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HomeProductsIntegrated Circuits (ICs)Specialized ICsSP231ACT
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SP231ACT - SIPEX

Manufacturer Part Number
SP231ACT
Manufacturer
SIPEX
Allelco Part Number
32D-SP231ACT
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
15,810 pcs available, New & Original
Parts Description
DAC91001
Data sheet
-
Category
Integrated Circuits (ICs) > Specialized ICs
RoHs Status
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Our certification
In stock: 15810

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Specifications

SP231ACT Tech Specifications
SIPEX - SP231ACT technical specifications, attributes, parameters and parts with similar specifications to SIPEX - SP231ACT

Product Attribute Attribute Value
Part Number SP231ACT
Package DAC91001
Description DAC91001
Stock Condition Get 15810 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 SIPEX
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 SP231ACT's operating voltage range compare to typical RS-232 transceiver requirements, and what implications does this have for 5V microcontroller compatibility?
The SP231ACT operates from a single +5V supply with an absolute maximum rating of 7V, which aligns closely with standard TTL logic levels used in most microcontrollers. This makes it suitable for direct interfacing with 5V systems without requiring additional level shifting. However, compared to modern low-voltage RS-232 transceivers that support 3.3V operation, the SP231ACT lacks flexibility in mixed-voltage environments. The 5V-centric design means careful attention must be paid to input threshold compatibility when connecting to 3.3V logic peripherals, as excessive voltage differentials could stress components.
What are the key differences between the SP231ACT and newer CMOS-based RS-232 transceivers like the MAX3232 in terms of power consumption and noise immunity?
Unlike the SP231ACT’s bipolar technology, modern CMOS devices such as the MAX3232 offer significantly lower quiescent current—often below 1mA versus several mA for the SP231ACT—and improved electrostatic discharge (ESD) protection exceeding ±15kV. While the SP231ACT provides adequate performance for basic UART-to-RS232 conversion, its higher drive current (up to 10mA per driver) and limited ESD robustness make it less ideal for industrial or portable applications where power efficiency and reliability under transient conditions are critical.
When selecting between the SP231ACT and alternative solutions, how should one evaluate trade-offs involving driver load capacity and signal integrity over longer cable runs?
The SP231ACT supports driving ±10V signals across standard RS-232 loads, but its finite output slew rate and lack of built-in slew-rate control can lead to ringing and electromagnetic interference on unterminated lines. For cables longer than 15 meters, external termination resistors or buffer stages may be needed. In contrast, integrated solutions with controlled slew rates reduce EMI and improve stability at the cost of increased component count and footprint—important considerations in space-constrained designs.
Can the SP231ACT be used safely in automotive or industrial environments without additional protection circuitry?
The SP231ACT is not rated for automotive-grade temperature ranges (-40°C to +85°C operation requires qualification beyond standard commercial parts). In industrial settings subject to voltage transients or surges, supplemental protection using TVS diodes is strongly recommended due to its relatively modest ESD tolerance (~±2kV HBM). Without such safeguards, repeated exposure to ESD events during hot-plug operations can degrade or destroy the device.
How does the SP231ACT handle simultaneous transmit and receive operations, and what impact does this have on full-duplex communication reliability?
The SP231ACT supports true full-duplex operation via two independent drivers and receivers, enabling simultaneous bidirectional data flow. However, internal propagation delays between transmit and receive paths are not tightly matched, which can affect timing margins in high-speed applications (>19.2 kbps). Designers should account for these asymmetries when implementing flow control protocols or ensuring clean signal isolation between TX and RX lines.
What layout and PCB design practices are essential when integrating the SP231ACT to minimize noise coupling and ensure reliable UART communication?
Due to its relatively high drive current and analog nature, the SP231ACT demands careful decoupling: place a 10µF tantalum capacitor and a 0.1µF ceramic capacitor close to the VCC pin, with short traces to ground. Keep RS-232 I/O traces away from digital clock signals and maintain guard rings around sensitive receiver inputs. Ground planes should be uninterrupted beneath the IC, and unused package pins must either be tied appropriately or left floating only if datasheet permits.
Is the SP231ACT suitable for battery-powered devices, and what modifications would improve its efficiency in low-power applications?
While functional, the SP231ACT draws more quiescent current than modern alternatives, making it suboptimal for long-life battery systems. If used, disable unused drivers by grounding their inputs or using enable pins where available, and consider switching to sleep modes on the host MCU to reduce overall system current. However, dedicated low-power RS-232 transceivers with shutdown functionality remain preferable for energy-sensitive designs.
How do environmental factors such as humidity and temperature cycling affect the long-term reliability of the SP231ACT in enclosure-mounted applications?
As a plastic SOP16 packaged device, the SP231ACT is susceptible to moisture ingress during soldering if not handled per IPC standards (e.g., bake cycles before reflow). Thermal cycling between -20°C and +70°C can exacerbate coefficient-of-expansion mismatches at the die interface, potentially leading to bond wire fatigue over time. For harsh environments, conformal coating or metal-cased alternatives provide better environmental sealing.
What are the implications of using the SP231ACT in multi-drop RS-485 configurations instead of dedicated transceiver ICs?
The SP231ACT is designed for point-to-point RS-232 links, not multi-drop topologies. Attempting to use it in half-duplex RS-485 networks violates its electrical specifications and risks damaging outputs when multiple drivers activate simultaneously. Even in isolated scenarios, its single-ended signaling lacks the differential noise rejection required for robust multi-drop communication—rendering it unsuitable without significant circuit redesign and added isolation.

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Customer Reviews

Evaluation: 10 Articles

  • 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.

  • Aman***arris
    Apr 3, 2026

    It was great—the entire process, from placing the order to receiving the package, went very smoothly. The components were consistent, the price was fair, and I had a very pleasant shopping experience.

  • Mike***nch
    Apr 3, 2026

    Better than expected! The resistance and capacitance readings were spot-on, and it passed the test on the first try. The service was reliable, and the packaging was thoughtful—I highly recommend it.

  • Daic***K.
    Mar 23, 2026

    Very good. No issue after long time testing.

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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

  1. Use your express account for shipment if you have one.
  2. 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

  1. Global Common Shipment by DHL / UPS / FedEx / TNT / EMS / SF we support.
  2. 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
Brazil 7
Europe Germany 5
United Kingdom 4
Italy 5
Oceania Australia 6
New Zealand 5
Asia India 4
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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QC (Quality Warranty)

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.
  1. Visual inspection
  2. Performance testing and reliability verification
  3. Standardized full-process testing
  4. Precise control of every parameter
We eliminate defective components and ensure the stable operation of electronic devices through professional quality standards.
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Payment Support

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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.


ESD

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
  • SMTA
  • IPC
  • ESD
  • PSMA

SP231ACT

SIPEX
32D-SP231ACT

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