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| CXD2475TQ Reference Voltage and Driver IC for LCD Description The CXD2475TQ is suitable IC for applying reference voltage for gamma correction which is necessary for TFT liquid crystal display. This IC has a built-in 9 channels of rail-to-rail buffer circuit which enables 2input switch and a common driver circuit. Features * Built-in 9 channels of rail-to-rail buffer circuit * Built-in common driver circuit * Current consumption: 3.6mA (typ.) * Package: 48pin TQFP Structure Bi-CMOS IC Applications Small liquid crystal monitor 48 pin TQFP (Plastic) Absolute Maximum Ratings (Ta = 25C) * Supply voltage VCC1 7.0 V VVG2 7.0 V 3 VVC VCC + 0.2 V 4 VVG GND - 0.2 V * Operating temperature Topr -25 to +85 C * Storage temperature Tstg -55 to +150 C * Allowable power dissipation (Ta 25C) Pd 1.72 W * Reduced ratio (Ta < 25C) 13.8 mW/C Operating Conditions * Supply voltage VCC1 VVG2 VVC3 VVG4 1 2 3 4 4.5 to 5.0 to 5.5 4.0 to VCC 4.0 to VCC 0 to 1.0 V V V V Applied to Vcc - GND. Applied to COMVcc - COMGND Applied to COMVcc - GND Applied to COMGND - GND Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits. -1- E99617-PS CXD2475TQ Block Diagram VH4 VH5 VH6 VH7 VH8 26 VL4 VL5 VL6 VL7 VL8 NC 36 NC 37 GND 38 V6 39 V5 40 V4 41 NC 42 Vcc 43 V1 44 V0 45 GND 46 35 34 33 32 31 30 29 28 27 25 24 NC 23 GND 22 V7 21 V8 20 NC 19 Vcc 18 V2 17 V3 16 GND 15 COMVcc buff 14 COMOUT 13 NC NC 47 NC 48 1 VH3 2 VL3 3 VH2 4 VL2 5 VH1 6 VL1 7 VH0 8 VL0 9 SW 10 COMSW 11 COMGND 12 NC -2- NC CXD2475TQ Pin Description Pin No. 1 2 3 4 5 6 7 8 26 27 28 29 30 31 32 33 34 35 17 18 21 22 39 40 41 44 45 Symbol VH3 VL3 1 Pin voltage Vcc Equivalent circuit Description DC input when SW is high. DC input when SW is low. VH2 VL2 VH1 VL1 VH0 VL0 VH8 VL8 VH7 VL7 VH6 VL6 VH5 VL5 VH4 VL4 V3 V2 V8 V7 V6 V5 V4 V1 V0 0.2 to 4.8V GND 3 5 7 VH 26 28 30 32 34 DC input when SW is high. DC input when SW is low. DC input when SW is high. DC input when SW is low. DC input when SW is high. DC input when SW is low. DC input when SW is high. DC input when SW is low. DC input when SW is high. DC input when SW is low. DC input when SW is high. DC input when SW is low. DC input when SW is high. DC input when SW is low. DC input when SW is high. DC input when SW is low. V3 output. V2 output. V8 output. V7 output. V6 output. V5 output. V4 output. V1 output. 0.2 to 4.8V 2 4 6 8 VL 27 29 31 33 35 Vcc 17 18 21 22 39 40 41 44 45 GND Vcc V0 output. 9 SW 9 10 Input switch. VL is output for low; VH for high. 10 COMSW GND COM output switch. COMVcc level is output for low; COMGND level for high. -3- CXD2475TQ Pin No. Symbol Pin voltage Equivalent circuit Description 11 COMGND 0 to 1.0V COMVcc COM output ground. 11 14 COMOUT COMOUT 14 15 COM output. 15 COMVcc 4.0 to Vcc COMGND COM power supply. 19 43 16 23 38 46 12 13 20 24 25 36 37 42 47 48 Vcc Vcc GND GND GND GND NC NC NC NC NC NC NC NC NC NC 5.0V 5.0V 5V power supply. 5V power supply. GND. GND. GND. GND. No connected. No connected. No connected. No connected. No connected. No connected. No connected. No connected. No connected. No connected. Note) * GND Make sure that Pins 16, 23, 38 and 46 are connected to GND potential, and do not release them. * Decoupling capacitor Locate decoupling capacitor connected between power supply and GND as near IC pin as possible. * Design VH and VL input pins not to have capacity. -4- CXD2475TQ Electrical Characteristics No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Item Current consumption (Vcc + COMVcc) VH, VL input current high VH, VL input current low Symbol ICC IIH IIL (Ta = 25C, Vcc = COMVcc = 5V, COMGND = 0V) Condition Input voltage = 2.5V Input voltage = 4.8V Input voltage = 0.2V Input voltage = 5V Input voltage = 0V Input voltage = 0.2 to 4.8V ISOURCE = 10mA ISINK = 10mA ISOURCE = 10mA ISINK = 10mA Min. -- -0.1 -0.1 -0.1 -0.4 0.985 Vcc - 0.2 -- COMVcc - 0.1 -- -- Input voltage = 0.2 to 4.8V ISOURCE = 10mA ISINK = 10mA -- 2 -- Measurement circuit 1 -- Typ. 3.6 -- -- -- -- -- -- -- -- -- -- 5 -- -- 5 Max. 6.0 0.1 0.1 0.1 0.1 -- -- 0.2 -- COMGND + 0.1 20 10 -- 0.8 8 Unit mA A A A A V/V V V V V mV mV V V s SW, COMSW input current high IISH SW, COMSW input current low VREF voltage gain VREF output voltage high VREF output voltage low COMOUT output voltage high COMOUT output voltage low VREF offset voltage VREF load regulation IISL AV VOH VOL VCOH VCOL VOFF VO SW, COMSW input voltage high VIH SW, COMSW input voltage low VREF transient time (1) VIL ttvLH1 ttvHL1 ttvLH2 ttvHL2 tpvLH1 tpvHL1 tpvLH2 tpvHL2 tpv1 tpv2 ttcLH ttcHL tpcLH tpcHL tpc 16 VREF transient time (2) VREF propagation delay time (1) VREF propagation delay time (2) VREF propagation delay time difference (1) VREF propagation delay time difference (2) COM transient time Measurement circuit 2 -- 3.5 6 s 17 Measurement circuit 1 -- 3.5 6 s 18 19 20 21 Measurement circuit 2 tpvLH1 - tpvHL1 tpvLH2 - tpvHL2 Measurement circuit 3 -- -- -- -- 2.5 -- -- 3 5 1.6 0.8 5 s s s s 22 23 COM propagation delay time COM propagation delay time difference Measurement circuit 3 tpcLH - tpcHL -- -- 1.6 -- 3 1 s s -5- CXD2475TQ Measurement Circuits Measurement circuit 1 VH 4.8V V0 VL 22 Measurement point 0.2V 27nF Measurement circuit 2 VH 4.8V Measurement point 0.2V VL V0 Measurement circuit 3 COMVcc 5.0V 22 Measurement point 0V COMGND COMOUT 27nF SW/COMSW 50% tpLH 90% Output waveform 50% tpHL 50% 10% ttLH ttHL -6- CXD2475TQ Application Circuit 47 0.01 5V Vcc Vcc Vcc Vcc Vcc Vcc Vcc Vcc Vcc 28 27 Vcc 26 36 37 38 To LCD To LCD To LCD 39 40 41 42 43 To LCD To LCD 44 45 46 35 34 33 32 31 30 29 25 24 23 22 21 20 19 18 17 16 47 0.01 15 buff 14 13 To LCD (VCOM) 4.5V To LCD To LCD To LCD To LCD 47 48 1 2 3 4 5 6 7 8 9 10 11 12 47 0.01 Vcc Vcc Vcc Vcc Vcc Vcc Vcc Vcc 0.5V Polarity inverted pulse Application circuits shown are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits or for any infringement of third party patent and other right due to same. -7- CXD2475TQ Package Outline Unit: mm 48PIN TQFP (PLASTIC) 9.0 0.3 7.0 0.2 1.1MAX (1.0) 25 24 B 36 37 A 48 1 0.5 b 12 0.15 M S S 13 0.8 0.3 0.10 S 0.1 0.1 (8.0 0.15) b=0.2 0.08 0 to 10 DETAIL B : SOLDER DETAIL A PACKAGE STRUCTURE PACKAGE MATERIAL SONY CODE EIAJ CODE JEDEC CODE TQFP-48P-L111 P-TQFP48-7x7-0.5 LEAD TREATMENT LEAD MATERIAL PACKAGE WEIGHT EPOXY RESIN SOLDER PLATING 42 ALLOY 0.14g -8- 0.15 0.05 0.5 0.15 |
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