S-UM6532

Overview

The S-UM6532 is a low charge injection, 64-channel single-pole single-throw (SPST) high-voltage analog switch IC designed for ultrasound imaging applications. It operates on a single +5V power supply without requiring a separate high-voltage source. The device supports an analog signal voltage range of 0V to ±100V with ±150V overshoot capability and handles frequencies from 10kHz to 70MHz. Key electrical parameters include a typical on-resistance of 6Ω, 2A peak current per channel, and 15pC charge injection into a 1000pF load. It features user-selectable serial digital or bank interfaces, embedded thermal protection, and RoHS compliant 15x15mm BGA packaging.

Feature Summary

• Single +5V power supply operation eliminates the need for external high-voltage power sources.
• User-selectable control interface allows configuration between 64-bit serial shift registers and 4-bank parallel inputs.
• Integrated thermal protection circuit provides a flag indicator output when temperature thresholds are exceeded.
• Low charge injection and low off-isolation characteristics ensure signal integrity in high-frequency analog paths.

Applications

• Ultrasound imaging systems
• Medical diagnostic equipment
• High-voltage analog signal routing

Procurement Notes

Verify component authenticity by cross-referencing the manufacturer marking with official datasheet specifications. Confirm package type matches the required land pattern for the 15x15mm BGA form factor. Ensure storage conditions adhere to humidity and temperature guidelines to prevent moisture-induced damage during soldering processes.

Selection Notes

Select this component when designing ultrasound front-end circuits requiring high-voltage switching capabilities driven by standard logic levels. Consider the 6Ω on-resistance and 2A peak current limits relative to the probe impedance. Evaluate the trade-off between serial and bank interface speeds based on system frame rate requirements.

Part Context

This component belongs to ABLIC's high-voltage analog switch family, specifically engineered for medical ultrasound transducer arrays. It replaces older solutions requiring complex dual-supply architectures by integrating high-voltage tolerance within a single low-voltage powered IC. The design focuses on minimizing signal distortion through low charge injection and precise on-resistance matching across all channels.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing board layouts if considering alternative vendors, as pin configurations and thermal pad designs may differ significantly.

FAQ

Does the S-UM6532 require a negative power supply?

No, the device operates solely on a single +5V positive power supply (VDD) and a logic supply (VLL) ranging from 1.8V to 5V.

What is the maximum analog signal voltage the switches can handle?

The steady-state analog signal range is ±100V, with a peak overshoot capability of ±150V for pulses up to 500ns.

How is the bleed resistor configured?

The S-UM6532 includes a user-selectable 40kΩ bleed resistor on the probe side, which can be enabled or disabled via the R_ENB input pin.