ADM232LAN - 120 kbps Dual RS-232 Transceiver | Analog Devices
MPN： ADM232LAN ✗ 停產ADM232LAN 概覽
An RS-232 transceiver is an interface IC that converts between single-ended logic-level signals and differential bipolar signaling used by RS-232 equipment. The ADM232LAN integrates two transmitters and two receivers, an onboard DC-to-DC converter, and charge-pump circuitry capable of producing approximately 9 V output swing from a 5 V supply. This places it in the interface IC hierarchy alongside RS-232 line drivers, receivers, and full-duplex communication transceivers.
Key features include operation from one 5 V supply, 120 kbps data transmission, 1 µF external charge-pump capacitors, low-power shutdown, receiver operation during shutdown, and receiver input protection to 30 V. The dual 2/2 configuration allows two serial channels to be supported by one package. Its through-hole DIP construction is useful for legacy industrial control, instrumentation, test equipment, and system prototypes where surface-mount packages would be inconvenient.
The ADM232LAN uses an on-chip DC-to-DC converter and charge pump to develop the positive and negative voltages required by RS-232 drivers. This topology avoids external ±12 V rails, although the external capacitors must be connected correctly and placed close to the device. The receiver converts incoming RS-232 voltage levels to CMOS-compatible logic, while each driver converts CMOS logic into RS-232 output levels.
Typical uses include RS-232 ports in industrial controllers, laboratory instruments, barcode and data-acquisition equipment, configuration interfaces, and legacy computer peripherals. A two-channel implementation is especially useful where one port carries data and another carries control or status information.
PCB design should reserve the documented charge-pump capacitor connections and provide adequate copper and grounding around the interface. Because the ADM232LAN is packaged in a 16-pin DIP, existing through-hole layouts may be easier to reuse than with a surface-mount alternative. Verify signal levels, capacitor values, grounding, and system shutdown behavior before substituting another RS-232 transceiver.
This page combines verified distributor and datasheet-search information with practical interface-design guidance. It also distinguishes package-compatible alternatives from functionally similar devices that require different footprints or external-capacitor arrangements, helping engineers assess replacement risk before changing an RS-232 design.
直接替換替代品，適用於 ADM232LAN — 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： ADM232LAN （相同外形與佔位） — 差異在於 Interface Standard, Mounting Type, Package, Product Type.
MAX232EIN
✅ 直接替換📋 參考替代品（不在目錄中）
HIN232IPZ
✅ 直接替換📋 參考替代品（不在目錄中）
MAX232CPE+
✅ 直接替換📋 參考替代品（不在目錄中）
HIN232CPZ
✅ 直接替換📋 參考替代品（不在目錄中）
MAX232CWE+
✅ 直接替換聯絡詢價
查看資料表 →ADM232LAN 規格
| Product Type | 2/2 RS-232 transceiver |
| Number of Transmitters | 2 |
| Number of Receivers | 2 |
| 供應電壓 | 5 V |
| 資料速率 | 120 kB/s |
| Interface Standard | EIA-232-E and V.28 |
| On-Board DC-DC Converter | Yes |
| RS-232 Output Swing | 9 V |
| External Charge-Pump Capacitor | 1 µF |
| Low-Power Shutdown | Yes |
| Receivers Active During Shutdown | Yes |
| Maximum Receiver Input Voltage | 30 V |
| 封裝 | 16-pin PDIP |
| 安裝類型 | Through-hole |
ADM232LAN 16-pin pdip 腳位配置指南
ADM232LAN（16-pin pdip 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： ADM232LAN.
請參閱 資料表 以查看完整腳位配置。
典型應用
ADM232LAN 適用於 6 應用s: Industrial Controller Serial Port, Laboratory Data-Acquisition Equipment, Legacy Computer Peripheral Interface, Barcode and Data-Collection Terminal, Instrument Configuration and Control, Test and Measurement Interface.
Industrial Controller Serial Port
The ADM232LAN suits an industrial controller that must retain an established 16-pin through-hole RS-232 interface. Its two transmitters and two receivers support bidirectional data and control links, while operation from one 5 V supply avoids a separate ±12 V rail. The verified 120 kB/s data rate is suitable for configuration, status, and supervisory communications rather than high-bandwidth storage transfer. Because the device is marked obsolete, maintaining legacy equipment may justify its use when no footprint change is permitted. A replacement should be accepted only after checking the numbered pinout, 1 µF charge-pump capacitor connections, shutdown behavior, and receiver-input limits.
推薦
Laboratory Data-Acquisition Equipment
The ADM232LAN can provide a legacy RS-232 command port in laboratory instruments that already use a through-hole interface layout. Its dual-channel 2/2 configuration allows one pair to carry measurement data and another to carry equipment control, while the integrated DC-to-DC converter supplies bipolar drive capability from a 5 V supply. The verified 120 kB/s limit suits configuration logs, status packets, and short command sequences. Designers must preserve the documented external 1 µF capacitors and account for the maximum 30 V receiver-input condition. For new compact instruments, a USB bridge or a modern surface-mount RS-232 transceiver may reduce board area, but such alternatives are not drop-in replacements without PCB changes.
推薦
Legacy Computer Peripheral Interface
ADM232LAN is applicable to legacy computer peripherals and test adapters that need a conventional RS-232 port without a separate bipolar supply. One transmitter/receiver pair can be assigned to the primary data channel and the second pair to handshake or auxiliary control signaling. Operation from a single 5 V supply simplifies compatibility with older CMOS logic, while the verified 120 kB/s rate supports moderate-speed serial control. The 16-pin PDIP package can simplify repair and rework on through-hole equipment. Before installation, confirm the transceiver’s pin numbering, logic polarity, charge-pump capacitor polarity, and signal-ground strategy. A DB-9 wiring change or a USB conversion should be treated as a system redesign rather than a component-level drop-in substitution.
推薦
Barcode and Data-Collection Terminal
The ADM232LAN can interface a barcode scanner, data collector, or receipt printer through an existing RS-232 port. Its 2/2 arrangement allows command transmission and received data to share the interface circuit, and the 120 kB/s capability exceeds the throughput normally needed for short scanner records or transaction messages. A single 5 V supply also reduces adapter complexity in portable equipment compared with a design requiring separate ±12 V rails. The 16-pin DIP package is useful when repairing a legacy board, although modern handheld products generally favor a smaller interface solution. Validate cable length, driver slew behavior, logic levels, and shutdown state against the complete system specification before deployment.
推薦
Instrument Configuration and Control
ADM232LAN is appropriate for an instrument that requires a dedicated RS-232 path for configuration commands, calibration data, and status reporting. The dual transmitters and dual receivers support a full-duplex interface and allow a control channel to coexist with a data channel, while the onboard DC-to-DC converter eliminates the need for external bipolar voltage generation. Its verified 120 kB/s data rate supports control traffic and moderate diagnostic transfers. Designers should verify the exact logic thresholds, receiver-input protection, and shutdown behavior in the manufacturer datasheet. The through-hole package preserves serviceability in long-lifecycle equipment. If the product is being redesigned around USB, a USB-to-serial bridge can reduce connector and interface complexity but will require PCB and firmware changes.
推薦
Test and Measurement Interface
The ADM232LAN can connect a bench instrument or automated test fixture to an RS-232 controller when retaining a through-hole PCB is necessary. Its two communication channels can carry commands and measured results concurrently, and its verified 120 kB/s rate is appropriate for many automated measurement-control protocols. The integrated charge pump allows operation from one 5 V rail, reducing external supply complexity. The 16-pin PDIP package can also simplify repair of legacy test equipment. Critical checks include the external 1 µF capacitor placement, reliable signal-ground connection, receiver-input exposure, and whether the receivers should remain active while the driver section is shut down. New test systems should evaluate USB or surface-mount interfaces as deliberate redesign options.
推薦
推薦產品摘要
工程參考資料，適用於 ADM232LAN — 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 | MAX232EIN | HIN232IPZ | MAX232CPE+ | HIN232CPZ | MAX232CWE+ |
|---|---|---|---|---|---|---|
| Brand | Analog Devices | Maxim Integrated | Intersil | Maxim Integrated | Intersil | Maxim Integrated |
| Package | 16-pin PDIP | 16-pin PDIP - same | 16-pin PDIP - same | 16-pin PDIP - same | 16-pin PDIP - same | 16-pin PDIP - same |
| Transmitters | 2 | 2 | 2 | 2 | 2 | 2 |
| Receivers | 2 | 2 | 2 | 2 | 2 | 2 |
| Supply Voltage | 5 V | 5 V | 5 V | 5 V | 5 V | 5 V |
主要差異化特點
- Established 16-pin through-hole RS-232 footprint (對比MAX232DR)
- Documented 1 µF charge-pump capacitor arrangement (對比MAX3232ECPE+)
- Receivers remain active during shutdown (對比HIN232IPZ)
- 120 kB/s dual-channel operation from one 5 V supply (對比MAX232EIN)
設計說明
Place the ADM232LAN charge-pump capacitors exactly as shown in the manufacturer application diagram and keep their connections short. The verified feature list specifies 1 µF capacitors; substituting a different value without checking the associated datasheet can change startup behavior, supply current, or driver output. Maintain the documented ground connections and avoid routing RS-232 driver traces beneath the charge-pump capacitor network.
Separate the RS-232 connector-side traces from sensitive logic and analog routing. The ADM232LAN converts bipolar RS-232 levels to CMOS levels internally, but long connector stubs, poor grounding, or closely coupled driver and receiver routes can still reduce signal integrity. Keep the transceiver near the interface connector when practical, use a suitable ground reference, and inspect the assembled board for shorts around the 16-pin DIP footprint.
Do not assume that every 2/2 RS-232 transceiver is a drop-in replacement for ADM232LAN. Although MAX232EIN and HIN232IPZ are identified as close candidates, verify the numbered pinout, charge-pump capacitor value, shutdown polarity, receiver threshold, and supply limits in the exact replacement datasheet. The verified search material also warns that a modern MAX3232-family device may use different external capacitors, making it unsuitable as a literal footprint-compatible substitution without component and PCB changes.
Budget for the ADM232LAN charge-pump load in addition to ordinary 5 V rail requirements, and provide local bypassing where the manufacturer datasheet recommends it. The device can produce approximately 9 V RS-232 output swing from one 5 V supply, so downstream protection and cable routing must remain compatible with that generated bipolar voltage. During replacement testing, compare startup and shutdown current because the verified snippets do not provide complete operating-current values.
合規資訊
The supplied verified snippets do not provide extractable RoHS, REACH, lead-free, halogen-free, or conflict-minerals statements for ADM232LAN. Compliance fields remain unknown rather than inferred.