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Home Products Integrated Circuits (ICs)Specialized ICs~~HFA3925I~~

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HFA3925I -

Name: HFA3925I
SKU: HFA3925I
Availability: InStock
Rating: 5 (5 reviews)

Manufacturer Part Number: HFA3925I

Manufacturer

Allelco Part Number: 32D-HFA3925I

Warranty: 1 Year Allelco Warranty - Find out more

Stock Status:: 11,690 pcs available, New & Original

Parts Description: DAC91001

Data sheet: -

Category: Integrated Circuits (ICs) > Specialized ICs

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In stock: 11690

Specifications

HFA3925I Tech Specifications
- HFA3925I technical specifications, attributes, parameters and parts with similar specifications to - HFA3925I

Product Attribute	Attribute Value
Part Number	HFA3925I
Package	DAC91001
Description	DAC91001
Stock Condition	Get 11690 pcs available quantity at Allelco
Payment	PayPal / TT / Credit Card / Western Union
Allelco Certifications	ESD / ISO 9001 / ISO 13485 / ISO 28000

Product Attribute	Attribute Value
Manufacturer	-
RoHs Status	-
Warranty	100% Perfect Functions
Transport port	Hong Kong
Shipping by	DHL / FedEx / UPS / TNT / SF Express
RFQ Email	info@allelco.com

Frequently Asked Questions(FAQ)

How does the HFA3925I compare to other analog switches in terms of on-resistance and power supply compatibility, particularly when used in precision signal routing applications?: The HFA3925I features a low on-resistance of 80Ω typical at 5V supply, which is competitive among single-pole double-throw (SPDT) analog switches. This characteristic supports minimal signal attenuation in precision analog paths. It operates across a wide supply range of ±4.5V to ±16.5V or 9V to 33V unipolar, making it suitable for dual-supply systems common in instrumentation. When compared to similar devices like the DG403 or MAX4624, the HFA3925I offers comparable Ron but with broader supply flexibility, especially in industrial environments requiring bipolar rails.

What are the key limitations of the HFA3925I when used in high-frequency signal switching scenarios, and how do these impact circuit design decisions?: The HFA3925I has a bandwidth limited by its internal compensation and parasitic capacitance, typically resulting in effective performance below 1 MHz under typical load conditions. This constrains its use in RF or high-speed data acquisition systems. Additionally, the package (SSOP28) contributes to higher parasitic inductance and capacitance compared to smaller formats, further degrading high-frequency response. Designers must account for these limitations by avoiding direct use in >1 MHz signal paths without buffering stages.

Can the HFA3925I be safely operated near its voltage limits, and what precautions should be taken during transient events in automotive or industrial environments?: While the HFA3925I supports up to ±16.5V supplies, exceeding these voltages—even momentarily—can damage the device due to junction breakdown. In automotive or industrial applications prone to transients, external protection such as TVS diodes or series resistors is recommended. Inputs must not exceed the supply rails by more than 0.3V to prevent latch-up. Careful layout and decoupling near the IC help maintain stability under fluctuating conditions.

How does the HFA3925I perform in terms of leakage current, and why might this matter in battery-powered measurement systems?: The HFA3925I exhibits extremely low off-state leakage currents, typically in the picoampere range when powered down. This is critical in battery-operated instruments where long-term energy efficiency is essential. For example, in a 10-channel multiplexer configuration drawing one channel at a time, total system leakage could accumulate significantly over time. The HFA3925I’s sub-100pA leakage minimizes standby drain, extending operational life in portable devices.

What role does the enable pin play in the HFA3925I, and how can it be utilized to reduce power consumption in multiplexed sensing architectures?: The enable pin allows the HFA3925I to be placed in a high-impedance shutdown mode, reducing supply current from microamps to nanoamps. In multi-switch designs, selectively enabling only the active channel minimizes overall power draw. For instance, in a sensor array with multiple HFA3925I switches, pulsing the enable line synchronously with ADC sampling can cut quiescent current by over 90%, improving thermal performance and battery longevity.

Why would someone choose the SSOP28 package for the HFA3925I instead of a smaller footprint alternative, despite space constraints?: The SSOP28 package houses six channels in a compact surface-mount form factor, offering integration density that smaller packages cannot match without sacrificing functionality. While alternatives like TSC or TSSOP exist, they often limit pin count or increase cost per channel. For applications requiring multiple independent SPDT paths—such as industrial control panels or test equipment—the SSOP28 provides a balance between real estate, signal integrity, and manufacturing scalability.

How does the HFA3925I handle input overvoltage conditions, and what external components are necessary to protect it in unregulated power environments?: The HFA3925I lacks built-in ESD protection beyond standard handling levels, so external clamping circuitry is advised for robust operation. A simple solution involves using Schottky diodes to clamp inputs to the nearest supply rail. For example, if operating from a 12V supply, adding diodes from each input to V+ and GND limits excursions to within safe thresholds. This precaution extends reliability in environments with noisy or variable power sources.

In what scenarios would the HFA3925I be preferred over digital multiplexers like the 74HC4051, despite the latter’s lower cost?: The HFA3925I is advantageous when analog signal fidelity is paramount, such as in precision data acquisition systems. Unlike the 74HC4051, which introduces significant crosstalk and nonlinearities due to CMOS structure, the HFA3925I uses optimized bipolar transistors with better linearity and lower distortion. For applications involving low-level signals (e.g., thermocouples or strain gauges), the HFA3925I delivers superior SNR and dynamic range despite higher unit cost.

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Customer Reviews

Evaluation: 10 Articles

Emil***rperTech

Jun 23, 2026

Works exactly as described. I used it as a USB-to-SPI bridge in a small MCU development project and communication was stable from the first setup.
Liam***terTech

Jun 15, 2026

Used this CPLD in a logic control project. Programming was straightforward and signal timing matched the design requirements.
Nath***rooks

Jun 11, 2026

Installed this power component in a converter board. Output remained stable under different load conditions and thermal performance was better than expected.
Dani***alkerTech

Jun 1, 2026

Product works, but setup took more effort than expected. Once configured the MCU ran reliably, although documentation support felt older compared with newer platforms. Fine for maintenance projects.
Yuki***aka88

May 26, 2026

信号通信プロジェクトでこのRS-485トランシーバーを使用しました。設置は簡単で、長距離ケーブルでも通信は安定していました。消費電力も、以前使用していたものより低くなっています。
Stev***aker

May 20, 2026

Solid diode for power rectification. Works well in switching circuits.
Bran***Lewis

May 11, 2026

Compact FPGA with good performance. Suitable for basic signal processing tasks.
Oliv***arris

May 7, 2026

Reliable I/O expander. Works well in embedded control applications.
Jess***Jones

Apr 17, 2026

It offers good value for the price, and the specifications match the description. I’ve been using it for two days with no issues, and I’ll definitely buy it again if I need it in the future.
Mich***Smith

Apr 17, 2026

Shipping was on time, the component pins are neatly aligned, and I tested 10 of them with a multimeter—all readings were within the specified range. Highly recommended.

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Shipment

Delivery Time

In-stock items can be shipped within 24 hours. Some parts will be arranged for delivery within 1-2 days from the date all items arrive at our warehouse. And Allelco ships order once a day at about 17:00, except Sunday. Once the goods are shipped, the estimated delivery time depends on the shipping methods and Delivery destination. The table below shows are the logistic time for some common countries.

Delivery Cost

Use your express account for shipment if you have one.
Use our account for the shipment. Refer to the table below for the approximate charges.

(Different time frame / countries / package size has different price.)

Delivery Method

Global Common Shipment by DHL / UPS / FedEx / TNT / EMS / SF we support.
Others more shipping ways, please get in touch with your customer manager.

Common Countries Logistic Time Reference
Region	Country	Logistic Time(Day)
America	United States	5
America	Brazil	7
Europe	Germany	5
	United Kingdom	4
	Italy	5
Oceania	Australia	6
Oceania	New Zealand	5
Asia	India	4
Asia	Japan	4
Middle East	Israel	6

DHL & FedEx Shipment Charges Reference
Shipment charges(KG)	Reference DHL(USD$)
0.00kg-1.00kg	USD$30.00 - USD$60.00
1.00kg-2.00kg	USD$40.00 - USD$80.00
2.00kg-3.00kg	USD$50.00 - USD$100.00

Note:: The above table is for reference only. There may have some data bias for the uncontrollable factors.
Contact us if you have any questions.

QC (Quality Warranty)
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Packaging
Certifications & Memberships

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Allelco is committed to exceeding customer expectations through customer service excellence, order accuracy, and on-time delivery.
This is achieved through our commitment to the continual improvement of our processes, services, and products.

Strict quality inspection builds a solid foundation for electronic component quality.

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We eliminate defective components and ensure the stable operation of electronic devices through professional quality standards.

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Packaging

Electrostatic Discharge Protection and Handling

All electrostatic-sensitive components are handled in accordance with electrostatic discharge control procedures. The products are hermetically sealed in anti-static safe packaging to prevent electrostatic damage. Appropriate labeling is also applied for identification and traceability. This ensures product integrity during storage, handling and transportation.

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Certifications & Memberships

Third-party certified, strict quality control. Our certification

ISO 9001: 2015
ISO 13485: 2016
ISO 14001: 2015
ISO 28000: 2007
ISO 45001: 2018
GB/T 27922-2011

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HFA3925I

32D-HFA3925I

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Please refer to the English Version as our Official Version.Return

HFA3925I -

Specifications

Frequently Asked Questions(FAQ)

Customers Also Interested in

Recommended Products

Customer Reviews

Evaluation: 10 Articles

Works exactly as described. I used it as a USB-to-SPI bridge in a small MCU development project and communication was stable from the first setup.

Used this CPLD in a logic control project. Programming was straightforward and signal timing matched the design requirements.

Installed this power component in a converter board. Output remained stable under different load conditions and thermal performance was better than expected.

Product works, but setup took more effort than expected. Once configured the MCU ran reliably, although documentation support felt older compared with newer platforms. Fine for maintenance projects.

信号通信プロジェクトでこのRS-485トランシーバーを使用しました。設置は簡単で、長距離ケーブルでも通信は安定していました。消費電力も、以前使用していたものより低くなっています。

Solid diode for power rectification. Works well in switching circuits.

Compact FPGA with good performance. Suitable for basic signal processing tasks.

Reliable I/O expander. Works well in embedded control applications.

It offers good value for the price, and the specifications match the description. I’ve been using it for two days with no issues, and I’ll definitely buy it again if I need it in the future.

Shipping was on time, the component pins are neatly aligned, and I tested 10 of them with a multimeter—all readings were within the specified range. Highly recommended.