SP232AET-L - Dual 120kbps RS-232 Transceiver | MaxLinear
Référence : SP232AET-L ✓ ActifSP232AET-L Présentation
An RS-232 transceiver is an interface IC that converts logic-level UART signals into balanced, single-ended RS-232 line levels and converts received RS-232 signals back into logic-compatible levels. Within the interface-IC hierarchy, the SP232AET-L combines line drivers and line receivers in one device, reducing board area while supporting full-duplex serial communication.
The SP232AET-L operates from a single 4.5V to 5.5V supply and supports 120kbps under load. Its integrated charge pump generates the positive and negative voltage swings required by RS-232, using small 0.1µF ceramic capacitors. Additional interface features include 500mV receiver hysteresis and enhanced ESD protection, with distributor documentation listing 2kV ESD protection and manufacturer-family documentation describing protection above ±15kV under the Human Body Model.
The BiCMOS architecture combines CMOS logic efficiency with bipolar output-driver capability. Two RS-232 drivers provide transmit channels, while two receiver channels support incoming data and modem-control signaling. The device is pin-to-pin compatible with popular industry-standard RS-232 transceiver footprints, which simplifies replacement of compatible transceivers without changing the PCB land pattern.
Typical uses include industrial serial adapters, POS terminals, test equipment, embedded-control links, and legacy peripheral interfaces. The -40°C to +85°C operating-temperature range supports commercial industrial equipment, while its 16-SOIC package simplifies assembly and maintenance in designs that already use through-hole-style RS-232 interface circuits.
The primary design consideration is charge-pump capacitor placement. The manufacturer documentation specifies 0.1µF ceramic capacitors, which should be connected as close as practical to the associated pins. Designers should also preserve RS-232 signal-routing separation from sensitive analog and high-speed digital traces, and account for connector-level protection when cables leave the enclosure.
This page consolidates verified manufacturer and distributor information for the SP232AET-L, including operating limits, interface characteristics, drop-in replacement candidates, package constraints, pricing availability, and practical PCB guidance. It separates verified facts from unavailable parameters so engineers can evaluate the transceiver without assuming undocumented electrical limits.
Alternatives de remplacement direct pour SP232AET-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 SP232AET-L (même facteur de forme et même empreinte) — différant par Mounting Type, Package, RoHS Status.
SP232AEP-L
✅ Remplacement directContactez-nous pour le prix
Voir la fiche technique →SP233AET-L
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
SP310AET-L
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
SP312AET-L
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MAX232DR
✅ Remplacement directContactez-nous pour le prix
Voir la fiche technique →SP232AET-L Spécifications
| Transceiver Configuration | 2 drivers and 2 receivers |
| Protocol Support | EIA/TIA-232 and V.28 |
| Duplex Mode | Full duplex |
| Supply Voltage Range | 4.5V to 5.5V |
| Data Rate Under Load | 120kbps |
| Maximum Data Rate | 240kbps |
| Receiver Hysteresis | 500mV |
| Plage de température de fonctionnement | -40°C to +85°C |
| Boîtier | 16-SOIC |
| Type de montage | SMD surface mount |
| Process Technology | BiCMOS |
| Charge-Pump Capacitor | 0.1µF ceramic |
| ESD Protection Rating | 2kV |
| Human Body Model ESD Tolerance | ±15kV |
| IEC ESD System | IEC 61000-4-2 at ±15kV |
| Statut RoHS | RoHS compliant |
Guide de configuration des broches du SP232AET-L 16-soic
Configuration des broches du SP232AET-L (boîtier 16-soic). 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 SP232AET-L.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
SP232AET-L convient pour 6 applications: Industrial RS-232 Serial Adapter, Point-of-Sale Terminal Interface, Embedded Controller RS-232 Link, Test and Measurement Equipment, Legacy Peripheral Communication, Security and Access-Control Console.
Industrial RS-232 Serial Adapter
The SP232AET-L fits an industrial adapter that converts a UART output into a full-duplex RS-232 link. Its two drivers and two receivers support bidirectional data and control signals, while the verified 120kbps-under-load rate is appropriate for moderate-speed legacy serial links. The 4.5V-to-5.5V supply simplifies interface design, and the -40°C-to-+85°C range supports industrial equipment operating across temperature extremes. Place the 0.1µF charge-pump capacitors close to their pins and route the RS-232 outputs toward a protected DB9 or terminal connector. Compared with a discrete driver-receiver implementation, the integrated device reduces board area while preserving a conventional 16-SOIC footprint.
Recommandé
Point-of-Sale Terminal Interface
The SP232AET-L provides a compact full-duplex interface between a point-of-sale controller and a legacy RS-232 peripheral. The verified 120kbps-under-load capability supports common serial transaction rates, while 500mV receiver hysteresis improves noise tolerance around the switching threshold. Two transmitter and two receiver channels cover both data and selected control functions. A single 4.5V-to-5.5V supply simplifies power architecture, and the 16-SOIC package is easy to assemble on cost-sensitive boards. Keep the charge-pump loop compact and provide connector-side surge or ESD protection if the cable leaves the enclosure, since the integrated ESD rating does not replace a correctly selected external network.
Recommandé
Embedded Controller RS-232 Link
The SP232AET-L can connect a microcontroller UART to a full-duplex RS-232 bus when logic-level signaling must be converted to the bipolar voltage swings required by the standard. Its BiCMOS architecture combines low-voltage logic with bipolar line-driver capability, and the 120kbps-under-load specification provides a clear performance target for firmware and cable selection. The 16-SOIC package supports conventional surface-mount assembly and simplifies repair compared with older through-hole transceivers. Verify the common ground connection and keep long RS-232 traces away from clocks and sensitive sensors. If the port must survive severe industrial cable surges, add appropriately rated protection rather than relying solely on the IC's internal ESD capability.
Recommandé
Test and Measurement Equipment
The SP232AET-L is suitable for test and measurement equipment that exposes a legacy RS-232 configuration port. Its full-duplex 2/2 architecture allows simultaneous transmission and reception, while the 120kbps-under-load rate supports command and response traffic common on laboratory instruments. The -40°C-to-+85°C rating is useful for equipment expected to operate outside a controlled office environment. Designers can use the 4.5V-to-5.5V input range with common regulated rails and should follow the datasheet's 0.1µF ceramic capacitor configuration. For instrument rear panels, route the transceiver output to the connector through a defined protection structure and maintain signal-ground continuity to reduce common-mode noise.
Recommandé
Legacy Peripheral Communication
The SP232AET-L supports legacy peripherals that use full-duplex RS-232 but do not accept modern USB or differential serial signaling. Two drivers and receivers allow both command output and status input, while 500mV hysteresis helps reject noise on slow-changing receive lines. The single 5V-class supply and 16-SOIC package make the device practical for replacement boards and controller upgrades that already use a standard RS-232 land pattern. Its 120kbps-under-load rating is suitable for many peripheral protocols, but designers should verify each device's timing and cable limitations. When upgrading an existing product, check every supply, ground, driver-output, receiver-input, and charge-pump connection before fitting the MaxLinear part.
Recommandé
Security and Access-Control Console
The SP232AET-L can provide the RS-232 port used by access-control readers, intercoms, and alarm panels in installations that retain legacy serial consoles. The full-duplex topology supports command transmission and event reception, and the -40°C-to-+85°C range covers many indoor and protected industrial environments. Its 2kV distributor-listed ESD rating and enhanced family-level protection provide useful margin, but door-mounted cables still require connector-level surge suppression. Use the verified 4.5V-to-5.5V supply range to select the local regulator and place the 0.1µF ceramic charge-pump capacitors close to the device. Maintain separation from motor, relay, and Ethernet circuits to avoid coupling command errors into the control path.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour SP232AET-L — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | SP232AEP-L | SP233AET-L | SP310AET-L | SP312AET-L | MAX232DR |
|---|---|---|---|---|---|---|
| Package | 16-SOIC | 16-SOIC | 16-SOIC | 16-SOIC | 16-SOIC | 16-SOIC |
| Brand | MaxLinear | MaxLinear | MaxLinear | MaxLinear | MaxLinear | Maxim Integrated |
| Protocol Support | EIA/TIA-232 and V.28 | RS-232 family | RS-232 and V.28 family | RS-232 and V.28 family | RS-232 and V.28 family | RS-232 equivalent family |
Principaux différenciateurs
- Verified industrial temperature capability (vs MAX232DR)
- Conservative loaded data-rate specification (vs MAX232DR)
- Small ceramic charge-pump support (vs SP232AEP-L)
Notes de conception
Use the manufacturer-specified 0.1µF ceramic charge-pump capacitors and place them as close as practical to the SP232AET-L pins. Keep the associated traces short, avoid routing them beneath or parallel to sensitive signal paths, and provide a low-impedance ground connection. The verified family documentation specifically supports ceramic capacitors, so do not substitute an arbitrary value without checking the datasheet's tolerance, voltage-rating, and stability requirements.
Keep RS-232 driver outputs on the connector side of the board and separate them from clocks, sensors, amplifiers, and other noise-sensitive nodes. Maintain a continuous signal-ground path between the transceiver, UART source, and connector. When the cable exits the enclosure, provide appropriately rated connector-side protection and a chassis-ground strategy; the IC's internal ESD capability does not eliminate the need for an external surge and ESD network.
Do not treat any same-package RS-232 IC as automatically interchangeable. Before substituting SP232AEP-L, SP233AET-L, SP310AET-L, SP312AET-L, or MAX232DR, verify the numbered pinout, 4.5V-to-5.5V supply compatibility, ground arrangement, charge-pump capacitor values, driver polarity, receiver thresholds, maximum data rate, and temperature range. The verified family relationship supports drop-in investigation, but it does not replace an orderable-part datasheet review.
Informations de conformité
The supplied SP232AET-L specification record identifies the device as RoHS compliant. No verified REACH, lead-free, halogen-free, conflict-minerals, or automotive qualification statement was supplied. The IEC 61000-4-2 reference describes ESD immunity testing rather than product compliance certification.