SP3232EEY-L - 120kbps Dual RS-232 | MaxLinear | TSSOP-16
N.º de pieza: SP3232EEY-L ✓ ActivoSP3232EEY-L Descripción general
An RS-232 transceiver is an interface IC that translates digital logic-level signals into voltage-limited, polarity-aware differential signals used by RS-232 links. Within the hierarchy of interface circuits, it connects UART-compatible logic to serial equipment through the RS-232 electrical standard. This makes the SP3232EEY-L useful where a modern embedded system must communicate with legacy, industrial, or service equipment through a wired serial port.
The SP3232EEY-L supports data rates up to 120 kbps under full load and accepts a 3.0 V to 5.5 V operating supply range. Its 1 mA supply-current specification suits portable and embedded systems, while the 16-pin TSSOP package supports compact surface-mount PCB layouts. The two-driver, two-receiver arrangement can implement two RS-232 channels or provide driver and receiver resources for one channel.
Its charge-pump architecture generates the positive and negative voltage levels needed by true RS-232 operation without a separate bipolar supply. At 3.3 V, the manufacturer documentation specifies operation with 0.1 µF charge-pump capacitors. The external capacitor selection and layout remain important because an unsuitable capacitor type or long trace can increase output distortion or reduce reliable data-rate margin.
Typical applications include embedded UART expansion, portable diagnostic equipment, industrial serial interfaces, point-of-sale terminals, security equipment, and service-console adapters. The device is particularly appropriate for equipment that must use a full RS-232 interface while operating from a 3.3 V or 5 V logic supply rather than a conventional ±12 V RS-232 supply.
When designing around the SP3232EEY-L, verify the exact pin assignments, charge-pump capacitor requirements, and transceiver enable or shutdown behavior against the manufacturer datasheet before PCB release. Place the required capacitors close to their associated pins, provide a solid ground connection, and route connector-facing driver outputs away from sensitive receiver and logic signals.
This product page combines the verified manufacturer specifications, distributor availability information, same-family drop-in candidates, and practical interface-design guidance. It also distinguishes verified electrical attributes from parameters that still require datasheet confirmation, helping engineers evaluate fit before committing a compact RS-232 design to production.
Alternativas directas para SP3232EEY-L — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con SP3232EEY-L (mismo factor de forma y huella) — difiere en Operating Supply Voltage, Package.
SP3222EEY-L/TR
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
SP3222EUEY-L/TR
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
SP3232EUEY-L/TR
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
SP3232EEY-L Especificaciones
| Product Type | RS-232 transceiver |
| Number of Drivers | 2 |
| Number of Receivers | 2 |
| Maximum Data Rate | 120 kbps under full load |
| Tensión de alimentación de funcionamiento | 3.0 V to 5.5 V |
| Corriente de alimentación | 1 mA |
| RS-232 Standard | True EIA/TIA-232-F operation |
| Charge-Pump Capacitor at 3.3 V | 0.1 µF |
| Temperatura de funcionamiento | -40 °C to +85 °C |
| Encapsulado | 16-pin TSSOP |
| Tipo de montaje | Surface mount |
Guía de configuración de pines de SP3232EEY-L 16-pin tssop
Configuración de pines para SP3232EEY-L (encapsulado 16-pin tssop). La numeración de pines, las funciones y los diagramas de conexión se definen en la hoja de datos del fabricante. Consúltela para conocer el footprint exacto y las directrices de soldadura.
No hay datos detallados de patillaje disponibles para SP3232EEY-L.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
SP3232EEY-L es adecuado para 6 aplicacións: Portable RS-232 Diagnostic Equipment, Embedded UART-to-RS-232 Bridge, Industrial Controller Serial Interface, Point-of-Sale Terminal Connectivity, Security and Access-Control Equipment, Legacy Equipment Service Adapter.
Portable RS-232 Diagnostic Equipment
The SP3232EEY-L fits portable diagnostic tools that expose a wired RS-232 service port while operating from a 3.3 V or 5 V system supply. Its 120 kbps maximum data rate under full load is sufficient for many legacy service consoles and UART peripherals, while the documented 1 mA supply current helps control the transceiver's contribution to battery drain. The 16-TSSOP package also conserves board area. The charge pump requires only 0.1 µF capacitors at 3.3 V, but the external capacitor type and placement must follow the manufacturer layout to preserve signal quality.
Recomendado
Embedded UART-to-RS-232 Bridge
The SP3232EEY-L provides a direct bridge between a 3.3 V or 5 V UART and an RS-232 port without a separate bipolar supply. Its two drivers and two receivers allow two converter channels to be implemented, or a spare driver and receiver to be used according to the interface architecture. Operation up to 120 kbps supports conventional UART links, while true EIA/TIA-232-F operation provides appropriate driver levels for legacy equipment. Designers should keep connector-side traces away from receiver inputs and verify the exact terminal assignments in the manufacturer datasheet before layout release.
Recomendado
Industrial Controller Serial Interface
The SP3232EEY-L is suitable for industrial controllers that must retain compatibility with RS-232 equipment through a 3.0 V to 5.5 V controller platform. Its 120 kbps rate is appropriate for configuration ports, status links, and service channels, and its -40 °C to +85 °C specified operating range supports extended-temperature equipment when used within the complete system's thermal and reliability limits. The single-supply charge-pump architecture simplifies system power compared with a discrete ±12 V transmitter design. Industrial cabling still requires suitable protection, grounding, and isolation based on the installation environment.
Recomendado
Point-of-Sale Terminal Connectivity
Point-of-sale terminals can use the SP3232EEY-L to connect a low-voltage controller to printers, scales, readers, or service equipment that exposes RS-232. The 120 kbps maximum data rate accommodates many transactional peripheral protocols, and the 3.0 V to 5.5 V operating range permits integration with common embedded logic supplies. Its compact 16-TSSOP footprint and 0.1 µF charge-pump capacitor requirement at 3.3 V support space-constrained designs. Because retail peripherals may use long cables or shared grounds, the implementation should include appropriate transient protection and verify signal levels at the connector.
Recomendado
Security and Access-Control Equipment
The SP3232EEY-L can support legacy configuration or commissioning ports on access-control panels, readers, and security controllers. A true RS-232 interface simplifies interoperability with service laptops and peripheral equipment that predates USB-only connections, while the single 3.0 V to 5.5 V supply simplifies low-power panel architecture. Its 120 kbps rate is suitable for configuration traffic rather than high-bandwidth sensor streaming. Engineers should account for cable transients, ground potential differences, and security requirements when selecting connectors and adding protection; transceiver compliance alone does not establish system-level regulatory approval.
Recomendado
Legacy Equipment Service Adapter
The SP3232EEY-L is well suited to compact adapters that connect modern USB or embedded controllers to legacy RS-232 service equipment. Two transmitters and two receivers provide enough channels for common transmit, receive, and handshake arrangements, and 120 kbps operation covers the data rates used by many older instruments and controllers. Running from 3.0 V to 5.5 V permits use with common USB-to-serial bridge logic. The adapter designer should follow the exact pinout, provide continuous ground connectivity, and assess whether the legacy device requires unusual handshake, polarity, or biasing arrangements.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para SP3232EEY-L — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | SP3222EEY-L/TR | SP3222EUEY-L/TR | SP3232EUEY-L/TR |
|---|---|---|---|---|
| Brand | MaxLinear, Inc. | MaxLinear, Inc. | MaxLinear, Inc. | MaxLinear, Inc. |
| Package | 16-TSSOP | 16-TSSOP | 16-TSSOP | 16-TSSOP |
| Transceiver Configuration | 2 drivers, 2 receivers | 2 drivers, 2 receivers | 2 drivers, 2 receivers | 2 drivers, 2 receivers |
| Maximum Data Rate | 120 kbps | 120 kbps | 120 kbps | 120 kbps |
| Operating Supply Voltage | 3.0 V to 5.5 V | 3.0 V to 5.5 V | 3.0 V to 5.5 V | 3.0 V to 5.5 V |
| Charge-Pump Capacitor at 3.3 V | 0.1 µF | 0.1 µF | 0.1 µF | 0.1 µF |
| RS-232 Compliance | True EIA/TIA-232-F | True EIA/TIA-232-F | True EIA/TIA-232-F | True EIA/TIA-232-F |
Diferenciadores clave
- Provides the exact SP3232E identity with a compact low-voltage interface (frente a SP3222EEY-L/TR)
- Uses a low-capacitance charge-pump configuration (frente a SP3232EUEY-L/TR)
- Two-driver and two-receiver organization supports flexible RS-232 port allocation (frente a SP3222EUEY-L/TR)
Notas de diseño
Place the charge-pump capacitors close to the exact pins identified in the MaxLinear datasheet and use the specified capacitor type and tolerance. At 3.3 V, the documented capacitance is 0.1 µF. Keep the charge-pump traces short, connect the ground return through a low-impedance path, and avoid routing them beneath noisy switching nodes. Long loops increase transient current and can reduce output-signal integrity or reliable data-rate margin.
Separate connector-facing RS-232 driver traces from receiver inputs, logic signals, clocks, and sensitive analog nodes. Route the ground reference alongside the interface where practical, and keep the transceiver close to the connector so transient protection can be placed directly at the entry point. Verify the final pin map against the manufacturer drawing because the supplied source confirms the 16-TSSOP package but does not expose individual terminal names.
Do not assume that a 3.3 V supply eliminates the need for proper RS-232 signal handling. The charge pump generates the required bipolar output internally, but external cable transients, ground offsets, and incorrect connector wiring can still damage or disrupt the interface. Confirm the operating data rate, handshake requirements, cable length, and device-specific RS-232 levels before enabling the port, and avoid assuming that the SP3222E shutdown feature is present in every SP3232E ordering code.
Información de cumplimiento
The supplied search results did not contain an explicit RoHS, REACH, lead-free, halogen-free, conflict-minerals, or automotive-qualification declaration for this exact MPN. Compliance certificates should be requested from MaxLinear for the exact orderable part.