74LS248-BCD TO 7-Segment Decoder/Driver

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The 74LS series of integrated circuits (ICs) was one of the most popular logic families of transistor-transistor logic (TTL) logic chips. 74LS series is a bipolar, low-power Schottky IC.The 74LS248 is a BCD-to-Seven-Segment Decoder/Drivers. The 74LS248 composes 6 and 9 with the tails and active for low outputs for direct drive of indicators.

74LS248 Features

  • Internal Pull-Ups Eliminate Need for External Resistors
  • Lamp-Test Provision
  • Leading /Trailing Zero Suppression

74LS248 Specifications

Supply Voltage4.75 – 5.25Vdc
Maximum Clock Frequency40Mhz
Power Dissipation2mW/gate @100kHz
Minimum Output Current8mA
Propagation Delay10nS
Fan Out (TTL Loads)20

74LS248 Pinout Diagram

74LS248 Pin Description

Pin NoPin NameDescription
1BInput Pin
2CInput Pin
3LT’Lamp test Pin
4RBO’Ripple Blanking Output(Active Low)
5RBI’Ripple Blanking Input(Active Low)
6DInput Pin
7AInput Pin
8GNDGround
9eOutput
10dOutput
11cOutput
12bOutput
13aOutput
14gOutput
15fOutput
16VCCPositive Supply

Applications

  • Decoders are used to input data to a specified output line as is done in addressing core memory where input data is to be stored in a specified memory location.
  • It is used in code conversions.
  • In high-performance memory systems, this decoder can be used to minimize the effects of system decoding.

74LS248 Alternative Equivalent

74LS247

Download 74LS248-BCD TO 7-Segment Decoder/Driver Datasheet from the link given below.