lmh0056sq National Semiconductor Corporation, lmh0056sq Datasheet

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lmh0056sq

Manufacturer Part Number
lmh0056sq
Description
Hd/sd Sdi Reclocker With 4 1 Input Multiplexer
Manufacturer
National Semiconductor Corporation
Datasheet
© 2006 National Semiconductor Corporation
LMH0056
HD/SD SDI Reclocker with 4:1 Input Multiplexer
General Description
The LMH0056 HD/SD SDI Reclocker with 4:1 Input Multi-
plexer is a monolithic integrated circuit that retimes bit-serial
digital video data conforming to the SMPTE 259M (A & C)
and SMPTE 292M standards. The LMH0056 operates at
serial data rates of 143 Mbps, 270 Mbps, 1.483 Gbps and
1.485 Gbps. The LMH0056 supports DVB-ASI operation at
270 Mbps. The LMH0056 includes an integrated 4:1 input
multiplexer for selecting one of four input data streams for
retiming.
The LMH0056 automatically detects the incoming data rate
and adjusts itself to retime the incoming data to suppress
accumulated jitter. The LMH0056 recovers the serial data-
rate clock and optionally provides it as an output. The
LMH0056 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 by-
pass and output mute. The serial data inputs, outputs, and
serial data-rate clock outputs are differential LVPECL com-
patible. The CML serial data and serial data-rate clock out-
puts are suitable for driving 100Ω differentially terminated
networks. The control logic inputs and outputs are LVCMOS
compatible.
The LMH0056 is powered from a single 3.3V supply. Power
dissipation is typically 350 mW. The device is housed in a
48-pin LLP package.
Typical Application
DS202019
Features
n Supports SMPTE 259M (A & C) and SMPTE 292M
n Supports 143 Mbps, 270 Mbps, 1.483 Gbps, and 1.485
n Supports DVB-ASI at 270 Mbps
n Single 3.3V supply operation
n 350 mW typical power consumption
n Integrated 4:1 multiplexed input
n Two differential, reclocked outputs
n Choice of second reclocked output or low-jitter,
n Single 27 MHz external crystal or reference clock input
n Manual rate select input
n SD/HD operating rate indicator output
n Lock Detect indicator output
n Output mute function for data and clock
n Auto/Manual reclocker bypass
n Differential LVPECL compatible serial data inputs and
n LVCMOS control inputs and indicator outputs
n 48-Pin LLP package
n Industrial temperature range: -40˚C to +85˚C
Applications
n SDTV/HDTV serial digital video interfaces for:
serial digital video standards
Gbps serial data rate operation
differential, data-rate clock output
outputs
— Digital video routers and switchers
— Digital video processing and editing equipment
— DVB-ASI equipment
— Video standards and format converters
PRELIMINARY
20201901
www.national.com
August 2006

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lmh0056sq Summary of contents

Page 1

... The LMH0056 is powered from a single 3.3V supply. Power dissipation is typically 350 mW. The device is housed in a 48-pin LLP package. Typical Application © 2006 National Semiconductor Corporation Features n Supports SMPTE 259M (A & C) and SMPTE 292M serial digital video standards n Supports 143 Mbps, 270 Mbps, 1.483 Gbps, and 1.485 ...

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Block Diagram www.national.com 2 20201903 ...

Page 3

... 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. 48-Pin LLP Order Number LMH0056SQ See NS Package Number SQA-48C 3 20201902 www.national.com ...

Page 4

Pin Descriptions Pin Name 1 SDI0 2 SDI0 SDI1 5 SDI1 SDI2 8 SDI2 SDI3 11 SDI3 BYPASS/AUTO ...

Page 5

Absolute Maximum Ratings 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 specifi- cations. Supply Voltage (V –V ...

Page 6

AC Electrical Characteristics Over Supply Voltage and Operating Temperature ranges, unless otherwise specified. (Note 3) 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 ...

Page 7

AC Electrical Characteristics Over Supply Voltage and Operating Temperature ranges, unless otherwise specified. (Note 3) Symbol Parameter F Reference Clock REF Frequency F Ref. Clock Freq. −10˚C to +60˚C TOL Tolerance V Power Supply Ramp RAMP Rate Note 1: “Absolute ...

Page 8

Device Description The LMH0056 HD/SD SDI Reclocker with 4:1 Input Multi- plexer is used in many types of digital video signal process- ing equipment. Supported serial digital video standards are SMPTE 259M A & C and SMPTE 292M. Corresponding serial ...

Page 9

Control Inputs and Indicator Outputs (Continued) SERIAL DATA INPUT SELECTOR The Serial Data Input Selector (SEL [1:0]) allows the user to select the active input channel. Table 2 shows the input selected for a given state of SEL [1:0]. TABLE ...

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Control Inputs and Indicator Outputs (Continued) SD/HD The SD/HD output indicates whether the LMH0056 is pro- cessing data rates. It may be used to control another device such as the LMH0002 cable driver. When this output is ...

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Control Inputs and Indicator Outputs (Continued) 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 ...

Page 12

Application Information Figure 2 shows an application circuit for the LMH0056 along with the LMH0044 SMPTE 292M / 259M Adaptive Cable Equalizers and LMH0202 SMPTE 292M / 259M Dual Cable Driver. www.national.com FIGURE 2. Application Circuit 12 20201904 ...

Page 13

... Deutsch Tel: +49 (0) 69 9508 6208 English www.national.com Français Tel: +33 ( 8790 48-Pin LLP Order Number LMH0056SQ NS Package Number SQA-48C 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system affect its safety or effectiveness ...

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