74LVX138SJX

Product Overview

• Category: Integrated Circuit (IC)
• Use: Decoding and demultiplexing
• Characteristics: Low voltage, high-speed operation
• Package: SOP (Small Outline Package)
• Essence: 3-to-8 line decoder/demultiplexer
• Packaging/Quantity: Tape and reel, 2500 units per reel

Specifications

• Supply Voltage: 2.0V to 5.5V
• Input Voltage: -0.5V to VCC + 0.5V
• Output Voltage: -0.5V to VCC + 0.5V
• Operating Temperature: -40°C to +85°C
• Propagation Delay Time: 6 ns (typical)
• Output Current: ±24 mA

Detailed Pin Configuration

The 74LVX138SJX has a total of 16 pins, which are assigned as follows:

1. GND (Ground)
2. A0 (Address Input 0)
3. A1 (Address Input 1)
4. A2 (Address Input 2)
5. E1 (Enable Input 1)
6. Y0 (Output 0)
7. Y1 (Output 1)
8. Y2 (Output 2)
9. Y3 (Output 3)
10. Y4 (Output 4)
11. Y5 (Output 5)
12. Y6 (Output 6)
13. Y7 (Output 7)
14. E2 (Enable Input 2)
15. VCC (Positive Power Supply)
16. NC (No Connection)

Functional Features

• Decodes three binary address inputs into eight mutually exclusive outputs
• Demultiplexes one input into eight outputs based on the address inputs
• High-speed operation with low power consumption
• Compatible with both TTL and CMOS logic levels
• Schmitt-trigger action on all inputs for improved noise immunity

Advantages and Disadvantages

Advantages

• Wide operating voltage range allows flexibility in various applications
• Fast propagation delay time enables high-speed data processing
• Low power consumption makes it suitable for battery-powered devices
• Compatibility with different logic levels simplifies integration into existing systems
• Schmitt-trigger action enhances noise immunity, ensuring reliable operation

Disadvantages

• Limited number of address inputs (3) may restrict certain complex applications
• Output current limitations may not be sufficient for driving heavy loads

Working Principles

The 74LVX138SJX is a 3-to-8 line decoder/demultiplexer IC. It takes three binary address inputs (A0, A1, and A2) and decodes them into eight mutually exclusive outputs (Y0 to Y7). The enable inputs (E1 and E2) control the operation of the decoder and demultiplexer functions.

When the enable input E1 is active (low), the decoder function is enabled, and the selected output line corresponds to the binary value of the address inputs. Conversely, when E2 is active (low), the demultiplexer function is enabled, and the input signal is routed to the corresponding output line based on the address inputs.

The IC operates at a wide supply voltage range of 2.0V to 5.5V, making it compatible with various digital systems. Its fast propagation delay time of 6 ns ensures efficient data processing. The Schmitt-trigger action on all inputs enhances noise immunity, allowing reliable operation even in noisy environments.

Detailed Application Field Plans

The 74LVX138SJX finds applications in various fields, including:

1. Address decoding in microcontrollers and microprocessors
2. Memory selection and control in digital systems
3. Data routing and distribution in communication systems
4. Signal demultiplexing in data acquisition systems
5. Control signal generation in industrial automation

Detailed and Complete Alternative Models

1. 74HC138: Similar 3-to-8 line decoder/demultiplexer IC with TTL logic levels
2. CD74HCT138: High-speed CMOS version of the 3-to-8 line decoder/demultiplexer
3. SN74LS138: Low-power Schottky version of the 3-to-8 line decoder/demultiplexer

These alternative models offer similar functionality to the 74LVX138SJX but may have different characteristics, package options, or voltage requirements.

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