SN74LVTH240DWR

Buffers, Drivers, Receivers, Transceivers Overview

The SN74LVTH240DWR is a 3.3-V ABT octal buffer and line driver with 3-state outputs, manufactured by Texas Instruments in a 20-pin SOIC (DW) package. It operates within a supply voltage range of 2.7 V to 3.6 V and supports an input voltage up to 5.5 V, enabling mixed-mode signal operation between 3.3-V and 5-V systems. The device features two independent 4-bit buffers with separate output-enable inputs. Electrical characteristics include a high-level output current of -32 mA and a low-level output current of 64 mA at VCC = 3.3 V. Typical propagation delay is 2.2 ns for tPLH and 2.6 ns for tPHL at VCC = 3.3 V. It operates over a temperature range of -40°C to +85°C.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Supports mixed-mode signal operation allowing 5-V input tolerance with 3.3-V VCC operation
• Includes active bus-hold circuitry on data inputs to maintain valid logic states without external resistors
• Provides Ioff and power-up 3-state support to prevent damaging backflow currents during hot insertion
• Features latch-up performance exceeding 500 mA per JESD 17 standards

Buffers, Drivers, Receivers, Transceivers Applications

• Memory mapping applications requiring level translation
• Clock drivers and buffering in mixed-voltage systems
• Bus-oriented communications interfaces
• High-density memory drives

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the ordering suffix 'DWR' corresponds to the SOIC-20 tape and reel packaging configuration. Confirm that the specific revision of the datasheet SCBS679K matches the production lot requirements. Ensure the procurement specification aligns with the catalog status for SN74LVTH240DWR rather than military or other qualified versions. Check RoHS compliance status as indicated in the package addendum.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when designing circuits that require driving 8 bits of data across a bus with 3-state control. It is suitable for systems needing interface between 3.3-V logic cores and 5-V peripheral devices. Consider the -40°C to +85°C operating range for industrial or commercial environments. Evaluate the 32 mA/64 mA drive strength against load capacitance requirements to ensure signal integrity.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the SN54LVTH240/SN74LVTH240 family of 3.3-V ABT octal buffers/drivers. The 'SN74' prefix indicates commercial grade availability, while 'LVTH' denotes Low Voltage TTL-compatible High-speed technology. The 'DWR' suffix specifies the SOIC package type with tape and reel shipping. It is a standard catalog product distinct from the SN54 series which covers military specifications.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

Public confirmed substitute part numbers are not explicitly listed in the provided source material for direct pin-to-pin replacement verification.