SP3232EEN-L - 120kbps RS-232 Transceiver | MaxLinear
料号： SP3232EEN-L ✓ 量产中SP3232EEN-L 概述
An RS-232 transceiver is an interface IC that bridges TTL/CMOS logic and unbalanced, differential RS-232 signals. The SP3232E series belongs to the interface-IC hierarchy and integrates two line drivers, two line receivers, a charge-pump supply, and power-management functions. This integration allows a portable or embedded product to communicate with RS-232 equipment without implementing external level-shifting transistors and separate negative-voltage generation circuitry.
The principal operating specifications include 120 kbps data rate, a 3 V to 5.5 V supply range, approximately 1 mA supply current, and 1 µA shutdown current as reported by the verified distributor and technical-search results. The high-efficiency charge-pump design permits only 0.1 µF capacitors in 3.3 V operation. These characteristics support low-power portable equipment while reducing external component count and simplifying board layout.
Technically, the device uses a charge pump to generate the positive and negative voltages required by RS-232 line drivers. The SP3232EEN-L combines two transmitters and two receivers in one 16-pin SOIC, making it suitable for bidirectional serial links that do not require more than two channels. The verified material identifies true RS-232 operation from a single supply and compliance with EIA/TIA-232-F; detailed slew-rate, receiver-threshold, and channel-isolation values remain in the manufacturer datasheet.
Typical uses include portable data-collection equipment, notebook and palmtop computer peripherals, industrial service interfaces, configuration ports, and embedded systems that exchange serial commands with RS-232 equipment. The 16-pin SOIC format is useful for compact commercial and industrial boards, while the -40°C to +85°C rating supports temperature-controlled equipment beyond ordinary consumer environments.
Designers should follow the manufacturer datasheet for charge-pump capacitor selection, VCC decoupling, and signal routing. Capacitors should be placed close to their associated pins, and the RS-232 cable interface should include the required protection and grounding arrangement. Supply and signal paths should be kept separate to prevent charge-pump and digital switching energy from coupling into communication lines.
This product record combines verified distributor specifications, official manufacturer documentation, price references, and carefully qualified drop-in alternatives. It also adds practical application guidance, selection criteria, and comparison parameters that are not normally consolidated on a basic distributor listing.
直接替换替代料： SP3232EEN-L ——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： SP3232EEN-L （相同外形与封装尺寸） ——差异在于 Operating Temperature, Package, Maximum Data Rate, Device Type, ESD Protection.
SP3222EEN-L
✅ 直接替换📋 参考替代料（不在目录中）
SP232ECT-L
✅ 直接替换联系询价
查看数据手册 →MAX3232ESE-T
✅ 直接替换📋 参考替代料（不在目录中）
SP3232EEN-L 规格参数
| Transceiver Type | 2/2 transceiver, full RS-232 |
| Number of Drivers | 2 |
| Number of Receivers | 2 |
| Maximum Data Rate | 120 kbps |
| 工作电源电压 | 3 V to 5.5 V |
| Nominal Supply Current | 1 mA |
| 关断电流 | 1 µA |
| 工作温度 | -40°C to +85°C |
| 封装 | 16-pin SOIC |
| 安装类型 | Surface mount |
| RS-232 Standard | True EIA/TIA-232-F operation |
| Charge-Pump Capacitor Value | 0.1 µF in 3.3 V operation |
| System ESD Rating | ±15 kV IEC 61000-4-2 and ±15 kV HBM |
| Receiver Status During Shutdown | Active for the SP3222E/SP3232E series |
| Power-Supply Topology | Single-supply charge-pump RS-232 interface |
| RoHS 状态 | unknown |
| Lead-Free Status | unknown |
| Automotive Qualification | not_qualified |
SP3232EEN-L 16-pin soic 引脚配置指南
SP3232EEN-L（16-pin soic 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： SP3232EEN-L.
请参阅 数据手册 以查看完整引脚配置。
典型应用
SP3232EEN-L 适用于 6 应用s: Portable Data Collection Equipment, Industrial Instrument Control, Point-to-Point Configuration Port, Serial Adapter and Peripheral, Battery-Powered Remote Terminal, Legacy Equipment Service Interface.
Portable Data Collection Equipment
SP3232EEN-L suits portable data-collection equipment that must exchange RS-232 commands with an external meter, terminal, or sensor interface. Its 3 V to 5.5 V supply range permits operation from common single-rail systems, while the 0.1 µF charge-pump capacitors specified for 3.3 V use reduce the external component burden. The 1 µA shutdown current is valuable when the instrument spends extended periods between sessions. The 120 kbps rate is appropriate for command traffic and moderate data transfers rather than continuous high-bandwidth streaming.
推荐
Industrial Instrument Control
The SP3232EEN-L can bridge a controller and a legacy RS-232 instrument in industrial test, maintenance, or process-support equipment. Its specified -40°C to +85°C operating range is suitable for many temperature-controlled industrial environments, and the integrated two-driver, two-receiver arrangement supports bidirectional control and status reporting. The 3 V to 5.5 V operating range simplifies connection to mixed 3.3 V and 5 V systems. External protection is still advisable when the cable leaves the enclosure.
推荐
Point-to-Point Configuration Port
SP3232EEN-L is appropriate for a point-to-point configuration link between an embedded controller and a service adapter, programmer, or peripheral. Two receivers and two drivers provide flexibility for bidirectional command and diagnostic channels without requiring an external level shifter. The 120 kbps maximum data rate is more than adequate for configuration traffic and boot messages. Use the manufacturer-recommended charge-pump capacitors and keep the RS-232 traces away from clocks and switching power nodes to preserve signal integrity.
推荐
Serial Adapter and Peripheral
The SP3232EEN-L enables a compact serial adapter to add a full-duplex RS-232 port to a controller board. Its 16-pin SOIC package supports conventional surface-mount assembly, while the integrated charge pump removes the need for a separate negative-voltage generator and discrete RS-232 driver array. The 3.3 V-compatible charge-pump implementation is useful in space-constrained adapters. Designers should verify connector protection, isolation requirements, and logic thresholds before connecting to a particular legacy peripheral.
推荐
Battery-Powered Remote Terminal
SP3232EEN-L can support a battery-powered remote terminal that periodically connects to an RS-232 service port. Its approximately 1 mA operating supply current and 1 µA shutdown mode help reduce energy use between communication sessions, while the 3 V to 5.5 V range accommodates common battery regulators. The 120 kbps rate supports configuration logs and short command exchanges. The exact average-current budget should include charge-pump, external pull networks, and any enabled receiver or indicator loads.
推荐
Legacy Equipment Service Interface
SP3232EEN-L provides a practical service interface for modern electronics that must communicate with older RS-232 equipment. Its two drivers and two receivers can support transmit, receive, handshake, and status lines where the original system used discrete transceivers. A 3.3 V or 5 V controller can interface through one device rather than a separate charge-pump circuit. Before connecting to legacy equipment, confirm signal polarity, receiver thresholds, cable grounding, and whether an optoisolated barrier is required for safety.
推荐
推荐产品汇总
工程参考数据： SP3232EEN-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 | SP3222EEN-L | SP232ECT-L | MAX3232ESE-T | MAX202IDR | MAX232DR |
|---|---|---|---|---|---|---|
| Package | 16-pin SOIC | 16-pin SOIC | 16-pin SOIC | 16-pin SOIC | 16-pin SOIC | 16-pin SOIC |
| Brand | MaxLinear | MaxLinear | MaxLinear | Maxim Integrated | Maxim Integrated | Maxim Integrated |
关键差异点
- Single-supply 3.3 V operation with compact charge-pump capacitance （对比 MAX232DR)
- Documented low-power shutdown capability （对比 MAX202IDR)
- Industrial temperature range （对比 SP232ECT-L)
- Explicit 120 kbps operating-rate specification （对比 MAX202IDR)
设计说明
Follow the manufacturer datasheet for the charge-pump capacitors because the verified specification of 0.1 µF applies specifically to 3.3 V operation. Place those capacitors close to their associated IC pins and add the recommended local VCC decoupling. Keep the charge-pump loop compact and avoid routing it beneath or parallel to sensitive RS-232 traces. A common 3.3 V or 5 V rail may be used, but the complete system budget should include the approximately 1 mA device current and any external pull networks.
The 16-pin SOIC footprint should be placed with adequate clearance for the RS-232 connector and external protection devices. Route driver outputs and receiver inputs directly toward the connector while keeping them away from clocks, switching regulators, and high-speed digital nets. Maintain a continuous ground reference beneath the interface area, and follow the manufacturer layout guidance for charge-pump components. If the port is exposed to user-accessible cabling, add external surge protection because the specified ±15 kV ESD rating does not eliminate the need for a robust connector and enclosure strategy.
Do not assume that every 16-pin RS-232 transceiver is electrically interchangeable. Confirm pin numbers, charge-pump connections, shutdown polarity, receiver thresholds, logic polarity, and operating-supply requirements before fitting SP3222EEN-L, SP232ECT-L, MAX3232ESE-T, MAX202IDR, or MAX232DR to an existing board. In particular, a device requiring positive and negative RS-232 rails may not work from the SP3232EEN-L single-supply architecture. Perform an RC logic-level test at the intended baud rate before attaching long or noisy external cables.
RS-232 signaling is unbalanced, so ground noise and cable routing can affect receiver thresholds. Keep the interface ground reference continuous and use the same reference strategy recommended for the attached equipment. Avoid long parallel runs between TX and RX paths, and place protection components close to the connector rather than at the transceiver. The SP3232EEN-L supports up to 120 kbps, but reliable operation at the upper limit still depends on cable characteristics, loading, reflections, and the remote device's timing and threshold characteristics.
合规信息
The verified sources identify EIA/TIA-232-F operation and ±15 kV IEC 61000-4-2 or HBM system ESD protection. They do not provide explicit RoHS, REACH, lead-free, halogen-free, conflict-minerals, or AEC-Q100 declarations; no assumptions were made.