SP232AEN-L/TR - 120kbps Dual RS-232 Transceiver | MaxLinear
料号： SP232AEN-L/TR ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $0.3941 | $0.39 |
| 10 | $0.3941 | $3.94 |
| 100 | $0.3941 | $39.41 |
| 500 | $0.3941 | $197.05 |
| 1,000 | $0.3941 | $394.10 |
SP232AEN-L/TR 概述
An RS-232 transceiver is a signal-interface semiconductor that converts logic-level UART signals into RS-232 voltage levels and converts received RS-232 levels back into logic-compatible signals. The SP232A belongs to the broader hierarchy of interface ICs, serial-interface transceivers, communication transceivers, and semiconductors. It is used where a host, controller, terminal, or embedded system must connect to a longer-distance, noise-tolerant RS-232 port.
Key features include two driver and two receiver channels, compatibility with RS-232 and V.28 protocols, a 120 kbps data rate under load, and pin-to-pin compatibility with popular industry-standard pinouts. The manufacturer datasheet identifies small 0.1 µF ceramic charge-pump capacitors as a key implementation detail. The single 5 V supply and industrial temperature range support equipment operating across industrial and commercial environments.
The BiCMOS architecture combines bipolar and CMOS characteristics in the driver and receiver circuitry. This is relevant when designing a UART link because the interface must translate between low-voltage digital logic and the larger voltage swings defined by RS-232 while maintaining receiver discrimination under cable noise. The SP232A is intended for point-to-point serial communication rather than multidrop RS-485 networks.
Typical applications include industrial serial consoles, programmable-logic-controller service ports, test instrumentation, point-of-sale equipment, barcode-scanner interfaces, and embedded UART-to-RS-232 adapters. In each case, the transceiver is placed between the UART controller and the external DB9 or other RS-232 connector, with the charge-pump capacitors and bypass capacitor placed close to the device.
For a new PCB, follow the manufacturer datasheet for the charge-pump capacitor connection, ground-return arrangement, and decoupling placement. Keep the connector-side interface trace short, provide a solid ground reference, and confirm the downstream UART baud rate and cable length. The SP232AEN-L/TR is not an RS-485 transceiver, so it should not be used where multi-drop bus arbitration and differential signaling are required.
This page combines verified distributor listings, the MaxLinear SP232A datasheet, package information, application context, and a constrained drop-in replacement review. The listed alternatives are included only where the available cross-reference evidence identifies compatible package-level substitutions; engineers should still verify speed, ESD, supply, and lifecycle requirements before production use.
直接替换替代料： SP232AEN-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： SP232AEN-L/TR （相同外形与封装尺寸） ——差异在于 Supply Voltage, Package, ESD Protection.
快速对比工具——选择替代料号进行并排对比：
SP232AEN-L
✅ 直接替换✓ 有现货
联系询价
查看数据手册 →SP232AEN-L/TR 规格参数
| Device Type | Dual RS-232 line driver and receiver transceiver |
| Protocol | RS-232 and V.28 |
| 数据速率 | 120 kbps under load |
| 电源电压 | 4.5 V to 5.5 V |
| Supply Type | Single supply |
| Maximum Supply Current | 5 mA |
| 工作温度 | -40°C to +85°C |
| Driver/Receiver Channels | 2/2 |
| Charge Pump Capacitors | 0.1 µF ceramic |
| Architecture | BiCMOS |
| 封装 | 16-lead SOIC |
| 安装类型 | Surface mount |
| ESD Rating | 2 kV |
| RoHS | unknown |
| REACH | unknown |
| AEC-Q100 | not_applicable |
SP232AEN-L/TR 引脚配置
| 引脚 1 | C1+ — Charge-pump capacitor positive terminal |
| 引脚 2 | C1- — Charge-pump capacitor negative terminal |
| 引脚 3 | V+ — Positive supply terminal |
| 引脚 4 | R1OUT — Receiver output for channel 1 |
| 引脚 5 | R1IN — Receiver input for channel 1 |
| 引脚 6 | T1IN — Driver input for channel 1 |
| 引脚 7 | T1OUT — Driver output for channel 1 |
| 引脚 8 | GND — Ground reference |
| 引脚 9 | T2OUT — Driver output for channel 2 |
| 引脚 10 | T2IN — Driver input for channel 2 |
| 引脚 11 | R2IN — Receiver input for channel 2 |
| 引脚 12 | R2OUT — Receiver output for channel 2 |
| 引脚 13 | V- — Negative charge-pump supply terminal |
| 引脚 14 | C2+ — Charge-pump capacitor positive terminal |
| 引脚 15 | C2- — Charge-pump capacitor negative terminal |
| 引脚 16 | VCC — Positive supply input |
典型应用
SP232AEN-L/TR 适用于 6 应用s: Industrial UART Serial Console, Programmable Logic Controller Service Port, Test and Measurement Instrument, Point-of-Sale Terminal Interface, Embedded Data Acquisition Module, Modem and Remote Communications Link.
Industrial UART Serial Console
The SP232AEN-L/TR fits an industrial UART-to-RS-232 console when the controller operates from a single 5 V supply and the cable must carry the longer-range RS-232 voltage levels. Place the dual transceiver between the controller UART and the DB9 or terminal connector, and use the specified 0.1 µF ceramic charge-pump capacitors close to the IC. Its 120 kbps-under-load capability is suitable for service ports, configuration links, and diagnostic channels, while the -40°C to +85°C range supports equipment beyond room temperature. Confirm connector-level ESD protection and ground-return continuity because those requirements are set by the external cable and enclosure, not only by the IC.
推荐
Programmable Logic Controller Service Port
Use the SP232AEN-L/TR as the electrical interface between a PLC’s logic-level UART and an RS-232 maintenance connector. The dual driver and dual receiver arrangement supports the transmit and receive directions required by a serial service port, and the single 4.5 V to 5.5 V supply simplifies integration with 5 V control electronics. The 120 kbps-under-load rating provides margin above many low-speed configuration protocols, but the actual baud rate must be checked against cable length and receiver timing. Follow the datasheet charge-pump capacitor placement and provide a low-impedance ground return to reduce susceptibility to common-mode noise.
推荐
Test and Measurement Instrument
The SP232AEN-L/TR can provide the RS-232 port used by test instruments, calibration tools, and laboratory equipment that exchange commands with a PC or controller. Its 2/2 channel arrangement allows bidirectional serial communication without two separate interface packages, while the 16-SOIC format supports conventional surface-mount assembly. The 120 kbps-under-load specification is adequate for many instrument-control protocols, but cable shielding, grounding, and connector shielding remain important in electrically noisy benches. Confirm the instrument’s logic levels and RS-232 polarity in software or hardware before production use.
推荐
Point-of-Sale Terminal Interface
SP232AEN-L/TR is suitable for point-of-sale peripherals that use a host UART and an RS-232 receipt printer, scanner, or customer-display interface. The single 5 V-class supply aligns with common embedded logic systems, while the dual transceiver channels support bidirectional command and status traffic. The device’s 120 kbps-under-load capability is more than adequate for typical peripheral traffic, subject to the protocol and cable length. Keep the connector-side traces short, route the return path with the signal, and add external protection if the cable leaves an industrial enclosure or connects to user-accessible equipment.
推荐
Embedded Data Acquisition Module
The SP232AEN-L/TR can bridge a low-voltage embedded controller to an RS-232 data-acquisition device, modem, or remote sensor interface. Its -40°C to +85°C specification supports industrial enclosure environments, and the 2/2 architecture avoids separate logic-level-to-RS-232 conversion blocks for each direction. The 120 kbps-under-load rating supports many telemetry formats, but designers must calculate the complete link budget and observe UART oversampling requirements at the selected baud rate. Use the manufacturer’s charge-pump capacitor values and place common-mode or ESD protection at the connector boundary when cables leave the board.
推荐
Modem and Remote Communications Link
The SP232AEN-L/TR is appropriate for legacy modem, remote-maintenance, and equipment-to-host RS-232 links where a modern UART replaces older serial hardware. The single-supply 4.5 V to 5.5 V operating range and 120 kbps-under-load capability provide a straightforward interface for low- and moderate-speed serial protocols. Because RS-232 is a point-to-point, single-ended interface, cable length, ground continuity, and connector pinout must be checked carefully. External surge or ESD protection should be selected for exposed cables, and the transceiver should not be replaced by an RS-485 part without changing the system’s signaling architecture.
推荐
推荐产品汇总
工程参考数据： SP232AEN-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 | SP232AEN-L |
|---|---|---|
| Package | 16-SOIC | 16-SOIC |
| Brand | MaxLinear | MaxLinear |
| Device Type | Dual RS-232 transceiver | Dual RS-232 transceiver |
| Supply Voltage | 4.5 V to 5.5 V | 4.5 V to 5.5 V |
| Temperature Range | -40°C to +85°C | -40°C to +85°C |
| ESD | 2 kV | 2 kV |
| Architecture | BiCMOS | BiCMOS |
关键差异点
- Single-supply RS-232 interface with integrated charge-pump support （对比 SP232AEN-L)
- Verified 120 kbps-under-load capability （对比 SP232AEN-L)
- Industrial temperature capability （对比 SP232AEN-L)
设计说明
Use the manufacturer-specified 0.1 µF ceramic charge-pump capacitors for the SP232AEN and a local supply bypass capacitor close to VCC. Keep the charge-pump loop compact because long traces increase loop area and can reduce effectiveness of the internal charge pump. The verified 4.5 V to 5.5 V supply range should be checked against the actual rail tolerance and startup sequence.
Place the RS-232 connector-side driver and receiver pins away from noisy clocks, switching inductors, and high-current return paths. Route the interface as a pair with an uninterrupted ground return, and keep the external protection components close to the connector. The SP232AEN-L/TR is a single-ended RS-232 device, so ground integrity is part of signal integrity rather than an optional layout detail.
Do not substitute an RS-485 transceiver solely because it also uses a 2/2 driver-receiver arrangement. RS-232 and RS-485 use different voltage polarity, topology, termination, and multidrop behavior. Also verify the exact MPN suffix and package pinout before assembly, because the supplied cross-reference evidence confirms only the SP232AEN-L family relationship and does not establish a broad cross-brand replacement list.
合规信息
The supplied distributor and manufacturer results do not explicitly state RoHS, REACH, lead-free, halogen-free, or conflict-minerals status. AEC-Q100 is marked not applicable because this is an RS-232 interface IC rather than an automotive-qualified device in the provided data.
