54AC540 Octal Buffer/Line Driver with TRI-STATE ® Outputs General Description Features The ’AC540 is an octal buffer/line drivers designed to be employed as memory and address drivers, clock drivers and bus oriented transmitter/receivers. n ICC and IOZ reduced by 50% n TRI-STATE inverting outputs n Inputs and outputs opposite side of package, allowing easier interface to microprocessors n Output source/sink 24 mA n Standard Military Drawing 54AC540: 5962-8769501 These devices are similar in function to the ’AC240 while providing flow-through architecture (inputs on opposite side from outputs). This pinout arrangement makes these devices especially useful as output ports for microprocessors, allowing ease of layout and greater PC board density. Logic Symbol Truth Table Inputs IEEE/IEC OE1 Outputs OE2 I L L H L H X X Z X H X Z L L L H H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial Z = High Impedance DS100293-1 TRI-STATE ® is a registered trademark of National Semiconductor Corporation. FACT™ is a trademark of Fairchild Semiconductor Corporation. © 1998 National Semiconductor Corporation DS100293 www.national.com 54AC540 Octal Buffer/Line Driver with TRI-STATE Outputs July 1998 Connection Diagrams Pin Assignment for DIP and Flatpak Pin Assignment for LCC DS100293-2 DS100293-3 www.national.com 2 Absolute Maximum Ratings (Note 1) Storage Temperature (TSTG) Junction Temperature (TJ) CDIP If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage (VCC) DC Input Diode Current (IIK) VI = −0.5V VI = VCC + 0.5V DC Input Voltage (VI) DC Output Diode Current (IOK) VO = −0.5V VO = VCC + 0.5V DC Output Voltage (VO) DC Output Source or Sink Current (IO) DC VCC or Ground Current per Output Pin (ICC or IGND) −65˚C to +150˚C 175˚C Recommended Operating Conditions −0.5V to +7.0V −20 mA +20 mA −0.5V to VCC + 0.5V Supply Voltage (VCC) ’AC Input Voltage (VI) Output Voltage (VO) Operating Temperature (TA) 54AC Minimum Input Edge Rate (∆V/∆t) ’AC Devices VIN from 30% to 70% of VCC VCC @ 3.3V, 4.5V, 5.5V −20 mA +20 mA −0.5V to VCC + 0.5V ± 50 mA ± 50 mA 2.0V to 6.0V 0V to VCC 0V to VCC −55˚C to +125˚C 125 mV/ns Note 1: Absolute maximum ratings are those values beyond which damage to the device may occur. 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 of FACT™ circuits outside databook specifications. DC Characteristics for ’AC Family Devices Symbol Parameter VCC 54AC TA = (V) −55˚C to +125˚C Units Conditions Guaranteed Limits VIH VIL VOH VOL IIN Minimum High Level 3.0 2.1 Input Voltage 4.5 3.15 5.5 3.85 Maximum Low Level 3.0 0.9 Input Voltage 4.5 1.35 5.5 1.65 Minimum High Level 3.0 2.9 Output Voltage 4.5 4.4 5.5 5.4 3.0 2.4 4.5 3.7 5.5 4.7 Maximum Low Level 3.0 0.1 Output Voltage 4.5 0.1 5.5 0.1 Maximum Input VOUT = 0.1V V or VCC − 0.1V V or VCC − 0.1V VOUT = 0.1V IOUT = −50 µA V (Note 2) VIN = VIL or VIH IOH = −12 mA V IOH = −24 mA IOH = −24 mA IOUT = 50 µA V (Note 2) VIN = VIL or VIH IOL = 12 mA 3.0 0.50 4.5 0.50 5.5 0.50 5.5 ± 1.0 µA 5.5 ± 5.0 µA V IOL = 24 mA IOL = 24 mA VI = VCC, GND Leakage Current IOZ Maximum TRI-STATE Current 3 VI (OE) = VIL, VIH VI = VCC, GND VO = VCC, GND www.national.com DC Characteristics for ’AC Family Devices Symbol Parameter (Continued) VCC 54AC TA = (V) −55˚C to +125˚C Units Conditions Guaranteed Limits (Note 3) IOLD Minimum Dynamic 5.5 50 mA IOHD Output Current 5.5 −50 mA VOLD = 1.65V Max VOHD = 3.85V Min ICC Maximum Quiescent 5.5 80.0 µA VIN = VCC Supply Current or GND Note 2: All outputs loaded; thresholds on input associated with output under test. Note 3: Maximum test duration 2.0 ms, one output loaded at a time. Note 4: IIN and ICC @ 3.0V are guaranteed to be less than or equal to the respective limit @ 5.5V VCC. ICC for 54AC @ 25˚C is identical to 74AC @ 25˚C. AC Electrical Characteristics 54AC TA = −55˚C VCC Symbol Parameter (V) to +125˚C CL = 50 pF (Note 5) tPLH tPHL tPZH tPZL Min Max Propagation Delay 3.3 1.0 9.0 Data to Output 5.0 1.5 7.0 Propagation Delay 3.3 1.0 8.0 Data to Output 5.0 1.5 6.5 Output Enable Time 3.3 1.0 13.0 5.0 1.5 10.0 3.3 1.0 12.0 5.0 1.5 9.0 3.3 1.0 15.5 5.0 1.5 12.0 3.3 1.0 12.0 5.0 1.5 10.0 Output Enable Time tPHZ Output Disable Time tPLZ Output Disable Time Note 5: Voltage Range 3.3 is 3.3V ± 0.3V Voltage Range 5.0 is 5.0V ± 0.5V Capacitance Symbol CIN CPD Typ Units Input Capacitance Parameter 4.5 pF Power Dissipation 30.0 pF Capacitance www.national.com Units 4 Conditions VCC = OPEN VCC = 5.0V ns ns ns ns ns ns Physical Dimensions inches (millimeters) unless otherwise noted 20-Terminal Ceramic Leadless Chip Carrier (L) NS Package Number E20A 20-Lead Ceramic Dual-In-Line Package (D) NS Package Number J20A 5 www.national.com 54AC540 Octal Buffer/Line Driver with TRI-STATE Outputs Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 20-Lead Ceramic Flatpak (F) NS Package Number W20A 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: 2. A critical component in any component of a life support 1. Life support devices or systems are devices or sysdevice or system whose failure to perform can be reatems which, (a) are intended for surgical implant into sonably expected to cause the failure of the life support the body, or (b) support or sustain life, and whose faildevice or system, or to affect its safety or effectiveness. ure 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. 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