DG894 Vishay Siliconix Component Video Selector Component Video Switching: RGB + SYNC, S-VHS, Y-C, etc. Audio/Video Routing Digital TV ATE I2C Bus Audio/Video Systems SCART Video Switching Wide Bandwidth: 200 MHz Very Low Crosstalk: –70 dB at 5 MHz CMOS Compatible I2C Bus Compatible Fast Switching—tON: <200 ns Low rDS(on): 44 Single Supply Capability Low Insertion Loss Improved System Performance Reduced Power Consumption Easily Interfaced Future System Expansion via I2C Bus The DG894 is a monolithic video selector designed for switching a variety of component video signals. The low on-resistance and low capacitance of the DG894 make it ideal for video/audio signal routing. Switch control can be through direct CMOS addressing or through the two-wire I2C bus. The DG894 is built on the Vishay Siliconix proprietary D/CMOS process that combines n-channel DMOS switching FETs with low-power CMOS control logic and drivers. Low-capacitance DMOS FETs are used to achieve high levels of off isolation at low cost. Dual-In-Line and SOIC VDD 1 28 C0 Y1 2 27 Y0 C1 3 26 VDD 0 0 I2C GND 4 25 COUT 0 1 I2C Bus Operation, Address A0 = “0” Y2 5 24 YOUT 1 0 0 0 All switches off 1 0 0 1 Y0, C0 C2 6 23 SMO 1 0 1 0 Y1, C1 1 0 1 1 Y2, C2 VSS 7 ROUT 8 GOUT Control Logic/Drivers 9 SMO SEL SDA SCL Function/Switch On Bus Operation, Address A0 = “1” 22 SCL 1 1 0 0 R1, G1, B1, F1 21 SDA 1 1 0 1 R2, G2, B2, F2 SEL 1 1 1 0 R1, G1, B1, F1, Y1, C1 1 1 1 1 R2, G2, B2, F2, Y2, C2 20 BOUT 10 19 R1 FBOUT 11 18 G1 FB2 12 17 B1 R2 13 16 FB1 G2 14 15 B2 Temp Range –40 to 85C –40 to 85C Package Part Number 28-Pin Plastic DIP DG894DJ 28-Pin Wide Body SOIC DG894DW Top View Document Number: 70072 S-52433—Rev. D, 06-Sep-99 www.siliconix.com FaxBack 408-970-5600 5-1 DG894 Vishay Siliconix V+ to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to 19 V Current (Any Terminal) Pulsed 1 ms, 10% Duty Cycle Max . . . . . . . . 40 mA V+ to V– . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to 19 V Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65 to 125C V– to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –10 V to 0.3 V Power Dissipation (Package)a 28-Pin Plastic DIP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 625 mW 28-Pin Wide Body SOIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 450 mW Digital Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GND –0.3 V to (V+) +0.3 V or 20 mA, whichever occurs first Signal Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VSS –0.3 V to 8 V or 20 mA, whichever occurs first Continuous Current (Any Terminal) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 mA Notes: a. All leads welded or soldered to PC board. Test Conditions Unless Otherwise Specified Parameter Symbol Limits –40 to 85C VDD = 12 V, VSS = –5 V VINH = 3 V, VINL = 1.5 Ve Tempa VDD = 12 V, VSS = GND Full 0 4 VDD = 12 V, VSS = –5 V Full –2 2 Minc Typb Maxc Unit Analog Switch Analog Signal Ranged Drain-Source On-Resistance Resistance Match Between Channels VANALOG rDS(on) Room Full 44 51 Room 10 100 150 IS = –10 mA, VD = 0 V DrDS(on) Source Off Leakage Current IS(off) VS = 4 V, VD = 0 V Room Full –10 –100 –0.05 10 100 Drain Off Leakage Current ID(off) VD = 4 V, VS = 0 V Room Full –10 –100 –0.05 10 100 Total Switch On Leakage Current ID(on) VD = VS = 4 V Room Full –10 –100 –0.07 10 100 3 2.55 V W nA Input Input Voltage High VINH Full Input Voltage Low VINL Full 2.55 Input Threshold Vth Room 2.55 TCth Full –200 Temp Coefficient of Input Threshold Input Current Output Voltage Low IIN VIN = GND or VDD Room Full VOL Pin 21, During Acknowledge, IOL = 3 mA Room –1 –20 0.05 1.5 V mV/ C 1 20 mA 0.4 V Dynamic Input Capacitanced Cin Pin 21, 22 Room 3 10 On State Input Capacitanced CS(on) VS = VD = 0 V Room 10 15 Off State Input Capacitanced CS(off) VS = 0 V Room 4 8 Off State Output Capacitanced CD(off) VD = 0 V Room 4 8 BW RL = 50 W , See Figure 1 Room Turn On Time tON 200 tOFF RL = 1 kW , CL = 35 pF, 50% to 90% VSS = –5 V, 0 V, VS = 3 V, See Figure 1 Room Turn Off Time Room 180 RIN = 10 W , RL = 1 kW MH See S Figure Fi d 3 f = 5 MHz, 2 and Bandwidthd pF F 200 500 ns SCL Max Clock Frequency FSCL(MAX) Full Component Crosstalk XTALK(CO) Room –85 Channel Crosstalk XTALK(CH) Room –85 www.siliconix.com FaxBack 408-970-5600 5-2 MHz 100 kHz dB Document Number: 70072 S-52433—Rev. D, 06-Sep-99 DG894 Vishay Siliconix Test Conditions Unless Otherwise Specified Parameter VDD = 12 V, VSS = –5 V VINH = 3 V, VINL = 1.5 Ve Symbol Limits –40 to 85C Tempa Minc Typb Maxc 3 4 8 10 Unit Supply Voltage Positive Supply Current I+ Negative Supply Current I– Room Full All Control Inputs 0 V, 5 V Room Full –8 –10 mA –2.5 –3.0 Notes: a. Room = 25C, Full = as determined by the operating temperature suffix. b. Typical values are for DESIGN AID ONLY, not guaranteed nor subject to production testing. c. The algebraic convention whereby the most negative value is a minimum and the most positive a maximum, is used in this data sheet. d. Guaranteed by design, not subject to production test. e. VIN = input voltage to perform proper function. Purchase of Vishay Siliconix DG894 components conveys a license to use them in the I2C system as defined by Philips. rDS(on) vs. Drain Voltage V+ = 12 V V– = –5 V IS = –10 mA 180 160 140 120 100 85C 80 25C 60 –40C 40 rDS(on) vs. Drain Voltage 200 r DS(on)– Drain-Source On-Resistance ( ) r DS(on)– Drain-Source On-Resistance ( ) 200 V+ = 12 V V– = 0 V IS = –10 mA 180 160 140 120 100 85C 80 25C 60 –40C 40 20 20 –4 –2 0 2 4 VD – Drain Voltage (V) 6 8 0 tON vs. Bipolar Supply Voltage 106 2 4 VD – Drain Voltage (V) 8 tOFF vs. Bipolar Supply Voltage 45.5 V– = –5 V See Figure 1 85C 100 43.5 85C V– = –5 V See Figure 1 94 t OFF (ns) t ON (ns) 6 88 41.5 25C 39.5 25C 82 –40C 37.5 –40C 76 35.5 10.8 11.2 Document Number: 70072 S-52433—Rev. D, 06-Sep-99 11.6 12.0 12.4 V+ – Positive Supply (V) 12.8 13.2 10.8 11.2 11.6 12.0 12.4 V+ – Positive Supply (V) 12.8 13.2 www.siliconix.com FaxBack 408-970-5600 5-3 DG894 Vishay Siliconix tON vs. Unipolar Supply Voltage tOFF vs. Unipolar Supply Voltage 57 108 V– = 0 V See Figure 1 54 100 85C 92 t OFF (ns) t ON (ns) 85C V– = 0 V See Figure 1 84 25C 51 48 25C 45 76 –40C –40C 42 68 10.8 11.2 11.6 12.0 12.4 12.8 10.8 13.2 11.2 11.6 V+ – Positive Supply (V) 12.0 12.4 12.8 13.2 V+ – Positive Supply (V) SDA Output Current vs. Supply Voltage SDA Output Current vs. Temperature 10 12 V– = –5 V 10 V– = 0 V 8 V– = 0 V 8 Current (mA) Current (mA) VOL = 0.4 V TA = 25C 6 Specification Minimum Limit 4 V+= 12 V VOL = 0.4 V V– = –5 V 6 Specification Minimum Limit 4 2 2 0 0 10.8 11.2 11.6 12.0 12.4 12.8 13.2 –40 –20 0 VSUPPLY (V) Component Crosstalk 60 80 100 120 VDS = +12 V VSS = –5 V RIN = 10 RL = 1 k See Figure 2 110 100 VDD = +12 V VSS = –5 V RIN = 10 RL = 1 k See Figure 3 110 100 90 90 dB dB 40 Channel Crosstalk 120 80 80 70 70 60 60 50 50 40 40 1 2 3 4 f – Frequency (MHz) www.siliconix.com FaxBack 408-970-5600 5-4 20 Temperature (_C) 5 10 1 2 3 4 5 10 f – Frequency (MHz) Document Number: 70072 S-52433—Rev. D, 06-Sep-99 DG894 Vishay Siliconix +12 V 5V V+ VS D S Logic Input VO Switch Input IN RL 1 k 3V GND V– 50% CL 35 pF VS 90% Switch Output 0V tON –5 V tOFF CL (includes fixture and stray capacitance) VO = VS RL RL + rDS(on) FIGURE 1. Switching Time B1 BOUT FB1 YOUT or COUT e.g., Y or C e.g., Y1 or C1 R2 10 e.g., Y2 or C2 RL 1 k 10 FBOUT B2 RL 1 k G2 10 1 k VOUT XTALK(CO) 20 log 10 V IN 1 k VOUT XTALK(CH) 20 log10 V IN FIGURE 2. Component Crosstalk FIGURE 3. Channel Crosstalk +12 V C V+ S VS D VO Rg = 75 RL 50 GND V– –5 V FIGURE 4. Bandwidth Document Number: 70072 S-52433—Rev. D, 06-Sep-99 www.siliconix.com FaxBack 408-970-5600 5-5 DG894 Vishay Siliconix 20 16 f a Data Sheet Test Conditions Operating Voltage Area 14 12 10 8 6 4 V+ – Positive Supply Voltage (V) 18 2 –5.5 –5.0 –4.5 –4.0 –3.5 –3.0 –2.5 –2.0 –1.5 –1.0 –0.5 0 –0.0 V– – Negative Supply Voltage (V) FIGURE 5. Symbol Description Y0, Y1, Y2 An analog channel input, typically luminance. C0, C1, C2 An analog channel input, typically chrominance. R1, R2, G1, G2, B1, B2, FB1, FB2 An analog channel input, typically “red”, “green”, “blue” or “fast blanking”, as appropriate. GND Analog and digital ground. VDD Positive supply voltagea VSS Negative supply voltage YOUT , COUT ROUT , GOUT , BOUT , FBOUT An analog channel output, typically luminance or chrominance, as appropriate An analog channel output, typically “red”, “green”, “blue” or “fast blanking”, as appropriate. SMO A low selects serial mode (I2C) operation. A high selects CMOS operation. SDA Serial data lineb SCL Serial clock lineb SEL CMOS control line or I2C addressc select line Notes: a. Both VDD pins (Pin 1 and Pin 26) must be connected for proper operation. b. SDA and SCL pins become CMOS control inputs when SMO = High. c. The SEL pin, in I2C bus operation (i.e., with SMO low), is the least significant bit of the device address. This allows two devices to operate on the same I2C bus, yet retain independent control. www.siliconix.com FaxBack 408-970-5600 5-6 Document Number: 70072 S-52433—Rev. D, 06-Sep-99 DG894 Vishay Siliconix Left1 Right1 –5 V +12 V VSS VDD Y1 YOUT C1 COUT Left Right R1 R1 75 G1 75 B1 75 SYNC1 75 Left2 G1 B1 FB1 +5 V Y2 C2 Right2 75 R2 75 G2 R2 ROUT G2 GOUT B2 BOUT ROUT GOUT 75 B2 75 SYNC2 FB2 BOUT FBOUT SYNCOUT 75 CLC114 +5 V SMO –5 V SEL Control Logic SDA SCL GND Channel Select FIGURE 6. Document Number: 70072 S-52433—Rev. D, 06-Sep-99 www.siliconix.com FaxBack 408-970-5600 5-7 DG894 Vishay Siliconix I2C Bus Operation—RGB Switching Figure 6 shows an inexpensive RGB + stereo selector. The two audio channels are switched via the C, Y terminals. The CLC114 quad video buffer drives four 75- output lines. – number of devices on bus – total bus capacitance – supply voltage (Figure 7). Data Transfer on the I@C Bus Characteristics of the I@C Bus The I@C Bus interface is ideally suited for communication between different ICs or modules. Its salient features are: If the bus is not being used, both SDA and SCL lines must be left high. D Two wire bidirectional serial bus Every byte put onto the SDA line should be eight bits long (MSB first), followed by an acknowledge bit, which is generated by the receiving device. – Serial data (SDA) and serial clock (SCL) lines D Multi-master system (built-in arbitration for multi-master systems) Each data transfer is initiated with a start condition and ended with a stop condition. The first byte after a start condition is always the address byte. If this is the device’s own address, the device will generate an acknowledge by pulling the SDA line low during the ninth clock pulse, then accept the data in subsequent bytes until another start or stop condition is detected. D Devices have independent clocks D Master and slave devices can be receivers and/or transmitters. D Each device has a unique address. D Maximum bus clock rate of 100 kHz. The eight bit of the address byte is the read/write bit (high = read from addressed device, low = write to the addressed device) so, for the DG894, the address is only considered valid if the R/W bit is low. D Any number of interfaces may be connected to the bus – Limited only by total capacitance of 400 pF – Each pin on bus limited to 10-pF capacitance – Input levels: VIL max = 1.5 V (fixed supply operation) VIH min = 3 V (fixed supply operation) VIL max = 0.3 VDD (wide range supply operation) VIH min = 0.7 VDD (wide range supply operation) Data bytes are always acknowledged during the ninth clock pulse by the addressed device. Note that during the acknowledge period the transmitting device must leave the SDA line high. Premature termination of the data transfer is allowed by generating a stop condition at any time. When this happens, the DG894 will remain in the state defined by the last complete data byte transmitted. System Configuration Rp value depends on: Rp Rp SCL SDA Master Transmitter/ Receiver Master Transmitter Peripheral Device Peripheral Device FIGURE 7. www.siliconix.com S FaxBack 408-970-5600 5-8 Document Number: 70072 S-52433—Rev. D, 06-Sep-99 DG894 Vishay Siliconix SDA SDA SCL SCL STA STO Start Condition Stop Condition FIGURE 8. START and STOP Conditions SDA MSB acknowledgement signal from receiver byte complete, interrupt within receiver acknowledgement signal from receiver clock line held low while interrupts are serviced SCL 1 2 7 8 STA 9 ACK 1 Start Condition 2 3-8 9 ACK STO Stop Condition FIGURE 9. Data Transfer on the I2C Bus Timing Specifications of the IC Bus IC Bus Protocol IC bus load conditions for timing specifications are as follows: The DG894 is a slave receiver type of IC interface and has four allocated addresses, two of which are user programmable through the SEL pin. Additional addresses may be obtained by a metal mask option for users requiring more than two DG894s on the same IC bus. Contact Vishay Siliconix marketing for further information. 4 kW pull-up resistors to +5 V; 200 pF capacitor to ground. All values are referred to VIH = 3 V, VIL = 1.5 V. Parameter SCL Clock Frequency Bus Free Before Start Symbol Min Max Unit fscl – 100 kHz tBUF 4.7 – Start Condition Set-up Time tSU;STA 4.7 – Start Condition Hold Time tHD;STA 4 – SCL and SDA Low Period tLOW 4.7 – SCL and SDA High Period tHIGH 4 – SCL and SDA Rise Time tr – 1.0 SCL and SDA Fall Time tf – 0.3 Data Set-Up Time (WRITE) tSU;DAT 0.25 – Data Hold Time (WRITE) tHD;DAT 0* – *A transmitter must internally provide at lease a hold time to bridge the undefined region (max 300 ns) of the falling edge of the SCL. Document Number: 70072 S-52433—Rev. D, 06-Sep-99 After the correct address has been sent, only one data byte is needed to define the switch configuration. Subsequent data put onto the bus will update the switches until a STOP condition (or another START condition) signals that the device is no longer being addressed. The switches will then remain in their last configuration as long as power is maintained to the chip. ms Power on Reset A power on reset function is provided on the DG894 to turn all switches off following power up if the IC mode is selected. In the CMOS control mode, the switches are selected according to the state of the control inputs. www.siliconix.com FaxBack 408-970-5600 5-9 DG894 Vishay Siliconix SDA tBUF tR tF tHD;STA SCL tLOW tHD;STA STO tHIGH tSU;DAT STA tSU;STA tSU;STO STA tHD;DAT STO FIGURE 10.I2C Bus Timing Diagram Minimum Bit Stream to Set Up DG894 Switches STA 1 1 0 1 1 Address Byte STA A1 A0 R/W ACK D4 D4 D3 D3 D2 D2 D1 D1 D0 D0 STO A0 R/W ACK X X X D4 D3 D2 D1 D0 ACK STO Data Byte = START CONDITION = 0 (programmable to “1” with metal mask change) = SEL. Address bit set by use (address is inverse of SEL logic level) = READ/WRITE bit (must be “0”, only WRITE mode allowed for DG894) = Acknowledge bit (“0”) generated by DG894 = 0 –– R2, G2, B2, and FB2 switches off = 1 –– R2, G2, B2, and FB2 switches on = 0 –– R1, G1, B1, and FB1 switches off = 1 –– R1, G1, B1, and FB1 switches on = 0 –– Y2, C2, switches off = 1 –– Y2, C2, switches on = 0 –– Y1, C1, switches off = 1 –– Y1, C1, switches on = 0 –– Y0 and C0 switches off = 1 –– Y0 and C0 switches on = STOP CONDITION www.siliconix.com FaxBack 408-970-5600 5-10 A1 Document Number: 70072 S-52433—Rev. D, 06-Sep-99