Octal Buffer/Line Driver

www.DataSheet4U.com 54AC244 • 54ACT244 Octal Buffer/Line Driver with TRI-STATE Outputs August 1998 54AC244 • 54ACT244 Octal Buffer/Line Driver with TRI-STATE ® Outputs General Description The ’AC/’ACT244 is an octal buffer and line driver designed to be employed as a memory address driver, clock driver and bus-oriented transmitter/receiver which provides improved PC board density. Features n ICC and IOZ reduced by 50% n TRI-STATE outputs drive bus lines or buffer memory address registers n Outputs source/sink 24 mA n ’ACT244 has TTL-compatible inputs n Standard Microcircuit Drawing (SMD) — ’AC244: 5962-87552 — ’ACT244: 5962-87760 Logic Symbol IEEE/IEC Pin Names OE1, OE2 I0–I7 O0–O7 Inputs Outputs Description TRI-STATE Output Enable Inputs DS100282-1 TRI-STATE ® is a registered trademark of National Semiconductor Corporation. FACT ® is a registered trademark of Fairchild Semiconductor Corporation. © 1998 National Semiconductor Corporation DS100282 www.national.com Connection Diagrams Pin Assignment for DIP and Flatpak Truth Tables Inputs OE1 L L H In L H X Outputs (Pins 12, 14, 16, 18) L H Z H = HIGH Voltage Level L = LOW Voltage Level Inputs OE2 L L H DS100282-2 Outputs (Pins 3, 5, 7, 9) L H Z L In H X X = Immaterial Z = High Impedance Pin Assignment for LCC DS100282-3 www.national.com 2 Absolute Maximum Ratings (Note 1) 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) Storage Temperature (TSTG) Junction Temperature (TJ) CDIP −0.5V to +7.0V −20 mA +20 mA −0.5V to VCC + 0.5V −20 mA +20 mA −0.5V to VCC + 0.5V Recommended Operating Conditions Supply Voltage (VCC) ’AC ’ACT Input Voltage (VI) Output Voltage (VO) Operating Temperature (TA) 54AC/ACT Minimum Input Edge Rate (∆V/∆t) ’AC Devices VIN from 30% to 70% of VCC VCC @ 3.3V, 4.5V, 5.5V Minimum Input Edge Rate (∆V/∆t) ’ACT Devices VIN from 0.8V to 2.0V VCC @ 4.5V, 5.5V 2.0V to 6.0V 4.5V to 5.5V 0V to VCC 0V to VCC −55˚C to +125˚C 125 mV/ns ±50 mA ±50 mA −65˚C to +150˚C 175˚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 (V) VIH Minimum High Level Input Voltage VIL Maximum Low Level Input Voltage VOH Minimum High Level Output Voltage 3.0 4.5 5.5 3.0 4.5 5.5 3.0 4.5 5.5 54AC TA = −55˚C to +125˚C Guaranteed Limits 2.1 3.15 3.85 0.9 1.35 1.65 2.9 4.4 5.4 (Note 2) VIN = VIL or VIH 3.0 4.5 5.5 VOL Maximum Low Level Output Voltage 3.0 4.5 5.5 2.4 3.7 4.7 0.1 0.1 0.1 (Note 2) VIN = VIL or VIH 3.0 4.5 5.5 IIN Maximum Input Leakage Current 5.5 0.50 0.50 0.50 V µA IOL VI = VCC, GND 12 mA 24 mA 24 mA V IOUT = 50 µA V IOH −12 mA −24 mA −24 mA V IOUT = −50 µA V VOUT = 0.1V or VCC − 0.1V V VOUT = 0.1V or VCC − 0.1V Units Conditions ±1.0 3 www.national.com DC Characteristics for ’AC Family Devices Symbol Parameter VCC (V) IOZ Maximum TRI-STATE Current IOLD IOHD ICC (Note 3) Minimum Dynamic Output Current Maximum Quiescent Supply Current 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. (Continued) 54AC TA = −55˚C to +125˚C Guaranteed Limits Units Conditions 5.5 5.5 5.5 5.5 ±5.0 50 −50 80.0 µA mA mA µA VI (OE) = VIL, VIH VI = VCC, VGND VO = VCC, GND VOLD = 1.65V Max VOHD = 3.85V Min VIN = VCC or GND Note 4: IIN and ICC @ 3.0V are guaranteed to be less than or equal to the respective limit @ 5.5V VCC. Note 5: ICC for 54AC @ 25˚C is identical to 74AC @ 25˚C. DC Characteristics for ’ACT Family Devices Symbol Parameter VCC (V) VIH VIL VOH Minimum High Level Input Voltage Maximum Low Level Input Voltage Minimum High Level Output Voltage 4.5 5.5 4.5 5.5 4.5 5.5 54ACT TA = −55˚C to +125˚C Guaranteed Limits 2.0 2.0 0.8 0.8 4.4 5.4 (Note 6) VIN = VIL or VIH 4.5 5.5 VOL Maximum Low Level Output Voltage 4.5 5.5 3.70 4.70 0.1 0.1 (Note 6) VIN = VIL or VIH 4.5 5.5 IIN IOZ ICCT IOLD IOHD ICC Maximum Input Leakage Current Maximum TRI-STATE Current Maximum ICC/Input (Note 7) Minimum Dynamic Output Current Maximum Quiescent Supply Current Note 6: All outputs loaded; thresholds on input associated with output under test. Note 7: Maximum test duration 2.0 ms, one output loaded at a time. Note 8: ICC for 54ACT @ 25˚C is identical to 74ACT @ 25˚C. Units Conditions V V V VOUT = 0.1V or VCC − 0.1V VOUT = 0.1V or VCC − 0.1V IOUT = −50 µA V V IOH IOUT = 50 µA −24 mA −24 mA 0.50 0.50 V µA µA mA mA mA µA IOL VI = VCC, GND VI = VIL, VIH VO = VCC, GND VI = VCC − 2.1V VOLD = 1.65V Max VOHD = 3.85V Min VIN = VCC or GND 24 mA 24 mA 5.5 5.5 5.5 5.5 5.5 5.5 ±1.0 ±5.0 1.6 50 −50 80.0 www.national.com 4 AC Electrical Characteristics VCC Symbol Parameter (V) (Note 9) Min tPLH tPHL tPZH tPZL tPHZ tPLZ Propagation Delay Data to Output Propagation Delay Data to Output Output Enable Time Output Enable Time Output Disable Time Output Disable Time 3.3 5.0 3.3 5.0 3.3 5.0 3.3 5.0 3.3 5.0 3.3 5.0 Note 9: Voltage Range 3.3 is 3.3V ±0.3V Voltage Range 5.0 is 5.0V ±0.5V 54AC TA = −55˚C to +125˚C CL = 50 pF Max 12.5 9.5 12.0 9.0 11.5 9.0 13.0 10.5 12.5 10.5 13.0 11.0 ns ns ns ns ns ns 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 Units AC Electrical Characteristics VCC Symbol Parameter (V) (Note 10) Min tPLH tPHL tPZH tPZL tPHZ tPLZ Propagation Delay Data to Output Propagation Delay Data to Output Output Enable Time Output Enable Time Output Disable Time Output Disable Time 5.0 5.0 5.0 5.0 1.0 1.0 1.0 1.0 9.5 11.0 11.0 11.5 ns ns ns ns 5.0 1.0 10.0 ns 5.0 1.0 54ACT TA = −55˚C to +125˚C CL = 50 pF Max 10.0 ns Units Note 10: Voltage Range 5.0 is 5.0V ±0.5V Capacitance Symbol CIN CPD Parameter Input Capacitance Power Dissipation Capacitance Typ 4.5 45.0 Units pF pF Conditions VCC = OPEN VCC = 5.0V 5 www.national.com 6 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 7 www.national.com 54AC244 • 54ACT244 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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