CBT3251D,118

Signal Switches, Multiplexers, Decoders Overview

The CBT3251D,118 is a single-pole, 8-throw bus switch manufactured by Nexperia USA Inc. It features an output enable input (OE) and three select inputs (S0, S1, S2). The device operates within a supply voltage range of 4.5 V to 5.5 V and supports an operating temperature range from -40 °C to +85 °C. Key electrical parameters include a maximum ON resistance of 7 Ω at VCC = 4.5 V and 15 Ω at VCC = 2.4 V. Propagation delay through the switch is specified as a maximum of 0.25 ns.

Signal Switches, Multiplexers, Decoders Feature Summary

• Provides direct interface compatibility with TTL logic levels
• Includes IOFF circuitry to facilitate partial power-down mode operation
• Features overvoltage tolerant control inputs capable of handling up to 5.5 V
• Offers latch-up protection exceeding 100 mA per JEDEC standard JESD78 class II level A

Signal Switches, Multiplexers, Decoders Applications

• Multiplexing and demultiplexing data buses
• Routing signals between different system components
• Creating configurable signal paths in digital circuits

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific package variant during procurement, as the CBT3251 family includes both SO16 and TSSOP16 options. Confirm that the selected component matches the required temperature range and pin configuration for your design. Ensure all unused control inputs are properly terminated to VCC or GND to guarantee correct device functionality and avoid undefined states.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when a low-profile, high-speed 1-of-8 multiplexer is required for 5 V logic systems. Consider the SO16 package for standard surface-mount assembly needs. Evaluate the propagation delay and ON resistance specifications against your signal integrity requirements. Ensure the application environment stays within the specified -40 °C to +85 °C operating temperature limits.

Signal Switches, Multiplexers, Decoders Part Context

This part belongs to the CBT series of bus switches designed for high-speed signal routing. It serves as a digital multiplexer/demultiplexer solution for connecting one common port to eight selectable ports. The device is intended for use in general-purpose digital applications requiring flexible signal path management within standard logic voltage domains.

Signal Switches, Multiplexers, Decoders Replacement Considerations

Check for compatible parts within the same CBT family that offer identical pinouts and electrical characteristics. Verify that any substitute component maintains the same package type and thermal performance. Ensure the alternative device meets the required ESD protection levels and latch-up ratings specified for the original design.

Signal Switches, Multiplexers, Decoders FAQ

How does the OE input affect the switch state?

When the Output Enable (OE) input is LOW, the switch is enabled, allowing the select inputs to route the A terminal to one of the B terminals. When OE is HIGH, the switch is disabled regardless of the select input states.

What is the function of the n.c. pin?

Pin 6 is designated as 'n.c.' (not connected). It has no internal electrical connection and should be left unconnected in the circuit layout.

How is the ON resistance defined?

The ON resistance is measured by the voltage drop between the A and Bn terminals at a specified current. The lowest voltage of the two terminals determines the ON resistance value.