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 48 pin TQFP (Plastic) Absolute Maximum Ratings (Ta = 25°C) • Supply voltage VCC∗1 7.0 V VVG∗2 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 ≤ 25°C) Pd 1.72 W • Reduced ratio (Ta < 25°C) 13.8 mW/°C Structure Bi-CMOS IC Applications Small liquid crystal monitor Operating Conditions • Supply voltage VCC∗1 VVG∗2 VVC∗3 VVG∗4 ∗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 NC VL4 VH4 VL5 VH5 VL6 VH6 VL7 VH7 VL8 VH8 NC Block Diagram 36 35 34 33 32 31 30 29 28 27 26 25 24 NC NC 37 23 GND GND 38 V6 39 22 V7 V5 40 21 V8 V4 41 20 NC NC 42 19 Vcc Vcc 43 18 V2 V1 44 17 V3 V0 45 16 GND 15 COMVcc GND 46 buff VH1 VL1 7 8 9 10 11 12 NC 6 COMGND 5 COMSW 4 SW 3 VL0 2 VH0 1 VL2 13 NC VH2 NC 48 VL3 14 COMOUT VH3 NC 47 –2– CXD2475TQ Pin Description Pin No. Symbol 1 VH3 2 VL3 Pin voltage Equivalent circuit Description DC input when SW is high. Vcc DC input when SW is low. 1 DC input when SW is high. 3 VH2 3 4 VL2 5 DC input when SW is low. 5 VH1 7 DC input when SW is high. VH 26 DC input when SW is low. 6 VL1 7 VH0 30 DC input when SW is high. 8 VL0 32 DC input when SW is low. 28 34 26 VH8 27 VL8 28 VH7 4 DC input when SW is high. 29 VL7 6 DC input when SW is low. DC input when SW is high. 0.2 to 4.8V DC input when SW is low. 2 8 30 VH6 31 VL6 29 DC input when SW is low. 32 VH5 31 DC input when SW is high. 33 VL5 34 VH4 35 VL4 17 V3 18 V2 21 V8 22 V7 39 V6 DC input when SW is high. VL 27 33 DC input when SW is low. 35 DC input when SW is high. GND DC input when SW is low. Vcc V3 output. 17 V2 output. 18 V8 output. 21 V7 output. 22 0.2 to 4.8V 39 V6 output. 40 40 V5 41 V5 output. 41 V4 44 V4 output. 45 44 45 V1 output. V1 V0 GND V0 output. Vcc 9 Input switch. VL is output for low; VH for high. SW 9 10 10 COM output switch. COMVcc level is output for low; COMGND level for high. COMSW GND –3– CXD2475TQ Pin No. Symbol Pin voltage 11 COMGND 0 to 1.0V 14 COMOUT Equivalent circuit COMVcc Description COM output ground. 11 COM output. COMOUT 14 15 15 COMVcc 4.0 to Vcc COM power supply. 19 Vcc 5.0V 5V power supply. 43 Vcc 5.0V 5V power supply. 16 GND GND. 23 GND GND. 38 GND GND. 46 GND GND. 12 NC No connected. 13 NC No connected. 20 NC No connected. 24 NC No connected. 25 NC No connected. 36 NC No connected. 37 NC No connected. 42 NC No connected. 47 NC No connected. 48 NC No connected. COMGND 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. Item (Ta = 25°C, Vcc = COMVcc = 5V, COMGND = 0V) Symbol Condition Min. Typ. Max. Unit 1 Current consumption (Vcc + COMVcc) ICC Input voltage = 2.5V — 3.6 6.0 mA 2 VH, VL input current high IIH Input voltage = 4.8V –0.1 — 0.1 µA 3 VH, VL input current low IIL Input voltage = 0.2V –0.1 — 0.1 µA 4 SW, COMSW input current high IISH Input voltage = 5V –0.1 — 0.1 µA 5 SW, COMSW input current low IISL Input voltage = 0V –0.4 — 0.1 µA 6 VREF voltage gain AV Input voltage = 0.2 to 4.8V 0.985 — — V/V 7 VREF output voltage high VOH ISOURCE = 10mA Vcc – 0.2 — — V 8 VREF output voltage low VOL ISINK = 10mA — — 0.2 V 9 COMOUT output voltage high VCOH ISOURCE = 10mA COMVcc – 0.1 — — V 10 COMOUT output voltage low VCOL ISINK = 10mA — — COMGND + 0.1 V 11 VREF offset voltage VOFF — — 20 mV 12 VREF load regulation ∆VO — ±5 ±10 mV 13 SW, COMSW input voltage high VIH 2 — — V 14 SW, COMSW input voltage low — — 0.8 V 15 VREF transient time (1) Measurement circuit 1 — 5 8 µs 16 VREF transient time (2) Measurement circuit 2 — 3.5 6 µs 17 VREF propagation delay time (1) tpvLH1 Measurement circuit 1 — 3.5 6 µs 18 VREF propagation delay time (2) tpvLH2 Measurement circuit 2 — 2.5 5 µs 19 VREF propagation delay time difference (1) ∆tpv1 tpvLH1 – tpvHL1 — — ±1.6 µs 20 VREF propagation delay time difference (2) ∆tpv2 tpvLH2 – tpvHL2 — — ±0.8 µs 21 COM transient time Measurement circuit 3 — 3 5 µs 22 COM propagation delay time Measurement circuit 3 — 1.6 3 µs 23 COM propagation delay time difference tpcLH – tpcHL — — ±1 µs Input voltage = 0.2 to 4.8V ISOURCE = 10mA ISINK = 10mA VIL ttvLH1 ttvHL1 ttvLH2 ttvHL2 tpvHL1 tpvHL2 ttcLH ttcHL tpcLH tpcHL ∆tpc –5– CXD2475TQ Measurement Circuits Measurement circuit 1 VH 22Ω 4.8V Measurement point 27nF V0 0.2V VL Measurement circuit 2 VH 4.8V Measurement point V0 0.2V VL Measurement circuit 3 COMVcc 5.0V 22Ω Measurement point COMOUT 0V 27nF COMGND SW/COMSW 50% tpLH tpHL 90% Output waveform 50% 50% 10% ttLH ttHL –6– CXD2475TQ Application Circuit 47µ 0.01µ 36 35 34 33 32 31 30 29 28 Vcc Vcc Vcc Vcc Vcc Vcc Vcc Vcc Vcc Vcc 5V 27 26 25 37 24 38 23 To LCD 39 22 To LCD To LCD 40 21 To LCD To LCD 41 20 42 19 43 18 To LCD To LCD 44 17 To LCD To LCD 45 16 46 15 47µ 0.01µ 4.5V buff 47 14 48 13 1 2 3 4 5 6 7 8 9 10 11 To LCD (VCOM) 12 0.5V Vcc Vcc Vcc Vcc Vcc Vcc Vcc Vcc 47µ 0.01µ 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 36 1.1MAX (1.0) 25 24 B 0.8 ± 0.3 37 A 13 48 12 b 0.15 M 0.10 S (8.0 ± 0.15) S b=0.2 ± 0.08 0.5 ± 0.15 0.1 ± 0.1 0° to 10° S 0.15 ± 0.05 1 0.5 DETAIL B : SOLDER DETAIL A PACKAGE STRUCTURE PACKAGE MATERIAL EPOXY RESIN SONY CODE TQFP-48P-L111 LEAD TREATMENT SOLDER PLATING EIAJ CODE P-TQFP48-7x7-0.5 LEAD MATERIAL 42 ALLOY PACKAGE WEIGHT 0.14g JEDEC CODE –8–