MAX7461 Loss-of-Sync Alarm General Description Features The MAX7461 single-channel loss-of-sync alarm (LOS) Accepts CVBS, Y, or Any Other Video with Sync provides composite video sync detection in NTSC, Loss-of-Sync Alarm Output PAL, and SECAM standard-definition television (SDTV) systems. The MAX7461s advanced detection circuitry Robust Performance in Noisy Environments delivers robust performance by preventing false loss- Wire-OR Alarm Output of-sync alarms due to noise. The device accepts an AC-coupled composite (CVBS), luma (Y), or any other NTSC, PAL, and SECAM video signal with sync, and outputs a logic-level signal. Small 5-Pin SOT23 Package The open-drain LOS output is low when no sync is detected and high impedance when sync is detected. The device operates from a single +5V supply. Pin Configuration The MAX7461 is available in a 5-pin SOT23 package and is specified for operation over the -40C to +85C TOP VIEW temperature range. IN 15V CC Applications MAX7461 Security Systems GND 2 Consumer Electronics GND34 LOS Ordering Information SOT23 PIN- PACKAGE PART TEMP RANGE PACKAGE CODE MAX7461EUK -40C to +85C 5 SOT23 U5-2 Functional Diagram +5V 0.1F V CC 5 V CC SYNC MAX7461 SLICE RO LEVEL 1k SYNC C IN LOS SYNC LOS IN DETECTOR FILTER CLAMP LPF 4 1 0.1F 75 GND 3 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrateds website at www.maximintegrated.com. 19-0553 Rev 1 4/13MAX7461 Loss-of-Sync Alarm ABSOLUTE MAXIMUM RATINGS V to GND..............................................................-0.3V to +6V Operating Temperature Range CC LOS to GND..............................................................-0.3V to +6V MAX7461EUK ...................................................-40C to +85C IN to GND.................-0.3V to the lower of +6V and (V + 0.3V) Storage Temperature Range .............................-65C to +150C CC Continuous Power Dissipation (T = +70C) Lead Temperature (soldering, 10s) .................................+300C A 5-Pin SOT23-5 (derate 7.1mW/C above +70C) ......571.0mW Junction Temperature......................................................+150C Maximum Current Into Any Pin.........................................50mA Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS (V = +4.5V to +5.5V, GND = 0, C = 0.1F, RO = 500, T = -40C to +85C, unless otherwise noted. Typical values are at T = CC IN A A +25C.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS AC CHARACTERISTICS Minimum Input Sync Height V AC-coupled (Note 1) 105 130 mV IN-MIN P-P Maximum Input Voltage V AC-coupled 2.4 V IN-MAX P-P LOS Release Time t (Note 2) 1.7 2.2 2.7 RT ms LOS Detect Time t (Note 3) 1.9 3.4 4.9 DT DIGITAL CHARACTERISTICS Output Low Voltage V I = 10mA 0.4 V OL SINK Logic High Leakage Current I 1A OLEAK POWER REQUIREMENTS Supply Voltage V 4.5 5.0 5.5 V CC Supply Current I 1.7 2.2 mA CC Power-Supply Noise Immunity V 0 to 5MHz sinusoid on V (Note 4) 200 mV PSNI CC P-P Note 1: Minimum input sync height is the voltage above which LOS is guaranteed to be in high-impedance mode after the maximum LOS time-constant time. Note 2: LOS release time is the time that the video input must be continuously present before LOS goes high (inactive state). Note 3: The LOS detect time is the time that the video input must be continuously absent before LOS goes low (active state). Note 4: The MAX7461 LOS output is accurate with a power-supply noise level below V . PSNI 2 Maxim Integrated