SP3232EHEA-L/TR - 460kbps RS-232 Transceiver | MaxLinear
料号： SP3232EHEA-L/TR ✗ 停产SP3232EHEA-L/TR 概述
An RS-232 transceiver is an interface IC that converts logic-level digital signals into RS-232 voltage levels and receives RS-232 signals back into logic-level outputs. It belongs to the serial-interface hierarchy, alongside UART controllers and isolation devices. This makes the SP3232EHEA-L/TR suitable for connecting a host, embedded controller, or industrial terminal to a legacy peripheral through a wired serial port.
Key features include true EIA/TIA-232-F operation from a supply as low as +2.7V, interoperability with RS-232 equipment powered from +2.7V, a 460kbps maximum data rate, and 300mV receiver hysteresis. The charge-pump architecture requires only 0.1uF capacitors during 3.3V operation, reducing external component count in portable designs while preserving standard RS-232 signal levels.
Internally, the dual-driver and dual-receiver arrangement supports two independent communication channels in full-duplex operation. Receiver hysteresis improves noise immunity around the logic threshold, while the enhanced ESD rating adds protection for connector-adjacent circuitry. The single-supply charge-pump design allows operation from modern 3.3V system rails without a separate negative RS-232 supply.
Typical applications include point-of-sale terminals, portable data-collection equipment, industrial serial adapters, diagnostic interfaces, and battery-powered handheld computers. The 16-pin SSOP supports compact PCB layouts, while the 460kbps data rate accommodates legacy peripherals that require more speed than a conventional low-speed RS-232 link.
When laying out the circuit, place charge-pump capacitors and the interface-side protection network close to their associated pins, and route the RS-232 connector path away from sensitive digital and analog traces. Confirm signal polarity and connector pin assignment before PCB release because RS-232 uses inverted logic in many controller implementations.
This page combines the manufacturer's product information, exact-MPN distributor records, technical feature details, package information, practical design guidance, and same-family drop-in options. It is intended to help engineers identify the correct channel count, speed, supply range, package, and replacement path before committing a board layout.
直接替换替代料： SP3232EHEA-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： SP3232EHEA-L/TR （相同外形与封装尺寸） ——差异在于 Package, Maximum Data Rate, Operating Temperature, Mounting Type, Operating Supply Voltage.
SP3232EEA-L/TR
✅ 直接替换📋 参考替代料（不在目录中）
SP3232EEN-L/TR
✅ 直接替换 ⚠️ 规格未核验联系询价
查看数据手册 →SP3232EEY-L/TR
✅ 直接替换 ⚠️ 规格未核验联系询价
查看数据手册 →SP3232ECY-L/TR
✅ 直接替换 ⚠️ 规格未核验联系询价
查看数据手册 →SP3232ECA-L/TR
✅ 直接替换 ⚠️ 规格未核验联系询价
查看数据手册 →SP3232EHEA-L/TR 规格参数
| Number of Drivers | 2 |
| Number of Receivers | 2 |
| Transceiver Configuration | 2/2 full duplex |
| Protocol | RS-232 |
| Supply Voltage Range | 3V to 5.5V |
| Minimum Operating Supply | +2.7V |
| Maximum Data Rate | 460kbps |
| Receiver Hysteresis | 300mV |
| Charge-Pump Capacitor | 0.1uF at 3.3V operation |
| ESD Protection | +15kV human body model |
| Standards Compliance | EIA/TIA-232-F |
| 工作温度范围 | -40C to +85C |
| 封装 | 16-SSOP (0.209, 5.30mm width) |
| 安装类型 | Surface mount |
| Packaging | Tube |
| RoHS 状态 | Compliant |
| Product Type | RS-232 interface transceiver |
SP3232EHEA-L/TR 16-ssop (0.209, 5.30mm width) 引脚配置指南
SP3232EHEA-L/TR（16-ssop (0.209, 5.30mm width) 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： SP3232EHEA-L/TR.
请参阅 数据手册 以查看完整引脚配置。
典型应用
SP3232EHEA-L/TR 适用于 6 应用s: Portable Data Collectors, Point-of-Sale Terminals, Industrial Serial Adapters, Diagnostic and Service Interfaces, Battery-Powered Handheld Computers, Legacy Peripheral Connectivity.
Portable Data Collectors
The SP3232EHEA-L/TR fits portable data-collection equipment that communicates with legacy RS-232 peripherals through a wired service or docking interface. Its 3V to 5.5V operating range supports 3.3V handheld systems, while the 460kbps maximum rate provides useful throughput for configuration logs and transaction records. The two-driver, two-receiver arrangement can support full-duplex command and response traffic. Its +15kV human-body-model ESD rating is also relevant near an exposed connector, although the complete enclosure and cable path still need system-level protection.
推荐
Point-of-Sale Terminals
The SP3232EHEA-L/TR is suitable for point-of-sale equipment that must retain an RS-232 connection to printers, scales, or older service peripherals. Two transmitters and two receivers allow more than one directional signal path, and the 460kbps capability is useful for burst data transfer. The 16-SSOP package preserves board area in compact terminals, while the charge-pump supply needs only 0.1uF capacitors during 3.3V operation. Design the connector return path and logic reference carefully to prevent ground offsets from creating data errors.
推荐
Industrial Serial Adapters
The SP3232EHEA-L/TR can be used in industrial serial adapters that bridge modern logic to legacy RS-232 equipment. Its 460kbps data rate covers common service and control protocols, and its -40C to +85C operating range supports wider industrial temperature conditions than typical consumer interfaces. The 300mV receiver hysteresis helps distinguish valid signals amid noise. For installations with long cables or severe electrical transients, add appropriately designed protection and consider a differential RS-485 interface such as SP490EEN-L/TR instead of extending RS-232 beyond its intended cable environment.
推荐
Diagnostic and Service Interfaces
The SP3232EHEA-L/TR is appropriate for diagnostic equipment that accesses legacy equipment through a service port. Full-duplex operation allows command transmission and response reception through one 2/2 transceiver, while 460kbps can shorten service sessions when the connected device supports that rate. The single-supply charge-pump arrangement eliminates the need for a separate negative voltage source, simplifying portable service tools. Use controlled signal levels, a defined connector pinout, and firmware timeout handling because legacy devices may vary in logic polarity and handshake behavior.
推荐
Battery-Powered Handheld Computers
The SP3232EHEA-L/TR fits battery-powered handheld computers that retain an RS-232 connection for docking, programming, or legacy peripheral support. The device accepts a 3.3V system supply and its 3.3V charge-pump configuration requires only 0.1uF capacitors, reducing board area and external power complexity. Two drivers and two receivers provide a full-duplex interface when both sides transmit. Designers should still calculate the average and peak supply current in the complete handheld and enable the interface only when needed if the surrounding platform provides shutdown control.
推荐
Legacy Peripheral Connectivity
The SP3232EHEA-L/TR can bridge a modern microcontroller to legacy RS-232 printers, scales, meters, or programming fixtures. Its 460kbps rate accommodates common serial-control traffic, and the dual full-duplex configuration simplifies command-and-response protocols. The 16-SSOP package is suitable for compact interface cards, but the RS-232 pinout must match the connector rather than being assumed from a newer TTL serial standard. Where both devices share ground, verify that ground-potential differences remain below the receiver's tolerated range.
推荐
推荐产品汇总
工程参考数据： SP3232EHEA-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 | SP3232EEA-L/TR | SP3232EEN-L/TR | SP3232EEY-L/TR | SP3232ECY-L/TR | SP3232ECA-L/TR |
|---|---|---|---|---|---|---|
| Brand | MaxLinear | MaxLinear | MaxLinear | MaxLinear | MaxLinear | MaxLinear |
| Package | SSOP-16 | SSOP-16 | SSOP-16 | SSOP-16 | SSOP-16 | SSOP-16 |
关键差异点
- Documented enhanced ESD capability （对比 SP3232EEA-L/TR)
- Full 2/2 channel configuration （对比 SP3232ECY-L/TR)
- 460kbps maximum data rate （对比 SP3232EEN-L/TR)
- Compact low-voltage charge-pump implementation （对比 SP3232EEY-L/TR)
设计说明
Place the 0.1uF charge-pump capacitors directly between their designated IC pins with the shortest possible traces. Keep the charge-pump loop compact, use a solid ground reference, and avoid routing it beneath analog or high-speed digital sections. The SSOP footprint is small enough that pin escapes and capacitor orientation can dominate loop inductance, so follow the pin-description table and recommended capacitor layout in the manufacturer datasheet.
Keep RS-232 driver and receiver nets away from clocks, ADC inputs, switching-regulator nodes, and other sensitive analog signals. RS-232 uses large bipolar voltage swings relative to logic levels, so even a short parallel run can create coupling. Maintain a continuous ground reference beneath the interface where practical, and use a proper connector shield and chassis-ground strategy when the cable is external to the enclosure.
Do not assume every SP3232E order code has the same H, EA, or suffix-specific behavior. The target's obsolete status also makes it important to distinguish an exact replacement from a merely related family member. Before substitution, compare channel count, enable or shutdown behavior, charge-pump connections, temperature grade, ESD rating, data rate, package dimensions, and tape orientation. A footprint match alone does not guarantee electrical drop-in compatibility.
RS-232 driver transitions can radiate onto adjacent PCB traces or cables. Route each driver output directly toward its connector with minimal stubs, place optional series damping near the source if ringing appears, and keep the return path available. If the interface shares a board with switching converters, use separate return-current paths and evaluate additional filtering or isolation rather than relying only on software timing margin.
合规信息
RoHS compliance is stated for the exact MPN in an indexed product record. No explicit REACH, lead-free, halogen-free, or conflict-minerals statement was established for the exact suffix.
