ADM208ANZ - 4/4 RS-232 Transceiver, 200 kbps | Analog Devices
MPN： ADM208ANZ ✓ 啟用中ADM208ANZ 概覽
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.
直接替換替代品，適用於 ADM208ANZ — 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： ADM208ANZ （相同外形與佔位） — 差異在於 Package, Maximum Data Rate, Nominal Supply Voltage, Number of Drivers, Number of Receivers.
ADM208EANZ
✅ 直接替換📋 參考替代品（不在目錄中）
ADM207EANZ
✅ 直接替換📋 參考替代品（不在目錄中）
ADM236LJN
✅ 直接替換聯絡詢價
查看資料表 →ADM238LANZ
✅ 直接替換📋 參考替代品（不在目錄中）
ADM239LANZ
✅ 直接替換📋 參考替代品（不在目錄中）
ADM208ANZ 規格
| Driver / Receiver Configuration | 4 / 4 |
| Transceiver Type | Full RS-232 |
| 供應電壓 | 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 |
| 封裝 | 24-pin PDIP, 0.300 inch (7.62 mm) pitch |
| 腳位數 | 24 pins |
| 安裝類型 | Through-hole |
| 工作溫度 | -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 腳位配置指南
ADM208ANZ（24-pin pdip, 0.300 inch (7.62 mm) pitch 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： ADM208ANZ.
請參閱 資料表 以查看完整腳位配置。
典型應用
ADM208ANZ 適用於 6 應用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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
推薦產品摘要
工程參考資料，適用於 ADM208ANZ — 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 | 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 |
主要差異化特點
- Eight integrated RS-232 channels (對比ADM207EANZ)
- Direct 5 V implementation (對比ADM236LJN)
- Production-family 200 kbps operation (對比ADM208EANZ)
設計說明
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.
合規資訊
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.
