MAX3243IPW - 250kbps RS-232 Transceiver | Texas Instruments
Référence : MAX3243IPW ✓ ActifMAX3243IPW Présentation
An RS-232 transceiver is an interface IC that combines the electrical functions required to communicate between TTL or CMOS logic and RS-232 logic levels. Within the interface hierarchy, the MAX3243IPW is a multichannel RS-232 transceiver, also described as a line driver and receiver. Its driver channels convert logic-level inputs into RS-232-compatible signals, while its receiver channels convert incoming RS-232 signals into logic-level outputs.
The MAX3243IPW operates from 3 V to 5.5 V, supports signaling up to 250 kbps, and includes ±15-kV ESD protection using the HBM test method on the serial-port connection pins. Three drivers and five receivers provide an asymmetric channel count suited to applications such as DE-9 serial connections. The manufacturer also describes AutoShutdown functionality and always-enabled ROUT2B and INVALID outputs for monitoring ring and valid-input status.
The wider supply range allows the interface to operate from 3.3-V or 5-V system rails without a separate RS-232 transceiver supply. Multiple integrated drivers and receivers reduce the number of external interface ICs required in multi-channel equipment. Always-enabled status outputs can simplify supervision of modem or communications equipment, although their fixed operation should be checked against the system power-management architecture.
Typical uses include legacy RS-232 serial ports, industrial control interfaces, data-acquisition equipment, point-of-sale terminals, and embedded systems requiring legacy peripheral connectivity. The MAX3243IPW can also complement a modern microcontroller or transceiver module when an existing enclosure or cable standard still exposes RS-232 signals. Careful signal-level, grounding, and ESD layout practices remain necessary in electrically noisy environments.
For PCB design, place the device near the connector or protected interface entry point and route protected RS-232 traces away from sensitive analog and clock circuitry. Confirm that the exposed connector pins have appropriate surge and ESD protection because the integrated ±15-kV HBM rating does not eliminate the need for an engineered external protection strategy. Follow the manufacturer pin-description and layout guidance for decoupling, grounding, and protection-network placement.
This product reference combines the MAX3243IPW electrical identity, verified package information, channel configuration, interface capabilities, and application-oriented engineering guidance. It also provides a framework for checking pin-compatible alternatives, understanding the limits of interface protection, and selecting between integrated transceivers, system transceivers, and newer communication architectures.
Alternatives de remplacement direct pour MAX3243IPW — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
MAX3243CPW
✅ Remplacement directContactez-nous pour le prix
Voir la fiche technique →TRS3243CPW
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MAX3243IPW Spécifications
| Product Type | Multichannel RS-232 line driver and receiver |
| Supply Voltage Range | 3 V to 5.5 V |
| Maximum Data Rate | 250 kbps |
| Number of Drivers | 3 |
| Number of Receivers | 5 |
| ESD Protection | ±15 kV HBM |
| Technology | RS-232 and CMOS |
| Boîtier | 28-pin TSSOP |
| Package Dimensions | 5.30 mm nominal package width |
| Type de montage | Surface mount |
| Plage de température de fonctionnement | 0°C to 70°C |
| Power-Saving Feature | AutoShutdown |
| ROUT2B Output | Always enabled |
| INVALID Output | Always enabled |
| Statut RoHS | unknown |
| REACH Status | unknown |
| AEC-Q100 Qualification | not_applicable |
| Lead-Free Status | unknown |
| Halogen-Free Status | unknown |
| Conflict-Minerals Status | unknown |
| Nombre de broches | 28 pins |
Guide de configuration des broches du MAX3243IPW 5.30 mm nominal package width
Configuration des broches du MAX3243IPW (boîtier 5.30 mm nominal package width). 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 MAX3243IPW.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
MAX3243IPW convient pour 6 applications: DE-9 Serial-Port Interface, Industrial Control Equipment, Data-Acquisition Systems, Point-of-Sale Terminals, Embedded Legacy-Peripheral Connectivity, Instrumentation and Test Equipment.
DE-9 Serial-Port Interface
The MAX3243IPW is well suited to a DE-9-style serial interface because it combines three drivers and five receivers in one 28-pin TSSOP package. According to the TI product page, this asymmetric arrangement is ideal for a DTE interface. The device operates from 3 V to 5.5 V, supports signaling up to 250 kbps, and provides ±15-kV HBM ESD protection on the serial-port connection pins. Place the transceiver near the connector, maintain a continuous signal-ground path, and confirm the logic polarity and channel assignments before routing the PCB.
Recommandé
Industrial Control Equipment
The MAX3243IPW can bridge low-voltage control logic and legacy RS-232 equipment used in industrial panels, test systems, and production equipment. Its 3- to 5.5-V operating range allows use with common embedded supply rails, while the 250-kbps limit is appropriate for configuration links and supervisory commands rather than high-speed bulk transfer. The integrated ±15-kV HBM protection improves robustness at accessible connector pins, but field installations still require careful grounding, cable design, and external surge protection.
Recommandé
Data-Acquisition Systems
For data-acquisition equipment that must communicate with an older RS-232 controller, the MAX3243IPW provides three transmit channels and five receive channels without requiring several separate transceiver packages. The 250-kbps maximum rate supports typical command and measurement-data traffic, while operation from 3.3 V or 5 V simplifies interface design around embedded processors. Keep the RS-232 traces away from sensitive analog inputs, use a solid ground reference, and check the receiver thresholds against the actual noise environment of the measurement system.
Recommandé
Point-of-Sale Terminals
The MAX3243IPW can support the combination of printer, reader, or service-console connections found in point-of-sale terminal designs. Its three-driver and five-receiver arrangement permits more than one RS-232 line function from a single 28-pin TSSOP device, while the 250-kbps rate matches many peripheral-control protocols. The 3- to 5.5-V range is compatible with embedded system rails, and the integrated HBM ESD protection is valuable at user-accessible connectors. Verify protocol timing, connector wiring, and shield termination for each peripheral.
Recommandé
Embedded Legacy-Peripheral Connectivity
The MAX3243IPW provides a practical bridge between a modern microcontroller and legacy equipment that exposes only RS-232. A three-driver, five-receiver arrangement can consolidate several handshake and status lines, while the 250-kbps limit supports command-oriented serial links. Because the transceiver accepts low-voltage CMOS-style logic and operates down to 3 V, it can sit close to the host processor. Confirm host serial levels, use the manufacturer reference circuit for charge-pump capacitors, and avoid substituting a general-purpose logic-level converter for the RS-232 interface.
Recommandé
Instrumentation and Test Equipment
The MAX3243IPW is appropriate for laboratory and field-test instruments that retain RS-232 control interfaces for compatibility with existing computers or service equipment. Its multi-channel arrangement can reduce the number of external packages, and the 3- to 5.5-V supply range accommodates both 3.3-V and 5-V control hardware. The maximum 250-kbps signaling rate is suitable for configuration and status traffic. Use short, well-referenced cable paths where possible and evaluate external protection for ports connected to long or industrial cables.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour MAX3243IPW — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | MAX3243CPW | TRS3243CPW |
|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 28-pin TSSOP | 28-pin TSSOP | 28-pin TSSOP |
| Product Type | Multichannel RS-232 transceiver | Multichannel RS-232 transceiver | Multichannel RS-232 transceiver |
| Supply Voltage Range | 3 V to 5.5 V | 3 V to 5.5 V | 3 V to 5.5 V |
| Maximum Data Rate | 250 kbps | 250 kbps | 250 kbps |
| Number of Drivers | 3 | 3 | 3 |
| Number of Receivers | 5 | 5 | 5 |
| ESD Protection | ±15 kV HBM | ±15 kV HBM | ±15 kV HBM |
| AutoShutdown | Yes | Yes | Yes |
Principaux différenciateurs
- Asymmetric channel integration (vs MAX3232IPW)
- Integrated HBM ESD protection (vs TRS3243CPW)
- Always-enabled monitoring outputs (vs MAX3243CPW)
Notes de conception
Place the MAX3243IPW close to the RS-232 connector or protected interface entry point. Route driver and receiver traces together with their corresponding ground reference, minimize loop area, and keep the RS-232 nets away from clocks, sensor inputs, and analog amplifiers. Follow the manufacturer layout examples for the charge-pump capacitors and protection components. The integrated ±15-kV HBM rating improves robustness but does not replace a system-level ESD and surge-protection strategy.
Use the manufacturer datasheet to select the required bypass and charge-pump capacitors, including the required capacitance, voltage rating, and dielectric. Place these components close to their associated terminals and minimize the current-loop area. Because the device operates from 3 V to 5.5 V, verify the selected supply tolerance, startup behavior, and AutoShutdown interaction with the host. Do not assume that a logic-level supply automatically guarantees an uninterrupted, valid RS-232 output during brownout.
Do not treat a 28-pin package suffix as proof of pin compatibility. Check every terminal name and number, including driver inputs, receiver outputs, charge-pump nodes, ground connections, and the always-enabled ROUT2B and INVALID outputs. Also avoid connecting a TTL or CMOS UART directly to the RS-232 connector; the transceiver must perform the voltage-level and signal-symmetry conversion. Verify logic polarity and handshake timing against the connected equipment.
RS-232 signals can radiate when cable transitions are fast, especially with long or unterminated cables. Maintain the intended ground connection, use a controlled cable shield where the system design requires it, and keep unprotected external traces short. Avoid routing RS-232 nets beneath sensitive analog circuitry. If the port is exposed to industrial transients, place an appropriately rated external protection network at the connector while respecting the manufacturer’s protection-circuit guidance.
Informations de conformité
The manufacturer product page and datasheet excerpts do not explicitly state the requested compliance results. The IPW ordering code is associated with the industrial 0°C to 70°C temperature grade shown in the part information.