Rainbow Electronics MAX7461 - Manual

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
Automotive Rear Seat Entertainment (RSE)
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
MAX7461
Loss-of-Sync Alarm
________________________________________________________________ Maxim Integrated Products 1
19-0553; Rev 0; 5/06
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
Ordering Information
PART TEMP RANGE
PIN-
PACKAGE PACKAGE
CODE
MAX7461EUK -40°C to +85°C 5 SOT23-5 U5-2
GND
LOS GND
1 5 V CC IN
MAX7461
SOT23-5
TOP VIEW
2
3 4
Pin Configuration
CLAMP LPF
SYNC
DETECTOR
GND
LOS
75 Ω
+5V
0.1 µF
V CC
SYNC
SLICE
LEVEL
LOS
FILTER
V CC
0.1 µF
1k Ω
1
5
3
4
SYNC
C IN
IN
RO
MAX7461
Functional Diagram