DM54S257/DM74S257, DM54S258/DM74S258 TRI-STATEÉ Quad 1 of 2 Data Selectors/Multiplexers General Description Features These Schottky-clamped high-performance multiplexers feature TRI-STATE outputs that can interface directly with data lines of bus-organized systems. With all but one of the common outputs disabled (at a high impedance state), the low impedance of the single enabled output will drive the bus line to a high or low logic level. To minimize the possibility that two outputs will attempt to take a common bus to opposite logic levels, the output enable circuitry is designed such that the output disable times are shorter than the output enable times. This TRI-STATE output feature means that n-bit (paralleled) data selectors with up to 258 sources can be implemented for data buses. It also permits the use of standard TTL registers for data retention throughout the system. Y Y Y Y Y TRI-STATE versions S157, S158, with same pin-outs Schottky-clamped for significant improvement in A-C performance Provides bus interface from multiple sources in highperformance systems Average propagation delay from data input S257 4.8 ns S258 4 ns Typical power dissipation S257 320 mW S258 280 mW Connection Diagrams Dual-In-Line Package Dual-In-Line Package TL/F/6482 – 1 TL/F/6482 – 2 Order Number DM54S257J, DM54S258J, DM54S257W, DM74S257N or DM74S258N See NS Package Number J16A, N16E or W16A Function Table Inputs Output Y Output Control Select A B S257 S258 H L L L L X L L H H X L H X X X X X L H Z L H L H Z H L H L H e High Level, L e Low Level, X e Don’t Care Z e High Impedance (off) TRI-STATEÉ is a registered trademark of National Semiconductor Corporation. C1995 National Semiconductor Corporation TL/F/6482 RRD-B30M105/Printed in U. S. A. DM54S257/DM74S257, DM54S258/DM74S258 TRI-STATE Quad 1 of 2 Data Selectors/Multiplexers 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 DM54S DM74S 0§ C to a 70§ C b 65§ C to a 150§ C Storage Temperature Range Recommended Operating Conditions Symbol DM54S257 Parameter DM74S257 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 6.5 mA IOL Low Level Output Current 20 mA TA Free Air Operating Temperature 70 §C 2 V 2 V 20 b 55 125 0 ’S257 Electrical Characteristics over recommended operating free air temperature (unless otherwise noted) Symbol Parameter Min Typ (Note 1) DM54 2.4 3.4 DM74 2.4 3.2 Conditions Max Units b 1.2 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 VIH e Min, VIL e Max II Input Current @ Max Input Voltage VCC e Max, VI e 5.5V IIH High Level Input Current VCC e Max VI e 2.7V Select 100 Other 50 Low Level Input Current VCC e Max, VI e 0.5V Select b4 Other b2 Off-State Output Current with High Level Output Voltage Applied VCC e Max, VO e 2.4V VIH e Min, VIL e Max 50 mA Off-State Output Current with Low Level Output Voltage Applied VCC e Max, VO e 0.5V VIH e Min, VIL e Max b 50 mA Short Circuit Output Current VCC e Max (Note 2) ICCH Supply Current with Outputs High VCC e Max (Note 3) 44 68 mA ICCL Supply Current with Outputs Low VCC e Max (Note 3) 60 93 mA Supply Current with Outputs Disabled VCC e Max (Note 3) 64 99 mA IIL IOZH IOZL IOS ICCZ 0.5 V 1 mA DM54 b 40 b 100 DM74 b 40 b 100 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 3: ICC is measured with all outputs open and all possible inputs grounded, while achieving the stated output conditions. 2 V mA mA mA ’S257 Switching Characteristics at VCC e 5V and TA e 25§ C (See Section 1 for Test Waveforms and Output Load) Symbol RL e 280X From (Input) To (Output) Parameter CL e 15 pF Min CL e 50 pF Max Min Units Max tPLH Propagation Delay Time Low to High Level Output Data to Output 7.5 11 ns tPHL Propagation Delay Time High to Low Level Output Data to Output 6.5 10 ns tPLH Propagation Delay Time Low to High Level Output Select to Output 15 16 ns tPHL Propagation Delay Time High to Low Level Output Select to Output 15 16 ns tPZH Output Enable Time to High Level Output Output Control to Y 19.5 23 ns tPZL Output Enable Time to Low Level Output Output Control to Y 21 24 ns tPHZ Output Disable Time to High Level Output (Note 1) Output Control to Y 8.5 ns tPLZ Output Disable Time to Low Level Output (Note 1) Output Control to Y 14 ns Note 1: CL e 5 pF. Recommended Operating Conditions Symbol DM54S258 Parameter DM74S258 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 6.5 mA IOL Low Level Output Current 20 20 mA 70 §C TA 2 Free Air Operating Temperature 2 b 55 125 V V 0 ’S258 Electrical Characteristics over recommended operating free air temperature (unless otherwise noted) Symbol VI Parameter Conditions Min Typ (Note 1) Max Units b 1.2 V Input Clamp Voltage VCC e Min, II e b18 mA 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 VCC e Max, VI e 5.5V IIH High Level Input Current VCC e Max, VI e 2.7V Select 100 Other 50 Low Level Input Current VCC e Max, VI e 0.5V Select b4 Other b2 VOH IIL 3 DM54 2.4 3.4 DM74 2.4 3.2 V 0.5 V 1 mA mA mA ’S258 Electrical Characteristics over recommended operating free air temperature (unless otherwise noted) (Continued) Symbol IOZH Parameter Conditions Min Typ (Note 1) Max Units Off-State Output Current with High Level Output Voltage Applied VCC e Max, VO e 2.4V VIH e Min, VIL e Max 50 mA Off-State Output Current with Low Level Output Voltage Applied VCC e Max, VO e 0.5V VIH e Min, VIL e Max b 50 mA Short Circuit Output Current VCC e Max (Note 2) ICCH Supply Current with Outputs High VCC e Max (Note 3) 36 56 mA ICCL Supply Current with Outputs Low VCC e Max (Note 3) 52 81 mA ICCZ Supply Current with Outputs Disabled VCC e Max (Note 3) 56 87 mA IOZL IOS DM54 b 40 b 100 DM74 b 40 b 100 mA 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 3: ICC is measured with all outputs open and all possible inputs grounded, while achieving the stated output conditions. ’S258 Switching Characteristics at VCC e 5V and TA e 25§ C (See Section 1 for Test Waveforms and Output Load) Symbol Parameter From (Input) To (Output) RL e 280X CL e 15 pF Min Max CL e 50 pF Min Units Max tPLH Propagation Delay Time Low to High Level Output Data to Output 6 9 ns tPHL Propagation Delay Time High to Low Level Output Data to Output 6 9 ns tPLH Propagation Delay Time Low to High Level Output Select to Output 12 15 ns tPHL Propagation Delay Time High to Low Level Output Select to Output 12 15 ns tPZH Output Enable Time to High Level Output Output Control to Y 19.5 23 ns tPZL Output Enable Time to Low Level Output Output Control to Y 21 24 ns tPHZ Output Disable Time to High Level Output (Note 1) Output Control to Y 8.5 ns tPLZ Output Disable Time to Low Level Output (Note 1) Output Control to Y 14 ns Note 1: CL e 5 pF. 4 Logic Diagrams S257 TL/F/6482 – 3 S258 TL/F/6482 – 4 5 6 Physical Dimensions inches (millimeters) 16-Lead Ceramic Dual-In-Line Package (J) Order Numbers DM54S257J or DM54S258J NS Package Number J16A 16-Lead Molded Dual-In-Line Package (N) Order Numbers DM74S257N or DM74S258N NS Package Number N16E 7 DM54S257/DM74S257, DM54S258/DM74S258 TRI-STATE Quad 1 of 2 Data Selectors/Multiplexers Physical Dimensions inches (millimeters) (Continued) 16-Lead Ceramic Flat Package (W) Order Number DM54S257W 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. 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.