Overview
The SN74HC138N3 is a 3-line to 8-line decoder/demultiplexer produced by Texas Instruments. This device is specifically designed for high-performance memory-decoding and data-routing applications that require very short propagation delay times. It is particularly useful in high-speed memory systems where it can minimize the effects of system decoding, especially when used with fast enable circuits and high-speed memories.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Voltage Supply Range | 2 V to 6 V | V |
| Operating Temperature Range | -40°C to 85°C | °C |
| Output Drive Capability | ±4 mA at 5 V, ±5.2 mA at 6 V | mA |
| Maximum Input Current | 1 µA | µA |
| Maximum Power Consumption (ICC) | 80 µA | µA |
| Propagation Delay Time (tpd) | Typical 15 ns | ns |
| Package Type | 16-PDIP (0.300" | 7.62mm) | |
| Mounting Type | Through Hole |
Key Features
- Targeted specifically for high-speed memory decoders and data-transmission systems.
- Wide operating voltage range (2 V to 6 V).
- Outputs can drive up to 10 LSTTL loads.
- Low power consumption, with a maximum ICC of 80 µA.
- Typical propagation delay time of 15 ns.
- ±4-mA output drive at 5 V and ±5.2-mA output drive at 6 V.
- Low input current of 1-µA maximum.
- Active low outputs (selected output is low).
- Incorporates three enable inputs to simplify cascading or data reception.
Applications
- LED displays.
- Servers.
- White goods.
- Power infrastructure.
- Building automation.
- Factory automation.
Q & A
- What is the primary function of the SN74HC138N3?
The SN74HC138N3 is a 3-line to 8-line decoder/demultiplexer designed for high-performance memory-decoding and data-routing applications.
- What is the operating voltage range of the SN74HC138N3?
The operating voltage range is from 2 V to 6 V.
- What is the typical propagation delay time of the SN74HC138N3?
The typical propagation delay time is 15 ns.
- How many LSTTL loads can the outputs of the SN74HC138N3 drive?
The outputs can drive up to 10 LSTTL loads.
- What is the maximum power consumption of the SN74HC138N3?
The maximum power consumption (ICC) is 80 µA.
- What type of outputs does the SN74HC138N3 have?
The SN74HC138N3 has active low outputs.
- How many enable inputs does the SN74HC138N3 have?
The device incorporates three enable inputs.
- What is the package type of the SN74HC138N3?
The package type is 16-PDIP (0.300" | 7.62mm).
- What is the operating temperature range of the SN74HC138N3?
The operating temperature range is from -40°C to 85°C.
- In what types of applications is the SN74HC138N3 commonly used?
It is commonly used in LED displays, servers, white goods, power infrastructure, building automation, and factory automation.
