Decoder

74LS42 Datasheet PDF – BCD/Decimal Decoder – National

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What is 74LS42?

This is a BCD to decimal decoder/driver integrated circuit that is commonly used in digital electronics. It is a Multipurpose Decoder designed to accept four BCD inputs and provide ten mutually exclusive outputs.

Function: BCD/Decimal Decoder

Package: DIP, SOP 16 Pin

Manufacturer: National Semicondcutor ( Texas Instruments )

Pinouts:
74LS42 datasheet

Description

These BCD-to-decimal decoders consist of eight inverters and ten, four-input NAND gates. The inverters are connected in pairs to make BCD input data available for decoding by the NAND gates. Full decoding of input logic ensures that all outputs remain off for all invalid (10± 15) input conditions.

Features

1. Diode clamped inputs

2. Also for applications as 4-line-to-16-line decoders; 3-line-to-8-line decoders

3. All outputs are high for invalid input conditions

Logic Diagram

components

Advantages

1. Can be used with a variety of display types, including LEDs and LCDs

2. Provides a straightforward method of decoding BCD inputs and displaying them on a 7-segment display

National Semiconductor was acquired by Texas Instruments (TI) on September 23, 2011.

Other data sheets are available within the file: 54LS42, 54LS42DMQB, 54LS42FMQB, DM54LS42

74LS42 Datasheet PDF

74LS42 pdf

74LS145 Datasheet PDF – 1-of-10 Decoder / Driver – Motorola

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What is 74LS145?

This is 1-of-10 Decoder/Driver, is designedto accept BCD inputsand provide appropriate outputs to drive 10-digit incandescent displays.All outputs remain off forall invalid binary input conditions.
Function: 1-of-10 decoder/driver open-collector

Package: DIP, SOIC 16 Pin Type

Manufacturer: Motorola,  Freescale – > NXP Semiconductors 

Image and Pinouts:

74LS145 datasheet

Description

It is designedfor use as indicator/relaydrivers or as an open-collector logic circuit driver.Each of the high breakdown output transistors will sink up to 80 mA of current. Typical power dissipation is 35 mW. This device is fully compatible with all TTL families.

Features

1. Low Power Version of 54/74145

2. Input Clamp Diodes Limit High Speed Termination Effects

FAQ

Q: What is the difference between a decoder and a demultiplexer?

A: A decoder is a digital circuit that converts coded inputs into coded outputs, while a demultiplexer is a digital circuit that takes a single input and selects one of several outputs based on the value of the input.

Q: What are some typical applications for the 74LS145?

A: This is commonly used in microprocessor systems to decode address or data bus lines. It can also be used in combination with other ICs to build complex logic circuits such as state machines or address decoders.

74LS145 Datasheet PDF Download

74LS145 pdf

 


Other data sheets are available within the file:

74145, SN54LS145J, SN74LS145D, SN74LS145N