54ACTQ541 Quiet Series Octal Buffer/Line Driver with TRI-STATE ® Outputs General Description Features The ’ACTQ541 is an octal buffer and line driver with TRI-STATE outputs designed to be employed as a memory and address driver, clock driver, or bus-oriented transmitter/ receiver. The ’ACTQ541 is similar to the ’ACTQ244 while providing flow-through architecture (inputs on opposite sides 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. The ’ACTQ541 utilizes NSC Quiet Series technology to guarantee quiet output switching and improved dynamic threshold performance. FACT Quiet Series™ features GTO™ output control and undershoot corrector in addition to a split ground bus for superior ACMOS performance. n Non-inverting buffers n Guaranteed simultaneous switching noise level and dynamic threshold performance n Flow-through pinout for ease of PC board layout n Non-inverting TRI-STATE™ outputs n TTL compatible inputs n CMOS power consumption n Output source/sink 24 mA n Standard Microcircuit Drawing (SMD) 5962-9682901 Connection Diagram Pin Names Pin Assignment DIP and Cerpack Description OE1, OE2 Output Enable Input (Active Low) I0–I7 Inputs O0–O7 Outputs Truth Table Inputs OE1 DS100983-1 Outputs OE2 I ACTQ541 H L L H H X X Z X H X Z L L L L H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial Z = High Impedance Pin Assignment LCC DS100983-30 GTO™ is a trademark of National Semiconductor Corporation. TRI-STATE ® is a registered trademark of National Semiconductor Corporation. FACT™ and FACT Quiet Series™ are trademarks of Fairchild Semiconductor Corporation. © 1998 National Semiconductor Corporation DS100983 www.national.com 54ACTQ541 Quiet Series Octal Buffer/Line Driver with TRI-STATE Outputs September 1998 Absolute Maximum Ratings (Note 1) 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) Storage Temperature (TSTG) DC Latch-Up ± 300 mA Source or Sink Current Junction Temperature (TJ) CDIP If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. 175˚C Recommended Operating Conditions −0.5V to +7.0V −20 mA +20 mA −0.5V to VCC + 0.5V Free Air Ambient Temperature Military Supply Voltage Military Minimum Input Edge Rate ’ACTQ Devices VIN from 0.8 to 2.0V VCC 4.5V, 5.5V −20 mA +20 mA −0.5V to VCC + 0.5V ± 50 mA −55˚C to +125˚C +4.5V to +5.5V (∆V/∆t) 125 mV/ns Note 1: Absolute maximum ratings are values beyond which the device may be damaged or have its useful life impaired. Functional operation under these conditions is not implied. ± 50 mA −65˚C to +150˚C Note 2: Either voltage limit or current limit is sufficient to protect inputs. DC Electrical Characteristics for ’ACTQ Family Devices Symbol Parameter VCC 54ACTQ TA = (V) −55˚C to +125˚C Units Conditions Guaranteed Limits VIH VIL VOH Minimum High Level 4.5 2.0 Input Voltage 5.5 2.0 Maximum Low Level 4.5 0.8 Input Voltage 5.5 0.8 Minimum High Level 4.5 4.4 Output Voltage 5.5 5.4 V VOUT = 0.1V V or VCC − 0.1V VOUT = 0.1V V or VCC − 0.1V IOUT = −50 µA (Note 3) VIN = VILor VIH VOL 4.5 3.70 5.5 4.70 Maximum Low Level 4.5 0.1 Output Voltage 5.5 0.1 V IOH = −24 mA V IOH = −24 mA IOUT = 50 µA (Note 3) VIN = VILor VIH IIN 4.5 0.50 5.5 0.50 5.5 TRI-STATE Output Leakage Current, High or Low Maximum Maximum Input V IOL = 24 mA ± 1.0 µA IOL = 24 mA VI = VCC, GND 5.5 ± 10.0 µA OE = 2.0V 5.5 1.6 mA VI = VCC − 2.1V Leakage Current IOZ ICCT ICC/Input IOLD Minimum Dynamic 5.5 50 mA IOHD Output Current (Note 4) 5.5 −50 mA VOLD = 1.65V Max VOHD = 3.85V Min ICC Maximum Quiescent 5.5 160.0 µA VIN = VCC Supply Current www.national.com or GND (Note 4) 2 DC Electrical Characteristics for ’ACTQ Family Devices Symbol Parameter VCC 54ACTQ TA = (V) −55˚C to +125˚C (Continued) Units Conditions Guaranteed Limits VOLP Quiet Output Maximum 5.0 1.5 V 5.0 -1.2 V Dynamic VOL VOLV (Note 4) Quiet Output Minimum Dynamic VOL (Note 5) Note 3: All outputs loaded; thresholds on input associated with output under test. Note 4: Maximum test duration 2.0 ms, one output loaded at a time. Note 5: Max number of outputs defined as (n). Data inputs are 0V to 3V. One output @ GND. AC Electrical Characteristics Symbol 54ACTQ TA = −55˚C to +125˚C VCC = 4.5V–5.5V Parameter Fig. Units No. CL = 50 pF Min Max tPLH Propagation Delay 2.0 9.0 tPHL Data to Outputs 2.0 9.0 tPZH Output Enable Time tPZL tPHZ Output Disable Time tPLZ 1.5 9.5 1.5 11.5 1.5 9.5 1.5 9.5 ns ns ns Capacitance Symbol Parameter Max Units Conditions TA = 25˚C VCC = 0.0V VCC = 5.0V CIN Input Capacitance 12.0 pF COUT (Note 6) Output Capacitance 15.0 pF Note 6: COUT is measured at frequency of f = 1 MHz, per MIL-STD-883B, Method 3012. 3 www.national.com 4 Physical Dimensions inches (millimeters) unless otherwise noted 20-Terminal Ceramic Chip Carrier NS Package Number E20A 20-Lead Ceramic Dual-In-Line Package NS Package Number J20A 5 www.national.com 54ACTQ541 Quiet Series Octal Buffer/Line Driver with TRI-STATE Outputs Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 20-Lead Ceramic Flatpack 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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