SN74CBT3125DR

Overview

The SN74CBT3125DR is a quadruple FET bus switch manufactured by Texas Instruments, housed in a 14-pin SOIC surface-mount package. It operates within a supply voltage range of 4 V to 5.5 V and supports data rates up to 66 MHz. The device features independent line switches with standard '125-type pinout compatibility. Key electrical specifications include a maximum on-resistance of 5 Ω and a propagation delay of 10 ns. It functions across an operating temperature range from -40°C to +85°C.

Feature Summary

• Supports partial-power-down mode operation via Ioff circuitry to prevent excessive current draw during power transitions
• Provides rail-to-rail switching capability on data input/output ports for full signal integrity
• Features independent control lines for each switch channel allowing flexible bus management

Applications

• High-speed data routing in portable consumer electronics
• Signal switching in telecommunications equipment
• Bus isolation in computing systems requiring low insertion loss

Procurement Notes

Verify the specific suffix DR against the manufacturer's official documentation to confirm the tape-and-reel packaging configuration and ensure compliance with RoHS directives. Confirm that the lead-free designation matches current environmental standards required for your assembly process before finalizing procurement orders.

Selection Notes

Select this component when designing circuits requiring low on-resistance and high bandwidth for bidirectional data transfer. Ensure the system voltage remains within the 4 V to 5.5 V operational window. Consider the SOIC-14 package dimensions for PCB layout constraints and verify thermal dissipation requirements for the intended operating environment.

Part Context

This part belongs to the SN74CBT3125 family of quadruple FET bus switches. It serves as a general-purpose solution for connecting buses in high-speed digital systems. The device is designed to replace traditional mechanical switches or slower electronic alternatives, offering superior performance in terms of speed and power consumption for modern embedded applications.

Replacement Considerations

The SN74CBT3125D is a compatible variant offered in a TSSOP-14 package. Verify pinout compatibility and package footprint differences before substitution. Ensure that any alternative component maintains the same 5 Ω on-resistance and 5.5 V maximum rating to guarantee functional equivalence.