m21245 Mindspeed Technologies, m21245 Datasheet

m21245

Manufacturer Part Number

m21245

Description

M21245 3g/hd/sd-sdi Multirate Low Power Video Reclocker

Manufacturer

Mindspeed Technologies

Datasheet

1.M21245.pdf (2 pages)

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Manufacturer

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Company:

Meier Automation Equipment Co., Limited

Part Number:

m21245G-14

Manufacturer:

MINDSPEED

Quantity:

20 000

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The M21245 is a serial digital video reclocker with integrated trace equalization, automatic rate detect (ARD) circuitry,

and a 4:1 mux at the input. It operates at SDI data rates ranging from 270 Mbps to 2970 Mbps and is compliant to

SMPTE 424M, SMPTE292M, and SMPTE 259M-C. At 270 Mbps, it also supports DVB-ASI.

The M21245 has an input jitter tolerance (IJT) of greater than 0.6 unit intervals (UI) and can provide retimed serial out-

puts with very low output jitter. The reclocker requires a single, external, 27 MHz crystal, which is used as the reference

clock for all four channels. It includes per lane analog input equalization for up to 40” of FR4 trace and two connectors

in addition to output de-emphasis.

This device features integrated supply regulators, allowing it to be powered from 1.2V, 1.8V, 2.5V, or 3.3V supply volt-

ages. When operating at 1.2V, it consumes only 230 mW at 3G-SDI. Furthermore, the power rails for the core, input, and

output circuitry are electrically independent and as such may be connected to different voltage rails on the board. This

feature enables the M21245 to be DC coupled to any upstream or downstream device regardless of its input/output

voltage level.

The 4:1 mux at the input allows any of the 4 inputs to be routed to the integrated reclocker and its output. The

device, and the input mux, may be configured by setting the internal registers though standard two-wire and four-

wire interfaces. Optionally, the reclocker may be configured at power-up through an external EEPROM device. Limited

configuration is also possible through hardware pin settings.

The M21245 is offered in a green and RoHS compliant, 6 mm x 6 mm, 40-pin QFN package.

Product Overview

SMPTE 259-C, 292M, 424M, and DVB ASI compliant

0.6UI Input jitter tolerance

Integrated 50Ω input termination

4:1 Input multiplexer

Input equalization 40” of FR4 trace and 2 connectors

Output de-emphasis

230mW power consumption per channel (1.2V operation)

Integrated regulators extends operation from 1.2 to 3.3V

Electrically isolated input, output, and core supply rails

Mute and configurable auto or manual bypass mode

Automatic and manual modes for rate indication and selection Ease of use and flexibility

Loss of Lock (LOL), Loss of Signal (LOS) and data rate indica-

tion

I²C, SPI and I²C EEPROM interface

Industrial operating temperature range ( -40°C to +85°C)

M21245

3G/HD/SD-SDI Multirate Low Power Video Reclocker

Features

Standard compliant solution

Enable robust, error free designs

Save board area and enable high density designs

Saves board area and enables high density designs

Ease of high speed design and layout

Enables low power designs with minimal heat dissipation

Reduces number of power rails required on a board

DC interface – saves board area and cost

Allows use with non-standard rates

Ease of status update and diagnostics

Flexibility and ease of control and configuration

Provides higher tolerance and additional design margin

Benefits

Related parts for m21245

m21245 Summary of contents

Page 1

... SMPTE 424M, SMPTE292M, and SMPTE 259M-C. At 270 Mbps, it also supports DVB-ASI. The M21245 has an input jitter tolerance (IJT) of greater than 0.6 unit intervals (UI) and can provide retimed serial out- puts with very low output jitter. The reclocker requires a single, external, 27 MHz crystal, which is used as the reference clock for all four channels. It includes per lane analog input equalization for up to 40” ...

Page 2

... Reclocker Mux Fig Functional Block Diagram Equalizer Fig Typical Routing Switcher Application Diagram For more product information, please visit SDO0P 50Ω Buffer SDO0N W/ DE SCLKP/SDO1P 50Ω Buffer SCLKN/SDO1N W/ DE Cable Driver Crosspoint Reclocker M21245 Backplane www.mindspeed.com ...

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