ADM242ANZ - 200 kbps 2/2 RS-232 IC | Analog Devices
MPN： ADM242ANZ ✓ 啟用中ADM242ANZ 概覽
An RS-232 transceiver is an interface IC that combines digital line drivers and receivers for serial communication over unbalanced point-to-point connections. The driver converts TTL or CMOS logic signals into RS-232 bipolar levels, while the receiver converts bipolar line signals back into logic-level voltages. The ADM242ANZ belongs to the broader interface IC hierarchy, where it bridges modern digital logic and legacy serial equipment.
The ADM242ANZ includes two drivers and two receivers, allowing two communication channels to be implemented with one device. Its 200 kB/s signaling rate supports higher-throughput serial links than slower RS-232 transceivers while retaining the broad compatibility of the RS-232 standard. The single 5 V supply simplifies system power design, and the charge-pump architecture avoids a separate negative supply for bipolar driver output.
Two 0.1 µF charge-pump capacitors are required to operate the integrated voltage converter. According to the Analog Devices ADM242 family datasheet, the device meets EIA-232-E and V.28 specifications. This makes the interface appropriate for equipment requiring standardized RS-232 electrical behavior, including instrumentation, industrial control, data acquisition, and legacy peripheral connections.
Typical uses include two-channel RS-232 links in test equipment, factory automation controllers, barcode and labeling systems, point-of-sale equipment, and embedded serial-port systems. The two-channel arrangement is particularly useful when a system needs both transmit and receive paths on each of two RS-232 ports while keeping the external component count low.
When laying out a design, place the charge-pump capacitors close to their designated pins and provide a clean 5 V supply with local high-frequency bypass. RS-232 is an unbalanced interface, so cable routing and grounding can affect noise immunity. Confirm that the selected connector, cable, and remote equipment use compatible RS-232 signal levels before deployment.
This page combines the verified ADM242ANZ specifications, package information, sourcing guidance, and practical interface-design considerations. It also distinguishes the available pin-compatible family option from broader functional equivalents, helping engineers assess replacement decisions without changing the PCB footprint.
直接替換替代品，適用於 ADM242ANZ — 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： ADM242ANZ （相同外形與佔位） — 差異在於 Number of Drivers, Number of Receivers, Package, Product Type.
ADM242ANZ 規格
| Product Type | RS-232 line driver/receiver transceiver (interface IC) |
| Number of Drivers | 2 drivers |
| Number of Receivers | 2 receivers |
| Maximum Transmission Rate | 200 kB/s |
| Supply Voltage Range | 4.5 V to 5.5 V |
| Nominal Supply Voltage | 5 V |
| Charge-Pump Capacitor | 0.1 µF |
| Protocol | RS-232 (EIA-232-E and V.28 specifications) |
| Duplex | Full duplex |
| 封裝 | 18-pin PDIP, 7.62 mm pitch |
| 安裝類型 | Through-hole |
| Packaging | Tube |
| Lead-Free Status | Lead-free |
ADM242ANZ 18-pin pdip, 7.62 mm pitch 腳位配置指南
ADM242ANZ（18-pin pdip, 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： ADM242ANZ.
請參閱 資料表 以查看完整腳位配置。
典型應用
ADM242ANZ 適用於 6 應用s: Industrial Instrument Serial Interfaces, Point-of-Sale Terminal Connectivity, Data Acquisition and Test Equipment, Factory Automation Controllers, Barcode and Labeling Systems, Legacy Computer and Peripheral Upgrade.
Industrial Instrument Serial Interfaces
The ADM242ANZ is well suited to legacy industrial instruments that expose a 5 V RS-232 port. Its 200 kB/s maximum transmission rate provides useful throughput for configuration uploads, measurement results, and diagnostic commands, while the two-driver, two-receiver arrangement can support two full-duplex links. The 18-pin PDIP format is useful for repair and legacy-control boards that use through-hole construction. Confirm cable grounding and logic levels at the connector because RS-232 is an unbalanced interface susceptible to noise and ground-potential differences.
推薦
Point-of-Sale Terminal Connectivity
Point-of-sale terminals and peripheral controllers often rely on RS-232 for receipt printers, scales, scanners, and service consoles. The ADM242ANZ combines two transmit and two receive paths in one 18-pin PDIP device, reducing the number of interface packages needed for a multiport design. Its 200 kB/s rate is appropriate for short transactional exchanges, configuration data, and status reporting. Place the charge-pump capacitors near the device and keep the RS-232 traces away from switching nodes to improve field reliability.
推薦
Data Acquisition and Test Equipment
The ADM242ANZ can serve as the communications interface in data-acquisition and test equipment that must exchange sampled data or commands with a host computer. The 200 kB/s signaling rate supports responsive serial control, while two full-duplex channels can separate primary and auxiliary communication paths. The single 5 V supply simplifies instrumentation power trees, and the 18-pin PDIP package remains practical for industrial motherboards. Validate receiver thresholds, cable length, and grounding against the equipment enclosure and grounding architecture.
推薦
Factory Automation Controllers
Factory automation controllers can use the ADM242ANZ for service consoles, programming stations, and RS-232-connected production equipment. Its two-driver, two-receiver configuration supports two full-duplex channels, and the 200 kB/s rate accommodates moderate command and status traffic. The through-hole PDIP package is suitable for industrial controller boards that favor through-hole assembly and straightforward inspection. Use shielded cable, a defined reference ground, and appropriately placed surge protection when the port connects to external equipment.
推薦
Barcode and Labeling Systems
Barcode readers, label printers, and handheld configuration tools can use RS-232 for command-and-response communication. The ADM242ANZ provides enough channel capacity for separate transmit and receive functions across two ports, while the 200 kB/s rate supports rapid transfer of short transaction data and setup commands. The single 5 V operating supply aligns with embedded controller logic. Keep connector-side surge protection and cable routing outside the sensitive transceiver area, especially when the equipment shares a power bus with motors or printers.
推薦
Legacy Computer and Peripheral Upgrade
The ADM242ANZ is useful for adding or restoring a serial port to legacy computers, service equipment, and industrial peripherals that previously used RS-232. Two drivers and two receivers allow two bidirectional channels without separate driver and receiver packages. Its 200 kB/s maximum rate exceeds common low-speed modem-style command links, while the PDIP package fits many older through-hole motherboard layouts. Verify connector gender, signal assignment, and cable standards before replacing an existing port because those choices are not defined by the integrated circuit package itself.
推薦
推薦產品摘要
工程參考資料，適用於 ADM242ANZ — 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 | ADM242AN |
|---|---|---|
| Brand | Analog Devices | Analog Devices |
| Package | 18-pin PDIP | 18-pin PDIP |
| Maximum Transmission Rate | 200 kB/s | 200 kB/s |
| Number of Drivers | 2 drivers | 2 drivers |
| Number of Receivers | 2 receivers | 2 receivers |
| Duplex | Full duplex | Full duplex |
主要差異化特點
- Combines two full-duplex channels in one through-hole package (對比ADM242AN)
- Supports 200 kB/s RS-232 signaling (對比ADM242AN)
- Uses a single 5 V supply with integrated charge pump (對比ADM242AN)
設計說明
Place the two 0.1 µF charge-pump capacitors close to their corresponding ADM242ANZ pins and use short, direct traces. Keep the supply bypass capacitor at the device's 5 V pin with a low-inductance ground return. Avoid routing the bipolar driver outputs alongside digital clocks, switch-node currents, or high-speed memory traces because RS-232 driver transitions can couple into adjacent signals.
Do not treat RS-232 as a differential interface. The ADM242ANZ provides bipolar signaling on an unbalanced connection, so ground-potential differences between connected systems can affect noise immunity or cause communication errors. Use the connector shield and reference-ground strategy defined by the equipment standard, and verify that the cable, connector pinout, and remote equipment agree before energizing the interface.
Keep the RS-232 connector and transceiver interface away from motors, relay coils, switching regulators, and high-current return paths. Provide a direct chassis or signal-ground path according to the enclosure design and apply appropriate connector-side protection when the cable leaves the equipment. If both driver outputs are used, route them as matched, nonsensitive communication nets rather than high-speed digital lines.
The ADM242ANZ operates from 4.5 V to 5.5 V, so ensure that supply tolerance and transient excursions remain within that range. The integrated charge pump supplies the driver voltage swings, but the device still requires a stable external 5 V rail. Decouple the supply locally and keep the 0.1 µF charge-pump capacitors within the manufacturer layout guidance to maintain intended transmission behavior.
合規資訊
The verified part information identifies the ADM242ANZ as lead-free, but no definitive RoHS, REACH, halogen-free, or conflict-minerals statement was established.
