SN74CBT3253D

Overview

The SN74CBT3253D is a dual 1-of-4 FET multiplexer/demultiplexer switch IC from Texas Instruments. It operates within a supply voltage range of 4 V to 5.5 V, with a typical operating voltage of 5 V. The device features two independent channels configured as 2 x 1:4 switches. Key electrical specifications include a maximum on-resistance of 12 Ohms, a maximum propagation delay of 6.7 ns, and a maximum turn-off time of 6.1 ns. It supports a bandwidth of 200 MHz and draws a maximum power supply current of 3 uA. The component is rated for an operating temperature range from -40°C to +85°C.

Feature Summary

• Dual-channel architecture providing two independent 1-of-4 multiplexing paths
• Low on-resistance characteristic ensuring minimal signal attenuation
• High-speed switching capability suitable for data bus applications
• Low static power consumption design

Applications

• Data bus switching in portable equipment
• Signal routing in consumer electronics
• Multiplexing in industrial control systems

Procurement Notes

Verify the specific suffix (e.g., D, DBR, DGVR) to confirm the exact package type such as SOIC or SSOP, as these affect physical dimensions and pinout compatibility. Confirm moisture sensitivity level requirements for surface mount assembly processes. Ensure the selected variant matches the required operating temperature range and supply voltage specifications for the target application environment.

Selection Notes

Select this component when a dual 1-of-4 configuration is required within a 5 V logic system. Compare against similar parts like the SN74CBT3251 if an 8-channel single-path topology is needed instead. Consider the SN74CB3T3253 if lower voltage operation below 3.6 V is necessary. Evaluate package constraints to choose between VQFN, SSOP, or SOIC options based on board space and thermal management needs.

Part Context

This part belongs to the SN74CBT3253C series of high-speed CMOS analog switches. It is designed for low-voltage digital applications requiring fast switching speeds and low distortion. The series is commonly used in battery-powered devices where power efficiency and signal integrity are critical. It complements other Texas Instruments logic families focused on signal routing and bus switching solutions.

Replacement Considerations

Check for direct substitutes such as SN74CBT3253DBR or SN74CBT3253DGVR which share identical electrical characteristics but differ in packaging. Verify pin-to-pin compatibility before substitution.