MAX9546_07 Datasheet, PDF (1/12 Pages) Maxim Integrated Products – Differential Video Interface Chipset

19-3873; Rev 2; 7/07
Differential Video Interface Chipset
General Description
The MAX9546/MAX9547 differential interface chipset
converts single-ended voltages to differential voltages for
transport and then converts back to single-ended volt-
ages. These devices eliminate costly, bulky, single-
ended coaxial cables with inexpensive, readily available,
differential shielded (ScTP) or unshielded (UTP) twisted
pairs. The fault detection of the MAX9546 and loss-of-sig-
nal detection of the MAX9547 allow proactive and
speedy diagnosis, such as identifying failures in the man-
ufacturing stage and troubleshooting equipment at repair
facilities. The MAX9546/MAX9547 are low-cost, conve-
nient solutions for transporting CVBS/FBAS analog video
signals (PAL or NTSC) through hostile environments.
The MAX9546 driver converts the single-ended input into
a differential output with a 6dB fixed gain to drive a back-
terminated, DC-coupled differential video output to unity
gain. This DC connection allows the detection of a short-
circuit condition at the differential outputs. The FAULT
output indicates a short-circuit condition including a short
to a high battery condition (V_BAT = +16V) or ground.
The MAX9547 receiver converts the differential signal
from the MAX9546 into a single-ended signal. Like the
MAX9546 output, the MAX9547 input survives a short to
a high battery condition or ground. The MAX9547 receiv-
er loss-of-signal output (LOS) operates by detecting the
H-Sync and thus can support both monochrome and
color video signals. The MAX9547 gain is set with an
external impedance between ZT+ and ZT-.
The MAX9546/MAX9547 operate from a 7.5V to 10V
single supply. Both devices include ±15kV ESD Human
Body Model (HBM) protection. The MAX9546/MAX9547
are offered in a thermally enhanced 8-pin SO package
and specified over the -40°C to +85°C extended tem-
perature range.
Applications
Automotive Video
Car Navigation
In-Car Entertainment
Collision Avoidance/Rearview Cameras
Security/CCTV Video
Avionics/In-Flight Entertainment
Features
♦ Fault Detection (MAX9546)
♦ Loss-of-Signal Detection (MAX9547)
♦ Tolerate ±2V Ground-Level Shift between Source
and Load
♦ ±15kV ESD Protection (Human Body Model)
♦ ±8kV—IEC 1000-4-2 Contact Discharge
♦ ±15kV—IEC 1000-4-2 Air-Gap Discharge
♦ Preset 6dB Gain (MAX9546)
♦ Variable Receiver Gain (MAX9547)
♦ 7.5V to 10V Single-Supply Operation
Ordering Information
PART
PIN-
PACKAGE
PKG CODE DESCRIPTION
MAX9546ESA+ 8 SO-EP*
MAX9547ESA+ 8 SO-EP*
S8E-14
S8E-14
Driver
Receiver
Note: These devices are specified for -40°C to +85°C temper-
ature range.
+Denotes a lead-free package.
*EP = Exposed paddle.
Pin Configuration appears at end of data sheet.
Typical Operating Circuit
VCC
MAX9546
IN
CLAMP
OUT+
OUT-
FAULT
VCC
ZT+
MAX9547
ZT-
IN+
IOUT
VOUT
IN-
LOS
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.