74LCX240 Low-Voltage Octal Buffer/Line Driver with 5V Tolerant Inputs and Outputs Y General Description Y The LCX240 is an inverting octal buffer and line driver designed to be employed as a memory address driver, clock driver and bus oriented transmitter or receiver. The device is designed for low voltage (3.3V) VCC applications with capability of interfacing to a 5V signal environment. The LCX240 is fabricated with an advanced CMOS technology to achieve high speed operation while maintaining CMOS low power dissipation. Features Y Y Y Y Y Y Y Y Power-down high impedance inputs and outputs Supports live insertion/withdrawal 2.0V – 3.6V VCC supply operation g 24 mA output drive Implements patented Quiet SeriesTM noise/EMI reduction circuitry Functionally compatible with the 74 series 240 Latch-up performance exceeds 500 mA ESD performance: Human Body Model l 2000V Machine Model l 200V 5V tolerant inputs and outputs 6.5 ns tPD max, 10 mA ICCQ max Logic Symbol Connection Diagram Pin Assignment for SOIC, SSOP and TSSOP IEEE/IEC TL/F/11993 – 2 TL/F/11993 – 1 Pin Names OE1, OE2 I0 – I7 O 0 – O7 Truth Tables Inputs Description TRI-STATEÉ Output Enable Inputs Inputs Outputs Inputs OE1 In Outputs (Pins 12, 14, 16, 18) OE2 In Outputs (Pins 3, 5, 7, 9) L L H L H X H L Z L L H L H X H L Z H e HIGH Voltage Level L e LOW Voltage Level Order Number See NS Package Number X e Immaterial Z e High Impedance SOIC JEDEC SOIC EIAJ SSOP Type II TSSOP 74LCX240WM 74LCX240WMX 74LCX240SJ 74LCX240SJX 74LCX240MSA 74LCX240MSAX 74LCX240MTC 74LCX240MTCX M20B M20D MSA20 MTC20 TRI-STATEÉ is a registered trademark of National Semiconductor Corporation. Quiet SeriesTM is a trademark of National Semiconductor Corporation. C1996 National Semiconductor Corporation TL/F/11993 RRD-B30M17/Printed in U. S. A. http://www.national.com 74LCX240 Low-Voltage Octal Buffer/Line Driver with 5V Tolerant Inputs and Outputs December 1996 Absolute Maximum Ratings (Note 1) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Symbol Parameter Value VCC Supply Voltage b 0.5 to a 7.0 VI DC Input Voltage b 0.5 to a 7.0 VO DC Output Voltage b 0.5 to a 7.0 Conditions Units V V Output in TRI-STATE b 0.5 to VCC a 0.5 V Output in High or Low State (Note 2) V IIK DC Input Diode Current b 50 VI k GND mA IOK DC Output Diode Current b 50 a 50 VO k GND VO l VCC mA IO DC Output Source/Sink Current ICC DC Supply Current per Supply Pin IGND DC Ground Current per Ground Pin TSTG Storage Temperature g 50 mA g 100 mA g 100 mA b 65 to a 150 §C Note 1: The Absolute Maximum Ratings are those values beyond which the safety of the device cannot be guaranteed. The device should not be operated at these limits. The parametric values defined in the ‘‘Electrical Characteristics’’ table are not guaranteed at the Absolute Maximum Ratings. The ‘‘Recommended Operating Conditions’’ table will define the conditions for actual device operation. Note 2: IO Absolute Maximum Rating must be observed. Recommended Operating Conditions Symbol Parameter VCC Supply Voltage Operating Data Retention VI Input Voltage VO Output Voltage HIGH or LOW State TRI-STATE IOH/IOL Output Current VCC e 3.0V – 3.6V VCC e 2.7V TA Free-Air Operating Temperature Dt/DV Input Edge Rate, VIN e 0.8V–2.0V, VCC e 3.0V Min Max Units 2.0 1.5 3.6 3.6 V 0 5.5 V 0 0 VCC 5.5 V g 24 g 12 mA b 40 85 §C 0 10 ns/V DC Electrical Characteristics Symbol Parameter Conditions VCC (V) VIH HIGH Level Input Voltage 2.7 – 3.6 VIL LOW Level Input Voltage 2.7 – 3.6 VOH HIGH Level Output Voltage VOL LOW Level Output Voltage TA e b40§ C to a 85§ C Min Max 2.0 Units V 0.8 V IOH e b100 mA 2.7 – 3.6 VCC b 0.2 V IOH e b12 mA 2.7 2.2 V IOH e b18 mA 3.0 2.4 V IOH e b24 mA 3.0 2.2 V IOL e 100 mA 2.7 – 3.6 0.2 V IOL e 12 mA 2.7 0.4 V IOL e 16 mA 3.0 0.4 V IOL e 24 mA 3.0 0.55 V II Input Leakage Current 0 s VI s 5.5V 2.7 – 3.6 g 5.0 mA IOZ TRI-STATE Output Leakage 0 s VO s 5.5V VI e VIH or VIL 2.7 – 3.6 g 5.0 mA IOFF Power-Off Leakage Current ICC Quiescent Supply Current VI or VO e 5.5V VI e VCC or GND DICC Increase in ICC per Input http://www.national.com 0 10 mA 2.7 – 3.6 10 mA 3.6V s VI, VO s 5.5V 2.7 – 3.6 g 10 mA VIH e VCC b 0.6V 2.7 – 3.6 500 mA 2 AC Electrical Characteristics TA e b40§ C to a 85§ C Symbol Parameter VCC e 3.3V g 0.3V Units VCC e 2.7V Min Max Min Max tPHL tPLH Propagation Delay Data to Output 1.5 1.5 6.5 6.5 1.5 1.5 7.5 7.5 ns tPZL tPZH Output Enable Time 1.5 1.5 8.0 8.0 1.5 1.5 9.0 9.0 ns tPLZ tPHZ Output Disable Time 1.5 1.5 7.0 7.0 1.5 1.5 8.0 8.0 ns tOSHL tOSLH Output to Output Skew (Note 1) 1.0 1.0 ns Note 1: Skew is defined as the absolute value of the difference between the actual propagation delay for any two separate outputs of the same device. The specification applies to any outputs switching in the same direction, either HIGH to LOW (tOSHL) or LOW to HIGH (tOSLH). Dynamic Switching Characteristics Symbol Parameter Conditions VCC (V) TA e 25§ C Units Typical VOLP Quiet Output Dynamic Peak VOL CL e 50 pF, VIH e 3.3V, VIL e 0V 3.3 0.8 V VOLV Quiet Output Dynamic Valley VOL CL e 50 pF, VIH e 3.3V, VIL e 0V 3.3 b 0.8 V Capacitance Typical Units CIN Symbol Input Capacitance Parameter VCC e Open, VI e 0V or VCC Conditions 7 pF COUT Output Capacitance VCC e 3.3V, VI e 0V or VCC 8 pF CPD Power Dissipation Capacitance VCC e 3.3V, VI e 0V or VCC, F e 10 MHz 25 pF 3 http://www.national.com 74LCX240 Ordering Information The device number is used to form part of a simplified purchasing code where the package type and temperature range are defined as follows: TL/F/11993 – 3 Physical Dimensions inches (millimeters) unless otherwise noted 20-Lead Small Outline Integrated Circuit Order Number 74LCX240WM or 74LCX240WMX NS Package Number M20B http://www.national.com 4 Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 20-Lead Small Outline Package, EIAJ (SJ) Order Number 74LCX240SJ or 74LCX240SJX NS Package Number M20D All dimensions are in millimeters. 20-Lead Molded Shrink Small Outline Package, EIAJ, Type II Order Number 74LCX240MSA or 74LCX240MSAX NS Package Number MSA20 5 http://www.national.com 74LCX240 Low-Voltage Octal Buffer/Line Driver with 5V Tolerant Inputs and Outputs Physical Dimensions All dimensions are in millimeters (Continued) 20-Lead Thin Shrink Small Outline Package, JEDEC Order Number 74LCX240MTC or 74LCX240MTCX NS Package Number MTC20 LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL SEMICONDUCTOR CORPORATION. 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