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Product Detailed Parameters
- Description：IC MULTIPLEXER 4 X 2:1 16SOIC
- Series：74HCT
- Mfr：Texas Instruments
- Package：Tape & Reel (TR),Cut Tape (CT),Bulk
- Type：Multiplexer
- Circuit：4 x 2:1
- Independent Circuits：1
- Current - Output High, Low：6mA, 6mA
- Voltage Supply Source：Single Supply
- Voltage - Supply：4.5V ~ 5.5V
- Operating Temperature：-40°C ~ 85°C
- Mounting Type：Surface Mount
- Package / Case：16-SOIC (0.154", 3.90mm Width)
- Supplier Device Package：16-SOIC
- Grade：-
- Qualification：-
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Overview
The SN74HCT157DT is a quadruple 2-line to 1-line data selector/multiplexer manufactured by Texas Instruments in a 16-pin SOIC package. It operates within a supply voltage range of 4.5 V to 5.5 V and supports an operating temperature range from -40°C to 85°C. The device features buffered inputs and outputs, providing high-current drive capabilities up to 15 LSTTL loads with ±6-mA output drive at 5 V. Typical propagation delay is 15 ns, while maximum values reach 32 ns at 5.5 V with a 50 pF load. Input current is limited to 1 µA max, and typical power consumption is 80 µA.
Feature Summary
- TTL-voltage compatible inputs for direct interfacing with standard logic families
- High-current outputs capable of driving up to 15 LSTTL loads
- Includes a separate strobe (G) input for controlling data selection
Applications
- Data selection circuits routing 4-bit words from two sources
- Multiplexing applications requiring TTL-compatible interfaces
- Logic systems utilizing buffered signal paths
Procurement Notes
Verify the specific ordering suffix 'DT' against the latest TI Package Option Addendum, as it may indicate obsolete status or specific reel configurations. Confirm RoHS compliance and lead finish details directly with the manufacturer or authorized distributors before finalizing procurement plans.
Selection Notes
Select this component when a quadruple multiplexer with HCT logic compatibility is required. Ensure the application strictly adheres to the 4.5 V to 5.5 V supply voltage limits. Verify that the 16-pin SOIC package dimensions align with the target PCB layout constraints.
Part Context
This part belongs to the SNx4HCT157 family of quadruple 2-line to 1-line data selectors. It shares functional similarities with other multiplexers like the SN74HC157 but utilizes HCT technology for enhanced TTL compatibility. The device integrates inverters and drivers to supply full data selection to four output gates.
Replacement Considerations
SN74HCT157DR
FAQ
How does the strobe input function?
The separate strobe (G) input controls the data selection process, allowing the user to enable or disable the routing of the selected 4-bit word to the four outputs.
What is the maximum output drive capability?
The device provides high-current outputs capable of driving up to 15 LSTTL loads, with a specified output drive of ±6 mA at 5 V.
