SN65LVDS388, SN65LVDT388, SN75LVDS388, SN75LVDT388 HIGH-SPEED DIFFERENTIAL LINE RECEIVERS SLLS448A – SEPTEMBER 2000 – REVISED MAY 2001 D D D D D D D D D D D Eight Line Receivers Meet or Exceed the Requirements of ANSI TIA/EIA-644 Standard Integrated 110-Ω Line Termination Resistors on LVDT Products Designed for Signaling Rates† Up To 630 Mbps SN65 Version’s Bus-Terminal ESD Exceeds 15 kV Operates From a Single 3.3-V Supply Propagation Delay Time of 2.6 ns (Typ) Output Skew 100 ps (Typ) Part-To-Part Skew Is Less Than 1 ns LVTTL Levels Are 5-V Tolerant Open-Circuit Fail Safe Flow-Through Pin Out Packaged in Thin Shrink Small-Outline Package With 20-mil Terminal Pitch NOT RECOMMENDED FOR NEW DESIGNS For Replacement Use ’LVDx388A ’LVDS388, ’LVDT388 DBT PACKAGE (TOP VIEW) A1A A1B A2A A2B NC B1A B1B B2A B2B NC C1A C1B C2A C2B NC D1A D1B D2A D2B description The ‘LVDS388 and ‘LVDT388 (T designates integrated termination) are eight differential line receivers that implement the electrical characteristics of low-voltage differential signaling (LVDS). This signaling technique lowers the output voltage levels of 5-V differential standard levels (such as EIA/TIA-422B) to reduce the power, increase the switching speeds, and allow operation with a 3-V supply rail. Any of the eight differential receivers will provide a valid logical output state with a +100-mV differential input voltage within the input common-mode voltage range. The input common-mode voltage range allows 1 V of ground potential difference between two LVDS nodes. Additionally, the high-speed switching of LVDS signals always require the use of a line impedance matching resistor at the receiving end of the cable or transmission media. The LVDT product eliminates this external resistor by integrating it with the receiver. 1 38 2 37 3 36 4 35 5 34 6 33 7 32 8 31 9 30 10 29 11 28 12 27 13 26 14 25 15 24 16 23 17 22 18 21 19 20 GND VCC ENA A1Y A2Y ENB B1Y B2Y GND VCC GND C1Y C2Y ENC D1Y D2Y END VCC GND logic diagram (positive logic) ’LVDx388 ’LVDT388 ONLY 1A 1Y 1B EN 2A 2Y 2B (1/4 of ’LVDx388 shown) Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. † Signaling rate, 1/t, where t is the minimum unit interval and is expressed in the units bits/s (bits per second) Copyright 2001, Texas Instruments Incorporated PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 1 SN65LVDS388, SN65LVDT388, SN75LVDS388, SN75LVDT388 HIGH-SPEED DIFFERENTIAL LINE RECEIVERS SLLS448A – SEPTEMBER 2000 – REVISED MAY 2001 description (continued) The intended application of this device and signaling technique is for point-to-point baseband data transmission over controlled impedance media of approximately 100 Ω. The transmission media may be printed-circuit board traces, backplanes, or cables. The large number of drivers integrated into the same substrate along with the low pulse skew of balanced signaling, allows extremely precise timing alignment of clock and data for synchronous parallel data transfers. When used with its companion, 8-channel driver, the SN65LVDS389 over 150 million data transfers per second in single-edge clocked systems are possible with very little power. Note: The ultimate rate and distance of data transfer is dependent upon the attenuation characteristics of the media, the noise coupling to the environment, and other system characteristics. The SN65LVDS388 and SN65LVDT388 is characterized for operation from –40°C to 85°C. The SN75LVDS388 and SN75LVDT388 is characterized for operation from 0°C to 70°C. AVAILABLE OPTIONS PART NUMBER TEMPERATURE RANGE NUMBER OF RECEIVERS BUS-PIN ESD SN65LVDS388DBT –40°C to 85°C 8 15 kV SN65LVDT388DBT –40°C to 85°C 8 15 kV SN75LVDS388DBT 0°C to 70°C 8 4 kV SN75LVDT388DBT 0°C to 70°C 8 4 kV Function Table SNx5LVD388 and SNx5LVDT388 DIFFERENTIAL INPUT ENABLES OUTPUT A-B EN Y VID ≥ 100 mV -100 mV < VID ≤ 100 mV H H H ? VID ≤ -100 mV X H L L Z Open H H H = high level, L = low level, X = irrelevant, Z = high impedance (off), ? = indeterminate equivalent input and output schematic diagrams VCC VCC 300 kΩ VCC 300 kΩ 400 Ω 5Ω EN Y Output A Input B Input 7V 7V 300 kΩ 7V 7V 110 Ω ’LVDT Devices Only 2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 SN65LVDS388, SN65LVDT388, SN75LVDS388, SN75LVDT388 HIGH-SPEED DIFFERENTIAL LINE RECEIVERS SLLS448A – SEPTEMBER 2000 – REVISED MAY 2001 absolute maximum ratings over operating free-air temperature (unless otherwise noted)† Supply voltage range, VCC (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.5 V to 4 V Voltage range: Enables or Y . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.5 V to 6 V A or B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.5 V to 4 V Electrostatic discharge: (see Note 2) SN65’ (A, B, and GND) . . . . . . . . . . . . . . . . . . . . . . . . . . . . Class 3, A:15 kV, B: 700 V SN75’ (A, B, and GND) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Class 2, A:4 kV, B: 400 V Continuous power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Dissipation Rating Table Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 65°C to 150°C Lead temperature 1,6 mm (1/16 in) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°C † Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. NOTES: 1. All voltage values, except differential I/O bus voltages, are with respect to network ground terminal. 2. Tested in accordance with MIL-STD-883C Method 3015.7. PACKAGE DISSIPATION RATING TABLE DERATING FACTOR‡ ABOVE TA = 25°C TA ≤ 25°C TA = 70°C POWER RATING TA = 85°C POWER RATING DBT 1071 mW 8.5 mW/°C 688 mW ‡ This is the inverse of the junction-to-ambient thermal resistance when board-mounted (low-k) and with no air flow. 556 mW recommended operating conditions MIN NOM 3 3.3 Supply voltage, VCC High-level input voltage, VIH Enables Low-level input voltage, VIL Enables MAX 3.6 2 Magnitude of differential input voltage, VID ID 2 Operating O erating free-air tem temperature erature, TA POST OFFICE BOX 655303 | 2.4 0.8 V 0.6 V * |V2ID| V °C °C SN75’ 0 VCC – 0.8 70 SN65’ – 40 85 • DALLAS, TEXAS 75265 V V 0.1 |V Common-mode input voltage, VIC (see Figure 4) UNIT 3 SN65LVDS388, SN65LVDT388, SN75LVDS388, SN75LVDT388 HIGH-SPEED DIFFERENTIAL LINE RECEIVERS SLLS448A – SEPTEMBER 2000 – REVISED MAY 2001 electrical characteristics over recommended operating conditions (unless otherwise noted) PARAMETER VIT+ VIT– VOH VOL ICC II TEST CONDITIONS Positive-going differential input voltage threshold See Figure 1 and Table 1 Negative-going differential input voltage threshold High-level output voltage IOH = –8 mA IOL = 8 mA Low-level output voltage Enabled, Supply current MIN TYP† No load ’LVDT VI = 0 V, other input open VI = 2.4 V, other input open VIB = 0.1 V, VIB = 2.3 V Input current (A or B inputs) mV IID Differential input current |IIA – IIB| ‘LVDS IID Differential input current (IIA – IIB) ‘LVDT VIA = 0.2 V, VIA = 2.4 V, VIB = 0 V, VIB = 2.2 V II(OFF) II(OFF) Power-off input current (A or B inputs) ‘LVDS VI = 2.4 V Power-off input current (A or B inputs) ‘LVDT VCC = 0 V, VCC = 0 V, IIH IIL High-level input current (enables) 0.4 V 50 70 mA 3 mA IOZ High impedance output current High-impedance CIN Input capacitance, A or B input to GND –40 1.5 12 ±2 µA 2.2 mA ±20 µA ±40 µA 10 µA 10 µA ±1 VO = 0 V VO = 3.6 V Z(t) Termination impedance † All typical values are at 25°C and with a 3.3-V supply. µA –2.4 VI = 2.4 V VID = 0.4 sin 2.5E09 t V VID = 0.4 sin 2.5E09 t V –20 –3 VIH = 2 V VIL = 0.8 V Low-level input current (enables) V 0.2 –13 –1.2 VIA = 0 V, VIA = 2.4 V, mV 3 Disabled VI = 0 V VI = 2.4 V UNIT 100 –100 2.4 ’LVDS MAX 10 5 88 µA pF 132 Ω switching characteristics over recommended operating conditions (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP† MAX UNIT tPLH tPHL Propagation delay time, low-to-high-level output 1 2.6 4 ns Propagation delay time, high-to-low-level output 1 2.5 4 ns tr tf Output signal rise time 500 800 1200 ps 500 800 1200 ps tsk(p) Pulse skew (|tPHL – tPLH|) 150 600 ps tsk(o) tsk(pp) Output skew‡ 100 400 ps 1 ns tPZH tPZL Propagation delay time, high-impedance-to-high-level output 7 15 ns 7 15 ns tPHZ tPLZ Propagation delay time, high-level-to-high-impedance output 7 15 ns 7 15 ns Output signal fall time See Figure 2 g Part-to-part skew§ Propagation delay time, high-impedance-to-low-level output See Figure 3 Propagation delay time, low-level-to-high-impedance output † All typical values are at 25°C and with a 3.3-V supply. ‡ tsk(o) is the magnitude of the time difference between the tPLH or tPHL of all drivers of a single device with all of their inputs connected together. § tsk(pp) is the magnitude of the difference in propagation delay times between any specified terminals of any two devices characterized in this data sheet when both devices operate with the same supply voltage, at the same temperature, and have the same test circuits. 4 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 SN65LVDS388, SN65LVDT388, SN75LVDS388, SN75LVDT388 HIGH-SPEED DIFFERENTIAL LINE RECEIVERS SLLS448A – SEPTEMBER 2000 – REVISED MAY 2001 PARAMETER MEASUREMENT INFORMATION A V IA ) VIB VID 2 R VIA B VIC VO VIB Figure 1. Voltage Definitions Table 1. Receiver Minimum and Maximum Input Threshold Test Voltages APPLIED VOLTAGES RESULTING DIFFERENTIAL INPUT VOLTAGE RESULTING COMMONMODE INPUT VOLTAGE VIA 1.25 V VIB 1.15 V VID 100 mV VIC 1.2 V 1.15 V 1.25 V –100 mV 1.2 V 2.4 V 2.3 V 100 mV 2.35 V 2.3 V 2.4 V –100 mV 2.35 V 0.1 V 0V 100 mV 0.05 V 0V 0.1 V –100 mV 0.05 V 1.5 V 0.9 V 600 mV 1.2 V 0.9 V 1.5 V –600 mV 1.2 V 2.4 V 1.8 V 600 mV 2.1 V 1.8 V 2.4 V –600 mV 2.1 V 0.6 V 0V 600 mV 0.3 V 0V 0.6 V –600 mV 0.3 V POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 5 SN65LVDS388, SN65LVDT388, SN75LVDS388, SN75LVDT388 HIGH-SPEED DIFFERENTIAL LINE RECEIVERS SLLS448A – SEPTEMBER 2000 – REVISED MAY 2001 PARAMETER MEASUREMENT INFORMATION VID VIA VIB CL 10 pF VO VIA 1.4 V VIB 1V VID 0.4 V 0V – 0.4 V tPHL VO tPLH VOH 80% 1.5 V 20% VOL tf tr NOTE: All input pulses are supplied by a generator having the following characteristics: tr or tf ≤ 1 ns, pulse repetition rate (PRR) = 50 Mpps, pulse width = 10 ± 0.2 ns. CL includes instrumentation and fixture capacitance within 0,06 m of the D.U.T. Figure 2. Timing Test Circuit and Wave Forms 6 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 SN65LVDS388, SN65LVDT388, SN75LVDS388, SN75LVDT388 HIGH-SPEED DIFFERENTIAL LINE RECEIVERS SLLS448A – SEPTEMBER 2000 – REVISED MAY 2001 PARAMETER MEASUREMENT INFORMATION 1.2 V B 500 Ω A Inputs EN CL 10 pF + – VO VTEST NOTE A: All input pulses are supplied by a generator having the following characteristics: tr or tf ≤ 1 ns, pulse repetition rate (PRR) = 0.5 Mpps, pulse width = 500 ± 10 ns. CL includes instrumentation and fixture capacitance within 0,06 m of the D.U.T. 2.5 V VTEST A 1V 2V 1.4 V EN 0.8 V tPZL tPLZ 2.5 V 1.4 V Y VOL +0.5 V VOL 0V VTEST A 1.4 V 2V EN 1.4 V 0.8 V tPZH Y tPHZ VOH 1.4 V VOH –0.5 V 0V Figure 3. Enable/Disable Time Test Circuit and Wave Forms POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 7 SN65LVDS388, SN65LVDT388, SN75LVDS388, SN75LVDT388 HIGH-SPEED DIFFERENTIAL LINE RECEIVERS SLLS448A – SEPTEMBER 2000 – REVISED MAY 2001 TYPICAL CHARACTERISTICS LVDx388 SUPPLY CURRENT vs SWITCHING FREQUENCY COMMON-MODE INPUT VOLTAGE vs DIFFERENTIAL INPUT VOLTAGE 200 2.5 180 Max at VCC = 3 V 2.0 160 I CC – Supply Current – mA VIC – Common-Mode Input Voltage – V Max at VCC > 3.15 V 1.5 1.0 VCC = 3.6 V 140 120 VCC = 3 V 100 80 VCC = 3.3 V 60 40 0.5 Minimum 20 0 0 0 0.1 0.2 0.3 0.4 0.5 0 0.6 20 40 60 Figure 4 Figure 5 LOW-LEVEL OUTPUT VOLTAGE vs LOW-LEVEL OUTPUT CURRENT 4.0 5.0 3.5 4.5 VOL – Low-Level Output Voltage – V VOH – High-Level Output Voltage – V HIGH-LEVEL OUTPUT VOLTAGE vs HIGH-LEVEL OUTPUT CURRENT 3.0 2.5 2.0 1.5 1.0 0.5 0 –70 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 –60 –50 –40 –30 –20 –10 0 IOH – High-Level Output Current – mA 0 0 10 20 30 40 Figure 7 POST OFFICE BOX 655303 50 60 IOL – Low-Level Output Current – mA Figure 6 8 80 100 120 140 160 180 200 f – Switching Frequency – MHz |VID| – Differential Input Voltage – V • DALLAS, TEXAS 75265 70 80 SN65LVDS388, SN65LVDT388, SN75LVDS388, SN75LVDT388 HIGH-SPEED DIFFERENTIAL LINE RECEIVERS SLLS448A – SEPTEMBER 2000 – REVISED MAY 2001 TYPICAL CHARACTERISTICS HIGH-TO-LOW PROPAGATION DELAY TIME vs FREE-AIR TEMPERATURE 3.0 t PHL – High-To-Low Propagation Delay Time – ns t PLH – Low-To-High Propagation Delay Time – ns LOW-TO-HIGH PROPAGATION DELAY TIME vs FREE-AIR TEMPERATURE 2.9 2.8 VCC = 3 V 2.7 2.6 VCC = 3.6 V 2.5 2.4 VCC = 3.3 V 2.3 2.2 2.1 2 –50 –30 –10 10 30 50 70 90 Ta – Free-Air Temperature – °C 3.0 2.9 2.8 2.7 2.6 2.5 VCC = 3 V VCC = 3.6 V 2.4 2.3 2.2 VCC = 3.3 V 2.1 2 –50 –30 –10 10 30 50 70 90 TA – Free-Air Temperature – °C Figure 8 Figure 9 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 9 SN65LVDS388, SN65LVDT388, SN75LVDS388, SN75LVDT388 HIGH-SPEED DIFFERENTIAL LINE RECEIVERS SLLS448A – SEPTEMBER 2000 – REVISED MAY 2001 APPLICATION INFORMATION Host Host Controller Power Balanced Interconnect Power Target T DBn DBn Target Controller T DBn–1 DBn–1 T DBn–2 DBn–2 T DBn–3 DBn–3 T DB2 DB2 T DB1 DB1 T DB0 DB0 T TX Clock RX Clock LVDx386, LVDx388, LVDx388A, or LVDx390 LVDS Drivers Indicates twisting of the conductors. Figure 10. Typical Application Schematic 10 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 Indicates the line termination T circuit. SN65LVDS388, SN65LVDT388, SN75LVDS388, SN75LVDT388 HIGH-SPEED DIFFERENTIAL LINE RECEIVERS SLLS448A – SEPTEMBER 2000 – REVISED MAY 2001 APPLICATION INFORMATION fail safe One of the most common problems with differential signaling applications is how the system responds when no differential voltage is present on the signal pair. The LVDS receiver is like most differential line receivers, in that its output logic state can be indeterminate when the differential input voltage is between –100 mV and 100 mV and within its recommended input common-mode voltage range. TI’s LVDS receiver is different in how it handles the open-input circuit situation, however. Open-circuit means that there is little or no input current to the receiver from the data line itself. This could be when the driver is in a high-impedance state or the cable is disconnected. When this occurs, the LVDS receiver will pull each line of the signal pair to near VCC through 300-kΩ resistors as shown in Figure 10. The fail-safe feature uses an AND gate with input voltage thresholds at about 2.3 V to detect this condition and force the output to a high-level regardless of the differential input voltage. VCC 300 kΩ 300 kΩ A Rt = 100 Ω (Typ) Y B VIT ≈ 2.3 V Figure 11. Open-Circuit Fail Safe of the LVDS Receiver It is only under these conditions that the output of the receiver will be valid with less than a 100-mV differential input voltage magnitude. The presence of the termination resistor, Rt, does not affect the fail-safe function as long as it is connected as shown in the figure. Other termination circuits may allow a dc current to ground that could defeat the pullup currents from the receiver and the fail-safe feature. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 11 SN65LVDS388, SN65LVDT388, SN75LVDS388, SN75LVDT388 HIGH-SPEED DIFFERENTIAL LINE RECEIVERS SLLS448A – SEPTEMBER 2000 – REVISED MAY 2001 MECHANICAL DATA DBT (R-PDSO-G**) PLASTIC SMALL-OUTLINE PACKAGE 30 PINS SHOWN 0,50 0,27 0,17 30 16 0,08 M 0,15 NOM 4,50 4,30 6,60 6,20 Gage Plane 0,25 1 15 0°– 8° 0,75 0,50 A Seating Plane 0,15 0,05 1,20 MAX PINS ** 0,10 28 30 38 44 50 A MAX 7,90 7,90 9,80 11,10 12,60 A MIN 7,70 7,70 9,60 10,90 12,40 DIM 4073252/D 09/97 NOTES: A. B. C. D. 12 All linear dimensions are in millimeters. This drawing is subject to change without notice. Body dimensions do not include mold flash or protrusion. Falls within JEDEC MO-153 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 PACKAGE OPTION ADDENDUM www.ti.com 13-Oct-2005 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Drawing Pins Package Eco Plan (2) Qty SN65LVDS388DBT NRND SM8 DBT 38 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR SN65LVDS388DBTR NRND SM8 DBT 38 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR SN65LVDT388DBT OBSOLETE SM8 DBT 38 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR SN65LVDT388DBTG4 ACTIVE SM8 DBT 38 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR SN65LVDT388DBTR OBSOLETE SM8 DBT 38 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR SN75LVDS388DBT NRND SM8 DBT 38 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR SN75LVDS388DBTR NRND SM8 DBT 38 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR SN75LVDT388DBT OBSOLETE SM8 DBT 38 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR SN75LVDT388DBTR OBSOLETE SM8 DBT 38 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR 50 Lead/Ball Finish MSL Peak Temp (3) (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) 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. 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. 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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