PI3B3253LE

Signal Switches, Multiplexers, Decoders Overview

The PI3B3253LE is a 3.3V Dual 4:1 Multiplexer/Demultiplexer featuring Hi-Z outputs and pinout compatibility with the PI74FCT253T, 74F253, and 74ALS/AS/LS 253 logic families. It utilizes NanoSwitch technology to connect inputs to outputs with low on-resistance of 5Ω, eliminating additional ground bounce noise or propagation delay. The device operates within an ambient temperature range of -40°C to +85°C and supports a supply voltage of 3.3V ±10%. It is housed in a 16-pin TSSOP package.

Signal Switches, Multiplexers, Decoders Feature Summary

• Features near-zero propagation delay and fast switching speed with a maximum bus disable time of 5.2ns.
• Provides ultra-low quiescent power consumption with typical current draw of 0.2µA.
• Ensures signal integrity by connecting inputs to outputs with low on-resistance without adding ground bounce noise.
• Maintains pin compatibility with standard 74 series 253 logic devices for direct replacement.

Signal Switches, Multiplexers, Decoders Applications

• Notebook computer systems
• High-speed data routing interfaces
• Bus exchange applications

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify that the ordering suffix 'L' corresponds specifically to the 16-pin, 173mil wide plastic TSSOP package configuration. Confirm compliance with RoHS directives and ensure the component meets halogen-free and antimony-free requirements as defined by the manufacturer's green product standards before finalizing procurement specifications.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when a dual 4:1 mux/demux solution is required that maintains electrical compatibility with legacy 74FCT253 and 74ALS/AS/LS 253 designs. It is suitable for applications demanding minimal signal degradation and low power dissipation. Ensure the design accommodates the specific 16-pin TSSOP footprint and thermal characteristics associated with this package type.

Signal Switches, Multiplexers, Decoders Part Context

This part belongs to the PI3B3253 family of multiplexer switches manufactured by Diodes Incorporated under the CBTLV/3B series. The family includes variants such as the QSOP (Q) and UQFN (ZHD) packages. The PI3B3253LE specifically denotes the lead-free, green version packaged in the TSSOP format, designed for surface-mount assembly in compact electronic circuits.

Signal Switches, Multiplexers, Decoders Replacement Considerations

Direct pin-compatible replacements include the PI74FCT253T, 74F253, and 74ALS/AS/LS 253 logic devices. Verify that substitute components meet the same 3.3V operating voltage and low on-resistance requirements to maintain system performance.

Signal Switches, Multiplexers, Decoders FAQ

Does the PI3B3253LE add significant propagation delay to the signal path?

No, the device features near-zero propagation delay. The bus switch contributes no propagational delay other than the RC delay of the switch's on-resistance and load capacitance, which is approximately 0.25ns for a 50pF load.

What is the maximum bus disable time for this component?

The maximum bus disable time (tPHZ/tPLZ), which is the time from the enable input going low to the output going high-impedance, is 5.2ns.