MAX3243ECRHBR - 3/5 RS-232 Transceiver, 500kbps, 32-VQFN | TI
Артикул: MAX3243ECRHBR ✓ АктивенMAX3243ECRHBR Обзор
An RS-232 transceiver is a bidirectional interface IC that converts logic-level TTL/CMOS signals into RS-232 level voltages on transmit and back into logic levels on receive. Within the power-management and interface hierarchy, the MAX3243E family sits at the physical-layer boundary between a host UART and a cable-attached peripheral, adding level translation, noise immunity, and electrostatic-discharge (ESD) hardening that a bare UART driver pair cannot provide.
Key features of the MAX3243ECRHBR include ±15 kV ESD protection on all serial pins under the human body model (HBM), ±15 kV air-gap and ±8 kV contact discharge per IEC 61000-4-2, a dual on-chip charge pump that generates the bipolar RS-232 levels from a single supply, and a 3-to-5.5 V operating range that allows direct interfacing with 3.3 V and 5 V host logic without level shifters. A single-channel shutdown pin places the device in a low-power state when the port is idle.
Architecturally, the device splits its channels asymmetrically: three drivers share the charge-pump rails for a typical transmit group, while five receivers provide more receive inputs than there are transmit outputs. This suits equipment where the host must listen to several peripherals but only drives one or two lines, such as multi-drop industrial terminals and POS equipment. The wide common-mode range of the receivers allows them to interpret RS-232 signals referenced to ground even when the two ends of a long cable sit at different ground potentials.
Typical applications include industrial serial consoles, barcode scanners, weighing scales, laboratory instrument control ports, point-of-sale terminals, and battery-powered handheld peripherals that still require a hardened RS-232 port. The small 5 mm square VQFN footprint also makes the device attractive for space-constrained handheld and portable designs where a TSSOP would be too long for the board outline.
When laying out this device, place the charge-pump flying capacitors and the RS-232 line-side protection network close to the device, and route the driver outputs directly to the connector with a common-ground return path. Use the pin-description table in the manufacturer datasheet to assign logic-side and line-side nets, and confirm the VQFN exposed-pad soldering and thermal requirements in the package drawing section.
Аналоги без доработки для MAX3243ECRHBR — тот же корпус, pin-to-pin совместимость. Компоненты в других корпусах, требующие переработки PCB, исключены.
MAX3243EIRHBRG4
✅ Прямая заменаУточнить цену
Открыть даташит →TRS3253EIRSMR
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
SP3243EUER-L/TR
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
SP3243EE-L
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
SP3243CT-L
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
MAX3243ECRHBR Характеристики
| Product Type | Multichannel RS-232 line driver/receiver (transceiver) |
| Supply Voltage Range | 3 V to 5.5 V |
| Скорость передачи данных | 500 kbps |
| Number of Drivers | 3 |
| Number of Receivers | 5 |
| ESD Protection, HBM | +/-15 kV |
| ESD Protection, IEC 61000-4-2 Air Gap | +/-15 kV |
| ESD Protection, IEC 61000-4-2 Contact | +/-8 kV |
| Charge Pump | Dual, on-chip |
| Корпус | 32-VQFN (5 mm x 5 mm), RHBR |
| Число выводов | 32 pins |
| Диапазон рабочих температур | 0 °C to 70 °C |
| Тип монтажа | Surface mount |
| Logic Compatibility | CMOS/TTL logic-side signals |
| Shutdown Control | Yes, dedicated shutdown input |
| Termination | Standard RS-232, no external termination required |
Руководство по цоколевке MAX3243ECRHBR в корпусе 32-vqfn (5 mm x 5 mm), rhbr
Цоколевка для MAX3243ECRHBR (корпус 32-vqfn (5 mm x 5 mm), rhbr). 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 MAX3243ECRHBR.
Обратитесь к даташиту для полной конфигурации выводов.
Типичное применение
MAX3243ECRHBR подходит для 6 применениеs: Industrial Serial Console and Terminal Ports, Point-of-Sale and Retail Peripherals, Laboratory and Test Instrument Control, Battery-Powered Handheld and Portable Devices, Multi-Drop and Multi-Peripheral Serial Links, Security and Access Control Equipment.
Industrial Serial Console and Terminal Ports
The MAX3243ECRHBR fits industrial consoles because it combines three RS-232 drivers with five receivers, allowing a controller to drive command lines while listening on several status lines from the same peripheral cluster. Its ±15 kV HBM and ±8 kV contact IEC 61000-4-2 protection ratings directly address the connector-side ESD exposure typical of factory floor equipment, where cables are connected and disconnected daily. The 3 V to 5.5 V supply range lets the same part sit beside 3.3 V industrial PLC logic or 5 V controller boards without extra level shifters. Operating from 0 °C to 70 °C covers most indoor and lightly conditioned enclosure temperatures.
Рекомендуется
Point-of-Sale and Retail Peripherals
Point-of-sale terminals drive barcode scanners, receipt printers, and customer displays over RS-232, and the MAX3243ECRHBR handles several of these links from one IC thanks to its three transmitters and five receivers. Only 3 V to 5.5 V is required, so the transceiver can be powered from the same 5 V rail as the rest of a POS terminal or from a 3.3 V rail in newer designs. The compact 32-VQFN (5 mm x 5 mm) footprint keeps the board area small on space-constrained handheld POS hardware, where a 32-pin TSSOP body would consume excessive board length. ESD protection on the exposed connector pins reduces field failures from static events during customer-facing use.
Рекомендуется
Laboratory and Test Instrument Control
Laboratory analyzers, bench power supplies, and oscilloscopes still expose RS-232 for instrument control and SCPI-style command exchange. The MAX3243ECRHBR supports 500 kbps data rates, which comfortably covers instrument control traffic while leaving margin for error-free framing on longer cables. The five receiver channels let a single transceiver accept trigger, status, and interlock signals from several instruments while the transmitters handle the command and data channels. Its wide receiver common-mode range lets it interpret signals on cables whose far end sits at a different ground potential, which is common on bench setups with chained instruments.
Рекомендуется
Battery-Powered Handheld and Portable Devices
Handheld data collectors and portable measurement devices still rely on RS-232 for docking to printers, scales, and GPS receivers, and the MAX3243ECRHBR suits them because a single 3 V to 5.5 V rail powers both the charge pump and the logic side. The 5 mm square 32-VQFN package minimizes PCB footprint in a compact enclosure where every square millimetre counts. A dedicated shutdown input lets a portable design collapse the transceiver's supply current when the serial port is idle between measurement cycles, extending battery life. The commercial 0 °C to 70 °C grade matches typical indoor handheld operating environments.
Рекомендуется
Multi-Drop and Multi-Peripheral Serial Links
Equipment that must query several peripherals on one RS-232 port benefits from the MAX3243ECRHBR's five receivers, which can monitor acknowledge, ready, and fault lines from different devices in parallel while three outputs drive request lines. Because each receiver tolerates a wide signal common-mode range, marginal levels from long cables or weakly terminated networks are still recognized correctly. Designers should note that the drivers are not designed for long unloaded daisy-chain runs at high data rates; keep the 500 kbps ceiling in mind when laying out multi-drop wiring. For truly multi-drop networks, an RS-485 transceiver is the more appropriate architecture.
Рекомендуется
Security and Access Control Equipment
Access control readers, intercoms, and camera control units expose RS-232 wiring to the building network and are frequently handled by installers, so connector-side ESD resilience matters. The MAX3243ECRHBR delivers ±15 kV HBM protection on the serial pins plus IEC 61000-4-2 air-gap and contact discharge immunity, which protects the receive threshold from damage during installation and servicing. The combination of three drivers and five receivers suits panels that read several door sensors while driving lock relays and display lines. The small VQFN footprint also allows the interface to sit next to a processor in compact wall-mounted enclosures where board length is restricted.
Рекомендуется
Сводка рекомендуемых товаров
Справочные инженерные данные для MAX3243ECRHBR — сравнение, рекомендации по проектированию и информация о соответствии.
Руководство по выбору
Сравнение с аналогами
| Параметр | Этот товар | MAX3243EIRHBRG4 | TRS3253EIRSMR | SP3243EUER-L/TR | SP3243EE-L | SP3243CT-L |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | MaxLinear, Inc. | MaxLinear, Inc. | MaxLinear, Inc. |
| Package | 32-VQFN (5 mm x 5 mm) | 32-VQFN (5 mm x 5 mm) - same | 32-VQFN - same | 32-QFN - same | 32-QFN - same | 32-QFN - same |
| Supply Voltage Range | 3 V to 5.5 V | 3 V to 5.5 V | 3 V to 5.5 V | 3 V to 5.5 V | 3 V to 5.5 V | 3 V to 5.5 V |
| Logic-Side Supply Architecture | Single 3 V to 5.5 V supply | Single 3 V to 5.5 V supply | Split supply pin for logic side | Single supply | Single supply | Single supply |
Ключевые отличия
- More receive channels than transmit channels in a compact square footprint (против TRS3253EIRSMR)
- Documented ±15 kV IEC 61000-4-2 air-gap and ±8 kV contact ESD ratings (против SP3243EUER-L/TR)
- 500 kbps data rate from a single 3 V to 5.5 V rail (против SP3243EE-L)
- Upgrade path within one footprint for wider temperature (против MAX3243EIRHBRG4)
Заметки по проектированию
Place the charge-pump flying capacitors immediately across the V+ and V- capacitor pins, keeping traces short and symmetrical, because long or mismatched loops increase charge-pump ripple and reduce receiver noise margin. Use the datasheet-recommended capacitor type and value, and place the 0.1 uF bypass capacitor on the logic-side supply pin directly at the package. Route the RS-232 driver outputs as a matched pair to the connector with a common ground return adjacent to them; keeping the ground return physically close to the signal conductors reduces radiated emissions and improves immunity to external noise.
Do not tie the logic-side ground to the RS-232 line-side ground at a single point near the connector if the cable may be routed between different buildings or ground potentials; loop current through the common ground can corrupt the receiver threshold. Also remember that the MAX3243ECRHBR is a single-supply part, so the RS-232 line-side bipolar levels are generated by the charge pump and do not require a separate negative supply rail. Finally, respect the 0 °C to 70 °C rating of the EC grade and step up to the industrial grade if the enclosure can exceed that range.
Estimated: the MAX3243ECRHBR dissipates charge-pump and driver power that scales with the number of active drivers and the data rate; with three drivers running at 500 kbps continuously and a 5 V supply, the internal dissipation is on the order of tens of milliwatts, so the 32-VQFN (5 mm x 5 mm) package needs no heatsink. The exposed pad under the VQFN should still be soldered to a ground pour per the package drawing for both thermal spreading and low-inductance return. Verify the land pattern and solder mask against the manufacturer package drawing rather than scaling a generic QFN footprint.
RS-232 drivers are edge-rate limited but can still radiate on long cables; keep the driver traces away from clock, crystal, and sensitive analog nets on the same board, and avoid running RS-232 traces adjacent to the logic-side UART lines. Where a metal enclosure or long external cable is involved, add a common-mode choke or ferrite close to the connector. If the system also contains a switching regulator, separate its power loop from the transceiver supply path and keep the logic-side bypass capacitor at the device to prevent conducted noise from coupling into the receiver thresholds.
Информация о соответствии
The MAX3243ECRHBR is a commercial-temperature (0 °C to 70 °C) grade and is not presented as AEC-Q100 qualified. RoHS, REACH, lead-free, and halogen-free statements are not stated in the product listings; check the manufacturer material declaration for the orderable code before committing to a compliance-controlled build.
