This product is being discontinued and is subject to Last Time Buy, after which new orders can not be placed. See Ordering Information for recommended replacements.
MAX9547
This product is No Longer Available. See Ordering Information for recommended replacements.
The MAX9546/MAX9547 differential interface chipset
converts single-ended voltages to differential voltages for
transport and then converts back to single-ended voltages.
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-signal
detection of the MAX9547 allow proactive and
speedy diagnosis, such as identifying failures in the manufacturing
stage and troubleshooting equipment at repair
facilities. The MAX9546/MAX9547 are low-cost, convenient
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 active-low FAULT
output indicates a short-circuit condition including a short
to a high battery condition (VBAT = +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 receiver
loss-of-signal output (active-low 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 temperature
range.
Key Features
Applications/Uses
Fault Detection (MAX9546)
Loss-of-Signal Detection (MAX9547)
Tolerate ±2V Ground-Level Shift between Source and Load
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