MAX3221CUE+ 3V-5.5V RS-232 Transceiver | Analog Devices
部品番号: MAX3221CUE+ ✓ 生産中MAX3221CUE+ 概要
An RS-232 transceiver is an interface IC that translates between single-ended logic-level signals and the voltage-defined, bipolar signaling used by RS-232 equipment. In the transmit direction, the line driver converts logic-level data into an RS-232 signal; in the receive direction, the receiver converts the incoming RS-232 signal into a logic-level output. The dual charge-pump circuit supports the voltage translation required by the RS-232 standard without requiring a separate negative supply. The receiver enable pin gives the system designer a way to control whether the receiver is active, while AutoShutdown provides an additional power-management mechanism for ports that may be idle.
The key verified characteristics of the MAX3221CUE+ include its +3V to +5.5V supply range, 1 µA-class shutdown current as described by the manufacturer family documentation, RS-232 transceiver operation, and its 16-pin TSSOP package. The Newark distributor listing identifies the part as an RS-232 transceiver with 120 Kbps signaling and a 70°C operating-temperature listing. The Analog Devices product page identifies the MAX3221 family as production and lists a starting list price of $2.52. Additional operating, electrical, and environmental details are available in the manufacturer datasheet and should be confirmed against the specific ordering code before design release.
Typical uses include legacy serial-port equipment, industrial control links, data-acquisition equipment, and embedded systems that require a compact RS-232 port. The MAX3221CUE+ can be used when a design needs a low-voltage digital supply while retaining conventional RS-232 signaling at the connector. Its single-driver and single-receiver organization is appropriate for point-to-point links rather than multi-drop RS-232 networks. The dedicated receiver enable and AutoShutdown functions are useful in systems where the interface must remain available without continuously powering the complete driver and receiver circuitry.
The primary design consideration is verifying the exact pinout, capacitor values, and signal-termination requirements from the MAX3221 manufacturer datasheet. Charge-pump capacitors must be placed close to their associated pins, and the RS-232 connector-side circuit should be designed for the voltage and ESD requirements of the application. The MAX3221CUE+ is appropriate when the required interface is one driver and one receiver in a 16-pin TSSOP footprint; designers needing multiple drivers or receivers should select a larger RS-232 transceiver family instead.
This page combines manufacturer family information, distributor pricing, verified cross-reference results, application guidance, and design cautions to support practical sourcing and comparison of the MAX3221CUE+ rather than reproducing only the basic distributor description.
ドロップイン代替品: MAX3221CUE+ — 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。
MAX3221ECPWR
✅ ドロップイン📋 参考代替品（カタログ未掲載）
TRSF3221EIPWR
✅ ドロップイン📋 参考代替品（カタログ未掲載）
TRS3221ECPWR
✅ ドロップイン📋 参考代替品（カタログ未掲載）
ICL3221CVZ
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MAX3227ECUE+
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MAX3221CUE+ 仕様
| Product Type | RS-232 transceiver |
| Supply Voltage Range | +3V to +5.5V |
| Number of Drivers | 1 |
| Number of Receivers | 1 |
| Receiver Enable | Dedicated enable input |
| AutoShutdown Supply Current | 1 µA |
| データレート | 120 Kbps |
| Interface Standard | EIA/TIA-232 and V.28/V.24 |
| Charge Pump | Dual on-board charge-pump circuit |
| パッケージ | 16-pin TSSOP |
| 動作温度 | 70°C maximum listed rating |
| Manufacturer Production Status | Production |
| AEC-Q100 Qualification | not_applicable |
MAX3221CUE+ 16-pin tssop ピン配置ガイド
MAX3221CUE+ (16-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: MAX3221CUE+.
詳細は データシート をご参照ください。
主な用途
MAX3221CUE+ の用途: 6 件s: Industrial Serial Port, Data Acquisition Equipment, Embedded Control Console, Legacy Serial Adapter, Instrumentation Interface, Security and Access Equipment.
Industrial Serial Port
The MAX3221CUE+ fits a point-to-point industrial serial connection requiring one RS-232 transmitter and one receiver. Its +3V to +5.5V supply range allows it to operate from 3.3V or 5V control electronics, while the dual charge-pump circuit supplies the required bipolar RS-232 signaling without a separate negative rail. The 120 Kbps data-rate listing supports common legacy and industrial control links. The main design trade-off is the listed 70°C maximum operating temperature, which may require a higher-temperature alternative and broader surge protection for harsh installations.
おすすめ
Data Acquisition Equipment
The MAX3221CUE+ can connect a controller or instrument to a legacy RS-232 data-acquisition device when the system needs a compact single-channel interface. Its 16-pin TSSOP package leaves board area for measurement circuitry, and operation from +3V to +5.5V supports both 3.3V and 5V instrument architectures. AutoShutdown can reduce consumption when no valid receiver activity is present, although instrument firmware must tolerate the resulting wake-up behavior. The interface should include appropriate protection at an external connector where cables leave the enclosure.
おすすめ
Embedded Control Console
The MAX3221CUE+ is suitable for connecting an embedded controller to a service console or configuration port over RS-232. Its one-driver and one-receiver organization matches a typical point-to-point console link, while the receiver enable pin provides direct control over receiver state. The +3V operation is useful for systems based on 3.3V processors, while the on-board dual charge-pump circuit avoids a separate negative supply. Firmware should account for AutoShutdown wake-up timing, and the connector circuit should provide ESD and surge protection appropriate to the cable environment.
おすすめ
Legacy Serial Adapter
The MAX3221CUE+ can be used in a compact USB-to-RS-232 or processor-to-RS-232 adapter that must interoperate with established equipment. The verified +3V to +5.5V range allows the adapter to share power with modern digital logic, and the 120 Kbps listing covers common serial-port traffic. Unlike a legacy MAX232-class solution requiring a dedicated 5 V rail, this device can operate at 3.3 V, but the exact ordering suffix, AutoShutdown behavior, and temperature rating should be checked against the enclosure environment. External protection is still needed for user-accessible connectors.
おすすめ
Instrumentation Interface
The MAX3221CUE+ can bridge low-voltage digital control logic to RS-232-controlled laboratory or process instrumentation. Its dedicated receiver enable and AutoShutdown functions support systems in which the interface is enabled selectively, reducing unnecessary active-state consumption. The single-channel topology is appropriate when the instrument exposes one receive and one transmit RS-232 line. Designers must follow the manufacturer’s charge-pump capacitor recommendations, isolate the connector-side interface from sensitive analog sections, and verify the 120 Kbps rate against the instrument protocol.
おすすめ
Security and Access Equipment
The MAX3221CUE+ can support a compact RS-232 link in access-control or surveillance equipment that retains a legacy service or configuration port. Its 16-pin TSSOP footprint is useful where PCB space is constrained, and +3V to +5.5V operation aligns with modern embedded systems. AutoShutdown may reduce power use when the service port is idle, while the receiver enable allows a host to control signal reception. Because such equipment may expose connectors to users and long cables, the design should add suitable external ESD and surge protection and verify operating-temperature requirements.
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: MAX3221CUE+ — 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 | MAX3221ECPWR | TRSF3221EIPWR | TRS3221ECPWR | ICL3221CVZ | MAX3227ECUE+ |
|---|---|---|---|---|---|---|
| Package | 16-pin TSSOP | 16-pin TSSOP | 16-pin TSSOP | 16-pin TSSOP | 16-pin TSSOP | 16-pin TSSOP |
| Brand | Analog Devices | Analog Devices | Texas Instruments | Texas Instruments | Renesas Electronics | Analog Devices |
| Product Type | RS-232 transceiver | RS-232 transceiver | RS-232 driver/receiver | RS-232 transceiver | RS-232 transmitter/receiver | RS-232 transceiver family member |
主な差別化要因
- Lower-voltage RS-232 operation （vs MAX3221CUE+T)
- Very low shutdown consumption （vs MAX3232CDBG4)
- Single-channel footprint with dedicated receiver enable （vs MAX3227ECUE+)
- Production status and manufacturer documentation （vs ICL3221CVZ)
設計ノート
Place the MAX3221 charge-pump capacitors directly beside their associated IC pins with short traces and a solid ground connection. The verified excerpts do not provide the required capacitor values, so use the manufacturer datasheet rather than substituting generic values. Preserve the device’s recommended pin-1 orientation and verify the 16-pin TSSOP footprint against the selected MAX3221 ordering code before PCB release.
Do not treat a matching TSSOP package as proof of drop-in compatibility. Before substituting an alternative, compare driver and receiver pin functions, receiver-enable polarity, charge-pump connections, logic thresholds, shutdown timing, and supply requirements. The alternatives included here came from verified web comparison results, but their unqualified electrical details were not supplied, so a manufacturer pin-to-pin and parametric review remains required.
AutoShutdown can reduce the MAX3221 family’s shutdown current to 1 µA according to the manufacturer family material, but system firmware must tolerate wake-up timing and signal-detection behavior. The receiver enable remains useful for direct control. Do not design shutdown assumptions around the distributor snippet alone; confirm activation thresholds, timing, and operating conditions in the MAX3221 datasheet.
Keep RS-232 connector-side traces away from sensitive analog and high-speed digital paths, provide a continuous ground reference, and place any required protection devices close to the connector. The MAX3221 includes an on-board dual charge-pump circuit, but internal ESD protection does not replace external protection for user-accessible or long cables. Verify the selected device’s exact ESD rating and connector requirements in the manufacturer datasheet.
コンプライアンス情報
The supplied excerpts do not provide definitive RoHS, REACH, lead-free, halogen-free, or conflict-minerals declarations for the exact MAX3221CUE+ ordering code. AEC-Q100 is marked not_applicable because this is an RS-232 interface IC rather than an automotive-qualified device.