ADM236LAN - 5V 4/3 RS-232 Transceiver | Analog Devices
MPN： ADM236LAN ✗ 停產ADM236LAN 概覽
A CMOS RS-232 transceiver is an interface IC that converts digital logic levels into RS-232 line levels and converts incoming RS-232 signals back into logic-compatible levels. It belongs to the interface IC hierarchy, where transceiver ICs bridge low-voltage digital systems and older, high-voltage serial interfaces. The ADM236LAN combines transmit and receive functions in one device, reducing the number of separate line-interface components required by an RS-232 port.
Key features include compliance with EIA-232-E and V.28 specifications, operation from one 5 V supply, a 120 kB/s maximum data rate, and four transmitters with three receivers. The integrated DC-DC converters eliminate the need for a separate negative supply rail and permit approximately 9 V output swing. The shutdown function reduces power use when the interface is inactive, while the always-active receivers can continue detecting incoming data.
The device uses CMOS drivers and receivers to combine RS-232 signal conditioning with modern low-power logic interfacing. Its 1 F charge-pump capacitors support the on-board converters, and the 30 V receiver input rating provides margin for exposed serial ports. Designers should still protect the driver outputs against sustained overvoltage, electrostatic discharge, and uncontrolled cable transients according to the system-level requirements.
Typical uses include industrial equipment, laboratory instruments, data acquisition systems, legacy controller ports, configuration interfaces, and service equipment requiring a compact RS-232 connection. The four-driver capability allows multi-channel arrangements, while three receiver channels support monitoring or handshake signals. It is particularly useful where a modern controller must communicate with equipment that retains an RS-232 interface.
A key design consideration is that the ADM236LAN operates from 5 V, but its RS-232 driver outputs still use elevated voltage levels generated internally. Place the 1 F converter capacitors and interface-protection components close to their associated pins, keep the converter loop compact, and provide suitable return paths for high-current driver transitions.
This page consolidates verified manufacturer and distributor information, same-package alternatives, technical comparisons, and practical integration guidance. It also distinguishes documented electrical characteristics from parameters that require confirmation against the current Analog Devices datasheet before a new design is released.
直接替換替代品，適用於 ADM236LAN — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： ADM236LAN （相同外形與佔位） — 差異在於 Number of Drivers, Number of Receivers, Package, Product Type, RS-232 Output Swing.
ADM236LAN 規格
| Product Type | CMOS RS-232 transceiver |
| Number of Drivers | 4 |
| Number of Receivers | 3 |
| 供應電壓 | 5 V |
| Maximum Data Rate | 120 kB/s |
| RS-232 Output Swing | 9 V from a 5 V supply |
| DC-DC Converter Capacitor | 1 F |
| Receiver Input Voltage Rating | 30 V |
| Shutdown Feature | Low-power shutdown with receivers active |
| Interface Compliance | EIA-232-E and V.28 |
| 封裝 | 24-pin PDIP |
| Package Pitch | 7.62 mm |
| Package Body Width | 0.300 inch |
| 安裝類型 | Through-hole |
| Manufacturer Product Page | Analog Devices |
ADM236LAN 0.300 inch 腳位配置指南
ADM236LAN（0.300 inch 封裝）的腳位配置。 腳位編號、功能與連接圖定義於製造商資料手冊中。請參閱該手冊以取得確切的封裝尺寸與焊接指引。
無詳細腳位定義資料： ADM236LAN.
請參閱 資料表 以查看完整腳位配置。
典型應用
ADM236LAN 適用於 6 應用s: Industrial Equipment Serial Ports, Laboratory Instrument Control, Legacy Controller Connectivity, Data Acquisition Systems, Configuration and Service Interfaces, Multi-Channel RS-232 Port Expansion.
Industrial Equipment Serial Ports
The ADM236LAN fits industrial equipment that retains an RS-232 service or control port because it combines four drivers and three receivers in one 24-pin PDIP device. Operation from one 5 V supply removes the need for a separately generated negative rail, while the integrated DC-DC converters produce the required 9 V RS-232 output swing. At data rates up to 120 kB/s, the device can service conventional control and configuration links rather than high-speed differential networks. Designers should place the required 1 F converter capacitors close to the device, use a solid ground return, and verify the production availability of the obsolete ADM236LAN before committing new industrial designs.
推薦
Laboratory Instrument Control
The ADM236LAN is appropriate for laboratory instruments and test equipment that communicate through a legacy RS-232 control interface. Four transmitter channels can support data and command signaling, while three receiver channels can monitor responses or handshake lines. Its 120 kB/s maximum data rate is suitable for ordinary serial-control traffic, and the single 5 V supply simplifies internal power distribution. The 30 V receiver input rating adds useful margin when the port must tolerate voltage excursions, but exposed connectors still need appropriately selected surge and ESD protection. Confirm operating-temperature requirements and the obsolete lifecycle status before using the ADM236LAN in a new instrument platform.
推薦
Legacy Controller Connectivity
The ADM236LAN can bridge a modern low-voltage controller to equipment that retains an RS-232 interface. It accepts CMOS-compatible logic on the driver side and returns receive data at logic-compatible levels, avoiding separate level-shifting ICs around the connector. The four-driver and three-receiver arrangement is useful when the interface requires multiple outbound control signals alongside fewer inbound status signals. Because the device includes on-board DC-DC converters and 1 F capacitors, the layout must minimize converter-capacitor loops to reduce noise. Its 120 kB/s data rate suits many legacy command protocols, while the 30 V receiver input rating should not be mistaken for a complete external surge-protection solution.
推薦
Data Acquisition Systems
The ADM236LAN supports data-acquisition systems that must communicate with older sensors, analyzers, or laboratory fixtures over RS-232. Three receiver channels can collect responses or status signals, while the four-driver configuration provides additional command and control channels. Its 120 kB/s rate is more than adequate for many low-bandwidth measurement-control protocols, and the 5 V-only supply simplifies mixed analog and digital power planning. The integrated voltage converters eliminate an external negative supply, but correct capacitor placement remains important for stable operation. Engineers should assess the obsolete lifecycle status, temperature range, and connector protection requirements before releasing a new acquisition platform.
推薦
Configuration and Service Interfaces
The ADM236LAN is suitable for configuration and service connectors where a device needs several RS-232 outputs but fewer receive channels. Four drivers can implement command, reset, mode, or diagnostic signaling, and the three receivers can support response and activity monitoring. Because all interfaces are integrated in a 24-pin PDIP, the design avoids a separate array of single-channel driver ICs. The 5 V supply and on-board converters simplify service-board implementation, while 1 F capacitor placement should follow the manufacturer's layout guidance to limit conducted and radiated emissions. For new production, verify lifecycle availability and qualify the verified ADM236LJN replacement or another appropriately validated substitute.
推薦
Multi-Channel RS-232 Port Expansion
The ADM236LAN can expand an embedded system's RS-232 connectivity through its four transmitter channels and three receiver channels in a single package. This is useful where one logical port must support multiple command or monitoring links, subject to the restrictions of the connected RS-232 standard. The device supports rates up to 120 kB/s, and its integrated DC-DC converters produce a 9 V output swing from one 5 V rail. Through-hole packaging also makes the part convenient for legacy or maintenance-oriented controller boards. Designers must preserve adequate grounding, use the specified 1 F capacitors, protect connector-facing pins, and account for the obsolete status when planning long-lived production.
推薦
推薦產品摘要
工程參考資料，適用於 ADM236LAN — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | ADM236LJN |
|---|---|---|
| Package | DIP-24 | DIP-24 - same package |
| Brand | Analog Devices | Analog Devices - same brand |
| Transceiver Configuration | 4 drivers / 3 receivers | 4 drivers / 3 receivers |
| Supply Voltage Range | 4.5 V to 5.5 V | 4.5 V to 5.5 V |
| Product Status | Obsolete | Obsolete |
主要差異化特點
- Four transmitters exceed the three receivers in a 4/3 interface (對比ADM236LJN)
- Single 5 V supply with integrated DC-DC conversion (對比ADM236LJN)
- Receiver inputs tolerate elevated voltage (對比ADM236LJN)
- Verified operating rate (對比ADM236LJN)
設計說明
Place the two required 1 F converter capacitors close to their designated ADM236LAN pins and keep each loop as compact as possible. According to the manufacturer datasheet summary, the on-board DC-DC converters use small 1 F capacitors to generate the elevated RS-232 output levels from a 5 V supply. Long capacitor traces increase loop area and can add converter noise or unstable behavior. Follow the datasheet's polarity and spacing instructions exactly, and provide a low-impedance ground path beneath the associated circuitry.
Do not treat the 30 V receiver input rating as permission to omit connector protection. It is a device-level input rating, not a guarantee against ESD, cable transients, or incorrect equipment connections. Add the protection required by the installation environment, including surge and ESD control where cables leave the enclosure. Also avoid driving an ADM236LAN output simultaneously from another transmitter, because bus contention can produce destructive current even though the interface is intended for point-to-point RS-232 links.
Design the 5 V supply with margin for both logic load and the dynamic current drawn by the four RS-232 drivers during data transitions. The converters generate approximately 9 V output swing from the 5 V input, but cable loading and simultaneous data activity can increase supply demand. Keep the regulator and ADM236LAN return path coordinated so converter and driver currents do not share long, narrow traces. Decouple the 5 V rail locally and verify the design across the intended 120 kB/s traffic pattern rather than only with the interface idle.
Route the RS-232 driver outputs directly toward the connector while keeping unprotected high-voltage nets away from sensitive analog or high-speed digital traces. Maintain a consistent signal-ground reference between the transceiver and connector shield, and terminate or bias unused receiver inputs as recommended by the datasheet. Because the ADM236LAN is through-hole DIP-24, inspect lead spacing against connector and enclosure design rules; automated through-hole routing can create accidental connections between adjacent pins if spacing is insufficient.
合規資訊
The verified source material confirms EIA-232-E and V.28 interface compliance but does not provide explicit RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declarations.