SCES506B − NOVEMBER 2003 − REVISED AUGUST 2004 D Available in the Texas Instruments D D D D D D D NanoStar and NanoFree Packages Low Static-Power Consumption; ICC = 0.9 µA Max Low Dynamic-Power Consumption; Cpd = 4.6 pF Typ at 3.3 V Low Input Capacitance; Ci = 1.5 pF Typ Low Noise − Overshoot and Undershoot <10% of VCC Ioff Supports Partial-Power-Down Mode Operation Includes Schmitt-Trigger Inputs Wide Operating VCC Range of 0.8 V to 3.6 V DBV OR DCK PACKAGE (TOP VIEW) B GND A 1 6 2 5 3 4 D Optimized for 3.3-V Operation D 3.6-V I/O Tolerant to Support Mixed-Mode Signal Operation D tpd = 5.3 ns Max at 3.3 V D Suitable for Point-to-Point Applications D Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II D ESD Performance Tested Per JESD 22 D − 2000-V Human-Body Model (A114-B, Class II) − 200-V Machine Model (A115-A) − 1000-V Charged-Device Model (C101) ESD Protection Exceeds ±5000 V With Human-Body Model YEP OR YZP PACKAGE (BOTTOM VIEW) A GND B C VCC Y 3 4 2 5 1 6 Y VCC C description /ordering information The AUP family is TI’s premier solution to the industry’s low-power needs in battery-powered portable applications. This family ensures a very low static- and dynamic-power consumption across the entire VCC range of 0.8 V to 3.6 V, resulting in increased battery life (see Figure 1). This product also maintains excellent signal integrity (see the very low undershoot and overshoot characteristics shown in Figure 2). Static-Power Consumption (µA) 100% 100% 80% 80% 40% 3 60% 3.3-V Logic† 3.3-V Logic LVC † 40% AUP 0% 2.5 Input 2 Output 1.5 1 0.5 20% 20% 0% 3.5 Voltage − V 60% Switching Characteristics at 25 MHz† Dynamic-Power Consumption (pF) AUP † Single, dual, and triple gates Figure 1. AUP − The Lowest-Power Family 0 −0.5 20 25 30 Time − ns † AUP1G08 data at CL = 15 pF 0 5 10 15 35 40 45 Figure 2. Excellent Signal Integrity The SN74AUP1G98 features configurable multiple functions. The output state is determined by eight patterns of 3-bit input. The user can choose the logic functions MUX, AND, OR, NAND, NOR, inverter, and noninverter. All inputs can be connected to VCC or GND. The device functions as an independent gate with Schmitt-trigger inputs, which allow for slow input transition and better switching-noise immunity at the input. 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. NanoStar and NanoFree are trademarks of Texas Instruments. Copyright 2004, Texas Instruments Incorporated ! " #$%! " &$'(#! )!%* )$#!" # ! "&%##!" &% !+% !%" %," "!$%!" "!)) -!.* )$#! &#%""/ )%" ! %#%""(. #($)% !%"!/ (( &%!%"* POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 1 SCES506B − NOVEMBER 2003 − REVISED AUGUST 2004 description/ordering information (continued) NanoStar and NanoFree package technology is a major breakthrough in IC packaging concepts, using the die as the package. This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down. ORDERING INFORMATION ORDERABLE PART NUMBER PACKAGE† TA −40°C to 85°C TOP-SIDE MARKING‡ NanoStar − WCSP (DSBGA) 0.23-mm Large Bump − YEP Tape and reel SN74AUP1G98YEPR NanoFree − WCSP (DSBGA) 0.23-mm Large Bump − YZP (Pb-free) Tape and reel SN74AUP1G98YZPR SOT (SOT-23) − DBV Tape and reel SN74AUP1G98DBVR H98_ SOT (SC-70) − DCK Tape and reel SN74AUP1G98DCKR HR_ _ _ _HR_ † Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at www.ti.com/sc/package. ‡ DBV/DCK: The actual top-side marking has one additional character that designates the assembly/test site. YEP/YZP: The actual top-side marking has three preceding characters to denote year, month, and sequence code, and one following character to designate the assembly/test site. Pin 1 identifier indicates solder-bump composition (1 = SnPb, • = Pb-free). FUNCTION TABLE INPUTS C B A OUTPUT Y L L L H L L H H L H L L L H H L H L L H H L H L H H L H H H H L logic diagram (positive logic) A 3 4 B C 2 1 6 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 Y SCES506B − NOVEMBER 2003 − REVISED AUGUST 2004 FUNCTION SELECTION TABLE FIGURE NO. LOGIC FUNCTION 2-to-1 data selector with inverted output 3 2-input NAND gate 4 2-input NOR gate with one inverted input 5 2-input AND gate with one inverted input 5 2-input NAND gate with one inverted input 6 2-input OR gate with one inverted input 6 2-input NOR gate 7 Noninverted buffer 8 Inverter 9 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 3 SCES506B − NOVEMBER 2003 − REVISED AUGUST 2004 logic configurations VCC VCC C B B Y A A 1 6 2 5 3 4 C C Y A A Y GND 1 6 2 5 3 4 C Y GND Figure 3. 2-to-1 Data Selector With Inverted Output When C is L, Y = B When C is H, Y = A Figure 4. 2-Input NAND Gate VCC C VCC C Y C Y B A Y A A 1 6 2 5 3 4 B C C Y Y B 1 6 2 5 3 4 C Y GND GND Figure 6. 2-Input NAND Gate With One Inverted Input 2-Input OR Gate With One Inverted Input Figure 5. 2-Input NOR Gate With One Inverted Input 2-Input AND Gate With One Inverted Input VCC VCC C B Y B 1 6 2 5 3 4 C C Y Y 1 6 2 5 3 4 GND GND Figure 8. Noninverted Buffer Figure 7. 2-Input NOR Gate VCC B B Y 1 6 2 5 3 4 Y GND Figure 9. Inverter 4 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 C Y SCES506B − NOVEMBER 2003 − REVISED AUGUST 2004 absolute maximum ratings over operating free-air temperature range (unless otherwise noted)† Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to 4.6 V Input voltage range, VI (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to 4.6 V Voltage range applied to any output in the high-impedance or power-off state, VO (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to 4.6 V Output voltage range in the high or low state, VO (see Note 1) . . . . . . . . . . . . . . . . . . . −0.5 V to VCC + 0.5 V Input clamp current, IIK (VI < 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −50 mA Output clamp current, IOK (VO < 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −50 mA Continuous output current, IO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA Continuous current through VCC or GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±50 mA Package thermal impedance, θJA (see Note 2): DBV package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165°C/W DCK package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 259°C/W YEP/YZP package . . . . . . . . . . . . . . . . . . . . . . . . . . . 123°C/W Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65°C to 150°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. The input negative-voltage and output voltage ratings may be exceeded if the input and output current ratings are observed. 2. The package thermal impedance is calculated in accordance with JESD 51-7. recommended operating conditions (see Note 3) VCC VI Supply voltage VO Output voltage Input voltage VCC = 0.8 V VCC = 1.1 V IOH IOL ∆t/∆v High-level output current Low-level output current Input transition rise or fall rate MIN MAX 0.8 3.6 UNIT V 0 3.6 V 0 VCC −20 µA V −1.1 VCC = 1.4 V VCC = 1.65 −1.7 VCC = 2.3 V VCC = 3 V −3.1 VCC = 0.8 V VCC = 1.1 V 20 −1.9 mA −4 µA 1.1 VCC = 1.4 V VCC = 1.65 V 1.7 VCC = 2.3 V VCC = 3 V 3.1 VCC = 0.8 V to 3.6 V 200 1.9 mA 4 ns/V TA Operating free-air temperature −40 85 °C NOTE 3: All unused inputs of the device must be held at VCC or GND to ensure proper device operation. Refer to the TI application report, Implications of Slow or Floating CMOS Inputs, literature number SCBA004. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 5 SCES506B − NOVEMBER 2003 − REVISED AUGUST 2004 electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS VCC VT+ Positive-going input threshold voltage VT− Negative-going input threshold voltage ∆V VT Hysteresis (VT+ − VT−) VOH 0.3 0.6 0.3 0.9 0.53 0.9 1.4 V 0.74 1.11 0.74 1.11 1.65 V 0.91 1.29 0.91 1.29 2.3 V 1.37 1.77 1.37 1.77 3V 1.88 2.29 1.88 2.29 0.1 0.6 0.1 0.6 1.1 V 0.26 0.65 0.26 0.65 1.4 V 0.39 0.75 0.39 0.75 1.65 V 0.47 0.84 0.47 0.84 2.3 V 0.69 1.04 0.69 1.04 1.24 3V 0.88 1.24 0.88 0.8 V 0.07 0.5 0.07 0.5 1.1 V 0.08 0.46 0.08 0.46 1.4 V 0.18 0.56 0.18 0.56 1.65 V 0.27 0.66 0.27 0.66 2.3 V 0.53 0.92 0.53 0.92 0.79 1.31 0.79 1.31 VOL ∆Ioff ICC † 6 1.03 1.3 2.05 1.97 1.9 1.85 2.72 2.67 2.6 0.1 0.3 × VCC 1.4 V 0.31 0.37 1.65 V 0.31 0.35 0.31 0.33 0.44 0.45 0.31 0.33 3V V 2.55 0.3 × VCC 2.3 V V V 1.1 V IOL = 2.3 mA IOL = 3.1 mA All inputs 1.11 1.32 0.1 IOL = 2.7 mA IOL = 4 mA II Ioff 1.4 V 0.8 V to 3.6 V IOL = 1.7 mA IOL = 1.9 mA V VCC − 0.1 0.7 × VCC 1.65 V 3V IOL = 20 µA IOL = 1.1 mA VCC − 0.1 0.75 × VCC UNIT 0.6 0.8 V 2.3 V IOH = −2.7 mA IOH = −4 mA TA = −40°C TO 85°C MIN MAX 0.53 1.1 V IOH = −2.3 mA IOH = −3.1 mA MAX 1.1 V 0.8 V to 3.6 V IOH = −1.7 mA IOH = −1.9 mA TA = 25°C TYP 0.8 V 3V IOH = −20 µA IOH = −1.1 mA MIN V 0.44 0.45 VI = GND to 3.6 V VI or VO = 0 V to 3.6 V 0 V to 3.6 V 0.1 0.5 µA 0V 0.2 0.6 µA VI or VO = 0 V to 3.6 V VI = GND or IO = 0 (VCC to 3.6 V) 0 V to 0.2 V 0.2 0.6 µA 0.8 V to 3.6 V 0.5 0.9 µA 40 50 µA ∆ICC VI = VCC − 0.6 V† IO = 0 One input at VCC − 0.6 V, other inputs at VCC or GND 3.3 V POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 SCES506B − NOVEMBER 2003 − REVISED AUGUST 2004 electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) (continued) PARAMETER TEST CONDITIONS Ci VI = VCC or GND Co VO = GND VCC MIN TA = 25°C TYP 0V 1.5 3.6 V 1.5 0V 3 TA = −40°C TO 85°C MIN MAX MAX UNIT pF pF switching characteristics over recommended operating free-air temperature range, CL = 5 pF (unless otherwise noted) (see Figures 10 and 11) PARAMETER FROM (INPUT) TO (OUTPUT) MIN 0.8 V tpd A, B, or C Y TA = −40°C TO 85°C TA = 25°C VCC TYP MAX MIN UNIT MAX 22.2 1.2 V ± 0.1 V 2.7 9.1 13.6 2.2 17 1.5 V ± 0.1 V 2 6.4 9.2 1.5 11.1 1.8 V ± 0.15 V 1.4 5.2 7.2 0.9 8.9 2.5 V ± 0.2 V 1.2 3.8 5.3 0.7 6.3 3.3 V ± 0.3 V 1 3.1 4.5 0.5 5.3 ns switching characteristics over recommended operating free-air temperature range, CL = 10 pF (unless otherwise noted) (see Figures 10 and 11) PARAMETER FROM (INPUT) TO (OUTPUT) MIN 0.8 V 1.2 V ± 0.1 V tpd A, B, or C Y TA = −40°C TO 85°C TA = 25°C VCC TYP UNIT MAX MIN MAX 25.4 5.2 10.4 15.4 4.7 19 1.5 V ± 0.1 V 4 7.4 10.5 3.5 12.6 1.8 V ± 0.15 V 3.1 6 8.3 2.6 10.2 2.5 V ± 0.2 V 2.7 4.5 6.1 2.2 7.3 3.3 V ± 0.3 V 2.5 3.7 5 2 6 ns switching characteristics over recommended operating free-air temperature range, CL = 15 pF (unless otherwise noted) (see Figures 10 and 11) PARAMETER FROM (INPUT) TO (OUTPUT) MIN 0.8 V tpd A, B, or C Y POST OFFICE BOX 655303 TA = −40°C TO 85°C TA = 25°C VCC TYP MAX MIN MAX 28.7 1.2 V ± 0.1 V 3.7 11.5 17 3.2 21.1 1.5 V ± 0.1 V 2.8 8.3 11.6 2.3 14 1.8 V ± 0.15 V 2.1 6.7 9.2 1.6 11.3 2.5 V ± 0.2 V 1.8 5 6.7 1.3 8.1 3.3 V ± 0.3 V 1.6 4.1 5.5 1.1 6.6 • DALLAS, TEXAS 75265 UNIT ns 7 SCES506B − NOVEMBER 2003 − REVISED AUGUST 2004 switching characteristics over recommended operating free-air temperature range, CL = 30 pF (unless otherwise noted) (see Figures 10 and 11) PARAMETER FROM (INPUT) TO (OUTPUT) MIN 0.8 V tpd A, B, or C Y TA = −40°C TO 85°C TA = 25°C VCC TYP UNIT MAX MIN MAX 39.7 1.2 V ± 0.1 V 5.1 15.3 21.6 4.6 26.8 1.5 V ± 0.1 V 3.9 10.9 14.6 3.4 17.6 1.8 V ± 0.15 V 3.1 8.9 11.5 2.6 14.1 2.5 V ± 0.2 V 2.6 6.7 8.4 2.1 10.1 3.3 V ± 0.3 V 2.3 5.5 6.9 1.8 8.3 ns operating characteristics, TA = 25°C PARAMETER Cpd 8 TEST CONDITIONS Power dissipation capacitance f = 10 MHz POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 VCC 0.8 V TYP UNIT 4 1.2 V ± 0.1 V 4 1.5 V ± 0.1 V 4 1.8 V ± 0.15 V 4 2.5 V ± 0.2 V 4.3 3.3 V ± 0.3 V 4.6 pF SCES506B − NOVEMBER 2003 − REVISED AUGUST 2004 PARAMETER MEASUREMENT INFORMATION (Propagation Delays, Setup and Hold Times, and Pulse Duration) From Output Under Test CL (see Note A) 1 MΩ LOAD CIRCUIT CL VM VI VCC = 0.8 V VCC = 1.2 V ± 0.1 V VCC = 1.5 V ± 0.1 V VCC = 1.8 V ± 0.15 V VCC = 2.5 V ± 0.2 V VCC = 3.3 V ± 0.3 V 5, 10, 15, 30 pF VCC/2 VCC 5, 10, 15, 30 pF VCC/2 VCC 5, 10, 15, 30 pF VCC/2 VCC 5, 10, 15, 30 pF VCC/2 VCC 5, 10, 15, 30 pF VCC/2 VCC 5, 10, 15, 30 pF VCC/2 VCC tw VCC Input VCC/2 VCC/2 VI VM Input 0V VM VOLTAGE WAVEFORMS PULSE DURATION 0V tPLH tPHL VOH VM Output VM VOL tPHL VCC Timing Input 0V tPLH tsu VOH VM Output th VCC VM VOL Data Input VCC/2 VCC/2 0V VOLTAGE WAVEFORMS PROPAGATION DELAY TIMES INVERTING AND NONINVERTING OUTPUTS NOTES: A. B. C. D. E. VCC/2 VOLTAGE WAVEFORMS SETUP AND HOLD TIMES CL includes probe and jig capacitance. All input pulses are supplied by generators having the following characteristics: PRR ≤ 10 MHz, ZO = 50 Ω, slew rate ≥ 1 V/ns. The outputs are measured one at a time, with one transition per measurement. tPLH and tPHL are the same as tpd. All parameters and waveforms are not applicable to all devices. Figure 10. Load Circuit and Voltage Waveforms POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 9 SCES506B − NOVEMBER 2003 − REVISED AUGUST 2004 PARAMETER MEASUREMENT INFORMATION (Enable and Disable Times) 2 × VCC 5 kΩ From Output Under Test CL (see Note A) S1 GND 5 kΩ TEST S1 tPLZ/tPZL tPHZ/tPZH 2 × VCC GND LOAD CIRCUIT CL VM VI V∆ VCC = 0.8 V VCC = 1.2 V ± 0.1 V VCC = 1.5 V ± 0.1 V VCC = 1.8 V ± 0.15 V VCC = 2.5 V ± 0.2 V VCC = 3.3 V ± 0.3 V 5, 10, 15, 30 pF VCC/2 VCC 0.1 V 5, 10, 15, 30 pF VCC/2 VCC 0.1 V 5, 10, 15, 30 pF VCC/2 VCC 0.1 V 5, 10, 15, 30 pF VCC/2 VCC 0.15 V 5, 10, 15, 30 pF VCC/2 VCC 0.15 V 5, 10, 15, 30 pF VCC/2 VCC 0.3 V VCC Output Control Output Waveform 1 S1 at 2 × VCC (see Note B) VCC/2 VCC/2 0V tPLZ tPZL VCC VCC/2 VOL tPHZ tPZH Output Waveform 2 S1 at GND (see Note B) VOL + V∆ VCC/2 VOH − V∆ VOH ≈0 V VOLTAGE WAVEFORMS ENABLE AND DISABLE TIMES LOW- AND HIGH-LEVEL ENABLING NOTES: A. CL includes probe and jig capacitance. B. Waveform 1 is for an output with internal conditions such that the output is low, except when disabled by the output control. Waveform 2 is for an output with internal conditions such that the output is high, except when disabled by the output control. C. All input pulses are supplied by generators having the following characteristics: PRR ≤ 10 MHz, ZO = 50 Ω, slew rate ≥ 1 V/ns. D. The outputs are measured one at a time, with one transition per measurement. E. tPLZ and tPHZ are the same as tdis. F. tPZL and tPZH are the same as ten. G. All parameters and waveforms are not applicable to all devices. Figure 11. Load Circuit and Voltage Waveforms 10 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 PACKAGE OPTION ADDENDUM www.ti.com 25-Feb-2005 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Drawing Pins Package Eco Plan (2) Qty SN74AUP1G98DBVR ACTIVE SOT-23 DBV 6 3000 Pb-Free (RoHS) CU NIPDAU Level-1-260C-UNLIM SN74AUP1G98DBVT ACTIVE SOT-23 DBV 6 250 Pb-Free (RoHS) CU NIPDAU Level-1-260C-UNLIM SN74AUP1G98DCKR ACTIVE SC70 DCK 6 3000 Pb-Free (RoHS) CU NIPDAU Level-1-260C-UNLIM SN74AUP1G98DCKT ACTIVE SC70 DCK 6 250 Pb-Free (RoHS) CU NIPDAU Level-1-260C-UNLIM SN74AUP1G98YEPR ACTIVE WCSP YEP 6 3000 None SNPB Level-1-260C-UNLIM SN74AUP1G98YZPR ACTIVE WCSP YZP 6 3000 Pb-Free (RoHS) SNAGCU Level-1-260C-UNLIM 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 - May not be currently available - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. None: Not yet available Lead (Pb-Free). 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" and in addition, uses package materials that do not contain halogens, including bromine (Br) or antimony (Sb) above 0.1% of total product weight. (3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDECindustry 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. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release. In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis. Addendum-Page 1 MECHANICAL DATA MPDS114 – FEBRUARY 2002 DCK (R-PDSO-G6) PLASTIC SMALL-OUTLINE PACKAGE 0,30 0,15 0,65 6 0,10 M 4 1,40 1,10 1 0,13 NOM 2,40 1,80 3 Gage Plane 2,15 1,85 0,15 0°–8° 0,46 0,26 Seating Plane 1,10 0,80 0,10 0,00 0,10 4093553-3/D 01/02 NOTES: A. B. C. D. All linear dimensions are in millimeters. This drawing is subject to change without notice. Body dimensions do not include mold flash or protrusion. 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