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Product Detailed Parameters
- Description：IC DECODER/DEMUX 1X3:8 16DIP
- Series：74HC
- Mfr：Texas Instruments
- Package：Tube
- Type：Decoder/Demultiplexer
- Circuit：1 x 3:8
- Independent Circuits：1
- Current - Output High, Low：5.2mA, 5.2mA
- Voltage Supply Source：Single Supply
- Voltage - Supply：2V ~ 6V
- Operating Temperature：-40°C ~ 85°C
- Mounting Type：Through Hole
- Package / Case：16-DIP (0.300", 7.62mm)
- Supplier Device Package：16-PDIP
- Grade：-
- Qualification：-
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Overview
The SN74HC138NG4 is a single 3-to-8 line decoder and demultiplexer manufactured by Texas Instruments. It operates within a supply voltage range of 2 V to 6 V and features three binary select inputs (A, B, C) and three enable inputs (G1, G2A, G2B). The device provides eight active-low outputs (Y0 through Y7), where only the selected output is pulled low while others remain high. It utilizes CMOS technology for low power consumption and offers an operating temperature range from -40°C to +85°C.
Feature Summary
- Incorporates three enable inputs to simplify cascading or data reception applications
- Designed for high-speed memory decoding and data-routing systems requiring short propagation delays
- Outputs can drive up to ten LSTTL loads
Applications
- LED Displays
- Servers
- White Goods
- Power Infrastructure
- Building Automation
Procurement Notes
Verify the specific package type and lead finish against the current TI Package Option Addendum before ordering. Confirm that the 'G4' suffix aligns with the required environmental compliance standards for your project. Check the official product status to ensure availability, as manufacturing statuses may change without notice.
Selection Notes
Select this component when a standard 3-to-8 decoding function is required in commercial-grade environments. Ensure the system voltage falls between 2 V and 6 V. Consider the PDIP-16 package for through-hole mounting requirements. Verify that the propagation delay characteristics meet the timing constraints of the target application.
Part Context
This part belongs to the SNx4HC138 family of high-speed CMOS logic devices. It serves as a fundamental building block for address decoding and signal routing in digital circuits. The device is designed to minimize system decoding effects in high-performance memory systems, ensuring negligible effective system delay when used with fast-enable memories.
Replacement Considerations
SN74HC138N
FAQ
How are the enable inputs configured?
The device has one active-high enable input (G1) and two active-low enable inputs (G2A, G2B). All three must be active for the outputs to be enabled.
What is the state of unselected outputs?
When the device is enabled, the selected output is pulled LOW, while all remaining unselected outputs remain HIGH.
