MAX7461EUK+

MAX7461EUK+ Datasheet

MAX7461 Loss-of-Sync Alarm

Part	Datasheet
MAX7461EUK+	MAX7461EUK+ (pdf)

PDF Datasheet Preview
MAX7461 Loss-of-Sync Alarm The MAX7461 single-channel loss-of-sync alarm LOS provides composite video sync detection in NTSC, PAL, and SECAM standard-definition television SDTV systems. The MAX7461’s advanced detection circuitry delivers robust performance by preventing false lossof-sync alarms due to noise. The device accepts an AC-coupled composite CVBS , luma Y , or any other video signal with sync, and outputs a logic-level signal. 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. The MAX7461 is available in a 5-pin SOT23 package and is specified for operation over the -40°C to +85°C temperature range. Accepts CVBS, Y, or Any Other Video with Sync Loss-of-Sync Alarm Output Robust Performance in Noisy Environments Wire-OR Alarm Output NTSC, PAL, and SECAM Small 5-Pin SOT23 Package Pin Configuration TOP VIEW Security Systems Consumer Electronics Ordering Information PART TEMP RANGE PINPACKAGE MAX7461EUK -40°C to +85°C 5 SOT23 PACKAGE CODE U5-2 5 VCC MAX7461 GND 2 GND 3 4 LOS SOT23 Functional Diagram CIN IN 1 0.1uF 75Ω +5V 0.1uF VCC 5 SYNC SLICE LEVEL CLAMP GND 3 MAX7461 SYNC SYNC LOS DETECTOR FILTER RO 1kΩ LOS 4 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s website at MAX7461 Loss-of-Sync Alarm ABSOLUTE MAXIMUM RATINGS VCC to GND to +6V LOS to +6V IN to GND.................-0.3V to the lower of +6V and VCC + 0.3V Continuous Power Dissipation TA = +70°C 5-Pin SOT23-5 derate 7.1mW/°C above +70°C ......571.0mW Maximum Current Into Any Pin Operating Temperature Range MAX7461EUK to +85°C Storage Temperature Range .............................-65°C to +150°C Lead Temperature soldering, 10s .................................+300°C Junction Temperature 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 VCC = +4.5V to +5.5V, GND = 0, CIN = 0.1µF, RO = 500Ω, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C. PARAMETER CONDITIONS TYP MAX UNITS AC CHARACTERISTICS Minimum Input Sync Height VIN-MIN AC-coupled Note 1 130 mVP-P Maximum Input Voltage LOS Release Time LOS Detect Time DIGITAL CHARACTERISTICS VIN-MAX tRT tDT AC-coupled Note 2 Note 3 VP-P Output Low Voltage Logic High Leakage Current VOL IOLEAK ISINK = 10mA POWER REQUIREMENTS Supply Voltage Supply Current Power-Supply Noise Immunity VPSNI 0 to 5MHz sinusoid on VCC Note 4 mVP-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 VPSNI. Maxim Integrated MAX7461 Loss-of-Sync Alarm Typical Operating Characteristics VCC = 5V, GND = 0, CIN = 0.1µF, RO = 10kΩ, TA = +25°C, unless otherwise noted. CVSB LOS ALERT TRANSIENT MAX7461 toc01 LOS DETECT TIME vs. SUPPLY VOLTAGE LOS RELEASE TIME vs. SUPPLY VOLTAGE MAX7461 toc03

PDF Datasheet Preview

MAX7461 Loss-of-Sync Alarm

The MAX7461 single-channel loss-of-sync alarm LOS provides composite video sync detection in NTSC, PAL, and SECAM standard-definition television SDTV systems. The MAX7461’s advanced detection circuitry delivers robust performance by preventing false lossof-sync alarms due to noise. The device accepts an AC-coupled composite CVBS , luma Y , or any other video signal with sync, and outputs a logic-level signal. 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.

The MAX7461 is available in a 5-pin SOT23 package and is specified for operation over the -40°C to +85°C temperature range.

Accepts CVBS, Y, or Any Other Video with Sync Loss-of-Sync Alarm Output Robust Performance in Noisy Environments Wire-OR Alarm Output NTSC, PAL, and SECAM Small 5-Pin SOT23 Package

Pin Configuration

TOP VIEW

Security Systems Consumer Electronics
Ordering Information

PART

TEMP RANGE

PINPACKAGE

MAX7461EUK -40°C to +85°C 5 SOT23

PACKAGE CODE

U5-2
5 VCC

MAX7461

GND 2

GND 3
4 LOS

SOT23

Functional Diagram

CIN IN
1 0.1uF 75Ω
+5V 0.1uF

VCC 5

SYNC SLICE LEVEL

CLAMP

GND 3

MAX7461

SYNC

SYNC LOS

DETECTOR

FILTER

RO 1kΩ

LOS 4
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s website at

MAX7461 Loss-of-Sync Alarm

ABSOLUTE MAXIMUM RATINGS

VCC to GND to +6V LOS to +6V IN to GND.................-0.3V to the lower of +6V and VCC + 0.3V Continuous Power Dissipation TA = +70°C
5-Pin SOT23-5 derate 7.1mW/°C above +70°C ......571.0mW Maximum Current Into Any Pin

Operating Temperature Range MAX7461EUK to +85°C

Storage Temperature Range .............................-65°C to +150°C Lead Temperature soldering, 10s .................................+300°C Junction Temperature

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

VCC = +4.5V to +5.5V, GND = 0, CIN = 0.1µF, RO = 500Ω, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.

PARAMETER

CONDITIONS

TYP MAX UNITS

AC CHARACTERISTICS

Minimum Input Sync Height

VIN-MIN AC-coupled Note 1
130 mVP-P

Maximum Input Voltage LOS Release Time LOS Detect Time DIGITAL CHARACTERISTICS

VIN-MAX tRT tDT

AC-coupled Note 2 Note 3

VP-P

Output Low Voltage Logic High Leakage Current

VOL IOLEAK

ISINK = 10mA

POWER REQUIREMENTS

Supply Voltage

Supply Current

Power-Supply Noise Immunity

VPSNI 0 to 5MHz sinusoid on VCC Note 4
mVP-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 VPSNI.

Maxim Integrated

MAX7461 Loss-of-Sync Alarm

Typical Operating Characteristics

VCC = 5V, GND = 0, CIN = 0.1µF, RO = 10kΩ, TA = +25°C, unless otherwise noted.

CVSB LOS ALERT TRANSIENT

MAX7461 toc01

LOS DETECT TIME vs. SUPPLY VOLTAGE

LOS RELEASE TIME vs. SUPPLY VOLTAGE

MAX7461 toc03

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived MAX7461EUK+ Datasheet file may be downloaded here without warranties.

Datasheet ID: MAX7461EUK+ 647405