MAX7461EUK+T

General Description
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 loss-
of-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.
Applications
Security Systems
Consumer Electronics
Features
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
Loss-of-Sync Alarm
MAX7461
For pricing, delivery, and ordering information, please contact Maxim Direct at
1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.
19-0553; Rev 1; 4/13
Ordering Information
PART TEMP RANGE
PIN-
PACKAGE
PACKAGE
CODE
MAX7461EUK -40°C to +85°C 5 SOT23 U5-2
GND
LOSGND
15V
CC
IN
MAX7461
SOT23
TOP VIEW
2
34
Pin Configuration
CLAMP
LPF
SYNC
DETECTOR
GND
LOS
75Ω
+5V
0.1μF
V
CC
SYNC
SLICE
LEVEL
LOS
FILTER
V
CC
0.1μF
1kΩ
1
5
3
4
SYNC
C
IN
IN
RO
MAX7461
Functional Diagram
Loss-of-Sync Alarm
2 Maxim Integrated
MAX7461
ABSOLUTE MAXIMUM RATINGS
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.
V
CC
to GND..............................................................-0.3V to +6V
LOS to GND..............................................................-0.3V to +6V
IN to GND.................-0.3V to the lower of +6V and (V
CC
+ 0.3V)
Continuous Power Dissipation (T
A
= +70°C)
5-Pin SOT23-5 (derate 7.1mW/°C above +70°C) ......571.0mW
Maximum Current Into Any Pin .........................................±50mA
Operating Temperature Range
MAX7461EUK ...................................................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Junction Temperature......................................................+150°C
ELECTRICAL CHARACTERISTICS
(V
CC
= +4.5V to +5.5V, GND = 0, C
IN
= 0.1µF, RO = 500Ω, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
=
+25°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
AC CHARACTERISTICS
Minimum Input Sync Height V
IN-MIN
AC-coupled (Note 1) 105 130 mV
P-P
Maximum Input Voltage V
IN-MAX
AC-coupled 2.4 V
P-P
LOS Release Time t
RT
(Note 2) 1.7 2.2 2.7
LOS Detect Time t
DT
(Note 3) 1.9 3.4 4.9
ms
DIGITAL CHARACTERISTICS
Output Low Voltage V
OL
I
SINK
= 10mA 0.4 V
Logic High Leakage Current I
OLEAK
A
POWER REQUIREMENTS
Supply Voltage V
CC
4.5 5.0 5.5 V
Supply Current I
CC
1.7 2.2 mA
Power-Supply Noise Immunity V
PSNI
0 to 5MHz sinusoid on V
CC
(Note 4) 200 mV
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
.
Loss-of-Sync Alarm
IN
500mV/div
t = 10ms/div
CVSB LOS ALERT TRANSIENT
MAX7461 toc01
LOS
5V/div
3.0
2.5
2.0
1.5
1.0
4.5 4.94.7 5.1 5.3 5.5
LOS DETECT TIME
vs. SUPPLY VOLTAGE
MAX7461 toc02
SUPPLY VOLTAGE (V)
TIME (ms)
4.0
3.5
3.0
2.5
2.0
4.5 4.94.7 5.1 5.3 5.5
LOS RELEASE TIME
vs. SUPPLY VOLTAGE
MAX7461 toc03
SUPPLY VOLTAGE (V)
TIME (ms)
0.20
0.15
0.10
0.05
0
4.5 4.94.7 5.1 5.3 5.5
SYNC HEIGHT LOS ALERT THRESHOLD
vs. SUPPLY VOLTAGE
MAX7461 toc04
SUPPLY VOLTAGE (V)
SYNC HEIGHT (V)
1.6
1.8
1.7
1.9
2.0
-40 0-20 20 40 60 80
SUPPLY CURRENT
vs. TEMPERATURE (CVBS INPUT)
MAX7461 toc05
TEMPERATURE (°C)
I
CC
(mA)
Typical Operating Characteristics
(V
CC
= 5V, GND = 0, C
IN
= 0.1µF, RO = 10kΩ, T
A
= +25°C, unless otherwise noted.)
Maxim Integrated 3
MAX7461

MAX7461EUK+T

Mfr. #:
Manufacturer:
Maxim Integrated
Description:
Video ICs Loss-Of-Sync Alarm
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
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