ADM209ARS - 200kbps 5V RS-232 Transceiver | Analog Devices
MPN： ADM209ARS ✗ 停產ADM209ARS 概覽
A CMOS RS-232 transceiver is an interface IC that translates logic-level signals between a host or controller and RS-232-compatible equipment. In the hierarchy of electronic components, it belongs to interface ICs, within the broader semiconductor category. The driver channels convert TTL/CMOS logic into RS-232 levels, while the receiver channels convert RS-232 inputs back into logic levels. This allows equipment operating at different logic and voltage domains to communicate over a wired serial interface.
The ADM209ARS provides five receiver channels and three driver channels, making it useful where a design has more incoming data paths than outgoing data paths. Its 200 kbps maximum data rate supports moderate-speed serial links, while the 0.1 µF charge-pump capacitor requirement reduces external capacitance compared with earlier RS-232 implementations. The 30 V receiver input rating provides additional tolerance for exposed or industrial serial connections, although the complete interface still requires suitable protection in harsh environments.
Internally, the device combines CMOS drivers and receivers with on-board charge-pump circuitry. The charge pump generates the RS-232 voltage levels required by the drivers, while the enable pin supports shutdown operation that can reduce system power consumption. Because the part is specified for a single +5 V supply, the ADM209ARS simplifies system power architecture compared with dual-supply RS-232 transceivers. Its 24-lead SOIC package supports conventional surface-mount assembly and is the relevant footprint constraint when evaluating replacements.
Typical uses include industrial serial controllers, test equipment, point-of-sale systems, data-acquisition equipment, and embedded systems that need multiple RS-232 receive paths. A 3-transmitter design can connect several peripherals while five receiver inputs can monitor commands, status signals, or acknowledgments. In cable-based installations, designers should also consider ground reference, electrostatic discharge, surge, and isolation requirements that are outside the IC itself.
For replacement work, verify the complete 24-pin signal map, supply voltage, channel counts, charge-pump capacitor values, enable polarity, and receiver thresholds rather than relying only on the RS-232 protocol label. The page distinguishes documented cross-reference candidates from a manufacturer-confirmed universal replacement and marks unavailable technical and commercial fields where the retrieved sources do not provide verified values.
This page consolidates the retrieved Analog Devices product information, distributor availability, RS-232 application context, package constraints, and cross-reference guidance. It adds design-oriented selection criteria that are useful beyond the basic manufacturer description while clearly separating verified facts from information that still requires engineering confirmation.
直接替換替代品，適用於 ADM209ARS — 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。
MAX209CWE
✅ 直接替換📋 參考替代品（不在目錄中）
MAX205CWE
✅ 直接替換📋 參考替代品（不在目錄中）
MAX206CWE
✅ 直接替換📋 參考替代品（不在目錄中）
MAX211CWE
✅ 直接替換📋 參考替代品（不在目錄中）
MAX213CWE
✅ 直接替換📋 參考替代品（不在目錄中）
ADM209ARS 規格
| Product Type | RS-232 CMOS transceiver |
| 供應電壓 | +5 V |
| Driver Channel Count | 3 channels |
| Receiver Channel Count | 5 channels |
| Maximum Data Rate | 200 kbps |
| Charge-Pump Capacitor Value | 0.1 µF |
| Driver Output Swing | 9 V |
| Maximum Receiver Input Voltage | 30 V |
| Enable Control | 1 pin |
| Low-Power Shutdown | Supported |
| Power Consumption | 15 mW |
| 封裝 | 24-lead SOIC |
| 安裝類型 | Surface mount |
ADM209ARS 24-lead soic 腳位配置指南
ADM209ARS（24-lead soic 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： ADM209ARS.
請參閱 資料表 以查看完整腳位配置。
典型應用
ADM209ARS 適用於 6 應用s: Industrial Serial Controller, Point-of-Sale Terminal, Data-Acquisition Equipment, Test and Measurement Instrument, Embedded Service Console, Networking and Telecom Management.
Industrial Serial Controller
The ADM209ARS fits an industrial controller that must communicate with several RS-232 peripherals while monitoring multiple return channels. Its 3 driver channels support connections to as many as three transmit-capable devices, while 5 receiver channels can accept status, acknowledgment, or interlock signals. Operating from a single +5 V supply simplifies the interface power design, and the documented 200 kbps data rate covers moderate-speed command and control traffic. The 24-lead SOIC footprint is suitable for conventional industrial controller boards, but the obsolete lifecycle status should be addressed through obsolescence planning. External surge protection, robust grounding, and operating-temperature verification remain necessary because the interface IC itself does not provide complete cable protection.
推薦
Point-of-Sale Terminal
The ADM209ARS can support a point-of-sale terminal that receives commands or transactions from multiple peripherals while driving fewer output ports. The 5 receiver channels are useful for peripheral-ready, acknowledgment, and transaction-status lines, while the 3 drivers can serve printers, scanners, or customer-facing displays that require RS-232. Its +5 V single-supply operation aligns with many embedded point-of-sale designs, and the 200 kbps maximum rate is sufficient for short commands and serialized transaction data. The 24-lead SOIC package supports automated surface-mount assembly. Because the ADM209 family is obsolete, equipment builders should evaluate currently supported interface ICs for new deployments or reserve enough verified inventory to cover the product lifecycle.
推薦
Data-Acquisition Equipment
The ADM209ARS is applicable to data-acquisition equipment that must accept commands from a host and report measurements or equipment status over separate RS-232 paths. Five receiver channels can consolidate incoming service commands, ready signals, and acknowledgments, while 3 driver channels can serve a host connection and peripheral buses. The documented 30 V receiver input tolerance offers useful margin for externally exposed serial inputs, although designers should still install the appropriate overvoltage and surge protection. A 200 kbps rate supports command traffic and moderate data transfers, while the single +5 V supply requirement simplifies analog and digital power integration. For new instruments, verify temperature range and current availability because the retrieved information identifies the ADM209 family as obsolete.
推薦
Test and Measurement Instrument
The ADM209ARS can be used in a test instrument that needs to communicate with several RS-232-controlled fixtures while collecting multiple status inputs. The three driver channels can address external fixtures, and the five receivers can carry fixture-ready, pass/fail, interlock, and remote-trigger signals. Its 200 kbps rate is suitable for ordinary instrument-control protocols rather than high-speed bulk transfer. The single +5 V operation and surface-mount 24-lead SOIC package simplify integration into a modern instrument chassis. The part's obsolete status is a material lifecycle concern for test equipment that may remain in service for many years, so a supported replacement should be qualified if long-term availability is required.
推薦
Embedded Service Console
The ADM209ARS is suited to an embedded service console with several local diagnostic inputs and fewer outbound serial links. The five receiver channels can monitor service commands, module readiness, fault flags, and acknowledgments, while the three driver channels can connect to a service terminal or peripheral interface. Its 200 kbps throughput is more than adequate for configuration and diagnostic traffic, and the +5 V single-supply operation can simplify power sequencing around an embedded processor. The 24-lead SOIC package is compact enough for a densely populated controller board. Engineers should confirm logic levels, receiver thresholds, enable polarity, and charge-pump capacitor placement in the datasheet because those details were not exposed by the retrieved product snippets.
推薦
Networking and Telecom Management
The ADM209ARS may be used in management or service ports of networking equipment where several console inputs need to be consolidated onto a controller. Its 5 receiver channels can carry asynchronous control and status inputs, while 3 driver channels support console, relay, or peripheral connections. The 200 kbps rate suits administrative serial protocols, and the +5 V supply is common in embedded communication equipment. The 30 V receiver input limit can improve tolerance on exposed service interfaces, but it does not replace surge, isolation, or standards-compliant protection. Since the device is obsolete, new networking platforms should favor an active part, while maintenance designs should verify channel mapping and shutdown behavior before fitting the ADM209ARS.
推薦
推薦產品摘要
工程參考資料，適用於 ADM209ARS — 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 | MAX209CWE | MAX205CWE | MAX206CWE | MAX211CWE | MAX213CWE |
|---|---|---|---|---|---|---|
| Brand | Analog Devices | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Package | 24-lead SOIC | 24-lead SOIC | 24-lead SOIC | 24-lead SOIC | 24-lead SOIC | 24-lead SOIC |
| Device Type | RS-232 transceiver | RS-232 transceiver | RS-232 transceiver | RS-232 transceiver | RS-232 transceiver | RS-232 transceiver |
主要差異化特點
- More receive channels than a typical balanced RS-232 interface (對比MAX202IDR)
- Documented single-supply charge-pump implementation (對比MAX209CWE)
- Higher documented receiver input tolerance (對比MAX211CWE)
設計說明
Do not approve a substitute from the family relationship alone. Compare the exact 24-pin map for power, ground, enable, all 3 driver outputs, all 5 receiver inputs, and every charge-pump capacitor connection. Also verify enable polarity, receiver thresholds, driver output swing, and shutdown behavior in the relevant manufacturer datasheet. A protocol-compatible RS-232 IC can still be unusable if one enable or capacitor connection differs.
Use a +5 V supply with the decoupling and charge-pump capacitors specified by the manufacturer. The ADM209ARS uses 0.1 µF charge-pump capacitors and has a documented 9 V driver output swing. Keep the capacitor loops compact and follow the datasheet placement and polarity guidance. Estimated note: price and stock are quote-based as of 2026-10-29, and obsolete status makes supply continuity a more important constraint than a small unit-price difference.
Place the 0.1 µF charge-pump capacitors close to their numbered device pins, maintain short return paths, and keep exposed RS-232 connector nets away from sensitive analog or high-speed digital traces. Provide a defined ground reference between connected equipment and route surge currents away from the transceiver ground. The IC's 30 V receiver input rating is not a substitute for external protection on user-accessible cables.
Use the enable function to reduce system demand when the serial interface is not needed, but confirm the ADM209ARS enable polarity and shutdown state before changing firmware. The retrieved material documents low-power shutdown and 15 mW power consumption without providing detailed current-versus-state tables. Measure the complete board's shutdown current and ensure the host serial driver returns the interface to a valid state before re-enabling communication.
合規資訊
The supplied manufacturer and distributor snippets do not explicitly state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. The ADM209 family is identified as obsolete by Analog Devices.
