LMH0026MH/NOPB National Semiconductor, LMH0026MH/NOPB Datasheet

IC RECLOCKER SDI HD/SD 20-TSSOP

LMH0026MH/NOPB

Manufacturer Part Number
LMH0026MH/NOPB
Description
IC RECLOCKER SDI HD/SD 20-TSSOP
Manufacturer
National Semiconductor
Type
Reclockerr
Datasheet

Specifications of LMH0026MH/NOPB

Applications
Digital Video
Mounting Type
Surface Mount
Package / Case
20-TSSOP Exposed Pad, 20-eTSSOP, 20-HTSSOP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
LMH0026MH

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Part Number:
LMH0026MH/NOPB
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© 2009 National Semiconductor Corporation
SD SDI Reclocker with Dual Differential Outputs
General Description
The LMH0026 SD SDI Reclocker retimes serial digital video
data conforming to the SMPTE 259M (C) standard. The
LMH0026 operates at the serial data rate of 270 Mbps and
also supports DVB-ASI operation at 270 Mbps.
The LMH0026 retimes the incoming data to suppress accu-
mulated jitter. The LMH0026 recovers the serial data-rate
clock and optionally provides it as an output. The LMH0026
has two differential serial data outputs; the second output may
be selected as a low-jitter, data-rate clock output. Controls
and indicators are: serial clock or second serial data output
select, SD indicator output, lock detect output, auto/manual
data bypass, and output mute. The serial data inputs, outputs,
and serial data-rate clock outputs are differential LVPECL
compatible. The CML serial data and serial data-rate clock
outputs are suitable for driving 100Ω differentially terminated
networks. The control logic inputs and outputs are LVCMOS
compatible.
The LMH0026 is powered from a single 3.3V supply. Power
dissipation is typically 330 mW. The device is housed in a 20-
pin e-TSSOP package.
Typical Application
300018
LMH0026
Features
Applications
Supports SMPTE 259M (C) serial digital video standard
Supports 270 Mbps serial data rate operation
Supports DVB-ASI at 270 Mbps
Single 3.3V supply operation
330 mW typical power consumption
Two differential, reclocked outputs
Choice of second reclocked output or low-jitter,
differential, data-rate clock output
Single 27 MHz external crystal or reference clock input
Lock Detect indicator output
Output mute function for data and clock
Auto/Manual reclocker bypass
Differential LVPECL compatible serial data inputs and
outputs
LVCMOS control inputs and indicator outputs
20-Pin e-TSSOP package
Industrial temperature range: -40°C to +85°C
Footprint compatible with the LMH0046 and LMH0346
SDTV serial digital video interfaces for:
— Digital video routers and switchers
— Digital video processing and editing equipment
— DVB-ASI equipment
— Video standards and format converters
October 6, 2009
www.national.com
30001801

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LMH0026MH/NOPB Summary of contents

Page 1

... The control logic inputs and outputs are LVCMOS compatible. The LMH0026 is powered from a single 3.3V supply. Power dissipation is typically 330 mW. The device is housed in a 20- pin e-TSSOP package. Typical Application © 2009 National Semiconductor Corporation LMH0026 Features ■ Supports SMPTE 259M (C) serial digital video standard ■ ...

Page 2

Block Diagram Connection Diagram The exposed die attach pad is the negative electrical terminal for this device. It must be connected to the negative power supply voltage. www.national.com 30001802 20-Pin e-TSSOP Order Number LMH0026MH See NS Package Number MXA20A 2 ...

Page 3

Pin Descriptions Pin Name 1 LF1 2 LF2 RSVD 5 SDI 6 SDI BYPASS/AUTO BYPASS 9 OUTPUT MUTE 10 XTAL IN/EXT CLK 11 XTAL OUT 12 LOCK DETECT 13 SCO/SDO2 14 SCO/SDO2 V ...

Page 4

Absolute Maximum Ratings It is anticipated that this device will not be offered in a military qualified version. If Military/Aerospace specified devices are required, please contact the National Semicon- ductor Sales Office/Distributors for availability and specifica- tions. Supply Voltage (V ...

Page 5

AC Electrical Characteristics Over Supply Voltage and Operating Temperature ranges, unless otherwise specified. Symbol Parameter BR Serial Data Rate SMPTE 259M-C SD TOL Serial Input Jitter 270 Mbps, JIT Tolerance (Note TOL Serial Input Jitter 270 Mbps, JIT Tolerance (Note ...

Page 6

Device Description The LMH0026 SD SDI Reclocker is used in many types of digital video signal processing equipment. The LMH0026 supports the SMPTE 259M (C) serial digital video standard, with a corresponding serial data rate of 270 Mbps. DVB-ASI data ...

Page 7

FIGURE 2. Equivalent SDO Output Circuit (SDO, SDO, SCO/SDO2, SCO/SDO2) SERIAL DATA CLOCK/SERIAL DATA 2 OUTPUT The Serial Data Clock/Serial Data 2 Output is controlled by the SCO_EN input and provides either a second retimed se- rial data output or ...

Page 8

SCO_EN Input SCO_EN enables the SCO/SDO2 differential output to function either as a serial data-rate clock or second serial data output. SCO/SDO2 functions as a serial data-rate clock when SCO_EN is high. This pin has an internal pull-down device. The ...

Page 9

Application Information Figure 4 shows an application circuit for the LMH0026 along with the LMH0074 SMPTE 259M / 344M Adaptive Cable Equalizer and LMH0001 SMPTE 259M / 344M Cable Driver. The LMH0026 inputs are LVPECL compatible. The LMH0026 has a ...

Page 10

DC coupled to the input of the receiving device as long as the common mode ranges of both devices are compatible. 4 shows an example coupled interface between the LMH0026 and LMH0001 cable driver. All that is ...

Page 11

Physical Dimensions inches (millimeters) unless otherwise noted 20-Pin TSSOP Order Number LMH0026MH NS Package Number MXA20A 11 www.national.com ...

Page 12

... For more National Semiconductor product information and proven design tools, visit the following Web sites at: Products Amplifiers www.national.com/amplifiers Audio www.national.com/audio Clock and Timing www.national.com/timing Data Converters www.national.com/adc Interface www.national.com/interface LVDS www.national.com/lvds Power Management www.national.com/power Switching Regulators www.national.com/switchers LDOs www.national.com/ldo LED Lighting www ...

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