Overview
The SN74LS157DR is a Quadruple 2-Line to 1-Line Data Selectors/Multiplexers produced by Texas Instruments. This integrated circuit is designed to select a 4-bit word from one of two sources and route it to the four output gates. It features buffered inputs and outputs, and includes inverters and drivers to ensure full on-chip data selection. The SN74LS157DR is part of the 74LS series, known for its low power consumption and high speed.
Key Specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | 16-SOIC (0.154", 3.90mm Width) |
| Operating Temperature Range | 0°C to 70°C |
| Supply Voltage | 4.75 V to 5.25 V |
| Mounting Type | Surface Mount |
| Current - Output High, Low | 400µA, 8mA |
| Circuit Type | 4 x 2:1 Multiplexer |
| Independent Circuits | 1 |
| Number of Pins | 16 |
Key Features
- Buffered Inputs and Outputs
- Three Speed/Power Ranges Available
- Separate Strobe Input Provided
- Presents True Data (Unlike LS158 and S158 which present inverted data)
Applications
- Expand Any Data Input Point
- Multiplex Dual Data Buses
- Generate Four Functions of Two Variables (One Variable Is Common)
- Source Programmable Counters
Q & A
- What is the primary function of the SN74LS157DR?
The primary function of the SN74LS157DR is to select a 4-bit word from one of two sources and route it to the four output gates.
- What is the package type of the SN74LS157DR?
The package type is 16-SOIC (0.154", 3.90mm Width).
- What is the operating temperature range of the SN74LS157DR?
The operating temperature range is 0°C to 70°C.
- What is the supply voltage range for the SN74LS157DR?
The supply voltage range is 4.75 V to 5.25 V.
- Does the SN74LS157DR present true or inverted data?
The SN74LS157DR presents true data.
- What are some common applications of the SN74LS157DR?
Common applications include expanding any data input point, multiplexing dual data buses, generating four functions of two variables, and sourcing programmable counters.
- What is the mounting type of the SN74LS157DR?
The mounting type is Surface Mount.
- What is the current output high and low for the SN74LS157DR?
The current output high is 400µA and low is 8mA.
- Is the SN74LS157DR RoHS compliant?
- How many independent circuits does the SN74LS157DR contain?
The SN74LS157DR contains 1 independent circuit.
