SN74HC251D
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Texas Instruments SN74HC251D

Manufacturer No:
SN74HC251D
Manufacturer:
Texas Instruments
Package:
Bulk
Description:
IC MULTIPLEXER 1 X 8:1 16SOIC
Delivery:
Payment:
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Product Introduction

Overview

The SN74HC251D is a data selector/multiplexer produced by Texas Instruments. This device is part of the 74HC series, known for its high-speed and low-power CMOS logic. The SN74HC251D features full binary decoding to select one of eight data sources and includes strobe-controlled complementary 3-state outputs. This component is designed to interface directly with system buses or drive up to 15 LSTTL loads, making it versatile for various digital circuit applications.

Key Specifications

Parameter Min Typ Max Unit
VCC Supply Voltage 2 5 6 V
VIH High-Level Input Voltage 1.5 (VCC = 2V) - 3.15 (VCC = 4.5V) V
VOH High-Level Output Voltage 1.9 (VCC = 2V, IOH = -20μA) - 5.9 (VCC = 6V, IOH = -20μA) V
VOL Low-Level Output Voltage 0.1 (VCC = 2V, IOL = 20μA) - 0.4 (VCC = 6V, IOL = 7.8mA) V
ICC Quiescent Current - 8 80 μA
tpd Propagation Delay 58 (VCC = 2V, CL = 50pF) - 205 (VCC = 2V, CL = 50pF) ns
TJ Junction Temperature - - 150 °C
Tstg Storage Temperature -65 - 150 °C

Key Features

  • 3-state version of the 'HC151, with strobe-controlled complementary 3-state outputs.
  • Wide operating voltage range of 2 V to 6 V.
  • High-current 3-state outputs that can interface directly with system buses or drive up to 15 LSTTL loads.
  • Low power consumption, with a maximum ICC of 80 μA.
  • Typical propagation delay of 9 ns.
  • ±6-mA output drive at 5 V.
  • Low input current of 1 μA max.
  • Ability to perform parallel-to-serial conversion.
  • Complementary outputs provide true and inverted data.

Applications

  • Bus-organized systems where multiple data sources need to be selected and routed.
  • Digital multiplexing and demultiplexing applications.
  • Parallel-to-serial conversion circuits.
  • General-purpose logic circuits requiring high-speed and low-power operation.
  • Embedded systems and microcontroller interfaces.

Q & A

  1. What is the operating voltage range of the SN74HC251D?

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

  2. What is the maximum propagation delay of the SN74HC251D?

    The maximum propagation delay is approximately 205 ns at VCC = 2 V and CL = 50 pF.

  3. How many LSTTL loads can the SN74HC251D drive?

    The device can drive up to 15 LSTTL loads.

  4. What is the typical quiescent current of the SN74HC251D?

    The typical quiescent current is 8 μA.

  5. What is the junction temperature range for the SN74HC251D?

    The junction temperature range is up to 150°C.

  6. Can the SN74HC251D perform parallel-to-serial conversion?

    Yes, the device can perform parallel-to-serial conversion.

  7. What type of outputs does the SN74HC251D have?

    The device has strobe-controlled complementary 3-state outputs.

  8. What is the recommended bypass capacitor for the power supply?

    A 0.1-μF capacitor is recommended, and it is acceptable to parallel multiple bypass caps to reject different frequencies of noise.

  9. What are the package options available for the SN74HC251D?

    The device is available in various packages including SOIC, SSOP, PDIP, SO, TSSOP, and LCCC.

  10. What is the storage temperature range for the SN74HC251D?

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

Product Attributes

Type:Multiplexer
Circuit:1 x 8:1
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 (0.154", 3.90mm Width)
Supplier Device Package:16-SOIC
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Similar Products

Part Number SN74HC251D SN74HC257D SN74HC258D SN74HC251DT SN74HC251N SN74HC253D SN74HC251DR SN74HC151D
Manufacturer Texas Instruments Texas Instruments Texas Instruments Texas Instruments Texas Instruments Texas Instruments Texas Instruments Texas Instruments
Product Status Active Active Active Active Active Active Active Active
Type Multiplexer Multiplexer Multiplexer Multiplexer Multiplexer Multiplexer Multiplexer Multiplexer
Circuit 1 x 8:1 4 x 2:1 4 x 2:1 1 x 8:1 1 x 8:1 2 x 4:1 1 x 8:1 1 x 8:1
Independent Circuits 1 1 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 7.8mA, 7.8mA 7.8mA, 7.8mA
Voltage Supply Source Single Supply Single Supply 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 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 -40°C ~ 85°C -40°C ~ 85°C
Mounting Type Surface Mount Surface Mount Surface Mount Surface Mount Through Hole Surface Mount Surface Mount Surface Mount
Package / Case 16-SOIC (0.154", 3.90mm Width) 16-SOIC (0.154", 3.90mm Width) 16-SOIC (0.154", 3.90mm Width) 16-SOIC (0.154", 3.90mm Width) 16-DIP (0.300", 7.62mm) 16-SOIC (0.154", 3.90mm Width) 16-SOIC (0.154", 3.90mm Width) 16-SOIC (0.154", 3.90mm Width)
Supplier Device Package 16-SOIC 16-SOIC 16-SOIC 16-SOIC 16-PDIP 16-SOIC 16-SOIC 16-SOIC

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