SP3232EBEY-L/TR - Dual RS-232 Transceiver | MaxLinear
MPN： SP3232EBEY-L/TR ✓ 啟用中SP3232EBEY-L/TR 概覽
An RS-232 transceiver is an interface IC that converts logic-level signals into RS-232 line levels and receives RS-232 signals for conversion into logic-level inputs. In the product hierarchy, the SP3232EBEY-L/TR belongs to the RS-232 transceiver family, interface IC category, and broader semiconductor and communication-interface ecosystem. It is intended for portable and handheld equipment, including notebook computers and other systems that need bidirectional asynchronous serial communication.
The device combines two transmit channels and two receive channels in one package. Its +3.0 V to +5.5 V supply range accommodates both 3.3 V and 5 V system rails. The 0.1 µF charge-pump capacitor requirement in 3.3 V operation supports compact board layouts, while integrated level translation reduces the number of external interface components required for a basic RS-232 port.
The charge-pump topology generates positive and negative signal levels from a single positive supply. This is important because RS-232 uses voltage levels relative to ground to distinguish mark, space, and invalid states. The SP3232EBEY-L/TR also provides integrated driver and receiver functions, allowing two ports or two directions of communication to be implemented with one interface IC.
Typical applications include portable computers, handheld test equipment, industrial control links, USB-to-RS-232 adapters, embedded serial consoles, and service interfaces. For embedded systems, the transceiver can connect a host UART to an external RS-232 connector. The host controller supplies logic-level transmit and receive signals, while the transceiver handles the physical voltage conversion and signal buffering.
When designing the circuit, follow the charge-pump capacitor connection and placement requirements in the manufacturer datasheet. Keep the interface connector and transceiver placement practical for the intended cable length, provide the required bypass and charge-pump capacitance, and account for the electrical characteristics of the connected RS-232 port. A software-controlled power-down feature may also require careful interface-state handling.
This product page combines package details, verified interface specifications, cross-reference findings, and practical implementation guidance. It also identifies the differences that matter when comparing the SP3232EBEY-L/TR with same-family and cross-brand RS-232 transceivers, helping engineers narrow the choice before updating a PCB or constructing a new serial interface.
直接替換替代品，適用於 SP3232EBEY-L/TR — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： SP3232EBEY-L/TR （相同外形與佔位） — 差異在於 Mounting Type, Package.
SP3232ECY-L/TR
✅ 直接替換聯絡詢價
查看資料表 →ST3232EBTR
✅ 直接替換📋 參考替代品（不在目錄中）
SP3232EBEY-L/TR 規格
| Product Type | RS-232 transceiver |
| Driver Count | 2 drivers |
| Receiver Count | 2 receivers |
| Supply Voltage Range | +3.0 V to +5.5 V |
| Interface Standard | RS-232 |
| 封裝 | 16-pin TSSOP |
| 安裝類型 | Surface mount |
| Charge-Pump Capacitor at 3.3 V | 0.1 µF |
| Number of Transmit Channels | 2 channels |
| Number of Receive Channels | 2 channels |
| Power Supply Topology | Single positive supply with integrated charge pump |
| RoHS Compliance | unknown |
| REACH Compliance | unknown |
| AEC-Q100 Qualification | not_applicable |
| Lead-Free Status | unknown |
SP3232EBEY-L/TR 16-pin tssop 腳位配置指南
SP3232EBEY-L/TR（16-pin tssop 封裝）的腳位配置。 腳位編號、功能與連接圖定義於製造商資料手冊中。請參閱該手冊以取得確切的封裝尺寸與焊接指引。
無詳細腳位定義資料： SP3232EBEY-L/TR.
請參閱 資料表 以查看完整腳位配置。
典型應用
SP3232EBEY-L/TR 適用於 6 應用s: Portable Computer Serial Port, USB-to-RS-232 Adapter, Embedded Industrial Controller, Portable Test and Measurement Instrument, Service and Configuration Interface, Two-Port RS-232 Communication Hub.
Portable Computer Serial Port
The SP3232EBEY-L/TR fits portable computers and similar handheld equipment because it combines two drivers and two receivers in a 16-pin TSSOP package and operates from a single +3.0 V to +5.5 V source. At 3.3 V, its charge-pump supply requires only 0.1 µF capacitors according to the MaxLinear manufacturer datasheet, helping conserve board area. The resulting circuit can convert a host UART into RS-232 levels without a separate negative supply. Designers should follow the datasheet capacitor placement and decoupling recommendations, particularly near the charge-pump and supply pins.
推薦
USB-to-RS-232 Adapter
A USB-to-RS-232 adapter can use the SP3232EBEY-L/TR at the connector side of the interface. Its two transmitters and two receivers support bidirectional serial communication, while the integrated charge pump supplies the RS-232 voltage relationship from one +3.0 V to +5.5 V rail. The 16-pin TSSOP package is suitable for a compact adapter PCB, and the 0.1 µF charge-pump capacitance specified for 3.3 V operation reduces external capacitor burden. Layout should keep the charge-pump loop compact and route the connector-side nets away from sensitive digital circuitry.
推薦
Embedded Industrial Controller
The SP3232EBEY-L/TR is suitable for adding an RS-232 service or communications port to an embedded industrial controller. Its +3.0 V to +5.5 V operating range allows it to share either a 3.3 V or 5 V controller rail, while two receivers can monitor two incoming lines and two drivers can service two outgoing lines. Its single-supply charge-pump design avoids a separate negative rail. For factory equipment, verify the complete electrical limits, isolation requirements, surge conditions, and connector-ground strategy before releasing the production design.
推薦
Portable Test and Measurement Instrument
Handheld test instruments can use the SP3232EBEY-L/TR to provide a compact RS-232 control or data port. The device's 16-pin TSSOP footprint and single +3.0 V to +5.5 V operation are suitable for battery-powered electronics, while the charge pump generates the required bipolar RS-232 levels without adding a negative supply. The 0.1 µF capacitor requirement in 3.3 V operation supports a compact implementation. Designers should consider cable length, grounding, ESD protection, and the inactivity or shutdown behavior required by the instrument firmware.
推薦
Service and Configuration Interface
The SP3232EBEY-L/TR can implement a service connector that lets an operator configure or inspect an embedded system through a laptop or service tool. Two transmitters and two receivers provide flexible line allocation, while operation from a single 3.3 V or 5 V source simplifies interface power. The integrated charge pump avoids a discrete negative-voltage circuit, which can reduce PCB area and assembly complexity. Place the transceiver near the connector when practical, maintain a continuous ground reference, and apply the connector protection appropriate to the installation environment.
推薦
Two-Port RS-232 Communication Hub
Two bidirectional RS-232 links can be consolidated around the SP3232EBEY-L/TR because the device contains two drivers and two receivers. This arrangement suits equipment that must exchange commands with one peripheral while monitoring a second device. The single +3.0 V to +5.5 V supply range supports common embedded rails, and the 16-pin TSSOP package keeps the interface compact. Engineers must assign the drivers and receivers according to the manufacturer pinout and account for line loading, idle states, and any requirements to hold outputs in a defined condition during reset.
推薦
推薦產品摘要
工程參考資料，適用於 SP3232EBEY-L/TR — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | SP3232ECY-L/TR | ST3232EBTR |
|---|---|---|---|
| Brand | MaxLinear | MaxLinear | STMicroelectronics |
| Package | 16-TSSOP | 16-TSSOP - same | 16-TSSOP - same |
| Product Type | RS-232 transceiver | RS-232 transceiver | RS-232 transceiver |
主要差異化特點
- Single-supply true RS-232 operation (對比ST3232EBTR)
- Dual full-duplex channel capacity (對比SP3232ECY-L/TR)
- Pin-compatible cross-brand sourcing option (對比ST3232EBTR)
設計說明
Place the charge-pump capacitors and supply bypass capacitors exactly as shown in the MaxLinear SP3222E/SP3232E manufacturer datasheet. The 0.1 µF charge-pump capacitance applies to 3.3 V operation, and capacitor values for other supply conditions should be taken from the device documentation. Keep the charge-pump loop short, connect the bypass capacitor close to the supply pin, and avoid routing switching-current paths beneath the connector-side receive traces.
Assign the two drivers and two receivers by following the manufacturer pin-description table rather than relying on package position alone. Route RS-232 connector traces away from clocks, ADC inputs, and other high-impedance analog nodes. Use a continuous interface ground reference where the application permits, and keep external protection components close to the connector so surge current is diverted before entering the IC.
Do not treat logic-level UART signals as RS-232 line signals; the SP3232EBEY-L/TR performs the required level conversion. Check the charge-pump capacitor value against the actual supply voltage, confirm that software or external pull-downs do not conflict with the intended driver states, and review the shutdown truth table before using power saving in a service port. Confirm connector gender and signal names at the assembly level.
合規資訊
The interface IC is not presented as an AEC-Q100-qualified automotive device. Specific RoHS, REACH, lead-free, halogen-free, and conflict-minerals declarations require confirmation from the manufacturer or current product documentation.