SN74CBTLV3245ADWE4

Overview

The SN74CBTLV3245ADWE4 is a low-voltage octal FET bus switch manufactured by Texas Instruments. It provides 8 bits of high-speed bidirectional bus switching in a standard '245-type pinout within a 20-pin SOIC package. The device operates with a supply voltage range of 2.3 V to 3.6 V and supports an operating temperature range from -40°C to 85°C. Key electrical characteristics include a typical on-state resistance (ron) of 5 Ω at VCC = 3 V, propagation delay (tpd) of 0.15 ns to 0.25 ns at VCC = 3.3 V, and Ioff support for partial-power-down applications.

Feature Summary

• Features rail-to-rail switching capability on data I/O ports for full signal integrity.
• Supports partial-power-down mode operation via the Ioff feature to prevent backflow current.
• Provides isolation between ports when the output enable (OE) signal is high.

Applications

• Datacenter and enterprise computing
• Broadband fixed line access
• Wired networking

Procurement Notes

Verify that the specific ordering suffix corresponds to the DW (SOIC) package variant as indicated in the part number. Confirm RoHS compliance status and lead-free manufacturing attributes during procurement. Ensure the component meets the required JESD standards for latch-up performance and electrostatic discharge protection before integration into final designs.

Selection Notes

Select this component when a standard '245-compatible footprint is required for low-voltage systems. The device is suitable for applications needing minimal propagation delay and low on-state resistance. Consider the 20-pin SOIC package dimensions for PCB layout constraints. Verify that the operating voltage range aligns with the system's power supply specifications.

Part Context

This device belongs to the SN74CBTLV3245A family of low-voltage octal FET bus switches. The family offers high-speed switching capabilities designed for modern digital interfaces. The ADWE4 designation specifies the particular package type and environmental compliance level within the broader product lineup offered by Texas Instruments.

Replacement Considerations

Check for other variants within the SN74CBTLV3245A family that may offer different package options such as SSOP or TSSOP if space constraints differ. Ensure any substitute maintains the same '245-type pinout compatibility and electrical specifications for direct replacement.

FAQ

How does the Ioff feature function?

The Ioff feature ensures that damaging current does not backflow through the device when it is powered down, maintaining isolation during power-off states.

What is the control logic for the switch?

When the Output Enable (OE) pin is low, the 8-bit bus switch connects Port A to Port B. When OE is high, the switch opens, creating a high-impedance state between the ports.