SP3232EUCA-L/TR - 3.3V 1Mbps RS-232 IC | MaxLinear
N.º de pieza: SP3232EUCA-L/TR ✓ ActivoSP3232EUCA-L/TR Descripción general
An RS-232 transceiver is an interface IC that translates digital logic levels into RS-232 line levels and converts received RS-232 signals back into logic-compatible levels. It belongs to the interface IC hierarchy alongside serial transceivers, line drivers, and line receivers. These devices simplify serial-port design by combining the active driver circuitry, receiver circuitry, and the required charge-pump voltage conversion in a single IC.
The SP3232EU operates from a 3 V to 5.5 V supply and supports data rates up to 1000 kbps. Its two-driver and two-receiver arrangement can serve two communication channels or provide additional driver and receiver channels for handshake and control signals. The 3.3 V operating capability makes the device suitable for systems based on modern low-voltage microcontrollers, embedded processors, and portable equipment. MaxLinear identifies true EIA/TIA-232-F operation from a supply as high as 5.5 V.
Its internal high-efficiency charge-pump supply generates the voltage required by the RS-232 drivers while allowing operation with only 0.1 uF external capacitors in 3.3 V designs. This approach reduces external component count compared with implementations that require additional bulk capacitance. The SP3232EU therefore combines a compact SSOP-16 footprint with a high data rate and low-voltage operation.
Typical uses include portable-computer accessories, handheld equipment, industrial serial interfaces, point-of-sale terminals, instrument connections, and embedded-control systems. In an embedded design, the transceiver can connect a 3.3 V controller UART to an external RS-232 connector while preserving the logic-level translation required by the RS-232 standard.
Layout should keep the charge-pump capacitors and communication-line protection close to their associated pins, while separating the transceiver from sensitive analog or high-speed digital circuits. Confirm the package pin assignments and connector signal mapping in the manufacturer datasheet before PCB release.
This product page combines the MaxLinear family specifications, verified distributor listings, package details, and practical selection guidance. It also distinguishes same-family alternatives by verified electrical ratings and package information so engineers can assess replacement suitability without treating merely similar components as drop-in replacements.
Alternativas directas para SP3232EUCA-L/TR — 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 SP3232EUCA-L/TR (mismo factor de forma y huella) — difiere en Package, Maximum Data Rate, Operating Temperature, Mounting Type, Operating Supply Voltage.
SP3232EEY-L/TR
✅ Sustitución directaConsulte el precio
Ver hoja de datos →SP3232ECY-L/TR
✅ Sustitución directaConsulte el precio
Ver hoja de datos →SP3232ECA-L/TR
✅ Sustitución directaConsulte el precio
Ver hoja de datos →SP3232EEN-L/TR
✅ Sustitución directaConsulte el precio
Ver hoja de datos →SP3232EUCA-L/TR Especificaciones
| Product Type | RS-232 transceiver |
| Number of Drivers | 2 |
| Number of Receivers | 2 |
| Supply Voltage Range | 3 V to 5.5 V |
| Maximum Data Rate | 1000 kbps |
| Interface Protocol | RS-232 |
| Standards Compliance | EIA/TIA-232-F |
| Charge-Pump External Capacitance | 0.1 uF in 3.3 V operation |
| Encapsulado | 16-SSOP, 0.209 inch width |
| Package Length | 5.30 mm |
| Tipo de montaje | Surface Mount |
| Packaging | Tube |
| Lead-Free Status | Lead Free |
Guía de configuración de pines de SP3232EUCA-L/TR 5.30 mm
Configuración de pines para SP3232EUCA-L/TR (encapsulado 5.30 mm). 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 SP3232EUCA-L/TR.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
SP3232EUCA-L/TR es adecuado para 6 aplicacións: Portable Equipment Serial Ports, Industrial Instrument Connectivity, Point-of-Sale Terminal Interfaces, Embedded Debug and Service Interfaces, Automated Test Equipment, Data Acquisition Modules.
Portable Equipment Serial Ports
The SP3232EUCA-L/TR fits portable and handheld equipment that requires a conventional RS-232 port alongside a modern 3.3 V controller. MaxLinear identifies the SP3232EU family for portable or hand-held applications, and its 3 V to 5.5 V supply range supports low-voltage system integration. Two drivers and two receivers allow one bidirectional data channel plus two additional lines for control or handshake functions. At 1000 kbps, the interface also accommodates relatively fast serial links, although baud rate, cable behavior, and receiver margins must be verified together. The 16-SSOP footprint and 0.1 uF charge-pump capacitors in 3.3 V operation help reduce board area, while ESD protection and proper RS-232 connector grounding remain external design responsibilities.
Recomendado
Industrial Instrument Connectivity
The SP3232EUCA-L/TR is suitable for industrial instrumentation that must communicate over RS-232 from a 3.3 V embedded controller. Its two-driver and two-receiver arrangement supports a main data path plus status, alarm, or reset signals, while the 1000 kbps capability provides headroom for rapidly transferred measurement records. The integrated charge-pump supply requires only 0.1 uF external capacitors in 3.3 V operation, simplifying the power section compared with a discrete implementation. In an instrument enclosure, place the transceiver near the serial connector, include suitable transient protection for externally accessible cables, and observe the RS-232 ground and signal conventions. Verify the actual line rate and environmental noise margin because the 1000 kbps rating is a device capability rather than a guarantee of reliable communication over every cable length.
Recomendado
Point-of-Sale Terminal Interfaces
The SP3232EUCA-L/TR can connect a point-of-sale terminal or peripheral controller to an RS-232 service interface using its two drivers and two receivers. A 3.3 V host can operate the transceiver without a 5 V-only interface arrangement, while the 1000 kbps maximum rate supports legacy serial transactions and firmware-transfer workloads. The 16-SSOP package simplifies compact peripheral construction, and the charge-pump design needs only 0.1 uF capacitors in 3.3 V operation. In a retail terminal, protect the externally accessible connector against electrostatic discharge and use the receiver channels for printer status or acknowledgment signals. The exact pin mapping and signal-polarity requirements should be confirmed from the manufacturer datasheet, particularly when replacing an older RS-232 implementation with different driver and receiver assignments.
Recomendado
Embedded Debug and Service Interfaces
The SP3232EUCA-L/TR provides a robust service and debug interface for embedded systems that retain an RS-232 port for configuration, firmware loading, or diagnostic commands. Its 3 V minimum supply suits 3.3 V processor platforms, while the 1000 kbps capability can shorten transfer times compared with lower-rate serial links. Two drivers and two receivers allow the design to route command data in both directions and carry hardware handshake signals. The device's 16-SSOP package requires careful fanout from a small microcontroller footprint, so use the manufacturer pin description to preserve the intended channel assignment. For field-accessible ports, add appropriate ESD and surge protection and confirm the ground-reference strategy between the connected equipment. The interface IC cannot compensate for an unsuitable cable, incorrect baud rate, or inadequate logic-voltage compatibility.
Recomendado
Automated Test Equipment
The SP3232EUCA-L/TR can serve as the RS-232 interface in automated test equipment, fixture controllers, and laboratory peripherals operating from a 3.3 V control platform. The two-driver and two-receiver structure supports command traffic plus response, ready, or fault signaling, and the 1000 kbps rating is appropriate for transferring compact test records and status blocks. Its integrated charge pump reduces external capacitance to 0.1 uF in 3.3 V operation, while the compact 16-SSOP package helps control board area. Keep the high-rate RS-232 traces short and away from sensitive measurement circuitry, and provide connector-level protection where cables leave the enclosure. Equipment programmers should validate the command protocol separately because UART settings and RS-232 electrical readiness do not by themselves guarantee application-level interoperability.
Recomendado
Data Acquisition Modules
The SP3232EUCA-L/TR is useful in compact data-acquisition modules that need an RS-232 command and data path to a host computer. The 3 V to 5.5 V operating range supports low-voltage acquisition hardware, and the 1000 kbps capability is suitable for streaming moderate volumes of digitized measurements without tying up the host interface. Two drivers and two receivers provide flexibility for bidirectional commands and separate status signaling. The 16-SSOP footprint is appropriate for densely populated modules, but the external RS-232 connector should be isolated from analog input stages to minimize ground and switching noise coupling. Use short routes for the charge-pump capacitors, maintain recommended return paths, and add transient protection for long or user-accessible cables. Verify line capacitance and cable length when operating near the maximum supported data rate.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para SP3232EUCA-L/TR — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | SP3232EEY-L/TR | SP3232ECY-L/TR | SP3232ECA-L/TR | SP3232EEN-L/TR |
|---|---|---|---|---|---|
| Brand | MaxLinear | MaxLinear | MaxLinear | MaxLinear | MaxLinear |
| Package | 16-SSOP | SSOP-16 | SSOP-16 | SSOP-16 | SSOP-16 |
| Device Type | RS-232 Transceiver | RS-232 Transceiver | RS-232 Transceiver | RS-232 Transceiver | RS-232 Transceiver |
| Number of Drivers | 2 | 2 | 2 | 2 | 2 |
| Number of Receivers | 2 | 2 | 2 | 2 | 2 |
| Maximum Data Rate | 1000 kbps | 1000 kbps | 1000 kbps | 1000 kbps | 1000 kbps |
Diferenciadores clave
- Four-channel RS-232 interface in one compact package (frente a SP232EET-L)
- Supports high-speed serial transfer (frente a SP3232ECY-L/TR)
- Low-voltage charge-pump implementation (frente a SP3232EEY-L/TR)
Notas de diseño
Place the two 0.1 uF charge-pump capacitors directly beside their associated SP3232EU pins, with short ground returns and no intervening test pads or long traces. The manufacturer specifies these capacitors for 3.3 V operation. Keep the RS-232 driver and receiver routes away from oscillators, switching regulators, ADC references, and sensitive sensor inputs to reduce coupling into the external interface.
Do not treat the SP3232EUCA-L/TR as a TTL UART level converter. Its driver outputs and receiver inputs implement RS-232 signal levels, including the negative-going voltage used on TX and positive-going signaling used by the receivers. Check every receiver output and driver input connection against the family pin description, especially when replacing circuitry with a different RS-232 pin arrangement.
For externally accessible connectors, add appropriately rated ESD or surge protection and route the protected RS-232 traces directly to the transceiver. Keep protection devices close to the connector and their ground connection short. Do not route the protected line through sensitive analog areas, and maintain the intended equipment-ground relationship because RS-232 communication is not a balanced differential link.
The 1000 kbps device rating does not guarantee reliable communication over an arbitrary cable length or baud rate. Validate the UART settings, cable capacitance, grounding, and receiver noise margin in the final equipment. If the link is intermittent, check connector pin numbering and transceiver channel assignments before changing components or increasing the data rate.
Información de cumplimiento
The exact-MPN listing identifies the component as lead free. RoHS, REACH, halogen-free, and conflict-minerals status were not explicitly stated for this exact order code.
