SN74CBT3383CDBR

Overview

The SN74CBT3383CDBR is a high-speed TTL-compatible FET bus-exchange switch manufactured by Texas Instruments. It operates within a supply voltage range of 4 V to 5.5 V and supports data I/O levels from 0 V to 5 V. The device features low ON-state resistance (ron) with typical values of 3 Ω at 4.5 V and 12 Ω at 4 V, ensuring minimal propagation delay. It includes active undershoot protection on A and B ports up to -2 V. The package is SSOP-24.

Feature Summary

• Bidirectional data flow with near-zero propagation delay
• Active undershoot-protection circuitry for off-isolation
• Low input/output capacitance minimizes loading and signal distortion
• Supports partial-power-down mode operation using Ioff

Applications

• PCI interface
• Memory interleaving
• Bus isolation
• Low-distortion signal gating

Procurement Notes

Verify the exact ordering suffix matches the required package type. Confirm RoHS compliance status and moisture sensitivity level ratings before procurement. Ensure control inputs are tied to VCC or GND during operation to maintain proper device functionality.

Selection Notes

Select this component when designing systems requiring bidirectional bus exchange with minimal signal degradation. Verify that the operating temperature range meets environmental requirements. Check that the control input voltage levels align with the driving logic family specifications.

Part Context

This part belongs to the SN74CBT3383C series of high-speed FET bus-exchange switches. It is designed for applications demanding fast switching speeds and low power consumption. The device integrates five independent 2:2 bus-exchange switches controlled by BE and BX inputs.

Replacement Considerations

SN74CBT3383CDWR

FAQ

How does the device handle partial-power-down scenarios?

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

What is the function of the BE and BX inputs?

The BE input controls the output-enable state, while the BX input determines the specific data path configuration between the A and B ports.