MAX232CSE+ - Dual RS-232 Transceiver, 16-SOIC | Analog Devices
料号： MAX232CSE+ ✓ 量产中MAX232CSE+ 概述
An RS-232 transceiver is an interface IC that converts low-voltage logic-level signals into differential, bipolar line signals and converts received line signals back into logic-compatible levels. The MAX232 belongs to the RS-232 interface transceiver category, combining line drivers, line receivers, and an on-chip charge-pump voltage converter in one package. This integration allows a 5 V circuit to communicate with legacy serial equipment without a separate negative-power supply.
The device provides two driver channels and two receiver channels, supporting full-duplex serial communication when both directions are used. Its 4.5 V to 5.5 V operating supply supports conventional 5 V digital systems, while the internal charge pump generates the positive and negative voltages required to drive RS-232 loads. The wide-logic compatibility and integrated level translation make the MAX232 suitable for UART-based links, control equipment, and legacy peripheral connections.
The MAX220 through MAX249 family is specified for EIA/TIA-232E and V.28/V.24 communications interfaces. This is particularly important where the equipment must interoperate with older RS-232 ports rather than only with modern low-voltage serial standards. The C suffix identifies the capacitor and operating-temperature configuration, while the E suffix denotes the narrow SOIC package and the trailing plus identifies the lead-free ordering code.
Typical uses include industrial controller-to-console links, configuration ports on test equipment, service interfaces for printers and scanners, and communication links between 5 V microcontrollers and RS-232 equipment. The two receiver channels can also monitor two incoming lines when only one transmit channel is needed. System designers should account for the charge-pump capacitors, grounding, logic levels, and the slower edge rates associated with the selected RS-232 implementation.
Place the charge-pump capacitors and interface-decoupling capacitor close to their associated pins and route driver outputs and receiver inputs away from sensitive clock, reset, and analog signals. Keep the ground and supply return paths short because the receiver must distinguish small logic-side transitions from bipolar RS-232 levels. Confirm signal polarity, baud rate, and flow-control requirements at the software interface before replacing an existing MAX232 implementation.
This product page combines the confirmed electrical identity, package information, interface standards, and drop-in alternatives with application-oriented design guidance. It helps engineers identify the correct RS-232 transceiver, verify footprint compatibility, and plan charge-pump capacitance and PCB layout before committing a MAX232CSE+ to a new PCB.
直接替换替代料： MAX232CSE+ ——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： MAX232CSE+ （相同外形与封装尺寸） ——差异在于 Package, Data Rate, Function, Product Type, Supply Voltage Range.
MAX232ACSE+T
✅ 直接替换联系询价
查看数据手册 →MAX232ESE+
✅ 直接替换 ⚠️ 规格未核验联系询价
查看数据手册 →MAX3232ESE+TG035
✅ 直接替换联系询价
查看数据手册 →ST232CSE
✅ 直接替换📋 参考替代料（不在目录中）
SP232ACP-L
✅ 直接替换联系询价
查看数据手册 →MAX232CSE+ 规格参数
| Product Type | Dual RS-232 Transceiver |
| Interface Standard | EIA/TIA-232E, V.28, V.24 |
| Supply Voltage Range | 4.5 V to 5.5 V |
| Number of Drivers | 2 |
| Number of Receivers | 2 |
| Transceiver Configuration | 2/2 Full RS-232 |
| 封装 | 16-SOIC narrow |
| 引脚数量 | 16 pins |
| 安装类型 | Surface mount |
| Technology | CMOS |
| Charge Pump | On-chip voltage converter |
| Supply Polarity | Single positive supply |
MAX232CSE+ 引脚配置
| 引脚 1 | R1OUT — Receiver 1 output |
| 引脚 2 | R2OUT — Receiver 2 output |
| 引脚 3 | R2IN — Receiver 2 input |
| 引脚 4 | R1IN — Receiver 1 input |
| 引脚 5 | V- — Negative charge-pump output |
| 引脚 6 | V+ — Positive charge-pump output |
| 引脚 7 | T1OUT — Transmitter 1 output |
| 引脚 8 | T2OUT — Transmitter 2 output |
| 引脚 9 | T2IN — Transmitter 2 input |
| 引脚 10 | T1IN — Transmitter 1 input |
| 引脚 11 | VCC — Positive supply input |
| 引脚 12 | GND — Ground |
| 引脚 13 | C2+ — Charge-pump capacitor 2 positive terminal |
| 引脚 14 | C2- — Charge-pump capacitor 2 negative terminal |
| 引脚 15 | C1- — Charge-pump capacitor 1 negative terminal |
| 引脚 16 | C1+ — Charge-pump capacitor 1 positive terminal |
典型应用
MAX232CSE+ 适用于 6 应用s: Microcontroller RS-232 Console, Industrial Controller Communication, Test and Measurement Equipment, Printer and Scanner Interface, Configuration and Service Port, Dual-Channel RS-232 Interface.
Microcontroller RS-232 Console
The MAX232CSE+ fits a 5 V microcontroller system that must communicate with a legacy RS-232 console or service port. Its 4.5 V to 5.5 V supply range operates from the same rail as the host logic, while two transmitters and two receivers support full-duplex UART traffic. Place the charge-pump capacitors close to their assigned pins and connect the device-side ground to the system ground. The principal trade-off is RS-232's limited data rate and transition behavior compared with modern differential or single-ended serial standards, so the UART configuration and cable length must be checked against the intended channel.
推荐
Industrial Controller Communication
The MAX232CSE+ is appropriate for an industrial controller that must interface with legacy RS-232 equipment using the EIA/TIA-232E, V.28, or V.24 conventions. Its 2/2 channel arrangement allows one controller to transmit commands and receive responses, and the integrated charge pump removes the need for a separate negative supply rail. Keep the transceiver close to the connector and route the driver outputs as a protected pair away from sensitive analog inputs. For factory equipment, verify the environmental grade and fault-tolerance requirements of the target installation before treating this commercial interface IC as sufficient for harsh electrical conditions.
推荐
Test and Measurement Equipment
The MAX232CSE+ can provide a simple control connection between modern test hardware and RS-232 accessories. The 5 V supply range suits logic-heavy instruments, while the dual drivers and receivers support command transmission and status reception. The transceiver should be positioned near the serial connector to minimize the unprotected driver-output segment and keep external cable transients away from sensitive circuitry. Verify instrument grounding, logic polarity, handshake requirements, and baud-rate limits before connection; the MAX232 handles level conversion but does not add protocol synchronization or solve incompatible grounding.
推荐
Printer and Scanner Interface
The MAX232CSE+ is useful for connecting a 5 V embedded controller to a legacy printer, scanner, or programming adapter that exposes only an RS-232 port. Two transmitter and receiver channels support the normal request-and-response pattern used by many peripherals. Place input and output protection at the connector boundary if the cable is externally accessible, and keep the logic-side ground reference appropriate to both devices. Because legacy peripherals may vary in pin assignment and voltage interpretation, confirm the connector wiring and handshake sequence before energizing the interface.
推荐
Configuration and Service Port
A configuration port built around the MAX232CSE+ can let a 5 V embedded product expose diagnostics, firmware loading, or configuration commands through a legacy computer connection. The single positive supply simplifies system integration, while the integrated voltage conversion provides the bipolar RS-232 levels required at the line. Firmware should define stable command framing, timeout behavior, and an administrative interface before field deployment. Hardware designers should also reserve a path to disable or reconfigure the interface if security policy requires physical access to maintenance operations.
推荐
Dual-Channel RS-232 Interface
The MAX232CSE+ supports two RS-232 channels when a system needs more than one point-to-point serial link. One receiver can also remain available for monitoring a second signal while the primary pair carries bidirectional traffic. Both sides of each link must be configured with compatible baud rate, data bits, parity, and stop bits, and unused channels should be terminated according to the selected receiver design. The 16-SOIC footprint supports compact layouts, but external protection, isolation, or galvanic separation must be added when the interface leaves the enclosure.
推荐
推荐产品汇总
工程参考数据： MAX232CSE+ ——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 | MAX232ACSE+ | MAX232ESE+ | MAX3232ESE | ST232CSE | SP232ACP-L |
|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | STMicroelectronics | Exar |
| Package | 16-SOIC | 16-SOIC | 16-SOIC | 16-SOIC | 16-SOIC | 16-SOIC |
| Product Type | Dual RS-232 Transceiver | Dual RS-232 Transceiver | Dual RS-232 Transceiver | Dual RS-232 Transceiver | RS-232 Transceiver | Dual RS-232 Transceiver |
| Number of Drivers | 2 | 2 | 2 | 2 | 2 | 2 |
| Number of Receivers | 2 | 2 | 2 | 2 | 2 | 2 |
| Pin Count | 16 pins | 16 pins | 16 pins | 16 pins | 16 pins | 16 pins |
关键差异点
- Established 2/2 dual-transceiver configuration in a 16-SOIC footprint （对比 MAX3232ESE)
- Direct same-family MAX232 configuration option （对比 MAX232ACSE+)
- Cross-brand replacement path without changing the package （对比 ST232CSE)
设计说明
Place all four charge-pump capacitors directly between their assigned IC pins, with the shortest possible traces and the ground return established through the device ground pin. Keep the VCC bypass capacitor adjacent to the supply pin. This minimizes switching-current loops in the charge-pump network and reduces coupling into nearby logic or analog traces.
Route the two driver outputs as a paired RS-232 line and keep them away from receiver inputs, crystal circuits, reset lines, and analog inputs. Place any connector-side protection near the connector rather than beside the transceiver. This separation reduces capacitive injection from driver transitions into sensitive receiver and clock nodes.
Do not assume that every 16-pin RS-232 transceiver can use the same charge-pump capacitor values. Confirm the C-suffix capacitor requirement for MAX232CSE+ and compare each candidate's value and tolerance before substitution. Also verify the logic-side input thresholds, receiver output levels, temperature grade, and exposed-metal or package details before approving a drop-in replacement.
合规信息
The trailing plus in MAX232CSE+ denotes the lead-free ordering configuration, but formal RoHS, REACH, halogen-free, and conflict-minerals statuses require confirmation from the manufacturer product documentation.
