SN74LVC245APWE4

Buffers, Drivers, Receivers, Transceivers Overview

The SN74LVC245APWE4 is an octal bus transceiver with three-state outputs manufactured by Texas Instruments. It operates from a supply voltage of 1.65 V to 3.6 V and features inputs that accept voltages up to 5.5 V, enabling mixed-mode signal operation. The device supports asynchronous communication between data buses with a maximum propagation delay of 6.3 ns at 3.3 V. It includes Ioff circuitry for partial-power-down mode and back drive protection. The component is housed in a 20-pin TSSOP package.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Supports bidirectional data transmission between two 8-bit buses controlled by a direction pin.
• Provides high-drive CMOS output capability suitable for PCB trace length extensions.
• Features input overvoltage tolerance allowing compatibility with 5-V devices while operating at lower supply voltages.

Buffers, Drivers, Receivers, Transceivers Applications

• Cable modem termination systems
• Servers
• LED displays
• Network switches
• I/O expanders

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix 'E4' corresponds to the required lead-free and RoHS-compliant configuration as defined in the manufacturer's orderable addendum. Confirm the package type matches the design requirements, as this part number indicates the TSSOP variant. Ensure the procurement source provides valid documentation regarding moisture sensitivity levels and reflow temperature profiles for assembly planning.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when designing systems requiring translation between 5-V logic inputs and 1.65-V to 3.6-V logic supplies. It is appropriate for applications needing high-speed data transfer with low power consumption. Consider the thermal resistance characteristics if operating near the upper temperature limits or under heavy load conditions.

Buffers, Drivers, Receivers, Transceivers Part Context

This device belongs to the SN74LVC245A family of octal bus transceivers. It is designed for general-purpose asynchronous communication on data buses. The 'E4' suffix typically denotes environmental compliance, specifically lead-free packaging and adherence to RoHS standards within the Texas Instruments product line.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74LVC245APW

Buffers, Drivers, Receivers, Transceivers FAQ

How does the OE pin function?

The Output Enable (OE) pin disables the device when high, effectively isolating the buses. When low, it allows data transmission based on the DIR pin state.

What is the purpose of the Ioff circuitry?

The Ioff circuitry prevents damaging current backflow through the device when it is powered down, supporting partial-power-down applications.