2V OH1V OL1V OH2V OL2Input High Voltage(Except OSC1)- 0.7V DD - V DD VInput Low Voltage- -0.3 - 0.6 V(Except OSC1)Input High Voltage- V DD -1 - V DD V(OSC1)Input Low Voltage- - - 1.0 V(OSC1)Output High Voltage I OH = -0.1mA 0.8V DD - V DD V(DB0 - DB7)Output Low Voltage I OL = 0.1mA - - 0.4 V(DB0 - DB7)Output High Voltage I OH = -0.04mA 0.8V DD - V DD V(Except DB0 - DB7)Output Low Voltage I OL = 0.04mA - - 0.1V DD V(Except DB0 - DB7)I LEAK Input Leakage Current V IN = 0V to V DD -1 - 1 µAI PUP Pull Up MOS Current V DD = 5V 75 80 85 µAV3.1 33/42 2003/04/11