December 1996 74LVT2244 3.3V ABT Octal Buffer/Line Driver with TRI-STATEÉ Outputs General Description Features The LVT2244 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. The equivalent 25X-Series resistor helps reduce output overshoot and undershoot. These octal buffers and line drivers are designed for lowvoltage (3.3V) VCC applications, but with the capability to provide a TTL interface to a 5V environment. The LVT2244 is fabricated with an advanced BiCMOS technology to achieve high speed operation similar to 5V ABT while maintaining a low power dissipation. Y Y Y Y Y Y Y Y Input and output interface capability to systems at 5V VCC Bus-Hold data inputs eliminate the need for external pull-up resistors to hold unused inputs Equivalent 25X-Series resistor on outputs Live insertion/extraction permitted Power Up/Down high impedance provides glitch-free bus loading Outputs source/sink b12 mA/ a 12 mA Available in SOIC JEDEC, SOIC EIAJ, TSSOP and SSOPII Latch-up performance exceeds 500 mA Logic Symbol Connection Diagram Pin Assignment for SOIC, TSSOP and SSOPII IEEE/IEC TL/F/12170 – 2 TL/F/12170 – 1 Truth Tables Inputs OE1 In L L H L H X Outputs (Pins 12, 14, 16, 18) L H Z H e HIGH Voltage Level Pin Names OE1, OE2 I0 – I7 O0 – O7 Inputs L e LOW Voltage Level Description TRI-STATE Output Enable Inputs Inputs Outputs SOIC JEDEC OE2 In L L H L H X X e Immaterial SOIC EIAJ Outputs (Pins 3, 5, 7, 9) L H Z Z e High Impedance TSSOP JEDEC SSOPII Order 74LVT2244WM 74LVT2244SJ 74LVT2244MTC 74LVT2244MSA Number 74LVT2244WMX 74LVT2244SJX 74LVT2244MTCX 74LVT2244MSAX See NS Package Number M20B M20D MTC20 MSA20 TRI-STATEÉ is a registered trademark of National Semiconductor Corporation. C1996 National Semiconductor Corporation TL/F/12170 RRD-B30M17/Printed in U. S. A. http://www.national.com 74LVT2244 3.3V ABT Octal Buffer/Line Driver with TRI-STATE Outputs ADVANCE INFORMATION Absolute Maximum Ratings (Note 1) Symbol Parameter Value Conditions Units VCC Supply Voltage b 0.5 to a 7.0 VI DC Input Voltage b 0.5 to a 7.0 VO DC Output Voltage b 0.5 to a 7.0 Output in TRI-STATE V b 0.5 to a 7.0 Output in High or Low State (Note 2) V IIK DC Input Diode Current b 50 IOK DC Output Diode Current b 50 IO DC Output Current ICC DC Supply Current per Supply Pin IGND DC Ground Current per Ground Pin TSTG Storage Temperature V V VI k GND mA VO k GND mA 64 VO l VCC Output at High State mA 128 VO l VCC Output at Low State g 64 mA g 128 mA b 65 to a 150 §C Note 1: The Absolute Maximum Ratings are those values beyond which the safety of the device cannot be guaranteed. The device should not be operated at these limits. The parametric values defined in the ‘‘Electrical Characteristics’’ table are not guaranteed at the Absolute Maximum Ratings. The ‘‘Recommended Operating Conditions’’ table will define the conditions for actual device operation. Note 2: IO Absolute Maximum Rating must be observed. Recommended Operating Conditions Symbol Parameter Operating Data Retention Min Max Units 2.0 1.5 3.6 3.6 V 0 3.6 V 0 0 VCC 5.5 V VCC Supply Voltage VI Input Voltage VO Output Voltage IOH High-Level Output Current b 12 IOL Low-Level Output Current 12 HIGH or LOW State TRI-STATE TA Free-Air Operating Temperature Dt/DV Input Edge Rate, VIN e 0.8V–2.0V, VCC e 3.0V mA b 40 85 §C 0 10 ns/V DC Electrical Characteristics Symbol Parameter VCC (V) TA eb40§ C to a 85§ C Min Units Conditions Max VIK Input Clamp Diode Voltage VIH Input HIGH Voltage VIL Input LOW Voltage 2.7–3.6 VOH Output HIGH Voltage 2.7–3.6 VCC b 0.2 V IOH e b100 mA 3.0 2.0 V IOH e b12 mA VOL Output LOW Voltage http://www.national.com 2.7 Typ (Note 3) 2.7–3.6 b 1.2 2.0 V II e b18 mA V VO s 0.1V or VO t VCC b 0.1V 0.8 2.7 0.2 V IOL e 100 mA 3.0 0.8 V IOL e 12 mA 2 DC Electrical Characteristics Symbol II(HOLD) II(OD) II (Continued) T A eb40§ C to a 85§ C VCC (V) Parameter Bus-Hold Input Minimum Drive Min 3.0 Bus-Hold Input Over-Drive Current to Change State 3.0 Input Current 3.6 Control Pins Data Pins Typ (Note 3) Units Conditions Max 75 mA VI e 0.8V b 75 mA VI e 2.0V 500 mA (Note 4) b 500 mA (Note 5) 10 mA VI e 5.5V 3.6 g1 mA VI e 0V or VCC 3.6 b5 mA VI e 0V 1 mA VI e VCC IOFF Power Off Leakage Current 0 g 100 mA 0V s VI or VO s 5.5V IPU/PD (Note 6) Power up/down TRI-STATE Output Current 0 – 1.2V g 100 mA VO e 0.5V to VCC VI e GND or VCC IOZL TRI-STATE Output Leakage Current 3.6 b5 mA VO e 0.5V IOZH TRI-STATE Output Leakage Current 3.6 5 mA VO e 3.0V TRI-STATE Output Leakage Current 3.6 10 mA VCC k VO s 5.5V ICCH Power Supply Current 3.6 0.19 mA Outputs High ICCL Power Supply Current 3.6 12 mA Outputs Low ICCZ Power Supply Current 3.6 0.19 mA Outputs Disabled ICCZ a Power Supply Current 3.6 0.19 mA VCC s VO s 5.5V, Outputs Disabled DICC Increase in Power Supply Current (Note 7) 3.6 0.2 mA One Input at VCC b 0.6V Other Inputs at VCC or GND IOZH a Note 3: All typical values are at VCC e 3.3V, TA e 25§ C. Note 4: An external driver must source at least the specified current to switch from LOW to HIGH. Note 5: An external driver must sink at least the specified current to switch from HIGH to LOW. Note 6: This parameter is valid for any VCC between 0V and 1.2V at 25§ C only. Note 7: This is the increase in supply current for each input that is at the specified voltage level rather than VCC or GND. Dynamic Switching Characteristics (Note 8) Symbol VOLP VOLV Parameter Quiet Output Maximum Dynamic VOL Quiet Output Minimum Dynamic VOL TA e 25§ C VCC (V) Min Typ Units Conditions CL e 50 pF, RL e 500X Max 3.3 0.8 V (Note 9) 3.3 b 0.8 V (Note 9) Note 8: Characterized in SOIC package. Guaranteed parameter, but not tested. Note 9: Max number of outputs defined as (n). n b 1 data inputs are driven 0V to 3V. Output under test held LOW. 3 http://www.national.com AC Electrical Characteristics TA e b40§ C to a 85§ C CL e 50 pF, RL e 500X Symbol Parameter VCC e 3.3V g 0.3V Typ (Note 3) Min Units VCC e 2.7V Max Min Max tPLH tPHL Propagation Delay Data to Output 1.0 1.0 4.1 4.1 1.0 1.0 5.0 5.2 ns tPZH tPZL Output Enable Time 1.0 1.0 5.2 5.2 1.0 1.0 6.3 6.7 ns tPHZ tPLZ Output Disable Time 1.8 1.8 5.6 5.1 1.8 1.8 6.3 5.6 ns tOSHL tOSLH Output to Output Skew (Note 10) 1.0 ns Note 3: All typical values are at VCC e 3.3V, TA e 25§ C. Note 10: Skew is defined as the absolute value of the difference between the actual propagation delay for any two separate outputs of the same device. The specification applies to any outputs switching in the same direction, either HIGH to LOW (tOSHL) or LOW to HIGH (tOSLH). Parameter guaranteed by design. Capacitance (Note 11) Symbol Parameter Min Typ Max Units Conditions CIN Input Capacitance 4 pF VCC e 0V, VI e 0V or VCC COUT Output Capacitance 8 pF VCC e 3.0V, VO e 0V or VCC Note 11: Capacitance is measured at frequency f e 1 MHz, per MIL-STD-883B, Method 3012. 74LVT2244 Ordering Information The device number is used to form part of a simplified purchasing code where the package type and temperature range are defined as follows: TL/F/12170 – 3 http://www.national.com 4 Physical Dimensions inches (millimeters) unless otherwise noted 20-Lead (0.300× Wide) Molded Small Outline Package, JEDEC Order Number 74LVT2244WM or 74LVT2244WMX NS Package Number M20B 5 http://www.national.com Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 20-Lead (0.300× Wide) Molded Small Outline Package, EIAJ Order Number 74LVT2244SJ or 74LVT2244SJX NS Package Number M20D http://www.national.com 6 Physical Dimensions millimeters (Continued) 20-Lead Molded Shrink Small Outline Package, EIAJ Type II Order Number 74LVT2244MSA or 74LVT2244MSAX NS Package Number MSA20 7 http://www.national.com 74LVT2244 3.3V ABT Octal Buffer/Line Driver with TRI-STATE Outputs Physical Dimensions millimeters (Continued) 20-Lead Molded Thin Shrink Small Outline Package, JEDEC Order Number 74LVT2244MTC or 74LVT2244MTCX NS Package Number MTC20 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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