STV6688 ® Video Switch Matrix for TV Applications with S Terminal PRODUCT PREVIEW Key Features ■ I²C Bus Control ■ Standby Mode ■ 4 Y/CVBS Inputs (one for internal TV signal) ■ 4 C Inputs (one for internal TV signal) ■ 1 Y/C Adder PDIP20 ■ 1 Y/CVBS and 1 C Output, each with 0 dB gain Order Code: STV6688 ■ 1 CVBS Output with 6 dB gain and 150 Ω Buffer for Monitor ■ SYNC Bottom Clamp on all CVBS/Y and Average Bias on C Inputs ■ Bandwidth: 15 MHz ■ Crosstalk: 50 dB (min.) PSO20 Order Code: STV6688A General Description The STV6688 is a highly-integrated I²C buscontrolled video switch matrix, optimized for use in color TV applications. It is used to control the switching of 4 video signals. These signals can be in Single Component form (CVBS) or in Two Component form (Y/C). In both cases, the STV6688 microcontroller provides a CVBS signal for an external device (monitor). Pin Connections Y/CVBS_IN1 1 20 DEC C_IN1 2 19 Y/CVBS_IN_TV VCC_V 3 18 C_IN_TV Y/CVBS_IN2 4 17 VCC_B C_IN2 5 16 CVBS_OUT GND_V 6 15 GND_B Y/CVBS_IN3 7 14 Y/CVBS_OUT C_IN3 8 13 C_OUT VDD 9 12 GND SDA 10 11 SCL September 2003 This is preliminary information on a new product now in development. Details are subject to change without notice. 1/12 Functional Description 1 STV6688 Functional Description Table 1: Pin List Pin Symbol Description Pin Symbol Description 1 Y/CVBS_IN1 Y or CVBS Signal of Ext. Input 1 11 SCL Serial Clock Line Input 2 C_IN1 C Signal of Ext. Input 1 12 GND Digital Parts Ground 3 VCC_V Video Switch Power Supply 13 C_OUT C Signal Output 4 Y/CVBS_IN2 Y or CVBS Signal of Ext. Input 2 14 Y/CVBS_OUT Y/CVBS Output 5 C_IN2 C Signal of Ext. Input 2 15 GND_B Buffer Ground 6 GND_V Video Switch Ground 16 CVBS_OUT Y and C Adder Output 7 Y/CVBS_IN3 Y or CVBS Signal of Ext. Input 3 17 VCC B Buffer Power Supply 8 C_IN3 C Signal of Ext. Input 3 18 C_IN_TV C Signal of TV Input 9 VDD Digital Parts Power Supply 19 Y/CVBS_IN_TV Y or CVBS Signal of TV Input 10 SDA Serial Data Line Input 20 DEC Decoupling Figure 1: STV6688 Block Diagram Y/CVBS_IN TV 19 Y/CVBS_IN1 1 Y/CVBS_IN2 4 Y/CVBS_IN3 7 14 Y/CVBS_OUT 0dB + 6dB Buffer 16 CVBS_OUT Clamp C_IN TV 18 C_IN1 2 Clamp C_IN2 5 Clamp C_IN3 8 Clamp 0dB 13 C_OUT Mute VREF 17 VCC B 3 VDD 9 I²C Bus Decoder 20 12 GND 2/12 10 11 SDA SCL 15 6 GND B GND V VCC V DEC Buffer Power Supply Video Power Supply STV6688 2 Electrical Characteristics Electrical Characteristics TAMB = 25°C, VCCV = VCCB = VDD = 5V, RLoadYC = 4.7 kΩ, RLoadCVBS = 150 Ω, unless otherwise specified. Parameter Symbol Test Conditions Min. Typ. Max. Unit VDD Digital Supply Voltage 4.5 5 5.5 V VCC Video Operating Supply Voltage 4.5 5 5.5 V VCCB Buffer Supply Voltage 4.5 5 5.5 V Active (Channels ON) IDD Digital Supply Current VDD = 5 V 3 mA ICCV Total Video Supply Current (VCC,VCCBi) VCC = 5 V, No load VCCV = VCCB = 5V, with loads and signals 13 25 mA Digital Supply Current VDD = 5 V 3 mA Total Video Supply Current VCC = 5 V 0.3 mA Standby (All Channels OFF) IDD ICCVstd 2.1 Thermal Data Symbol RthJA 2.2 Parameter Package Maximum Junction-to-Ambient Thermal Resistance Value Unit DIP20 (STV6688) 80 °C/W SO20 (STV6688A) 100 °C/W Y/CVBS Section TAMB = 25°C, VCCV = VCCB = VDD = 5V, RLoadYC = 4.7 kΩ, RLoadCVBS = 150 Ω, unless otherwise specified. Symbol Parameter Test Conditions VDCIN DC Input Level Bottom Sync pulse ICLAMP Clamping Current at VDCIN-400 mV Input Leakage Current VIN = VDCIN + 1 V ILEAK Min. 1 Typ. Max. Unit 2 V 2 mA 1 10 µA CIN Input Capacitance VIN Max Input Signal VCC = 5 V 1.5 VPP Dynamic Y/CVBS Output Signal VCC = 5 V 1.5 VPP Dynamic CVBS Output Signal VCC = 5 V 3 VPP DYNY DYNCVBS BW 2 pF Bandwidth at -3 dB Y/CVBS VIN = 1 VPP Y/C Mixer (on CVBS_OUT) VIN = 1 VPP 12 8 15 10 MHz 3/12 Electrical Characteristics Symbol Flatness Parameter STV6688 Test Conditions Min. Spread of Gain in Video Band (15 kHz-5 MHz) Y/CVBS VIN = 1 VPP Y/C Mixer (on CVBS_OUT) VIN = 1 VPP Typ. Max. Unit ±0.2 ±0.5 ±0.5 ±1.0 dB CTi Crosstalk Isolation between Y/CVBS Input Channels VIN = 1 VPP at f = 4.43 MHz, on one point. 55 60 dB CTo Crosstalk Isolation of Y/CVBS from C Channels VIN = 1 VPP at f = 4.43 MHz, on one point. 50 55 dB Gain at Y/CVBS out @1 MHz VIN = 1 VPP -0.5 0 +0.5 dB GCVBS Gain at CVBS out @1 MHz VIN = 1 VPP 5.5 6 6.5 dB ROUTY Y/CVBS Output Resistance 2.5 5.0 Ω 1 5 Ω 0 +0.5 dB GYCVBS ROUTCVBS CVBS Output Resistance GYCVBSM Gain matching between Y, CVBS inputs VIN = 1 VPP DC CVBS Output voltage Bottom sync pulse 0.8 V DC Y Output voltage Bottom sync pulse for Y 1.3 V Differential Phase VIN = 1 VPP at f = 4.43 MHz 1 3 deg DG Differential Gain VIN = 1 VPP at f = 4.43 MHz 1 5 % LNL Luminance non-linearity 0.6 3 % VSN Video S/N ratio DCOUTCVBS DCOUTY DPHI Refer to Note 1 -0.5 65 dB Note: 1 S/N = 20log (VOUT Black to White = 0.7 VPP/VNoise (mVRMS) weighted CCIR567). 2.3 Chroma Section TAMB = 25°C, VCCV = VCCB = VDD = 5V, RLoadYC = 4.7 kΩ, RLoadCVBS = 150 Ω, unless otherwise specified. Symbol VDCIN Parameter Test Conditions Min. DC Input Level Typ. Max. Unit 3 V 50 kΩ 2 pF RIN Input Resistance CIN Input Capacitance VIN Max Input Signal 1.5 VPP DYN Dynamic Output Signal 1.5 VPP CBW Chroma Bandwidth CIN= 1 VPP 10 12 MHz CTi Crosstalk Isolation between C Input Channels CIN = 0. 5VPP at f = 4.43 MHz, on one point. 55 60 dB CTo Crosstalk Isolation of C from Y Channels VIN = 1 VPP at f = 4.43 MHz, on one point. 50 55 dB ROUT Output Resistance GOUTC Gain at C_OUT @4.43 MHz DCOUTC 4/12 DC Output voltage 30 VIN = 1 VPP -0.5 2.5 5.0 Ω 0 +0.5 dB 2.2 V STV6688 Symbol GCM CToYdel Electrical Characteristics Parameter Test Conditions Gain matching between C inputs VIN = 1 VPP Chroma to Luma delay, Y/C source VPP @4.43 MHz Min. Typ. Max. Unit -0.5 0 +0.5 dB 5 10 ns 5/12 Electrical Characteristics 2.4 STV6688 I²C Bus Characteristics TAMB = 25°C, VCCV = VCCB = VDD = 5V, RLoadYC = 4.7 kΩ, RLoadCVBS = 150 Ω, unless otherwise specified. Parameter Symbol Test Conditions Min. Typ. Max. Unit 0 0.2 V VDD V 10 µA Address Selection Input ADDsel_L Address Selection Low Level ADDsel_H Address Selection High Level ILEAK 2.5 Leakage Current SCL VIL Low Level Input Voltage -0.3 1.5 V VIH High Level Input Voltage 3 5.5 V ILI Input Leakage Current 10 µA VIL Low Level Input Voltage -0.3 1.5 V VIH High Level Input Voltage 3 5.5 V ILI Input Leakage Current 10 µA CI Input Capacitance 10 pF tR Input Rise Time 1.5 V to 3 V 1 µs tF Input Fall Time 3 V to 1.5 V 300 ns Low Level Output Voltage IOL = 3 mA 0.4 V tF Output Fall Time 3 V to 1.5 V 250 ns CL Load Capacitance 400 pF VIN = 0 to 5.5 V -10 0 SDA VOL VIN = 0 to 5.5 V -10 0 Timing (Clock Frequency = 100 kHz, see Note 2) tLOW Clock Low Period 4.7 µs tHIGH Clock High Period 4 µs tSU,DAT Data Setup Time 250 ns tHD,DAT Data Hold Time 0 tSU,STO Setup Time from Clock High to Stop 4 µs 4.7 µs 4 µs 4.7 µs tBUF Start Setup Time following a Stop tHD,STA Start Hold Time tSU,STA Start Setup Time following Clock Low to High Transition Note: 2 The device can also operate at 400 kHz. 6/12 340 ns STV6688 Electrical Characteristics Figure 2: I²C Bus Timings SDA t BUF t LOW tf SCL t HD,STA tr t HD,DAT t HIGH t SU,DAT SDA t SU,STA (Start, Stop) 2.5 t SU,STO I²C Bus Selection The I²C Bus Decoder of the microcontroller provides the Automatic Incrementation mode in Write mode. Data transfers follow the usual I²C format: after the Start condition (S), a 7-bit slave address is sent, followed by an 8-bit word which is a data direction bit (W). An 8-bit sub-address is sent to select a register, followed by an 8-bit data word to be included in the register. S String Format: Write Only mode (S = Start condition, P = Stop condition, A = Acknowledge) SLAVE ADDRESS: 94h A Input Signals Summary: (Write 00h A DATA A P Mode) Data Reg.Addr. (Hex) D7 D6 D5 D4 General Stand-by Buffer Stand-by Always set to 1 D3 D2 D1 D0 Switch Control Input Signal: (Write Mode) Data Byte Reg. Addr. 0x00 Data Description Bits Comments D7 D6 D5 D4 D3 D2 D1 D0 General Stand-by 1 0 1 X X 1 1 X X X X X X X X X X All disabled All active Buffer Stand-by 1 X X 0 1 1 1 X X X X X X X X X X Buffer disabled Buffer active Y/CVBS and C Selection 2 X X X X X X X X 1 1 1 1 X X X X X X X X X X X X 0 0 1 1 0 1 0 1 INT TV IN1 IN2 IN3 7/12 Input/Output Groups 3 STV6688 Input/Output Groups Figure 3: Bottom Clamped Video Inputs (Pins 1, 4, 7 and 19) VCC 5 V VCC 5 V 2 V + VD 15 kΩ tri Protected Pad Figure 4: Average Clamped Video Inputs (Pins 2, 5, 8 and 18) VCC 5 V VCC 5 V IB 25 kΩ 25 kΩ 3V tri Protected Pad Figure 5: Video Outputs (Pins 13, 14 and 16) VCC 5 V V CCB1,2 ...7 5 V IB Protected Pad 8/12 STV6688 Input/Output Groups Figure 6: I²C Bus SDA (Pin 10) VDD 5 V Float Acknowledge 10 kΩ Protected Pad Figure 7: I²C Bus SCL (Pin 11) V DD 5 V Float 10 kΩ Protected Pad 9/12 Package Mechanical Data 4 STV6688 Package Mechanical Data Figure 8: 20-Pin Plastic Single in Line Package (PDIP20) mm Inches Dim. Min. Typ. A Min. Typ. 5.33 Max. 0.210 A1 0.38 A2 2.92 3.30 4.95 0.115 0.130 0.195 b 0.36 0.46 0.56 0.014 0.018 0.022 b2 1.14 1.52 1.78 0.045 0.060 0.070 c 0.20 0.25 0.36 0.008 0.010 0.014 D 24.89 26.92 0.980 e 10/12 Max. 0.015 2.54 1.060 0.100 E1 6.10 6.35 7.11 0.240 0.250 0.280 L 2.92 3.30 3.81 0.115 0.130 0.150 STV6688 Package Mechanical Data Figure 9: 20-Pin Plastic Small Outline Package, 300-mil Width (PSO20) mm Inches Dim. Min. A 2.35 A1 0.10 B 0.33 Typ. Max. Min. 2.65 0.0926 Typ. Max. 0.1043 0.0040 0.51 C 0.0130 0.0200 0.32 0.0125 D 4.98 13.00 0.1961 0.5118 E 7.40 7.60 0.2914 0.2992 e 1.27 0.050 H 10.01 10.64 0.394 0.419 h 0.25 0.74 0.010 0.029 K 0° 8° 0° 8° L 0.41 1.27 0.016 0.050 G 0.10 0.004 Number of Pins N 20 11/12 Package Mechanical Data STV6688 Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. 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