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| E2B0025-27-Y2 Semiconductor Semiconductor MSM6669 80-DOT LCD SEGMENT DRIVER This version: Nov. 1997 MSM6669 Previous version: Mar. 1996 GENERAL DESCRIPTION The MSM6669 is a dot matrix LCD segment driver which is fabricated using CMOS low power silicon gate technology. This LSI consists of 80-bit latches I and II, 80-bit level shifter, and 80-bit 4-level driver. It latches the 4-bit parallel display data from the LCD controller LSI or microcontroller, and then outputs the signal for the LCD driving. FEATURES * Logic supply voltage : 2.7V to 5.5V * LCD driving voltage : 14V to 28V * Applicable LCD duty : 1/64 to 1/256 * Bias voltage can be supplied externally * LCD output : 80 * 4-bit parallel data processing has improved the transfer speed to 1/4 that of the conventional serial transfer, thereby achieving low power consumption * Applicable common driver : MSM6778 (120 outputs) * Structure: TCP mounting with 35mm wide film (Product name: MSM6669AV-Z-05) Sn-plated Outer lead pitch : 220mm User area : 7.5mm 1/9 Semiconductor MSM6669 BLOCK DIAGRAM O1 O2 O79 O80 V1 V3 V4 VEE VDD 80-BIT 4-LEVEL DRIVER VEE DF DISP OFF 80-BIT LEVEL SHIFTER VDD LOAD 80-BIT LATCH (II) VSS D0 D1 D2 D3 VDD 80-BIT LATCH (I) VDD VSS CP EI SHL CONTROL CIRCUIT EO 2/9 Semiconductor MSM6669 PIN CONFIGURATION (TOP VIEW) Dummy Dummy Dummy O80 O79 O78 V1 V3 V4 VEE VSS SHL VDD EO DISP OFF O3 O2 O1 Dummy Dummy Dummy DF LOAD CP D3 D2 D1 D0 EI VDD 3/9 Semiconductor MSM6669 ABSOLUTE MAXIMUM RATINGS Parameter Supply Voltage (1) Supply Voltage (2) Input Voltage Storage Temperature Symbol VDD VLCD VI TSTG Condition Ta=25C Ta=25C, VDD - VEE* Ta=25C -- Rating -0.3 to +6.5 0 to 30 -0.3 to VDD + 0.3 -30 to +85 Unit V V V C * V1 > V3 > V4 > VEE, VDD V1 > V3 VDD -10V, VEE +10V V4 > VEE RECOMMENDED OPERATING CONDITIONS Parameter Supply Voltage (1) Supply Voltage (2) Operating Temperature Symbol VDD VLCD Top Condition -- VDD-VEE* -- Min. 2.7 14 -20 Typ. 5.0 -- -- Max. 5.5 28 75 Unit V V C * V1 > V3 > V4 > VEE, VDD V1 > V3 VDD -7V, VEE +7V V4 > VEE 4/9 Semiconductor MSM6669 ELECTRICAL CHARACTERISTICS DC Characteristics (VDD = 2.7 to 5.5V, Ta = -20 to +75C) Parameter "H" Input Voltage "L" Input Voltage "H" Input Current "L" Input Current "H" Output Voltage "L" Output Voltage On Resistance Symbol VIH VIL IIH IIL VOH VOL RON *1 *1 *1 *1 *2 *2 Condition -- -- VIH = VDD VIL = 0V IO = -0.2mA IO = 0.2mA VDD - VEE = 25V VDD = 2.7V VN - VO = 0.25V fCP = 6.0MHz, VDD = 3.0V VDD - VEE = 25V No load, fLOAD = 21.6kHz fCP = 6.0MHz, VDD = 3.0V VDD - VEE = 25V No load, fLOAD = 21.6kHz fCP = 6.0MHz, VDD = 3.0V VDD - VEE = 25V No load, fLOAD = 21.6kHz Min. 0.8 VDD Typ. -- -- -- -- -- -- 1.5 Max. VDD 0.2 VDD 1 -1 -- 0.4 3.0 Unit V V A A V V k -- VSS -- VDD - 0.4 -- -- *3 *4 Stand-by Current IDDSBY -- *5 -- 0.3 mA Supply Current (1) IDD1 IV CI -- *6 -- -- 5 1.5 (VDD) 1.0 (VEE) 100 -- mA Supply Current (2) Input Capacitance -- *7 A pF f = 1MHz -- Applicable to LOAD, CP, D0 to D3, EI , DF, DISP OFF pins. Applicable to EO pin. VN = V1 to VEE, V4 = 14/16 (VDD - VEE), V3 = 2/16 (VDD - VEE), VDD = V1. Applicable to O1 to O80 pins. Display data 1010, fDF = 45Hz, current that flows from VDD to Vss when the display data is not clocked in. *6 Display data 1010, fDF = 45Hz, current (VDD) that flows from VDD to VSS and VEE, and current (VEE) that flows from VDD to VEE when the display data is clocked in. *7 Display data 1010, fDF = 45Hz, current that flows to each of the V1, V3 and V4 pins. *1 *2 *3 *4 *5 5/9 Semiconductor Switching Characteristics MSM6669 (VDD = 2.7 to 5.5V, Ta = -20 to +75C, CL = 15pF) Parameter Clock Frequency Clock Pulse Width Rise/Fall Time Data Setup Time Data Hold Time Load Pulse Width Load Setup Time Load Clock Time "H", "L" Propagation Delay Time EI Setup Time Symbol fCP tW1 tr , tf tDSU tDHD tW2 tLSU tLC tPLH tPHL tESU tW1 tf Condition Duty = 50% -- -- -- -- -- -- -- -- -- tW1 tr tW1 0.8 VDD 0.2 VDD Min. -- 56 Typ. -- -- -- -- -- -- -- -- -- -- Max. 6.5 Unit MHz ns ns ns ns ns ns ns ns ns -- 20 -- -- -- -- -- 236 -- 50 50 70 80 80 -- 50 -- CP 0.8 VDD 0.8 VDD 0.2 VDD tDSU tDHD 0.8 VDD D0 - D3 0.8 VDD 0.2 VDD tLSU 0.8 VDD 0.8 VDD tW2 tf tLC 0.2 VDD LOAD 0.2 VDD tr 0.8 VDD CP 1 2 18 0.2 VDD 19 20 LOAD tPLH EO tPHL 0.2 VDD tESU EI 0.2 VDD 6/9 Semiconductor MSM6669 FUNCTIONAL DESCRIPTION Pin Functional Description * EI, EO These are enable signal input and output pins. When a cascade connection is required, set the first MSM6669's EI pin at "L" level and connect the EO pin to the next MSM6669's EI pin. When a single MSM6669 is used, EI should be set at "L" level. * CP This is a pin for clocking the display data in. Display data is stored into the latch (I) at the falling edge of a clock pulse. A clock pulse through this pin is enabled when the enable F/ F is set, and disabled when it is not set. * LOAD This is an input pin to latch the display data of one line stored in the latch (I). At the falling edge of a load pulse, the display data stored in the latch (I) is transferred to the latch (II). The control circuit to save the power is reset and the display data on the next line can be stored. * DF Synchronous signal input pin for alternate signal for LCD driving. * VDD, VSS These are power supply pins of this IC. The VDD pin is generally set to 2.7 to 5.5V. VSS is a grounding pin, which is generally set to 0V. * O1 to O80 These are output pins of the 4-level driver of this IC, which correspond directly to the bits of the 80-bit latch (II). One of the four levels V1, V3, V4, and VEE is selected and output by a combination of the latch contents (display data) and a DF signal. See the truth table. Connect the output pins to the liquid crystal panel on the segment side. * DISP OFF This is an input pin to control the output pins O1 to O80. During low signal input, signals on the V1 level are output from the output pins O1 to O80 irrespective of display data. See the truth table. 7/9 Semiconductor MSM6669 * D0, D1, D2, D3 These are display data input pins. Display data is input in synchronization with a clock pulse. Table 1 gives the relation between the display data, DF, liquid crystal drive output, and liquid crystal display. Table 1 Display data L H L H DF L L H H Liquid crystal drive output Non-select level Select level Non-select level Select level (V3) (V1) (V4) (VEE) Liquid crystal display OFF ON OFF ON * SHL This is an input pin used to change the loading direction of display data. Table 2 shows the correspondence between the bit positions of the 4-bit data (D0 to D3), its loading direction, and driver outputs (O1 to O80). Table 2 SHL D0 O1 O2 O3 O4 O80 O79 O78 O77 O5 O6 O7 O8 O76 O75 O74 O73 D1 D2 D3 D0 Direction of data loading O77 O78 O79 O80 O4 O3 O2 O1 L H D1 D2 D3 Last data First data 8/9 Semiconductor MSM6669 * V1, V3, V4, VEE Bias supply voltage pins to drive the LCD. Bias voltages for the LCD driving are supplied from an external source. Truth Table DF L L H H X X: Don't care Latch Data L H L H X DISP OFF H H H H L Driver Output Level (O1 - O80) V3 V1 V4 VEE V1 NOTES ON USE Note the following when turning power on and off: The LCD drivers of this IC require a high voltage. For this reason, if a high voltage is applied to the LCD drivers with the logic power supply floating, excess current flows. This may damage the IC. Be sure to carry out the following power-on and power-off sequences: When turning power on: First VDD ON, next VEE, V4, V3, V1 ON. Or both ON at the same time. When turning power off: First VEE, V4, V3, V1 OFF, next VDD OFF. Or both OFF at the same time. 9/9 |
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