54125/DM54125/DM74125 Quad TRI-STATEÉ Buffers General Description This device contains four independent gates each of which performs a non-inverting buffer function. The outputs have the TRI-STATE feature. When enabled, the outputs exhibit the low impedance characteristics of a standard TTL output with additional drive capability at the high Logic level to permit the driving of bus lines without external pull-up 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 (54125) is available. Contact a National Semiconductor Sales Office/ Distributor for specifications. Connection Diagram Dual-In-Line Package TL/F/6540 – 1 Order Number 54125DMQB, 54125FMQB, DM54125J, DM54125W or DM74125N See NS Package Number J14A, N14A or W14B Function Table YeA Inputs Output A C Y L H X L L H L H 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/6540 RRD-B30M105/Printed in U. S. A. 54125/DM54125/DM74125 Quad TRI-STATE Buffers June 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 5.5V Operating Free Air Temperature Range b 55§ C to a 125§ C DM54 and 54 DM74 0§ C to a 70§ C Storage Temperature Range b 65§ C to a 150§ C Recommended Operating Conditions Symbol DM54125 Parameter DM74125 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 0.8 0.8 V IOH High Level Output Current b2 b 5.2 mA IOL Low Level Output Current 16 mA TA Free Air Operating Temperature 70 §C 2 2 V 16 b 55 125 V 0 Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted) Symbol Parameter Conditions VI Input Clamp Voltage VCC e Min, II e b12 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 VIH e Min, VIL e Max II Input Current @ Max Input Voltage IIH High Level Input Current IIL Low Level Input Current IIZL Off-State Input Current with Low Level Input Voltage Applied VCC e Max, VI e 0.4V Off-State Output Current with High Level Output Voltage Applied IOZH IOZL IOS ICC Min 2.4 Typ (Note 1) Max Units b 1.5 V 3.3 0.2 V 0.4 V VCC e Max, VI e 5.5V 1 mA VCC e Max, VI e 2.4V VCC e Max, VI e 0.4V 40 mA b 1.6 mA b 40 mA VCC e Max, VO e 2.4V VIH e Min, VIL e Max 40 mA Off-State Output Current with Low Level Output Voltage Applied VCC e Max, VO e 0.4V VIH e Min, VIL e Max b 40 mA Short Circuit Output Current VCC e Max (Note 2) Supply Current VCC e Max (Note 3) DM54 b 30 b 70 DM74 b 28 b 70 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. Note 3: ICC is measured with the output control (C) inputs at 4.5V, the data inputs grounded, and the outputs open. 2 36 54 mA mA Switching Characteristics at VCC e 5V and TA e 25§ C (See Section 1 for Test Waveforms and Output Load) RL e 400X Symbol Parameter CL e 5 pF Min CL e 50 pF Max Min Units Max tPLH Propagation Delay Time Low to High Level Output 15 ns tPHL Propagation Delay Time High to Low Level Output 18 ns tPZH Output Enable Time to High Level Output 18 ns tPZL Output Enable Time to Low Level Output 25 ns tPHZ Output Disable Time from High Level Output 8 ns tPLZ Output Disable Time from Low Level Output 14 ns Physical Dimensions inches (millimeters) 14-Lead Ceramic Dual-In-Line Package (J) Order Number 54125DMQB or DM54125J NS Package Number J14A 3 54125/DM54125/DM74125 Quad TRI-STATE Buffers Physical Dimensions inches (millimeters) (Continued) 14-Lead Molded Dual-In-Line Package (N) Order Number DM74125N NS Package Number N14A 14-Lead Ceramic Flat Package (W) Order Number 54125FMQB or DM54125W NS Package Number W14B 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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