SN74ALVCH245DWR

Buffers, Drivers, Receivers, Transceivers Overview

The SN74ALVCH245DWR is an octal bus transceiver with 3-state outputs manufactured by Texas Instruments. It operates from a supply voltage range of 1.65 V to 3.6 V and features a maximum propagation delay of 3.4 ns at 3.3 V. The device provides ±24-mA output drive capability at 3.3 V and includes bus hold circuitry on data inputs to eliminate the need for external pullup or pulldown resistors. Latch-up performance exceeds 100 mA per JESD 78, Class II. It is housed in a 20-pin SOIC (DW) package and supports an operating free-air temperature range of -40°C to +85°C.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Supports asynchronous communication between data buses with direction control via DIR input
• Includes active bus-hold circuitry to maintain valid logic states on unused or undriven inputs
• Provides high-impedance isolation when output-enable (OE) input is disabled

Buffers, Drivers, Receivers, Transceivers Applications

• Asynchronous communication between data buses
• Memory and memory mapping applications
• Clock drivers and buffered oscillators

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify that the component matches the SN74ALVCH245DWR part number and SOIC-20 package configuration. Confirm the manufacturer is Texas Instruments and check for RoHS compliance status. Ensure the operating temperature range meets the application requirements of -40°C to +85°C. Validate that the supply voltage specifications align with the system design constraints.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component for designs requiring low-voltage operation between 1.65 V and 3.6 V. Consider the 3.4 ns propagation delay for timing-sensitive applications. The ±24-mA drive strength is suitable for moderate load conditions. Verify compatibility with existing logic families and ensure proper handling of the OE and DIR control signals for bidirectional data flow.

Buffers, Drivers, Receivers, Transceivers Part Context

This device belongs to the ALVCH family of low-voltage CMOS logic products. It serves as an octal bus transceiver variant within the broader 74-series logic ecosystem. The DW suffix indicates the SOIC package type, distinguishing it from other packaging options like TSSOP or TVSOP available in the same logical family.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

Check for SN74ALVCH245DW (tube version) if tape-and-reel packaging is not required. Other variants such as SN74ALVCH245PWR or SN74ALVCH245DGVR offer different package types but share similar electrical characteristics.

Buffers, Drivers, Receivers, Transceivers FAQ

What is the function of the bus-hold circuitry?

The bus-hold circuitry holds unused or undriven inputs at a valid logic state, eliminating the need for external pullup or pulldown resistors.

How does the device handle power-up and power-down states?

To ensure a high-impedance state during power-up or power-down, the OE input should be tied to VCC through a pullup resistor.