7 x 5 Video Matrix Switch 1 Overview 1.1 Features ● ● ● ● ● ● ● ● ● ● ● ● ● TDA 6920 Fast I2C Bus controlled (max. 400 kHz) Cascadable (2 bus addresses) 7 CVBS inputs, 5 outputs 3 inputs with clamp disable by bus 1 input selectable as Y-input (S-VHS) 1 additional C-input (S-VHS) Y+C operation for S-VHS selected by bus Fully ESD protected – 60 dB max. crosstalk at 5 MHz (P-DSO-28-1 only) Low operating voltage of 7.5 V 5 V operation is possible with reduced output signals of max. 2 Vpp 15 MHz minimum bandwidth Noise insensitive clamping inputs Low impedance off condition separate for each output P-DIP-18-5 P-DSO-28-1 Type Ordering Code Package TDA 6920 Q67000-A5200 P-DIP-18-5 TDA 6920X Q67007-A5225 GEG P-DSO-28-1 1.2 General Description The TDA 6920 switches 7 video input sources to 5 outputs. Each output can be switched to only one input, but one input can be switched to all outputs. The C-input may be combined with one CVBS input as Y for Y+C (S-VHS) operation. Y+C operation is selected by bus. 1.3 ● ● ● Application Television sets Satellite receivers Video mixing desks Semiconductor Group 1 12.96 TDA 6920 1.4 Pin Configuration (top view) P-DIP-18-5 P-DSO-28-1 Figure 1 Semiconductor Group 2 TDA 6920 1.5 Pin Definitions and Functions Pin No. Symbol Function P-DIP-18-5 P-DSO-28-1 – 1 GND Signal and power supply ground 2 2 IN1 CVBS input 1 – 3 GND Signal and power supply ground 3 4 IN2 CVBS input 2 – 5 GND Signal and power supply ground 4 6 IN3 CVBS input 3 – 7 GND Signal and power supply ground 5 8 IN4 CVBS input 4 – 9 GND Signal and power supply ground 6 10 IN5 CVBS input 5 – 11 VREF Reference Voltage for external use 7 12 IN6 CVBS input 6 9 13 GND Power supply groung 8 14 IN7 CVBS input 7 10 15 SCL I2C-Bus clock 11 16 SDA I2C-Bus data 12 17 ADDRESS Address selection 13 18 OUT5 CVBS output 5 – 19 GND Signal and power supply ground 14 20 OUT4 CVBS output 4 – 21 GND Signal and power supply ground 15 22 OUT3 CVBS output 3 – 23 GND Signal and power supply ground 16 24 OUT2 CVBS output 2 – 25 GND Signal and power supply ground 17 26 OUT1 CVBS output 1 18 27 VCC Positive power supply voltage 1 28 C Separate color adding input for input 1 Semiconductor Group 3 TDA 6920 Overview 1.6 Pin Description C (color input) In 2, 5, 6, 7 (CVBS input) In 2, 3, 4 (CVBS input) SCL, Address Semiconductor Group 4 TDA 6920 Overview SDA Out 1-5 (CVBS output) VREF (SO-28 only) Semiconductor Group 5 TDA 6920 1.7 Functional Block Diagram Figure 2 Block Diagram (P-DSO-28-1) Semiconductor Group 6 TDA 6920 2 Functional Description The main function of the IC is to switch 7 input video sources to 5 outputs. Each output can be switched to only one input. It is possible to have the same input connected to several outputs. 3 of the inputs can be used as non-clamping-input, switching is controlled by bus. The clamping function of the other 4 inputs can be overriden by external resistor divider. The other 4 inputs can be switched to non-clamping mode with external R/C network. All switching possibilities are controlled by the I2C Bus. All outputs can be switched to low impedance off condition by the I2C Bus. Driving 75 Ω load requires external transistors for best performance. The recommended coupling capacitor at each input is 47 nF. Each clamping input requires a 75 Ω (max. 500 Ω) termination resistor. Operation without or with a termination resistor greater than 500 Ω causes malfunction of the new high performance clamping circuit. Unused inputs should be directly grounded. 6 × 8 bits are necessary to determine one complete configuration change. (1 addressbyte, 5 databytes) Minimum configuration change for 1 output needs 2 × 8 bit (1 addressbyte, 1 databyte). Power on reset state: all 5 outputs switched to input 1, all inputs clamped, Y+C off. ● Address Selection (fast I2C Bus) 1st byte of transmisson (8 bit) Hex Binary Address Pin MSB LSB 96 1001 0110 VCC (min. 3 V) 94 1001 0100 GND Semiconductor Group 7 TDA 6920 ● Data Mode Selections (fast I2C Bus) 2nd byte of transmission (8 bit) Output Selection (3 bit, bit 7 must always be 0) b7 b61) b5 b4 b3 b2 b1 b01) Selected Output 0X 000 XXX - not used 0X 001 XXX OUT1 0X 010 XXX OUT2 0X 011 XXX OUT3 0X 100 XXX OUT4 0X 101 XXX OUT5 0X 110 XXX - not used 0X 111 XXX - not used 1) ..X = don’t care Input Selection Clamped (3 bit, bit 7 must always be 0) b7 b6 b5 b4 b31) b2 b1 b0 Selected Input 0X XXX 000 Output off condition 00 XXX 001 IN1 00 XXX 010 IN2 00 XXX 011 IN3 00 XXX 100 IN4 0X XXX 101 IN5 0X XXX 110 IN6 0X XXX 111 IN7 1)..X = don’t care Semiconductor Group 8 TDA 6920 ● Data Mode Selections (fast I2C Bus) continued 2nd byte of transmission (8 bit) Input Selection Non Clamped / Y+C (Y: always clamped. C: non clamped) (3 bit, bit 7 must always be 0) b7 b6 b5 b4 b31) b2 b1 b0 Selected input 00 XXX 001 in1, (Y+C) off 00 XXX 010 in2, clamp on 00 XXX 011 in3, clamp on 00 XXX 100 in4, clamp on 01 XXX 001 in1, (Y+C) on 01 XXX 010 in2, clamp off 01 XXX 011 in3, clamp off 01 XXX 100 in4, clamp off 1) ● X = don’t care (if only input operation mode change is requested, b5, b4 b3 should be 0, 0, 0: no output configuration is changed.) Bus Protocol (fast I2C Bus) Programming Example: SDA sequence address 96H 1st data: output 4 connect to input 3 clamped start condition serial data stream 10 MSB LSB ..... 1001 0110 data: output 5 connect to input 1 (Y+C) ..... Semiconductor Group mode output input 01 101 001 mode output input 00 100 011 last data: output 1 connect stop to input 4 not clamped condition ..... 9 mode output input 01 001 100 01 TDA 6920 3 Electrical Characteristics 3.1 Absolute Maximum Ratings Parameter Supply voltage (VCC ) Reference voltage (P-DSO-28-1 only) Symbol VCC VREF Reference current (RLmin = 1 kΩ) IREF Output voltage VOUT1 - OUT5 IOUT1 - OUT5 Output current (RLmin = 500 Ω) VC Input voltage VIN1 - IN7 SCL, SDA, address input VSDA, SCL, Input voltage voltage Storage temperature Thermal resistance (system - air) Unit min. max. 0 14 V 0 5 V 3.5 mA VCC V 5 mA V 0 VCC VCC VCC –6 6 kV 150 °C 125 °C 75 K/W 0 0 0 Test Condition V V Address ESD-voltage all pins HBM VESD (R = 1.5 kΩ, C = 100 pF) Junction temperature Limit Values Tj Tstg Rth SA – 40 Note: Maximum ratings are absolute ratings; exceeding only one of these values may cause irreversible damage to the integrated circuit. Semiconductor Group 10 TDA 6920 3.2 Operating Range Parameter Supply voltage Absolute minimum supply voltage (only usable with reduced output signals of max. 2 Vpp) Symbol Limit Values min. max. VCC VCC 7.5 13.2 VREF 3.3 4.5 Unit V V 3.9 V Video-input frequency range – ƒIN IN1 - IN7, C 0 3 dB 20 MHz Video-input AC-voltage (color) VC 1.0 Vpp Reference voltage (P-DSO-28-1 only) Video-input AC-voltage (Y, CVBS) VIN1 - IN7 1.7 Vpp Video-output AC-voltage VOUT1 - OUT5 VC 1.3 VIN1 - IN7 1.8 VIN2, 3, 4 1.5 3.4 Vpp 2.3 V 3.5 V 3.2 V Input DC-voltage Input DC-voltage (clamping) Input DC-voltage (non clamping) Test Condition Input source-impedance (clamping) RI IN1 - IN7 0 500 Ω I2C-Bus clock ƒIN SDA, SCL 0 500 kHz Ambient temperature during operation TA – 10 85 °C Note: In the operating range the functions given in the circuit description are fulfilled. Semiconductor Group 11 TDA 6920 3.3 DC Characteristics TA = 25 °C, VCC = 8.5 V Parameter Symbol Limit Values min. Total current consumption ICC Unit Test Condition typ. max. 42 58 mA 3.6 3.8 V RL = ∝ RL = ∝ Reference voltage (P-DSO-28-1 only) VREF Output DC-voltage (clamping) VOUT1 - OUT5 1.8 V VC, IN1 - IN7 = 0 Vpp Output DC-voltage (output off) VOUT1 - OUT5 0.8 V VC, IN1 - IN7 = 0 Vpp Output current IOUT1 - OUT5 0.5 1.0 mA VOUT = 2 V, 3.4 2.0 In = 0 Vpp Input DC-voltage Input DC-voltage (clamping) Input current (clamping) Input DC-voltage (for ext. clamping override) Input DC-voltage (nonclamping, Bus controlled) VC VIN1 - IN7 1.8 V 1.8 V IIN1 - IN7 VIN1 - IN7 0.33 2.4 V IIN1 - IN7 = 0 Vpp VIN1 - IN7 = 0 Vpp VIN2, 3, 4 2.4 V VIN2, 3, 4 = 0 Vpp µA VSDA, SCL = 0 V VAddress = 0 V VSDA = 0.6 V ISDA = 3 mA sink ISDA = 3 mA sink ISDA, SCL IAddress Output current (SDA) ISDA Output voltage low (SDA) VSDA VSDA SCL, SDA, address VSDA, SCL (96 hex) : high VAddress SCL, SDA, address VSDA, SCL (94 hex) : low VAddress SCL, SDA, address VSDA, SCL (hysteresis) VAddress Input current (SCL, SDA, address) Semiconductor Group 0.1 1 0.4 6 µA mA 0 0 0.2 0.3 0.4 0.6 V V 3.0 VCC V 0 1.5 V 0.2 1 V 12 VC = 0 Vpp VIN1 - IN7 = 0 Vpp dependant on input frequency TDA 6920 3.4 AC Characteristics TA = 25 °C, VCC = 8.5 V Parameter Video bandwidth Video gain Symbol POUT/IN VOUT/IN Limit Values min. typ. 15 20 1.9 2.0 2.1 Unit Test Condition max. MHz – 3 dB point Crosstalk (0 - 5 MHz) P-DSO-28-1 A – 65 – 60 dB inputs 75 Ω to GND Crosstalk (0 - 5 MHz) P-DSO-28-1 A – 55 – 50 dB inputs 500 Ω to GND Crosstalk (0 - 5 MHz) P-DIP-18-5 A – 62 – 60 dB inputs 75 Ω to GND Crosstalk (0 - 5 MHz) P-DIP-18-5 A – 45 – 50 dB inputs 500 Ω to GND 0.75 1 Vpp sinus 1 1.5 Vpp clamped 1 1.5 Vpp non clamped VC Input AC-voltage VIN1 - IN7 Input AC-voltage (sinus) VIN2, 3, 4 Input AC-voltage Output AC-voltage VOUT1 - OUT5 2 3 Vpp I2C-Bus clock ƒIN SDA, SCL 400 500 kHz Output linearity DGOUT1- 0.2 1 % RL = ∝ OUT5 Input resistance (non-clamping) RC, IN2, 3, 4 40 50 Input source-impedance (clamping) RIN1 - IN7 0 75 Input coupling-capacitor (clamping) CIN1 - IN7 47 10 Output dyn. impedance ROUT1 - OUT5 50 kΩ 500 Ω nF µF 75 CVBS-signal > 20 Hz Audiosignal Ω Note: The listed characteristics are ensured over the operating range of the integrated circuit. Typical characteristics specify mean values expected over the production spread. If not otherwise specified, typical characteristics apply at TA = 25 °C and the given supply voltage. Semiconductor Group 13 TDA 6920 4 Test Circuits Figure 3 Test Circuit (P-DSO-28-1) Semiconductor Group 14 TDA 6920 Figure 4 Test Circuit (P-DIP-18-5) Semiconductor Group 15 TDA 6920 5 Application Circuits Figure 5 Application Circuit P-DSO-28-1 (clamping inputs) Semiconductor Group 16 TDA 6920 Figure 6 Application Circuit P-DSO-28-1 (no clamping inputs with clamping overide) Semiconductor Group 17 TDA 6920 Figure 7 Application Circuit (P-DIP-18-5) Semiconductor Group 18 TDA 6920 6 Electrical Diagrams Typical frequency response and crosstalk (simulated) for P-DSO-28-1 package Conditions: VCC = 8.5 V, all outputs selected to one different input; response: the measured output has max. signal on the selected input; crosstalk: the measured output has no signal on the selected input, another input has max. signal Semiconductor Group 19 TDA 6920 7 Package Outlines GPD05586 P-DIP-18-5 (Plastic Dual in-line Package) GPS05123 P-DSO-28-1 (Plastic Dual Small Outline Package) Sorts of Packing Package outlines for tubes, trays etc. are contained in our Data Book “Package Information”. SMD = Surface Mounted Device Semiconductor Group 20 Dimensions in mm