74HC138DR2G

Signal Switches, Multiplexers, Decoders Overview

The onsemi 74HC138DR2G is a high-performance silicon-gate CMOS 1-of-8 decoder/demultiplexer. It decodes three-bit address inputs (A0, A1, A2) to one of eight active-low outputs (Y0-Y7). The device features three chip select inputs: CS1 (active-high), and CS2, CS3 (active-low). It operates within a supply voltage range of 2.0 V to 6.0 V and supports an operating temperature from -55°C to +125°C. Packaged in SOIC-16, it provides output drive capability for 10 LSTTL loads.

Signal Switches, Multiplexers, Decoders Feature Summary

• Decodes three-bit binary addresses to activate one of eight active-low outputs
• Includes three chip select inputs to facilitate demultiplexing and cascading functions
• Outputs directly interface with CMOS, NMOS, and TTL logic families
• Compatible with standard CMOS outputs and LSTTL outputs when pullup resistors are used

Signal Switches, Multiplexers, Decoders Applications

• Demultiplexing data streams using address inputs and chip selects
• Cascading multiple decoder units for expanded address decoding
• Implementing chip-select functions in memory or peripheral systems

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the package suffix 'D' corresponds to the SOIC-16 form factor as specified in the ordering information. Confirm the component is lead-free (Pb-Free) by checking the marking diagram for the 'G' suffix. Ensure the datasheet revision matches the required specifications for your design constraints.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when a single 1-of-8 decoder with wide voltage operation is required. The HC series offers compatibility with standard CMOS outputs. Consider the TSSOP-16 variant if a smaller footprint is needed, though the DR2G specifically denotes the SOIC-16 package.

Signal Switches, Multiplexers, Decoders Part Context

This part belongs to the 74HC138 family of high-speed CMOS logic devices manufactured by onsemi. It shares pinout compatibility with LS138 devices but utilizes CMOS technology for lower input current and higher noise immunity. The device is designed for general-purpose digital decoding applications requiring robust performance across varying temperatures.

Signal Switches, Multiplexers, Decoders Replacement Considerations

The 74HC138DTR2G is a direct replacement offering the same functionality in a TSSOP-16 package instead of SOIC-16.