SN74LVC138AQDRG4Q1

The SN74LVC138AQDRG4Q1 is a high-performance, low-voltage, 3-to-8 line decoder/demultiplexer from Texas Instruments. It is designed to operate with a supply voltage range of 1.65V to 5.5V, making it suitable for a variety of applications in both low-voltage and standard voltage systems.

Key Features:

1. Functionality: The device takes three binary inputs (A2, A1, A0) and decodes them into one of eight active low outputs (Y0 to Y7). When the inputs are not selected, all outputs are high (inactive).

2. Active Low Outputs: The outputs are active low, meaning that the selected output will be pulled low (to ground) while all other outputs remain high.

3. Enable Inputs: The SN74LVC138AQDRG4Q1 includes two enable inputs (G1, G2A, G2B) that allow for additional control over the device's operation. When the enable inputs are not activated, all outputs remain high regardless of the input states.

4. Speed: The device features fast propagation delays, typically around 4.5 ns at 3.3V, allowing for high-speed applications.

5. Low Power Consumption: It operates with low power consumption, making it ideal for battery-powered devices and energy-efficient designs.

6. Temperature Range: The device is rated for operation over a wide temperature range, typically from -40°C to +125°C, ensuring reliability in various environmental conditions.

7. Package Type: The SN74LVC138AQDRG4Q1 is available in a small, surface-mount package (TSSOP-16), which is suitable for space-constrained applications.

8. Logic Levels: It is compatible with both TTL and CMOS logic levels, providing versatility in interfacing with different types of digital circuits.

9. Applications: Common applications include data routing, memory address decoding, and signal demultiplexing in digital systems.

Electrical Characteristics:

• Supply Voltage (VCC): 1.65V to 5.5V
• Input Voltage Levels: Recognizes input high levels as low as 0.7VCC and input low levels as high as 0.3VCC.
• Output Drive Capability: Capable of driving standard CMOS loads, with a typical output current of ±24 mA.

Conclusion:

The SN74LVC138AQDRG4Q1 is a versatile and efficient decoder/demultiplexer that is well-suited for a wide range of digital applications. Its combination of low voltage operation, fast switching speeds, and low power consumption makes it an excellent choice for modern electronic designs.