54LS368A/DM54LS368A/DM74LS368A Hex TRI-STATEÉ Inverting Buffers General Description This device contains six independent gates each of which performs an inverting buffer function. The outputs have the TRI-STATE feature. When enabled, the outputs exhibit the low impedance characteristics of a standard LS output with additional drive capability to permit the driving of bus lines without external resistors. When disabled, both the output transistors are turned off presenting a high-impedance state to the bus line. Thus the output will act neither as a significant load nor as a driver. To minimize the possibility that two outputs will attempt to take a common bus to opposite logic levels, the disable time is shorter than the enable time of the outputs. Features Y Alternate Military/Aerospace device (54LS368) is available. Contact a National Semiconductor Sales Office/ Distributor for specifications. Connection Diagram Dual-In-Line Package TL/F/6430 – 1 Order Number 54LS368ADMQB, 54LS368AFMQB, 54LS368ALMQB, DM54LS368AJ, DM54LS368AW, DM74LS368AM or DM74LS368AN See NS Package Number E20A, J16A, M16A, N16E or W16A Function Table YeA Inputs Output A G Y L H X L L H H L Hi-Z H e High Logic Level L e Low Logic Level X e Either Low or High Logic Level Hi-Z e TRI-STATE (Outputs are disabled) TRI-STATEÉ is a registered trademark of National Semiconductor Corporation. C1995 National Semiconductor Corporation TL/F/6430 RRD-B30M105/Printed in U. S. A. 54LS368A/DM54LS368A/DM74LS368A Hex TRI-STATE Inverting Buffers May 1989 Absolute Maximum Ratings (Note) Note: 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. If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/Distributors for availability and specifications. Supply Voltage 7V Input Voltage 7V Operating Free Air Temperature Range b 55§ C to a 125§ C DM54LS and 54LS DM74LS 0§ C to a 70§ C Storage Temperature Range b 65§ C to a 150§ C Recommended Operating Conditions Symbol DM54LS368A Parameter DM74LS368A Units Min Nom Max Min Nom Max 4.5 5 5.5 4.75 5 5.25 VCC Supply Voltage VIH High Level Input Voltage VIL Low Level Input Voltage 0.7 0.8 V IOH High Level Output Current b1 b 2.6 mA IOL Low Level Output Current 24 mA TA Free Air Operating Temperature 70 §C 2 2 V 12 b 55 125 V 0 Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted) Symbol Parameter Conditions Min Typ (Note 1) Max Units b 1.5 V VI Input Clamp Voltage VCC e Min, II e b18 mA VOH High Level Output Voltage VCC e Min, IOH e Max VIL e Max, VIH e Min VOL Low Level Output Voltage VCC e Min, IOL e Max VIL e Max, VIH e Min DM54 0.25 0.4 DM74 0.35 0.5 IOL e 12 mA, VCC e Min DM74 0.25 0.4 2.4 3.4 V V II Input Current @ Max Input Voltage VCC e Max, VI e 7V 0.1 mA IIH High Level Input Current VCC e Max, VI e 2.7V 20 mA IIL Low Level Input Current VCC e Max, VI e 0.5V (Note 4) A Input b 20 mA VCC e Max, VI e 0.4V (Note 5) A Input VCC e Max, VI e 0.4V VCC e Max, VO e 2.4V VIH e Min, VIL e Max G Input IOZH IOZL IOS ICC Off-State Output Current with High Level Output Voltage Applied Off-State Output Current with Low Level Output Voltage Applied VCC e Max, VO e 0.4V VIH e Min, VIL e Max Short Circuit Output Current VCC e Max (Note 2) Supply Current VCC e Max (Note 3) b 0.4 2 mA b 20 mA b 20 b 100 DM74 b 20 b 100 Note 3: ICC is measured with the DATA inputs grounded and the OUTPUT CONTROLS at 4.5V. Note 5: Both G inputs at 0.4V. 20 DM54 Note 1: All typicals are at VCC e 5V, TA e 25§ C. Note 2: Not more than one output should be shorted at a time, and the duration should not exceed one second. Note 4: Both G inputs are at 2V. mA b 0.4 12 21 mA mA Switching Characteristics at VCC e 5V and TA e 25§ C (See Section 1 for Test Waveforms and Output Load) RL e 667X Symbol Parameter CL e 50 pF Min Max CL e 150 pF Min Units Max tPLH Propagation Delay Time Low to High Level Output 15 25 ns tPHL Propagation Delay Time High to Low Level Output 18 25 ns tPZH Output Enable Time to High Level Output 30 35 ns tPZL Output Enable Time to Low Level Output 30 40 ns tPHZ Output Disable Time from High Level Output (Note 6) 20 ns tPLZ Output Disable Time from Low Level Output (Note 6) 20 ns Note 6: CL e 5 pF. 3 Physical Dimensions inches (millimeters) Ceramic Leadless Chip Carrier Package (E) Order Number 54LS368ALMQB NS Package Number E20A 16-Lead Ceramic Dual-In-Line Package (J) Order Number 54LS368ADMQB or DM54LS368AJ NS Package Number J16A 4 Physical Dimensions inches (millimeters) (Continued) 16-Lead Small Outline Molded Package (M) Order Number DM74LS368AM NS Package Number M16A 16-Lead Molded Dual-In-Line Package (N) Order Number DM74LS368AN NS Package Number N16E 5 54LS368A/DM54LS368A/DM74LS368A Hex TRI-STATE Inverting Buffers Physical Dimensions inches (millimeters) (Continued) 16-Lead Ceramic Flat Package (W) Order Number 54LS368AFMQB or DM54LS368AW NS Package Number W16A 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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