ET74HC138V

Overview

The ET74HC138V is a high-speed CMOS decoder circuit manufactured by ETEK Microelectronics. It accepts three-bit binary weighted address inputs on pins A0, A1, and A2 to produce one low-active output and seven high-active outputs when enabled. The device features two low-active enable inputs (E1, E2) and one high-active enable input (E3). It operates within a voltage range of 2.0V to 6.0V and supports an operating temperature range of -40°C to +85°C. The component is housed in a TSSOP-16 package.

Feature Summary

• High-speed CMOS technology for efficient decoding
• Three-bit binary weighted address input capability
• Composite enable inputs allowing easy parallel expansion
• Low-active mutually exclusive outputs

Applications

• Memory chip select decoding
• Data routing applications
• Parallel expansion into larger decoders

Procurement Notes

Verify the specific suffix 'V' corresponds to the TSSOP-16 package configuration as documented in official ETEK Microelectronics datasheets. Confirm that the ordering information matches the exact part number ET74HC138V to ensure correct pinout and electrical characteristics. Cross-reference with authorized distributors to validate current availability and compliance status.

Selection Notes

Select this component for designs requiring high-speed memory decoding or data transmission systems. Ensure the supply voltage remains within the 2.0V to 6.0V range. Consider the TSSOP-16 package constraints for PCB layout. Verify compatibility with system logic levels and temperature requirements before integration.

Part Context

This part belongs to the 74HC series of high-speed CMOS logic devices. It is functionally consistent with other industry-standard 3-to-8 line decoders but is specifically manufactured by ETEK Microelectronics. The 'V' suffix typically denotes the TSSOP-16 surface-mount package variant within their product lineup.

Replacement Considerations

The MM74HC138 from ON Semiconductor is a compatible alternative offering similar functionality and pinout. Other generic 74HC138 variants from manufacturers like Diodes Incorporated may serve as substitutes if electrical specifications and package dimensions align with the design requirements.