ADM236LJN - 4/3 5V RS-232 Transceiver | Analog Devices
料号： ADM236LJN ✗ 停产ADM236LJN 概述
A CMOS RS-232 transceiver is an interface IC that converts logic-level signals into RS-232-compatible voltage levels and converts received RS-232 signals back into logic levels. In the interface hierarchy, it belongs to the RS-232 transceiver category, then to communications interface ICs, then to broader interface and semiconductor families. It is useful wherever two systems must exchange serial data across a noise-prone, unbalanced cable using the EIA-232-E and V.28 signaling specifications.
Key features include a single 5 V power supply, four drivers, three receivers, a maximum data rate of 120 kB/s, an approximately 9 V output swing, and receiver input levels extending to 30 V. Low-power shutdown is supported, and the receivers remain active in shutdown according to the supplied family data. The interface also offers ESD protection greater than 2 kV and is described as latch-up free.
The ADM236L family uses onboard charge-pump circuitry to generate the bipolar voltage required by RS-232 drivers from a single positive supply. This architecture removes the external ±12 V requirement common to older RS-232 implementations. A 4-to-3 driver and receiver arrangement suits asymmetric links, including systems that transmit on several lines but receive data on a smaller number of channels.
Typical uses include industrial control links, point-of-sale equipment, instrumentation, data acquisition, and embedded serial ports where a 5 V system cannot provide ±12 V. The 120 kB/s capability is suitable for moderate-speed control and data-transfer channels rather than high-bandwidth protocols. Its DIP-24 package is also appropriate for through-hole legacy and industrial boards.
Designers should provide the datasheet-specified 1 uF capacitors, route the charge-pump and interface connections according to the manufacturer's application guidance, and keep RS-232 routing away from sensitive analog signals. Confirm supply tolerance, transceiver direction, and connector-level protection against the actual board requirements before production use.
This page combines verified manufacturer-family specifications, distributor availability information, structured comparison data, and practical integration guidance. It distinguishes package-level replacement constraints from merely similar RS-232 devices, helping engineers avoid substitutions that require pinout, channel-count, or board-layout changes.
直接替换替代料： ADM236LJN ——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： ADM236LJN （相同外形与封装尺寸） ——差异在于 Number of Drivers, Number of Receivers, Package, Product Type, RS-232 Output Swing.
ADM238LJN
✅ 直接替换📋 参考替代料（不在目录中）
ADM237LJN
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
ADM239LJN
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
ADM241LJN
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
ADM231LJN
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
ADM236LJN 规格参数
| Product Type | RS-232 driver/receiver transceiver IC |
| Number of Drivers | 4 drivers |
| Number of Receivers | 3 receivers |
| Supply Voltage Range | 4.5 V to 5.5 V |
| Nominal Supply Voltage | 5 V |
| Maximum Data Rate | 120 kB/s |
| RS-232 Output Swing | Approximately 9 V with 5 V supply |
| Onboard Charge-Pump Capacitors | 1 uF |
| DC-DC Converter | Onboard |
| Shutdown Function | Low-power shutdown |
| Receiver Operation During Shutdown | Receivers active in shutdown |
| Receiver Input Voltage | 30 V |
| RS-232 Standards | EIA-232-E and V.28 |
| ESD Protection | Greater than 2 kV |
| Latch-Up | Latch-up free |
| 工作温度 | 0 C to 70 C |
| 封装 | 24-pin DIP, 7.62 mm row spacing |
| 安装类型 | Through-hole |
| RoHS 状态 | Compliant |
ADM236LJN 24-pin dip, 7.62 mm row spacing 引脚配置指南
ADM236LJN（24-pin dip, 7.62 mm row spacing 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： ADM236LJN.
请参阅 数据手册 以查看完整引脚配置。
典型应用
ADM236LJN 适用于 6 应用s: Industrial Control Serial Interface, Point-of-Sale Terminal Connectivity, Data Acquisition and Instrumentation, Embedded Serial Port Expansion, Security and Access-Control Equipment, Service and Diagnostic Console.
Industrial Control Serial Interface
The ADM236LJN fits legacy industrial controllers that communicate over a point-to-point RS-232 link using only a regulated 5 V rail. Its four drivers and three receivers support several command, status, or interlock signals without requiring external ±12 V power. The maximum 120 kB/s rate is suitable for supervisory control data, while the approximately 9 V output swing and EIA-232-E and V.28 support provide an RS-232-compatible electrical interface. Designers should confirm the 0 C to 70 C operating range and verify channel direction against the controller schematic.
推荐
Point-of-Sale Terminal Connectivity
Point-of-sale peripherals often use RS-232 for receipt printers, customer displays, or service connectors even when the host electronics provide only 5 V. The ADM236LJN can drive four lines and receive three, making it useful for compact multi-function peripheral interfaces. Its 120 kB/s maximum data rate is more than adequate for typical configuration and transaction commands, while the onboard DC-DC converter and 1 uF capacitors simplify implementation around the transceiver. The design must still include suitable connector protection and verify the host's RS-232 logic direction.
推荐
Data Acquisition and Instrumentation
The ADM236LJN can bridge laboratory or industrial instrumentation that retains an RS-232 command port but lacks a bipolar supply. Multiple driver channels are useful for sending range, mode, trigger, and reset commands to separate instrument functions, while three receiver channels can return status or measurement acknowledgments. Operation from 4.5 V to 5.5 V simplifies integration with regulated test equipment, and 120 kB/s is adequate for short control packets. Engineers should observe the 0 C to 70 C range and validate the full instrument handshake before replacing legacy communications hardware.
推荐
Embedded Serial Port Expansion
An embedded controller with too few UART channels can use the ADM236LJN to expand a legacy serial interface, provided the target system supports the RS-232 electrical layer. Four driver outputs and three receiver inputs allow multiple control lines to coexist on one interface, and the 5 V supply requirement fits many embedded systems. The 120 kB/s ceiling makes the device appropriate for command and status traffic rather than bulk data transfer. Because the ADM236LJN is a transceiver rather than a protocol converter, firmware must independently handle framing, parity, and device addressing.
推荐
Security and Access-Control Equipment
ADM236LJN can support legacy access-control panels that distribute door commands, reader enables, alarms, and status returns over an RS-232 wiring run. Its four-driver, three-receiver arrangement suits asymmetric command-and-response systems, and the single 5 V supply reduces the power-conversion burden inside compact controller enclosures. The 120 kB/s data rate is adequate for identification and administrative records, while the 30 V receiver input rating adds tolerance for legacy signal conditions. Installation must verify surge, ground-loop, and connector requirements beyond the device's stated ESD protection.
推荐
Service and Diagnostic Console
The ADM236LJN is suitable for service consoles and diagnostic interfaces used to configure or inspect installed equipment over RS-232. Four outputs can initiate separate operations, while three inputs can return ready, fault, and acknowledgment signals. Its 5 V-only architecture simplifies portable or rack-mounted console electronics, and the 120 kB/s rate supports setup commands and diagnostic logs. The 0 C to 70 C operating range is appropriate for many indoor environments. Before deployment, confirm connector wiring, remote ground requirements, and whether the attached legacy equipment expects the ADM236LJN's 4/3 channel organization.
推荐
推荐产品汇总
工程参考数据： ADM236LJN ——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 | ADM238LJN | ADM237LJN | ADM239LJN | ADM241LJN | ADM231LJN |
|---|---|---|---|---|---|---|
| Package | DIP-24 | DIP-24 - same package | DIP-24 | DIP-24 | DIP-24 | DIP-24 |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
关键差异点
- Broader transmit and receive channel organization （对比 ADM238LJN)
- Single-supply RS-232 operation （对比 ADM238LJN)
- Full-size through-hole package （对比 SP232ECT-L)
设计说明
Place the datasheet-specified 1 uF charge-pump capacitors close to their associated ADM236LJN pins and use short, direct traces. Keep the RS-232 driver and receiver routes away from clocks, sensor inputs, and other sensitive analog nets. If the legacy system separates logic ground and RS-232 ground, define the connection intentionally at the interface reference point rather than allowing uncontrolled return current through the transceiver ground.
The ADM236LJN operates from a single 4.5 V to 5.5 V supply, so the board must provide a stable 5 V rail rather than relying directly on unregulated 5 V logic. Confirm supply tolerance, startup behavior, and the state of the shutdown pin before enabling external RS-232 equipment. The supplied data does not include quiescent-current values, so do not estimate power consumption without consulting the manufacturer datasheet.
Do not select a substitute based only on DIP-24 packaging. ADM238LJN is verified in the same package but has 2 drivers and 2 receivers rather than 4 drivers and 3 receivers. Confirm every channel direction, enable connection, charge-pump capacitor location, and shutdown function against the original schematic before substituting any ADM23x-family device.
RS-232 driver outputs are high-voltage, fast-edge signals and should not run parallel with sensitive analog inputs over long board distances. Use a solid ground reference, minimize stub branches, and keep external cables away from clock and reference lines. The verified family data cites ESD protection greater than 2 kV, but that rating does not replace connector surge protection or a properly designed chassis and ground system.
合规信息
RoHS compliance is taken from the supplied comparison data. The manufacturer family datasheet states that the devices are latch-up free. No verified REACH, lead-free, halogen-free, conflict-minerals, or AEC-Q100 information was supplied.
