XR34350ILTR - Multiprotocol RS-232/RS-485/RS-422 Transceiver | MaxLinear
部品番号: XR34350ILTR ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $6.85 | $6.85 |
| 10 | $6.18 | $61.80 |
| 100 | $5.48 | $548.00 |
| 500 | $4.92 | $2,460.00 |
| 1,000 | $4.41 | $4,410.00 |
XR34350ILTR 概要
An RS-485/RS-422 multi-protocol transceiver is a single-chip interface IC that allows one physical port to communicate over multiple serial standards by reconfiguring its drivers and receivers. This category sits within the broader family of serial transceivers (also known as line transceivers or bus transceivers), which are essential building blocks inside the interface ICs tier of a system. By consolidating three standards into one IC, multiprotocol transceivers reduce BOM count, save PCB area, and let a single hardware design talk to legacy RS-232 equipment, RS-485 multidrop buses, and RS-422 point-to-point links on demand.
Key features include 1 transmitter / 1 receiver (1Tx / 1Rx) in RS-485/RS-422 half or full duplex, full DB9-equivalent 3Tx / 5Rx support in RS-232 mode, a dedicated diagnostic loopback mode, integrated cable termination resistors, and wide output swing for robust signal margins. High-speed drivers reach 20 Mbps in RS-485/RS-422 and 1 Mbps in RS-232 mode. Four configuration pins select the active protocol at power-up with no external switching components required.
The architecture combines a charge-pump DC-DC converter (the four external capacitors double and invert the supply to generate the RS-232 driver rails) with differential line drivers and receivers. Wide output swing ensures compliance with RS-232 ±15 V signaling even when powered from 3.3 V rails, while the integrated termination resistors eliminate external RS-485 120 Ω bias networks on the bus.
Typical applications include multiprotocol industrial fieldbus gateways, point-of-sale (POS) terminals that must handshake with both legacy RS-232 peripherals and modern RS-485 instruments, telecom base station control ports, building automation controllers, and any embedded system that needs to bridge between RS-232, RS-422, and RS-422 segments on a single connector.
When designing with this part, place the four charge-pump capacitors as close to the C1–C4 pins as possible with low-ESR ceramic types, and keep the MODE/SHDN pins either tied or driven by GPIOs. Note that activating the integrated termination draws additional supply current; disable it when not in use to save power.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, helping engineers quickly compare multiprotocol transceiver options for industrial-grade serial designs.
ドロップイン代替品: XR34350ILTR — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
クイック比較ツール — 並列比較する代替部品を選択:
XR34350IL
✅ ドロップイン📋 参考代替品（カタログ未掲載）
XR34350ILTR-3
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
SP3010-04UTG
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MAX3162EEUP+
✅ ドロップイン📋 参考代替品（カタログ未掲載）
SP339EER1-L
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
XR34350ILTR 仕様
| 機能 | Multiprotocol transceiver (RS-232 / RS-485 / RS-422) |
| Protocols Supported | RS-232, RS-485, RS-422 |
| Number of Drivers / Receivers (RS-485/RS-422) | 1Tx / 1Rx (half or full duplex) |
| Number of Drivers / Receivers (RS-232) | 3Tx / 5Rx |
| Configuration Modes | 4 (per datasheet) |
| Supply Voltage (VCC) | 3.3 V ±5% or 5.0 V ±5% |
| RS-485 / RS-422 Data Rate | Up to 20 Mbps |
| RS-232 Data Rate | Up to 1 Mbps |
| Integrated Cable Termination | Yes (selectable) |
| Wide Output Swing | Yes (RS-232 ±15 V from 3.3 V supply) |
| External Charge Pump Capacitors | 4 × 0.1 µF (C1–C4) |
| Diagnostic Loopback Mode | Yes (dedicated) |
| パッケージ | 40-pin QFN (6x6 mm) |
| 実装タイプ | Surface Mount |
| RoHS ステータス | Compliant |
XR34350ILTR 40-pin qfn (6x6 mm) ピン配置ガイド
XR34350ILTR (40-pin qfn (6x6 mm) パッケージ) のピン配置。 ピン番号、機能、接続図はメーカーのデータシートで定義されています。正確なフットプリントとはんだ付けのガイドラインについては、データシートを参照してください。
詳細なピン配置データはありません: XR34350ILTR.
詳細は データシート をご参照ください。
主な用途
XR34350ILTR の用途: 6 件s: Multiprotocol Industrial Fieldbus Gateway, Point-of-Sale (POS) Terminal Serial Ports, Telecom Base Station Control Port, Building Automation Controller (BACnet / Modbus Bridge), Industrial PLC Communication Backplane, Test & Measurement Equipment Serial Interface.
Multiprotocol Industrial Fieldbus Gateway
The XR34350ILTR's triple-standard RS-232/RS-485/RS-422 support and 1Tx/1Rx (RS-485/RS-422) half- or full-duplex configuration make it a single-IC bridge between Modbus RTU (RS-485) master networks and legacy RS-232 service ports. Its 20 Mbps RS-485 throughput sustains high-speed fieldbus polling, while MODE-pin reconfiguration lets one hardware platform switch between industrial bus segments without relay-based switching. Integrated RS-485 termination eliminates external 120 Ω bias networks, and only four 0.1 µF charge-pump capacitors are required. Compared with discrete MAX232 + MAX485 implementations, the XR34350ILTR reduces BOM count by two ICs and shrinks PCB area by roughly 60 percent.
おすすめ
Point-of-Sale (POS) Terminal Serial Ports
POS terminals must interface with a mix of legacy RS-232 peripherals (barcode scanners, receipt printers, PIN pads) and modern RS-485 cash-drawer or scale networks. The XR34350ILTR supplies 3Tx/5Rx for full DB9 RS-232 connectivity while also providing RS-485 1Tx/1Rx for multidrop peripheral polling, all from a 3.3 V or 5 V rail. Wide output swing (±15 V) ensures compliance with strict RS-232 signaling even when the rest of the POS SoC runs from 3.3 V. The dedicated diagnostic loopback mode simplifies factory self-test and field-service diagnostics without an external loopback connector.
おすすめ
Telecom Base Station Control Port
Telecom base stations need a robust serial port for alarms, configuration, and tower-top equipment monitoring over long RS-422 point-to-point links or multidrop RS-485 sensor buses. The XR34350ILTR's 20 Mbps RS-422 throughput and integrated termination support long cable runs typical of cell-tower installations. Single 3.3 V supply operation aligns with the low-voltage rails already present on baseband cards, while the integrated charge pump delivers the ±15 V RS-232 rails when service technicians connect a laptop for CLI provisioning.
おすすめ
Building Automation Controller (BACnet / Modbus Bridge)
Building automation controllers must aggregate BACnet MS-TP (RS-485) traffic from HVAC controllers, VAV boxes, and lighting nodes while supporting RS-232 service interfaces. The XR34350ILTR lets a single QFN-40 footprint handle RS-485 trunk communication and RS-232 commissioning ports simultaneously, with MODE-pin reconfiguration triggered by the host MCU on the fly. Integrated cable termination reduces the external BOM for VAV boxes mounted above ceiling plenums where rework is costly. The 0 to 70 °C commercial operating range suits indoor enclosures.
おすすめ
Industrial PLC Communication Backplane
Compact industrial PLCs use multiprotocol serial to communicate with servo drives, sensors, and HMI panels over RS-422/485 while exposing an RS-232 debug/log port. The XR34350ILTR's 40-pin QFN (6x6 mm) footprint slots into PLC mainboards where board area is at a premium. The 20 Mbps RS-485 rate supports high-speed vendor-proprietary protocols used by servo amplifiers, while RS-232 3Tx/5Rx covers the full DB9 console-port signal set. Integrated charge pump eliminates the auxiliary ±12 V DC-DC converter typical of PLC designs.
おすすめ
Test & Measurement Equipment Serial Interface
Bench-top instruments (oscilloscopes, spectrum analyzers, programmable power supplies) commonly expose both RS-232 for legacy SCPI commands and RS-485 / RS-422 for ATE (Automatic Test Equipment) rack integration. The XR34350ILTR provides both interfaces in a single IC, allowing instrument designers to consolidate two separate transceiver sites into one multiprotocol device. Its dedicated diagnostic loopback mode enables board-level self-test during ATE calibration, and the 4 × 0.1 µF charge pump minimizes BOM cost for high-margin T&M products.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: XR34350ILTR — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | XR34350IL | XR34350ILTR-3 | MAX3162EEUP+ | SP339EER1-L | SP3010-04UTG |
|---|---|---|---|---|---|---|
| Brand | MaxLinear | MaxLinear | MaxLinear | Analog Devices | MaxLinear | Littelfuse |
| Package | 40-pin QFN (6x6 mm) | 40-pin QFN (6x6 mm) | 40-pin QFN (6x6 mm) | 40-pin QFN (6x6 mm) | 40-pin QFN (6x6 mm) | 40-pin QFN (6x6 mm) |
| Protocols Supported | RS-232 / RS-485 / RS-422 | RS-232 / RS-485 / RS-422 | RS-232 / RS-485 / RS-422 | RS-232 / RS-485 / RS-422 | RS-232 / RS-485 / RS-422 | ESD protection array (different function) |
| RS-485 Data Rate | 20 Mbps | 20 Mbps | 20 Mbps | 10 Mbps (-50%) | 0.5 Mbps (-97%) | N/A |
| Supply Voltage | 3.3 V or 5.0 V | 3.3 V or 5.0 V | 3.3 V or 5.0 V | 3.0 V to 5.5 V | 3.3 V or 5.0 V | N/A (protection device) |
| Integrated Termination | Yes (selectable) | Yes (selectable) | Yes (selectable) | No (external) | No (external) | N/A |
| Charge Pump Capacitors | 4 × 0.1 µF | 4 × 0.1 µF | 4 × 0.1 µF | 4 × 0.1 µF | 4 × 0.1 µF | N/A |
| RS-232 Drivers / Receivers | 3Tx / 5Rx | 3Tx / 5Rx | 3Tx / 5Rx | 2Tx / 2Rx | 3Tx / 5Rx | N/A |
| Unit Price @100 pcs (approx.) | $5.48 | ~$5.48 (same die) | ~$5.48 (same die) | $9.20 (premium tier) | ~$4.20 (older generation) | ~$1.10 (different function) |
主な差別化要因
- Triple-protocol (RS-232 + RS-485 + RS-422) integration with integrated cable termination （vs MAX3162EEUP+)
- Higher RS-485 data rate （vs SP339EER1-L)
- 4-mode configuration set with diagnostic loopback （vs XR34350IL)
設計ノート
Estimated: Place the four 0.1 µF charge-pump capacitors (C1–C4) within 3 mm of the C1–C4 pins to minimize supply-rail ripple that couples into RS-232 driver outputs. Use X7R 25 V-rated ceramic capacitors; route the C1+ / C2+ nodes away from high-speed digital lines. The exposed thermal pad of the QFN-40 package must be soldered to a ground plane that covers at least 30 percent of the package area - this provides both thermal relief and a low-impedance ground reference for the differential drivers.
Do not leave the MODE configuration pins floating; either tie them to VCC or GND through 100 kΩ pull resistors, or drive them with MCU GPIOs. Floating MODE pins may latch the device in an unintended protocol or undefined state at power-up. Also, the wide-output RS-232 drivers draw additional quiescent current when enabled - issue a software SHDN to drop IQ below 10 µA for battery-backed industrial applications.
For RS-485/RS-422 bus runs exceeding 10 meters, terminate both ends with 120 Ω resistors and use twisted-pair cable with 100 Ω nominal impedance. The XR34350ILTR's selectable internal termination can replace the far-end resistor when the part sits at the cable end, reducing the BOM count. Estimated: at 20 Mbps, total cable skew must stay below 5 ns to avoid bit errors - keep stub lengths under 50 mm when designing multidrop buses.
Estimated: At 5.0 V VCC with all RS-232 drivers active, the part draws approximately 25 mA; with all drivers in SHDN it drops below 10 µA. The four 0.1 µF charge-pump capacitors source the bulk of the charge-pump switching current, so use low-ESR parts (less than 50 mΩ at 1 MHz) to keep peak currents and VCC ripple within the ±5% supply tolerance. Bypass VCC with a 0.1 µF ceramic in parallel with a 1 µF tantalum or polymer, placed within 5 mm of the VCC pin.
コンプライアンス情報
RoHS compliant per MaxLinear product page. Not AEC-Q100 qualified - choose a Q100-listed part for automotive designs. Halogen-free status not stated in retrieved data.
