MAX3243IPW - 250kbps RS-232 Transceiver | Texas Instruments
Артикул: MAX3243IPW ✓ АктивенMAX3243IPW Обзор
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.
Аналоги без доработки для MAX3243IPW — тот же корпус, pin-to-pin совместимость. Компоненты в других корпусах, требующие переработки PCB, исключены.
MAX3243CPW
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MAX3243IPW Характеристики
| 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 |
| Корпус | 28-pin TSSOP |
| Package Dimensions | 5.30 mm nominal package width |
| Тип монтажа | Surface mount |
| Диапазон рабочих температур | 0°C to 70°C |
| Power-Saving Feature | AutoShutdown |
| ROUT2B Output | Always enabled |
| INVALID Output | Always enabled |
| Статус RoHS | unknown |
| REACH Status | unknown |
| AEC-Q100 Qualification | not_applicable |
| Lead-Free Status | unknown |
| Halogen-Free Status | unknown |
| Conflict-Minerals Status | unknown |
| Число выводов | 28 pins |
Руководство по цоколевке MAX3243IPW в корпусе 5.30 mm nominal package width
Цоколевка для MAX3243IPW (корпус 5.30 mm nominal package width). Нумерация выводов, функции и схемы подключения определены в техническом описании производителя. Обратитесь к нему для точного посадочного места и рекомендаций по пайке.
Нет подробных данных о распиновке для MAX3243IPW.
Обратитесь к даташиту для полной конфигурации выводов.
Типичное применение
MAX3243IPW подходит для 6 применениеs: 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.
Рекомендуется
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.
Рекомендуется
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.
Рекомендуется
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.
Рекомендуется
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.
Рекомендуется
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.
Рекомендуется
Сводка рекомендуемых товаров
Справочные инженерные данные для MAX3243IPW — сравнение, рекомендации по проектированию и информация о соответствии.
Руководство по выбору
Сравнение с аналогами
| Параметр | Этот товар | 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 |
Ключевые отличия
- Asymmetric channel integration (против MAX3232IPW)
- Integrated HBM ESD protection (против TRS3243CPW)
- Always-enabled monitoring outputs (против MAX3243CPW)
Заметки по проектированию
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.
Информация о соответствии
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.