SP3232ECA-L - 120kbps RS-232 Transceiver | MaxLinear
MPN： SP3232ECA-L ✓ 啟用中SP3232ECA-L 概覽
An RS-232 transceiver is an interface IC that converts between single-ended logic-level signals and differential bipolar RS-232 signals. Within the interface hierarchy, it belongs to the communications-interface class, connecting UART controllers, modems, test equipment, and industrial controllers to legacy or long-distance serial links. True RS-232 levels provide noise immunity and common-mode rejection that ordinary CMOS logic cannot supply directly.
The SP3232ECA-L supports true RS-232 operation from a single 3.0 V to 5.5 V supply, eliminating the negative supply normally required by older RS-232 implementations. Its 120 kbps minimum data rate under full load suits conventional UART traffic, while the integrated charge pump generates the required positive and negative voltage levels. Low-power shutdown is another documented feature of the related SP3232E series.
The SP3232E series uses an efficient charge-pump architecture rather than a switched-inductor supply. The manufacturer states that only 0.1 µF capacitors are required for 3.3 V operation. This topology reduces external magnetic-component requirements and avoids the inductor and associated EMI behavior common to conventional switching converters. The result is a compact interface solution intended for portable and handheld equipment.
Typical applications include notebook and palmtop computer serial ports, portable instrumentation, industrial control links, service equipment, and embedded systems that still use RS-232. Two transmitters and two receivers allow full-duplex communication when all four channel pins are used. The 16-pin SSOP package supports compact surface-mount layouts while remaining electrically compatible with the wider SP3232E transceiver family.
When designing around the SP3232ECA-L, verify that the UART signal levels and connector-side RS-232 levels are not tied together incorrectly, because the transceiver performs the voltage-domain conversion. Place charge-pump capacitors close to their designated pins, keep the serial route away from sensitive analog nodes, and confirm that the selected connector and ground strategy meet the requirements of the communication standard.
This page consolidates verified distributor specifications, family-level comparison data, lifecycle-independent engineering guidance, and practical interface design notes. It distinguishes confirmed SP3232ECA-L characteristics from parameters requiring confirmation in the manufacturer datasheet and separates documented alternatives from unverified cross-package substitutes.
直接替換替代品，適用於 SP3232ECA-L — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： SP3232ECA-L （相同外形與佔位） — 差異在於 Mounting Type, Data Rate, Operating Temperature, Package, Product Type.
SP3232ECA
✅ 直接替換📋 參考替代品（不在目錄中）
SP3232ECY-L
✅ 直接替換聯絡詢價
查看資料表 →SP3232EEA-L
✅ 直接替換聯絡詢價
查看資料表 →SP3232ECA-L 規格
| Product Type | RS-232 transceiver |
| Transceiver Configuration | 2/2 full-duplex |
| Number of Drivers | 2 |
| Number of Receivers | 2 |
| Minimum Data Rate Under Full Load | 120 kbps |
| 工作電源電壓 | 3.0 V to 5.5 V |
| 供應電流 | 1 mA |
| Charge-Pump Capacitance at 3.3 V | 0.1 µF |
| Low-Power Shutdown Supply Current | 1 µA with receivers active |
| 封裝 | 16-pin SSOP |
| Package Width | 5.30 mm |
| 安裝類型 | SMD |
| 工作溫度 | 0 °C to 70 °C |
| Duplex Type | Full duplex |
| Compliance Standard | EIA/TIA-232-F |
SP3232ECA-L 5.30 mm 腳位配置指南
SP3232ECA-L（5.30 mm 封裝）的腳位配置。 腳位編號、功能與連接圖定義於製造商資料手冊中。請參閱該手冊以取得確切的封裝尺寸與焊接指引。
無詳細腳位定義資料： SP3232ECA-L.
請參閱 資料表 以查看完整腳位配置。
典型應用
SP3232ECA-L 適用於 6 應用s: Portable Computer Serial Interface, Industrial Control Serial Link, Portable Test and Measurement Equipment, Embedded Debug and Service Console, Point-of-Sale and Peripheral Connectivity, Data Acquisition and Control Module.
Portable Computer Serial Interface
The MaxLinear SP3232ECA-L fits portable computers and handheld equipment that require a true RS-232 port from a single supply. Its 3.0 V to 5.5 V operating range allows operation from a 3.3 V system rail, and the integrated charge pump needs only 0.1 µF capacitors in 3.3 V operation. Two drivers and two receivers support full-duplex serial communication, while the 120 kbps rate is suitable for conventional UART peripherals. Placing the transceiver between the host UART and an RS-232 connector avoids a separate bipolar supply, reducing component count compared with older discrete charge-pump designs. The compact 16-pin SSOP also supports dense portable layouts, although engineers should preserve the required charge-pump capacitor placement and consult the official datasheet for the authoritative pin assignments.
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Industrial Control Serial Link
The SP3232ECA-L is useful when an industrial controller, service console, or programmable instrument must communicate with an RS-232 equipment port. The 120 kbps minimum rate under full load is appropriate for standard UART links, and the 3.0 V to 5.5 V supply range simplifies integration with embedded control hardware. True EIA/TIA-232-F operation provides the bipolar signaling expected by legacy RS-232 equipment rather than exposing unprotected logic levels directly to the connector. Because the specified operating temperature is 0 °C to 70 °C, the part is most appropriate for indoor commercial-temperature equipment unless a wider-rated alternative is selected. Firmware should still configure the UART baud rate, parity, and flow-control mode to match the connected peripheral, while the PCB must maintain adequate separation between RS-232 traces and sensitive control signals.
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Portable Test and Measurement Equipment
The SP3232ECA-L can connect a compact test instrument, debugger, or measurement controller to an RS-232 service interface without requiring a negative power rail. Its single 3.0 V to 5.5 V supply operation is valuable in handheld equipment where power budget and board area are constrained. The two-driver, two-receiver arrangement supports full-duplex command and response traffic, and the verified 120 kbps rate is sufficient for many legacy test protocols. The integrated charge-pump topology also avoids an external inductor, simplifying placement compared with conventional switching DC-DC solutions. Designers should use short charge-pump capacitor connections, provide a low-impedance ground reference, and use an appropriate protection scheme for cable-borne transient voltage. The complete pinout, capacitor values, and connector protection requirements must be taken from the official MaxLinear datasheet rather than inferred from the distributor summary.
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Embedded Debug and Service Console
The SP3232ECA-L provides a practical RS-232 isolation interface between a low-voltage embedded controller and an external service connector. A 3.3 V system can power the transceiver directly within its verified 3.0 V to 5.5 V range, while the charge-pump circuit produces the required positive and negative RS-232 voltages internally. At 120 kbps, it supports common bootloader, diagnostic, and configuration protocols commonly used with legacy embedded equipment. The two transmitters and two receivers permit full-duplex exchanges, although firmware must avoid driving an unused receiver path incorrectly or allowing a powered external node to contend with an output. For a service port, add the required connector protection and maintain a controlled ground strategy. Review the official pinout before assigning enable, shutdown, receiver, driver, and charge-pump capacitor connections.
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Point-of-Sale and Peripheral Connectivity
The SP3232ECA-L can serve as the RS-232 interface in point-of-sale terminals, label printers, scanners, and other peripheral equipment that retains a legacy serial port. Its 120 kbps full-load data rate supports conventional POS transaction and command traffic, while the single-supply operation reduces the need for a negative rail near the connector. The 16-pin SSOP package is convenient for compact peripheral boards, and the integrated charge pump avoids a discrete converter inductor. Signal-integrity planning is important even though the data rate is modest: route the bipolar RS-232 outputs away from clocks and display power converters, keep the ground reference continuous, and use appropriate transient protection at an accessible connector. The verified 0 °C to 70 °C rating suits typical indoor terminals, while severe industrial environments may require a component with documented extended-temperature capability.
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Data Acquisition and Control Module
The SP3232ECA-L is applicable to data-acquisition modules, laboratory controllers, and remote-control boards that exchange commands with a host over RS-232. Its 2/2 full-duplex arrangement allows simultaneous command transmission and response reception, while the 120 kbps rate aligns with many legacy supervisory protocols. Operating from 3.0 V to 5.5 V permits integration with either a 3.3 V control rail or a 5 V instrumentation subsystem, and the 0.1 µF charge-pump capacitors specified for 3.3 V operation help maintain a compact layout. The transmitter outputs require the correct RS-232 connector-side routing, while receiver inputs must be protected against off-domain or floating cable conditions. Use the manufacturer datasheet to confirm logic thresholds, shutdown behavior, and the exact capacitor connections, and avoid assuming that the SPI or I2C companion interface in the same acquisition module is an RS-232 replacement.
推薦
推薦產品摘要
工程參考資料，適用於 SP3232ECA-L — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | SP3232ECA | SP3232ECY-L | SP3232EEA-L |
|---|---|---|---|---|
| Package | 16-pin SSOP | 16-pin SSOP | 16-pin SSOP | 16-pin SSOP |
| Brand | MaxLinear | MaxLinear | MaxLinear | MaxLinear |
| Operating Supply Voltage | 3.0 V to 5.5 V | 3.0 V to 5.5 V | 3.0 V to 5.5 V | Secure voltage range up to 5.5 V |
| Transceiver Configuration | 2 drivers and 2 receivers | 2 drivers and 2 receivers | 2 drivers and 2 receivers | 2 drivers and 2 receivers |
| Duplex Type | Full duplex | Full duplex | Full duplex | Full duplex |
主要差異化特點
- Single-supply true RS-232 operation (對比SP3232ECA)
- Higher data-rate margin in the same documented package (對比SP3232ECY-L)
- Documented commercial-temperature operating range (對比SP3232EEA-L)
設計說明
Place the SP3232ECA-L charge-pump capacitors directly beside the pins identified in the official MaxLinear SP3232E datasheet. The manufacturer states that only 0.1 µF capacitors are required in 3.3 V operation, but placement still matters because the charge-pump nodes are high-frequency switching nodes. Keep the loop formed by the IC and capacitors compact, provide a nearby ground reference, and route those switching paths away from receiver inputs and sensitive analog traces.
Do not connect the RS-232 driver outputs directly to a logic-level UART because the SP3232ECA-L already performs the voltage-domain conversion. Likewise, do not bypass the transceiver with TTL-level wiring on a connector intended for true RS-232. Confirm the complete pin mapping, enable state, and charge-pump capacitor connections in the manufacturer datasheet; the supplied search excerpts establish the package and functions but do not provide an authoritative pin-number table.
Maintain a continuous ground reference between the transceiver and the RS-232 connector, and apply cable-side transient protection appropriate to the installation environment. Keep unprotected connector traces short and separated from clocks, ADC inputs, and switching-converter nodes. The bipolar RS-232 outputs should not be routed as ordinary low-voltage UART signals because their levels exceed the logic supply range, which can damage downstream circuitry if the transceiver is omitted or bypassed incorrectly.
合規資訊
The verified excerpts identify EIA/TIA-232-F compliance but do not provide explicit RoHS, REACH, lead-free, halogen-free, conflict-minerals, or AEC-Q100 declarations. AEC-Q100 is treated as not applicable because this is a commercial-temperature interface IC rather than an automotive-qualified device in the supplied data.