54ACTQ16541 16-Bit Buffer/Line Driver with TRI-STATE Outputs General Description Features The ’ACTQ16541 contains sixteen non-inverting buffers with TRI-STATE outputs designed to be employed as a memory and address driver, clock driver, or bus oriented transmitter/ receiver. The device is byte controlled. Each byte has separate TRI-STATE control inputs which can be shorted together for full 16-bit operation. The ’ACTQ16541 utilizes NSC Quiet Series technology to guarantee quiet output switching and improved dynamic threshold performance. FACT Quiet Series™ features GTO™ output control for superior performance. n Utilizes NSC FACT Quiet Series technology n Guaranteed simultaneous switching noise level and dynamic threshold performance n Separate control logic for each byte n 16-bit version of the ’ACTQ541 n Outputs source/sink 24 mA Logic Symbol Connection Diagram Pin Assignment for CERPAK DS010936-1 Pin Description Pin Names Description OEn Output Enable Input (Active Low) I0–I15 Inputs O0–O15 Outputs DS010936-2 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 DS010936 www.national.com 54ACTQ16541 16-Bit Buffer/Line Driver with TRI-STATE Outputs September 1998 Functional Description Truth Tables The ’ACTQ16541 contains sixteen non-inverting buffers with TRI-STATE standard outputs. The device is byte controlled with each byte functioning identically, but independent of the other. The control pins can be shorted together to obtain full 16-bit operation. The TRI-STATE outputs are controlled by an Output Enable (OEn) input for each byte. When OEn is LOW, the outputs are in 2-state mode. When OEn is HIGH, the outputs are in the high impedance mode, but this does not interfere with entering new data into the inputs. Inputs OE2 I0–I7 O0–O7 L L H H H X X Z X H X Z L L L Inputs OE4 I8–I15 O8–O15 L L H H H X X Z X H X Z L L L L Logic Diagram DS010936-3 2 L Outputs OE3 H = High Voltage Level L = Low Voltage Level X = Immaterial Z = High Impedance www.national.com Outputs OE1 Absolute Maximum Ratings (Note 1) Recommended Operating Conditions 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 Output Diode Current (IOK) VO = −0.5V VO = VCC + 0.5V DC Output Voltage (VO) DC Output Source/Sink Current (IO) DC VCC or Ground Current per Output Pin Junction Temperature CDIP Storage Temperature Supply Voltage (VCC) ’ACTQ Input Voltage (VI) Output Voltage (VO) Operating Temperature (TA): 54ACTQ Minimum Input Edge Rate (dV/dt) ’ACTQ Devices VIN from 0.8V to 2.0V VCC 4.5V, 5.5V −0.5V to +7.0V −20 mA +20 mA −20 mA +20 mA −0.5V to VCC + 0.5V ± 50 mA 4.5V to 5.5V 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. ± 50 mA +175˚C −65˚C to +150˚C DC Electrical Characteristics for ’ACTQ Family Devices Symbol Parameter 54ACTQ VCC (V) Units Conditions TA = −55˚C to +125˚C Guaranteed Limits VIH VIL VOH Minimum High 4.5 2.0 Input Voltage 5.5 2.0 Maximum Low 4.5 0.8 Input Voltage 5.5 0.8 Minimum High 4.5 4.4 Output Voltage 5.5 5.4 V VOUT = 0.1V or VCC − 0.1V V VOUT = 0.1V or VCC − 0.1V V IOUT = −50 µA (Note 2) VIN = VIL or VIH VOL 4.5 3.70 5.5 4.70 Maximum Low 4.5 0.1 Output Voltage 5.5 0.1 V IOH = −24 mA IOH = −24 mA V IOUT = 50 µA (Note 2) VIN = VIL or VIH IOZ Maximum TRI-STATE 4.5 0.50 5.5 0.50 V 5.5 ± 10.0 µA 5.5 ± 1.0 µA Leakage Current IIN Maximum Input IOL = 24 mA IOL = 24 mA VI = VIL, VIH VO = VCC, GND VI = VCC, GND Leakage Current ICCT Maximum ICC/Input 5.5 1.6 mA VI = VCC − 2.1V ICC Max Quiescent 5.5 160.0 µA VIN = VCC or GND 50 mA VOLD = 1.65V Max -50 mA VOHD = 3.85V Min Supply Current IOLD Minimum Dynamic IOHD Output Current (Note 3) 5.5 3 www.national.com DC Electrical Characteristics for ’ACTQ Family Devices Symbol Parameter 54ACTQ VCC (V) (Continued) Units Conditions TA = −55˚C to +125˚C Guaranteed Limits VOLP Quiet Output 5.0 1.2 V Maximum Dynamic VOL VOLV Quiet Output (Note 4) 5.0 -1.2 V Minimum Dynamic VOL (Note 4) Note 2: All outputs loaded; thresholds associated with output under test. Note 3: Maximum test duration 2.0 ms; one output loaded at a time. Note 4: Maximum number of outputs that can switch simultaneously is n. (n − 1) outputs are switched HIGH and one output held HIGH. AC Electrical Characteristics Symbol Parameter VCC (V) (Note 5) 54ACTQ Units TA = −55˚C to +125˚C CL = 50 pF tPLH, Propagation Delay tPHL Data to Output tPZH, Output Enable Time 5.0 5.0 tPZL tPHZ, Output Disable Time 5.0 tPLZ Min Max 3.0 10.3 3.0 10.0 3.0 10.5 3.0 11.5 3.0 11.0 3.0 11.0 ns ns ns Note 5: Voltage Range 5.0 is 5.0V ± 0.5V. Capacitance Max Units CIN Symbol Input Capacitance 5 pF VCC = 5.0V CPD Power Dissipation Capacitance 100 pF VCC = 5.0V www.national.com Parameter 4 Conditions 54ACTQ16541 16-Bit Buffer/Line Driver with TRI-STATE Outputs Physical Dimensions inches (millimeters) unless otherwise noted 48-Lead CERPAC NS Package Number WA48A 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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