DP84240/DP84244 Octal TRI-STATEÉ MOS Drivers General Description Features The DP84240 and DP84244 are octal TRI-STATE drivers which are designed for heavy capacitive load applications such as fast data buffers or as memory address drivers. The DP84240 is an inverting driver which is pin-compatible with both the 74S240 and AM2965. The DP84244 is a non-inverting driver which is pin-compatible with the 74S244 and AM2966. These parts are fabricated using an oxide isolation process, for much faster speeds, and are specified for 250 pF and 500 pF load capacitances. Y Y Y Y Y Y Y Y tpd specified with 250 pF and 500 pF loads Output specified from 0.8V to 2.7V Designed for symmetric rise and fall times at 500 pF Outputs glitch free at power up and power down PNP inputs reduce DC loading on bus lines Low static and dynamic input capacitance Low skew times between edges and pins AC parameters specified with all outputs switching simultaneously TRI-STATEÉ is a registered trademark of National Semiconductor Corp. Connection Diagram Truth Table DP84240 Inputs Outputs Y G A H X Z L L H L H L H e High Level L e Low Level X e Don’t Care Z e High Impedance TL/F/5219 – 1 Top View Order Number DP84240J or DP84240N See NS Package Numbers J20A or N20A DP84244 G Inputs A Outputs Y H X Z L L L L H H TL/F/5219 – 2 Top View Order Number DP84244J or DP84244N See NS Package Numbers J20A or N20A C1995 National Semiconductor Corporation TL/F/5219 RRD-B30M105/Printed in U. S. A. DP84240/DP84244 Octal TRI-STATE MOS Drivers March 1986 Absolute Maximum Ratings (Note 1) Operating Conditions If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/Distributors for availability and specifications. VCC Supply Voltage TA Ambient Temperature Supply Voltage, VCC Min 4.5 0 Max 5.5 a 70 Units V §C 7.0V Logical ‘‘1’’ Input Voltage Logical ‘‘0’’ Input Voltage Storage Temperature Range Power Dissipation Cavity Package Molded Package Lead Temperature (soldering, 10 sec.) 7.0V b 1.5V b 65§ C to a 150§ C 1150 mW 1300 mW 300§ C Electrical Characteristics VCC e 5V g 10%, 0 s TA s 70§ C. (Notes 2 and 3.) Symbol Parameter VIN(1) Logical ‘‘1’’ Input Voltage VIN(0) Logical ‘‘0’’ Input Voltage IIN(1) Logical ‘‘1’’ Input Current Conditions Min Typ Max 2.0 VIN e 2.7V Units V 0.1 VIN e 7.0V 0.8 V 20 mA 100 mA IIN(0) Logical ‘‘0’’ Input Current 0 s VIN s 0.4V b 50 b 200 mA VCLAMP Input Clamp Voltage IIN e b18 mA b1 b 1.2 V VOH Logical ‘‘1’’ Output Voltage IOH e b100 mA IOH e b1 mA VOL Logical ‘‘0’’ Output Voltage IOL e 10 mA IOL e 12 mA I1D Logical ‘‘1’’ Drive Current VOUT e 1.5V b 75 b 250 mA I0D Logical ‘‘0’’ Drive Current VOUT e 1.5V a 100 a 150 mA Hi-Z TRI-STATE Output Current 0.4V s VOUT s 2.7V b 100 ICC Supply Current DP84240 All Outputs Open All Outputs High All Outputs Low All Outputs Hi-Z 16 74 80 50 125 125 All Outputs High All Outputs Low All Outputs Hi-Z 40 100 115 75 130 150 DP84244 VCC – 1.15 VCC b1.5 4.3 3.9 0.2 0.3 V 0.4 0.5 a 100 V mA mA Note 1: ‘‘Absolute Maximum Ratings’’ are those values beyond which the safety of the device cannot be guaranteed. Except for ‘‘Operating Temperature Range’’ they are not meant to imply that the devices should be operated at these limits. The table of ‘‘Electrical Characteristics’’ provides conditions for actual device operation. Note 2: All currents into device pins shown as positive; all currents out of device pins shown as negative; all voltages referenced to ground unless otherwise noted. All values shown as max. or min. are on an absolute value basis. Note 3: Typical characteristics are taken at VCC e 5.0V and TA e 25§ C. Note 4: The output-to-output skew is primarily a function of the number of outputs switching and the capacitive loading on those outputs. See Figures 5 and 6 for the switching time variations. 2 Switching Characteristics VCC e 5V g 10%, 0 s TA s 70§ C, all outputs loaded with specified load capacitance and all eight outputs switching simultaneously. (Note 3.) Symbol Parameter Conditions Min Typ Max Units CL e 250 pF CL e 500 pF 9 10 16 20 27 33 ns CL e 250 pF CL e 500 pF 9 12 16 20 25 31 ns Figures 2 & 4, S e 1, CL e 50 pF 11 24 ns Figures 2 & 4, S e 2, CL e 50 pF 12 24 ns Output Enable Time to LOW Figures 2 & 4, S e 1, CL e 500 pF 30 45 ns Output Enable Time to HIGH Figures 2 & 4, S e 2, CL e 500 pF 23 35 ns Output-to-Output Skew (Note 4) Figures 1 & 3, CL e 500 pF 3 tPLH Propagation Delay from LOW-to-HIGH Output tPHL Propagation Delay from HIGH-to-LOW Output tPLZ Output Disable Time from LOW tPHZ Output Disable Time from HIGH tPZL tPZH tSKEW Figures 1 & 3 ns Capacitance TA e 25§ C, f e 1 MHz, VCC e 5V g 10%. (Note 3.) Typ Units CIN Parameter All Other Inputs Tied Low Conditions 6 pF COUT Output in TRI-STATE Mode 20 pF Note 1: ‘‘Absolute Maximum Ratings’’ are those values beyond which the safety of the device cannot be guaranteed. Except for ‘‘Operating Temperature Range’’ they are not meant to imply that the devices should be operated at these limits. The table of ‘‘Electrical Characteristics’’ provides conditions for actual device operation. Note 2: All currents into device pins shown as positive; all currents out of device pins shown as negative; all voltages referenced to ground unless otherwise noted. All values shown as max. or min. are on an absolute value basis. Note 3: Typical characteristics are taken at VCC e 5.0V and TA e 25§ C. Note 4: The output-to-output skew is primarily a function of the number of outputs switching and the capacitive loading on those outputs. See Figures 5 and 6 for the switching time variations. 3 Switching Test Circuits TL/F/5219 – 3 TL/F/5219 – 4 *CL INCLUDES PROBE AND JIG CAPACITANCES FIGURE 1. Capacitive Load Switching FIGURE 2. TRI-STATE Enable/Disable Typical Switching Characteristics Voltage Waveforms TL/F/5219 – 5 TL/F/5219 – 6 FIGURE 3. Output Drive Levels FIGURE 4. TRI-STATE Control Levels TL/F/5219 – 7 TL/F/5219 – 8 FIGURE 5. tPLH Measured to 2.7V on Output vs. CL FIGURE 6. tPHL Measured to 0.8V on Output vs. CL 4 Typical Switching Characteristics (Continued) TL/F/5219 – 9 TL/F/5219 – 10 FIGURE 7. Typical Power Dissipation for DP84240 at VCC e 5.5V (All 8 drivers switching simultaneously) FIGURE 8. Typical Power Dissipation for DP84244 at VCC e 5.5V (All 8 drivers switching simultaneously) Typical Application DP84244 used as a buffer in a large memory array (greater than 88 dynamic RAMs) TL/F/5219 – 11 5 DP84240/DP84244 Octal TRI-STATE MOS Drivers Physical Dimensions inches (millimeters) 20-Lead Dual-In-Line Package (J) Order Number DP84240J/DP84244J NS Package Number J20A LIFE SUPPORT POLICY 20-Lead Dual-In-Line Package (N) Order Number DP84240N/DP84244N NS Package Number N20A 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: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and whose failure 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. National Semiconductor Corporation 1111 West Bardin Road Arlington, TX 76017 Tel: 1(800) 272-9959 Fax: 1(800) 737-7018 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. National Semiconductor Europe Fax: (a49) 0-180-530 85 86 Email: cnjwge @ tevm2.nsc.com Deutsch Tel: (a49) 0-180-530 85 85 English Tel: (a49) 0-180-532 78 32 Fran3ais Tel: (a49) 0-180-532 93 58 Italiano Tel: (a49) 0-180-534 16 80 National Semiconductor Hong Kong Ltd. 13th Floor, Straight Block, Ocean Centre, 5 Canton Rd. Tsimshatsui, Kowloon Hong Kong Tel: (852) 2737-1600 Fax: (852) 2736-9960 National Semiconductor Japan Ltd. Tel: 81-043-299-2309 Fax: 81-043-299-2408 National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications.