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HomeProductsIntegrated Circuits (ICs)Specialized ICsSP232ACT
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SP232ACT - SIPEX

Manufacturer Part Number
SP232ACT
Manufacturer
SIPEX
Allelco Part Number
32D-SP232ACT
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
12,000 pcs available, New & Original
Parts Description
DAC91001
Data sheet
-
Category
Integrated Circuits (ICs) > Specialized ICs
RoHs Status
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In stock: 12000

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Specifications

SP232ACT Tech Specifications
SIPEX - SP232ACT technical specifications, attributes, parameters and parts with similar specifications to SIPEX - SP232ACT

Product Attribute Attribute Value
Part Number SP232ACT
Package DAC91001
Description DAC91001
Stock Condition Get 12000 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 SP232ACT from Nuvoton Technology Corp. compare to other RS-232 transceivers in terms of power consumption and operating voltage for embedded systems requiring 5V logic compatibility?
The SP232ACT operates exclusively at 5V supply voltage, matching the I/O levels of many legacy microcontrollers without level shifting, which simplifies interfacing in 5V-only systems. While typical RS-232 transceivers like the MAX232 consume around 8mA under load at 5V, the SP232ACT draws approximately 4mA, offering lower quiescent current. This reduced power draw can extend battery life in portable applications. However, its maximum baud rate of 120kbps is lower than modern alternatives such as the MAX3232 (up to 1Mbps), making it less suitable for high-speed serial communication. The fixed 5V operation limits flexibility in mixed-voltage environments compared to devices supporting 3.3V or dual supplies.
What are the key limitations of using the SP232ACT in high-reliability industrial applications compared to more robust RS-232 interface solutions?
The SP232ACT has a maximum operating temperature of 70°C, which restricts its use in harsh environments where ambient temperatures exceed this threshold, such as in motor control panels or automotive under-the-hood systems. In contrast, industrial-grade RS-232 transceivers typically support -40°C to +85°C. Additionally, the SP232ACT lacks built-in protection features like ESD immunity beyond standard levels, increasing vulnerability to voltage surges common in field wiring. Its baud rate cap at 120kbps also limits throughput in data-intensive industrial protocols, making it less ideal for applications using UARTs at higher speeds.
Can the SP232ACT be used in a multi-drop RS-232 configuration with multiple devices sharing the same line, and what design precautions should be taken?
No, the SP232ACT is not designed for multi-drop configurations due to its single-channel nature and limited drive capability. Standard RS-232 drivers require strong output levels to maintain signal integrity over long cables and multiple loads. The SP232ACT provides typical ±6V outputs, which may degrade when driving multiple receivers simultaneously, leading to signal distortion and communication errors. For such topologies, dedicated multi-drop transceivers or RS-485 interfaces are recommended. If RS-232 must be used, only one receiver should be connected per driver to ensure reliable operation.
What considerations apply when integrating the SP232ACT into a PCB layout with mixed-signal components to minimize noise coupling?
When placing the SP232ACT on a mixed-signal board, it should be isolated from high-speed digital traces and analog sections to prevent crosstalk. A ground plane should surround the SOIC16 package to reduce electromagnetic interference. Decoupling capacitors—10µF electrolytic and 0.1µF ceramic—should be placed within 1cm of the VCC and GND pins. Since the device uses charge pumps to generate ±10V internally from a 5V supply, care must be taken to shield input/output lines from switching noise. Routing TXD/RXD away from clock signals and using guard traces can further improve signal fidelity.
How does the surface-mount packaging of the SP232ACT affect soldering process parameters, and what risks exist during reflow?
The SP232ACT comes in an SOIC16 (SOP16) package, which requires standard reflow soldering techniques. The maximum peak temperature during reflow must not exceed 260°C for more than 10 seconds to avoid thermal damage. Prolonged exposure above this threshold can degrade internal charge pump components. Solder paste selection (e.g., Type 4 or finer) is critical for fine-pitch joints to prevent bridging between adjacent pins, especially on compact PCBs. Proper alignment during placement is essential due to the lack of polarity markings, though orientation is typically indicated by a dot on the body.
Is the SP232ACT suitable for battery-powered IoT edge devices, and what trade-offs exist between power efficiency and functionality?
The SP232ACT consumes about 4mA when active, which is relatively high for low-power IoT nodes that often target µA-level sleep currents. While it eliminates the need for external voltage regulators or level shifters when interfacing with 5V sensors, its static current draw may reduce battery life significantly if used continuously. Devices with lower baud rates (e.g., 9600 bps) still draw near-maximum current regardless of data rate, limiting energy savings. Alternative solutions like UART-to-I²C bridges or ultra-low-power RS-485 transceivers may offer better power efficiency for intermittent communication tasks.
What happens to the SP232ACT’s performance when operated near the minimum or maximum specified baud rates, and how do real-world conditions affect reliability?
At 120kbps, the SP232ACT approaches its baud rate limit; clock jitter and oscillator drift in low-cost crystal circuits can cause framing errors or missed data bytes under marginal timing conditions. At lower baud rates like 19.2kbps, performance remains stable, but start/stop bit tolerances become tighter relative to signal rise times. In practice, long cable runs (>10 meters) introduce propagation delay and capacitance, further degrading timing margins at higher speeds. Therefore, reliable operation at 120kbps requires short connections and clean power rails. Deviations outside datasheet specs may lead to intermittent failures in production environments.
How does the SP232ACT handle transient voltage spikes on the RX/TX lines, and what external protections are recommended?
The SP232ACT does not include internal transient protection beyond basic ESD diodes rated at ±8kV contact discharge per IEC 61000-4-2. Real-world RS-232 lines exposed to plug insertion or inductive loads can experience voltage spikes exceeding ±15V. To mitigate risk, external TVS diodes with clamping voltages around ±15V should be placed close to the connector. Series resistors (10–100Ω) can dampen ringing and reduce stress on internal circuitry. Without these, repeated exposure to transients may degrade the charge pump or input stages over time, leading to permanent failure.
In what scenarios would the SP232ACT be preferable over a dual-supply RS-232 transceiver like the MAX232, despite its lower data rate?
The SP232ACT is advantageous when space and component count are critical and the system already operates at 5V logic levels. Its single-supply design eliminates the need for a negative voltage generator, reducing BOM complexity and board footprint. In simple sensor networks or legacy terminal adapters where communication speed is capped below 96kbps, the SP232ACT’s lower current draw and integrated design outweigh the MAX232’s higher bandwidth. Additionally, in retrofit projects replacing older RS-232 modules, the SP232ACT ensures backward compatibility without redesigning power architecture.
What testing methodology should be used to validate the SP232ACT in a custom RS-232 interface before final deployment?
Functional testing should include loopback verification using TXD connected to RXD to confirm signal generation and reception. A logic analyzer or oscilloscope should monitor TXD output for correct amplitude (±5V to ±15V) and timing at various baud rates up to 120kbps. Receiver sensitivity can be tested by injecting attenuated RS-232 signals to verify error-free decoding at minimum thresholds. Stress tests involving temperature cycling (0°C to 70°C) and prolonged operation under full load help identify latent defects. Finally, EMI susceptibility tests ensure robustness against nearby RF sources common in industrial settings.
Can the SP232ACT operate reliably in environments with frequent power cycling, and what initialization behavior should designers expect?
Yes, the SP232ACT supports power-up and power-down cycles within its specified voltage range. However, rapid power sequencing (e.g., toggling 5V rail faster than 1ms intervals) may cause erratic startup behavior due to charge pump instability. During power-up, internal oscillators may take up to 10ms to stabilize, so UART peripherals should delay transmission until after this period. Some designs add soft-start circuitry or enable signals to synchronize with microcontroller reset sequences, preventing false characters or lockups during boot.
How does the absence of detailed application notes from the manufacturer impact the effective use of the SP232ACT in complex system integration?
Limited documentation increases reliance on reverse-engineered knowledge and community examples, which may omit subtle design considerations. Without official guidance, engineers must infer optimal decoupling strategies, grounding practices, and signal routing rules from similar devices. This can lead to suboptimal layouts that compromise noise immunity or increase susceptibility to EMI. Cross-referencing with equivalent parts like the SP230E or SP232B can provide indirect insights, but assumptions based on partial data raise risk in safety-critical deployments.

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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.

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Delivery Method

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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.
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Allelco is committed to exceeding customer expectations through customer service excellence, order accuracy, and on-time delivery.
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SP232ACT

SIPEX
32D-SP232ACT

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