ADM208ANZ - 4/4 RS-232 Transceiver, 200 kbps | Analog Devices
料号： ADM208ANZ ✓ 量产中ADM208ANZ 概述
An RS-232 transceiver is an interface IC that converts logic-level signals into RS-232-compatible levels and converts received RS-232 levels back into digital logic. The ADM208ANZ combines four drivers and four receivers in one package, reducing the number of interface components required in multi-port equipment. It is particularly useful when the design must generate bipolar RS-232 voltages from a single 5 V supply.
Key features include four drivers and four receivers, 200 kbps maximum data rate, single +5 V CMOS supply operation, and integrated on-board dc-to-dc converters that produce approximately ±9 V output swing. Only 0.1 µF capacitors are required for charge-pump operation. The industrial-grade option operates across a -40°C to +85°C temperature range and is supplied in a through-hole PDIP package.
The ADM208ANZ architecture allows a compact RS-232 implementation without external bipolar power rails. Its four transmitters add RS-232-level outputs for outbound serial data, while its four receivers accept incoming RS-232 signals. Because the interface combines eight channels in one device, designers can support multiple connections while limiting the number of data-conversion ICs and associated board area.
Typical applications include industrial data acquisition, test and measurement equipment, barcode and point-of-sale systems, computer peripheral interfaces, and embedded control systems communicating with legacy RS-232 equipment. For each channel, the logic-side ground, driver outputs, receiver inputs, supply rails, and charge-pump capacitors must be routed according to the manufacturer's application diagram.
When laying out the board, place the 0.1 µF charge-pump capacitors close to their designated pins and keep RS-232 traces away from sensitive analog or high-speed digital paths. Use the receiver and driver enable or shutdown controls only after confirming the exact behavior of the selected ordering code. Maintain suitable ground-return paths and observe the absolute maximum ratings in the manufacturer datasheet.
This product page combines the Analog Devices product information, distributor package details, RS-232 interface context, practical application guidance, and same-package replacement analysis. It is intended to help engineers verify supply, channel count, package, speed, pinout, and lifecycle considerations before integrating the ADM208ANZ into a serial interface design.
直接替换替代料： ADM208ANZ ——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： ADM208ANZ （相同外形与封装尺寸） ——差异在于 Package, Maximum Data Rate, Nominal Supply Voltage, Number of Drivers, Number of Receivers.
ADM208EANZ
✅ 直接替换📋 参考替代料（不在目录中）
ADM207EANZ
✅ 直接替换📋 参考替代料（不在目录中）
ADM236LJN
✅ 直接替换联系询价
查看数据手册 →ADM238LANZ
✅ 直接替换📋 参考替代料（不在目录中）
ADM239LANZ
✅ 直接替换📋 参考替代料（不在目录中）
ADM208ANZ 规格参数
| Driver / Receiver Configuration | 4 / 4 |
| Transceiver Type | Full RS-232 |
| 电源电压 | 4.5 V to 5.5 V |
| Nominal Supply Voltage | +5 V |
| Maximum Data Rate | 200 kbps |
| Charge-Pump Capacitor Value | 0.1 µF |
| On-Board DC-to-DC Output Swing | ±9 V |
| 封装 | 24-pin PDIP, 0.300 inch (7.62 mm) pitch |
| 引脚数量 | 24 pins |
| 安装类型 | Through-hole |
| 工作温度 | -40°C to +85°C |
| Temperature Grade | Industrial |
| Packaging | Tube |
| Lead-Free Status | Lead-free |
| Protocol | RS-232 |
| Logic Technology | CMOS |
| Number of Drivers | 4 |
| Number of Receivers | 4 |
| RS-232 Output Level | Approximately ±9 V |
| Product Family | ADM208 |
ADM208ANZ 24-pin pdip, 0.300 inch (7.62 mm) pitch 引脚配置指南
ADM208ANZ（24-pin pdip, 0.300 inch (7.62 mm) pitch 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： ADM208ANZ.
请参阅 数据手册 以查看完整引脚配置。
典型应用
ADM208ANZ 适用于 6 应用s: Industrial Data Acquisition, Test and Measurement Equipment, Point-of-Sale and Barcode Systems, Embedded Control Systems, Computer Peripherals and Legacy Interfaces, Security and Surveillance Systems.
Industrial Data Acquisition
The ADM208ANZ fits industrial data-acquisition equipment that must retain several legacy RS-232 ports while using modern 5 V logic. Four drivers and four receivers allow four full-duplex channels, and the 200 kbps rate is appropriate for supervisory commands, configuration transfers, and moderate-rate instrument data. Its -40°C to +85°C industrial range supports temperature-controlled factory equipment. Place the 0.1 µF charge-pump capacitors close to their assigned pins and route the approximately ±9 V driver outputs away from sensitive measurement circuitry.
推荐
Test and Measurement Equipment
The ADM208ANZ is useful in test and measurement instruments that expose multiple RS-232 control or data ports to a host computer. The four-driver, four-receiver arrangement can consolidate four full-duplex links, while operation from a single 5 V supply simplifies internal power distribution. The 200 kbps maximum rate accommodates routine command traffic and instrument status data rather than high-bandwidth streaming. Designers should maintain separate logic and RS-232 routing zones, provide a solid reference ground, and follow the manufacturer's charge-pump capacitor placement guidance.
推荐
Point-of-Sale and Barcode Systems
The ADM208ANZ suits point-of-sale terminals, scanners, and peripheral controllers that need several RS-232 connections from a compact interface section. It provides four drivers and four receivers at up to 200 kbps, which is sufficient for cash drawers, barcode scanners, scales, and customer displays operating with short command sequences. The 24-pin PDIP package can simplify through-hole assembly and repair. Maintain adequate separation between driver outputs and low-level logic or display circuitry, and configure unused channels according to the manufacturer pin descriptions.
推荐
Embedded Control Systems
The ADM208ANZ can connect an embedded controller or industrial controller to multiple RS-232 peripherals through four full-duplex channels. The single 5 V supply and integrated charge pumps avoid requiring a separate negative supply rail, while the 200 kbps rate supports configuration, telemetry, and control traffic. The industrial temperature range covers demanding equipment environments. Firmware and hardware designers should allow for RS-232 logic inversion at the receiver, use the device's enable controls only after checking their exact electrical states, and validate grounding between communicating systems.
推荐
Computer Peripherals and Legacy Interfaces
The ADM208ANZ is appropriate for equipment that must bridge modern digital logic to legacy computer peripherals through RS-232. Its four transmitters and four receivers support multiple links without duplicating complete interface circuits, while the 200 kbps rate is more than sufficient for printers, service consoles, and control adapters. A 5 V system can use the integrated charge-pump converters to produce the required bipolar transmit level. Keep the PCB's RS-232 traces physically separated from clocks, reset lines, and sensitive analog inputs to reduce coupling.
推荐
Security and Surveillance Systems
The ADM208ANZ can support RS-232 control or telemetry links in surveillance systems that retain legacy camera and access-control equipment. Four full-duplex channels can connect multiple panels or peripheral controllers, and 200 kbps is suitable for command traffic and status updates. The -40°C to +85°C rating is useful in equipment rooms and outdoor cabinets with thermal management. Because driver outputs swing to approximately ±9 V, maintain creepage and clearance appropriate to the enclosure, while keeping these nets away from sensitive sensor wiring.
推荐
推荐产品汇总
工程参考数据： ADM208ANZ ——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 | ADM208EANZ | ADM207EANZ | ADM236LJN | ADM238LANZ | ADM239LANZ |
|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 24-pin PDIP | 24-pin PDIP | 24-pin PDIP | 24-pin PDIP | 24-pin PDIP | 24-pin PDIP |
| RS-232 Protocol | RS-232 | RS-232 | RS-232 | RS-232 | RS-232 | RS-232 |
| Mounting Type | Through-hole | Through-hole | Through-hole | Through-hole | Through-hole | Through-hole |
关键差异点
- Eight integrated RS-232 channels （对比 ADM207EANZ)
- Direct 5 V implementation （对比 ADM236LJN)
- Production-family 200 kbps operation （对比 ADM208EANZ)
设计说明
Place the two 0.1 µF charge-pump capacitors close to the pins identified in the ADM208 application circuit. Keep their ground paths short and avoid routing high-current digital return paths beneath the capacitors. The approximately ±9 V driver outputs should occupy a separate routing region from sensitive analog inputs and low-level logic. Check clearances against the board fabrication rules when exposed connectors or coated humidity is a consideration.
Do not assume that every 24-pin RS-232 IC is electrically interchangeable. The ADM208EANZ has family-level enable and shutdown features that may change pin behavior, while ADM207EANZ and ADM236LJN have different driver and receiver counts. Before modifying a PCB, compare each power pin, charge-pump pin, driver output, receiver input, enable input, shutdown input, and unused-pin recommendation against the exact manufacturer data sheet.
Connect each RS-232 signal to its corresponding logic-side interface with a short, direct route and keep the two sides of the interface physically separated. Use a continuous reference or ground plane where appropriate, but return current should not share high-current paths with the charge-pump network. If a cable leaves the board, add the protection appropriate to the installation environment and ensure the transceiver is not exposed to voltages beyond its absolute maximum ratings.
RS-232 receivers can respond to transitions on adjacent logic or clock nets even when the cable side is quiet. Route sensitive receiver inputs away from switching nodes and keep driver outputs and charge-pump connections out of the receiver-input region. Maintain a practical ground connection between communicating equipment, and verify signal levels and timing at the receiver with an oscilloscope when integrating a new peripheral or long cable.
Decouple the 5 V supply close to the device using the capacitance and placement specified by the manufacturer application diagram. The ADM208 generates approximately ±9 V output swing internally, so external ±12 V rails are not required, but supply bypassing remains important for stable driver transitions. Check the 4.5 V to 5.5 V operating range at the IC pins rather than assuming the nominal 5 V rail is always sufficient under transient load.
合规信息
The ADM208ANZ is identified as a lead-free 24-pin PDIP component. RoHS, REACH, halogen-free, and conflict-minerals declarations are not specified in the available product records. AEC-Q100 is not applicable to this industrial RS-232 transceiver.
