DS15BR400EVK National Semiconductor, DS15BR400EVK Datasheet

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DS15BR400EVK

Manufacturer Part Number
DS15BR400EVK
Description
Manufacturer
National Semiconductor
Datasheet
1.DS15BR400EVK.pdf (14 pages)

Specifications of DS15BR400EVK

Lead Free Status / Rohs Status
Supplier Unconfirmed
© 2007 National Semiconductor Corporation
DS15BR400/DS15BR401
4-Channel LVDS Buffer/Repeater with Pre-Emphasis
General Description
The DS15BR400/DS15BR401 are four channel LVDS buffer/
repeaters capable of datarates of up to 2 Gbps. High speed
data paths and flow-through pinout minimize internal device
jitter and simplify board layout, while pre-emphasis over-
comes ISI jitter effects from lossy backplanes and cables. The
differential inputs interface to LVDS, and Bus LVDS signals
such as those on National's 10-, 16-, and 18- bit Bus LVDS
SerDes, as well as CML and LVPECL. The differential inputs
and outputs of the DS15BR400 are internally terminated with
100Ω resistors to improve performance and minimize board
space. The DS15BR401 does not have input termination re-
sistors. The repeater function is especially useful for boosting
signals for longer distance transmission over lossy cables and
backplanes.
The DS15BR400/DS15BR401 are powered from a single
3.3V supply and consume 578 mW (typ). They operate over
the full -40°C to +85°C industrial temperature range and are
available in space saving LLP-32 and TQFP-48 packages.
Typical Application
201889
Features
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Applications
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DC to 2 Gbps low jitter, high noise immunity, low power
operation
6 dB of pre-emphasis drives lossy backplanes and cables
LVDS/CML/LVPECL compatible input, LVDS output
On-chip 100 Ω output termination, optional 100 Ω input
termination
15 kV ESD protection on LVDS inputs and outputs
Single 3.3V supply
Industrial -40 to +85°C temperature range
Space saving LLP-32 or TQFP-48 packages
Evaluation Kit Available
Cable extention applications
Signal repeating and buffering
Digital routers
20188950
www.national.com
May 2007

DS15BR400EVK Summary of contents

Page 1

... They operate over the full -40°C to +85°C industrial temperature range and are available in space saving LLP-32 and TQFP-48 packages. Typical Application © 2007 National Semiconductor Corporation Features ■ Gbps low jitter, high noise immunity, low power operation ■ ...

Page 2

Block and Connection Diagrams DS15BR400 Block Diagram TQFP Pinout - Top View www.national.com 20188901 20188902 2 20188903 DS15BR401 Block Diagram 20188912 LLP Pinout - Top View ...

Page 3

Pin Descriptions Pin TQFP Pin LLP Pin Name Number Number DIFFERENTIAL INPUTS IN0 IN0− IN1 IN1− IN2 IN2− IN3 IN3− DIFFERENTIAL OUTPUTS OUT0+ 48 ...

Page 4

Absolute Maximum Ratings Supply Voltage ( CMOS Input Voltage LVDS Receiver Input Voltage LVDS Driver Output Voltage LVDS Output Short Circuit Current Junction Temperature Storage Temperature Lead Temperature (Solder, 4sec) Max Pkg Power Capacity @ 25°C TQFP LLP ...

Page 5

Symbol Parameter LVDS OUTPUT DC SPECIFICATIONS (OUTn±) V Differential Output Voltage Pre-emphasis (Note 6) ΔV Change in V between OD OD Complementary States V Offset Voltage (Note 7) OS ΔV Change in V between OS OS Complementary States ...

Page 6

DC Test Circuits AC Test Circuits and Timing Diagrams www.national.com FIGURE 1. Differential Driver DC Test Circuit FIGURE 2. Differential Driver AC Test Circuit FIGURE 3. Propagation Delay Timing Diagram FIGURE 4. LVDS Output Transition Times 6 20188925 20188926 20188927 ...

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FIGURE 5. Enable/Disable Time Test Circuit FIGURE 6. Enable/Disable Time Diagram 7 20188929 20188930 www.national.com ...

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Application Information INTERNAL TERMINATIONS The DS15BR400 has integrated termination resistors on both the input and outputs. The inputs have a 100Ω resistor across the differential pair, placing the receiver termination as close as possible to the input stage of the ...

Page 9

INPUT INTERFACING The DS15BR400 and DS15BR401 accept differential signals and allow simple coupling. With a wide common mode range, the DS15BR400 and DS15BR401 can be DC-coupled with all common differential drivers (i.e. LVPECL, LVDS, CML). The following ...

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OUTPUT INTERFACING The DS15BR400 and DS15BR401 output signals that are compliant to the LVDS standard. Their outputs can be DC-coupled to most common differential receivers. The following figure illustrates typical DC-coupled interface to common differential receivers and assumes that the ...

Page 11

... Data Rate vs. Cable Length (0.5 UI Criteria) 20188921 Data presented in this graph was collected using the DS15BR400EVK, a pair of RJ-45 to SMA adapter boards and various length Belden 1700a cables. The maximum data rate was determined based on total jitter (0.5 UI criteria) measured after the cable ...

Page 12

Physical Dimensions Order Number DS15BR400TVS, DS15BR401TVS (250 piece Tray) Order Number DS15BR400TVSX, DS15BR401TVSX (1000 piece Tape and Reel) (See AN-1187 for PCB Design and Assembly Recommendations) Order Number DS15BR400TSQ, DS15BR401TSQ (1000 piece Tape and Reel) DS15BR400TSQX, DS15BR401TSQX (4500 piece Tape ...

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13 www.national.com ...

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... National Semiconductor and the National Semiconductor logo are registered trademarks of National Semiconductor Corporation. All other brand or product names may be trademarks or registered trademarks of their respective holders. ...