74157 Quad 2-to-1 Data Selector/Multiplexer PDIP-16

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74157 Quad 2-to-1 Data Selector/ Multiplexer PDIP-16 The 74157 Quad 2-to-1 Data Selector/Multiplexer PDIP-16 is a high-speed, low-power Schottky TTL quad multiplexer provided in a PDIP-16 through-hole package, designed to select a four-bit word from one of two sources using a single common select input and an active-low enable (strobe) for bus, address and data-selection applications. 74LS157 is a 2-input (2:1) Multiplexer IC. It has four similar multiplexers inside it and hence it is called a Quad package 2-Input Multiplexer. A Multiplexer as we know takes in 2 or more inputs and provides one of them as the output based on the Select line status. Features: Four independent 2-to-1 data selectors with buffered non-inverting outputs suitable for true data routing applications. Single common Select input for simultaneous channel selection across all four channels. Active-low enable (strobe) to place all outputs in the high-impedance state for bus sharing and multiplexed systems. Low-power Schottky (LS) TTL technology with standard 5V supply compatibility. Industry standard PDIP-16 footprint for easy through-hole prototyping and retrofit replacement. Pinout Diagram: Pin Name Description 2,5,11,14 Input A This is the first input line of the 2:1 Multiplexer 3,6,10,13 Input B This is the second input line of the 2:1 Multiplexer 4,7,9,12 Output Y This is the output line pin of the Multiplexer 1 Line Select (S) The select pin selects one of the two input lines and gives it to the output line 15 Enable (E) Active low pin. Grounded for normal operation 8 Ground Connected to the ground of the system 16 Vcc This pin powers the IC, typically +5V is used Specifications: Absolute Maximum Ratings Parameter Value Unit / Notes Supply voltage, V CC (Note 1) 7 V Input voltage 7 V Operating free-air temperature range 0 to +70 °C Storage temperature range -65 to +150 °C Note 1: Voltage values are with respect to network ground terminal. Recommended Operating Conditions Symbol Parameter Min. Nom. Max. Unit V CC Supply voltage 4.75 5 5.25 V I OH High-level output current -800 µA I OL Low-level output current 16 mA T A Operating free-air temperature 0 70 °C Complete technical details can be found in the 74HC157 datasheet given at the end of this page. Applications: Multiplexing and selection of 4-bit data or address buses in microprocessor systems. Bus isolation and sharing where multiple devices drive a common bus. Glue logic and combinational data routing in digital control systems. Memory and peripheral address/data selection. Prototyping and educational digital logic projects where an industry-standard PDIP is required. Package Contents: 1x 74157 Quad 2-to-1 Data Selector/Multiplexer PDIP-16 Documents: Datasheet SN74LS157N CAD Files Download