LMH0346SQE/NOPB National Semiconductor, LMH0346SQE/NOPB Datasheet

IC RECLOCKER HD/SD SDI 24LLP

LMH0346SQE/NOPB

Manufacturer Part Number
LMH0346SQE/NOPB
Description
IC RECLOCKER HD/SD SDI 24LLP
Manufacturer
National Semiconductor
Type
Reclockerr
Datasheet

Specifications of LMH0346SQE/NOPB

Applications
SDTV/HDTV
Mounting Type
Surface Mount
Package / Case
24-LLP
Operating Temperature (min)
-40C
Operating Temperature Classification
Industrial
Operating Temperature (max)
85C
Package Type
LLP EP
Rad Hardened
No
For Use With
SD3GDAEVK - BOARD EVAL LMH0346SD346EVK - BOARD EVAL LMH0346
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
LMH0346SQE/NOPBTR

Available stocks

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Part Number
Manufacturer
Quantity
Price
Part Number:
LMH0346SQE/NOPB
Manufacturer:
NS
Quantity:
17
© 2009 National Semiconductor Corporation
3 Gbps HD/SD SDI Reclocker with Dual Differential Outputs
General Description
The LMH0346 3 Gbps HD/SD SDI Reclocker retimes serial
digital video data conforming to the SMPTE 424M, SMPTE
292M, and SMPTE 259M (C) standards. The LMH0346 op-
erates at serial data rates of 270 Mbps, 1.483 Gbps, 1.485
Gbps, 2.967 Gbps, and 2.97 Gbps. The LMH0346 supports
DVB-ASI operation at 270 Mbps.
The LMH0346 automatically detects the incoming data rate
and adjusts itself to retime the incoming data to suppress ac-
cumulated jitter. The LMH0346 recovers the serial data-rate
clock and optionally provides it as an output. The LMH0346
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, manual rate select input, SD/HD rate indicator output,
lock detect output, auto/manual data bypass and output mute.
The serial data inputs, outputs, and serial clock outputs are
differential LVPECL compatible. The CML serial data and se-
rial clock outputs are suitable for driving 100Ω differentially
terminated networks. The control logic inputs and outputs are
LVCMOS compatible.
The LMH0346 is powered from a single 3.3V supply. Power
dissipation is typically 370 mW.
The device is available in two space–saving packages: a 6.5
X 4.4 mm 20-pin e-TSSOP and an even more space–efficient
5 X 4 mm 24-pin LLP package.
Typical Application
202150
LMH0346
Features
Applications
Supports SMPTE 424M, SMPTE 292M, and SMPTE
259M (C) serial digital video standards
Supports 270 Mbps, 1.483 Gbps, 1.485 Gbps, 2.967
Gbps, and 2.97 Gbps serial data rate operation
Supports DVB-ASI at 270 Mbps
Single 3.3V supply operation
370 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
Manual or automatic rate select input
SD/HD operating rate indicator output
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 or 24-pin LLP package
Industrial temperature range: -40°C to +85°C
Footprint compatible with the LMH0046
andLMH0026 (e-TSSOP package)
SDTV/HDTV and 3 Gbps serial digital video interfaces for:
— Digital video routers and switchers
— Digital video processing and editing equipment
— DVB-ASI equipment
— Video standards and format converters
November 9, 2009
20215001
www.national.com

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LMH0346SQE/NOPB Summary of contents

Page 1

... The device is available in two space–saving packages: a 6.5 X 4.4 mm 20-pin e-TSSOP and an even more space–efficient 24-pin LLP package. Typical Application © 2009 National Semiconductor Corporation LMH0346 Features ■ Supports SMPTE 424M, SMPTE 292M, and SMPTE 259M (C) serial digital video standards ■ ...

Page 2

Block Diagram Connection Diagrams 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 20215002 20-Pin e-TSSOP Order Number LMH0346MH See NS Package Number MXA20A 2 ...

Page 3

The exposed die attach pad is the primary negative electrical terminal for this device. It must be connected to the negative power supply voltage. 24-Pin LLP Order Number LMH0346SQ See NS Package Number SQA24B 3 20215006 www.national.com ...

Page 4

Pin Descriptions e-TSSOP LLP Name Pin Pin 1 24 LF1 2 1 LF2 3 2 RATE RATE SDI 6 5 SDI BYPASS/AUTO BYPASS 9 8 OUTPUT MUTE 10 ...

Page 5

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 6

AC Electrical Characteristics Over Supply Voltage and Operating Temperature ranges, unless otherwise specified. Symbol Parameter BR Serial Data Rate SD BR Serial Data Rate SD BR Serial Data Rate SD TOL Serial Input Jitter JIT Tolerance TOL Serial Input Jitter ...

Page 7

Symbol Parameter Input rise/fall time 20%–80%, 270 Mbps (Note Input rise/fall time 20%–80%, 1483 or 1485 r f Mbps Input rise/fall time 20%–80%, 2967 or 2970 r f Mbps, ...

Page 8

Device Description The LMH0346 3 Gbps HD/SD SDI Reclocker is used in many types of digital video signal processing equipment. Supported serial digital video standards are SMPTE 259M (C), SMPTE 292M, and SMPTE 424M. Corresponding serial data rates are 270 ...

Page 9

FIGURE 2. Equivalent SDO Output Circuit (SDO, SDO, SCO/SDO2, SCO/SDO2) OPERATING SERIAL DATA RATES This device operates at serial data rates of 270 Mbps, 1483 Mbps, 1485 Mbps, 2967 Mbps, and 2970 Mbps. The device does not lock to harmonics ...

Page 10

LOCK DETECT OUTPUT MUTE LOCK DETECT 1 LOCK DETECT SD/HD The SD/HD output indicates whether the LMH0346 is pro- cessing Gbps data rates. It may be used to ...

Page 11

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

Page 12

Application Information Figure 4 shows an application circuit for the LMH0346 along with the LMH0344 3 Gbps HD/SD SDI Adaptive Cable Equal- izer and LMH0302 3 Gbps HD/SD SDI Cable Driver. The LMH0346 inputs are LVPECL compatible. The LMH0346 has ...

Page 13

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 LMH0346 and LMH0302 cable driver. All that is ...

Page 14

Physical Dimensions www.national.com inches (millimeters) unless otherwise noted 20-Pin e-TSSOP Order Number LMH0346MH NS Package Number MXA20A 24-Pin LLP Order Number LMH0346SQ NS Package Number SQA24B 14 ...

Page 15

Notes 15 www.national.com ...

Page 16

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