MAX9546 データシートの表示（PDF） - Maxim Integrated

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MAX9546

Differential Video Interface Chipset

Maxim Integrated 

MAX9546/MAX9547

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, differ-

ential 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 manufactur-

ing stage and troubleshooting equipment at repair facili-

ties. The MAX9546/MAX9547 are low-cost, convenient

solutions for transporting CVBS/FBAS analog video sig-

nals (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 (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 (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 tempera-

ture range.

Applications

●● 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*

S8E-14 Driver

MAX9547ESA+ 8 SO-EP*

S8E-14 Receiver

Note: These devices are specified for -40°C to +85°C tempera-

ture 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

19-3873; Rev 4; 9/14

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