54AC244,54ACT244 54AC244/54ACT244 Octal Buffer/Line Driver with TRI-STATE Outputs Literature Number: SNOS098B July 29, 2011 54AC244/54ACT244 Octal Buffer/Line Driver with TRI-STATE® Outputs General Description Features 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. ■ ICC and IOZ reduced by 50% ■ TRI-STATE outputs drive bus lines or buffer memory ■ ■ ■ ■ Logic Symbol address registers Outputs source/sink 24 mA 'ACT244 has TTL-compatible inputs Standard Microcircuit Drawing (SMD) — 'AC244: 5962-87552 — 'ACT244: 5962-87760 54AC244 now qualified to 300Krad RHA designation, refer to the SMD for more information Pin Names IEEE/IEC Description OE1, OE2 TRI-STATE Output Enable Inputs I0–I7 Inputs O0–O7 Outputs 10028201 TRI-STATE® is a registered trademark of National Semiconductor Corporation. FACT™ is a trademark of Fairchild Semiconductor © 2011 National Semiconductor Corporation 100282 100282 Version 3 Revision 1 www.national.com Print Date/Time: 2011/07/29 21:07:23 54AC244/54ACT244 Octal Buffer/Line Driver with TRI-STATE Outputs OBSOLETE 54AC244 • 54ACT244 Connection Diagrams Truth Table Inputs Pin Assignment for DIP and Flatpak Outputs OE1 In (Pins 12, 14, 16, 18) L L H L H X L H Z H = HIGH Voltage Level L = LOW Voltage Level Inputs In (Pins 3, 5, 7, 9) L L H L H X L H Z X = Immaterial Z = High Impedance 10028202 Pin Assignment for LCC 10028203 www.national.com 2 100282 Version 3 Revision 1 Outputs OE2 Print Date/Time: 2011/07/29 21:07:23 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 −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 Minimum Input Edge Rate (ΔV/Δt) 'AC Devices VIN from 30% to 70% of VCC VCC @ 3.3V, 4.5V, 5.5V 125 mV/ns Minimum Input Edge Rate (ΔV/Δt) 'ACT Devices VIN from 0.8V to 2.0V VCC @ 4.5V, 5.5V 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 54AC Symbol Parameter VCC TA = (V) −55°C to +125°C Units Conditions Guaranteed Limits VIH VIL VOH Minimum High 3.0 2.1 Level Input 4.5 3.15 Voltage 5.5 3.85 Maximum Low 3.0 0.9 Level Input 4.5 1.35 Voltage 5.5 1.65 Minimum High 3.0 2.9 Level Output Voltage 4.5 5.5 4.4 5.4 VOUT = 0.1V V or VCC − 0.1V VOUT = 0.1V V or VCC − 0.1V IOUT = −50 μA V (Note 2) VIN = VIL or VIH VOL 3.0 4.5 2.4 3.7 5.5 4.7 Maximum Low 3.0 0.1 Level Output Voltage 4.5 5.5 0.1 0.1 V −12 mA −24 mA IOH −24 mA IOUT = 50 μA V (Note 2) VIN = VIL or VIH 3.0 4.5 IIN Maximum Input 0.50 0.50 5.5 0.50 5.5 ±1.0 V 12 mA 24 mA IOL 24 mA μA VI = VCC, GND Leakage Current 3 100282 Version 3 Revision 1 Print Date/Time: 2011/07/29 21:07:23 www.national.com 54AC244 • 54ACT244 Absolute Maximum Ratings (Note 1) 54AC244 • 54ACT244 54AC Symbol Parameter VCC TA = (V) −55°C to +125°C Units Conditions Guaranteed Limits IOZ Maximum VI (OE) = VIL, VIH TRI-STATE 5.5 ±5.0 μA Current IOLD VI = VCC, VGND VO = VCC, GND (Note 3) Minimum Dynamic Output Current 5.5 50 mA VOLD = 1.65V Max IOHD 5.5 −50 mA 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. Note 5: ICC for 54AC @ 25°C is identical to 74AC @ 25°C. DC Characteristics for 'ACT Family Devices 54ACT Symbol Parameter VCC 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 or VCC − 0.1V V VOUT = 0.1V or VCC − 0.1V V IOUT = −50 μA (Note 6) VIN = VIL or VIH VOL 4.5 3.70 5.5 4.70 Maximum Low Level 4.5 0.1 Output Voltage 5.5 0.1 IOH V −24 mA −24 mA V IOUT = 50 μA (Note 6) VIN = VIL or VIH 4.5 0.50 5.5 0.50 V IOL 24 mA IIN Maximum Input Leakage Current 5.5 ±1.0 μA VI = VCC, GND IOZ Maximum TRI-STATE 5.5 ±5.0 μA VI = VIL, VIH Current VO = VCC, GND ICCT Maximum ICC/Input 5.5 1.6 mA VI = VCC − 2.1V IOLD 5.5 50 mA VOLD = 1.65V Max IOHD (Note 7) Minimum Dynamic Output Current 5.5 −50 mA VOHD = 3.85V Min ICC Maximum Quiescent 5.5 80.0 μA VIN = VCC Supply Current or GND 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. www.national.com 4 100282 Version 3 Revision 1 24 mA Print Date/Time: 2011/07/29 21:07:23 54AC Symbol tPLH tPHL tPZH tPZL tPHZ tPLZ Parameter VCC TA = −55°C (V) (Note 9) to +125°C CL = 50 pF Fig. Units Min Max Propagation Delay 3.3 1.0 12.5 Data to Output 5.0 1.0 9.5 Propagation Delay 3.3 1.0 12.0 Data to Output 5.0 1.0 9.0 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 13.0 5.0 1.0 11.0 Output Enable Time Output Disable Time Output Disable Time No. ns ns ns ns ns ns Note 9: Voltage Range 3.3 is 3.3V ±0.3V Voltage Range 5.0 is 5.0V ±0.5V AC Electrical Characteristics 54ACT Symbol tPLH Parameter Propagation Delay VCC TA = −55°C (V) (Note 10) to +125°C CL = 50 pF Fig. Units Min Max 5.0 1.0 10.0 ns 5.0 1.0 10.0 ns No. Data to Output tPHL Propagation Delay Data to Output tPZH Output Enable Time 5.0 1.0 9.5 ns tPZL Output Enable Time 5.0 1.0 11.0 ns tPHZ Output Disable Time 5.0 1.0 11.0 ns tPLZ Output Disable Time 5.0 1.0 11.5 ns Note 10: Voltage Range 5.0 is 5.0V ±0.5V Capacitance Typ Units CIN Symbol Input Capacitance Parameter 4.5 pF VCC = OPEN Conditions CPD Power Dissipation 45.0 pF VCC = 5.0V Capacitance 5 100282 Version 3 Revision 1 Print Date/Time: 2011/07/29 21:07:23 www.national.com 54AC244 • 54ACT244 AC Electrical Characteristics 54AC244 • 54ACT244 Physical Dimensions inches (millimeters) unless otherwise noted 20-Terminal Ceramic Leadless Chip Carrier (L) NS Package Number E20A www.national.com 6 100282 Version 3 Revision 1 Print Date/Time: 2011/07/29 21:07:23 54AC244 • 54ACT244 20-Lead Ceramic Dual-In-Line Package (D) NS Package Number J20A 20-Lead Ceramic Flatpak (F) NS Package Number W20A 7 100282 Version 3 Revision 1 Print Date/Time: 2011/07/29 21:07:23 www.national.com 54AC244/54ACT244 Octal Buffer/Line Driver with TRI-STATE Outputs Notes For more National Semiconductor product information and proven design tools, visit the following Web sites at: www.national.com Products Design Support Amplifiers www.national.com/amplifiers WEBENCH® Tools www.national.com/webench Audio www.national.com/audio App Notes www.national.com/appnotes Clock and Timing www.national.com/timing Reference Designs www.national.com/refdesigns Data Converters www.national.com/adc Samples www.national.com/samples Interface www.national.com/interface Eval Boards www.national.com/evalboards LVDS www.national.com/lvds Packaging www.national.com/packaging Power Management www.national.com/power Green Compliance www.national.com/quality/green Switching Regulators www.national.com/switchers Distributors www.national.com/contacts LDOs www.national.com/ldo Quality and Reliability www.national.com/quality LED Lighting www.national.com/led Feedback/Support www.national.com/feedback Voltage References www.national.com/vref Design Made Easy www.national.com/easy www.national.com/powerwise Applications & Markets www.national.com/solutions Mil/Aero www.national.com/milaero PowerWise® Solutions Serial Digital Interface (SDI) www.national.com/sdi Temperature Sensors www.national.com/tempsensors SolarMagic™ www.national.com/solarmagic PLL/VCO www.national.com/wireless www.national.com/training PowerWise® Design University THE CONTENTS OF THIS DOCUMENT ARE PROVIDED IN CONNECTION WITH NATIONAL SEMICONDUCTOR CORPORATION (“NATIONAL”) PRODUCTS. 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