MAX3243EIRHBR - 500kbps RS-232 Transceiver | Texas Instruments
MPN： MAX3243EIRHBR ✓ 啟用中MAX3243EIRHBR 概覽
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.
直接替換替代品，適用於 MAX3243EIRHBR — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： MAX3243EIRHBR （相同外形與佔位） — 差異在於 Maximum Data Rate, Package.
TRS3243E
✅ 直接替換📋 參考替代品（不在目錄中）
ST3243ECTR-E
✅ 直接替換聯絡詢價
查看資料表 →ADM3232E
✅ 直接替換📋 參考替代品（不在目錄中）
SP3243E
✅ 直接替換📋 參考替代品（不在目錄中）
ISL3241EIRZ
✅ 直接替換📋 參考替代品（不在目錄中）
MAX3243EIRHBR 規格
| 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 |
| 封裝 | 32-VQFN, 5x5mm |
| 安裝類型 | Surface mount |
| Automotive Qualification | Not qualified |
MAX3243EIRHBR 32-vqfn, 5x5mm 腳位配置指南
MAX3243EIRHBR（32-vqfn, 5x5mm 封裝）的腳位配置。 腳位編號、功能與連接圖定義於製造商資料手冊中。請參閱該手冊以取得確切的封裝尺寸與焊接指引。
無詳細腳位定義資料： MAX3243EIRHBR.
請參閱 資料表 以查看完整腳位配置。
典型應用
MAX3243EIRHBR 適用於 6 應用s: 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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
推薦產品摘要
工程參考資料，適用於 MAX3243EIRHBR — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | 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 |
主要差異化特點
- Five receivers provide greater inbound channel capacity than a conventional one-driver, one-receiver RS-232 device. (對比TRS3243E)
- Supports a 500kbps data rate for higher-throughput RS-232 links than the 250kbps MAX3243 family member. (對比MAX3243)
- Connector-facing pins include clearly defined HBM and IEC61000-4-2 protection ratings. (對比ADM3232E)
設計說明
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.
合規資訊
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.
