MAX211CDB - 120 kbit/s 4/5 RS-232 Transceiver | Texas Instruments
料号： MAX211CDB ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $3.2251 | $3.23 |
| 10 | $3.2251 | $32.25 |
| 100 | $3.2251 | $322.51 |
| 500 | $3.2251 | $1,612.55 |
| 1,000 | $3.2251 | $3,225.10 |
MAX211CDB 概述
An RS-232 transceiver is an interface IC that converts logic-level signals into differential, voltage-swinged serial signals and converts received RS-232 levels back into logic-level voltages. In the interface hierarchy, the MAX211CDB belongs to the RS-232 transceiver, interface IC, and semiconductor categories. Its four-driver and five-receiver arrangement supports multiport communications equipment while providing three driver channels in shutdown for applications requiring partial low-power operation.
Key features include four drivers, five receivers, a 120 kbit/s operating rate, ±9 V driver output swing, ±15 kV ESD protection, and low supply current in shutdown. The integrated charge-pump circuitry supports single-supply operation. These characteristics make the device suitable for computers, industrial controllers, data-acquisition equipment, and other systems that exchange serial data over longer cable runs than TTL or CMOS interfaces can reliably support.
The RS-232 electrical interface uses unbalanced, single-ended signaling with a large voltage range relative to common-mode noise. The MAX211CDB is designed for TIA/EIA-232-F and ITU V.28 operation, as stated in the retrieved manufacturer-material summary. Its receiver and driver circuitry provide the voltage translation required at the boundary between digital logic and the RS-232 cable interface. The integrated ESD protection is particularly valuable when an exposed connector receives cable transients.
Typical uses include four-wire RS-232 links, multi-channel serial adapters, test equipment, and embedded systems that retain legacy peripheral connections. In a complete interface, the controller UART connects to TTL-level driver inputs, while each driver output feeds an external connector through the application’s protection and routing network. Receivers return cable signals to the UART through external resistor networks when the selected pinout calls for them.
Designers should confirm the exact DB package pinout and external charge-pump capacitor values from the manufacturer datasheet. Decoupling capacitors must be placed close to the supply pins, and cable-side routing should minimize exposed stubs. External protection, series resistance, and connector grounding should be selected with the target ESD, surge, and cable-length requirements in mind.
This page consolidates verified manufacturer and distributor information, package details, RS-232 design considerations, and drop-in alternatives into an engineering-focused selection resource. It also distinguishes verified specifications from parameters that still require confirmation from the current manufacturer datasheet.
直接替换替代料： MAX211CDB ——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： MAX211CDB （相同外形与封装尺寸） ——差异在于 Package, Product Type, Receiver Count, Data Rate, Supply Voltage.
快速对比工具——选择替代料号进行并排对比：
MAX213CAI
✅ 直接替换📋 参考替代料（不在目录中）
MAX211ECAI+T
✅ 直接替换📋 参考替代料（不在目录中）
MAX211EEAI
✅ 直接替换📋 参考替代料（不在目录中）
MAX211IDB
✅ 直接替换✓ 有现货
$1.41 / 个
查看数据手册 →ADM211ARSZ
✅ 直接替换📋 参考替代料（不在目录中）
ADM241LARSZ
✅ 直接替换📋 参考替代料（不在目录中）
MAX211CDB 规格参数
| Product Type | Multichannel RS-232 line driver/receiver |
| 电源电压 | 5 V |
| Driver Count | 4 |
| Receiver Count | 5 |
| Maximum Data Rate | 120 kbit/s |
| Driver Output Swing | ±9 V |
| RS-232 Bus Pin ESD Protection | ±15 kV, human-body model |
| Standards Support | TIA/EIA-232-F and ITU V.28 |
| 封装 | 28-pin SSOP, 5.30 mm width |
| 安装类型 | Surface mount |
| Shutdown Feature | Three driver outputs can be placed in shutdown |
| Power-Supply Topology | Single 5 V supply with integrated charge-pump circuitry |
MAX211CDB 28-pin ssop, 5.30 mm width 引脚配置指南
MAX211CDB（28-pin ssop, 5.30 mm width 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： MAX211CDB.
请参阅 数据手册 以查看完整引脚配置。
典型应用
MAX211CDB 适用于 6 应用s: Multiport Industrial Serial Interface, Legacy Computer Serial Port, Data Acquisition Controller, Test and Measurement Instrument, RS-232 Serial Adapter, Embedded Service Console.
Multiport Industrial Serial Interface
The MAX211CDB fits multiport industrial equipment that must translate several UART channels between logic levels and RS-232 cable signals. Four drivers and five receivers provide useful asymmetry for designs that need more receive channels than transmit channels, while the 120 kbit/s rating supports common legacy serial-control links. Its ±9 V driver swing suits standard RS-232 signaling, and the verified ±15 kV human-body-model protection adds defense at an exposed connector. Validate the industrial temperature grade, grounding strategy, and surge requirements before releasing the design.
推荐
Legacy Computer Serial Port
MAX211CDB can bridge a modern controller’s TTL or CMOS UART to a legacy RS-232 computer or peripheral connector. The 5 V supply architecture and integrated charge-pump circuitry allow operation without a separate bipolar supply, reducing board complexity. Four drivers support outbound command channels, and five receivers can accept status or control data. At rates up to 120 kbit/s, it is appropriate for many RS-232 links, although cable length, driver loading, and receiver thresholds must be checked against the actual communication standard and topology.
推荐
Data Acquisition Controller
The MAX211CDB is appropriate for data-acquisition equipment that retains RS-232 configuration, trigger, or status ports. Its five receivers can consolidate multiple low-speed signals arriving from an instrument or service connector, while four drivers support outbound control and acknowledgements. The verified 120 kbit/s rate is ample for configuration traffic, and the human-body-model ESD rating of ±15 kV provides useful connector-side protection. Keep external networks short, provide a solid chassis-to-logic grounding strategy, and verify isolation if the instrument can sit at a different earth potential.
推荐
Test and Measurement Instrument
MAX211CDB fits test instruments that communicate with legacy computers, printers, fixtures, or service equipment through RS-232. The integrated single-supply charge pump and four-driver/five-receiver arrangement can consolidate several instrument-control lines in one 28-SSOP device. Its 120 kbit/s limit aligns with many diagnostic and configuration protocols rather than high-speed data streaming. For bench instruments connected to user-accessible cables, retain the stated ±15 kV human-body-model protection and consider additional system-level surge protection based on the enclosure and cable environment.
推荐
RS-232 Serial Adapter
MAX211CDB can be used in a compact serial adapter that exposes multiple RS-232 ports to a host processor or programmable controller. Four transmit paths and five receive paths provide flexibility for common multiport adapter boards, while the 5 V supply and integrated charge pump simplify board-level power design. Its 120 kbit/s capability covers low- and moderate-speed serial equipment. Engineers should validate every connector assignment against the exact DB-package pinout and preserve separate logic ground and cable-return strategy to avoid introducing ground loops.
推荐
Embedded Service Console
MAX211CDB is well matched to embedded equipment that retains a service or commissioning port for configuration, diagnostics, and firmware retrieval. The four drivers support host commands, and the five receivers provide channels for console input, hardware status, and remote acknowledgements. A 120 kbit/s interface is sufficient for many text consoles and avoids the need for a separate negative-voltage supply. In deployed equipment, place the connector near the protection network, maintain a continuous signal-ground return, and verify that shutdown control states do not interfere with boot-time service access.
推荐
推荐产品汇总
工程参考数据： MAX211CDB ——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 | MAX213CAI | MAX211ECAI+T | MAX211EEAI | MAX211IDB | ADM211ARSZ | ADM241LARSZ |
|---|---|---|---|---|---|---|---|
| Package | 28-pin SSOP, 5.30 mm width | 28-pin SSOP class | 28-pin SSOP | 28-pin SSOP class | 28-pin SSOP class | 28-pin SSOP class | 28-pin SSOP class |
| Brand | Texas Instruments | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Analog Devices | Analog Devices |
关键差异点
- Asymmetric four-driver and five-receiver channel count （对比 ADM211ARSZ)
- Verified 120 kbit/s multichannel operation （对比 ADM241LARSZ)
- Single 5 V architecture with ±9 V driver swing （对比 MAX213CAI)
设计说明
Place the manufacturer-recommended 5 V bypass and charge-pump capacitors directly beside their associated MAX211CDB pins. The SSOP’s short leads reduce resistance but leave little room for long capacitor traces. Keep each charge-pump loop compact, use low-ESR ceramic capacitors with adequate voltage margin, and route the return current without crossing noisy switching nodes. First-power-up voltage and capacitor ripple should be measured on the finished assembly because external trace resistance can materially affect charge-pump behavior.
Do not treat every 28-pin RS-232 transceiver as interchangeable. Before substituting any listed candidate, compare package drawing, pin numbering, charge-pump connections, driver and receiver counts, TTL input thresholds, receiver outputs, shutdown pins, and external resistor networks. A matching data rate and package name are insufficient proof of pin compatibility. Also verify the DB suffix temperature range and lifecycle status against the current Texas Instruments ordering information before using MAX211CDB in an industrial or long-life product.
Route cable-side driver and receiver nets directly toward the protection network and connector. Avoid long parallel runs above split ground planes, and provide a continuous signal-ground return to the connector shell or chassis interface. If additional TVS devices or series resistors are used, confirm their capacitance and resistance at the intended 120 kbit/s data rate. ESD protection rated at ±15 kV human-body model should not be interpreted as complete industrial surge immunity.
合规信息
The verified snippets mention TIA/EIA-232-F, ITU V.28, and ±15 kV human-body-model ESD protection, but they do not provide explicit RoHS, REACH, lead-free, halogen-free, or conflict-minerals declarations for MAX211CDB. AEC-Q100 is not applicable to this general-purpose RS-232 interface based on the supplied classification data.
