74VHC541 Octal Buffer/Line Driver with TRI-STATEE Outputs General Description The VHC541 is an advanced high-speed CMOS device fabricated with silicon gate CMOS technology. It achieves the high-speed operation similar to equivalent Bipolar Schottky TTL while maintaining the CMOS low power dissipation. The VHC541 is an octal buffer/line driver designed to be employed as memory and address drivers, clock drivers and bus oriented transmitter/receivers. This device is similar in function to the VHC244 while providing flow-through architecture (inputs on opposite side from outputs). This pinout arrangement makes this device especially useful as an output port for microprocessors, allowing ease of layout and greater PC board density. An input protection circuit insures that 0V to 7V can be applied to the input pins without regard to the supply voltage. This device can be used to interface 5V to 3V systems and two supply systems such as battery backup. This circuit prevents device destruction due to mismatched supply and input voltages. Features Y Y Y Y Y Y Commercial Low power dissipation: ICC e 4 mA (max) at TA e 25 C High noise immunity: VNIH e VNIL e 28% VCC (min) All inputs are equipped with a power down protection function Balanced propagation delays: tPLH j tPHL Low noise: VOLP e 0.9V (typ) Pin and function compatible with 74HC541 Package Number Package Description 74VHC541M M20B 20-Lead Molded JEDEC SOIC 74VHC541SJ M20D 20-Lead Molded EIAJ SOIC 74VHC541MTC MTC20 20-Lead Molded JEDEC Type 1 TSSOP 74VHC541N N20A 20-Lead Molded DIP Note: Surface mount packages are also available on Tape and Reel. Specify by appending the suffix letter ``X'' to the ordering code. Logic Symbol Connection Diagram Truth Table Inputs Pin Assignment for DIP, TSSOP and SOIC IEEE/IEC OE1 OE2 I L H X L L X H L H X X L Outputs H Z Z L H e HIGH Voltage Level L e LOW Voltage Level X e Immaterial Z e High Impedance TL/F/11639 - 2 TL/F/11639-1 TRI-STATEE is a registered trademark of National Semiconductor Corporation. C1995 National Semiconductor Corporation TL/F/11639 RRD-B30M125/Printed in U. S. A. 74VHC541 Octal Buffer/Line Driver with TRI-STATE Outputs November 1995 Absolute Maximum Ratings (Note 1) Supply Voltage (VCC) DC Input Voltage (VIN) Note 1: Absolute Maximum Ratings are values beyond which the device may be damaged or have its useful life impaired. The databook specifications should be met, without exception, to ensure that the system design is reliable over its power supply, temperature, and output/input loading variables. National does not recommend operation outside databook specifications. b 0.5V to a 7.0V b 0.5V to a 7.0V b 0.5V to VCC a 0.5V DC Output Voltage (VOUT) Input Diode Current (IIK) Output Diode Current (IOK) DC Output Current (IOUT) DC VCC/GND Current (ICC) Storage Temperature (TSTG) Lead Temperature (TL) (Soldering, 10 seconds) b 20 mA g 20 mA g 25 mA g 75 mA Recommended Operating Conditions b 65 C to a 150 C Supply Voltage (VCC) Input Voltage (VIN) Output Voltage (VOUT) Operating Temperature (TOPR) Input Rise and Fall Time (tr, tf) VCC e 3.3V g 0.3V VCC e 5.0V g 0.5V 260 C 2.0V to a 5.5V 0V to a 5.5V 0V to VCC b 40 C to a 85 C 0 E 100 ns/V 0 E 20 ns/V DC Characteristics for 'VHC Family Devices 74VHC Symbol Parameter VCC (V) Min VIH High Level Input Voltage 2.0 3.0-5.5 VIL Low Level Input Voltage 2.0 3.0-5.5 VOH High Level Output Voltage VOL Low Level Output Voltage IOZ TRI-STATE Output Off-State Current IIN Input Leakage Current ICC Quiescent Supply Current Typ Max 1.50 0.7 VCC Min 1.9 2.9 4.4 3.0 4.5 2.58 3.94 2.0 3.0 4.5 0.0 0.0 0.0 Units Conditions Max 1.50 0.7 VCC 0.50 0.3 VCC 2.0 3.0 4.5 2.0 3.0 4.5 TA e b40 C to a 85 C TA e 25 C V 0.50 0.3 VCC V 1.9 2.9 4.4 V 2.48 3.80 V VIN e VIH or VIL IOH e b50 mA IOH e b4 mA IOH e b8 mA 0.1 0.1 0.1 0.1 0.1 0.1 V 3.0 4.5 0.36 0.36 0.44 0.44 V 5.5 g 0.25 g 2.5 mA VIN e VIH or VIL VOUT e VCC or GND 0-5.5 g 0.1 g 1.0 mA VIN e 5.5V or GND 5.5 4.0 40.0 mA VIN e VCC or GND 2 VIN e VIH or VIL IOL e 50 mA IOL e 4 mA IOL e 8 mA DC Characteristics for 'VHC Family Devices 74VHC Symbol Parameter VCC (V) TA e 25 C Typ Limits Units Conditions VOLP** Quiet Output Maximum Dynamic VOL 5.0 0.9 1.2 V CL e 50 pF VOLV** Quiet Output Minimum Dynamic VOL 5.0 b 0.8 b 1.0 V CL e 50 pF VIHD** Minimum High Level Dynamic Input Voltage 5.0 3.5 V CL e 50 pF VILD** Maximum High Level Dynamic Input Voltage 5.0 1.5 V CL e 50 pF **Parameter guaranteed by design. 3 AC Electrical Characteristics for 'VHC Family Devices: Symbol Parameter VCC (V) 74VHC 74VHC TA e 25 C TA e b40 C to a 85 C Min tPLH, tPHL Propagation Delay Time 3.3 g 0.3 5.0 g 0.5 tPZL, tPZH TRI-STATE Output Enable Time 3.3 g 0.3 5.0 g 0.5 tPLZ, Typ Max Min Max 5.0 7.0 1.0 8.5 7.5 10.5 1.0 12.0 3.5 5.0 1.0 6.0 5.0 7.0 1.0 8.0 6.8 10.5 1.0 12.5 9.3 14.0 1.0 16.0 4.7 7.2 1.0 8.5 6.2 9.2 1.0 10.5 11.2 15.4 1.0 17.5 Units Conditions CL e 15 pF ns CL e 50 pF CL e 15 pF ns CL e 50 pF ns RL e 1 kX CL e 50 pF CL e 15 pF ns CL e 50 pF TRI-STATE Output Disable Time 3.3 g 0.3 tOSLH, tOSHL Output to Output Skew 3.3 g 0.3 1.5 1.5 5.0 g 0.5 1.0 1.0 CIN Input Capacitance 4 10 10 pF VCC e Open COUT Output Capacitance 6 pF VCC e 5.0V CPD Power Dissipation Capacitance 18 pF tPHZ CL e 15 pF RL e 1 kX CL e 50 pF ns 5.0 g 0.5 6.0 8.8 1.0 10.0 CL e 50 pF ns (Note 1) CL e 50 pF CL e 50 pF (Note 2) Note 1: Parameter guaranteed by design. tOSLH e l tPLHmax b tPLHmin l ; tOSHL e l tPHLmax b tPHLmin l . Note 2: CPD is defined as the value of the internal equivalent capacitance which is calculated from the operating current consumption without load. Average operating current can be obtained by the equation: ICC (OPR.) e CPD * VCC * fIN a ICC/8 (per bit). 4 Ordering Information TL/F/11639 - 3 5 Physical Dimensions inches (millimeters) 20-Lead Small Outline Integrated CircuitJEDEC SOIC (M) NS Package Number M20B 20-Lead Plastic EIAJ SOIC (SJ) NS Package Number M20D 6 Physical Dimensions inches (millimeters) (Continued) 20-Lead Molded Thin Shrink Small Outline JEDEC Type 1 TSSOP Order Number 74VHC541MTC NS Package Number MTC20 7 74VHC541 Octal Buffer/Line Driver with TRI-STATE Outputs Physical Dimensions millimeters (Continued) 20-Lead (0.300x Wide) Molded Dual-In-Line Package Order Number 74VHC541N NS Package Number N20A 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. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and whose failure to perform, when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. National Semiconductor Corporation 1111 West Bardin Road Arlington, TX 76017 Tel: 1(800) 272-9959 Fax: 1(800) 737-7018 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. 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