SP232ACT-L - 120kbps RS-232 Transceiver | MaxLinear
料号： SP232ACT-L ✓ 量产中SP232ACT-L 概述
An RS-232 transceiver is an interface IC that converts between digital logic levels and the bipolar voltage levels used by RS-232 serial links. Within the hierarchy of interface semiconductors, it sits between general-purpose logic ICs and communications transceivers. The SP232ACT-L integrates charge-pump circuitry, transmit drivers, and receive comparators to support point-to-point serial communication over cables or board-level links.
Key features include operation from a 4.5 V to 5.5 V supply, a guaranteed transmission rate of 120 kbps, and compatibility with RS-232F and ITU V.28 requirements. The device operates with 0.1 F ceramic capacitors, supports a 10 V/µs slew rate, and provides enhanced ESD protection up to ±15 kV under the cited IEC 61000-4-2 and HBM test conditions.
The BiCMOS architecture combines low-power CMOS circuitry with bipolar output stages capable of driving RS-232 loads. Its pin-compatible relationship with established industry-standard layouts simplifies replacement and PCB migration. Because the interface uses charge-pump-generated bipolar voltages for transmission, board design must account for capacitor placement, return-current flow, and ESD protection around the external connector.
Typical applications include industrial serial consoles, data acquisition systems, test and measurement equipment, embedded control interfaces, and legacy RS-232 peripheral connections. The 120 kbps rate is suitable for command and control traffic rather than high-bandwidth data transfer.
For reliable implementation, place the charge-pump capacitors close to their associated pins and provide a clean return path between the interface ground and the external connector. Confirm line voltage, cable length, and grounding before assuming the full 120 kbps specification applies to every cable and load arrangement.
This product page combines verified manufacturer and distributor information, drop-in cross-reference data, comparison parameters, and application guidance to support faster component selection, sourcing, and circuit implementation.
直接替换替代料： SP232ACT-L ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： SP232ACT-L （相同外形与封装尺寸） ——差异在于 Data Rate, Mounting Type, Package.
SP232EEN-L/TR
✅ 直接替换联系询价
查看数据手册 →SP232ACT-L 规格参数
| Device Type | RS-232 transceiver |
| Transmit Drivers | 2 |
| Receive Channels | 2 |
| Technology | BiCMOS |
| 电源电压 | 5 V |
| Operating Supply Range | 4.5 V to 5.5 V |
| 数据速率 | 120 kbps under load |
| Slew Rate | 10 V/µs |
| Protocol Compliance | EIA/TIA-232, RS-232F, and ITU V.28 |
| Charge-Pump Capacitor Value | 0.1 F |
| 工作温度 | 0 C to 70 C |
| 封装 | 16-pin SOIC |
| 安装类型 | Surface mount |
| ESD Protection | ±15 kV IEC 61000-4-2 and/or ±15 kV HBM |
| RoHS 状态 | RoHS compliant |
| Pin Compatibility | Pin-to-pin compatible with popular industry-standard pinouts |
SP232ACT-L 16-pin soic 引脚配置指南
SP232ACT-L（16-pin soic 封装）的引脚配置。 引脚编号、功能和连接图在制造商数据手册中定义。请参阅该手册以了解确切的封装尺寸和焊接指南。
暂无详细引脚数据： SP232ACT-L.
请参阅 数据手册 以查看完整引脚配置。
典型应用
SP232ACT-L 适用于 6 应用s: Industrial Serial Console, Data Acquisition Equipment, Test and Measurement Instruments, Embedded Control Interfaces, Legacy Peripheral Connectivity, Point-to-Point Communication Links.
Industrial Serial Console
The SP232ACT-L fits industrial serial consoles that require a dependable RS-232 endpoint on a 5 V logic board. Its 120 kbps under-load rate is more than adequate for terminal commands, configuration transfers, and status polling, while the single 4.5 V to 5.5 V supply avoids a separate negative rail. The 16-pin SOIC format supports compact board placement, and the cited ±15 kV ESD ratings help protect the connector-facing path. Designers should keep the charge-pump capacitors close to the device and provide a robust chassis or signal-ground return to reduce common-mode voltage.
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Data Acquisition Equipment
SP232ACT-L is appropriate for data-acquisition equipment that exchanges commands and sampled status with a host computer over RS-232. The 120 kbps under-load rate supports control traffic without approaching the limits of the physical interface, and the integrated two-driver, two-receiver arrangement permits bidirectional communication. Its BiCMOS design provides low-power operation from one +5 V supply, reducing the need for negative voltage generation at the system level. The interface remains limited to the specified 0 C to 70 C range, and cable capacitance, grounding, and the remote device’s threshold tolerances should be validated before long-distance deployment.
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Test and Measurement Instruments
The SP232ACT-L can serve as the RS-232 link in bench instruments, programmable supplies, and legacy test systems. A 120 kbps interface is useful for remote commands and measurement results, while the 16-pin SOIC package leaves more board area than a through-hole alternative. Its ±15 kV IEC 61000-4-2 and/or HBM ESD capability is valuable when the transceiver is exposed through an external connector. For reliable measurements, isolate the serial ground appropriately, avoid placing sensitive analog returns beneath the charge-pump area, and verify that the connected instrument uses compatible RS-232F or V.28 signaling.
推荐
Embedded Control Interfaces
SP232ACT-L provides a practical bridge between a 5 V embedded controller and an RS-232 peripheral. Its 120 kbps rate accommodates boot messages, register access, and supervisory commands, while two transmitters and two receivers support bidirectional point-to-point links. The integrated charge pump removes the need for an external negative supply, and 0.1 F ceramic capacitors simplify BOM selection. The interface should be placed near the serial connector so the protected transceiver side remains short, and system designers must account for the 0 C to 70 C commercial-temperature limit when using the part outside controlled environments.
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Legacy Peripheral Connectivity
The SP232ACT-L is useful when maintaining or updating equipment that still exposes RS-232 ports through a two-driver, two-receiver interface. Its industry-standard pin compatibility can reduce the effort needed to reproduce an established layout, and its 120 kbps rate closely matches legacy control protocols rather than demanding modern high-speed channels. The single +5 V operation is convenient for replacement boards that previously used CMOS-level serial drivers. Verify the exact pin labels, charge-pump capacitor network, and connector polarity against the manufacturer datasheet before populating the board because package similarity alone does not prove complete electrical interchangeability.
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Point-to-Point Communication Links
SP232ACT-L supports point-to-point RS-232 links between two circuit boards or between a controller and a serial peripheral. The 120 kbps under-load specification provides useful margin for command-oriented protocols, while the 10 V/µs slew rate helps preserve signal transitions through the driver stage. Its enhanced ESD capability is most valuable when a user-accessible connector is directly exposed. Layout should include a continuous ground reference, minimized stub lengths, and careful separation from switching supplies or high-current return paths, because those factors can degrade noise margin even when the nominal data-rate requirement is satisfied.
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推荐产品汇总
工程参考数据： SP232ACT-L ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | SP232EEN-L/TR |
|---|---|---|
| Brand | MaxLinear | MaxLinear |
| Package | 16-pin SOIC | 16-pin SOIC |
| Device Type | RS-232 transceiver | RS-232 transceiver |
关键差异点
- High-speed single-supply RS-232 operation （对比 MAX232CPE+)
- Surface-mount integration （对比 MAX232CPE+)
- Documented connector-facing ESD protection （对比 SP232EEN-L/TR)
设计说明
Place the four specified 0.1 F charge-pump capacitors close to their associated SP232ACT-L pins, with short and symmetric traces. The verified device information specifically supports operation with ceramic capacitors, but ESR, DC-bias characteristics, and effective capacitance still matter. Confirm the minimum effective capacitance across temperature and bias using the manufacturer guidance, and avoid routing the charge-pump current through the sensitive receive-return path.
Position the transceiver near the external RS-232 connector so the connector-facing traces remain short. Provide a continuous interface-ground return, connect cable shielding according to the system grounding strategy, and avoid long stubs or shared current paths with motors, relays, or switching power converters. The specified 120 kbps rate is not a guarantee that every long or poorly grounded cable will preserve signal integrity.
Do not treat MAX232CPE+ as a physical drop-in for the SP232ACT-L/TR SOIC board simply because MaxLinear lists the devices as functional equivalents. The MAX232CPE+ uses a through-hole DIP package in the cited ordering, while SP232ACT-L/TR is cataloged as a 16-SOIC. Also verify capacitor values, pin labels, temperature grade, and ESD requirements before substituting any part or approving a second-source BOM entry.
合规信息
RoHS-compliant status is stated in the verified component listing. REACH, lead-free, halogen-free, and conflict-minerals declarations were not supplied. AEC-Q100 is not applicable to the listed commercial RS-232 interface.