STV6415A I²C bus-controlled video matrix switch Features ■ 20 MHz bandwidth ■ Cascadable with another STV6415A (internal address can be changed by pin 7 voltage) ■ Eight inputs (CVBS, RGB, Chroma, …) ■ Six outputs ■ Possibility of chroma signal for each input by switching off the clamp with an external resistor bridge Description ■ I²C bus-controlled ■ 6.5 dB gain between any input and output The main function of the STV6415A is to switch eight video input sources on the six outputs. ■ –55 dB crosstalk at 5 MHz ■ Full ESD protection Each output can be switched to only one of the inputs, whereas any single input may be connected to several outputs. All switching possibilities are controlled through the I²C bus. Table 1. August 2008 Rev 1 Device summary Order code Packaging STV6415AB SO 20 Plastic small outline package 1/15 www.st.com 1 STV6415A 1 General description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2.3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2.4 I²C bus characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.5 I²C bus selections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.5.1 3 2.6 Input/output pin configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.7 Using a second STV6415A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.8 Application diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 3.1 4 2/15 Second and following bytes (input/output selection) . . . . . . . . . . . . . . . . 8 Environmental . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 STV6415A 1 General description General description Figure 1. STV6415A Pin-out diagram Input 1 Data 2 S 20 Input 19 Ground 18 Output Input 3 Clock 4 V 17 Output Input 5 6 16 Output 15 Output 14 Output 13 Output Input 6 T 4 1 Prog 7 Input 8 VCC 9 12 Ground Input 10 11 Input 5 A 3/15 General description Figure 2. STV6415A STV6415A block diagram OutputOutputOutputOutputOutputOutput Ground Input 1 Input 3 Input 5 Input 6 Input 8 Input 10 Input 11 Input 20 16 17 15 14 13 12 STV6415A 18 Bus Decoder 2 7 4 9 Data Prog Clock VCC 19 Ground The main function of the STV6415A is to switch eight video input sources on the six outputs. Each output can be switched to only one of the inputs, whereas any single input may be connected to several outputs. The lowest level of each signal is aligned on each input (bottom of sync pulse for CVBS or Black Level for RGB signals). The nominal gain between any input and output is 6.5 dB. For Chroma signals, the alignment is switched off by forcing, with an external 5 VDC resistor bridge on the input. Each input can be used as a normal input or as a Chroma input (with external resistor bridge). All the switching possibilities are changed through the I²C bus. Driving a 75 Ω load requires an external transistor. The switch configuration is defined by words of 16 bits: the I²C address (8 bits) then one output configuration (8 bits). Therefore, six separated words of 16 bits are necessary to determine the starting configuration at power-on (power supply: 0 to 10 V). A new configuration needs only the words (16 bits) of the changed output channels. 4/15 STV6415A Electrical characteristics 2 Electrical characteristics 2.1 Absolute maximum ratings Table 1. Absolute maximum ratings Symbol VCC TA TSTG Parameter Supply voltage (pin 9) Operating ambient temperature range Storage temperature range 2.2 Thermal data Table 2. Thermal data Symbol RthJA 2.3 Value Parameter Junction-to-ambient thermal resistance SO20 Unit 12 V 0 to +70 oC –20 to +150 oC Value Unit o 100 C/W Electrical characteristics (TA = 25 °C , VCC = 10 V , RLOAD = 10 kΩ , CLOAD = 3 pF (unless otherwise specified) Table 3. Electrical characteristics Symbol Parameter Min. Typ. Max. Unit VCC Supply voltage (pin 9) 8 10 11 V ICC Power supply current (without load on outputs; VCC = 10 V) 14 19 25 mA 2 VPP 1 3 µA 3.6 3.9 V 5 100 mV Inputs Signal amplitude (CVBS signal) Input current (input voltage = 5 VDC) DC level 3.3 DC level shift (temperature from 0 to 70°C) Outputs (VIN = 1 VPP for all dynamic tests) Pins 13,14, 15, 16, 17 and 18 Dynamic 4.5 Bandwidth Crosstalk –1dB attenuation –3dB attenuation f = 3.58 MHz f = 5 MHz VPP 25 50 Ω 6 6.5 7 dB 7 15 20 Output impedance Gain 5.5 –60 –55 MHz –50 –45 dB 5/15 Electrical characteristics Table 3. STV6415A Electrical characteristics (continued) Symbol Parameter DC Level Min. Typ. Max. Unit 2.40 3.05 3.50 V Minimum output load (RLOAD) 2.4 2 kΩ I²C bus characteristics (TA = 25 °C , VCC = 10 V) Table 4. I²C bus characteristics Symbol Parameter Test conditions Min. Max. Unit 1.00 1.65 V PROG (pin 7) Threshold voltage (typical value is 1.3) SCL (pin 4) VIL Low level input voltage –0.3 +1.0 V VIH High level input voltage 2.3 VCC + 0.3 V ILI Input leakage current –10 +10 µA 0 100 kHz fSCL VI = 0 to VCC Clock frequency tR Input rise time 1.5 V to 3 V 1000 ns tF Input fall time 3 V to 1.5 V 300 ns CI Input capacitance 10 pF SDA (pin 2) VIL Low level input voltage –0.3 +1.0 V VIH High level input voltage 2.3 VCC + 0.3 V ILI Input leakage current –10 +10 µA CI Input capacitance 10 pF tR Input rise time 1.5 V to 3 V 1000 ns tF Input fall time 3 V to 1.5 V 300 ns IOL = 3mA 0.4 V 3 V to 1.5 V 250 ns 400 pF VOL Low level output voltage tF Output fall time CL Load capacitance VI = 0 to VCC Timing tLOW Clock low period 4.7 µs tHIGH Clock high period 4.0 µs tSU, DAT Data set-up time 250 ns tHD, DAT Data hold time tSU, STO Set-up time from clock high to stop 6/15 0 4.0 340 ns µs STV6415A Table 4. Electrical characteristics I²C bus characteristics (continued) Symbol tBUF Parameter Test conditions Min. Max. Unit Start set-up time following a stop 4.7 µs tHD, STA Start hold time 4.0 µs tSU, STA Start set-up time following clock low-to-high transition 4.7 µs Figure 3. I²C bus timing SDA tBUF tF tLOW SCL tHD,STA tR tHD,DAT tHIGH tSU,DAT SDA tSU,STA (start, stop) 2.5 tSU,STO I²C bus selections The I²C chip address is defined by the first byte. The second and following bytes define the input/output configurations. Table 5. First byte (address) 0x86 0b1000 0110 When PROG pin is connected to Ground 0x06 0b0000 0110 When PROG pin is connected to VCC 7/15 Electrical characteristics STV6415A 2.5.1 Second and following bytes (input/output selection) Table 6. I²C bus output selections Output address (MSB) Input address (LSB) 00000 XXX Pin 18 00100 XXX Pin 14 00010 XXX Pin 16 00110 --- 00001 XXX Pin 17 00101 XXX Pin 13 00011 XXX Pin 15 00111 --- Table 7. Selected output Not used Output is selected by the 5 MSBs. Not used I²C bus input selections Output address (MSB) Input address (LSB) Selected input 00XXX 000 Pin 5 00XXX 100 Pin 8 00XXX 010 Pin 3 00XXX 110 Pin 20 00XXX 001 Pin 6 00XXX 101 Pin 10 00XXX 011 Pin 1 00XXX 111 Pin 11 Input is selected by the 3 LSBs. Example: 00100 101 connects pin 10 (input) to pin 14 (output) (equals 25 in hexadecimal) 8/15 STV6415A Electrical characteristics 2.6 Input/output pin configurations Figure 4. Input configuration Figure 5. Output configuration VCC VCC 30 kΩ x3 All Video Outputs 0.36 VCC 14 kΩ 23 kΩ Pins 1, 3, 5, 6, 8, 10, 11 and 20 Figure 6. Pins 13, 14, 15, 16, 17 and 18 Bus I/O configuration Figure 7. VCC pin configuration VCC 50 kΩ 9 Pins 2, 4 and 7 VREF 10 kΩ * 20 kΩ ACK 20 kΩ 150 Ω 150 Ω * For Pin 2 (Data) Only) 2.7 Using a second STV6415A The programming input pin (PROG) allows two STV6415A circuits to operate in parallel, and to select them independently through the I²C bus by modifying the address byte. Consequently, the switching capabilities are doubled, or IC1 and IC2 can be cascaded. 9/15 Electrical characteristics Figure 8. STV6415A Cascadable STV6415A configuration PROG Logical “0” IC1 MCU Video inputs Video outputs PROG Logical “1” Video inputs 10/15 IC2 Video outputs STV6415A 2.8 Electrical characteristics Application diagram Whenever an input is not used, it must be bypassed to ground through a 220 nF capacitor. Note: The application diagram presented here is an example only and is subject to change without notice. The real application diagram will depend on application conditions and constraints. Figure 9. Application diagram 100 kΩ 22 µF CEXT 11 75 Ω 75 Ω 220 nF Input Input YEXT 10 100 kΩ 100 µF 10 Ω 12 Ground VCC 9 Output Input 8 VCC (10 V) 220 nF CVBSOUT2 13 CVBS 3 220 nF 10 kΩ 14 COUT2 Output Prog 75 Ω Prog (Bus) 7 10 kΩ 100 kΩ 22 µF YOUT2 15 Output Input CINT 6 100 kΩ 10 kΩ 75 Ω 220 nF CVBSOUT1 16 Output Input YINT 5 75 Ω 10 kΩ COUT1 17 Output Clock 4 18 Output Input 3 Clock (Bus) 10 kΩ 220 nF YOUT1 CVBS 2 10 kΩ Y, C Adder 75 Ω 19 Ground Data 2 20 Input Input 1 220 nF Y+C 75 Ω Y, C Separator Data (Bus) 220 nF CVBS 1 75 Ω 11/15 Package mechanical data 3 STV6415A Package mechanical data Figure 10. 20-pin plastic SO (small outline) package, 300-mil width D h x 45° L A1 A C k e B G Seating Plane E H Table 8. SO20 package mm inches Dim. Min. Typ. Max. Min. Typ. Max. A 2.35 2.65 0.0926 0.1043 A1 0.10 0.30 0.0040 0.0118 B 0.33 0.51 0.0130 0.0200 C 0.32 0.0125 D 12.60 13.00 0.4961 0.5118 E 7.40 7.60 0.2914 0.2992 e 1.27 0.050 H 10.00 10.65 0.394 0.419 h 0.25 0.74 0.010 0.029 k 0° 8° 0° 8° L 0.40 1.27 0.016 0.050 G 0.10 0.004 Number of pins N 12/15 20 STV6415A 3.1 Package mechanical data Environmental In order to meet environmental requirements, STMicroelectronics offers the STV6415A in ECOPACK® packages. These packages have a lead-free second level interconnect. The category of second level interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an ST trademark. ECOPACK specifications are available at www.st.com. The ECOPACK version can be identified by the letter ‘E’ beside the ST logo. Both types are compatible with ROHS. 13/15 Document revision history 4 Document revision history Table 9. 14/15 STV6415A Document revision history Date Revision 28-Aug-2008 1 Changes Initial Release STV6415A Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. Purchasers are solely responsible for the choice, selection and use of the ST products and services described herein, and ST assumes no liability whatsoever relating to the choice, selection or use of the ST products and services described herein. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. 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