MAX202CPW - Dual RS-232 Transceiver | Texas Instruments
料号： MAX202CPW ✓ 量产中MAX202CPW 概述
An RS-232 transceiver is an interface IC that combines differential line-driver and receiver functions with the voltage conversion required by the RS-232 standard. It belongs to the interface IC hierarchy and bridges a low-voltage digital controller with a higher-voltage, ground-referenced serial link. Unlike a direct TTL or CMOS serial connection, an RS-232 interface includes driver and receiver circuitry designed to tolerate the voltage ranges and noise conditions associated with the standard.
Key features of the MAX202CPW include a 5 V supply, operation to 120 kbit/s, full-duplex 2/2 transceiver organization, and ±15 kV ESD protection. The four external 0.1 µF capacitors support the device's charge-pump function. Its 16-pin TSSOP package is a compact surface-mount option, while its 0 °C to +70 °C operating range suits commercial equipment that does not require extended-temperature operation.
Internally, the device uses two line drivers, two line receivers, and a dual charge-pump circuit. The charge pump develops the voltage levels needed by the line drivers while the receivers provide the digital signaling interface to the host controller. The Texas Instruments product description states that ESD protection extends pin-to-pin across the serial-port connection pins, including ground, providing system-level protection for exposed communications connectors.
Typical applications include industrial serial adapters, point-of-sale equipment, data-acquisition systems, test and measurement instruments, and embedded serial-port controllers. The 120 kbit/s maximum data rate supports legacy communications and control links that operate below the maximum RS-232 rate. Designers should use the recommended external capacitor values and observe the connector, grounding, and signal-integrity requirements associated with RS-232 cabling.
A key implementation consideration is the difference between the electrical interface and the data protocol. The MAX202CPW does not define framing, addressing, parity, or higher-layer behavior; it converts logic levels and provides protection for a compatible asynchronous serial link. Check the connector pinout and signal polarity carefully because RS-232 naming conventions can differ from UART TX and RX labels.
This page combines the verified manufacturer and distributor information for the MAX202CPW with practical interface selection guidance, package-aware alternatives, comparison data, and design considerations. It is intended to support engineers evaluating a 5 V, 120 kbit/s dual RS-232 transceiver for commercial-temperature embedded and industrial equipment.
直接替换替代料： MAX202CPW ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
MAX202IPWR
✅ 直接替换📋 参考替代料（不在目录中）
MAX202EPW+
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
MAX202APW+
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
HIN202CP
✅ 直接替换📋 参考替代料（不在目录中）
ST232C
✅ 直接替换📋 参考替代料（不在目录中）
MAX202CPW 规格参数
| Product Type | Dual RS-232 line driver/receiver transceiver |
| 电源电压 | 5 V |
| Number of Drivers | 2 |
| Number of Receivers | 2 |
| Duplex | Full duplex |
| Maximum Data Rate | 120 kbit/s |
| ESD Protection | ±15 kV |
| Charge Pump | Dual |
| External Capacitor Value | 0.1 µF each |
| RS-232 Compliance | TIA/EIA-232-F and ITU V.28 |
| 工作温度 | 0 °C to +70 °C |
| 封装 | 16-pin TSSOP |
| 安装类型 | Surface-mount |
| Packaging | Reel |
| 分类 | Interface IC |
MAX202CPW 16-pin tssop 引脚配置指南
MAX202CPW（16-pin tssop 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： MAX202CPW.
请参阅 数据手册 以查看完整引脚配置。
典型应用
MAX202CPW 适用于 6 应用s: Industrial Serial-Port Adapter, Point-of-Sale Terminal Interface, Data-Acquisition and Control System, Test and Measurement Instrument, Embedded Serial Communications Controller, Remote Monitoring and Telemetry Unit.
Industrial Serial-Port Adapter
The MAX202CPW fits a 5 V industrial adapter that converts a host UART into a ±RS-232 serial connection. Its two drivers and two receivers support two transmit and two receive functions, while the verified 120 kbit/s rating covers many legacy controller links. The 16-pin TSSOP package also saves board area compared with larger SOIC options. The 0 °C to +70 °C operating range should be checked against the enclosure’s actual temperature requirements; use a qualified extended-temperature MAX202 variant when the enclosure exceeds that range.
推荐
Point-of-Sale Terminal Interface
The MAX202CPW is suitable for point-of-sale equipment that connects a low-voltage controller to a legacy RS-232 peripheral. The 5 V supply integrates naturally with embedded systems, and the dual 2/2 organization can handle two serial channels where both directions are required. Its 120 kbit/s maximum rate is substantially above many peripheral-control links, while ±15 kV ESD protection adds useful defense at an exposed connector. Firmware must still implement the correct baud rate, parity, framing, and connector signal assignments.
推荐
Data-Acquisition and Control System
The MAX202CPW can bridge a data-acquisition controller to an RS-232 instrument or remote controller. A 5 V transceiver with two drivers and two receivers allows the same board to support more than one serial function when wiring and protocol allocation permit. The 120 kbit/s capability suits typical command-and-response traffic, and the ±15 kV protection rating helps reduce ESD risk where a cable reaches an external instrument. For laboratory or industrial installations, include chassis grounding, cable shielding, and appropriately rated connectors.
推荐
Test and Measurement Instrument
The MAX202CPW is appropriate for legacy test equipment that retains an RS-232 service or trigger interface. It operates from 5 V, fits into a compact 16-pin TSSOP footprint, and supports communication rates up to 120 kbit/s. Two drivers and two receivers can serve separate control and status paths, although each signal’s direction must match the device pinout and connector wiring. The ±15 kV ESD rating is particularly relevant to bench equipment whose port may be connected to untrusted cables, although normal cable and grounding practices remain necessary.
推荐
Embedded Serial Communications Controller
The MAX202CPW gives an embedded microcontroller or programmable controller a standards-oriented RS-232 interface. The MAX202CPW’s 5 V operating supply and 120 kbit/s rate align with legacy UART links, while the dual driver and receiver count provides two channels in each direction. The on-chip charge pump requires four external 0.1 µF capacitors, so board layout should reserve the capacitor positions close to the device. Firmware must handle RS-232 polarity, handshake requirements, and any timing differences between the UART and the external port.
推荐
Remote Monitoring and Telemetry Unit
The MAX202CPW can provide the wired communications front end for a remote monitoring unit that reports status to a host over RS-232. The 2/2 transceiver arrangement supports separate command and telemetry paths when required, and the 5 V supply simplifies integration with embedded systems. At up to 120 kbit/s, the link is appropriate for low-bandwidth telemetry and configuration traffic rather than high-volume file transfer. The verified 0 °C to +70 °C range suits controlled indoor equipment, but exposed outdoor installations require a qualified extended-temperature alternative.
推荐
推荐产品汇总
工程参考数据： MAX202CPW ——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 | MAX202IPWR | MAX202EPW+ | HIN202CP | ST232C |
|---|---|---|---|---|---|
| Manufacturer | Texas Instruments | Texas Instruments | Texas Instruments | Intersil | STMicroelectronics |
| Package | 16-TSSOP | 16-TSSOP | 16-TSSOP | 16-TSSOP | 16-TSSOP |
| Supply Voltage | 5 V | 5 V | 5 V | 5 V | 5 V |
| Driver and Receiver Count | 2 drivers and 2 receivers | 2 drivers and 2 receivers | 2 drivers and 2 receivers | 2 drivers and 2 receivers | 2 drivers and 2 receivers |
| Maximum Data Rate | 120 kbit/s | 120 kbit/s | 120 kbit/s | 120 kbit/s | 120 kbit/s |
| RS-232 Standards | TIA/EIA-232-F and ITU V.28 | TIA/EIA-232-F and ITU V.28 | TIA/EIA-232-F and ITU V.28 | RS-232 interface | RS-232 interface |
关键差异点
- Verified 15 kV ESD protection rating （对比 ST232C)
- Native 16-pin TSSOP footprint （对比 MAX202IDR)
- Dual full-duplex channel count （对比 MAX232DR)
- Charging-pump capacitors use a documented 0.1 µF value （对比 HIN202CP)
设计说明
Place all four required 0.1 µF charge-pump capacitors close to their associated MAX202CPW pins, following the manufacturer’s recommended capacitor configuration. Keep the charge-pump loop and driver-output routing compact, because long traces can increase radiated noise and make the external network less effective. Reserve the capacitor footprint before fixing the 16-TSSOP layout, and verify polarity and ESR requirements against the latest manufacturer datasheet before production release.
Separate logic-side UART traces from RS-232 driver outputs and connector pins to reduce coupling between the two sides of the interface. Route each RS-232 signal directly toward its connector rather than sharing long traces with unrelated signals. Keep ground-return connections short and use a solid ground plane, while noting that the device’s pin-to-pin ESD protection includes the specified serial-port connection pins and ground.
Do not assume that an RS-232 transceiver defines the serial protocol or automatically handles handshake signals. Confirm the MAX202CPW pin names, connector wiring, TX/RX polarity, logic levels, and whether hardware handshaking is required. Also verify the external 0.1 µF capacitor values and ensure that the selected MAX202 temperature grade remains within the enclosure’s ambient-temperature range.
RS-232 driver outputs can radiate noise when they operate on fast, poorly terminated edges even though the nominal data rate is only up to 120 kbit/s. Use a compact output path, maintain a continuous ground reference, and consider a cable-side series damping network where ringing is observed. ESD protection improves transient immunity, but it does not replace shielded cable, proper connector construction, or an industrial enclosure strategy.
合规信息
The verified search data identifies TIA/EIA-232-F and ITU V.28 interface compliance but does not provide extractable RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declarations. MAX202APW+ is presented as an automotive-grade MAX202 family option, but its AEC-Q100 status was not available in the supplied verified data.