MAX3243EIRHBR - 500kbps RS-232 Transceiver | Texas Instruments
Référence : MAX3243EIRHBR ✓ ActifMAX3243EIRHBR Présentation
An RS-232 transceiver is an interface IC that translates logic-level signals from a host, controller, or embedded processor into RS-232-compatible levels and converts returning RS-232 signals back into logic levels. It belongs to the interface IC hierarchy, where transceiver products connect digital systems to communication ports requiring greater signal range, noise immunity, and electrical protection than ordinary logic I/O provides.
The MAX3243EIRHBR provides three transmit channels and five receive channels, allowing several RS-232 links to be consolidated in one device. Its dual charge-pump circuit supports single-supply operation, while the integrated charge-pump capacitors reduce external component count. The device is designed for asynchronous serial communication and meets TIA/EIA-232-F interface requirements.
ESD protection is a defining feature of the MAX3243E family. According to the manufacturer product documentation, the serial-port connection pins withstand plus or minus 15kV using the HBM and IEC61000-4-2 air-gap discharge methods, plus or minus 8kV using the IEC61000-4-2 contact-discharge method. These ratings help protect connector-facing circuitry from electrostatic discharge events.
Typical applications include industrial serial-port adapters, test and measurement equipment, point-of-sale terminals, data-acquisition modules, and embedded systems that connect legacy RS-232 peripherals. The combination of multiple drivers, multiple receivers, a 3V to 5.5V supply range, and protected connector pins supports compact multi-port designs where board area and component count are important.
PCB layout should keep the charge-pump capacitor connections and connector-side signal paths compact and appropriately separated. Pay particular attention to exposed-pad soldering, grounding, and the relationship between external cable transients and the protected RS-232 pins. Verify the complete pin configuration in the manufacturer pin-description table before assigning signals because the orderable RHB package includes power, ground, driver, receiver, and exposed-pad connections.
This page combines the manufacturer's electrical and protection ratings with package information, same-footprint alternatives, application guidance, and design-oriented comparisons. These engineering details help distinguish the MAX3243EIRHBR from lower-channel-count transceivers, alternative data-rate versions, and other 32-pin RS-232 interface families.
Alternatives de remplacement direct pour MAX3243EIRHBR — 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 MAX3243EIRHBR (même facteur de forme et même empreinte) — différant par Maximum Data Rate, Package.
TRS3243E
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ST3243ECTR-E
✅ Remplacement directContactez-nous pour le prix
Voir la fiche technique →ADM3232E
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
SP3243E
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ISL3241EIRZ
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MAX3243EIRHBR Spécifications
| Product Type | RS-232 line driver/receiver transceiver |
| Supply Voltage Range | 3V to 5.5V |
| Maximum Data Rate | 500kbps |
| Number of Line Drivers | 3 |
| Number of Line Receivers | 5 |
| Charge-Pump Architecture | Dual charge-pump circuit |
| HBM ESD Protection | ±15kV |
| IEC61000-4-2 Air-Gap ESD Protection | ±15kV |
| IEC61000-4-2 Contact ESD Protection | ±8kV |
| RS-232 Standard Compliance | TIA/EIA-232-F |
| Boîtier | 32-VQFN, 5x5mm |
| Type de montage | Surface mount |
| Automotive Qualification | Not qualified |
Guide de configuration des broches du MAX3243EIRHBR 32-vqfn, 5x5mm
Configuration des broches du MAX3243EIRHBR (boîtier 32-vqfn, 5x5mm). 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 MAX3243EIRHBR.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
MAX3243EIRHBR convient pour 6 applications: Industrial RS-232 Multiport Adapter, Test and Measurement Instrument, Point-of-Sale Terminal Interface, Data-Acquisition Controller, Legacy Equipment Service Interface, Embedded Serial Communication Hub.
Industrial RS-232 Multiport Adapter
MAX3243EIRHBR fits an industrial multiport adapter because it combines three line drivers and five line receivers in one 32-VQFN 5x5mm package. The three-driver configuration can support multiple outbound control or data paths, while five receivers can monitor status, acknowledgments, and incoming data from connected equipment. Its 3V to 5.5V supply range supports both 3.3V and 5V system rails. Connector-facing ESD protection of ±15kV under HBM and IEC61000-4-2 air-gap discharge methods adds useful protection where cables may be connected in uncontrolled environments.
Recommandé
Test and Measurement Instrument
The MAX3243EIRHBR is useful in test and measurement instruments that must exchange commands and return measurements through legacy RS-232 equipment. Its three drivers support separate transmit channels, while five receivers allow more device signals to be monitored than a one-transceiver, one-receiver arrangement. Operation from 3V to 5.5V supports embedded instrument architectures, and the 500kbps rate provides useful margin for command traffic and asynchronous data transfer. Connector-side protection helps reduce sensitivity to electrostatic discharge during bench integration.
Recommandé
Point-of-Sale Terminal Interface
MAX3243EIRHBR can interface a point-of-sale controller with receipt printers, scanners, scales, and customer-display equipment using separate RS-232 ports. Three transmit channels permit simultaneous outbound communication to several peripherals, and five receive channels provide additional paths for acknowledgments and status information. The single-supply 3V to 5.5V operation simplifies integration with mixed-voltage logic systems. Its specified ESD protection on serial-port pins is particularly valuable in retail terminals where peripheral cables may be connected and disconnected during installation or servicing.
Recommandé
Data-Acquisition Controller
MAX3243EIRHBR suits data-acquisition controllers that combine sensor-interface conditioning with a legacy RS-232 uplink. Five receivers can accept trigger, status, acknowledgment, and measurement-control signals, while three drivers can communicate with a host computer and two external devices. The 500kbps maximum rate supports reliable asynchronous transfer of compact commands and sampled status information. Its compact 32-VQFN 5x5mm package helps conserve board area, and the integrated dual charge-pump arrangement reduces the number of external charge-pump components required in the RS-232 interface section.
Recommandé
Legacy Equipment Service Interface
MAX3243EIRHBR can provide a service interface for legacy equipment that retains RS-232 communication but is being embedded into a newer controller platform. The asymmetric three-driver, five-receiver arrangement allows status lines and control commands to be consolidated without dedicating a separate transceiver to every path. Supply operation from 3V to 5.5V makes the device suitable for both legacy 5V logic and modern 3.3V embedded systems. The connector-side ESD ratings help withstand handling transients, while the compact VQFN package supports board-level modernization around an existing serial protocol.
Recommandé
Embedded Serial Communication Hub
MAX3243EIRHBR is appropriate for an embedded communication hub that must bridge a host controller to several RS-232 peripherals. Three driver channels can serve three outbound links, and five receiver channels provide parallel inbound paths, reducing the number of discrete interface devices required. The 500kbps rate supports common asynchronous serial-control protocols, while the 3V to 5.5V supply range allows the hub to operate from common embedded rails. Its compact 5x5mm footprint and protected serial pins support space-constrained industrial and commercial control products.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour MAX3243EIRHBR — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | TRS3243E | ST3243E | ADM3232E | SP3243E | ISL3241EIRZ |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | STMicroelectronics | Analog Devices | NXP Semiconductors | Renesas Electronics |
| Package | 32-VQFN, 5x5mm | 32-VQFN | 32-VQFN | 32-VQFN | 32-VQFN | 32-VQFN |
Principaux différenciateurs
- Five receivers provide greater inbound channel capacity than a conventional one-driver, one-receiver RS-232 device. (vs TRS3243E)
- Supports a 500kbps data rate for higher-throughput RS-232 links than the 250kbps MAX3243 family member. (vs MAX3243)
- Connector-facing pins include clearly defined HBM and IEC61000-4-2 protection ratings. (vs ADM3232E)
Notes de conception
Place the charge-pump capacitors and associated component connections directly beside the MAX3243EIRHBR with the shortest practical traces. These nodes carry repetitive charge-pump energy, so excessive loop area can increase radiated emissions and coupling into nearby analog or communication circuitry. Follow the manufacturer recommended capacitor values, voltage ratings, and placement diagram, and avoid routing connector-side RS-232 traces beneath or directly beside the charge-pump network.
Do not treat the RS-232 driver outputs and receiver inputs as ordinary logic-level GPIO. Driver outputs connect to external serial cables and require the charge-pump-generated bipolar levels, while receiver inputs are designed for RS-232 thresholds and must not be exposed to unrelated voltage sources. Confirm the exact direction of every RIN and OUT connection in the manufacturer pin table, especially when consolidating multiple ports into a shared connector.
Provide a continuous ground reference beneath the 32-VQFN footprint and follow the manufacturer's exposed-pad soldering pattern. Keep the exposed pad connected to the appropriate ground plane with adequate thermal-via density for assembly and service requirements. Connector-side surge or discharge events can inject transient current into nearby circuitry, so route external serial lines directly toward protected pins and keep unrelated sensitive traces away from the connector region.
Validate receive-node rise and fall times in the complete system because cable length, termination, stubbing, and ground offsets can affect an RS-232 link even when the transceiver operates within its data-rate limit. Maintain a common ground between connected equipment where required by the interface topology, and use the receiver's documented noise and threshold behavior when designing long or electrically noisy cables.
Informations de conformité
TIA/EIA-232-F interface compliance, ±15kV HBM protection, ±15kV IEC61000-4-2 air-gap protection, and ±8kV IEC61000-4-2 contact protection are documented. RoHS, REACH, lead-free, halogen-free, and conflict-minerals status were not explicitly identified and remain unknown.
