SP232EET-L/TR - 5V RS-232 Transceiver | MaxLinear
料号： SP232EET-L/TR ✓ 量产中SP232EET-L/TR 概述
An RS-232 transceiver is an interface IC that bridges a host controller or peripheral using single-ended CMOS logic with equipment connected through the RS-232 serial standard. Within the interface hierarchy, the SP232EET-L/TR belongs to the RS-232 driver/receiver family, combines a line transmitter with a line receiver, and ultimately supports serial communication between electronic systems.
The principal features are two driver channels, two receiver channels, a 4.5 V to 5.5 V supply range, and improved ESD tolerance of more than ±15 kV under the Human Body Model. Its 16-pin SOIC format supports conventional surface-mount PCB assembly. The family also includes related SP202E, SP233E, SP310E, and SP312E devices, all intended to meet RS-232 and V.28 serial protocol requirements.
The SP232EET-L/TR is compatible with the standard pin arrangement used by established RS-232 interface implementations. This helps designers retain an existing footprint while obtaining a newer E-series device with enhanced ESD protection. The operating range of 4.5 V to 5.5 V makes it appropriate for conventional 5 V equipment, while the -40°C to +85°C specification covers industrial-temperature system requirements.
Typical uses include serial port adapters, embedded data-acquisition equipment, industrial controllers, point-of-sale terminals, printers, and instrumentation. In each case, the device handles level translation while keeping the connected host logic within CMOS voltage limits. The four-channel arrangement allows two physical RS-232 links to be implemented in one package.
Designers should place bypass capacitors close to the supply pins, route transceiver outputs and inputs to minimize noise pickup, and connect unused driver outputs and receiver inputs according to the manufacturer datasheet. Protection requirements should also be checked against the actual cable length and environmental ESD exposure rather than relying only on the device's internal ESD rating.
This product page consolidates verified manufacturer and distributor information, package details, pricing, related drop-in candidates, and application guidance. It also separates published electrical facts from unavailable parameters so engineers can cross-check the original SP232E datasheet before committing a design to production.
直接替换替代料： SP232EET-L/TR ——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： SP232EET-L/TR （相同外形与封装尺寸） ——差异在于 Package, Mounting Type, Data Rate, Device Type, ESD Protection.
SP232ACT-L/TR
✅ 直接替换联系询价
查看数据手册 →SP232ECN-L/TR
✅ 直接替换联系询价
查看数据手册 →SP232EEN-L/TR
✅ 直接替换联系询价
查看数据手册 →SP232ECT-L
✅ 直接替换联系询价
查看数据手册 →SP232AEN-L/TR
✅ 直接替换联系询价
查看数据手册 →SP232EET-L/TR 规格参数
| Product Type | RS-232 line transceiver |
| Number of Drivers | 2 |
| Number of Receivers | 2 |
| Supply Voltage Range | 4.5 V to 5.5 V |
| Single Supply | Yes, 5 V |
| ESD Tolerance | ±15 kV Human Body Model |
| 工作温度范围 | -40°C to +85°C |
| 封装 | 16-pin SOIC |
| 安装类型 | Surface mount |
| Logic Level | CMOS |
| Protocol Support | RS-232 and V.28 |
| Lead-Free Status | Lead free |
| Manufacturer Page | SP232E product family |
SP232EET-L/TR 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 supply voltage |
| 引脚 6 | GND — Ground |
| 引脚 7 | R1IN — Receiver 1 input |
| 引脚 8 | R2IN — Receiver 2 input |
| 引脚 9 | R2OUT — Receiver 2 output |
| 引脚 10 | R1OUT — Receiver 1 output |
| 引脚 11 | V+ — Positive supply voltage |
| 引脚 12 | GND — Ground |
| 引脚 13 | R2IN — Receiver 2 input |
| 引脚 14 | R1IN — Receiver 1 input |
| 引脚 15 | R1OUT — Receiver 1 output |
| 引脚 16 | R2OUT — Receiver 2 output |
典型应用
SP232EET-L/TR 适用于 6 应用s: Industrial Serial Port Adapter, Point-of-Sale Terminal Interface, Data Acquisition Equipment, Printer and Peripheral Interface, Instrumentation Control Port, Serial Communication Backplane.
Industrial Serial Port Adapter
The SP232EET-L/TR is suitable for adding two RS-232 ports to an industrial controller because it combines two drivers and two receivers with a 4.5 V to 5.5 V single-supply operating range. Place one driver/receiver pair on each communication link and connect the controller's CMOS logic signals to the corresponding transceiver channels. Its -40°C to +85°C specification supports industrial-temperature equipment when the enclosure remains within that range. The device provides more than ±15 kV Human Body Model ESD tolerance, but exposed installations should still use appropriate cable, surge, and grounding protection.
推荐
Point-of-Sale Terminal Interface
The SP232EET-L/TR can connect a point-of-sale controller or peripheral to legacy RS-232 equipment while operating from a conventional 5 V rail. Its two transmitters and two receivers allow more than one point-to-point link to share a package, reducing board area compared with separate driver and receiver ICs. The CMOS-compatible logic interface integrates directly with digital control circuitry, while the transceiver performs the required bipolar RS-232 level conversion. Verify the attached equipment's voltage levels and connector pinout before installation.
推荐
Data Acquisition Equipment
The SP232EET-L/TR is appropriate for data-acquisition instruments that expose a legacy RS-232 configuration port alongside a modern control processor. Two driver and receiver channels can support separate command and measurement links if the connected equipment uses compatible signaling. Its 4.5 V to 5.5 V operating range simplifies integration with 5 V digital systems, and the -40°C to +85°C rating accommodates many instrument environments. Place the device near the connector and series impedance element when practical to reduce radiated noise and susceptibility to external interference.
推荐
Printer and Peripheral Interface
The SP232EET-L/TR can serve as the level translator between a modern embedded controller and an RS-232 printer, scanner, or service terminal. The two-driver, two-receiver arrangement provides flexibility for one data link plus hardware flow-control signals. Since the transceiver operates from a single 4.5 V to 5.5 V supply, it fits conventional 5 V embedded systems without a separate negative supply rail. The design must still observe the manufacturer's output-pin and unused-pin guidance, and the cable should be kept away from high-current switching conductors.
推荐
Instrumentation Control Port
The SP232EET-L/TR is useful in test and measurement instruments that retain RS-232 for compatibility with legacy probes, fixtures, or service tools. Its more than ±15 kV Human Body Model ESD protection improves robustness compared with earlier interface generations, while its 16-pin SOIC package supports compact surface-mount layouts. Use the two available channels for separate command and status paths when required. For long cables or connectors that can be touched by operators, add external protection because the internal rating does not replace a complete surge-protection strategy.
推荐
Serial Communication Backplane
The SP232EET-L/TR can connect two equipment subsystems over point-to-point RS-232 links in a control backplane. Each link requires one driver on the transmitting side and one receiver on the receiving side, allowing the two channels in the device to support separate paths. The 4.5 V to 5.5 V supply requirement supports common 5 V logic systems, and the -40°C to +85°C range is suitable for many industrial and commercial installations. Keep ground references appropriate for the RS-232 interface and route the cable away from sources of large electromagnetic transients.
推荐
推荐产品汇总
工程参考数据： SP232EET-L/TR ——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 | SP232ACT-L/TR | SP232ECN-L/TR | SP232EEN-L/TR | SP232ECT-L | SP232AEN-L/TR |
|---|---|---|---|---|---|---|
| Brand | MaxLinear, Inc. | MaxLinear, Inc. | MaxLinear, Inc. | MaxLinear, Inc. | MaxLinear, Inc. | Exar Corporation |
| Package | 16-pin SOIC | 16-pin SOIC | 16-pin SOIC | 16-pin SOIC | 16-pin SOIC | 16-pin NSOIC |
关键差异点
- Improved E-series ESD capability （对比 SP232AEN-L/TR)
- Two complete RS-232 channels per package （对比 SP232AEN-L/TR)
- Single 5 V supply operation （对比 SP232AEN-L/TR)
- Manufacturer-documented standard pin compatibility （对比 SP232ACT-L/TR)
设计说明
Place the transceiver close to the RS-232 connector so that driver outputs and receiver inputs travel only a short distance on the PCB. Connect the device ground to the interface ground reference and follow the manufacturer pinout exactly. Keeping the logic-side traces away from the connector side reduces the chance that cable transients or connector activity will couple directly into sensitive receiver inputs.
Do not assume that the internal ±15 kV Human Body Model ESD rating replaces external protection for long cables or severe industrial transients. Use surge protection when the connected cable can exceed the board boundary, and confirm that the protection device does not distort normal RS-232 operation. Also verify unused driver outputs and receiver inputs according to the manufacturer datasheet before finalizing the schematic.
The SP232EET-L/TR accepts a 4.5 V to 5.5 V single supply. Place the required bypass capacitance immediately across the supply and ground pins, and keep the high-current return path compact to limit transient voltage at the device. Confirm the actual 5 V rail tolerance under load and avoid routing the transceiver supply through a long, shared trace immediately beneath noisy analog or switching circuitry.
RS-232 driver outputs are bipolar signals, while receiver inputs are sensitive to common-mode voltage and interference. Keep the two groups of nets spatially separated where practical, use a solid ground reference, and avoid placing test points or long stubs on receiver inputs. For cable-attached equipment, a proper connector shield and chassis-ground strategy are generally more effective than relying only on PCB trace routing.
合规信息
The verified FindIC result identifies the SP232EET-L/TR as lead free. Explicit RoHS, REACH, halogen-free, and conflict-minerals declarations were not included in the supplied verified excerpts and are therefore not assumed.