74LVT240SJX

Overview

The onsemi 74LVT240SJX is a low-voltage octal buffer and line driver featuring inverting logic with three-state outputs. It operates within a supply voltage range of 2.7V to 3.6V and supports input voltages up to 5.5V, enabling interface compatibility with 5V systems. The device utilizes advanced BiCMOS technology for high-speed operation while maintaining low power dissipation. It provides an output current capability of -32mA (source) and +64mA (sink). Propagation delays are specified at 1.1ns minimum and 4.6ns maximum at 2.7V, and 1.1ns minimum and 4.0ns maximum at 3.3V.

Feature Summary

• Provides bus-hold functionality on data inputs to eliminate the need for external pull-up resistors for unused inputs.
• Supports live insertion and extraction without causing glitches due to power-up/down high-impedance states.
• Offers improved PC board density through octal configuration designed for memory address and clock drivers.

Applications

• Memory address drivers
• Clock drivers
• Bus-oriented transmitters or receivers

Procurement Notes

Verify the specific package variant against the datasheet ordering information, as the SJX suffix corresponds to the 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide. Confirm that the required bushold feature is present, as this applies to the LVTH240 variant; ensure the base part number matches the functional requirement. Check RoHS compliance status via manufacturer declarations.

Selection Notes

Select this component when interfacing 3.3V logic with 5V environments requiring TTL compatibility. The device is suitable for applications needing high drive strength with low power consumption. Ensure the design accounts for the inverting nature of the buffer. Verify thermal performance within the recommended operating temperature range of -40°C to +85°C.

Part Context

This component belongs to the LVT/LVTH series of low-voltage logic devices originally manufactured by Fairchild Semiconductor. The series is designed to provide high-speed performance similar to 5V ABT families while operating at lower voltages. The 74LVT240 specifically addresses the need for octal buffering in dense digital systems.

Replacement Considerations

Public confirmed substitute part numbers: 74LVTH240SJX.

FAQ

Does the 74LVT240SJX include bus-hold inputs?

No, the standard 74LVT240 does not include bus-hold inputs. This feature is available only in the 74LVTH240 variant.

What is the maximum input voltage supported by the 74LVT240SJX?

The device supports DC input voltages up to 5.5V, allowing it to interface directly with 5V systems despite its 2.7V to 3.6V supply range.