54AC240 • 54ACT240 Octal Buffer/Line Driver with TRI-STATE ® Outputs General Description The ’AC/’ACT240 is an octal buffer and line driver designed to be employed as a memory address driver, clock driver and bus oriented transmitter or receiver which provides improved PC board density. Features n Inverting TRI-STATE outputs drive bus lines or buffer memory address registers n Outputs source/sink 24 mA n ’ACT240 has TTL-compatible inputs n Standard Microcircuit Drawing (SMD) — ’AC240: 5962-87550 — ’ACT240: 5962-87759 n ICC and IOZ reduced by 50% Logic Symbol Connection Diagrams IEEE/IEC Pin Assignment for DIP and Flatpak DS100280-2 DS100280-1 Pin Names Pin Assignment for LCC Description OE1, OE2 TRI-STATE Output Enable Inputs I0–I7 Inputs O0–O7 Outputs DS100280-3 TRI-STATE ® is a registered trademark of National Semiconductor Corporation. FACT ® is a registered trademark of Fairchild Semiconductor Corporation. © 1998 National Semiconductor Corporation DS100280 www.national.com 54AC240 • 54ACT240 Octal Buffer/Line Driver with TRI-STATE Outputs August 1998 Truth Tables Inputs OE1 Outputs In (Pins 12, 14, 16, 18) L L H L H L H X Z Inputs OE2 Outputs In (Pins 3, 5, 7, 9) L L H L H L H X Z H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial Z = High Impedance www.national.com 2 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 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 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 −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 ± 50 mA ± 50 mA −65˚C to +150˚C 2.0V to 6.0V 4.5V to 5.5V 0V to VCC 0V to VCC −55˚C to +125˚C 125 mV/ns 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. 175˚C 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 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 Maximum Low Level Output Voltage IIN Maximum Input 3.0 2.4 4.5 3.7 5.5 4.7 3.0 0.1 4.5 0.1 5.5 0.1 3.0 0.50 4.5 0.50 5.5 0.50 5.5 ± 1.0 VOUT = 0.1V V or VCC − 0.1V V or VCC − 0.1V VOUT = 0.1V IOUT = −50 µA V V (Note 2) VIN = VIL or VIH IOH = −12 mA IOH = −24 mA IOH = −24 mA IOUT = 50 µA V (Note 2) VIN = VIL or VIH IOL = 12 mA V µA IOL = 24 mA IOL = 24 mA VI = VCC, GND Leakage Current 3 www.national.com DC Characteristics for ’AC Family Devices Symbol Parameter (Continued) VCC 54AC TA = (V) −55˚C to +125˚C Units Conditions µA VI (OE) = VIL, VIH VI = VCC, GND VO = VCC, GND Guaranteed Limits IOZ Maximum TRI-STATE ± 5.0 Leakage Current 5.5 IOLD Minimum Dynamic 5.5 50 mA IOHD Output Current (Note 3) 5.5 −50 mA ICC Maximum Quiescent 5.5 80.0 µA Supply Current VOLD = 1.65V Max VOHD = 3.85V Min VIN = VCC 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. DC Characteristics for ’ACT Family Devices Symbol Parameter VCC 54ACT TA = (V) −55˚C to +125˚C Units Conditions Guaranteed Limits VIH VIL VOH VOL IIN 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 4.5 3.70 5.5 4.70 Maximum Low Level 4.5 0.1 Output Voltage 5.5 0.1 Maximum Input V VOUT = 0.1V V or VCC − 0.1V VOUT = 0.1V V or VCC − 0.1V IOUT = −50 µA V (Note 5) VIN = VIL or VIH IOH = −24 mA V IOH = −24 mA IOUT = 50 µA V (Note 5) VIN = VIL or VIH IOL = 24 mA IOL = 24 mA VI = VCC, GND 4.5 0.50 5.5 0.50 5.5 ± 1.0 µA 5.5 ± 5.0 µA VI = VIL, VIH VO = VCC, GND 5.5 1.6 mA VI = VCC − 2.1V VOLD = 1.65V Max VOHD = 3.85V Min VIN = VCC Leakage Current IOZ Maximum TRI-STATE Leakage Current ICCT Maximum ICC/Input IOLD Minimum Dynamic 5.5 50 mA IOHD Output Current (Note 6) 5.5 −50 mA ICC Maximum Quiescent 5.5 80.0 µA Supply Current or GND Note 5: All outputs loaded; thresholds on input associated with output under test. Note 6: Maximum test duration 2.0 ms, one output loaded at a time. Note 7: ICC for 54ACT @ 25˚C is identical to 74ACT @ 25˚C. www.national.com 4 AC Electrical Characteristics 54AC TA = −55˚C VCC Symbol Parameter (V) to +125˚C CL = 50 pF (Note 8) tPLH tPHL tPZH tPZL Min Max Propagation Delay 3.3 1.0 11.0 Data to Output 5.0 1.0 8.5 Propagation Delay 3.3 1.0 10.5 Data to Output 5.0 1.0 8.0 Output Enable Time 3.3 1.0 11.5 5.0 1.0 9.0 3.3 1.0 13.0 5.0 1.0 10.5 3.3 1.0 12.5 5.0 1.0 10.5 3.3 1.0 13.5 5.0 1.0 11.0 Output Enable Time tPHZ Output Disable Time tPLZ Units Output Disable Time ns ns ns ns ns ns Note 8: Voltage Range 3.3 is 3.3V ± 0.3V Voltage Range 5.0 is 5.0V ± 0.5V AC Electrical Characteristics 54ACT TA = −55˚C VCC Symbol Parameter (V) to +125˚C CL = 50 pF (Note 9) tPLH Propagation Delay Units Min Max 5.0 1.0 9.5 ns 5.0 1.0 9.0 ns Data to Output tPHL Propagation Delay Data to Output tPZH Output Enable Time 5.0 1.0 10.0 ns tPZL Output Enable Time 5.0 1.0 11.5 ns tPHZ Output Disable Time 5.0 1.0 11.0 ns tPLZ Output Disable Time 5.0 1.0 11.5 ns Note 9: Voltage Range 5.0 is 5.0V ± 0.5V Capacitance Symbol CIN CPD Typ Units Input Capacitance Parameter 4.5 pF Power Dissipation 45.0 pF Conditions VCC = OPEN VCC = 5.0V Capacitance 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 54AC240 • 54ACT240 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. 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