SN74CBTR16861DLR

Overview

The SN74CBTR16861DLR is a 20-bit FET bus switch from the Widebus family, organized as two independent 10-bit switches. It operates on a single supply voltage ranging from 4 V to 5.5 V and features TTL-compatible input levels. The device includes separate output-enable inputs for each 10-bit section. It incorporates equivalent 25-Ω series resistors to reduce signal-reflection noise, eliminating the need for external terminating resistors.

Feature Summary

• Provides high-speed bus switching with low on-state resistance for minimal propagation delay.
• Features integrated equivalent 25-Ω series resistors to reduce signal-reflection noise without requiring external components.
• Offers latch-up performance exceeding 100 mA per JESD 78, Class II standards.

Applications

• High-speed data routing in digital systems
• Bus bridging applications requiring low insertion loss
• Signal path selection in multi-port architectures

Procurement Notes

Verify the specific package variant (SSOP DL) against design requirements. Confirm that the operating temperature range of -40°C to 85°C aligns with system environmental constraints. Ensure all unused control inputs are tied to VCC or GND to maintain proper device operation and prevent undefined states.

Selection Notes

Select this component when a 20-bit wide bus switch is required with TTL-compatible logic levels. The SSOP-48 package suits designs needing surface-mount integration. Consider the 25-Ω internal resistance for impedance matching needs. Verify power supply stability within the 4 V to 5.5 V range for optimal switching performance.

Part Context

This device belongs to Texas Instruments' Widebus family, designed for high-density bus switching applications. It utilizes FET technology to achieve low on-resistance and fast switching speeds. The SN74CBTR16861DLR is part of a broader lineup offering various pin counts and packaging options for different board space and channel requirements.

Replacement Considerations

SN74CBTR16861DGGR: TSSOP-48 package alternative. SN74CBTR16861DGVR: TVSOP-48 package alternative. SN74CBTR16861DL: SSOP-48 tube package alternative.

FAQ

How does the device handle signal reflection?

The SN74CBTR16861DLR includes equivalent 25-Ω series resistors internally to reduce signal-reflection noise, which eliminates the need for external terminating resistors.

What is the organization of the 20-bit switch?

The device is organized as one dual 10-bit switch with separate output-enable (OE) inputs for each 10-bit section.