DS91M125EVK National Semiconductor, DS91M125EVK Datasheet

no-image

DS91M125EVK

Manufacturer Part Number
DS91M125EVK
Description
Manufacturer
National Semiconductor
Datasheet
1.DS91M125EVK.pdf (12 pages)

Specifications of DS91M125EVK

Lead Free Status / RoHS Status
Not Compliant
© 2009 National Semiconductor Corporation
125 MHz 1:4 M-LVDS Repeater with LVDS Input
General Description
The DS91M125 is a 1:4 M-LVDS repeater designed for driv-
ing and distributing clock or data signals to up to four multi-
point networks.
M-LVDS (Multipoint LVDS) is a new family of bus interface
devices based on LVDS technology specifically designed for
multipoint and multidrop cable and backplane applications. It
differs from standard LVDS in providing increased drive cur-
rent to handle double terminations that are required in multi-
point applications. Controlled transition times minimize re-
flections that are common in multipoint configurations due to
unterminated stubs.
A single DS91M125 channel is a 1:4 repeater that accepts
M-LVDS/LVDS/CML/LVPECL signals and converts them to
M-LVDS signal levels. Each output has an associated inde-
pendent driver enable pin. The DS91M125 input conforms to
the LVDS standard.
The DS91M125 has a flow-through pinout for easy PCB lay-
out. It provides a new alternative for high speed multipoint
interface applications. It is packaged in a space saving
SOIC-16 package.
Typical Application
300542
DS91M125
Features
■
■
■
■
■
■
■
■
■
Applications
■
■
■
DC - 125 MHz / 250 Mbps low jitter, low skew, low power
operation
Independent Driver Enable pins
Outputs Conform to TIA/EIA-899 M-LVDS Standard
Controlled transition times minimize reflections
Inputs Conform to TIA/EIA-644-A LVDS Standard
8 kV ESD on M-LVDS output pins protects adjoining
components
Flow-through pinout simplifies PCB layout
Industrial operating temperature range (−40°C to +85°C)
Available in a space saving SOIC-16 package
Multidrop / Multipoint clock and data distribution
High-Speed, Low Power, Short-Reach alternative to
TIA/EIA-485/422
Clock distribution in AdvancedTCA (ATCA) and MicroTCA
(μTCA, uTCA) backplanes
November 9, 2009
www.national.com
30054202

DS91M125EVK Summary of contents

Page 1

... The DS91M125 has a flow-through pinout for easy PCB lay- out. It provides a new alternative for high speed multipoint interface applications packaged in a space saving SOIC-16 package. Typical Application © 2009 National Semiconductor Corporation DS91M125 Features ■ 125 MHz / 250 Mbps low jitter, low skew, low power operation ■ ...

Page 2

Ordering Information Order Number DS91M125TMA Connection Diagram Logic Diagram Pin Descriptions Number Name DI+ 7 DI- 5 GND 10, 11, 14 12, 13 www.national.com Function 1:4 ...

Page 3

... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage LVCMOS Input Voltages M-LVDS Output Voltages LVDS Input Voltages Maximum Package Power Dissipation at +25°C SOIC Package Derate SOIC Package 19.2 mW/° ...

Page 4

Symbol Parameter I Driver output power-off current A(OFF) I Driver output power-off current B(OFF) I Driver output power-off differential current (I AB(OFF B(OFF) C Driver output capacitance A C Driver output capacitance B C Driver output differential capacitance ...

Page 5

Switching Characteristics Over recommended operating supply and temperature ranges unless otherwise specified. Symbol Parameter DRIVER AC SPECIFICATION t Differential Propagation Delay Low to High PLH t Differential Propagation Delay High to Low PHL Pulse Skew |t − ...

Page 6

Test Circuits and Waveforms www.national.com FIGURE 1. Differential Driver Test Circuit FIGURE 2. Differential Driver Waveforms FIGURE 3. Differential Driver Full Load Test Circuit 6 30054214 30054244 30054222 ...

Page 7

FIGURE 4. Differential Driver DC Open Test Circuit FIGURE 5. Differential Driver Short-Circuit Test Circuit FIGURE 6. Driver Propagation Delay and Transition Time Test Circuit 7 30054212 30054225 30054216 www.national.com ...

Page 8

FIGURE 7. Driver Propagation Delays and Transition Time Waveforms www.national.com FIGURE 8. Driver TRI-STATE Delay Test Circuit FIGURE 9. Driver TRI-STATE Delay Waveforms 8 30054218 30054219 30054221 ...

Page 9

Typical Performance Characteristics Driver Rise Time as a Function of Temperature Driver Output Signal Amplitude as a Function of Resistive Load Driver Propagation Delay (tPHLD Function of Temperature 30054250 Driver Fall Time as a Function of Temperature 30054258 ...

Page 10

Physical Dimensions 16-Lead (0.150 Wide) Molded Small Outline Package, JEDEC www.national.com inches (millimeters) unless otherwise noted Order Number DS91M125TMA NS Package Number M16A 10 ...

Page 11

Notes 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 ...