Product Folder Sample & Buy Support & Community Tools & Software Technical Documents DS90LV031A SNLS020D - JULY 1999 - REVISED AUGUST 2016 DS90LV031A 3-V LVDS Quad CMOS Differential Line Driver 1 Features 3 Description * * * * * * * * * The DS90LV031A is a quad CMOS differential line driver designed for applications requiring ultra low power dissipation and high data rates. The device is designed to support data rates in excess of 400 Mbps (200 MHz) using Low Voltage Differential Signaling (LVDS) technology. 1 * * * >400-Mbps (200-MHz) Switching Rates 0.1-ns Typical Differential Skew 0.4-ns Maximum Differential Skew 2-ns Maximum Propagation Delay 3.3-V Power Supply Design 350-mV Differential Signaling Low Power Dissipation (13-mW at 3.3-V Static) Interoperable With Existing 5-V LVDS Devices Compatible With IEEE 1596.3 SCI LVDS Standard Compatible With TIA/EIA-644 LVDS Standard Industrial Operating Temperature Range Available in SOIC and TSSOP Surface-Mount Packaging The DS90LV031A accepts low voltage LVTTL or LVCMOS input levels and translates them to low voltage (350 mV) differential output signals. In addition the driver supports a TRI-STATE(R) function that may be used to disable the output stage, disabling the load current, and thus dropping the device to an ultra low idle power state of 13 mW typical. The EN and EN* inputs allow active Low or active High control of the TRI-STATE outputs. The enables are common to all four drivers. The DS90LV031A and companion line receiver (DS90LV032A) provide a new alternative to high power psuedo-ECL devices for high speed point-to-point interface applications. 2 Applications * * Building And Factory Automation Grid Infrastructure Device Information(1) PART NUMBER DS90LV031A PACKAGE BODY SIZE (NOM) SOIC (16) 9.90 mm x 3.91 mm TSSOP (16) 5.00 mm x 4.40 mm (1) For all available packages, see the orderable addendum at the end of the data sheet. Block Diagram + RIN1 DOUT1+ R1 DOUT1- + DOUT2+ R2 RIN2 DOUT2- + DOUT3+ R3 RIN3 DOUT3- + RIN4 DOUT4+ R4 DOUT4- EN EN* Copyright (c) 2016, Texas Instruments Incorporated 1 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. DS90LV031A SNLS020D - JULY 1999 - REVISED AUGUST 2016 www.ti.com Table of Contents 1 2 3 4 5 6 7 8 Features .................................................................. Applications ........................................................... Description ............................................................. Revision History..................................................... Pin Configuration and Functions ......................... Specifications......................................................... 1 1 1 2 3 3 6.1 6.2 6.3 6.4 6.5 6.6 6.7 6.8 3 4 4 4 5 6 6 7 Absolute Maximum Ratings ...................................... ESD Ratings.............................................................. Recommended Operating Conditions....................... Thermal Information .................................................. Electrical Characteristics........................................... Switching Characteristics - Industrial ....................... Dissipation Ratings ................................................... Typical Characteristics .............................................. Parameter Measurement Information .................. 8 Detailed Description ............................................ 10 8.1 Overview ................................................................. 10 8.2 Functional Block Diagram ....................................... 11 8.3 Feature Description................................................. 11 8.4 Device Functional Modes........................................ 11 9 Application and Implementation ........................ 12 9.1 Application Information............................................ 12 9.2 Typical Application ................................................. 12 10 Power Supply Recommendations ..................... 13 11 Layout................................................................... 14 11.1 Layout Guidelines ................................................. 14 11.2 Layout Example .................................................... 15 12 Device and Documentation Support ................. 16 12.1 12.2 12.3 12.4 12.5 12.6 Documentation Support ........................................ Receiving Notification of Documentation Updates Community Resources.......................................... Trademarks ........................................................... Electrostatic Discharge Caution ............................ Glossary ................................................................ 16 16 16 16 16 16 13 Mechanical, Packaging, and Orderable Information ........................................................... 16 4 Revision History NOTE: Page numbers for previous revisions may differ from page numbers in the current version. Changes from Revision C (April 2013) to Revision D * Added ESD Ratings table, Feature Description section, Device Functional Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and Mechanical, Packaging, and Orderable Information section. ................................................................................................. 1 Changes from Revision B (April 2013) to Revision C * 2 Page Page Changed layout of National Semiconductor Data Sheet to TI format .................................................................................... 1 Submit Documentation Feedback Copyright (c) 1999-2016, Texas Instruments Incorporated Product Folder Links: DS90LV031A DS90LV031A www.ti.com SNLS020D - JULY 1999 - REVISED AUGUST 2016 5 Pin Configuration and Functions D or PW Package 16-Pin SOIC or TSSOP Top View Pin Functions PIN NAME NO. I/O DESCRIPTION DIN 1, 7, 9, 15 I Driver input pin, TTL/CMOS compatible DOUT+ 2, 6, 10, 14 O Noninverting driver output pin, LVDS levels DOUT- 3, 5, 11, 13 O Inverting driver output pin, LVDS levels EN 4 I Active high enable pin, OR-ed with EN EN 12 I Active low enable pin, OR-ed with EN GND 8 -- Ground pin VCC 16 -- Power supply pin, 3.3 V 0.3 V 6 Specifications 6.1 Absolute Maximum Ratings over operating free-air temperature range (unless otherwise noted) (1) MIN MAX UNIT Supply voltage, VCC -0.3 4 V Input voltage, DIN -0.3 VCC + 0.3 V Enable input voltage, EN, EN* -0.3 VCC + 0.3 V Output voltage, DOUT+, DOUT- -0.3 3.9 V 260 C 150 C 150 C Short circuit duration, DOUT+, DOUT- Continuous Lead temperature, soldering (4 s) Maximum junction temperature Storage temperature, Tstg (1) -65 Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. Submit Documentation Feedback Copyright (c) 1999-2016, Texas Instruments Incorporated Product Folder Links: DS90LV031A 3 DS90LV031A SNLS020D - JULY 1999 - REVISED AUGUST 2016 www.ti.com 6.2 ESD Ratings V(ESD) (1) Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001 (1) Electrostatic discharge VALUE UNIT 6000 V JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process. Manufacturing with less than 500-V HBM is possible with the necessary precautions. 6.3 Recommended Operating Conditions VCC Supply voltage TA Operating free-air temperature, industrial MIN NOM MAX UNIT 3 3.3 3.6 V -40 25 85 C 6.4 Thermal Information DS90LV031A THERMAL METRIC (1) PW (TSSOP) D (SOIC) 16 PINS 16 PINS UNIT RJA Junction-to-ambient thermal resistance 114 75 C/W RJC(top) Junction-to-case (top) thermal resistance 51 36 C/W RJB Junction-to-board thermal resistance 59 32 C/W JT Junction-to-top characterization parameter 8 6 C/W JB Junction-to-board characterization parameter 58 31.7 C/W (1) 4 For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application report. Submit Documentation Feedback Copyright (c) 1999-2016, Texas Instruments Incorporated Product Folder Links: DS90LV031A DS90LV031A www.ti.com SNLS020D - JULY 1999 - REVISED AUGUST 2016 6.5 Electrical Characteristics over supply voltage and operating temperature ranges (unless otherwise noted) (1) (2) (3) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT 250 350 450 mV 4 35 |mV| 1.25 1.375 VOD1 Differential output voltage RL = 100 , DOUT-, DOUT+ pins (see Figure 3) VOD1 Change in magnitude of VOD1 for complementary output states RL = 100 , DOUT-, DOUT+ pins (see Figure 3) VOS Offset voltage RL = 100 , DOUT-, DOUT+ pins (see Figure 3) VOS Change in magnitude of VOS for complementary output states RL = 100 , DOUT-, DOUT+ pins (see Figure 3) 5 25 |mV| VOH Output voltage high RL = 100 , DOUT-, DOUT+ pins (see Figure 3) 1.38 1.6 V VOL Output voltage low RL = 100 , DOUT-, DOUT+ pins (see Figure 3) VIH Input voltage high DIN, EN, EN* pins 2 VCC VIL Input voltage low DIN, EN, EN* pins GND 0.8 V IIH Input current high VIN = VCC or 2.5 V, DIN, EN, EN* pins 1 10 A IIL Input current low VIN = GND or 0.4 V, DIN, EN, EN* pins -10 1 10 A VCL Input clamp voltage ICL = -18 mA, DIN, EN, EN* pins -1.5 -0.8 IOS Output short circuit current Enabled, DOUT-, DOUT+ pins (4), DIN = VCC, DOUT+ = 0 V, or DIN = GND, DOUT- = 0 V -6 -9 mA IOSD Differential output short circuit current Enabled, VOD = 0 V, DOUT-, DOUT+ pins (4) -6 -9 mA IOFF Power-off leakage VOUT = 0 V or 3.6 V, VCC = 0 V or open, DOUT-, DOUT+ pins -20 1 20 A IOZ Output TRI-STATE current EN = 0.8 V and EN* = 2 V, VOUT = 0 V or VCC, DOUT-, DOUT+ pins -10 1 10 A ICC No load supply current drivers enabled DIN = VCC or GND, VCC pin 5 8 mA ICCL Loaded supply current drivers enabled RL = 100 (all channels), DIN = VCC or GND (all inputs), VCC pin 23 30 mA ICCZ No load supply current drivers disabled DIN = VCC or GND, EN = GND, EN* = VCC, VCC pin 2.6 6 mA (1) (2) (3) (4) 1.125 0.90 -10 V 1.03 V V V Current into device pins is defined as positive. Current out of device pins is defined as negative. All voltages are referenced to ground except: VOD1 and VOD1. All typicals are given for: VCC = 3.3 V, TA = 25C. The DS90LV031A is a current mode device and only functions within datasheet specifications when a resistive load is applied to the driver outputs typical range is (90 to 110 ) Output short-circuit current (IOS) is specified as magnitude only, minus sign indicates direction only. Submit Documentation Feedback Copyright (c) 1999-2016, Texas Instruments Incorporated Product Folder Links: DS90LV031A 5 DS90LV031A SNLS020D - JULY 1999 - REVISED AUGUST 2016 www.ti.com 6.6 Switching Characteristics - Industrial VCC = 3.3 V 10% and TA = -40C to 85C (unless otherwise noted) (1) (2) (3) MIN NOM MAX UNIT tPHLD Differential propagation delay high to low RL = 100 and CL = 10 pF (see Figure 4 and Figure 5) 0.8 1.18 2 ns tPLHD Differential propagation delay low to high RL = 100 and CL = 10 pF (see Figure 4 and Figure 5) 0.8 1.25 2 ns tSKD1 Differential pulse skew (4) |tPHLD - tPLHD| RL = 100 and CL = 10 pF (see Figure 4 and Figure 5) 0 0.07 0.4 ns tSKD2 Channel-to-channel skew (5) RL = 100 and CL = 10 pF (see Figure 4 and Figure 5) 0 0.1 0.5 ns tSKD3 Differential part-to-part skew (6) RL = 100 and CL = 10 pF (see Figure 4 and Figure 5) 0 1 ns tSKD4 Differential part-to-part skew (7) RL = 100 and CL = 10 pF (see Figure 4 and Figure 5) 0 1.2 ns tTLH Rise time RL = 100 and CL = 10 pF (see Figure 4 and Figure 5) 0.38 1.5 ns tTHL Fall time RL = 100 and CL = 10 pF (see Figure 4 and Figure 5) 0.4 1.5 ns tPHZ Disable time high to Z RL = 100 and CL = 10 pF (see Figure 6 and Figure 7) 5 ns tPLZ Disable time low to Z RL = 100 and CL = 10 pF (see Figure 6 and Figure 7) 5 ns tPZH Enable time Z to high RL = 100 and CL = 10 pF (see Figure 6 and Figure 7) 7 ns tPZL Enable time Z to low RL = 100 and CL = 10 pF (see Figure 6 and Figure 7) 7 ns fMAX (1) (2) (3) (4) (5) (6) (7) (8) Maximum operating frequency (8) 200 250 MHz All typicals are given for: VCC = 3.3 V, TA = 25C. Generator waveform for all tests unless otherwise specified: f = 1 MHz, ZO = 50 , tr 1 ns, and tf 1 ns. CL includes probe and jig capacitance. tSKD1, |tPHLD - tPLHD| is the magnitude difference in differential propagation delay time between the positive going edge and the negative going edge of the same channel. tSKD2 is the differential channel-to-channel skew of any event on the same device. tSKD3, differential part-to-part skew, is defined as the difference between the minimum and maximum specified differential propagation delays. This specification applies to devices at the same VCC and within 5C of each other within the operating temperature range. tSKD4, part-to-part skew, is the differential channel-to-channel skew of any event between devices. This specification applies to devices over recommended operating temperature and voltage ranges, and across process distribution. tSKD4 is defined as |Max - Min| differential propagation delay. fMAX generator input conditions: tr = tf < 1 ns, (0% to 100%), 50% duty cycle, 0 V to 3 V. Output criteria: duty cycle = 45% / 55%, VOD > 250 mV, all channels switching. 6.7 Dissipation Ratings MAXIMUM PACKAGE POWER DISSIPATION AT 25C 6 D package 1088 mW PW package 866 mW Derate D package 8.5 mW/C above 25C Derate PW package 6.9 mW/C above 25C Submit Documentation Feedback Copyright (c) 1999-2016, Texas Instruments Incorporated Product Folder Links: DS90LV031A DS90LV031A www.ti.com SNLS020D - JULY 1999 - REVISED AUGUST 2016 6.8 Typical Characteristics Figure 1. Typical DS90LV031A, DOUT (Single-Ended) vs RL, TA = 25C Figure 2. Typical DS90LV031A, DOUT vs RL, VCC = 3.3 V, TA = 25C Submit Documentation Feedback Copyright (c) 1999-2016, Texas Instruments Incorporated Product Folder Links: DS90LV031A 7 DS90LV031A SNLS020D - JULY 1999 - REVISED AUGUST 2016 www.ti.com 7 Parameter Measurement Information Figure 3. Driver VOD and VOS Test Circuit Figure 4. Driver Propagation Delay and Transition Time Test Circuit Figure 5. Driver Propagation Delay and Transition Time Waveforms 8 Submit Documentation Feedback Copyright (c) 1999-2016, Texas Instruments Incorporated Product Folder Links: DS90LV031A DS90LV031A www.ti.com SNLS020D - JULY 1999 - REVISED AUGUST 2016 Parameter Measurement Information (continued) Figure 6. Driver TRI-STATE Delay Test Circuit Figure 7. Driver TRI-STATE Delay Waveforms Submit Documentation Feedback Copyright (c) 1999-2016, Texas Instruments Incorporated Product Folder Links: DS90LV031A 9 DS90LV031A SNLS020D - JULY 1999 - REVISED AUGUST 2016 www.ti.com 8 Detailed Description 8.1 Overview LVDS drivers and receivers are intended to be primarily used in an uncomplicated point-to-point configuration as is shown in Figure 9. This configuration provides a clean signaling environment for the quick edge rates of the drivers. The receiver is connected to the driver through a balanced media which may be a standard twisted pair cable, a parallel pair cable, or simply PCB traces. Typically, the characteristic differential impedance of the media is in the range of 100 . A termination resistor of 100 must be selected to match the media, and is located as close to the receiver input pins as possible. The termination resistor converts the current sourced by the driver into a voltage that is detected by the receiver. Other configurations are possible such as a multi-receiver configuration, but the effects of a mid-stream connector(s), cable stub(s), and other impedance discontinuities as well as ground shifting, noise margin limits, and total termination loading must be considered. The DS90LV031A differential line driver is a balanced current source design. A current mode driver, generally speaking has a high output impedance and supplies a constant current for a range of loads (a voltage mode driver on the other hand supplies a constant voltage for a range of loads). Current is switched through the load in one direction to produce a logic state and in the other direction to produce the other logic state. The output current is typically 3.5 mA, a minimum of 2.5 mA, and a maximum of 4.5 mA. The current mode requires (as discussed above) that a resistive termination be employed to terminate the signal and to complete the loop as shown in Figure 9. AC or unterminated configurations are not allowed. The 3.5-mA loop current develops a differential voltage of 350 mV across the 100- termination resistor which the receiver detects with a 250-mV minimum differential noise margin neglecting resistive line losses (driven signal minus receiver threshold (350 mV - 100 mV = 250 mV)). The signal is centered around 1.2 V (Driver Offset, VOS) with respect to ground as shown in Figure 8. Note that the steady-state voltage (VSS) peak-to-peak swing is twice the differential voltage (VOD) and is typically 700 mV. The current mode driver provides substantial benefits over voltage mode drivers, such as an RS-422 driver. Its quiescent current remains relatively flat versus switching frequency. Whereas the RS-422 voltage mode driver increases exponentially in most case between 20 MHz to 50 MHz. This is due to the overlap current that flows between the rails of the device when the internal gates switch. Whereas the current mode driver switches a fixed current between its output without any substantial overlap current. This is similar to some ECL and PECL devices, but without the heavy static ICC requirements of the ECL or PECL designs. LVDS requires >80% less current than similar PECL devices. AC specifications for the driver are a tenfold improvement over other existing RS-422 drivers. The TRI-STATE function allows the driver outputs to be disabled, thus obtaining an even lower power state when the transmission of data is not required. The footprint of the DS90LV031A is the same as the industry standard 26LS31 Quad Differential (RS-422) Driver and is a step-down replacement for the 5-V DS90C031 Quad Driver. 10 Submit Documentation Feedback Copyright (c) 1999-2016, Texas Instruments Incorporated Product Folder Links: DS90LV031A DS90LV031A www.ti.com SNLS020D - JULY 1999 - REVISED AUGUST 2016 8.2 Functional Block Diagram + RIN1 DOUT1+ R1 DOUT1- + DOUT2+ R2 RIN2 DOUT2- + DOUT3+ R3 RIN3 DOUT3- + RIN4 DOUT4+ R4 DOUT4- EN EN* Copyright (c) 2016, Texas Instruments Incorporated 8.3 Feature Description 8.3.1 Fail-Safe LVDS Interface If the LVDS link as shown in Figure 9 needs to support the case where the Line Driver is disabled, powered off, or removed (unplugged) and the Receiver device is powered on and enabled, the state of the LVDS bus is unknown and therefore the output state of the Receiver is also unknown. If this is of concern, consult the respective LVDS Receiver data sheet for guidance on Fail-safe Biasing options for the LVDS interface to set a known state on the inputs for these conditions. Figure 8. Driver Output Levels 8.4 Device Functional Modes Table 1 lists the functional modes of DS90LV031A. Table 1. Truth Table ENABLES INPUT OUTPUTS EN EN* DIN DOUT+ L H X Z Z L L H H H L All other combinations of ENABLE inputs DOUT- Submit Documentation Feedback Copyright (c) 1999-2016, Texas Instruments Incorporated Product Folder Links: DS90LV031A 11 DS90LV031A SNLS020D - JULY 1999 - REVISED AUGUST 2016 www.ti.com 9 Application and Implementation NOTE Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI's customers are responsible for determining suitability of components for their purposes. Customers should validate and test their design implementation to confirm system functionality. 9.1 Application Information The DS90LV031A has a flow-through pinout that allows for easy PCB layout. The LVDS signals on one side of the device easily allows for matching electrical lengths of the differential pair trace lines between the driver and the receiver as well as allowing the trace lines to be close together to couple noise as common-mode. Noise isolation is achieved with the LVDS signals on one side of the device and the TTL signals on the other side. See Related Documentation for general application guidelines and hints for LVDS drivers and receivers. 9.2 Typical Application ENABLE Any LVDS Receiver DATA INPUT RT 100Y + DATA OUTPUT 1/4 DS9OLVO31A Copyright (c) 2016, Texas Instruments Incorporated Figure 9. Point-to-Point Application 9.2.1 Design Requirements When using LVDS devices, it is important to remember to specify controlled impedance PCB traces, cable assemblies, and connectors. All components of the transmission media must have a matched differential impedance of about 100 . They must not introduce major impedance discontinuities. Balanced cables (for example, twisted pair) are usually better than unbalanced cables (ribbon cable) for noise reduction and signal quality. Balanced cables tend to generate less EMI due to field canceling effects and also tend to pick up electromagnetic radiation as common-mode (not differential mode) noise which is rejected by the LVDS receiver. 9.2.2 Detailed Design Procedure 9.2.2.1 Probing LVDS Transmission Lines Always use high impedance (>100 k), low capacitance (<2 pF) scope probes with a wide bandwidth (1 GHz) scope. Improper probing gives deceiving results. 9.2.2.2 Cables and Connectors, General Comments When choosing cable and connectors for LVDS it is important to remember: Use controlled impedance media. The cables and connectors you use must have a matched differential impedance of about 100 . They must not introduce major impedance discontinuities. Balanced cables (for example, twisted pair) are usually better than unbalanced cables (such as ribbon cable or simple coax) for noise reduction and signal quality. Balanced cables tend to generate less EMI due to field canceling effects and also tend to pick up electromagnetic radiation as common-mode (not differential mode) noise which is rejected by the receiver. For cable distances < 0.5 m, most cables can be made to work effectively. For distances 0.5 m d 10 m, Category 3 (CAT 3) twisted pair cable works well, is readily available, and relatively inexpensive. 12 Submit Documentation Feedback Copyright (c) 1999-2016, Texas Instruments Incorporated Product Folder Links: DS90LV031A DS90LV031A www.ti.com SNLS020D - JULY 1999 - REVISED AUGUST 2016 Typical Application (continued) 9.2.3 Application Curves Figure 10. Typical DS90LV031A, DOUT (Single-Ended) vs RL, TA = 25C Figure 11. Typical DS90LV031A, DOUT vs RL, VCC = 3.3 V, TA = 25C 10 Power Supply Recommendations Although the DS90LV031A draws very little power, at higher switching frequencies there is a small dynamic current component which increases the overall power consumption. The DS90LV031A power supply design must include local decoupling capacitance to maintain optimal device performance at higher data rates. Submit Documentation Feedback Copyright (c) 1999-2016, Texas Instruments Incorporated Product Folder Links: DS90LV031A 13 DS90LV031A SNLS020D - JULY 1999 - REVISED AUGUST 2016 www.ti.com 11 Layout 11.1 Layout Guidelines * * * Use at least 4 PCB layers (top to bottom): LVDS signals, ground, power, and TTL signals. Isolate TTL signals from LVDS signals, otherwise the TTL may couple onto the LVDS lines. It is best to put TTL and LVDS signals on different layers which are isolated by power or ground plane(s). Keep drivers and receivers as close to the (LVDS port side) connectors as possible. 11.1.1 Power Decoupling Recommendations Bypass capacitors must be used on power pins. High frequency ceramic (surface-mount recommended) 0.1-F in parallel with 0.01-F, in parallel with 0.001-F at the power supply pin as well as scattered capacitors over the printed-circuit board. Multiple vias must be used to connect the decoupling capacitors to the power planes. A 10F, 35-V (or greater) solid tantalum capacitor must be connected at the power entry point on the printedcircuit board. 11.1.2 Differential Traces Use controlled impedance traces which match the differential impedance of your transmission medium (that is, cable) and termination resistor. Run the differential pair trace lines as close together as possible as soon as they leave the IC (stubs must be < 10 mm long). This helps eliminate reflections and ensure noise is coupled as common-mode. Lab experiments show that differential signals which are 1 mm apart radiate far less noise than traces 3 mm apart because magnetic field cancellation is greater with the closer traces. Plus, noise induced on the differential lines is much more likely to appear as common-mode which is rejected by the receiver. Match electrical lengths between traces to reduce skew. Skew between the signals of a pair means a phase difference between signals which destroys the magnetic field cancellation benefits of differential signals and results in EMI. Note the velocity of propagation, v = c/Er where c (the speed of light) = 0.2997 mm/ps or 0.0118 in/ps. Do not rely solely on the auto-route function for differential traces. Carefully review dimensions to match differential impedance and provide isolation for the differential lines. Minimize the number of vias and other discontinuities on the line. Avoid 90 turns (these cause impedance discontinuities). Use arcs or 45 bevels. Within a pair of traces, the distance between the two traces must be minimized to maintain common-mode rejection of the receivers. On the printed-circuit board, this distance must remain constant to avoid discontinuities in differential impedance. Minor violations at connection points are allowable. 11.1.3 Termination Use a resistor which best matches the differential impedance of your transmission line. The resistor must be between 90 and 130 . Remember that the current mode outputs need the termination resistor to generate the differential voltage. LVDS will not work without resistor termination. Typically, connect a single resistor across the pair at the receiver end. Surface-mount 1% to 2% resistors are best. PCB stubs, component lead, and the distance from the termination to the receiver inputs must be minimized. The distance between the termination resistor and the receiver must be < 10 mm (12 mm maximum). 14 Submit Documentation Feedback Copyright (c) 1999-2016, Texas Instruments Incorporated Product Folder Links: DS90LV031A DS90LV031A www.ti.com SNLS020D - JULY 1999 - REVISED AUGUST 2016 11.2 Layout Example Decoupling Cap DS90LV031A Input Termination (Required at Receiver) LVCMOS Input Input Termination (Required at Receiver) LVCMOS Input 1 DIN1 VCC 16 2 DOUT1+ DIN4 15 3 DOUT1- DOUT4+ 14 4 EN DOUT4- 13 5 DOUT2- EN* 12 6 DOUT2+ DOUT3- 11 7 DIN2 DOUT3+ 10 8 GND DIN3 9 LVCMOS Input Input Termination (Required at Receiver) Input Termination (Required at Receiver) LVCMOS Input Control Signals Figure 12. DS90LV031A Example Layout Submit Documentation Feedback Copyright (c) 1999-2016, Texas Instruments Incorporated Product Folder Links: DS90LV031A 15 DS90LV031A SNLS020D - JULY 1999 - REVISED AUGUST 2016 www.ti.com 12 Device and Documentation Support 12.1 Documentation Support 12.1.1 Related Documentation For related documentation see the following: * LVDS Owner's Manual * AN-808 Long Transmission Lines and Data Signal Quality (SNLA028) * AN-977 LVDS Signal Quality: Jitter Measurements Using Eye Patterns Test Report #1 (SNLA166) * AN-971 An Overview of LVDS Technology (SNLA165) * AN-916 A Practical Guide to Cable Selection (SNLA219) * AN-805 Calculating Power Dissipation for Differential Line Drivers (SNOA233) * AN-903 A Comparison of Differential Termination Techniques (SNLA034) * AN-1035 PCB Design Guidelines for LVDS Technology (SNOA355) 12.2 Receiving Notification of Documentation Updates To receive notification of documentation updates, navigate to the device product folder on ti.com. In the upper right corner, click on Alert me to register and receive a weekly digest of any product information that has changed. For change details, review the revision history included in any revised document. 12.3 Community Resources The following links connect to TI community resources. Linked contents are provided "AS IS" by the respective contributors. They do not constitute TI specifications and do not necessarily reflect TI's views; see TI's Terms of Use. TI E2ETM Online Community TI's Engineer-to-Engineer (E2E) Community. Created to foster collaboration among engineers. At e2e.ti.com, you can ask questions, share knowledge, explore ideas and help solve problems with fellow engineers. Design Support TI's Design Support Quickly find helpful E2E forums along with design support tools and contact information for technical support. 12.4 Trademarks E2E is a trademark of Texas Instruments. TRI-STATE is a registered trademark of Texas Instruments. All other trademarks are the property of their respective owners. 12.5 Electrostatic Discharge Caution These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. 12.6 Glossary SLYZ022 -- TI Glossary. This glossary lists and explains terms, acronyms, and definitions. 13 Mechanical, Packaging, and Orderable Information The following pages include mechanical, packaging, and orderable information. This information is the most current data available for the designated devices. This data is subject to change without notice and revision of this document. For browser-based versions of this data sheet, refer to the left-hand navigation. 16 Submit Documentation Feedback Copyright (c) 1999-2016, Texas Instruments Incorporated Product Folder Links: DS90LV031A PACKAGE OPTION ADDENDUM www.ti.com 24-Feb-2016 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Pins Package Drawing Qty Eco Plan Lead/Ball Finish MSL Peak Temp (2) (6) (3) Op Temp (C) Device Marking (4/5) DS90LV031ATM NRND SOIC D 16 48 TBD Call TI Call TI -40 to 85 DS90LV031A TM DS90LV031ATM/NOPB ACTIVE SOIC D 16 48 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 85 DS90LV031A TM DS90LV031ATMTC NRND TSSOP PW 16 92 TBD Call TI Call TI -40 to 85 DS90LV 031AT DS90LV031ATMTC/NOPB ACTIVE TSSOP PW 16 92 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 85 DS90LV 031AT DS90LV031ATMTCX/NOPB ACTIVE TSSOP PW 16 2500 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 85 DS90LV 031AT DS90LV031ATMX NRND SOIC D 16 2500 TBD Call TI Call TI -40 to 85 DS90LV031A TM DS90LV031ATMX/NOPB ACTIVE SOIC D 16 2500 Green (RoHS & no Sb/Br) CU SN | Call TI Level-1-260C-UNLIM -40 to 85 DS90LV031A TM (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. TBD: The Pb-Free/Green conversion plan has not been defined. Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes. Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above. Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material) (3) MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. (4) There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device. Addendum-Page 1 Samples PACKAGE OPTION ADDENDUM www.ti.com 24-Feb-2016 (5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation of the previous line and the two combined represent the entire Device Marking for that device. (6) Lead/Ball Finish - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead/Ball Finish values may wrap to two lines if the finish value exceeds the maximum column width. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. 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Addendum-Page 2 PACKAGE MATERIALS INFORMATION www.ti.com 24-Feb-2016 TAPE AND REEL INFORMATION *All dimensions are nominal Device DS90LV031ATMTCX/NO PB Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant TSSOP PW 16 2500 330.0 12.4 6.95 5.6 1.6 8.0 12.0 Q1 DS90LV031ATMX SOIC D 16 2500 330.0 16.4 6.5 10.3 2.3 8.0 16.0 Q1 DS90LV031ATMX/NOPB SOIC D 16 2500 330.0 16.4 6.5 10.3 2.3 8.0 16.0 Q1 Pack Materials-Page 1 PACKAGE MATERIALS INFORMATION www.ti.com 24-Feb-2016 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) TSSOP PW 16 2500 367.0 367.0 35.0 DS90LV031ATMX SOIC D 16 2500 367.0 367.0 35.0 DS90LV031ATMX/NOPB SOIC D 16 2500 367.0 367.0 35.0 DS90LV031ATMTCX/NOP B Pack Materials-Page 2 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. 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