SN74CBT3257PWRG4

Overview

The SN74CBT3257PWRG4 is a 4-bit 1-of-2 FET multiplexer/demultiplexer manufactured by Texas Instruments. It operates within a supply voltage range of 4 V to 5.5 V and supports an operating temperature from -40°C to 85°C. The device features TTL-compatible input levels, ensuring compatibility with standard logic families. Key electrical characteristics include a typical on-state resistance of 14 Ω at 4 V and propagation delays as low as 0.25 ns at 5 V. It utilizes a 16-pin TSSOP package.

Feature Summary

• Provides four independent high-speed analog or digital signal paths for multiplexing or demultiplexing applications.
• Features low on-state resistance to minimize signal attenuation and propagation delay during switching operations.
• Incorporates TTL-compatible control inputs that interface directly with standard logic outputs without level shifting.

Applications

• High-speed data routing in communication systems
• Signal selection in test and measurement equipment
• Peripheral interfacing in industrial control systems

Procurement Notes

Verify the specific suffix 'PWRG4' against the manufacturer's current ordering information to confirm availability and compliance status. Ensure the component matches the required TSSOP-16 package dimensions and thermal specifications for your PCB layout. Confirm RoHS compliance documentation aligns with regional regulatory requirements before finalizing procurement.

Selection Notes

Select this component when a low-resistance, high-speed 4-channel switch is required within a 4V to 5.5V supply range. Consider the TSSOP-16 package constraints and ensure the application does not exceed the absolute maximum ratings for continuous channel current or input clamp current. Verify that the TTL-compatible input thresholds match the driving logic family voltage levels.

Part Context

This part belongs to the SN74CBT3257 series of 4-bit multiplexers. It is distinct from the LV (Low Voltage) variants which operate at lower voltages. The 'G4' suffix typically indicates lead-free and RoHS-compliant manufacturing processes, while 'PW' denotes the TSSOP package type. It serves as a general-purpose switching solution for standard 5V logic systems.

Replacement Considerations

SN74CBT3257DR

FAQ

What is the function of the OE pin?

The Output Enable (OE) pin controls the state of the switches. When OE is low, the selected B port connects to the A port based on the S input. When OE is high, all switches are disconnected regardless of other inputs.

How does the device handle floating inputs?

Unused control inputs must be held at VCC or GND to ensure proper operation. Floating inputs can cause unpredictable behavior or increased power consumption due to the CMOS nature of the internal circuitry.