MAX202IDE4 - 5V Dual RS-232 Transceiver | Texas Instruments
料号： MAX202IDE4 ✓ 量产中MAX202IDE4 概述
An RS-232 transceiver is an interface circuit that connects a logic-level UART, microcontroller, or data-processing system to a physical RS-232 port. Its transmitters convert low-voltage logic signals into RS-232-compatible levels, and its receivers convert bipolar serial data back into logic-level signals. Within the interface-IC hierarchy, the MAX202IDE4 is a dual RS-232 transceiver suitable for equipment requiring two communication channels without allocating separate driver and receiver ICs.
The principal operating characteristics include a 5 V supply, operation up to 120 kbit/s, ±15 kV ESD protection on the RS-232 bus pins, and external 0.1 µF charge-pump capacitors. According to the Texas Instruments datasheet, the bus-pin protection meets or exceeds TIA/EIA-232-F and ITU V.28 requirements. These features make the device appropriate for legacy serial ports, industrial control links, point-of-sale equipment, and service interfaces that still use RS-232.
The MAX202IDE4 uses a charge-pump architecture to generate the positive and negative voltage swings required for RS-232 transmission. Because the required voltage conversion is performed on-chip, the design uses fewer external signal components than a discrete transmitter and receiver implementation. The two transmitters and two receivers are independently organized, allowing one device to support two RS-232 channels while sharing a common supply and ground reference.
Typical applications include two-channel industrial equipment links, configuration and service ports on embedded systems, communications between a UART-equipped controller and an RS-232 peripheral, and legacy data-logger or test-system connections. The interface is most useful where the host logic operates from 5 V and the cable length, grounding, and protection strategy comply with RS-232 system-design practices.
Designers should place the charge-pump capacitors and interface-side bypass capacitor close to their associated pins, route the exposed board area according to the package guidance, and provide a solid ground path between the transceiver and connector. ESD protection does not eliminate the need for disciplined cable shielding, common-mode grounding, and connector selection. The MAX202IDE4 should not be treated as a replacement for RS-485, RS-422, or isolated communication interfaces.
This page consolidates the verified device identity, electrical characteristics, package information, drop-in candidates, comparison parameters, and practical interface-design guidance. It also distinguishes verified catalog parameters from specification fields that require confirmation from the manufacturer datasheet before a new PCB release or production qualification.
直接替换替代料： MAX202IDE4 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： MAX202IDE4 （相同外形与封装尺寸） ——差异在于 Maximum Data Rate, Product Type, Supply Voltage.
MAX202ESE
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
MAX202CSE+
✅ 直接替换 ⚠️ 规格未核验联系询价
查看数据手册 →MAX202CSAE
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
MAX202IDE4 规格参数
| Product Type | Dual RS-232 line driver/receiver |
| Number of Driver Channels | 2 channels |
| Number of Receiver Channels | 2 channels |
| 电源电压 | 5 V |
| Maximum Data Rate | 120 kbit/s |
| ESD Protection on Bus Pins | ±15 kV |
| ESD Test Model | Human-body model |
| Charge-Pump Capacitor | 0.1 µF external capacitor |
| RS-232 Standard Compliance | TIA/EIA-232-F and ITU V.28 |
| 工作温度范围 | -40 °C to +85 °C |
| 封装 | 16-pin SOIC |
| 安装类型 | Surface mount |
| Transceiver Configuration | 2/2 full-duplex RS-232 channels |
MAX202IDE4 16-pin soic 引脚配置指南
MAX202IDE4（16-pin soic 封装）的引脚配置。 引脚编号、功能和连接图在制造商数据手册中定义。请参阅该手册以了解确切的封装尺寸和焊接指南。
暂无详细引脚数据： MAX202IDE4.
请参阅 数据手册 以查看完整引脚配置。
典型应用
MAX202IDE4 适用于 6 应用s: Industrial equipment RS-232 service port, Legacy point-of-sale serial interface, Embedded controller RS-232 bridge, Data logger and test equipment communications, Two-channel equipment communications hub, Secure communications and surveillance equipment.
Industrial equipment RS-232 service port
The MAX202IDE4 fits a two-channel service interface in industrial equipment that retains an RS-232 connector for configuration, diagnostics, or field-service access. Its 5 V supply, operation to 120 kbit/s, and -40 °C to +85 °C rated range support equipment expected to operate beyond room temperature. The two integrated driver and receiver channels reduce the number of interface ICs, while ±15 kV human-body-model protection strengthens the connector-side pins against electrostatic discharge. Follow the manufacturer charge-pump layout with 0.1 µF capacitors close to the designated pins.
推荐
Legacy point-of-sale serial interface
The MAX202IDE4 can bridge a 5 V UART controller to a legacy point-of-sale or peripheral system using two RS-232 channels. Its 120 kbit/s capability exceeds the throughput required by many serial peripherals, while the integrated transmitter and receiver channels simplify bidirectional point-to-point links. The ±15 kV bus-pin ESD rating adds protection at an exposed connector, but cable routing, grounding, and shield termination remain important. Confirm the exact peripheral logic levels and connector pinout before finalizing the interface.
推荐
Embedded controller RS-232 bridge
The MAX202IDE4 is suitable between a 5 V embedded controller and external equipment that uses RS-232 rather than differential signaling. Two driver and two receiver channels permit full-duplex communication on one board, including command and response paths or two peripheral connections. At a maximum rate of 120 kbit/s, the device supports UART-based configuration and telemetry traffic. Its 16-pin SOIC package simplifies surface-mount assembly, and the 0.1 µF charge-pump capacitors should be positioned according to the manufacturer layout to preserve signal and startup behavior.
推荐
Data logger and test equipment communications
The MAX202IDE4 supports controller connections in data loggers, bench instruments, and automated test equipment that retain RS-232 command interfaces. A 120 kbit/s maximum data rate is suitable for short command and measurement-transfer links, and two channels can support separate instrument or status connections. The device’s ±15 kV human-body-model bus protection improves robustness in service environments, although a grounded shield and suitable connector are still required. Use the TIA/EIA-232-F and ITU V.28 circuit guidelines from the manufacturer datasheet when laying out the interface.
推荐
Two-channel equipment communications hub
The MAX202IDE4 can consolidate two RS-232 links onto a common 16-pin interface IC. Each direction has two dedicated channels, making the device suitable for equipment that communicates with two peripherals or requires separate transmit and receive routing. Operation at 5 V and up to 120 kbit/s supports many legacy control protocols, while the external charge-pump capacitors keep the implementation compact. Verify that both peripherals share a compatible ground reference and that their RS-232 levels and data rates do not exceed the device ratings.
推荐
Secure communications and surveillance equipment
The MAX202IDE4 can serve as a local control or maintenance link in communications and surveillance equipment that retains an RS-232 management port. The ±15 kV human-body-model ESD protection on the bus pins helps manage connector-borne electrostatic discharge, while the -40 °C to +85 °C operating range supports temperature-varied deployments. The 5 V architecture integrates readily with embedded control logic, and the 120 kbit/s rate suits command traffic. For installations with long cables or severe electrical transients, add appropriate surge protection and verify the grounding strategy.
推荐
推荐产品汇总
工程参考数据： MAX202IDE4 ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | MAX202ESE | MAX202CSE | MAX202CSAE |
|---|---|---|---|---|
| Package | 16-pin SOIC | 16-pin SOIC | 16-pin SOIC | 16-pin SOIC |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Device Type | Dual RS-232 line driver/receiver | Dual RS-232 line driver/receiver | Dual RS-232 line driver/receiver | Dual RS-232 line driver/receiver |
| Supply Voltage | 5 V | 5 V | 5 V | 5 V |
| Number of Drivers | 2 | 2 | 2 | 2 |
| Number of Receivers | 2 | 2 | 2 | 2 |
关键差异点
- Combines two complete RS-232 channels in one interface IC （对比 MAX202ESE)
- Supports operation to 120 kbit/s （对比 MAX202CSE)
- Provides ±15 kV human-body-model bus-pin ESD protection （对比 MAX202CSAE)
- Specified for -40 °C to +85 °C operation （对比 MAX202CSE)
设计说明
Place the 0.1 µF charge-pump and bypass capacitors directly beside the pins identified in the manufacturer typical-application circuit. Keep their ground returns short and use the specified capacitor type and voltage rating. Erroneous capacitor values, excessive lead lengths, or long return paths can degrade charge-pump operation and introduce noise into the interface. Confirm capacitor polarity and pin assignments against the manufacturer datasheet before releasing the PCB.
Do not treat the MAX202IDE4 as an RS-485 or RS-422 interface, and do not assume its logic-side pins connect directly to a 3.3 V UART. The verified device operates from 5 V, and its external charge-pump circuit and RS-232 levels are part of the complete interface. Also verify whether the connected peripheral uses true RS-232 or a nonstandard TTL/serial-console arrangement. A connector-compatible but electrically different serial link can cause damage or unreliable communication.
Route the protected RS-232 bus traces away from clocks, switching nodes, and sensitive analog inputs, and connect the transceiver ground to the connector-side equipment ground using a low-impedance path. Use twisted-pair cable and appropriate shield termination at the chassis boundary. The ±15 kV human-body-model ESD rating improves robustness but does not remove conducted noise or lightning surges, so additional surge protection may be required for long or outdoor cables.
Confirm the UART baud rate, cable length, and system grounding before treating the 120 kbit/s maximum as a guaranteed end-to-end operating rate. RS-232 is a point-to-point interface, and long unshielded cables can introduce noise, reflections, and common-mode errors that reduce practical reliability. The driver and receiver channels should use manufacturer-recommended interface wiring, and unused bus pins should be handled according to the device recommendations.
合规信息
The verified catalog descriptions identify the MAX202IDE4 as a 5 V dual RS-232 line driver/receiver with ±15 kV ESD protection and TIA/EIA-232-F and ITU V.28 performance. They do not state RoHS, REACH, lead-free, halogen-free, conflict-minerals, or automotive qualification status.
