DS92LV18TVV/NOPB National Semiconductor, DS92LV18TVV/NOPB Datasheet

IC SER/DES LVDS 18BIT BUS 80LQFP

DS92LV18TVV/NOPB

Manufacturer Part Number
DS92LV18TVV/NOPB
Description
IC SER/DES LVDS 18BIT BUS 80LQFP
Manufacturer
National Semiconductor
Datasheet

Specifications of DS92LV18TVV/NOPB

Function
Serializer/Deserializer
Data Rate
2.38Gbps
Input Type
LVTTL/LVCMOS
Output Type
LVTTL, LVCMOS
Number Of Inputs
18
Number Of Outputs
1
Voltage - Supply
3.15 V ~ 3.45 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
80-LQFP
No. Of Inputs
18
No. Of Outputs
18
Supply Voltage Range
3.15V To 3.45V
Driver Case Style
LQFP
No. Of Pins
80
Msl
MSL 3 - 168 Hours
Termination Type
SMD
Rohs Compliant
Yes
Filter Terminals
SMD
Digital Ic Case Style
LQFP
For Use With
LVDS-18B-EVK - BOARD EVALUATION DS92LV18
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
*DS92LV18TVV
*DS92LV18TVV/NOPB
DS92LV18TVV

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© 2006 National Semiconductor Corporation
DS92LV18
18-Bit Bus LVDS Serializer/Deserializer - 15-66 MHz
General Description
The DS92LV18 Serializer/Deserializer (SERDES) pair trans-
parently translates a 18–bit parallel bus into a BLVDS serial
stream with embedded clock information. This single serial
stream simplifies transferring a 18-bit, or less, bus over PCB
traces and cables by eliminating the skew problems between
parallel data and clock paths. It saves system cost by nar-
rowing data paths that in turn reduce PCB layers, cable
width, and connector size and pins.
This SERDES pair includes built-in system and device test
capability. The line loopback feature enables the user to
check the integrity of the serial data transmission paths of
the transmitter and receiver while deserializing the serial
data to parallel data at the receiver outputs. The local loop-
back feature enables the user to check the integrity of the
transceiver from the local parallel-bus side.
The DS92LV18 incorporates modified BLVDS signaling on
the high-speed I/O. BLVDS provides a low power and low
noise environment for reliably transferring data over a serial
transmission path. The equal and opposite currents through
the differential data path control EMI by coupling the result-
ing fringing fields together.
Block Diagram
TRI-STATE
®
is a registered trademark of National Semiconductor Corporation.
DS200312
DS92LV18
Features
n 15–66 MHz 18:1/1:18 Serializer/Deserializer (2.376
n Independent transmitter and receiver operation with
n Hot plug protection (power up high impedance) and
n Wide
n Line and local loopback modes
n Robust BLVDS serial transmission across backplanes
n No external coding required
n Internal PLL, no external PLL components required
n Single +3.3V power supply
n Low power: 90mA (typ) transmitter, 100mA (typ) at 66
n
n Loss of lock detection and reporting pin
n Industrial −40 to +85˚C temperature range
n
n Compact, standard 80-pin LQFP package
Gbps full duplex throughput)
separate clock, enable, and power down pins
synchronization (receiver locks to random data)
system design using locally-generated clocks
and cables for low EMI
MHz with PRBS-15 pattern
±
>
100 mV receiver input threshold
2.0kV HBM ESD
±
5% reference clock frequency tolerance for easy
20031201
www.national.com
June 2006

Related parts for DS92LV18TVV/NOPB

DS92LV18TVV/NOPB Summary of contents

Page 1

... EMI by coupling the result- ing fringing fields together. Block Diagram TRI-STATE ® registered trademark of National Semiconductor Corporation. © 2006 National Semiconductor Corporation Features n 15–66 MHz 18:1/1:18 Serializer/Deserializer (2.376 Gbps full duplex throughput) n Independent transmitter and receiver operation with ...

Page 2

... 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/LVTTL Input Voltage −0. LVCMOS/LVTTL Output Voltage −0. Bus LVDS Receiver Input Voltage Bus LVDS Driver Output Voltage Bus LVDS Output Short ...

Page 3

Electrical Characteristics Over recommended operating supply and temperature ranges unless otherwise specified. Symbol Parameter Output Differential Voltage V OD (DO+) - (DO-) Output Differential Voltage ∆V OD Unbalance V Offset Voltage OS ∆V Offset Voltage Unbalance OS I Output Short ...

Page 4

Serializer Switching Characteristics Over recommended operating supply and temperature ranges unless otherwise specified. Symbol Parameter ± DO HIGH to t HZD TRI-STATE Delay ± DO LOW to t LZD TRI-STATE Delay ± DO TRI-STATE to t ZHD HIGH Delay ± ...

Page 5

Deserializer Switching Characteristics Over recommended operating supply and temperature ranges unless otherwise specified. Symbol Parameter Conditions HIGH to TRI-STATE t HZR Delay LOW to TRI-STATE t LZR Delay Figure 13 TRI-STATE to HIGH t ZHR Delay TRI-STATE to LOW t ...

Page 6

AC Timing Diagrams and Test Circuits FIGURE 1. “Worst Case” Serializer ICC Test Pattern FIGURE 2. “Worst Case” Deserializer ICC Test Pattern FIGURE 3. Serializer Bus LVDS Distributed Output Load and Transition Times FIGURE 4. Deserializer CMOS/TTL Distributed Output Load ...

Page 7

AC Timing Diagrams and Test Circuits FIGURE 5. Serializer Input Clock Transition Time FIGURE 7. Serializer TRI-STATE Test Circuit and Timing (Continued) FIGURE 6. Serializer Setup/Hold Times 7 20031207 20031208 20031209 www.national.com ...

Page 8

AC Timing Diagrams and Test Circuits FIGURE 8. Serializer PLL Lock Time, and PWRDN TRI-STATE Delays www.national.com (Continued) FIGURE 9. SYNC Timing Delay FIGURE 10. Serializer Delay 8 20031210 20031234 20031211 ...

Page 9

AC Timing Diagrams and Test Circuits FIGURE 12. Deserializer Setup and Hold Times FIGURE 13. Deserializer TRI-STATE Test Circuit and Timing (Continued) FIGURE 11. Deserializer Delay 20031213 9 20031212 20031214 www.national.com ...

Page 10

AC Timing Diagrams and Test Circuits FIGURE 14. Deserializer PLL Lock Times and PWRDN TRI-STATE Delays FIGURE 15. Deserializer PLL Lock Time from SYNCPAT www.national.com (Continued) 10 20031215 20031222 ...

Page 11

AC Timing Diagrams and Test Circuits FIGURE 16. Deterministic Jitter and Ideal Bit Position t is the noise margin on the left of the figure above. RNMI the noise margin on the right of the above figure. RNMI-R ...

Page 12

AC Timing Diagrams and Test Circuits + − (DO )–( Differential output signal is shown as (DO+)–(DO−), device in Data Transfer mode. FIGURE 19. Typical ICC vs. Frequency with PRBS-15 Pattern (Transmitter Only) FIGURE 20. Typical ...

Page 13

Functional Description The DS92LV18 combines a serializer and deserializer onto a single chip. The serializer accepts an 18-bit LVCMOS or LVTTL data bus and transforms it into a BLVDS serial data stream with embedded clock information. The deserializer then recovers ...

Page 14

Resynchronization (Continued) The user can choose to resynchronize to the random data stream or to force fast synchronization by pulsing the Seri- alizer’s SYNC pin. Lock times depend on serial data stream characteristics. The primary constraint on the "random" lock ...

Page 15

Application Information RECOVERING FROM LOCK LOSS In the case where the Serializer loses lock during data transmission cycles of data that were previously received could be invalid. This is due to a delay in the lock detection ...

Page 16

Application Information PVDD = PLL SECTION POWER SUPPLY The PVDD pin supplies the PLL circuit. Note that the DS92LV18 has two separate PLL and supply pins. The PLL(s) require clean power for the minimization of Jitter. A supply noise frequency ...

Page 17

Footprint Changes between the DS92LV16 and the DS92LV18 Pin Number PCB Compatibility Between the DS92LV16 and DS92LV18 DS92LV16 vs. DS92LV18 Footprint Changes DS92LV16 CONFIG1 CONFIG2 DVDD DGND FIGURE 21. 17 DS92LV18 DIN17 DIN16 ROUT16 ROUT17 20031233 ...

Page 18

Pin Diagram www.national.com DS92LV18TVV Top View 18 20031202 ...

Page 19

Pin Descriptions Pin # Pin Name 1 RPWDN 2 REN 4 REFCLK 5, 10, 11, 15 AVDD 6,9,12,16 AGND 7 RIN+ 8 RIN- 13 DO+ 14 DO- 17 TCLK 19 DEN 20 SYNC 3, 18,21, 22, 23, 24, 25, DIN ...

Page 20

... BANNED SUBSTANCE COMPLIANCE National Semiconductor follows the provisions of the Product Stewardship Guide for Customers (CSP-9-111C2) and Banned Substances and Materials of Interest Specification (CSP-9-111S2) for regulatory environmental compliance. Details may be found at: www.national.com/quality/green. ...

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