SN74CBT3383CDBRE4

Overview

The SN74CBT3383CDBRE4 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 a typical value of 3 Ω, enabling near-zero propagation delay. It includes active undershoot protection on the A and B ports up to −2 V. The IC is organized as a 10-bit bus switch or a 5-bit bus-exchange switch controlled by BE and BX inputs.

Feature Summary

• Bidirectional data flow with near-zero propagation delay
• Active undershoot protection for off-isolation on A and B ports
• Low ON-state resistance characteristics
• Supports partial-power-down mode operation via Ioff

Applications

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

Procurement Notes

Verify that the specific ordering suffix 'E4' corresponds to the required lead-free and RoHS-compliant configuration. Confirm the package type matches the design requirements, as this part number indicates an SSOP-24 variant. 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 data exchange between multiple signal ports. It is suitable for applications needing low loading and minimal signal distortion due to its low input/output capacitance. Verify compatibility with TTL or CMOS control logic levels before integration.

Part Context

This device belongs to the SN74CBT series of high-speed bus switches. It is designed for digital and analog applications where fast switching speeds and low power consumption are critical. The family provides various configurations for different bit widths and packaging options.

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 data path configuration for the bus-exchange switch.