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Low-Voltage Logic (Lvc) LVC CHARACTERIZATION INFORMATION 1 LVC COMPARISON TO OTHER LOWĆVOLTAGE LOGIC FAMILIES 2 LVC AND 5ĆV TOLERANCE A 5ĆV TOLERANT LVC - RELEASED DEVICES B FREQUENTLY ASKED QUESTIONS C TI'S LOWĆVOLTAGE PORTFOLIO D ADVANCED PACKAGING E 3 LVC CHARACTERIZATION INFORMATION 1 LVC COMPARISON TO OTHER LOWĆVOLTAGE LOGIC FAMILIES 2 LVC AND 5ĆV TOLERANCE A 5ĆV TOLERANT LVC - RELEASED DEVICES B FREQUENTLY ASKED QUESTIONS C TI'S LOWĆVOLTAGE PORTFOLIO D ADVANCED PACKAGING E 1–1 3 1–2 LVC CHARACTERIZATION INFORMATION 1 LVC COMPARISON TO OTHER LOWĆVOLTAGE LOGIC FAMILIES 2 LVC AND 5ĆV TOLERANCE A 5ĆV TOLERANT LVC - RELEASED DEVICES B FREQUENTLY ASKED QUESTIONS C TI'S LOWĆVOLTAGE PORTFOLIO D ADVANCED PACKAGING E 2–1 3 2–2 LVC CHARACTERIZATION INFORMATION 1 LVC COMPARISON TO OTHER LOWĆVOLTAGE LOGIC FAMILIES 2 LVC AND 5ĆV TOLERANCE A 5ĆV TOLERANT LVC - RELEASED DEVICES B FREQUENTLY ASKED QUESTIONS C TI'S LOWĆVOLTAGE PORTFOLIO D ADVANCED PACKAGING E A–1 3 A–2 LVC CHARACTERIZATION INFORMATION 1 LVC COMPARISON TO OTHER LOWĆVOLTAGE LOGIC FAMILIES 2 LVC AND 5ĆV TOLERANCE A 5ĆV TOLERANT LVC - RELEASED DEVICES B FREQUENTLY ASKED QUESTIONS C TI'S LOWĆVOLTAGE PORTFOLIO D ADVANCED PACKAGING E B–1 3 B–2 LVC CHARACTERIZATION INFORMATION 1 LVC COMPARISON TO OTHER LOWĆVOLTAGE LOGIC FAMILIES 2 LVC AND 5ĆV TOLERANCE A 5ĆV TOLERANT LVC - RELEASED DEVICES B FREQUENTLY ASKED QUESTIONS C TI'S LOWĆVOLTAGE PORTFOLIO D ADVANCED PACKAGING E C–1 3 C–2 LVC CHARACTERIZATION INFORMATION 1 LVC COMPARISON TO OTHER LOWĆVOLTAGE LOGIC FAMILIES 2 LVC AND 5ĆV TOLERANCE A 5ĆV TOLERANT LVC - RELEASED DEVICES B FREQUENTLY ASKED QUESTIONS C TI'S LOWĆVOLTAGE PORTFOLIO D ADVANCED PACKAGING E D–1 3 D–2 LVC CHARACTERIZATION INFORMATION 1 LVC COMPARISON TO OTHER LOWĆVOLTAGE LOGIC FAMILIES 2 LVC AND 5ĆV TOLERANCE A 5ĆV TOLERANT LVC - RELEASED DEVICES B FREQUENTLY ASKED QUESTIONS C TI'S LOWĆVOLTAGE PORTFOLIO D ADVANCED PACKAGING E E–1 3 E–2 LVC DESIGNER'S GUIDE SCBA010 September 1996 Printed on Recycled Paper IMPORTANT NOTICE Texas Instruments (TI) reserves the right to make changes to its products or to discontinue any semiconductor product or service without notice, and advises its customers to obtain the latest version of relevant information to verify, before placing orders, that the information being relied on is current. TI warrants performance of its semiconductor products and related software to the specifications applicable at the time of sale in accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent TI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily performed, except those mandated by government requirements. Certain applications using semiconductor products may involve potential risks of death, personal injury, or severe property or environmental damage (“Critical Applications”). TI SEMICONDUCTOR PRODUCTS ARE NOT DESIGNED, INTENDED, AUTHORIZED, OR WARRANTED TO BE SUITABLE FOR USE IN LIFE-SUPPORT APPLICATIONS, DEVICES OR SYSTEMS OR OTHER CRITICAL APPLICATIONS. Inclusion of TI products in such applications is understood to be fully at the risk of the customer. Use of TI products in such applications requires the written approval of an appropriate TI officer. Questions concerning potential risk applications should be directed to TI through a local SC sales office. In order to minimize risks associated with the customer’s applications, adequate design and operating safeguards should be provided by the customer to minimize inherent or procedural hazards. TI assumes no liability for applications assistance, customer product design, software performance, or infringement of patents or services described herein. Nor does TI warrant or represent that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other intellectual property right of TI covering or relating to any combination, machine, or process in which such semiconductor products or services might be or are used. Copyright 1996, Texas Instruments Incorporated INTRODUCTION Low-voltage logic . Texas Instruments (TI) invented it. Since 1992, TI has been committed to leading the electronics industry down the voltage curve. With the introduction of the LVT device family, TI began the move toward faster speeds, lower power dissipation, and smaller end equipment. TI followed with LVC, LV, and ALVC. No other company has a broader, more complete line of 3.3-V logic devices. No matter what your performance needs, TI has a device family specifically designed for you. It is no wonder TI is the world’s leading 3.3-V logic manufacturer. 1H96 3.3-V Logic Market Shares 50% 40% 30% 20% 10% 0% TI Philips FCLD IDT Toshiba Motorola QSC Other (NSC) TI: No. 1 in Low-Voltage Logic Source: Insight Onsite v TI has a full range of low-voltage (3.3-V) logic products. In fact, TI is the only logic manufacturer with a 3.3-V logic device family at every price/performance node (see Appendix D). Lately, there has been much interest in LVC, the 5-V tolerant logic device family designed for medium performance needs (speed = 6.5 ns and drive = 24 mA). This designer’s guide was created to answer customers’ questions. Section 1 contains general characterization information about LVC. Section 2 contains data from direct-comparison tests conducted by TI’s Advanced System Logic group. Appendices A–E include complete listings of the fully 5-V tolerant LVC device family, a list of frequently asked questions, and packaging information. 64 LVT – Drive mA OL I 24 ALVC LVC 12 8 LV 5101520 Performance – max tpd – ns TI Low-Voltage Offerings vi TABLE OF CONTENTS SECTION 1 - LVC CHARACTERIZATION INFORMATION............................... 1-1 SECTION 2 - LVC COMPARISON TO OTHER LOWĆVOLTAGE LOGIC FAMILIES........ 2-1 APPENDIX A ............................................................................. A-1 LVC AND 5-V TOLERANCE . A–3 APPENDIX B ............................................................................. B-1 5-V TOLERANT LVC – RELEASED DEVICES. B–3 APPENDIX C ............................................................................. C-1 FREQUENTLY ASKED QUESTIONS. C–3 APPENDIX D ............................................................................. D-1 TI’S LOW-VOLTAGE PORTFOLIO. D–3 APPENDIX E ............................................................................. E-1 ADVANCED PACKAGING . E–3 vii viii SECTION 1 LVC CHARACTERIZATION INFORMATION THE CASE FOR LOW VOLTAGE......................................................... 1-5 CONSIDERATIONS FOR INTERFACING TO 5ĆV LOGIC................................. 1-7 Case 1 . 1–9 Case 2 . 1–9 Case 3 . 1–9 Case 4 . 1–9 AC PERFORMANCE .................................................................... 1-11 POWER CONSIDERATIONS............................................................ 1-17 INPUT CHARACTERISTICS............................................................ 1-19 LVC Input Circuitry . 1–20 Input Current Loading . 1–22 Supply Current Change (∆ICC). 1–23 Proper Termination of Unused Inputs and Bus Hold. 1–23 OUTPUT CHARACTERISTICS.......................................................... 1-25 LVC Output Circuitry . 1–25 Output Drive . 1–26 Partial Power Down . 1–27 Proper Termination of Outputs. 1–27 Technique 1 . 1–28 Technique 2 . 1–28 Technique 3 . 1–28 Technique 4 . 1–28 Technique 5 . 1–28 SIGNAL INTEGRITY .................................................................... 1-31 Simultaneous Switching . 1–31 ACKNOWLEDGEMENTS ................................................................ 1-31 1–3 List of Illustrations Figure Title Page 1–1 Comparison of 5-V CMOS, 5-V TTL, and 3.3-V TTL Switching Standards. 1–7 1–2 Summary of Four Cases When Interfacing 3.3-V Devices With 5-V Devices. 1–8 1–3 Propagation Delay Time Versus Operating Free-Air Temperature. 1–12 1–4 Propagation Delay Time Versus Number of Outputs Switching. 1–14 1–5 Propagation Delay Time Versus Load Capacitance. 1–15 1–6 ICC Versus Frequency . 1–17 1–7 Supply Current Versus Input Voltage. 1–19 1–8 Simplified Input Stage of an LVC Circuit. 1–20 1–9 Output Voltage Versus Input Voltage. 1–20 1–10 Input Current Versus Input Voltage. 1–21 1–11 Input Leakage Current Versus Input Voltage. 1–22 1–12 Bus Hold . 1–23 1–13 II(hold) Versus VI . 1–24 1–14 Simplified Output Stage of an LVC Circuit. 1–25 1–15 Typical LVC Output Characteristics. 1–26 1–16 Termination Techniques . 1–27 1–17 Simultaneous Switching Noise Waveform. 1–31 List of Tables Table Title Page 1–1 Input Current.
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