SP3232EHCA-L/TR - 3.3V 460kbps RS-232 Transceiver | MaxLinear
料号： SP3232EHCA-L/TR ✗ 停产SP3232EHCA-L/TR 概述
An RS-232 transceiver is an interface IC that converts logic-level signals between a digital system and the voltage-defined RS-232 port. The SP3232EH series belongs to the transceiver hierarchy within interface ICs, bridging embedded controllers, data-processing equipment, and legacy serial peripherals. Its two-driver, two-receiver arrangement supports full-duplex communication while keeping the external interface compact.
The main engineering features include a 460 kbps maximum data rate, operation across 3 V to 5.5 V, true EIA/TIA-232-F compliance, interoperability with RS-232 equipment operating from a 2.7 V supply, and enhanced 15 kV HBM ESD protection. The charge-pump supply architecture requires only 0.1 µF capacitors in 3.3 V operation, reducing external component count compared with implementations that need larger energy-storage capacitors.
Designed for portable and hand-held equipment, the SP3232EH combines four interface channels with low-voltage operation. Charge-pump circuitry generates the bipolar voltage levels required by RS-232 while the logic-side interface remains compatible with modern digital supply rails. Its 16-pin SSOP format supports compact layouts where a higher-pin-count package would be unnecessary.
Typical uses include notebook and palmtop computer serial ports, handheld instrumentation, point-of-sale equipment, industrial data acquisition, and embedded systems that retain an RS-232 connection. The 460 kbps capability is suitable for moderate-speed serial links, while 15 kV HBM protection improves interface robustness in exposed equipment.
When laying out the circuit, keep the charge-pump capacitors and RS-232 charge-pump nodes close to the device, preserve the datasheet-defined capacitor values, and route driver outputs and receiver inputs away from sensitive logic. Confirm that the selected cable and connector provide the intended ground reference and protection arrangement for the installation environment.
This product record combines electrical specifications, same-footprint family alternatives, application guidance, and design-focused considerations to support faster component selection, PCB planning, and RS-232 interface qualification.
直接替换替代料： SP3232EHCA-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： SP3232EHCA-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.
SP3232ECA-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 →SP3232EEY-L/TR
✅ 直接替换 ⚠️ 规格未核验联系询价
查看数据手册 →SP3232EEN-L/TR
✅ 直接替换 ⚠️ 规格未核验联系询价
查看数据手册 →SP3232EEA-L
✅ 直接替换联系询价
查看数据手册 →SP3238EEA-L/TR
✅ 直接替换📋 参考替代料（不在目录中）
SP3232EHCA-L/TR 规格参数
| Product Type | RS-232 transceiver |
| Number of Drivers | 2 |
| Number of Receivers | 2 |
| Transceiver Configuration | 2/2 full-duplex |
| Supply Voltage Range | 3 V to 5.5 V |
| Minimum Operating Supply | 2.7 V |
| Maximum Data Rate | 460 kbps |
| Protocol | RS-232 |
| Standards Compliance | True EIA/TIA-232-F |
| ESD Protection, Human Body Model | 15 kV |
| Charge-Pump Capacitor | 0.1 µF in 3.3 V operation |
| 封装 | 16-SSOP, 5.30 mm width |
| 安装类型 | Surface mount |
| Packaging | Tube |
SP3232EHCA-L/TR 16-ssop, 5.30 mm width 引脚配置指南
SP3232EHCA-L/TR（16-ssop, 5.30 mm 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： SP3232EHCA-L/TR.
请参阅 数据手册 以查看完整引脚配置。
典型应用
SP3232EHCA-L/TR 适用于 6 应用s: Portable Serial Communications, Notebook and Handheld Peripherals, Industrial Data Acquisition, Point-of-Sale Terminals, Embedded Test and Measurement, Legacy Equipment Maintenance.
Portable Serial Communications
The SP3232EHCA-L/TR fits portable equipment that must retain a true RS-232 port while operating from a 3.3 V system supply. Its two drivers and two receivers provide full-duplex connectivity, while the documented 460 kbps rate supports moderate-speed data links. The 0.1 µF charge-pump capacitors required in 3.3 V operation reduce board area, and 15 kV HBM ESD protection strengthens the connector-facing interface. In a handheld controller, the device can translate logic-level UART signals into RS-232 levels without requiring a separate 5 V supply.
推荐
Notebook and Handheld Peripherals
The SP3232EHCA-L/TR was developed for notebook, palmtop, and hand-held applications where a legacy serial connector must coexist with low-voltage digital electronics. The 2/2 channel arrangement connects two data directions, and the 3 V to 5.5 V range accommodates both 3.3 V and 5 V system rails. Its 16-SSOP package limits board area, while the 460 kbps data rate is appropriate for configuration ports, service interfaces, and peripheral synchronization rather than sustained high-bandwidth transfers.
推荐
Industrial Data Acquisition
The SP3232EHCA-L/TR can bridge a controller to legacy RS-232 test or data-acquisition equipment when the system already includes ESD-conscious cabling and grounding. The two-driver, two-receiver configuration supports simultaneous command and response paths, and 460 kbps operation is sufficient for many instrument-control protocols. Its 15 kV HBM protection improves robustness at an exposed connector, although industrial surge, ground-loop, and long-cable conditions still require system-level design review and suitable protection.
推荐
Point-of-Sale Terminals
The SP3232EHCA-L/TR suits point-of-sale terminals, receipt peripherals, and service equipment using RS-232 command links. It provides two transmit and two receive channels from a single 3.3 V or 5 V rail, eliminating a separate legacy interface supply in suitable designs. The 460 kbps rate supports transaction traffic and diagnostic protocols, while compact 16-SSOP construction preserves board area. Designers should preserve the manufacturer charge-pump layout and verify connector-level protection because internal HBM ratings do not replace cable or enclosure design.
推荐
Embedded Test and Measurement
The SP3232EHCA-L/TR is useful in embedded instrumentation that must communicate with a host through RS-232. The 2/2 transceiver arrangement allows separate transmit and receive paths, while 460 kbps operation covers many configuration, logging, and calibration streams. Operation from a 3 V to 5.5 V supply simplifies integration with low-voltage processors, and 0.1 µF charge-pump capacitors in 3.3 V mode reduce external component count. For bench-adjacent equipment, add appropriately selected external surge and cable protection based on the installation environment.
推荐
Legacy Equipment Maintenance
The SP3232EHCA-L/TR supports maintenance adapters that connect modern test computers or embedded controllers to legacy RS-232 equipment. Because the device is obsolete, engineers must carefully confirm the complete ordering suffix, pinout, operating grade, and lot traceability before release. Its established 2/2 RS-232 architecture and 16-SSOP footprint simplify repair-board replication when the manufacturer documentation confirms electrical equivalence. Production users should also evaluate an active lifecycle alternative to reduce sourcing risk.
推荐
推荐产品汇总
工程参考数据： SP3232EHCA-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 | SP3232ECA-L/TR | SP3232ECY-L/TR | SP3232EEY-L/TR | SP3232EEN-L/TR |
|---|---|---|---|---|---|
| Brand | MaxLinear | MaxLinear | MaxLinear | MaxLinear | MaxLinear |
| Package | 16-SSOP | 16-SSOP | 16-SSOP | 16-SSOP | 16-SSOP |
| Driver and Receiver Count | 2/2 | 2/2 | 2/2 | 2/2 | 2/2 |
| Interface Protocol | RS-232 | RS-232 | RS-232 | RS-232 | RS-232 |
| Ordering-Suffix Characteristics | EHCA ordering variant | ECA ordering variant | ECY ordering variant | EEY ordering variant | EEN ordering variant |
关键差异点
- Low-voltage RS-232 operation with a compact charge-pump network （对比 SP3232ECA-L/TR)
- Enhanced connector-side ESD rating （对比 SP3238EEA-L/TR)
- Full-duplex channel arrangement in a 16-SSOP footprint （对比 SP232AET-L/TR)
设计说明
Place the manufacturer-recommended charge-pump capacitors directly beside their associated pins and keep the charge-pump traces short. The SP3232EH uses 0.1 µF capacitors in 3.3 V operation. Avoid routing these switching nodes beneath sensitive analog or communication traces, and maintain the component spacing and ground-return arrangement shown in the MaxLinear application circuit. Exact capacitor tolerances and voltage ratings should follow the manufacturer recommendations.
Keep RS-232 driver outputs and receiver inputs away from clock, UART, and analog-sensing traces to reduce capacitive coupling from the charge-pump and line-driver stages. Route the connector side as an unprotected or separately protected interface zone, and provide a low-impedance chassis or signal-ground return according to the cable topology. The IC's 15 kV HBM rating addresses specified human-body contact conditions but does not eliminate external surge or ground-loop risks.
Do not substitute a similarly named SP3232 or SP3238 device solely because it uses a 16-SSOP package. Before replacement, verify all 16 connections, supply range, driver and receiver count, data rate, charge-pump capacitor values, operating-temperature grade, ESD rating, and shutdown behavior against the manufacturer datasheet. Because SP3232EHCA-L/TR is obsolete, also obtain lot traceability and lifecycle confirmation to prevent unintended mixing with electrically different ordering suffixes.
合规信息
The product information identifies a lead-free status field but does not provide a complete compliance statement. RoHS, REACH, AEC-Q100, halogen-free, and conflict-minerals statuses therefore remain unconfirmed. The interface is described as meeting true EIA/TIA-232-F standards from a 5.5 V supply.
