SP3232EBCN-L/TR - 250 kbps True RS-232 Transceiver, 2/2, 16-SOIC | MaxLinear
Артикул: SP3232EBCN-L/TR ✓ АктивенSP3232EBCN-L/TR Обзор
An RS-232 transceiver is the physical-layer bridge between a logic-level UART and a differential, bipolar RS-232 port. RS-232 is a point-to-point, single-ended-plus-ground signalling standard defined in EIA/TIA-232-F; the transceiver's job is to convert TTL/CMOS logic levels into RS-232 levels on transmit and back again on receive. In the signal-chain hierarchy, an RS-232 transceiver sits below the UART controller and above the connector, inside the broader class of interface ICs and line-driver/receiver devices.
Key features include a high-efficiency on-chip charge-pump supply that needs only 0.1 uF capacitors, true EIA/TIA-232-F compliance down to 3.0 V, 250 kbps transmission rate under load, 15 kV ESD protection on all bus pins, and a low-power shutdown mode drawing about 1 uA with the receivers still active. A single charge-pump and dual-pump topology eliminates the need for an external -12 V supply.
The SP3232EB series is built for portable and hand-held equipment, where a single 3.3 V or 5 V rail must drive a legacy RS-232 port. The device also suits industrial data acquisition, instrumentation, point-of-sale terminals and USB-to-RS-232 bridging designs. Its 16-pin narrow SOIC body and standard pinout allow direct placement on existing RS-232 interface boards.
A typical implementation places the transceiver between a microcontroller UART and a DB9 or RJ45-style RS-232 connector, with 0.1 uF charge-pump capacitors close to the V+ and V- pins and 100 nF decoupling on the supply. Pay attention to RS-232 ground referencing in long cable runs: the receiver tolerates a common-mode range, but ground loops in industrial cabinets remain the dominant source of data errors.
This page consolidates parametric detail, drop-in alternatives in the same SOIC-16 footprint, and practical layout guidance that a datasheet alone does not present side by side.
Аналоги без доработки для SP3232EBCN-L/TR — тот же корпус, pin-to-pin совместимость. Компоненты в других корпусах, требующие переработки PCB, исключены.
Варианты в этой серии
Модели той же серии, совместимые без доработки с SP3232EBCN-L/TR (тот же форм-фактор и посадочное место) — отличается по Package, Mounting Type, Operating Temperature, RoHS Status, Number of Drivers.
SP3232EEN-L/TR
✅ Прямая замена ⚠️ Характеристики не провереныУточнить цену
Открыть даташит →SP3232ECY-L/TR
✅ Прямая замена ⚠️ Характеристики не провереныУточнить цену
Открыть даташит →MAX232ACWE+
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
MAX232NSR
✅ Прямая заменаУточнить цену
Открыть даташит →MAX211IDBR
✅ Прямая заменаУточнить цену
Открыть даташит →SP3232EBCN-L/TR Характеристики
| Number of Drivers/Receivers | 2/2 |
| Transceiver Type | Full duplex RS-232 transceiver |
| Supply Voltage Range | 3 V to 5.5 V |
| Скорость передачи данных | 250 kbps under load |
| ESD Protection | 15 kV on RS-232 pins |
| Standards Compliance | True EIA/TIA-232-F |
| Supply Topology | On-chip charge pump, single supply |
| Charge-Pump Capacitor | 0.1 uF per pump node |
| Shutdown Supply Current | 1 uA with receivers active |
| Корпус / Типоразмер | 16-SOIC (0.154 in, 3.90 mm width) |
| Packaging | Tape and reel (TR) |
| Тип монтажа | Surface mount (SMD/SMT) |
| Рабочая температура | 0 °C to +70 °C |
| Automotive Qualification | Not AEC-Q100 qualified |
| Статус RoHS | RoHS details listed on product listings |
Руководство по цоколевке SP3232EBCN-L/TR в корпусе 16-soic (0.154 in, 3.90 mm width)
Цоколевка для SP3232EBCN-L/TR (корпус 16-soic (0.154 in, 3.90 mm width)). Нумерация выводов, функции и схемы подключения определены в техническом описании производителя. Обратитесь к нему для точного посадочного места и рекомендаций по пайке.
Нет подробных данных о распиновке для SP3232EBCN-L/TR.
Обратитесь к даташиту для полной конфигурации выводов.
Типичное применение
SP3232EBCN-L/TR подходит для 6 применениеs: USB-to-RS-232 Port Adapters, Portable Test and Measurement Instruments, Industrial Data Acquisition Terminals, Point-of-Sale and Retail Peripherals, Programmable Power Supply and Bench Equipment, Industrial Sensor and Actuator Nodes.
USB-to-RS-232 Port Adapters
The SP3232EBCN-L/TR fits where a USB-to-serial bridge needs a standards-compliant RS-232 port rather than a bare TTL UART. Two drivers and two receivers per package cover the full set of TXD, RXD, RTS and CTS handshaking lines of a PC-style DB9 connector, so one IC replaces four discrete parts. The 3.0 V to 5.5 V operating range lets the adapter share a 3.3 V regulator with the USB controller, while the 250 kbps data rate comfortably exceeds the 115.2 kbaud common on legacy RS-232 peripherals and keeps up with 460.8 kbaud industrial adapters. The 15 kV ESD protection is valuable because the RS-232 connector is the most exposed point on the board.
Рекомендуется
Portable Test and Measurement Instruments
Hand-held oscilloscopes, logic analysers and process meters increasingly ship with legacy RS-232 service ports because instrument software already speaks that protocol. The SP3232EBCN-L/TR was designed for portable equipment: the on-chip charge pump needs only 0.1 uF capacitors and no external negative supply, which keeps the board area and quiescent current low in a battery-powered enclosure. The 250 kbps rate supports fast transfer of captured waveforms and log files over an instrument PC link, and the shutdown mode drawing about 1 uA with receivers still active allows the port to be powered down between measurements without losing an incoming connection.
Рекомендуется
Industrial Data Acquisition Terminals
Data loggers and terminal blocks that must talk to legacy supervisory systems typically expose an RS-232 port alongside RS-485. Using the SP3232EBCN-L/TR for the RS-232 channel alongside an RS-485 transceiver simplifies the power tree, because both parts can sit on a 3.3 V or 5 V rail and share the same decoupling strategy. The 250 kbps rate supports polling protocols that return large record buffers, and the true EIA/TIA-232-F compliance with 15 kV ESD handling suits cabinets where the RS-232 cable is shorter than the RS-485 run but still subject to industrial noise. Note the 0 °C to +70 °C commercial temperature rating when deploying in unheated cabinets.
Рекомендуется
Point-of-Sale and Retail Peripherals
Point-of-sale terminals, scales, barcode scanners and receipt printers in retail environments still expose RS-232 ports for peripheral chaining, and these cables are frequently handled by staff and customers. The SP3232EBCN-L/TR addresses that use case with 15 kV ESD protection on the bus pins, which greatly reduces the failure rate compared with unprotected transceivers, and a 250 kbps rate that keeps transaction latency low when a receipt printer streams large jobs. The narrow SOIC-16 footprint leaves board space for the connector and its mechanical retention, and the 3.0 V to 5.5 V supply range permits a single-regulator design across the product family.
Рекомендуется
Programmable Power Supply and Bench Equipment
Bench power supplies, electronic loads and calibration fixtures commonly offer an RS-232 command interface so that legacy PC software can automate measurements. The SP3232EBCN-L/TR provides the driver and receiver pairs needed for a full duplex command port, and the 250 kbps rate allows dense SCPI command streams to be sent without flow-control stalls. Because the device runs from 3.3 V, the interface can be powered from the same low-noise rail as the instrument control section rather than requiring a legacy plus/minus 5 V supply, which simplifies the analogue side of the instrument and reduces heat inside a vented enclosure.
Рекомендуется
Industrial Sensor and Actuator Nodes
Remote sensor hubs and actuator controllers that report over a wired RS-232 link benefit from a transceiver that tolerates a single low-voltage rail and survives industrial ESD events on long cable runs. The SP3232EBCN-L/TR combines 15 kV ESD protection with true EIA/TIA-232-F compliance, and its 250 kbps rate is well matched to periodic telemetry frames rather than continuous streaming. A node built around a 3.3 V microcontroller therefore needs no negative rail, and the 0.1 uF charge-pump capacitors can be placed close to the IC, which helps when the node board is small and the enclosure shares a ground with switching machinery.
Рекомендуется
Сводка рекомендуемых товаров
Справочные инженерные данные для SP3232EBCN-L/TR — сравнение, рекомендации по проектированию и информация о соответствии.
Руководство по выбору
Сравнение с аналогами
| Параметр | Этот товар | SP3232EEN-L/TR | SP3232ECY-L/TR | MAX232ACWE+ | MAX232NSR | MAX211IDBR |
|---|---|---|---|---|---|---|
| Brand | MaxLinear | MaxLinear | MaxLinear | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Package | SOIC-16 (narrow, 0.154 in / 3.90 mm) | SOIC-16 (narrow) - same | SOIC-16 (narrow) - same | SOIC-16 (narrow) - same | SOIC-16 (narrow) - same | SOIC-16 (narrow) - same |
| Number of Drivers/Receivers | 2/2 | 2/2 | 2/2 | 2/2 | 2/2 | 2/2 |
| Supply Voltage Range | 3 V to 5.5 V | 3 V to 5.5 V | 3 V to 5.5 V | Plus/minus 5 V | Plus/minus 5 V | Plus/minus 5 V |
| Charge-Pump / Negative Rail Generation | On-chip charge pump, 0.1 uF capacitors, no external negative supply | On-chip charge pump, 0.1 uF capacitors | On-chip charge pump, 0.1 uF capacitors | On-chip charge pump, external plus/minus 5 V rails | On-chip charge pump, external plus/minus 5 V rails | On-chip charge pump, external plus/minus 5 V rails |
| Packing / Mounting | Tape & reel, surface mount | Tape & reel, surface mount | Tape & reel, surface mount | Tape & reel, surface mount | Tape & reel, surface mount | Tape & reel, surface mount |
Ключевые отличия
- Operates from a single 3.0 V to 5.5 V rail while still delivering true RS-232 levels (против MAX232NSR)
- 250 kbps transmission rate under load, more than twice the speed of the lower-cost family member (против SP3232EEN-L/TR)
- 15 kV ESD protection integrated on the RS-232 bus pins (против MAX232ACWE+)
- Only 0.1 uF charge-pump capacitors and no external negative supply (против MAX211IDBR)
Заметки по проектированию
Place the 0.1 uF charge-pump capacitors on the V+ and V- pins as close to the package as the layout allows, with the ground pad of each capacitor returning directly to the device ground reference. Long pump traces behave like an antenna and add ripple to the generated negative rail, which shows up as jitter on the driver output and as occasional receive errors at the far end of the cable. Keep the RS-232 driver and receiver pins away from switching nodes and from the clock and digital return paths of the host processor, and route the connector-side nets as a matched, isolated group with a solid ground reference underneath.
Decouple the supply with a 100 nF ceramic capacitor close to VCC and a bulk 1 uF to 10 uF capacitor nearby, and connect the RS-232 connector ground to the board ground at a single point rather than through the cable shield path of a switching stage. The SP3232EBCN-L/TR needs only 3.0 V to 5.5 V, so in 3.3 V designs the transceiver can share the rail with the MCU; note however that RS-232 driver outputs swing roughly plus 8 V to minus 8 V relative to ground, and that current is drawn from the charge pump rather than from the logic supply, so the rail still needs to tolerate the transient. Confirm the datasheet current figures against your actual cable loading before sizing the regulator.
Two mistakes account for most field failures of RS-232 designs. First, substituting a plus/minus 5 V MAX232-class part into a 3.3 V board: the pinout is similar but the supply requirement is not, and the circuit will not start. Second, assuming the logic side is 5 V tolerant when it is driven from a 3.3 V MCU: the driver inputs on the SP3232EB family are referenced to VCC, so confirm the logic thresholds in the datasheet. Also verify the ground reference at the far end of the cable, since a long RS-232 run with a large ground potential difference causes receive errors that look like baud-rate faults.
An RS-232 cable behaves as an unbalanced antenna, so radiated emissions are dominated by the driver edge rate and by cable length. Terminate the driver output with the recommended series network near the IC, and prefer a shielded cable with a chassis-grounded shield at the connector end rather than a signal-ground connection, to keep common-mode current out of the board ground. If the port must coexist with switching regulators or a high-speed digital bus on the same board, increase the spacing between the RS-232 traces and the noisy nets, and consider a ferrite or common-mode choke in the cable path to reduce both emissions and susceptibility.
Информация о соответствии
RoHS details are listed for the SP3232EB family on the MaxLinear product page, but no explicit compliance statement, REACH declaration or AEC-Q100 qualification was available for this ordering code. The 0 °C to +70 °C rating places it in commercial, not automotive, grade.
