MAX3386ECUP+ - 3/2 RS-232 Transceiver, 250kbps | Analog Devices
部品番号: MAX3386ECUP+ ✓ 生産中MAX3386ECUP+ 概要
An RS-232 transceiver is an interface IC that bridges a low-voltage digital logic system and a single-ended, bipolar RS-232 link. It belongs to the communications-interface hierarchy, combining transmitter and receiver functions with the voltage conversion and protection required for unbalanced serial communication. The MAX3386ECUP+ also uses charge-pump circuitry to generate the positive and negative voltages required by RS-232 output levels from a single low-voltage supply.
The MAX3386ECUP+ supports a 3.0V to 5.5V supply and operates at data rates up to 250kbps while maintaining RS-232-compliant output levels. Its dual charge pump requires four 0.1uF capacitors for operation from a 3.3V supply. The three-driver, two-receiver arrangement suits equipment with several outbound serial channels and fewer inbound channels, while enhanced electrostatic-discharge protection improves robustness in exposed cable-connected systems.
The low-dropout transmitter output stage enables true RS-232 performance without requiring a 5V-only power rail, making the device useful in battery-powered and portable systems. The manufacturer describes the MAX3386E family as a low-power communications interface with high data-rate capability and enhanced ESD protection. Charge-pump switching and transmitter edge behavior should be considered when the serial link operates next to sensitive analog circuitry.
Typical uses include RS-232 ports in personal digital assistants and cellular phones, diagnostic and programming interfaces, industrial equipment, point-of-sale terminals, and embedded serial adapters. Its 250kbps maximum rate provides useful margin above common asynchronous serial communication rates, while the compact 20-pin TSSOP package supports space-constrained portable products.
Design the charge-pump capacitor network for the shortest practical connection to the supply and ground pins. Confirm the connector-side protection strategy and cable routing because the integrated ESD protection does not eliminate the need for correct board layout and system-level grounding. Verify signal levels and timing against the manufacturer datasheet before replacing a multi-transceiver interface.
This product page combines manufacturer specifications, pin-compatible alternatives, application guidance, and practical interface-design notes. It helps engineers compare protocol capability, package compatibility, protection, and implementation constraints before selecting a compact RS-232 transceiver.
ドロップイン代替品: MAX3386ECUP+ — 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。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: MAX3386ECUP+ （同一形状・フットプリント） — 相違点: ESD Protection, Product Type.
MAX3386EEUP+
✅ ドロップイン価格はお問い合わせください
データシートを見る →TRS3386EIPW
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MAX3386ECPWG4
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MAX3386ECUP+ 仕様
| Product Type | 3/2 RS-232 transceiver |
| Number of Transmitters | 3 |
| Number of Receivers | 2 |
| Supply Voltage Range | 3.0V to 5.5V |
| Maximum Data Rate | 250kbps |
| Communication Standard | EIA/TIA-232, V.28, and V.24 |
| ESD Protection | ±25kV |
| Charge Pump Capacitors | 4 × 0.1uF |
| Transmitter Architecture | Proprietary low-dropout output stage |
| Charge Pump Architecture | Dual charge pump |
| パッケージ | 20-pin TSSOP |
| 実装タイプ | Surface mount |
| Transceiver Configuration | 3 transmitters and 2 receivers |
MAX3386ECUP+ 20-pin tssop ピン配置ガイド
MAX3386ECUP+ (20-pin tssop 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: MAX3386ECUP+.
詳細は データシート をご参照ください。
主な用途
MAX3386ECUP+ の用途: 6 件s: Portable RS-232 Diagnostic Port, Industrial Controller Serial Interface, Data Acquisition and Test Equipment, Programmer and Debug Adapter, Point-of-Sale Terminal, Cellular and PDA Equipment.
Portable RS-232 Diagnostic Port
The MAX3386ECUP+ fits portable diagnostic equipment that needs multiple serial outputs and fewer receive channels. Its 3.0V to 5.5V operating range allows operation from a 3.3V system rail, while the low-dropout transmitter stage produces RS-232-compatible levels without a separate 5V supply. The dual charge pump requires four 0.1uF capacitors, keeping the support network compact. Its 250kbps maximum data rate provides sufficient margin for common asynchronous diagnostic protocols. Place the charge-pump capacitors close to the device and route the connector-side signals away from sensitive analog circuitry.
おすすめ
Industrial Controller Serial Interface
The MAX3386ECUP+ can connect an embedded controller to industrial RS-232 equipment through its three transmitters and two receivers. A 3.3V industrial controller can operate the transceiver without requiring a separate 5V rail, while the 250kbps rate covers many legacy serial-control links. The TSSOP-20 package preserves board area, and the integrated enhanced ESD protection improves robustness near external cables. Engineers should verify ground continuity, cable length, connector selection, and logic levels before deployment because these parameters determine whether the physical RS-232 link remains reliable.
おすすめ
Data Acquisition and Test Equipment
The MAX3386ECUP+ is suitable for test and measurement equipment that exchanges commands and results over RS-232. Three transmitters allow several instrument outputs to share the interface package, while two receivers support inbound status or measurement channels. Its supply range of 3.0V to 5.5V permits use with modern mixed-voltage control boards, and the maximum 250kbps rate is useful for command traffic and compact data transfers. Keep the serial traces short and controlled, provide a stable reference ground, and validate receiver thresholds at the system level rather than relying only on logic-level compatibility.
おすすめ
Programmer and Debug Adapter
The MAX3386ECUP+ can implement the host side of an RS-232 programming or debug adapter for embedded equipment. Its low-voltage supply operation is useful for compact programmers powered from USB-derived 3.3V rails, and the three transmitters provide flexibility for separate control, handshake, and status signals. The two receivers can return target acknowledgements or fault information. The 250kbps capability is more than adequate for many configuration protocols, but the host software must match the UART baud rate, framing, and handshake sequence. External protection at an exposed connector should be evaluated for the target installation environment.
おすすめ
Point-of-Sale Terminal
The MAX3386ECUP+ supports compact point-of-sale equipment that communicates with peripherals through legacy RS-232 connections. Three transmitter channels can drive separate command, status, or peripheral-control lines, while two receiver channels handle responses from the connected equipment. Its 3.0V to 5.5V range supports common embedded processor rails, and the TSSOP-20 package reduces footprint compared with larger discrete-interface implementations. In a point-of-sale system, maintain a low-impedance common ground between boards and use the transceiver enable controls to prevent unused outputs from driving an inactive peripheral. Confirm the peripheral voltage and connector wiring before enabling the interface.
おすすめ
Cellular and PDA Equipment
The MAX3386ECUP+ was designed for space-constrained PDA and cellular equipment that needs an RS-232-compatible interface from a low-voltage supply. Its 20-pin TSSOP package and three-transmitter, two-receiver configuration support multiple serial functions without the area required by discrete level translators. Operating from 3.3V with four 0.1uF charge-pump capacitors reduces power-supply complexity, and the 250kbps rate covers common control links. When integrating it into a battery-powered product, account for connector exposure, cable transients, signal return paths, and the selected UART's tolerance for the transceiver's propagation timing.
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: MAX3386ECUP+ — 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 | MAX3386EEUP+ | TRS3386EIPW | MAX3386ECPWG4 |
|---|---|---|---|---|
| Package | 20-pin TSSOP | 20-pin TSSOP | 20-pin TSSOP | 20-pin TSSOP |
| Brand | Analog Devices | Analog Devices | Texas Instruments | Analog Devices |
| Device Type | 3/2 RS-232 transceiver | 3/2 RS-232 transceiver | 3V RS-232 transceiver | 3/2 RS-232 transceiver |
主な差別化要因
- Operates directly from a 3.3V system rail （vs TRS3386EIPW)
- High serial throughput for a compact transceiver （vs MAX3386EEUP+)
- Documented charge-pump implementation （vs MAX3386ECPWG4)
設計ノート
Place the four 0.1uF charge-pump capacitors close to their specified device pins, using the shortest possible supply and ground connections. Keep the loop area small because the dual charge pump switches current through these capacitors. Follow the manufacturer datasheet layout for capacitor placement rather than substituting generic bulk-capacitor positions, and preserve a low-impedance ground path beneath and around the transceiver.
Treat the RS-232 outputs as potentially noisy high-voltage signals even though the device operates from a low-voltage supply. Route driver outputs directly toward the connector, keep them away from precision analog and high-speed clock traces, and avoid sharing narrow return paths with sensitive signals. Use the receiver enable functions to disable unused drivers when they are not connected to an active peripheral, reducing unnecessary transitions on the cable side.
Do not infer pin-compatible replacement solely from the 20-pin TSSOP package. Before substituting the MAX3386EEUP+, TRS3386EIPW, or MAX3386ECPWG4, compare supply range, temperature grade, ESD rating, driver and receiver enable logic, propagation delay, and charge-pump requirements. Also verify that the UART protocol and baud rate remain compatible, because an RS-232 transceiver preserves electrical signaling but does not translate the data protocol.
Estimated: the charge-pump network requires four 0.1uF capacitors when the device operates from 3.3V. Confirm the capacitor voltage rating, effective capacitance across temperature and tolerance, and the regulator's ability to handle the charge-pump current ripple. If multiple transceiver channels can activate simultaneously, evaluate the combined converter and interface power budget rather than sizing the supply from a single inactive-channel condition.
コンプライアンス情報
No definitive compliance declarations were established from the accessible manufacturer and distributor information. Confirm RoHS, REACH, lead-free, halogen-free, and conflict-minerals status against the current manufacturer product documentation before release.