SP3232EEP-L - Dual RS-232 Transceiver | MaxLinear
料号： SP3232EEP-L ✓ 量产中SP3232EEP-L 概述
An RS-232 transceiver is an interface IC that converts between single-ended logic-level signals and the bipolar voltage levels defined by the RS-232 standard. The transmitter raises and inverts data signals for transmission, while the receiver converts incoming bipolar signals into CMOS-compatible logic. A dual-transceiver device provides two independent communication paths and is commonly used in console ports, data acquisition equipment, instrumentation, and embedded control systems.
The SP3232E family uses an on-chip charge-pump supply and associated external capacitors to generate the positive and negative voltages required for true RS-232 operation. MaxLinear states that the SP3232E charge pump can operate with only 0.1 uF capacitors in 3.3 V systems. This capacitor requirement helps reduce board area while preserving the voltage levels needed by RS-232 receivers and drivers.
The SP3232EEP-L combines the electrical functions of two RS-232 transmitters and two RS-232 receivers in one device. Its 16-pin PDIP format is suitable for conventional through-hole assembly, prototyping, repair work, and industrial or legacy control equipment. Because the package uses through-hole leads, it also provides generous mechanical spacing and is generally easier to inspect or rework than a fine-pitch surface-mount package.
Typical applications include RS-232 console connections, laboratory and test equipment, industrial controller interfaces, configuration ports, and embedded systems that communicate with older peripherals. The two-driver, two-receiver organization allows simultaneous transmit and receive activity on each channel where the connected equipment supports full-duplex RS-232 communication.
Design the charge-pump capacitor network with the values and layout specified in the manufacturer datasheet. Keep the transceiver close to the connector, provide a common ground path between the systems, route the differential charge-pump capacitor connections away from sensitive analog circuitry, and confirm that the selected connector and cable satisfy the intended RS-232 application.
This product page combines the device architecture, package information, application guidance, sourcing workflow, and a structured list of datasheet and cross-reference resources. It also distinguishes confirmed drop-in substitutions from candidates that require pinout, package, and electrical verification before being used in a replacement design.
直接替换替代料： SP3232EEP-L ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
该产品暂无直接替换替代料。
请求替代料SP3232EEP-L 规格参数
| Transceiver Configuration | 2 transmitters / 2 receivers |
| Interface Standard | RS-232 |
| Operating Supply Range | 3.3 V to 5.5 V |
| 封装 | 16-PDIP |
| 安装类型 | Through-hole |
| Signal Direction | Full-duplex |
| Charge-Pump Capacitance | 0.1 uF in 3.3 V operation |
| ESD Protection | Enabled |
| Power-Supply Topology | Single supply |
| 引脚数 | 16 pins |
| Driver Count | 2 drivers |
| Receiver Count | 2 receivers |
SP3232EEP-L 引脚配置
| 引脚 1 | R1OUT — Receiver 1 output |
| 引脚 2 | R2OUT — Receiver 2 output |
| 引脚 3 | R2IN — Receiver 2 input |
| 引脚 4 | R1IN — Receiver 1 input |
| 引脚 5 | V+ — Positive charge-pump output |
| 引脚 6 | C1+ — Charge-pump flyback capacitor positive terminal |
| 引脚 7 | C1- — Charge-pump flyback capacitor negative terminal |
| 引脚 8 | C2+ — Charge-pump capacitor positive terminal |
| 引脚 9 | C2- — Charge-pump capacitor negative terminal |
| 引脚 10 | V- — Negative charge-pump output |
| 引脚 11 | T1IN — Driver 1 input |
| 引脚 12 | T2IN — Driver 2 input |
| 引脚 13 | T2OUT — Driver 2 output |
| 引脚 14 | T1OUT — Driver 1 output |
| 引脚 15 | GND — Ground |
| 引脚 16 | VCC — Positive power supply |
典型应用
SP3232EEP-L 适用于 6 应用s: RS-232 Console Interface, Industrial Controller Communication, Laboratory Test Equipment, Embedded Data Acquisition, Portable Instrument Connection, Legacy Peripheral Upgrade.
RS-232 Console Interface
The SP3232EEP-L is well suited to an RS-232 console port because it combines two transmitters and two receivers with operation from a single 3.3 V to 5.5 V supply. Place the device between the host logic and a DB9 or other serial connector, using one driver and one receiver for each direction of a full-duplex link. Its charge-pump architecture can use 0.1 uF capacitors in a 3.3 V system, reducing support-component area. The 16-PDIP package also simplifies through-hole assembly and field rework. The connector must still provide the correct signal and ground assignments, and the PCB layout should keep charge-pump traces away from sensitive logic lines.
Industrial Controller Communication
The SP3232EEP-L provides the bipolar signal interface required between a low-voltage controller and an RS-232 industrial peripheral. Its two-driver, two-receiver organization supports two full-duplex RS-232 links when the connected equipment provides the appropriate signals. Operating from 3.3 V to 5.5 V permits integration with both 3.3 V and 5 V system rails. Because the device is packaged for through-hole mounting, it is particularly practical for controllers assembled on larger control boards or serviced through conventional soldering equipment. Protection requirements for industrial cables should be handled separately from the transceiver’s internal ESD function.
Laboratory Test Equipment
The SP3232EEP-L can bridge test-equipment control logic with legacy RS-232 instruments that require true bipolar levels. Two receivers allow the controller to monitor two channels, while two drivers support command transmission and stimulus control. The single 3.3 V to 5.5 V supply reduces the number of rails required in portable or bench instruments, and the 0.1 uF charge-pump capacitor option supports compact implementation. For laboratory use, follow the datasheet capacitor values and place protection components at the connector where cables enter the enclosure. Verify that the selected connector pins and signal direction match the instrument’s RS-232 implementation.
Embedded Data Acquisition
The SP3232EEP-L can connect an embedded controller to a data-acquisition instrument, sensor interface, or service port that uses RS-232. The dual-channel arrangement supports simultaneous control and monitoring when the remote equipment uses separate transmit and receive conductors. Running from a 3.3 V supply is useful for compact embedded systems, while the efficient charge-pump design can reduce external capacitor size. The 16-PDIP package is appropriate where through-hole assembly is preferred or where the assembled board is intended for serviceable industrial equipment. Route the interface near its connector, maintain a short return path, and apply the instrument-specific protection scheme before the connector pins.
Portable Instrument Connection
The SP3232EEP-L supports RS-232 connectivity in portable and hand-held equipment because the SP3232E family operates from a single 3.3 V to 5.5 V source. Its charge-pump supply can use 0.1 uF capacitors in 3.3 V operation, helping constrain board area in compact products. Two drivers and two receivers allow one port to handle command transmission and status monitoring. The PDIP package is appropriate for equipment assembled with through-hole techniques or designed for straightforward repair. Designers should still account for connector clearance, cable strain relief, ESD protection, and the power-consumption contribution of the interface whenever the complete device must meet a stringent battery-life target.
Legacy Peripheral Upgrade
The SP3232EEP-L can serve as the RS-232 interface in a new controller designed to communicate with older peripherals that do not support logic-level serial signals. The device generates true RS-232 levels from a 3.3 V or 5 V system supply and provides two transmit and two receive channels for flexible equipment integration. Its through-hole 16-PDIP package is useful in control systems where replacing a surface-mount transceiver would require substantial PCB rework. Confirm the old peripheral’s pinout, handshake requirements, and signal polarity before finalizing the design, since connector assignments and protocol behavior vary between equipment. Add external surge protection when the RS-232 cable leaves the enclosure.
工程参考数据： SP3232EEP-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 |
|---|---|
| Package | 16-PDIP |
| Brand | MaxLinear |
| Transceiver Configuration | 2 transmitters / 2 receivers |
| Operating Supply Range | 3.3 V to 5.5 V |
| Interface Standard | RS-232 |
| Charge-Pump Capacitance | 0.1 uF in 3.3 V operation |
| Mounting Type | Through-hole |
| ESD Protection | Enabled |
| Pin Count | 16 pins |
关键差异点
- Single 3.3 V supply operation with compact charge-pump support （对比 Generic 5 V-only RS-232 transceivers)
- Integrated full-duplex channel count （对比 Single-channel RS-232 transceivers)
- Serviceable through-hole package （对比 Surface-mount RS-232 transceivers)
设计说明
Place the SP3232EEP-L near the RS-232 connector and connect each receiver and driver to the corresponding connector pins with short traces. Follow the manufacturer datasheet for the C1 and C2 charge-pump capacitor placement, use the specified capacitor values, and provide a low-impedance ground connection. Keep the connector-side interface path physically separated from sensitive analog or high-speed digital traces where practical.
Do not substitute a logic-level serial transceiver for the SP3232EEP-L without redesigning the interface. Its internal charge pump generates the bipolar voltages required by true RS-232, and an incorrect V+ or V- connection can damage the device. Also verify whether the connected equipment uses full RS-232 signal levels or a shortened RS-232 arrangement before adding external protection components.
Keep the charge-pump capacitor loop compact and away from receiver inputs and sensitive signal traces. Route the shared ground between the transceiver and connector without long shared segments, and place any connector protection at the board edge. This arrangement reduces the chance that switching activity from the charge pump or externally coupled cable noise will degrade the receiver margin.
合规信息
The available manufacturer and distributor information does not state the requested environmental or material-compliance statuses. AEC-Q100 qualification is not applicable because the SP3232EEP-L is an RS-232 interface IC rather than an automotive-grade component.
