Rainbow-electronics DS92001 Bedienungsanleitung PDF herunterladen

DS92001

3.3V B/LVDS-BLVDS Buffer

General Description

The DS92001 B/LVDS-BLVDS Buffer takes a BLVDS input

signal and provides an BLVDS output signal. In many large

systems, signals are distributed across backplanes, and one

of the limiting factors for system speed is the ’stub length’ or

the distance between the transmission line and the untermi-

nated receivers on individual cards. Although it is generally

recognized that this distance should be as short as possible

to maximize system performance, real-world packaging con-

cerns often make it difficult to make the stubs as short as the

designer would like.

The DS92001 has edge transitions optimized for multidrop

backplanes where the switching frequency is in the 200 MHz

range or less. The output edge rate is critical in some sys-

tems where long stubs may be present, and utilizing a slow

transition allows for longer stub lengths.

The DS92001, available in the LLP (Leadless Leadframe

Package) package, will allow the receiver inputs to be placed

very close to the main transmission line, thus improving

system performance.

A wide input dynamic range allows the DS92001 to receive

differential signals from LVPECL as well as LVDS sources.

This will allow the device to also fill the role of an LVPECL-

BLVDS translator.

The LOS pin detects a non-driven B/LVDS bus state at the

input and provides an active LOW output. The LOS pin can

be tied to the device’s output enable pin (EN) to generate a

TRI-STATE output state when the input is un-driven. The

LOS pin can also be used locally to inform the system of the

bus state.

Features

n Single +3.3 V Supply

n B/LVDS receiver inputs accept LVPECL signals

n TRI-STATE outputs

n Loss of Signal (LOS) pin detects a non-driven bus

n Receiver input threshold

100 mV

n Fast propagation delay of 1.4 ns (typ)

n Low jitter 400 Mbps fully differential data path

n Compatible with BLVDS 10-bit SerDes (40MHz)

n Compatible with ANSI/TIA/EIA-644-A LVDS standard

n Available in SOIC and space saving LLP package

n Industrial Temperature Range

Connection and Block Diagrams

SOIC - Top View

20024705

LLP - Top View

20024743

DAP (GND) Pad Not Shown

20024702

Functional Operation

BLVDS Inputs BLVDS Outputs

[IN+] − [IN−] OUT+ OUT−

VID ≥ 0.1V H L

VID ≤ −0.1V L H

Full Fail-safe

OPEN/SHORTor Terminated

Ordering Information

Order Number NS Pkg. No. Pkg. Type

DS92001TM M08A SOIC

DS92001TLD LDA08A LLP

June 2002

DS92001 3.3V B/LVDS-BLVDS Buffer

1 2 3 4 5 6 ... 11 12

Inhaltsverzeichnis

Seite 1 - 3.3V B/LVDS-BLVDS Buffer

DS920013.3V B/LVDS-BLVDS BufferGeneral DescriptionThe DS92001 B/LVDS-BLVDS Buffer takes a BLVDS inputsignal and provides an BLVDS output signal. In ma

Seite 2 - Electrical Characteristics

Application Information (Continued)Avoid 90˚ turns (these cause impedance discontinuities).Use arcs or 45˚ bevels.Within a pair of traces, the distanc

Seite 3 - AC Electrical Characteristics

Physical Dimensions inches (millimeters)unless otherwise notedOrder Number DS92001TMSee NS Package Number M08AOrder Number DS92001TLDSee NS Package Nu

Seite 4

NotesLIFE SUPPORT POLICYNATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORTDEVICES OR SYSTEMS WITHOUT THE EXPRESS WR

Seite 5 - DC Test Circuits

Absolute Maximum Ratings (Note 1)If Military/Aerospace specified devices are required,please contact the National Semiconductor Sales Office/Distribut

Seite 6 - (Continued)

Electrical Characteristics (Continued)Over recommended operating supply and temperature ranges unless otherwise specified. (Notes 2, 3)Symbol Paramete

Seite 7 - 20024742

AC Electrical Characteristics (Continued)Over recommended operating supply and temperature ranges unless otherwise specified. (Note 3)Symbol Parameter

Seite 8

DC Test CircuitsAC Test Circuits and Timing Diagrams20024703FIGURE 1. Differential Driver DC Test Circuit20024708FIGURE 2. Differential Driver Full Lo

Seite 9 - Application Information

AC Test Circuits and Timing Diagrams (Continued)20024709FIGURE 5. BLVDS Output Transition Time20024701FIGURE 6. TRI-STATE Delay Test Circuit20024704FI

Seite 10

AC Test Circuits and Timing Diagrams (Continued)DS92001 Pin Description (SOIC and LLP)Pin Name Pin # Input/Output DescriptionGND 1 P GroundIN − 2 I In

Seite 11

Typical Applications20024711FIGURE 10. Backplane Stub-Hider Application20024710FIGURE 11. Cable Repeater ApplicationDS92001www.national.com 8

Seite 12

Application InformationThe DS92001 can be used as a ’stub-hider.’ In many sys-tems, signals are distributed across backplanes, and one ofthe limiting

Kommentare zu diesen Handbüchern

Keine Kommentare

Rainbow-electronics DS92001 Bedienungsanleitung

Stöbern Sie online oder laden Sie Bedienungsanleitung nach Schalttafel Rainbow-electronics DS92001 herunter. Rainbow Electronics DS92001 User Manual Benutzerhandbuch

Inhaltsverzeichnis

Kommentare zu diesen Handbüchern

Verwandte Produkte und Handbücher für Schalttafel Rainbow-electronics DS92001