Revised April 2000 DM74S151 1-of-8 Data Selector/Multiplexer with Complementary Outputs General Description Features These data selectors/multiplexers contain full on-chip decoding to select the desired data source. The DM74S151 selects one-of-eight data sources. The DM74S151 has a strobe input which must be at a low logic level to enable these devices. A high level at the strobe forces the W output HIGH and the Y output LOW. ■ Select one-of-eight data lines The DM74S151 features complementary W and Y outputs. ■ Performs parallel-to-serial conversion ■ Permits multiplexing from N lines to one line ■ Also for use as Boolean function generator ■ Typical average propagation delay time, data input to W output 4.5 ns ■ Typical power dissipation 225 mW Ordering Code: Order Number DM74S151N Package Number N16E Package Description 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide Connection Diagram Function Table Inputs Select Outputs Strobe Y W C B A S X X X H L H L L L L D0 D0 L L H L D1 D1 L H L L D2 D2 L H H L D3 D3 H L L L D4 D4 H L H L D5 D5 H H L L D6 D6 H H H L D7 D7 H = HIGH Level L = LOW Level X = Don’t Care D0, D1…D7 = The level of the respective D input © 2000 Fairchild Semiconductor Corporation DS006468 www.fairchildsemi.com DM74S151 1-of-8 Data Selector/Multiplexer with Complementary Outputs August 1986 DM74S151 Logic Diagram www.fairchildsemi.com 2 Supply Voltage 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 tables are not guaranteed at the absolute maximum ratings. The “Recommended Operating Conditions” table will define the conditions for actual device operation. 7V Input Voltage 5.5V 0°C to +70°C Operating Free Air Temperature Range −65°C to +150°C Storage Temperature Range Recommended Operating Conditions Symbol Parameter Min Nom Max 4.75 5 5.25 Units VCC Supply Voltage VIH HIGH Level Input Voltage VIL LOW Level Input Voltage 0.8 V IOH HIGH Level Output Current −1 mA IOL LOW Level Output Current 20 mA TA Free Air Operating Temperature 70 °C V 2 V 0 Electrical Characteristics over recommended operating free air temperature (unless otherwise noted) Symbol Parameter Conditions VI Input Clamp Voltage VCC = Min, II = −18 mA VOH HIGH Level VCC = Min, IOH = Max, Output Voltage VIL = Max, VIH = Min VOL LOW Level VCC = Min, IOL = Max Output Voltage VIH = Min, VIL = Max Min Typ (Note 2) Max −1.2 2.7 3.4 Units V V 0.5 V mA II Input Current @ Max Input Voltage VCC = Max, VI = 5.5V 1 IIH HIGH Level Input Current VCC = Max, VI = 2.7V 50 µA IIL LOW Level Input Current VCC = Max, VI = 0.5V −2 mA IOS Short Circuit Output Current VCC = Max (Note 3) −100 mA ICC Supply Current VCC = Max (Note 4) 70 mA −40 45 Note 2: All typicals are at VCC = 5V, TA = 25°C. Note 3: Not more than one output should be shorted at a time, and the duration should not exceed one second. Note 4: ICC is measured with the strobe and data select inputs at 4.5V, all other inputs and outputs OPEN. 3 www.fairchildsemi.com DM74S151 Absolute Maximum Ratings(Note 1) DM74S151 Switching Characteristics at VCC = 5V and TA = 25°C RL = 280Ω Symbol Parameter CL = 15 pF From (Input) To (Output) tPLH Propagation Delay Time LOW-to-HIGH Level Output tPHL Propagation Delay Time HIGH-to-LOW Level Output tPLH Propagation Delay Time LOW-to-HIGH Level Output tPHL Propagation Delay Time HIGH-to-LOW Level Output tPLH Propagation Delay Time LOW-to-HIGH Level Output tPHL Propagation Delay Time HIGH-to-LOW Level Output tPLH Propagation Delay Time LOW-to-HIGH Level Output tPHL Propagation Delay Time HIGH-to-LOW Level Output tPLH Propagation Delay Time LOW-to-HIGH Level Output tPHL Propagation Delay Time HIGH-to-LOW Level Output tPLH Propagation Delay Time LOW-to-HIGH Level Output tPHL Propagation Delay Time HIGH-to-LOW Level Output www.fairchildsemi.com Min CL = 50 pF Max Min Units Max Select to Y (4 Levels) 18 21 ns Select to Y (4 Levels) 18 21 ns Select to W (3 Levels) 15 18 ns Select to W (3 Levels) 13.5 17 ns Strobe to Y 16.5 19 ns Strobe to Y 18 21 ns Strobe to W 13 16 ns Strobe to W 12 16 ns D0 thru D7 to Y 12 15 ns D0 thru D7 to Y 12 15 ns D0 thru D7 to W 7 9 ns D0 thru D7 to W 7 10 ns 4 DM74S151 1-of-8 Data Selector/Multiplexer with Complementary Outputs Physical Dimensions inches (millimeters) unless otherwise noted 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide Package Number N16E Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and Fairchild reserves the right at any time without notice to change said circuitry and specifications. LIFE SUPPORT POLICY FAIRCHILD’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 FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 2. A critical component in 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. 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 (c) 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. www.fairchildsemi.com 5 www.fairchildsemi.com