Revised February 2000 DM74157 Quad 2-Line to 1-Line Data Selectors/Multiplexer General Description Applications These data selectors/multiplexers contain inverters and drivers to supply full on-chip data selection to the four output gates. A separate strobe input is provided. A 4-bit word is selected from one of two sources and is routed to the four outputs. • Expand any data input point • Multiplex dual data buses • Generate four functions of two variables (one variable is common) • Source programmable counters Features ■ Buffered inputs and outputs ■ Typical propagation time 9 ns ■ Typical power dissipation 150 mW Ordering Code: Order Number Package Number DM74157N N16E Package Description 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide Logic Diagram Connection Diagram Function Table Inputs Output Y Strobe Select A B H X X X L L L X L L L H X H L H X L L L H X H H L H = HIGH Level, L = LOW Level, X = Don’t Care © 2000 Fairchild Semiconductor Corporation DS006550 www.fairchildsemi.com DM74157 Quad 2-Line to 1-Line Data Selectors/Multiplexer August 1986 DM74157 Absolute Maximum Ratings(Note 1) 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 Storage Temperature Range −65°C to +150°C Recommended Operating Conditions Symbol Parameter Min Nom Max Units 4.75 5 5.25 V LOW Level Input Voltage 0.8 V IOH HIGH Level Output Current −0.8 mA IOL LOW Level Output Current 16 mA TA Free Air Operating Temperature 70 °C VCC Supply Voltage VIH HIGH Level Input Voltage VIL 2 V 0 Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted) Symbol Parameter Conditions VI Input Clamp Voltage VCC = Min, II = −12 mA VOH HIGH Level VCC = Min, IOH = Max Output Voltage VIL = Max, VIH = Min VOL LOW Level VCC = Min, IOL = Max Min 2.4 Typ (Note 2) Max Units −1.5 V 3.4 V 0.4 V 1 mA Output Voltage VIH = Min, VIL = Max II Input Current @ Max Input Voltage VCC = Max, VI = 5.5V IIH HIGH Level Input Current VCC = Max, VI = 2.4V 40 µA IIL LOW Level Input Current VCC = Max, VI = 0.4V −1.6 mA IOS Short Circuit Output Current VCC = Max (Note 3) −55 mA ICC Supply Current VCC = Max (Note 4) 48 mA −18 30 Note 2: All typicals are at VCC = 5V, TA = 25°C. Note 3: Not more than one output should be shorted at a time. Note 4: ICC is measured with 4.5V applied to all inputs and all outputs OPEN. Switching Characteristics at VCC = 5V and TA = 25°C Symbol tPLH From (Input) Parameter To (Output) 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 2 RL = 400Ω, CL = 15 pF Min Max Units Data to Y 14 ns Data to Y 14 ns Strobe to Y 20 ns Strobe to Y 21 ns Select to Y 23 ns Select to Y 27 ns DM74157 Quad 2-Line to 1-Line Data Selectors/Multiplexer 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 3 www.fairchildsemi.com