ADM231LAN - 2/2 5V RS-232 Transceiver | Analog Devices
Teilenummer: ADM231LAN ✗ AbgekündigtADM231LAN Übersicht
An RS-232 transceiver is an interface IC that combines a transmitter and receiver with the voltage conversion required at a serial port boundary. The transmitter converts logic-level signals into RS-232-compatible levels, while the receiver converts incoming RS-232 levels back into CMOS-compatible signals. Within the broader semiconductor hierarchy, an RS-232 transceiver belongs to the interface IC family, alongside UARTs, level translators, isolated communication interfaces, and other data-communication components. The ADM231LAN combines two channels in each direction in one package.
The principal feature is its two-driver, two-receiver arrangement. Its +5 V CMOS architecture avoids the need for a separate bipolar ±12 V power supply, reducing board complexity in systems where the host or controller already operates from +5 V. The manufacturer's Rev. C datasheet states that the family supports EIA-232-E and V.28 interfaces. It also identifies high slew rates and operation at data rates up to 100 kbps under worst-case loading conditions, making the device suitable for moderate-speed point-to-point serial links.
The internal architecture uses charge-pump voltage generation to produce the bipolar signal levels required by RS-232 from one low-voltage supply. Each driver must still handle the voltage and current behavior of an RS-232 connection, including the possibility of a shorted or misconnected cable. The receiver provides the thresholding required to interpret bipolar RS-232 levels as valid logic states. Although the device eliminates external negative-supply generation, its communication performance still depends on correct supply bypassing, controlled-impedance interconnects, and appropriately terminated connector-side networks.
Typical uses include industrial control links, point-of-sale equipment, data-acquisition systems, embedded serial ports, and legacy computer interfaces that cannot accept modern ±12 V RS-232 levels directly. It can also serve as a bridge between a +5 V CMOS controller and an RS-232 host, provided that the system observes the family's specified data-rate, supply, temperature, and package constraints. The ADM231LAN's lifecycle status is obsolete, so new production designs should verify current replacement availability before committing a PCB layout to it.
The primary design consideration is package migration. The 14-lead plastic dual in-line package is relatively large and not as assembly-efficient as modern leadless or surface-mount interface packages. The 100 kbps capability is suitable for many control and instrumentation links but is not appropriate for higher-bandwidth protocols. Because the part is obsolete, engineers should evaluate listed drop-in candidates by pinout, driver and receiver count, supply voltage, data rate, and transceiver shutdown behavior rather than selecting a substitute solely by the RS-232 label.
This product page combines verified manufacturer and distributor information with lifecycle context, application guidance, technical comparisons, and practical replacement-selection criteria. It distinguishes documented facts from unavailable parameters, highlights the ADM231LAN's +5 V two-driver/two-receiver architecture, and identifies the package and supply constraints that most affect drop-in replacement decisions.
Drop-in-Alternativen für ADM231LAN – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Für dieses Produkt sind keine Drop-in-Alternativen verfügbar.
Alternativen anfordernADM231LAN Technische Daten
| Product Type | RS-232 transceiver |
| Driver Count | 2 drivers |
| Receiver Count | 2 receivers |
| Versorgungsspannung | +5 V |
| Logic Technology | CMOS |
| Driver Signal Levels | Approximately ±5 V |
| Maximum Data Rate | 100 kbps |
| Interface Standards | EIA-232-E and V.28 |
| Gehäuse | 14-lead plastic dual in-line package |
| Montageart | Through-hole |
| Low-Power Operation | Low-power +5 V CMOS design |
ADM231LAN 14-lead plastic dual in-line package Pinbelegungsleitfaden
Pinbelegung für ADM231LAN (14-lead plastic dual in-line package-Gehäuse). Pin-Nummerierung, Funktionen und Anschlussdiagramme sind im Herstellerdatenblatt definiert. Entnehmen Sie diesem den genauen Footprint und Lötrichtlinien.
Keine detaillierten Pinbelegungsdaten verfügbar für ADM231LAN.
Siehe die Datenblatt für die vollständige Pin-Konfiguration.
Typische Anwendungen
ADM231LAN ist geeignet für 6 Anwendungs: Industrial Control Serial Links, Point-of-Sale Equipment, Data-Acquisition Equipment, Embedded Serial Port Expansion, Instrumentation and Test Equipment, Legacy Computer Peripherals.
Industrial Control Serial Links
The ADM231LAN is suitable for legacy industrial control equipment that uses an RS-232 port but has only a +5 V controller supply. Its two drivers and two receivers support two communication paths in a single package, while the internal circuitry produces the bipolar levels required by the interface without a separate ±12 V rail. The documented 100 kbps rate is appropriate for supervisory commands, parameter transfers, and configuration traffic rather than high-bandwidth data. Because the ADM231LAN is obsolete, an existing installation can retain it during repair, but a new control platform should verify current substitutes against the 14-lead footprint and industrial temperature requirements.
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Point-of-Sale Equipment
The ADM231LAN can bridge a +5 V embedded controller to a legacy point-of-sale or peripheral interface using RS-232. Two driver and two receiver channels provide flexibility for bidirectional communication with compatible equipment, while the single +5 V supply simplifies integration with CMOS-based control boards. Its documented limit of 100 kbps is suitable for transaction commands, status information, and receipt or peripheral exchanges. New point-of-sale designs should account for the obsolete lifecycle, ESD exposure at the connector, and the fact that observed in-stock inventory does not guarantee future production supply.
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Data-Acquisition Equipment
ADM231LAN fits legacy data-acquisition systems in which a controller must communicate with a remote module over RS-232. The +5 V architecture is valuable when the acquisition controller has no available negative supply, and the two transmitters and receivers can support command and measurement paths in a compact circuit. Its 100 kbps maximum data rate is adequate for sampled values, configuration commands, and periodic status reports when the overall acquisition protocol does not require higher throughput. Engineering teams should validate cable length, connector protection, ground continuity, and the receiver thresholds in the complete Analog Devices Rev. C datasheet.
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Embedded Serial Port Expansion
The ADM231LAN can expand a +5 V embedded controller's serial connectivity by adding two RS-232 drivers and two receivers in a 14-lead package. This is useful in legacy instrumentation where the host processor provides only TTL or CMOS logic but downstream equipment expects an RS-232 connection. The device supports EIA-232-E and V.28 communication, and its stated 100 kbps rate fits supervisory or configuration traffic. The primary caution is assembly and lifecycle: the through-hole package occupies more PCB area than a surface-mount alternative, and the obsolete designation requires a documented supply and obsolescence plan.
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Instrumentation and Test Equipment
The ADM231LAN is applicable to legacy instrumentation that communicates with a host computer through RS-232 while operating internally from +5 V. Its two transmitters and two receivers allow multiple instrument connections to be consolidated, and the 100 kbps capability is suitable for remote commands and moderate data exchange. The transceiver reduces the need for external charge-pump circuitry at the system level, although external protection and filtering may still be needed for cables connected to industrial environments. Because the part is obsolete, instrumentation service teams should secure traceable stock and confirm the exact 14-pin layout against the manufacturer documentation.
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Legacy Computer Peripherals
The ADM231LAN is applicable when repairing or maintaining legacy computer peripherals that use RS-232 but lack a modern multi-voltage interface controller. A +5 V embedded controller can use the transceiver's two transmit and two receive channels to connect to an RS-232 host while avoiding a separate negative supply stage. The device's 100 kbps rating suits configuration and status protocols common in older peripheral equipment. For new designs, engineers should compare modern surface-mount transceivers and verify shutdown, protection, and logic-level requirements rather than assuming that any two-driver, two-receiver RS-232 IC is pin compatible.
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Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für ADM231LAN – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt |
|---|---|
| Brand | Analog Devices |
| Package | 14-lead plastic dual in-line package |
| Product Type | RS-232 transceiver |
| Driver Count | 2 drivers |
| Receiver Count | 2 receivers |
| Supply Voltage | +5 V |
| Maximum Data Rate | 100 kbps |
| Driver Signal Levels | Approximately ±5 V |
| Interface Standards | EIA-232-E and V.28 |
| Lifecycle Status | Obsolete |
| Verified Unit Price | $3.7937 as of 2026-10-30 |
| Mounting Type | Through-hole |
Wichtigste Unterscheidungsmerkmale
- Integrated four-channel transceiver (vs. Single-channel RS-232 interface families)
- Single-supply RS-232 operation (vs. Conventional discrete RS-232 drivers and receivers)
- Standardized interface support (vs. Unspecified legacy RS-232 implementations)
Designhinweise
Decouple the +5 V supply close to the ADM231LAN with the capacitance and layout specified in the manufacturer's Rev. C data sheet and application guidance. The internal charge pump creates bipolar RS-232 signal levels from the single supply, so supply disturbance can affect both transmitted levels and receiver decisions. Keep the RS-232 connector return path close to the signal ground, and evaluate the supply's capability to handle switching current rather than relying only on its average quiescent current.
Do not treat the ADM231LAN and a functionally similar MAX232 or SP232 part as drop-in replacements without comparing every physical pin. The target uses a 14-lead plastic dual in-line package, while the available site candidates include surface-mount devices such as MAX232DR and MAX202IDR. Verify package dimensions, driver inputs, receiver outputs, enable pins, shutdown behavior, and supply connections. A functional match does not establish PCB compatibility.
Place the interface IC and its local bypass capacitor near the supply pins, and route the RS-232 driver and receiver traces away from fast digital clocks and switching-power nodes. Keep the logic-side traces short and use a continuous ground reference beneath the interface area. Because the verified information does not specify the complete pin table or exact external-capacitor values, obtain those details from the manufacturer Rev. C data sheet before releasing the layout.
Compliance-Informationen
The verified snippets identify JEDEC MO-095AG package-dimension compliance for the family, but they do not provide RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declarations. The device is an interface IC and is not presented as an automotive-qualified AEC-Q100 product.
