www.ti.com SLLS563C − JULY 2003 − REVISED APRIL 2005 FEATURES D Optimized for PROFIBUS Networks APPLICATIONS D Process Automation − Meets the Requirements of EN 50170 − Signaling Rates Up to 40 Mbps − Differential Output Exceeds 2.1 V (54 Ω Load) − Low Bus Capacitance: 10 pF (Max) − − − Chemical Production Brewing and Distillation Paper Mills D Factory Automation D D D D D Meets the Requirements of TIA/EIA-485-A ESD Protection Exceeds ±10 kV HBM Failsafe Receiver for Bus Open, Short, Idle Up to 160 Transceivers on a Bus D D D D Common-Mode Rejection Up to 50 MHz Short-Circuit Current Limit Hot Swap Capable Thermal Shutdown Protection − − − Automobile Production Rolling, Pressing, Stamping Machines Networked Sensors D General RS-485 Networks Low Skew During Output Transitions and Driver Enabling / Disabling − − − Motor/Motion Control HVAC and Building Automation Networks Networked Security Stations DESCRIPTION These devices are half-duplex differential transceivers, with characteristics optimized for use in PROFIBUS (EN 50170) applications. The driver output differential voltage exceeds the Profibus requirements of 2.1 V with a 54-Ω load. A signaling rate of up to 40 Mbps allows technology growth to high data transfer speeds. The low bus capacitance provides low signal distortion. The SN65HVD1176 and SN75HVD1176 meet or exceed the requirements of ANSI standard TIA/EIA-485-A (RS-485) for differential data transmission across twisted-pair networks. The driver outputs and receiver inputs are tied together to form a half-duplex bus port, with one-fifth unit load, allowing up to 160 nodes on a single bus. The receiver output stays at logic high when the bus lines are shorted, left open, or when no driver is active. The driver outputs are in high impedance when the supply voltage is below 2.5 V to prevent bus disturbance during power cycling or during live insertion to the bus. An internal current limit protects the transceiver bus pins in short-circuit fault conditions by limiting the output current to a constant value. Thermal shutdown circuitry protects the device against damage due to excessive power dissipation caused by faulty loading and drive conditions. The SN75HVD1176 is characterized for operation at temperatures from 0°C to 70°C. The SN65HVD1176 is characterized for operation at temperatures from −40°C to 85°C. D PACKAGE (TOP VIEW) R RE DE D 1 8 2 7 3 6 4 5 LOGIC DIAGRAM (POSITIVE LOGIC) A D VCC B A GND B DE RE R 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. ! "#$ ! %#&'" ($) (#"! " !%$""! %$ *$ $! $+! !#$! !(( ,-) (#" %"$!!. ($! $"$!!'- "'#($ $!. '' %$$!) Copyright 2003, Texas Instruments Incorporated www.ti.com SLLS563C − JULY 2003 − REVISED APRIL 2005 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. AVAILABLE OPTIONS TA 0°C to 70°C PACKAGED DEVICES(1) MARKED AS SN75HVD1176D VN1176 −40°C to 85°C SN65HVD1176D VP1176 (1) The D package is available taped and reeled. Add an R suffix to the device type (i.e., SN65HVD1176DR). ABSOLUTE MAXIMUM RATINGS over operating junction temperature range unless otherwise noted(1) SN65HVD1176, SN75HVD1176 Supply voltage(2), VCC −0.5 V to 7 V Voltage at any bus I/O terminal −9 V to 14 V Voltage input, transient pulse, A and B, (through 100 Ω, see Figure 14) −40 V to 40 V Voltage input at any D, DE or RE terminal −0.5 V to 7 V Receiver output current, IO Electrostatic discharge −10 mA to 10 mA Human Body Model, (HBM)(3) All pins 4 kV Bus terminals and GND 10 kV Junction temperature, TJ 150°C (1) 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. (2) All voltage values, except differential I/O bus voltages, are with respect to network ground terminal. (3) Tested in accordance with JEDEC standard 22. test method A114−A. RECOMMENDED OPERATING CONDITIONS MIN Supply voltage, VCC Voltage at either bus I/O terminal High−level input voltage, VIH Low−level input voltage, VIL Differential input voltage, VID Output current Junction temperature, TJ (1) 4.75 A, B MAX 5 5.25 UNIT −7 12 2 0 VCC 0.8 A with respect to B −12 12 Driver −70 70 −8 8 −40 130 Ω 0 130 Ω 40 Mbps D, DE, RE Receiver SN65HVD1176 SN75HVD1176 Differential load resistance, RL Signaling rate, 1/tU1 (1) See the Thermal Characteristics table for more information on maintenance of this requirement. 2 NOM V mA Ω 54 www.ti.com SLLS563C − JULY 2003 − REVISED APRIL 2005 DRIVER ELECTRICAL CHARACTERISTICS over recommended operating conditions (unless otherwise noted) PARAMETER VO Open-circuit output voltage A or B, VOD(SS) Steady-state differential output voltage magnitude RL = 54 Ω, See Figure 1 With common-mode loading, (VTEST from −7 V to 12 V) See Figure 2 ∆|VOD(SS)| Change in steady-state differential output voltage between logic states See Figure 1 and Figure 6 VOC(SS) Steady-state common-mode output voltage ∆VOC(SS) Change in steady-state common-mode output voltage VOC(PP) VOD(RING) Peak-to-peak common-mode output voltage II IO(OFF) Input current IOZ IOS(P) High impedance state output current IOS(SS) Steady-state short-circuit output current COD Differential output voltage over and under shoot Output current with power off MIN TYP(1) TEST CONDITIONS No load 0 See Figure 5 MAX UNIT VCC V 2.1 2.9 2.1 2.7 −0.2 0 0.2 V 2 2.5 3 V −0.2 0 0.2 V V 0.5 RL = 54 Ω, CL = 50 pF, See Figure 6 D, DE VCC < = 2.5 V DE at 0 V Peak short-circuit output current DE at VCC, See Figure 8 V 10% VOD(PP) 50 µA −50 See receiver line input current VOS = −7 V to 12 V VOS > 4 V, Output driving low VOS < 1 V, Output driving high Differential output capacitance −250 250 60 90 135 −135 −90 −60 mA mA See receiver CI (1) All typical values are at VCC = 5 V and 25°C. DRIVER SWITCHING CHARACTERISTICS over recommended operating conditions (unless otherwise noted) PARAMETER tPLH tPHL Propagation delay time low-level-to-high-level output tsk(p) tr Pulse skew | tPLH – tPHL | tf tt(MLH), tt(MHL) Differential output fall time Propagation delay time high-level-to-low-level output TEST CONDITIONS RL = 54 Ω, CL = 50 pF, See Figure 3 Differential output rise time Output transition skew MIN TYP MAX 4 7 10 ns 4 7 10 ns 0 2 ns 3 7.5 ns 2 2 See Figure 4 tp(AZH), tp(BZH) tp(AZL), tp(BZL) Propagation delay time, high-impedance-to-active output tp(AHZ), tp(BHZ) tp(ALZ), tp(BLZ) Propagation delay time, active-to- high-impedance output |tp(AZL) − tp(BZH)| |tp(AZH) − tp(BZL)| Enable skew time |tp(ALZ) − tp(BHZ)| |tp(AHZ) − tp(BLZ)| Disable skew time tp(AZH), tp(BZH) tp(AZL), tp(BZL) Propagation delay time, high-impedance-to-active output (from sleep mode) tp(AHZ), tp(BHZ) tp(ALZ), tp(BLZ) Propagation delay time, active-output-to high-impedance (to sleep mode) t(CFB) t(TSD) Time from application of short-circuit to current foldback See Figure 8 Time from application of short-circuit to thermal shutdown TA = 25°C, See Figure 8 RL = 110 Ω, CL = 50 pF, See Figure 7a and 7b UNIT 3 7.5 ns 0.2 1 ns 10 20 ns 10 20 ns 0.55 1.5 ns 2.5 ns 1 4 µs 30 50 ns RE at 0 V RE at 5 V 0.5 100 µs µs (1) All typical values are at VCC = 5 V and 25°C. 3 www.ti.com SLLS563C − JULY 2003 − REVISED APRIL 2005 RECEIVER ELECTRICAL CHARACTERISTICS over recommended operating conditions (unless otherwise noted) PARAMETER TEST CONDITIONS VIT(+) VIT(−) Positive-going differential input voltage threshold VHYS VOH Hysteresis voltage (VIT+ − VIT−) VOL IA, IB Low-level output voltage IA(OFF), IB(OFF) II Bus pin input current Receiver enable input current RE IOZ RI High-impedance -state output current RE = VCC Negative-going differential input voltage threshold High-level output voltage See Figure 9 VO = 2.4 V, IO = −8 mA VO = 0.4 V, IO = 8 mA VID = 200 mV, IOH = −8 mA, See Figure 9 VID = −200 mV, IOL = 8 mA, See Figure 9 VI = − 7 V to 12 V, Other input = 0 V MAX −80 −20 mV −200 −120 40 mV 4 4.6 V 0.2 0.4 V −160 200 µA −50 50 µA −1 1 µA VCC = 0V 60 Differential input capacitance Common mode rejection CMR (1) All typical values are at 25°C. UNIT VCC = 4.75 V to 5.25 V Input resistance CID MIN TYP(1) kΩ Test input signal is a 1.5 MHz sine wave with amplitude 1 Vpp, capacitance measured across A and B 7 See Figure 11 4 10 pF V RECEIVER SWITCHING CHARACTERISTICS over recommended operating conditions TEST CONDITIONS PARAMETER MIN TYP MAX tPLH tPHL Propagation delay time, low-to-high level output 20 25 Propagation delay time, high-to-low level output 20 25 tsk(p) tr Pulse skew | tPLH – tPHL | 1 2 Receiver output voltage rise time 2 4 tf tPZH Receiver output voltage fall time 2 4 tPHZ tPZL Propagation delay time, high-level-to-high-impedance output tPLZ tPZH Propagation delay time, low-level-to-high-impedance output tPHZ tPZL Propagation delay time, high-level-to-high-impedance output (active to standby) tPLZ Propagation delay time, low-level-to-high-impedance output (active to standby) See Figure 10 Propagation delay time, high-impedance-to-high-level output Propagation delay time, high-impedance-to-low-level output DE at VCC, See Figure 13 20 DE at VCC, See Figure 14 20 20 20 UNIT ns ns ns ns ns DE at 0 V, See Figure 12 1 4 µs 13 20 ns DE at 0 V See Figure 12 2 4 µs 13 20 ns TYP MAX 4 6 mA Driver only, RE at VCC, DE at VCC, All other inputs open, no load 3.8 6 mA Receiver only, RE at 0 V, DE at 0 V, All other inputs open, no load 3.6 6 mA Standby only, RE at VCC, DE at 0 V, All other inputs open 0.2 5 µA Propagation delay time, high-impedance-to-high-level output (standby to active) Propagation delay time, high-impedance-to-low-level output (standby to active) SUPPLY CURRENT over recommended operating conditions PARAMETER TEST CONDITIONS Driver and receiver, RE at 0 V, DE at VCC, All other inputs open, no load ICC 4 Supply current MIN UNIT www.ti.com SLLS563C − JULY 2003 − REVISED APRIL 2005 PARAMETER MEASUREMENT INFORMATION NOTES: Test load capacitance includes probe and jig capacitance (unless otherwise specified). Signal generator characteristics: rise and fall time < 6 ns, pulse rate 100 kHz, 50% duty cycle, Zo = 50 Ω (unless otherwise specified) A II IO 27 Ω VOD 0 V or 3 V 50 pF 27 Ω D B IO VOC Figure 1. Driver Test Circuit, VOD and VOC Without Common-Mode Loading 375 Ω A 60 Ω VOD 0 V or 3 V VTEST = −7 V to 12 V D 375 Ω B VTEST Figure 2. Driver Test Circuit, VOD With Common-Mode Loading 3V INPUT 0V RL = 54 Ω Signal Generator VOD CL = 50 pF 50 Ω 90% VOD(H) 10% VOD(L) OUTPUT tr tf Figure 3. Driver Switching Test Circuit and Rise/Fall Time Measurement D 1.5 V 1.5 V tPLH tPHL A,B 50% A tt(MLH) B 50% tt(MHL) 50% 50% Figure 4. Driver Switching Waveforms for Propagation Delay and Output Midpoint Time Measurements 5 www.ti.com SLLS563C − JULY 2003 − REVISED APRIL 2005 27 Ω A VA D Signal Generator 50 Ω B 27 Ω ≈ 3.25 V VB 50 pF ≈ 1.75 V VOC(PP) VOC ∆VOC(SS) VOC Figure 5. Driver VOC Test Circuit and Waveforms VOD(SS) VOD(RING) VOD(PP) 0 V Differential VOD(RING) VOD(SS) NOTE: VOD(RING) is measured at four points on the output waveform, corresponding to overshoot and undershoot from the VOD(H) and VOD(L) steady state values. Figure 6. VOD(RING) Waveform and Definitions 3V DE RL = 110 Ω 0V D DE Signal Generator A B 50 Ω VCC CL = 50 pF RL = 110 Ω 1.5 V tp(AZL) tp(ALZ) A 0V 50% VOL +0.5 V tp(BHZ) tp(BZH) CL = 50 pF 50% B VOL −0.5 V a) D at Logic Low DE 3V 1.5 V 1.5 V RL = 110 Ω 0V 3V D DE Signal Generator A B CL = 50 pF tp(AZH) A VOH −0.5 V tp(BLZ) tp(BZL) CL = 50 pF B b) D at Logic High Figure 7. Driver Enable/Disable Test 6 50% RL = 110 Ω VCC 50 Ω tp(AHZ) 50% VOH +0.5 V www.ti.com SLLS563C − JULY 2003 − REVISED APRIL 2005 250 Output Current |mA| IOS D 135 VOS 60 Voltage Source time t(CFB) t(TSD) Figure 8. Driver Short-Circuit Test Circuit and Waveforms (Short Circuit applied at Time t = 0) IA VA VIC VA + VB 2 A R VID VB IO B VO IB Figure 9. Receiver DC Parameter Definitions Signal Generator 50 Ω Input B VID A B Signal Generator R IO Input A tPLH VO CL = 15 pF 50 Ω 1.5 V 50% Output 90% 1.5 V tr 0V tPHL VOH 10% V OL tf Figure 10. Receiver Switching Test Circuit and Waveforms 50 Ω 100 nF VI = A sin 2pft 1 MHz < f < 50 MHz 50 Ω A R 470 nF RE B DE 2.2 kΩ Voffset = −2 V to 7 V 2.2 kΩ VR Scope D Scope GND VCC 100 nF VR shall be greater than 2 V throughout this test. Figure 11. Receiver Common-Mode Rejection Test Circuit 7 www.ti.com SLLS563C − JULY 2003 − REVISED APRIL 2005 3V A 0 V or 1.5 V R B 1.5 V or 0 V VI S1 CL = 15 pF ±20% RE Input Generator A 1 kΩ ± 1% VO B 50 Ω 3V VI 1.5 V 0V tPZH(2) VOH A at 1.5 V B at 0 V S1 to B 1.5 V VO GND tPZL(2) 3V 1.5 V VO A at 0 V B at 1.5 V S1 to A VOL Figure 12. Receiver Enable Time From Standby (Driver Disabled) VCC VCC D DE A 54 Ω B 3V R RE Signal Generator 1 kΩ 0V RE 1.5 V 0V CL = 15 pF tPZH tPHZ 50 Ω R 1.5 V VOH VOH −0.5 V GND Figure 13. Receiver Enable Test Circuit and Waveforms, Data Output High (Driver Active) 8 www.ti.com SLLS563C − JULY 2003 − REVISED APRIL 2005 0V VCC D DE A 54 Ω B 3V 1 kΩ R 5V RE 1.5 V 0V CL = 15 pF RE tPZL Signal Generator tPLZ VCC 50 Ω R 1.5 V VOL +0.5 V VOL Figure 14. Receiver Enable Test Circuit and Waveforms, Data Output Low (Driver Active) 100 Ω VTEST 0V Pulse Generator, 15 µs Duration, 1% Duty Cycle 15 µs 1.5 ms −VTEST Figure 15. Test Circuit and Waveforms, Transient Over-Voltage Test 9 www.ti.com SLLS563C − JULY 2003 − REVISED APRIL 2005 DEVICE INFORMATION DRIVER FUNCTION TABLE INPUT ENABLE D DE A OUTPUTS H H H L L H L H X L Z Z X OPEN Z Z OPEN H H L B H = high level, L= low level, X = don’t care, Z = high impedance (off) RECEIVER FUNCTION TABLE DIFFERENTIAL INPUT ENABLE OUTPUT VID = (VA – VB) VID ≥ 0.02 V RE R L H −0.2 V < VID < −0.02 V L ? VID ≤ −0.2 V X L L H Z X OPEN Z Open circuit L H Short Circuit L H Idle (terminated) bus L H H = high level, L= low level, X = don’t care,Z = high impedance (off), ? = indeterminate THERMAL CHARACTERISTICS(1) over recommended operating conditions (unless otherwise noted) PARAMETERS θJA Junction-to-ambient thermal resistance(3) θJB θJC Junction-to-board thermal resistance PD MIN SN75HVD1176 Ambient air temperature SN65HVD1176 SN75HVD1176 MAX UNITS °C/W High-K board(5), no air flow 128.7 °C/W High-K board 77.6 °C/W 43.9 °C/W RL = 54 Ω, CL= 50 pF, 0 V to 3 V 15 MHz, 50% duty cycle square wave input, driver and receiver enabled Device power dissipation TYP(2) 208.3 Junction-to-case thermal resistance SN65HVD1176 TA TEST CONDITIONS Low-K board(4), no air flow 277 Low-K board, no air flow, PD = 318 mW −40 High-K board, no air flow, PD = 318 mW −40 0 0 318 mW 64 °C 89 °C TSD Thermal shut down junction temperature 150 °C (1) See Application Information section for an explanation of these parameters. (2) All typical values are with VCC = 5 V and TA = 25°C. (3) The intent of θJA specification is solely for a thermal performance comparison of one package to another in a standardized environment. This methodology is not meant to and will not predict the performance of a package in an application-specific environment. (4) JESD51−3, Low Effective Thermal Conductivity Test Board for Leaded Surface Mount Packages. (5) JESD51−7, High Effective Thermal Conductivity Test Board for Leaded Surface Mount Packages. 10 www.ti.com SLLS563C − JULY 2003 − REVISED APRIL 2005 EQUIVALENT INPUT AND OUTPUT SCHEMATIC DIAGRAMS D and RE Inputs DE Input VCC VCC 200 kΩ Input 500 Ω Input 500 Ω 200 kΩ 9V 9V A Input B Input VCC VCC 16 V 18 kΩ 16 V 18 kΩ 90 kΩ 90 kΩ Input Input 16 V 18 kΩ 16 V 18 kΩ A and B Outputs R Output VCC VCC 16 V 5Ω Output Output 9V 16 V 11 www.ti.com SLLS563C − JULY 2003 − REVISED APRIL 2005 TYPICAL CHARACTERISTICS DRIVER SUPPLY CURRENT vs SIGNALING RATE DIFFERENTIAL OUTPUT VOLTAGE vs LOAD CURRENT 66 5 VOD − Differential Output Voltage − V VCC = 5.25 V 4 I DD − Driver Supply Current − mArms VCC = 5 V 4.5 100 Ω 3.5 50 Ω 3 VCC = 4.75 V 2.5 2 1.5 1 64 62 60 VCC = 5 V TA = 25°C RL = 56 Ω, DE and RE at 5 V Input 0 V to 3 V PRBS See Figure 3 58 56 0.5 TA = 255C 0 0 54 20 40 60 IL − Load Current − mA 0 80 10 3.75 VCC = 4.75 V Driver Rise, Fall Time − ns Driver Output Transition Skew − ns 4 0.25 VCC = 5 V 0.15 VCC = 5.25 V 0.1 0.05 0 −40 RL = 54 Ω, CL = 50 pF See Figure 3 VCC = 4.75 V 3.5 3.25 VCC = 5 V 3 VCC = 5.25 V 2.75 2.5 2.25 −15 10 35 60 TA − Free-Air Temperature − °C Figure 18 12 50 DRIVER RISE, FALL TIME vs FREE-AIR TEMPERATURE RL = 54 Ω, CL = 50 pF See Figure 4 0.2 40 Figure 17 DRIVER OUTPUT TRANSITION SKEW vs FREE-AIR TEMPERATURE 0.3 30 Signaling Rate − Mbps Figure 16 0.35 20 85 2 −40 −15 10 35 60 TA − Free-Air Temperature − °C Figure 19 85 www.ti.com SLLS563C − JULY 2003 − REVISED APRIL 2005 DRIVER ENABLE SKEW vs FREE-AIR TEMPERATURE 0.7 VCC = 4.75 V Driver Enable Skew − ns 0.6 0.5 VCC = 5.25 V 0.4 VCC = 5 V 0.3 0.2 0.1 RL = 110 Ω, CL = 50 pF See Figure 7 0 −40 −15 10 35 60 TA − Free-Air Temperature − °C 85 Figure 20 APPLICATION INFORMATION THERMAL CHARACTERISTICS OF IC PACKAGES qJA (Junction-to-Ambient Thermal Resistance) is defined as the difference in junction temperature to ambient temperature divided by the operating power. θJA is not a constant and is a strong function of: D the PCB design (50% variation) D altitude (20% variation) D device power (5% variation) θJA can be used to compare the thermal performance of packages if the specific test conditions are defined and used. Standardized testing includes specification of PCB construction, test chamber volume, sensor locations, and the thermal characteristics of holding fixtures. θJA is often misused when it is used to calculate junction temperatures for other installations. TI uses two test PCBs as defined by JEDEC specifications. The low-k board gives average in-use condition thermal performance, and it consists of a single copper trace layer 25 mm long and 2-oz thick. The high-k board gives best case in-use condition, and it consists of two 1-oz buried power planes with a single copper trace layer 25 mm long and 2-oz thick. A 4% to 50% difference in θJA can be measured between these two test cards qJC (Junction-to-Case Thermal Resistance) is defined as difference in junction temperature to case divided by the operating power. It is measured by putting the mounted package up against a copper block cold plate to force heat to flow from die, through the mold compound into the copper block. θJC is a useful thermal characteristic when a heatsink is applied to package. It is not a useful characteristic to predict junction temperature because it provides pessimistic numbers if the case temperature is measured in a nonstandard system and junction temperatures are backed out. It can be used with θJB in 1-dimensional thermal simulation of a package system. 13 www.ti.com SLLS563C − JULY 2003 − REVISED APRIL 2005 qJB (Junction-to-Board Thermal Resistance) is defined as the difference in the junction temperature and the PCB temperature at the center of the package (closest to the die) when the PCB is clamped in a cold-plate structure. θJB is only defined for the high-k test card. θJB provides an overall thermal resistance between the die and the PCB. It includes a bit of the PCB thermal resistance (especially for BGA’s with thermal balls) and can be used for simple 1-dimensional network analysis of package system (see Figure 21). Ambient Node qCA Calculated Surface Node qJC Calculated/Measured Junction qJB Calculated/Measured PC Board Figure 21. Thermal Resistance 14 PACKAGE OPTION ADDENDUM www.ti.com 8-Aug-2005 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Drawing Pins Package Eco Plan (2) Qty SN65HVD1176D ACTIVE SOIC D 8 SN65HVD1176DR ACTIVE SOIC D 8 SN75HVD1176D ACTIVE SOIC D 8 SN75HVD1176DR ACTIVE SOIC D SN75HVD1176DRG4 ACTIVE SOIC D 75 Lead/Ball Finish MSL Peak Temp (3) Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM 8 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM 8 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM 75 (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. TI has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. 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