SP3232ECT-L - 120kbps RS-232 Transceiver | MaxLinear
Référence : SP3232ECT-L ✓ ActifSP3232ECT-L Présentation
An RS-232 transceiver is an interface IC that converts logic-level signals between a host or controller and RS-232 lines. The transceiver hierarchy includes interface IC, communications interface, and signal-conditioning semiconductor. Unlike TTL or CMOS serial signals, RS-232 uses voltage levels and signaling rules suited to longer-distance, point-to-point links. The SP3232ECT-L integrates the line driver and receiver functions needed to bridge that physical interface.
A principal feature is the integrated high-efficiency charge-pump power supply. According to the manufacturer datasheet, the charge pump permits true RS-232 operation from a single 3 V to 5.5 V supply and requires only 0.1 µF capacitors in 3.3 V operation. This topology raises the supply to the voltage levels required by the RS-232 drivers without requiring a separate negative supply rail.
The device supports a minimum 120 kbps data rate and provides two transmit channels plus two receive channels. That arrangement suits equipment requiring more than one serial link, such as a local-control bus, service interface, or legacy peripheral connection. Its true RS-232 interface is intended for portable computers, handheld terminals, industrial equipment, and other embedded systems that must interoperate with established RS-232 ports.
Typical applications include configuration-port links, handheld test equipment, point-of-sale systems, industrial controllers, and service interfaces for installed equipment. The integrated charge pump reduces external power-supply complexity, while the 16-pin WSOIC package supports compact surface-mount assembly. Because RS-232 is a point-to-point interface, each driver should feed one receiver and unused channels should be handled according to the manufacturer recommendations.
The primary design consideration is correct charge-pump capacitor placement. Place the required 0.1 µF capacitors close to their associated supply and charge-pump pins, maintain short return paths, and provide adequate ground-plane continuity. Account for the additional supply current drawn by the charge pump when calculating power capacity, especially in portable equipment operating from a battery-derived 3.3 V rail.
This product page consolidates the exact SP3232ECT-L operating facts, package information, verified source links, sourcing guidance, and engineering-oriented replacement analysis. It is intended to help designers evaluate the interface function, board-level implementation, and procurement requirements without relying on a generic RS-232 overview.
Alternatives de remplacement direct pour SP3232ECT-L — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec SP3232ECT-L (même facteur de forme et même empreinte) — différant par Device Type, Package.
SP3232ECT
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
SP3232ECT-L/TR
✅ Remplacement directContactez-nous pour le prix
Voir la fiche technique →MAX3232EWE
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
SP3232ECT-L Spécifications
| Device Type | RS-232 transceiver |
| Number of Drivers | 2 |
| Number of Receivers | 2 |
| Minimum Data Rate | 120 kbps |
| Supply Voltage Range | 3 V to 5.5 V |
| Charge-Pump Capacitor at 3.3 V | 0.1 uF |
| Interface Standard | True RS-232 |
| Plage de température de fonctionnement | 0 C to 70 C |
| Boîtier | WSOIC-16 |
| Type de montage | Surface Mount |
| Supply Type | Single supply |
| Charge-Pump Architecture | Integrated high-efficiency charge pump |
| Driver Count per Package | 2 |
| Receiver Count per Package | 2 |
Guide de configuration des broches du SP3232ECT-L 2
Configuration des broches du SP3232ECT-L (boîtier 2). La numérotation des broches, les fonctions et les schémas de connexion sont définis dans la fiche technique du fabricant. Consultez-la pour l'empreinte exacte et les directives de soudage.
Aucune donnée de brochage détaillée disponible pour SP3232ECT-L.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
SP3232ECT-L convient pour 6 applications: Portable Handheld Terminal, Industrial Controller Serial Port, Point-of-Sale Terminal, Embedded Configuration Interface, Test and Measurement Equipment, Data Acquisition and Control Module.
Portable Handheld Terminal
The SP3232ECT-L fits portable and handheld terminals that communicate through a conventional RS-232 port while operating from a 3.3 V system supply. Its integrated high-efficiency charge pump generates the required RS-232 voltage without a separate negative rail, and the manufacturer specifies only 0.1 µF capacitors in 3.3 V operation. Two drivers and two receivers support more than one point-to-point serial interface, while the minimum 120 kbps data rate is suitable for command and service links. The 16-pin WSOIC package also keeps the design compact for handheld enclosures.
Recommandé
Industrial Controller Serial Port
The SP3232ECT-L can provide a legacy-compatible serial port on an industrial controller that must communicate with service equipment or older peripherals. Its two-driver and two-receiver organization allows independent point-to-point channels, and the 120 kbps minimum data rate covers typical configuration and control protocols. Running from 3 V to 5.5 V simplifies interface design across industrial and commercial supply levels. The integrated charge pump avoids a negative supply, while the listed 0 C to 70 C range should be checked against the controller’s environmental enclosure and operating conditions.
Recommandé
Point-of-Sale Terminal
The SP3232ECT-L is suitable for point-of-sale equipment that needs to retain an RS-232 connection to a peripheral, service tool, or legacy controller. The true RS-232 interface operates from a single 3 V to 5.5 V supply, which can simplify power architecture in compact terminals. Two transmit and two receive channels provide flexibility for multiple cable-connected functions, and the 120 kbps data-rate class is appropriate for typical command traffic. Board implementation should keep the 0.1 µF charge-pump capacitors close to the device and maintain a low-impedance ground return.
Recommandé
Embedded Configuration Interface
The SP3232ECT-L supports an embedded configuration port where a controller, test fixture, or production system exchanges setup commands with a target board over RS-232. The two-driver and two-receiver configuration can support separate command and response wiring, and the 120 kbps minimum rate is suitable for typical configuration traffic. Operation from 3 V to 5.5 V allows the interface to share common embedded rails. Because the RS-232 standard is point-to-point, connect each driver to one receiver and apply the manufacturer’s guidance to unused channels.
Recommandé
Test and Measurement Equipment
The SP3232ECT-L can add a service or control interface to bench and field test equipment that still needs true RS-232 connectivity. Its single-supply charge-pump design reduces the number of rails required near the connector, while 3 V to 5.5 V operation supports portable and rack-mounted implementations. The 120 kbps data-rate class is sufficient for many configuration and diagnostic protocols. The two transmit and two receive channels permit multiple point-to-point service connections, subject to normal RS-232 topology and unused-channel recommendations.
Recommandé
Data Acquisition and Control Module
The SP3232ECT-L can connect a data-acquisition or laboratory control module to an RS-232 host through one of its two full channels. The interface supports a minimum 120 kbps rate and a 3 V to 5.5 V supply range, matching systems that derive interface power from either 3.3 V or 5 V rails. Integrating the charge pump removes the need for a discrete negative supply. Two drivers and two receivers allow separate control and status paths when both modules are placed appropriately for point-to-point signaling.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour SP3232ECT-L — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | SP3232ECT | SP3232ECT-L/TR | MAX3232EWE |
|---|---|---|---|---|
| Brand | MaxLinear | MaxLinear | MaxLinear | Maxim Integrated |
| Package | WSOIC-16 | WSOIC-16 - same | WSOIC-16 - same | WSOIC-16 - same |
| Device Type | RS-232 transceiver | RS-232 transceiver | RS-232 transceiver | RS-232 transceiver |
Principaux différenciateurs
- Single-supply true RS-232 operation (vs MAX3232EWE)
- Full two-channel RS-232 implementation (vs SP232EET-L)
- Verified 120 kbps minimum data-rate class (vs MAX3232EWE)
- Portable-system charge-pump implementation (vs SP3232ECT-L/TR)
Notes de conception
Place the specified 0.1 µF charge-pump capacitors directly beside their associated SP3232ECT-L pins and use the shortest practical traces. Keep the capacitor return paths within the same uninterrupted ground-plane region as the device. Avoid routing the RS-232 driver outputs beneath sensitive logic or across split ground planes. The short physical charge-pump loop helps maintain stable internal operation and reduces susceptibility to surrounding noise.
Design the SP3232ECT-L as a point-to-point RS-232 interface: connect each driver to one receiver and prevent multiple loads from sharing the same driver output. Keep the logic-side traces away from the connector-side driver outputs, and route the ground return close to the signal path. Where the enclosure cable leaves the board, place suitable protection components at the connector boundary and follow the manufacturer’s external-circuit recommendations.
Calculate the 3.3 V supply current for the interface and charge-pump circuitry together rather than treating the transceiver as a logic-only load. Estimated: if the device and associated circuitry draw 30 mA at 3.3 V, the ideal input power is 0.099 W; actual rail demand may be higher during charge-pump operation. Confirm the margin against the source current limit, battery impedance, and voltage-drop tolerance.
Do not treat a shared package as proof that an alternative can be substituted. Before replacing SP3232ECT-L, compare supply range, driver and receiver pin assignments, charge-pump capacitor values, shutdown behavior, data-rate limits, and operating temperature. The MAX3232EWE is a review candidate, but its manufacturer datasheet must be checked against the existing PCB. Also follow guidance for unused RS-232 drivers and receivers rather than leaving outputs indeterminate.
Informations de conformité
No definitive RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status was identified in the cited product information.
