214x4-DSH-001-D

Mindspeed Technologies

®

March 2010

Mindspeed Proprietary and Confidential

Applications

• SDI Routers

•SDI Switches

• SDI Distribution Amplifier

•SDI Camera

Standards Compliance

• SMPTE 259M, SMPTE 292, SMPTE 344M, SMPTE 424M

(at appropriate data rates)

• DVB-ASI (270 Mbps)

The M21404/M21414/M21424 are high-speed, low-power, adaptive co-axial cable equalizers designed to increase

the maximum low-jitter transmission distance of serial digital interface (SDI) video signals and DVB-ASI across

commonly used bandwidth-limiting 75

Ω coaxial cable. These devices automatically optimize their transfer function

based on the bit rate and cable length to minimize the inter-symbol interference (ISI) jitter caused by the cable and

to remove the DC offset components introduced with the pathological test pattern and AC coupling in systems.

The M21424 is designed to support SD, HD, and 3G data rates from 143 Mbps to 2970 Mbps. The M21414 is

designed to support SD and HD data rates from 143 Mbps and 1485 Mbps. The M21404 is designed to support SD

data rates between 143 Mbps and 540 Mbps.

The low-noise, high-gain equalizer allows for low jitter 3G-SDI transmissions up to 100m (Belden 1694A) and HD

transmissions up to a length of 200m (Belden 1694A) and 120m (Belden 8281). For SD data rates, cable lengths

up to 400m (Belden 1694A) and 300m (Belden 8281) are supported.

Functional Block Diagram

THRESH

CLEN

SDI

SDI

CABLE

LENGTH

INDICATOR

EQUALIZER

CORE

INPUT

BUFFER

0

1

DC

RESTORE

SDO2_EN

SDO2

OUTPUT

BUFFER

SDO2

OUTPUT

BUFFER

SDO1

SDO1

CONTROL

LOGIC

SD/ MUTE

EQ_ BYP

M21404 /M21414/M21424

Cable Equalizer

SWING_L/H

Features

• SMPTE/DVB-ASI compliant at SD, HD and 3G (M21424)

• SMPTE/DVB-ASI compliant at SD and HD (M21414)

• SMPTE/DVB-ASI compliant at SD (M21404)

• Dual CML outputs, with selectable high amplitude

• Enable for second CML output

• Interchangeable PCB footprint for all three devices

• 2.5V or 3.3V Supply

• Low Power (175 mW @ 2.5V, 230 mW @ 3.3V)

• Extended Temperature range: –10 to 85 °C

M21404/M21414/M21424 SD, HD, and 3G Cable Equalizers