MAX3221EEAE+ - 250kbps RS-232 Transceiver | Analog Devices
MPN: MAX3221EEAE+ ✓ Hoạt độngMAX3221EEAE+ Tóm tắt
An RS-232 transceiver is an interface IC that converts a logic-level UART signal into RS-232 voltage levels and converts an incoming RS-232 signal back into CMOS-compatible logic. It belongs to the communication-interface hierarchy: RS-232 transceiver, line-driver and receiver interface, interface IC, and semiconductor. This bidirectional conversion allows a modern microcontroller or processor to communicate with legacy printers, industrial equipment, data terminals, and other RS-232 systems.
The MAX3221EEAE+ combines a 3.0V to 5.5V supply range with a maximum data rate of 250kbps. Its AutoShutdown feature reduces supply current to 1uA when the system is inactive, helping conserve power in handheld and battery-operated equipment. Enhanced ESD protection rated to 15kV adds protection for the physical RS-232 connector interface, where cables can introduce electrostatic discharge into the equipment.
The device uses a charge-pump-assisted interface architecture to generate the positive and negative voltages required by RS-232 while operating from a single low-voltage supply. One transmitter and one receiver support one complete bidirectional communication channel. The MAX3221 is the 16-pin member of the MAX3221E, MAX3223E, and MAX3243E interface family, while MAX3223E and MAX3243E provide additional driver or receiver channels for multi-port designs.
Typical uses include handheld test equipment, portable data-collection systems, industrial serial adapters, point-of-sale terminals, and equipment with a legacy RS-232 port. The 16-pin SSOP package is useful when a compact interface is required without adding a larger multi-channel transceiver. The combination of low-voltage operation, 250kbps performance, AutoShutdown, and 15kV ESD protection makes the part appropriate for portable equipment that must maintain reliable serial connectivity.
Designers should follow the manufacturer datasheet for capacitor selection, charge-pump layout, and RS-232 connector protection. Place the required charge-pump capacitors close to their associated pins, route the interface nets away from sensitive analog circuitry, and provide the specified bypass capacitance at the supply pins. The external RS-232 connector should also receive suitable protection appropriate to the cable length and environmental exposure.
This page combines manufacturer specifications, packaging information, practical interface-design guidance, and technically meaningful drop-in comparisons. These engineering details help shorten component selection and PCB-layout work while making the trade-offs among the MAX3221E grade and package-ordering options easier to assess.
Bộ thay thế dễ dàng lắp đặt cho MAX3221EEAE+ — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
MAX3221ECAE+
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MAX3221EEAE+T
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MAX3221EAE+T
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MAX3221EEAE+ Thông số kỹ thuật
| Product Type | RS-232 transceiver |
| Number of Drivers | 1 driver |
| Number of Receivers | 1 receiver |
| Supply Voltage Range | 3.0V to 5.5V |
| Maximum Data Rate | 250kbps |
| ESD Protection | ±15kV |
| AutoShutdown Supply Current | 1uA |
| Power-Saving Feature | Automatic shutdown and wake-up |
| Interface Standard | EIA/TIA-232 |
| Hộp | 16-pin SSOP |
| Kiểu lắp đặt | Surface mount |
| Manufacturer Document Revision | Rev. 10 |
Hướng dẫn cấu hình chân MAX3221EEAE+ 16-pin ssop
Cấu hình chân cho MAX3221EEAE+ (16-pin ssop gói). Số thứ tự chân, chức năng và sơ đồ kết nối được xác định trong tài liệu thông số kỹ thuật của nhà sản xuất. Tham khảo nó để biết footprint và hướng dẫn hàn chính xác.
Không có dữ liệu chân cụ thể sẵn có cho MAX3221EEAE+.
Tham khảo: tài liệu kỹ thuật cho cấu hình chân đầy đủ.
Ứng dụng tiêu biểu
MAX3221EEAE+ phù hợp cho 6 Áp dụngs: Portable RS-232 Test Equipment, Handheld Data Collectors, Industrial Serial Adapters, Point-of-Sale Terminals, Legacy Equipment Service Interfaces, Battery-Powered Embedded Controllers.
Portable RS-232 Test Equipment
The MAX3221EEAE+ fits portable test equipment that connects a low-voltage controller to a legacy RS-232 instrument. Its 3.0V-to-5.5V operating range supports 3.3V and 5V systems, while the 250kbps maximum data rate permits faster transfers than a basic low-speed RS-232 interface. AutoShutdown lowers supply current to 1uA when the link is inactive, helping preserve battery life between measurement sessions. The E-series device also provides ±15kV enhanced ESD protection on the external driver and receiver paths, which is valuable when users repeatedly attach cables to field instruments. Use one driver and one receiver for a standard bidirectional terminal link, and follow the manufacturer layout for the charge-pump capacitors.
Được đề xuất
Handheld Data Collectors
A handheld data collector can use the MAX3221EEAE+ to connect its controller to an external RS-232 terminal or peripheral without requiring a separate bipolar power supply. Operation from 3.0V to 5.5V aligns with common portable-electronics rails, and the automatic shutdown and wake-up behavior reduces the 1uA inactive supply current. When the equipment is used with service technicians, the ±15kV enhanced ESD rating helps protect the transceiver from electrostatic discharge entering through the accessory connector. The 16-pin SSOP package also conserves board area compared with a multi-channel transceiver. Keep the external connector away from sensitive sensor circuitry, use the specified charge-pump capacitors, and verify that the host UART supports the selected 250kbps data rate.
Được đề xuất
Industrial Serial Adapters
The MAX3221EEAE+ is appropriate for compact industrial serial adapters that add a legacy RS-232 port to a modern control system. Its 1-driver, 1-receiver configuration provides one complete bidirectional channel, while the 250kbps data rate supports faster command and status transfers than conventional slow serial links. The 3.0V-to-5.5V supply range simplifies integration with mixed industrial logic levels, and AutoShutdown can reduce consumption when no cable is connected. For equipment exposed to user-accessible cables, the E-series ±15kV ESD protection adds a useful layer of interface ruggedness. Follow the Analog Devices layout for charge-pump components and provide connector grounding appropriate to the enclosure and cable environment.
Được đề xuất
Point-of-Sale Terminals
The MAX3221EEAE+ can support a point-of-sale terminal that communicates with a service connector, printer, or legacy peripheral through RS-232. The device operates from 3.0V to 5.5V, making it suitable for systems using either common logic rails, and its 250kbps capability provides useful headroom for transactional commands and configuration transfer. Automatic shutdown and wake-up reduce current demand when the store equipment is idle, while the ±15kV enhanced ESD protection helps withstand charged cables encountered during installation and servicing. The single SSOP-16 package is compact for crowded terminal boards. Maintain separation between the protected RS-232 traces and display or power-converter circuitry, and follow the specified capacitor placement to preserve charge-pump performance.
Được đề xuất
Legacy Equipment Service Interfaces
The MAX3221EEAE+ provides a practical bridge between a modern service controller and an older RS-232-equipped instrument. A single bidirectional channel is sufficient for command transmission and status reception, while the maximum 250kbps rate enables efficient transfer of service logs and configuration blocks. Its 3.0V-to-5.5V operating range allows use beside contemporary embedded processors without a separate 5V-only interface. The E-series ±15kV enhanced ESD protection is particularly relevant in service environments where connected cables may carry electrostatic discharge. Automatic shutdown and wake-up reduce power use during idle service periods. Confirm signal levels and handshaking behavior in the target legacy equipment, and use the manufacturer pin and layout guidance for a dependable implementation.
Được đề xuất
Battery-Powered Embedded Controllers
A battery-powered embedded controller can use the MAX3221EEAE+ when a legacy RS-232 port is needed for configuration, diagnostics, or field updates. The low-voltage 3.0V-to-5.5V operating range avoids requiring a dedicated bipolar RS-232 supply, and automatic shutdown reduces supply current to 1uA while the interface is inactive. The 250kbps maximum rate allows firmware and diagnostic data to transfer efficiently, while the 16-pin SSOP package limits footprint pressure. The E-series ±15kV enhanced ESD protection improves resilience when the connector is exposed to charged cables or maintenance personnel. Select the capacitor values and placement from the Analog Devices datasheet, keep the charge-pump loop compact, and route RS-232 traces away from sensitive sensors and clock circuitry.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho MAX3221EEAE+ — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | MAX3221ECAE+ | MAX3221EEAE+T | MAX3221EAE+T |
|---|---|---|---|---|
| Package | SSOP-16 | SSOP-16 | SSOP-16 | SSOP-16 |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Product Type | 1-driver, 1-receiver RS-232 transceiver | 1-driver, 1-receiver RS-232 transceiver | 1-driver, 1-receiver RS-232 transceiver | 1-driver, 1-receiver RS-232 transceiver |
| Maximum Data Rate | 250kbps | 250kbps | 250kbps | up to 250kbps |
| Supply Voltage Range | 3.0V to 5.5V | 3.0V to 5.5V | 3.0V to 5.5V | 3.0V to 5.5V |
| Automatic Shutdown | Yes | Yes | Yes | Yes |
| Ordering Format | MAX3221EEAE+ | Grade C ordering code | Tape-and-reel ordering code | Non-E ordering code with tape-and-reel packing |
Bảo phân biệt quan trọng
- Combines a compact 16-pin interface with enhanced ESD protection (vsMAX3221EAE+T)
- Uses automatic shutdown for low-power portable designs (vsMAX3221ECAE+)
- Supports high-rate serial links in a 16-pin package (vsMAX3221ECAE+)
Ghi chú thiết kế
Place the charge-pump capacitors and supply bypass capacitors directly beside their associated MAX3221EEAE+ pins, keeping the connection loops short and the ground returns close to the device. The RS-232 driver and receiver pins should connect to the external connector through short, appropriately routed traces. Avoid placing sensitive analog or high-speed digital traces beneath the charge-pump region, and follow the component values and layout shown in the Analog Devices datasheet.
Do not treat MAX3221EEAE+ as a direct RS-485 or RS-422 interface. The MAX3221EEAE+ specifically implements EIA/TIA-232 levels through a driver and receiver pair. Confirm that the external equipment uses compatible bipolar RS-232 signaling, that ground is connected, and that the UART baud rate remains within the 250kbps maximum. Verify the complete ordering grade when enhanced ±15kV ESD protection is required.
AutoShutdown supports low-power operation by reducing supply current to 1uA when the interface is inactive. Design the host-side shutdown-control logic so the device can enter this state without leaving a transmitter output in an undefined condition. Confirm wake-up timing against the connected equipment and use the manufacturer timing characteristics when defining a system wake interval. The external connector may also require normal chassis and signal-ground handling independent of the internal low-power state.
Keep the RS-232 connector, protection network, and transceiver interface section away from switching power stages, high-current return paths, and sensitive sensor inputs. A connector-facing cable can introduce electrostatic discharge and conducted noise, so the MAX3221EEAE+'s ±15kV enhanced ESD protection should be treated as one part of a complete interface design rather than a replacement for enclosure shielding, grounding, or overvoltage protection. Validate the final arrangement with an EMC and ESD test plan appropriate to the product.
Thông tin tuân thủ
The family is not identified as an automotive-grade device. Exact RoHS, REACH, lead-free, halogen-free, and conflict-minerals declarations should be confirmed from the manufacturer documentation for the selected ordering code.
