PI3A125BTAEX

Overview

The PI3A125BTAEX is a single-pole single-throw (SPST) normally closed CMOS analog switch manufactured by Diodes Incorporated. It operates within a wide supply voltage range of 1.65V to 6.0V and supports rail-to-rail signal ranges. The device features low on-resistance, reaching a maximum of 8Ω at 3.0V and 12Ω at 1.65V. It provides fast transition speeds with turn-on times as low as 2ns at 5.0V and high off-isolation of -63dB at 10MHz. The control input tolerates up to 6.0V independently of the supply voltage. It includes power-off protection on I/O pins and break-before-make switching capabilities. The component is housed in a 5-pin SOT23 package and functions over an extended industrial temperature range from -40°C to +85°C.

Feature Summary

• CMOS technology designed for bus and analog applications
• Wide operating supply voltage range from 1.65V to 6.0V
• Rail-to-rail signal handling capability
• Control input overvoltage tolerance up to 6.0V

Applications

• Audio and video signal switching and routing
• Cell phones and portable instrumentation
• Battery-powered communication systems
• Mechanical relay replacement in computer peripherals

Procurement Notes

Verify the specific ordering suffix TAEX against official Diodes Incorporated documentation to confirm the SOT23-5L package type and tape-and-reel packaging configuration. Ensure that the procurement specifications align with the manufacturer's current product lifecycle status, as this component may be subject to change or obsolescence notices. Cross-reference the part number with authorized distributors to validate authenticity and traceability before finalizing orders.

Selection Notes

Select the PI3A125BTAEX when designing circuits requiring a single-channel analog switch with low on-resistance across a broad voltage spectrum. Consider its 6.0V control input tolerance for interfacing with logic levels that exceed the supply voltage. Evaluate the -63dB off-isolation and 500MHz bandwidth for high-frequency signal integrity requirements. Confirm that the SOT23-5L package dimensions fit the available PCB real estate constraints.

Part Context

This component belongs to the PI3A125 family of SPST analog switches produced by Pericom Semiconductor Corporation, which was subsequently acquired by Diodes Incorporated. The family includes variants such as the PI3A125C and PI3A125BCE, distinguished primarily by their packaging options like SC70-5 and SOT23-5. These devices are engineered for low-distortion signal routing in portable electronic equipment where space efficiency and low power consumption are critical design parameters.

Replacement Considerations

Direct substitutes within the same family include the PI3A125BCE, which utilizes an SC70-5 package instead of SOT23-5. Verify pinout compatibility and electrical characteristics before implementing any cross-package replacements. Consult official datasheets to ensure functional equivalence regarding on-resistance and isolation metrics.