SN74ABT240APWLE

Buffers, Drivers, Receivers, Transceivers Overview

The SN74ABT240APWLE is an octal buffer and line driver from the Texas Instruments ABT logic family, housed in a TSSOP-20 package. It features eight inverting outputs with three-state capability controlled by separate active-low output-enable inputs (1OE and 2OE). The device operates within a supply voltage range of 4.5 V to 5.5 V and supports an operating temperature range of -40°C to +85°C. Electrical characteristics include high-drive outputs capable of sourcing -32 mA and sinking 64 mA, with a typical propagation delay of 4.6 ns at 5 V. The design incorporates Ioff circuitry for partial-power-down mode support.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Provides high-drive current capabilities suitable for driving buses and memory address lines
• Supports partial-power-down mode via dedicated Ioff circuitry to prevent backflow currents
• Features symmetrical active-low output-enable inputs for flexible bus-oriented control

Buffers, Drivers, Receivers, Transceivers Applications

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

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify that the specific ordering suffix 'LE' corresponds to the standard SN74ABT240APWR or APW variants listed in the official datasheet. Confirm RoHS compliance status and lead finish specifications directly with the manufacturer, as suffixes often denote environmental or packaging variations not explicitly detailed in general product descriptions.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when designing systems requiring octal buffering with inverted logic and three-state isolation. Ensure the application utilizes a 5 V supply rail compatible with the ABT series. Verify that the TSSOP-20 package dimensions align with the PCB footprint requirements and that the thermal impedance characteristics are sufficient for the intended operating environment.

Buffers, Drivers, Receivers, Transceivers Part Context

This device belongs to the SN74ABT240A series of octal buffers and line drivers. It is functionally related to non-inverting counterparts such as the SN74ABT244A and complementary input variants like the SN74ABT241A. All devices in this family share similar electrical characteristics and pinout configurations, differing primarily in logic polarity and enable input arrangements.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74ABT240ADW

Buffers, Drivers, Receivers, Transceivers FAQ

How does the Ioff feature benefit system operation?

The Ioff circuitry disables the outputs when the device is powered down, preventing damaging current backflow through the device into the power supply.

What is the function of the OE inputs?

The active-low output-enable inputs (1OE and 2OE) control the state of the outputs. When low, data passes from inputs to outputs; when high, the outputs enter a high-impedance state.