5 4 3 2 E1 EN E4 SEL A/B 3 DGND E2 DGND 1 ENABLE R8 50 OPT 2 5 4 3 2 EXT Z=50 3 JP2 DGND 3 R9 50 OPT A SEL JP4 1 R7 VCC 20K DGND 50 OHM BNC J8 SEL A/B D 1 AGND 2 FLOAT NOTE 2 B EXT 1 JP1 CONTROL 5 4 3 2 1 50 OHM BNC J1 EN 2 Z=50 NOTE 2 D 1 EXT C IN1A IN2A IN3A IN1B IN2B BNC x 6 J12 1 J13 J14 J5 1 1 1 J6 1 J7 1 1 GND U1 LT6555CUF/LT6556CUF L1 Z=75 IN1A L1 Z=75 IN2A L1 L1 L1 L1 Z=75 22 IN1A DGND 23 DGND 24 IN2A VREF 1 VREF 2 IN3A IN3A Z=75 R11 75 R12 75 R4 75 R5 75 OUT3 13 V- 12 8 AGND3 9 IN3B IN3B R10 75 OUT2 15 V+ 14 6 AGND2 7 IN2B IN2B Z=75 OUT1 17 V- 16 3 AGND1 5 IN1B IN1B Z=75 V+ 21 EN EN 20 SEL SEL A/B 19 V+ 18 4 V- R6 75 C1 4700PF C2 0.22UF C3 4700PF C10 4700PF C4 10UF,16V 1206 C7 0.22UF BANANA JACK J2 VCC 3.3V TO 5V C NOTE 3 R1 75 OUT1 Z=75 L2 R2 75 OUT2 Z=75 L2 R3 75 OUT3 Z=75 L2 BNC x 3 J9 5 1 4 3 2 J10 5 1 4 3 2 J11 5 1 4 3 2 OUT1 OUT2 OUT3 V+ 11 V+ 10 25 IN3B 5 4 3 2 5 4 3 2 5 4 3 2 5 4 3 2 5 4 3 2 5 4 3 2 VCC 2 NOTE 3 E5 VREF VEE 3 JP5 VREF B B E3 AGND C5 4700PF SINGLE DUAL 1 3 SUPPLY JP3 2 BANANA JACK J3 AGND C6 OPT C9 10UF,16V 1206 C8 0.22UF BANANA JACK J4 VEE -3.3V TO -5V VEE NOTES: UNLESS OTHERWISE SPECIFIED A 1. ALL RESISTORS ARE IN OHMS, 0402. ALL CAPACITORS ARE 0402. 2. SHDN CONNECTOR IS GENERIC 50 OHMS VERTICAL BNC. 3. VIDEO CONNECTORS ARE CANARE BCJ-BPLH BNC. 4. INSTALL SHUNTS ON JP1-JP5 PIN 1 AND 2. 5. FOR BOARD ASSEMBLY: DC892A-A DC892A-B LT6555CUF LT6556CUF CUSTOMER NOTICE LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. CONTRACT NO. APPROVALS DRAWN: TITLE: CHECKED: APPROVED: ENGINEER: JON M. DESIGNER: 4 3 SIZE DATE: 2 SCHEMATIC 650MHz, HIGH SPEED TRIPLE 2:1 VIDEO MULTIPLEXER A THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 5 TECHNOLOGY KIM T. 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 Fax: (408)434-0507 LTC Confidential-For Customer Use Only DWG NO. DC892A-1 * LT6555CUF/LT6556CUF Wednesday, June 29, 2005 SHEET 1 1 REV A OF 1 A