SN74HC257NSR
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Texas Instruments SN74HC257NSR

Manufacturer No:
SN74HC257NSR
Manufacturer:
Texas Instruments
Package:
Tape & Reel (TR)
Description:
IC MULTIPLEXER 4 X 2:1 16SO
Delivery:
Payment:
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Product Introduction

Overview

The SN74HC257NSR is a quad 2-line to 1-line data selector/multiplexer integrated circuit produced by Texas Instruments. This device is part of the HC (High-Speed CMOS) logic family and is designed to multiplex signals from 4-bit data sources to 4-output data lines in bus-organized systems. It operates over a wide voltage range of 2 V to 6 V, making it versatile for various applications.

Key Specifications

Parameter Unit Min Typ Max
Supply Voltage (VCC) V 2 5 6
High-Level Input Voltage (VIH) V 1.5 (VCC=2V), 3.15 (VCC=4.5V), 4.2 (VCC=6V)
Low-Level Input Voltage (VIL) V 0.3 (VCC=2V), 0.9 (VCC=4.5V), 1.2 (VCC=6V)
Operating Free-Air Temperature (TA) °C -40 85
Propagation Delay Time (tpd) ns 9 (VCC=6V) 17 (VCC=6V) 25 (VCC=6V)
Output Enable Time (ten) ns 13 (VCC=6V) 26 (VCC=6V) 38 (VCC=6V)
Output Disable Time (tdis) ns 13 (VCC=6V) 26 (VCC=6V) 38 (VCC=6V)
Input Transition Rise/Fall Time ns 400 (VCC=6V)
Storage Temperature Range (Tstg) °C -65 150

Key Features

  • Wide operating voltage range of 2 V to 6 V.
  • High-current inverting outputs drive up to 15 LSTTL loads.
  • Low power consumption, with a maximum ICC of 80 µA.
  • Typical propagation delay time of 9 ns at VCC = 6 V.
  • ±6-mA output drive at 5 V.
  • Low input current of 1 µA max.
  • Provides bus interface from multiple sources in high-performance systems.
  • 3-state outputs do not load the data lines when the output-enable (G) input is at a high logic level.

Applications

The SN74HC257NSR is suitable for a variety of applications, including:

  • Bus-organized systems where multiple data sources need to be multiplexed.
  • High-performance digital systems requiring low power consumption and fast switching times.
  • Embedded systems and microcontrollers where data needs to be selectively routed.
  • Industrial control systems and automation where reliable and efficient data handling is crucial.

Q & A

  1. What is the operating voltage range of the SN74HC257NSR?

    The operating voltage range is from 2 V to 6 V.

  2. What is the typical propagation delay time of the SN74HC257NSR at 6 V?

    The typical propagation delay time is 9 ns.

  3. How many LSTTL loads can the outputs of the SN74HC257NSR drive?

    The outputs can drive up to 15 LSTTL loads.

  4. What is the maximum input current of the SN74HC257NSR?

    The maximum input current is 1 µA.

  5. What is the purpose of the output-enable (G) input in the SN74HC257NSR?

    The output-enable (G) input controls the 3-state outputs, ensuring they do not load the data lines when at a high logic level.

  6. What is the storage temperature range for the SN74HC257NSR?

    The storage temperature range is from -65°C to 150°C.

  7. What are the package options available for the SN74HC257NSR?

    The SN74HC257NSR is available in SOP (NS) package.

  8. Is the SN74HC257NSR RoHS compliant?

    Yes, the SN74HC257NSR is RoHS compliant.

  9. What is the maximum operating free-air temperature for the SN74HC257NSR?

    The maximum operating free-air temperature is 85°C.

  10. How many data lines can the SN74HC257NSR multiplex from 4-bit data sources?

    The device can multiplex signals from 4-bit data sources to 4-output data lines.

Product Attributes

Type:Multiplexer
Circuit:4 x 2:1
Independent Circuits:1
Current - Output High, Low:7.8mA, 7.8mA
Voltage Supply Source:Single Supply
Voltage - Supply:2V ~ 6V
Operating Temperature:-40°C ~ 85°C
Mounting Type:Surface Mount
Package / Case:16-SOIC (0.209", 5.30mm Width)
Supplier Device Package:16-SO
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Similar Products

Part Number SN74HC257NSR SN74HC258NSR SN74HC157NSR SN74HC251NSR SN74HC253NSR SN74HC257ANSR
Manufacturer Texas Instruments Texas Instruments Texas Instruments Texas Instruments Texas Instruments Texas Instruments
Product Status Active Active Active Active Active Obsolete
Type Multiplexer Multiplexer Multiplexer Multiplexer Multiplexer Multiplexer
Circuit 4 x 2:1 4 x 2:1 4 x 2:1 1 x 8:1 2 x 4:1 4 x 2:1
Independent Circuits 1 1 1 1 1 1
Current - Output High, Low 7.8mA, 7.8mA 7.8mA, 7.8mA 7.8mA, 7.8mA 7.8mA, 7.8mA 7.8mA, 7.8mA 7.8mA, 7.8mA
Voltage Supply Source Single Supply Single Supply Single Supply Single Supply Single Supply Single Supply
Voltage - Supply 2V ~ 6V 2V ~ 6V 2V ~ 6V 2V ~ 6V 2V ~ 6V 2V ~ 6V
Operating Temperature -40°C ~ 85°C -40°C ~ 85°C -40°C ~ 85°C -40°C ~ 85°C -40°C ~ 85°C -40°C ~ 85°C
Mounting Type Surface Mount Surface Mount Surface Mount Surface Mount Surface Mount Surface Mount
Package / Case 16-SOIC (0.209", 5.30mm Width) 16-SOIC (0.209", 5.30mm Width) 16-SOIC (0.209", 5.30mm Width) 16-SOIC (0.209", 5.30mm Width) 16-SOIC (0.209", 5.30mm Width) 16-SOIC (0.209", 5.30mm Width)
Supplier Device Package 16-SO 16-SO 16-SO 16-SO 16-SO 16-SO

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