SN74CBT3251DBQR

Overview

The SN74CBT3251DBQR is a low-voltage 1-of-8 FET multiplexer/demultiplexer manufactured by Texas Instruments. It operates within a supply voltage range of 4 V to 5.5 V and features an SSOP-16 package. Key electrical parameters include a maximum on-resistance of 7 Ohms, a bandwidth of 200 MHz, and propagation delays with a maximum turn-on time of 6.4 ns and turn-off time of 6.8 ns. The device supports a single channel configuration (1 x 8:1) and functions across an operating temperature range of -40°C to +85°C.

Feature Summary

• Provides high-speed signal routing via a single-channel 1-of-8 multiplexing architecture
• Utilizes FET technology for low on-resistance and minimal signal distortion
• Supports standard 5 V logic systems with wide operating voltage tolerance

Applications

• Portable equipment requiring low-power signal switching
• Battery-powered systems utilizing 5 V logic interfaces
• High-speed data routing in consumer electronics

Procurement Notes

Verify the specific package variant matches the design requirement, as the SN74CBT3251 series includes multiple form factors such as RGYR and D. Confirm that the 4 V to 5.5 V supply voltage range aligns with the target system power rails. Ensure compatibility with the -40°C to +85°C industrial temperature range for the intended application environment before finalizing component selection.

Selection Notes

Select this component when a single 8-to-1 multiplexer is required for 5 V logic applications. The SSOP-16 package offers a compact surface-mount solution suitable for space-constrained designs. Consider the 200 MHz bandwidth and sub-7 ns delay characteristics for high-speed signal integrity requirements compared to slower CMOS alternatives.

Part Context

This part belongs to the SN74CBT3251 family of low-voltage analog switches. It serves as a digital multiplexer alternative to mechanical relays or older transistor-based switches. The device is designed for applications demanding fast switching speeds and low power consumption within standard 5 V logic environments.

Replacement Considerations

SN74CBT3251RGYR is a documented equivalent offering identical functionality in a VQFN-16 package.