MAX202CD - 5V Dual RS-232 Transceiver | Texas Instruments
料号： MAX202CD ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $1.1781 | $1.18 |
| 10 | $1.1781 | $11.78 |
| 100 | $1.1781 | $117.81 |
| 500 | $1.1781 | $589.05 |
| 1,000 | $1.1781 | $1,178.10 |
MAX202CD 概述
An RS-232 transceiver combines line-driver and line-receiver functions with the voltage-level conversion required to connect low-voltage digital logic to a ±RS-232 communications link. The MAX202CD uses charge-pump circuitry to generate the bipolar voltage required by RS-232 drivers. Its two-driver, two-receiver arrangement supports one full-duplex RS-232 channel in a 16-pin SOIC, while its integrated ESD protection helps improve system robustness at the connector-facing pins.
Key features include a 4.5 V to 5.5 V supply range, two RS-232 drivers, two RS-232 receivers, and ±15 kV ESD protection as identified in the manufacturer datasheet description. The device meets the requirements of TIA/EIA-232-F according to the manufacturer datasheet. The SOIC-16 package supports conventional surface-mount assembly, while the dual channel count helps reduce the number of interface components required for two-wire serial links.
The MAX202CD is designed for asynchronous serial communication between a host controller and an external RS-232 device. Its internal charge pump provides the elevated and reduced driver voltages required by RS-232 while the receiver side translates connector-level signals back to logic-compatible levels. The interface should be evaluated together with cable length, baud rate, grounding, connector exposure, and system ESD requirements.
Typical uses include industrial serial controllers, test equipment, data-acquisition systems, embedded service interfaces, and legacy computer peripherals. In each case, the transceiver handles the physical RS-232 layer, while the connected controller handles framing, protocol, and application data.
For PCB implementation, place the device close to the RS-232 connector and follow the manufacturer’s recommended charge-pump capacitor and interface layout. Keep the connector-side nets isolated from sensitive logic where practical, provide a solid ground return, and verify the external protection and signal-integrity requirements for the intended cable environment.
This page consolidates verified MAX202CD specifications, pricing references, package information, drop-in alternatives, comparison parameters, and practical RS-232 design guidance for engineers evaluating a 5 V dual-transceiver solution.
直接替换替代料： MAX202CD ——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： MAX202CD （相同外形与封装尺寸） ——差异在于 Mounting Type, Package, Channel Configuration, ESD Protection, Operating Temperature Range.
快速对比工具——选择替代料号进行并排对比：
MAX202CDR
✅ 直接替换📋 参考替代料（不在目录中）
MAX202CD 规格参数
| Product Type | Dual RS-232 line driver and receiver |
| Supply Voltage Range | 4.5 V to 5.5 V |
| Number of Drivers | 2 |
| Number of Receivers | 2 |
| ESD Protection | ±15 kV pin-to-pin on serial-port connection pins, including ground |
| RS-232 Standard | TIA/EIA-232-F |
| Interface Function | Electrical interface between asynchronous communication controller and serial-port connector |
| 封装 | 16-pin SOIC |
| 安装类型 | Surface mount |
| Charge-Pump Circuit | Dual charge-pump circuit |
| Channel Configuration | 2 drivers and 2 receivers |
MAX202CD 16-pin soic 引脚配置指南
MAX202CD（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： MAX202CD.
请参阅 数据手册 以查看完整引脚配置。
典型应用
MAX202CD 适用于 6 应用s: Industrial Serial Controller, Embedded Data-Acquisition System, Test and Measurement Instrument, Legacy Computer Peripheral, RS-232 Service Port, Communication Controller Interface.
Industrial Serial Controller
The MAX202CD fits industrial serial controllers that need a compact two-driver, two-receiver RS-232 interface at 4.5 V to 5.5 V. Place the transceiver between the controller UART and an external DB9 or equivalent connector, while the controller handles framing and protocol. The 16-pin SOIC package simplifies routing in a conventional industrial control board. The ±15 kV ESD protection on serial-port connection pins adds useful robustness when the cable is longer than the enclosure and may be exposed to electrostatic discharge. Designers should still provide proper grounding, connector design, and system-level surge protection.
推荐
Embedded Data-Acquisition System
Use the MAX202CD when an embedded controller must communicate with external laboratory or process equipment through a legacy RS-232 port. Its two transmitters and two receivers support bidirectional serial signaling, while the 5 V supply range aligns with many embedded logic rails. The charge-pump implementation provides the RS-232 voltage conversion internally, reducing the number of external level-shifting stages. In a data-acquisition chassis, keep the RS-232 traces away from sensitive analog inputs and route the connector ground carefully to minimize ground-loop and cable-induced noise problems.
推荐
Test and Measurement Instrument
The MAX202CD is appropriate for test instruments that expose an RS-232 service port for configuration, logging, or calibration commands. A 16-pin SOIC allows the interface to be placed near the rear-panel connector, shortening the exposed RS-232 traces and improving assembly practicality. The two-driver, two-receiver arrangement supports transmit and receive paths for a controller-based instrument. Maintain a controlled ground reference between the instrument and connected equipment, and verify the driver and receiver characteristics in the official datasheet for the intended baud rate and cable length.
推荐
Legacy Computer Peripheral
The MAX202CD can provide the physical interface between a modern controller and a legacy RS-232 peripheral, such as a printer, terminal, or service adapter. Its 4.5 V to 5.5 V operating range is suitable for a 5 V logic environment, and the integrated charge pump avoids a separate external RS-232 voltage-generation circuit. Confirm the peripheral’s pin assignment because TXD and RXD wiring at the connector determines whether straight-through or crossed wiring is required. Use the transceiver’s connector-side ESD capability as part of the enclosure and cable protection strategy.
推荐
RS-232 Service Port
A MAX202CD-based service port is useful in embedded boards, power systems, and equipment where field technicians need a wired diagnostic connection. The dual channel count provides flexibility for transmitting status data and receiving commands, while the SOIC-16 footprint supports automated surface-mount assembly. The interface should be enabled only when needed if power consumption matters, and the logic firmware should handle framing and error recovery. For long or electrically noisy service cables, validate the complete system against the receiver thresholds and the target baud rate.
推荐
Communication Controller Interface
The MAX202CD is well suited to connecting an asynchronous communication controller to a serial-port connector when the board uses 5 V logic. Its two line drivers and two receivers provide the basic full-duplex channel arrangement, and the integrated dual charge pump handles the bipolar RS-232 signaling. Place bypass and charge-pump capacitors according to the manufacturer’s recommended values and layout. Avoid assuming that all similarly labeled RS-232 ICs are interchangeable; verify pinout, supply voltage, logic compatibility, and external capacitor connections before substitution.
推荐
推荐产品汇总
工程参考数据： MAX202CD ——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 | MAX202CDR | MAX202CPWR |
|---|---|---|---|
| Package | SOIC-16 | SOIC-16 | TSSOP-16 |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments |
| Supply Voltage | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V |
| Drivers | 2 | 2 | 2 |
| Receivers | 2 | 2 | 2 |
| Charge-Pump Circuit | Dual | Dual | Dual |
| Ordering Package | Tube | Tape and reel | Tape and reel |
关键差异点
- Integrated dual RS-232 channel （对比 MAX202CDR)
- Connector-side ESD protection （对比 MAX202CDR)
- 5 V system compatibility （对比 MAX202CPWR)
设计说明
Place the MAX202CD close to the RS-232 connector and route connector-side driver, receiver, and ground nets as a compact interface group. Keep the charge-pump capacitor connections short and follow the capacitor values and placement shown in the official Texas Instruments datasheet. This minimizes exposed high-voltage switching-node effects near sensitive logic and reduces the chance that connector transients couple into unrelated board areas.
Do not treat every device described as an RS-232 transceiver as a drop-in replacement. Verify the exact pin names, supply range, driver and receiver counts, logic thresholds, charge-pump capacitor pins, package dimensions, and maximum data rate. In particular, MAX202CPWR is listed with a TSSOP-16 package in the verified cross-reference result, so it cannot be assumed to replace a MAX202CD SOIC-16 footprint without PCB redesign.
RS-232 cable faults and connector transients can inject noise even when the logic side is quiet. Maintain a continuous ground reference between the equipment and connected device, use a suitable connector shield strategy, and keep the external cable away from high-current switching nodes. The integrated ±15 kV ESD protection helps at the specified serial-port pins but does not eliminate the need for enclosure, grounding, and system-level protection.
合规信息
The supplied verified data does not provide explicit RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declarations for MAX202CD. These fields remain unknown rather than inferred.