ADM232AARN - 200kbps Dual RS-232 IC | Analog Devices
MPN： ADM232AARN ✓ 啟用中ADM232AARN 概覽
An RS-232 transceiver is a semiconductor interface that converts low-voltage digital logic signals into bipolar RS-232 levels and converts received bipolar signals back into TTL or CMOS logic levels. Within the electronics hierarchy, the ADM232AARN is an RS-232 transceiver, interface IC, and power-management-assisted data-conversion component used to bridge modern digital equipment with legacy serial ports.
The ADM232AARN integrates an on-chip DC-DC charge pump, allowing bipolar RS-232 levels to be generated from one 5 V supply without a separate negative power rail. The charge pump uses small 0.1 uF external capacitors. Its two-driver, two-receiver arrangement supports two RS-232 channels per package and reduces the number of interface components required in multi-port equipment.
Data rates reach 200 kB/s, making the device suitable for equipment that needs faster serial transfer than low-speed RS-232 transceivers. The interface meets EIA-232-E and V.28 specifications. According to the Analog Devices datasheet, the outputs provide approximately 9 V swing with a 5 V supply, while the receivers accept input voltages to 30 V, providing useful margin for standard RS-232 signaling.
Typical uses include industrial control consoles, point-of-sale equipment, instrumentation, data acquisition systems, and embedded products that retain a legacy RS-232 port. The integrated charge pump simplifies board layout, while the narrow 16-SOIC package supports space-constrained designs without requiring a separate negative supply regulator.
When laying out the circuit, place the charge-pump capacitors close to their specified pins and route the driver outputs and receiver inputs away from sensitive analog and high-speed digital traces. Confirm ground-reference compatibility between the two connected RS-232 endpoints because the interface converts voltage levels but does not isolate the ground connection.
This page combines device specifications, pin-compatible alternatives, interface application guidance, and practical layout considerations to support component selection, PCB implementation, and sourcing decisions for the ADM232AARN.
直接替換替代品，適用於 ADM232AARN — 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： ADM232AARN （相同外形與佔位） — 差異在於 Package, Supply Voltage, Charge-Pump Capacitor Value, Maximum Data Rate, Receiver Input Voltage Range.
ADM232LAR
✅ 直接替換聯絡詢價
查看資料表 →ADM232AARN 規格
| Product Type | Dual RS-232 line driver and receiver transceiver |
| Maximum Data Rate | 200 kB/s |
| 供應電壓 | 5 V |
| Number of Drivers | 2 |
| Number of Receivers | 2 |
| Number of RS-232 Channels | 2 |
| Charge-Pump Capacitor Value | 0.1 uF |
| Integrated Voltage Converter | On-chip DC-DC charge pump |
| Transmitter Output Swing | 9 V with 5 V supply |
| Receiver Input Voltage Range | Up to 30 V |
| RS-232 Compliance | EIA-232-E and V.28 |
| 封裝 | 16-lead narrow SOIC |
| Lead Count | 16 leads |
| 安裝類型 | Surface mount |
ADM232AARN 16-lead narrow soic 腳位配置指南
ADM232AARN（16-lead narrow 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： ADM232AARN.
請參閱 資料表 以查看完整腳位配置。
典型應用
ADM232AARN 適用於 6 應用s: Industrial Serial Control Interface, Point-of-Sale Terminal Connectivity, Data Acquisition and Instrumentation, Embedded Equipment Service Port, Telecommunications Network Equipment, RS-232 Test and Measurement Adapter.
Industrial Serial Control Interface
The ADM232AARN fits industrial equipment that must retain a legacy RS-232 control or service port while operating from a 5 V logic rail. Its two drivers and two receivers support two bidirectional channels per package, and the documented 200 kB/s rate provides useful throughput for configuration transfers and diagnostic data. The integrated charge pump produces bipolar RS-232 levels from the 5 V supply, avoiding a separate negative rail. Keep the charge-pump capacitors near their pins and verify temperature, grounding, and surge requirements at the enclosure level.
推薦
Point-of-Sale Terminal Connectivity
The ADM232AARN is appropriate for point-of-sale terminals, scanners, and service peripherals that use RS-232 connections alongside 5 V digital electronics. Two integrated transceiver channels reduce the number of interface packages, while the 200 kB/s maximum rate supports command exchange and burst traffic more effectively than slow legacy serial links. Its 16-lead narrow SOIC footprint leaves board area for connectors and power circuitry. Place protection components at the connector boundary and route the driver outputs away from processor clocks and sensitive sensor inputs.
推薦
Data Acquisition and Instrumentation
The ADM232AARN can connect laboratory instruments, data-acquisition controllers, and service computers where a compact, high-speed RS-232 port is required. The 200 kB/s rate accommodates measured data transfer and control commands, while two receivers and two drivers allow multiple device channels where wiring permits. Operation from one 5 V rail simplifies analog and digital power planning. For measurement accuracy, use a defined common ground, keep return-current paths short, and isolate the interface when the connected equipment uses a different ground reference.
推薦
Embedded Equipment Service Port
The ADM232AARN is well suited to embedded instruments that require a service, configuration, or diagnostic port without adding a negative power supply. Its integrated charge pump and 0.1 uF capacitors simplify the analog side of a 5 V design, and the narrow 16-SOIC package is useful where connector placement is constrained. The 200 kB/s rate supports firmware upload and status reporting during maintenance. Design the port so disabled or unused channels are handled according to the pin definitions, and verify the interface remains stable during hot-plug or ground-offset conditions.
推薦
Telecommunications Network Equipment
The ADM232AARN can support control, provisioning, and diagnostic ports in telecommunications equipment where RS-232 remains common for field-service access. A single 5 V supply and an integrated charge pump reduce power-tree complexity, while the 200 kB/s rate supports firmware transfer and configuration commands. Two drivers and two receivers provide efficient use of a narrow SOIC footprint. Keep cable transient protection close to the connector and maintain a short ground return, since the RS-232 receiver’s 30 V input tolerance does not replace external surge protection.
推薦
RS-232 Test and Measurement Adapter
The ADM232AARN is a practical choice for compact test adapters that convert a 5 V host interface to a standard RS-232 port. Its 200 kB/s capability supports automated control commands and moderate data transfer, while the integrated charge pump avoids requiring a separate negative-voltage generator. Two channels can serve two instruments or provide receive-only and transmit-only functions when circuit requirements allow. Validate logic levels, enable states, and unused inputs in the host interface, and use connector-side protection when the cable can extend outside the enclosure.
推薦
推薦產品摘要
工程參考資料，適用於 ADM232AARN — 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 | ADM232LAR | ADM231LAR | MAX232ECD |
|---|---|---|---|---|
| Package | 16-SOIC (narrow) | 16-SOIC (narrow) | 16-SOIC (narrow) | 16-SOIC (narrow) |
| Brand | Analog Devices | Analog Devices | Analog Devices | Maxim Integrated |
| Device Architecture | Two RS-232 drivers and two receivers | Dual RS-232 driver and receiver | Dual RS-232 transceiver | Dual RS-232 driver and receiver |
主要差異化特點
- Higher documented throughput than the ADM232L-family option (對比ADM232LAR)
- Same-manufacturer alternative preserves the narrow SOIC footprint (對比ADM232LAR)
- Integrated dual-channel interface reduces package count (對比MAX232ECD)
設計說明
Place the two 0.1 uF charge-pump capacitors close to their designated pins and keep their return paths short. The capacitors convert the 5 V supply into the bipolar voltage used by the drivers, so long or narrow power traces can degrade supply integrity and contribute to transmission errors. Follow the capacitor type, tolerance, and connection arrangement shown in the manufacturer application circuit, and avoid placing sensitive analog nodes between the capacitor and IC pins.
Do not assume that a 16-lead SOIC footprint proves pin compatibility. Verify every power, ground, driver-output, receiver-input, and enable-related connection against the manufacturer pin-description table for the exact replacement MPN. Also confirm supply voltage, charge-pump capacitor value, receiver thresholds, and output levels. A footprint match can still require schematic and waveform validation before approving a substitution.
Route each RS-232 driver output directly toward its connector and keep it away from clocks, ADC inputs, and other low-level analog traces. Maintain a continuous ground reference between connected equipment because the interface provides voltage-level conversion rather than galvanic isolation. For external cables, place transient protection near the connector and use the receiver’s 30 V input tolerance as operating margin rather than as a substitute for surge protection.
合規資訊
The Analog Devices product and datasheet pages do not explicitly state the requested compliance fields. EIA-232-E and V.28 are interface specifications rather than material-compliance declarations.
