MITSUMI TFT Liquid Crystal Interface MM1288CQ TFT Liquid Crystal Interface Monolithic IC MM1288CQ Outline This IC was developed as an interface IC for video equipment having a small monitor. This IC performs γ correction and polarity identification to convert RGB signals into TFT liquid crystal RGB signals. A common inversion circuit and sync separation circuit are built-in. Features 1. 2. 3. 4. 5. 6. 7. Power supply voltage +13V, 0V or +5V, -8V Built-in polarity ID circuit Built-in γ correction circuit Common inversion circuit built-in 2 input switch built-in Built-in contrast adjustment circuit Built-in sync separation circuit Package QFP-48A Applications 1. 2. 3. 4. 5. Navigation systems Pachinko games (models with color TFT) Videophones, conferencing systems Game equipment Others TFT Liquid Crystal Interface MM1288CQ MITSUMI Block Diagram Pin Description Pin no. Pin name 1, 6 11, 12 13, 23 24, 25 36, 37 38, 48 2, 3 4, 7 8, 9 Function Internal equivalent Pin no. Pin name circuit diagram Function 14 SYNC OUT Sync output 15 TIME CONSTANT Sync integration 16 SYNC IN Sync input 17, 18 44 CLAMP (RGB) Clamp NC RGB IN RGB input 5 GND GND pin 10 SYNC SEP IN Sync separation input Internal equivalent circuit diagram TFT Liquid Crystal Interface MM1288CQ MITSUMI Pin no. Pin name Function SUB 19, 45 CONTRAST Subcontrast CONTRAST Contrast 20 VCC1 Positive polarity power supply pin 1 21, 42 SUB BRIGHT Sub bright 43 22 Common COMMON operating DC VOLT point adjustment 26 COMMON INV Common inversion 27 COMMON OUT Common output 28 COMMON SWING 29, 31 RGB OUT 33 30 VEE Common amplitude adjustment Internal equivalent Pin no. Pin name circuit diagram Function 32 OUT DC V DETECT G output detection 34 GAMMA1 Gamma correction 1 35 CENTER DC Adjust center voltage 39 GAMMA2 Gamma correction 2 40 INV Inversion 41 VCC2 Positive polarity power supply pin 2 46 BRIGHT Bright 47 SW Switch RGB output Negative polarity pin Internal equivalent circuit diagram TFT Liquid Crystal Interface MM1288CQ MITSUMI Note : GAMMA1, GAMMA2 (Pins 34, 39) DC voltage applied to these pins sets γ correction DC voltage gain change point. γ correction Output is given characteristics as shown at left according to LCD panel characteristics. Pins 34 and 39 adjust the slope change position. Output γ1 γ2 Input INV (40PIN) The primary color output (pins 29, 31, 33) and COMMON output (pin 27) are inverted according to the inversion pulse input to this pin. When COMMON INV (pin 26) has Vcc2 potential, the relationships between the input, output and inversion pulse are as shown in the figure below. RGB input Inversion pulse Primary color output COMMON output Absolute Maximum Ratings (Ta=25°C) Item Symbol Ratings Units Storage temperature TSTG -40~+125 °C Operating temperature TOPR -20~+85 °C VCC1-GND 6 V VCC2-VEE 15 V GND-VEE 10 V Allowable loss 1 Pd 1 500 mW Allowable loss 2 Pd 2 1000* mW Power supply voltage *47mm 75mm 0.8mm printed circuit board (glass epoxy) board mounted. TFT Liquid Crystal Interface MM1288CQ MITSUMI Electrical Characteristics (Except where noted otherwise, Ta=25°C, All SW : A, VCC1=5.0V, VCC2=13V, GND=0V, VEE=0V, T16; SG1, T40; SG2, V46=3.5V) Item VCC1 pin operating power supply voltage range Operating power supply voltage range when on power supply +2 Operating power supply voltage range when on power supply ± Consumption current 1 Consumption current 2 Symbol Voltage gain GV Voltage gain difference between inputs GVSW Reversed/non-reversed voltage gain difference GVINV RGB voltage gain differences GVRGB Maximum voltage gain GV max. Minimum voltage gain GV min. Subcontrast change Input dynamic range Switch crosstalk Measurement conditions Min. Typ. Max. Units VCC1 4.5 VCC2+2 VEE+2 VCC2± VEE± ICC1 ICC2 10.0 GVSUB VINDR CTSW VCC1=5V VCC2=13V Measure ratio of SG3 and T29, 31, 33 sine waves. Measure T29, 31, 33 sine wave ratio when SW47 : SW2~4, 7~9 ; B and V47=0V and 5V. B Measure T29, 31, 33 sine T2~4, 7~9 ; wave ratio when T40=0V SG3 and 5V. Adjust V46 Measure T29, 31, 33 sine so that T29, wave ratio. 31 and 33 SW43 ; B, V43=4.5V amplitude is Measure SG3 and T29, 8V. 31, 33 sine wave ratio. SW43 ; B, V43=4.5V Measure SG3 and T29, 31, 33 sine wave ratio. SW2~4, 19, 45 ; B, T2~4 ; SG3 Adjust V46 so that T29, 31 and 33 amplitude is 8V. Measure ratio between T29, 31 and T33 sine waves when V19 and 45 are 0.5~4.5V. SW2~4, 43 ; B, T2~4 ; SG3, V43=1.5V Adjust V46 so that T29, 31 and 33 amplitude is 9V. Vary SG3 amplitude and measure SG3 amplitude at the point where T29, 31 and 33 signals start to be saturated. SW2~4, 43, 47 ; B, T2~4 ; SG4, V47=5V Adjust V46 so that T29, 31 and 33 amplitude is 8V, and adjust V43 so that T29, 31 and 33 sine wave amplitude is 5VP-P. Vary SW47 in this state and measure 1MHz spectrum change. SW7~9, 43, 47 ; B, T7~9 ; SG4, V47=5V Adjust V46 so that T29, 31 and 33 amplitude is 8V, and adjust V43 so that T29, 31 and 33 sine wave amplitude is 5VP-P. Vary SW47 in this state and measure 1MHz spectrum change. 5.0 13.0 GND 4.5 5.0 -8.5 -8.0 8.5 17.0 5.5 V 14.0 V V V V mA mA 5.5 -6.5 15.0 22.0 17 dB 0.7 dB 0.7 dB 0.7 dB 18 dB 13 1.5 dB ±1 dB 1.9 VP-P -50 -44 dB -50 -44 dB TFT Liquid Crystal Interface MM1288CQ MITSUMI Item Symbol Crosstalk between RGB CTRGB Output dynamic range (B-B) VDR B-B Output dynamic range (B-W) VDR B-W Output center voltage VC Output center voltage change VC Bright change Amplitude difference between bright RGB signals Sub-bright change VBRIT VBRIT RGB VSUBB Frequency characteristic fmax. COMMON output amplitude COMMON output maximum amplitude COMMON output minimum amplitude COMMON output center maximum voltage COMMON output center minimum voltage VCOM VCOM max. VCOM min. VCO max. VCO min. Sync separation input sensitivity current IIS Sync separation output low voltage VSYNL Sync input threshold voltage VTH15 Sync input input current I15 Subcontrast input current I18, I41 Measurement conditions Min. Typ. SW2 ; B T2 ; SG4 Adjust V46 so that T33 amplitude is 8V, and adjust V43 so that T33 sine wave amplitude is 5VP-P. Then measure the -48 difference between T33 and T29, 31 signals 1MHz spectrum. Measure in the same way for G B,R and B R, G. SW2~4 ; B, T2~4 ; SG4, V46=0.5V 10 11 Measure T29, 31 and 33 signals. SW2~4, 43 ; B, T2~4 ; SG4, V43=4.5V Adjust V46 so that T29, 31 and 33 6.0 7.0 amplitude is 9V and measure T29, 31 and 33 sine wave amplitude. Adjust V46 so that T29, 31 and 33 amplitude is 6.3 6.5 0V and measure T29, 31 and 33 DC voltage. Adjust V46 so that T29, 31 and 33 amplitude is 0V and measure the difference T29, 31 and 3.0 33 DC voltage when V35=5V and 8v Measure the difference between T29, 31 and 33 10.0 13.5 signal clamp levels when V46=0.5V and 4.5V. Adjust V46 so that T31 amplitude is 5.7V -0.5 and measure T29 and 33 amplitude ratio. After adjusting V46 so that T29, 31 and 33 amplitude is 6V, with SW21 and 42 : B, vary V21 and 42 between 8~10V and measure ±1 the maximum value of the difference between T31 and T29, 33 amplitudes. SW2~4, 29, 31, 33 ; B, T2~4 ; SG4 Adjust V46 so that T29, 31 and 33 amplitude is 8V, then adjust V43 so that 4.0 5.0 T29, 31 and 33 sine wave amplitude is 5VP-P. Vary sine wave frequency at measure cutoff frequency. Measure T27 amplitude. 6.0 6.5 SW28 ; B, V28=12V Measure T27 amplitude. 8.0 SW28 ; B, V28=0V T27 amplitude. -0.1 0 SW22, 28 ; B, V22=5V, V28=0V 8.5 Measure T27 amplitude. SW22, 28 ; B, V22=0.5V, V28=0V Measure T27 DC voltage Increase current flowing out on T10, and measure outflow current when T14 -50 -35 voltage changes from high to low. Measure T14 voltage when 5V is applied to T10. 0.2 Measure T14 inverted input voltage when 1.4 1.9 T16 voltage is changed from 0 5V. SW16 ; B Apply 0V to T16 and measure I16. -1.5 SW19, 45, 46 ; B Measure I19 and 45 when V19 and 45 are -60 0.5V and 4.5V. Max. Units -40 dB VP-P VP-P 6.7 V V V 0.5 dB V MHz 0.1 VP-P VP-P VP-P V 4.5 V -20 µA 0.4 V 2.4 V µA 70 µA TFT Liquid Crystal Interface MM1288CQ MITSUMI Item Symbol Sub-bright input current I20, I38 COMMON DC VOLT input current I21 COMMON INV threshold voltage VTH24 COMMON INV input current I24 COMMON SWING input current I26 GAMMA1 input voltage I32 GAMMA2 input voltage I35 INV threshold voltage VTH36 INV input current I36 Contrast input current I39 Bright input current CENTER DC input current I42 I35 SW threshold voltage VTH47 SW input current I43 GAMMA1 fluctuation V34 GAMMA2 fluctuation V39 H-to-L common transport delay time L-to-H common transport delay time COMMON fall time COMMON rise time Difference in COMMON rise and fall times H-to-L primary color signal transport delay time L-to-H primary color signal transport delay time Primary color signal fall time Primary color signal rise time Difference in primary color signal rise and fall times tPHL tPLH tTHL tTLH tT Measurement conditions Min. Typ. SW21, 42, 46 ; B -50 Measure I21 and 42 when V21 and 42 are 7.5V and 10.5V. SW22 ; B -100 Measure I22 when V22=0V. SW26 ; B 6.0 6.5 Vary V26 between 0~13V and measure V26 when T27 phase inverts. SW26 ; B -90 Measure I26 when V26=0 and 13V. SW28 ; B -60 Measure I26 when V26=9 and 12V. SW34 ; B Measure I34 when V34=11V. SW39 ; B -6 Measure I39 when V39=1V. Vary T40 voltage from 0 5V and measure 2.5 3.0 the voltage when T27 phase inverts. -2 Measure I40 when V40 is 0V. SW43 ; B -60 Measure I43 when V43 is 0.5V and 4.5V. Measure I46 when V46=1.7V. 105 110 Measure I35 when V35=VCC2 SW2~4, 47 ; B, T2~4 ; SG3 Adjust V46 so that T29, 31 and 33 0.8 1.4 amplitude is 8V. Vary V47 voltage from 0 5V and measure V47 when T29, 31 and 33 sine waves disappear. SW47 ; B Measure I47 when V47=0V. SW2~4, 34, 43 ; B, T2~4 ; SG5 Adjust V43 so that T29, 31 and 33 amplitude is 0.8 1.2 3V. Vary V34 voltage from 3 6V and measure the amount of T29, 31 and 33 voltage change. SW2, 3, 4, 39, 43 ; B, T2~4 ; SG5 Adjust V43 so that T29, 31 and 33 amplitude is 0.8 1.2 3V. Vary V39 voltage from 6.2 8V and measure the amount of T29, 31 and 33 voltage change. SW27, 28 ; B, T40 ; SG6 Adjust V28 so that T27 amplitude is 6V. tT= 2 2 tTHL-tTLH tPHL tPLH tTHL tTLH tT SW29, 31, 33 ; B, T40 ; SG6 Adjust V46 so that T29, 31 and 33 amplitude is 8V. tT= tTHL-tTLH 1 1 Max. Units 40 µA µA 7.0 V 90 µA 60 µA 6 µA µA 3.5 V µA 70 µA 3 165 µA µA 2.0 V 4.5 µA 2.1 V 2.1 V 2 2 3 3 µS µS µS µS 2 µS 2 µS 2 µS 2 2 µS µS 1 µS TFT Liquid Crystal Interface MM1288CQ MITSUMI Example of Power Supply Use Impressed power supply Left : +2 power supply VCC2 Right : ± power supply 13V 13V VCC1 5V VCC2 5V GND VCC1 5V VEE 0V 13V VEE -8V Input Signal Waveforms 63.5US (1H) SG1 4.7US 3V 0V SG2 1.5US 3V 0V 10.9US SG3 0.5VP-P 100kHz SG4 1VP-P 1MHz 0.5VP-P SG5 90% 90% 5V SG6 10% tr<50nS 10% tf<50nS -0V GND MITSUMI Measuring Circuit TFT Liquid Crystal Interface MM1288CQ MITSUMI Application Circuits Basic Connection Diagram 1 (VCC1=5V, VCC2=13V) TFT Liquid Crystal Interface MM1288CQ MITSUMI Basic Connection Diagram 2 (VCC=5V, VEE=-8V) TFT Liquid Crystal Interface MM1288CQ