ADM232AAN - 200kbps Dual RS-232 Transceiver | Analog Devices
Référence : ADM232AAN ✓ ActifADM232AAN Présentation
An RS-232 transceiver is an interface IC that converts between single-ended logic-level signals and the bipolar, differential voltage conventions used by RS-232 equipment. In the broader hierarchy, it belongs to the interface IC category, combines line-driver and line-receiver functions, and provides physical-layer connectivity between computer serial ports, industrial controllers, and communications equipment. The ADM232A family is positioned as a pin-compatible, high-speed upgrade for the AD232 and ADM232L families.
Key features include a 200 kB/s transmission rate, two transmit channels, two receive channels, a single 5 V supply, on-board DC-DC converters, and compatibility with MAX222, MAX232A, and MAX242 pin arrangements. The small 0.1 µF charge-pump capacitors reduce board-space requirements compared with older RS-232 implementations using larger flying capacitors. Receiver inputs tolerate ±30 V, supporting practical protection against larger voltage excursions encountered on an external RS-232 port.
Technically, the charge-pump circuitry generates the positive and negative voltage rails required by RS-232 drivers from the single 5 V source. The ADM232AAN combines this internal supply conversion with CMOS driver and receiver stages. Its 200 kB/s data rate supports legacy serial links substantially above the older 64 kB/s class of interface while retaining the established EIA-232-E and V.28 signaling behavior. Because the ADM232AAN is a 16-lead DIP device, it is intended for through-hole assembly, prototyping, legacy equipment, and industrial control boards where a surface-mount RS-232 footprint would be inconvenient.
Typical applications include industrial serial controllers, test and measurement instruments, point-of-sale equipment, data acquisition systems, legacy computer peripherals, and isolated or non-isolated RS-232 communication ports. In a typical circuit, the IC interfaces a microcontroller UART to a DB9 or other RS-232 connector. Series resistance may be required on driver outputs when the connected cable is unusually long or exposes the port to electrostatic discharge; connector protection should be selected according to the actual cable and installation environment.
Designers should place the charge-pump capacitors close to their specified pins and route the high-current charge-pump paths to minimize switching noise. The 5 V supply must provide adequate transient current, and PCB grounding should preserve a low-impedance return path between the transceiver and connector. Because the ADM232AAN has no integrated isolation barrier, applications requiring galvanic isolation require external isolation components and a suitably isolated power design.
This page combines the verified manufacturer specifications, distributor package identification, cross-reference findings, application guidance, and drop-in replacement criteria. It also distinguishes verified facts from electrical values that were not present in the supplied source data, helping engineers compare replacements without assuming that equivalent function automatically guarantees equivalent layout or system behavior.
Alternatives de remplacement direct pour ADM232AAN — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
ADM222AAN
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
ADM242AAN
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
MAX232APE
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MAX222CPE
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MAX242CPE
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ADM232AAN Spécifications
| Product Type | Dual RS-232 line-driver and line-receiver transceiver |
| Transmission Rate | 200 kB/s |
| Number of Drivers | 2 |
| Number of Receivers | 2 |
| Tension d'alimentation | 5 V |
| Charge-Pump Capacitor Value | 0.1 µF |
| Driver Output Swing | ±9 V with 5 V supply |
| Receiver Input Levels | ±30 V |
| Interface Standard Compliance | EIA-232-E and V.28 |
| Internal Supply Conversion | On-board DC-DC converters |
| Pin Compatibility | Compatible with MAX222, MAX232A, and MAX242 pin arrangements |
| Boîtier | 16-lead plastic DIP |
| Type de montage | Through-hole |
Guide de configuration des broches du ADM232AAN 16-lead plastic dip
Configuration des broches du ADM232AAN (boîtier 16-lead plastic dip). La numérotation des broches, les fonctions et les schémas de connexion sont définis dans la fiche technique du fabricant. Consultez-la pour l'empreinte exacte et les directives de soudage.
Aucune donnée de brochage détaillée disponible pour ADM232AAN.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
ADM232AAN convient pour 6 applications: Industrial Serial Controller, Data Acquisition Equipment, Test and Measurement Instrument, Point-of-Sale Terminal, Legacy Computer Peripheral, Communication Port Interface.
Industrial Serial Controller
The ADM232AAN fits an industrial controller that must connect a 5 V microcontroller UART to an external RS-232 port. Its two drivers and two receivers support bidirectional communication, while the 200 kB/s rate provides more headroom than older low-speed serial interfaces. The single 5 V supply simplifies controller power design because the on-board converters produce the bipolar driver swing. In a practical implementation, place the 0.1 µF charge-pump capacitors close to their pins and provide the bypass and protection required by the connector interface. Verify grounding and cable length because a 200 kB/s transceiver rating does not by itself guarantee reliable communication over every cable.
Recommandé
Data Acquisition Equipment
The ADM232AAN is appropriate for legacy data-acquisition equipment that exchanges commands and measurements through an RS-232 port. Two receivers can monitor separate inbound signals, and two drivers can support outgoing control or status channels. The 200 kB/s rate accommodates moderate command traffic without requiring a newer physical interface, while the 16-lead DIP package simplifies through-hole construction and repairs. At the board level, keep the transceiver close to the serial connector, route the driver outputs away from sensitive analog sections, and add appropriately selected surge protection when the cable leaves the enclosure. The provided data does not specify the device's temperature rating, so industrial environmental requirements must be checked separately.
Recommandé
Test and Measurement Instrument
The ADM232AAN can provide the legacy RS-232 control link found on many oscilloscopes, signal generators, and laboratory instruments. Its two-driver, two-receiver arrangement allows bidirectional command and response traffic, and the 200 kB/s rate is sufficient for many short control protocols. The device also accepts receiver inputs up to ±30 V, providing useful tolerance for larger voltage excursions on the receive side. Place the 16-PDIP transceiver close to the DB9 or screw-terminal interface, maintain a low-impedance ground return, and use external protection if the instrument can be connected to long or unshielded cables.
Recommandé
Point-of-Sale Terminal
The ADM232AAN is usable in point-of-sale terminals and peripheral controllers that retain an RS-232 receipt-printer or service-port connection. A single 5 V supply is convenient for controller boards, and the 200 kB/s rate supports common serial command traffic. Two transmit and two receive channels can also be useful when the terminal interfaces more than one legacy peripheral. The through-hole DIP package is straightforward for cost-sensitive controller boards assembled by through-hole processes, although a modern surface-mount package may be preferable in space-constrained products. Keep the serial return grounded near the connector and add cable-side protection appropriate to the installation environment.
Recommandé
Legacy Computer Peripheral
The ADM232AAN supports retrofit and repair boards that connect legacy computer serial ports to printers, programmers, or service equipment. Its 200 kB/s transmission rate accommodates conventional RS-232 command and data links, while the ±30 V receiver input rating improves tolerance to external voltage excursions. The 16-lead plastic DIP format matches many through-hole interface layouts and makes replacement practical where a surface-mount redesign would be undesirable. Because the part does not provide galvanic isolation, ground-potential differences between connected equipment can affect operation; an external isolation solution is needed when reliable communication across isolated grounds is mandatory.
Recommandé
Communication Port Interface
The ADM232AAN is suitable for communication equipment requiring a compact two-channel RS-232 port on a 5 V board. Two drivers and two receivers allow simultaneous transmit and receive paths, and the 200 kB/s rate is well matched to many configuration and status protocols. The on-board DC-DC conversion eliminates a separate negative rail, reducing system complexity compared with discrete driver implementations. Designers should route charge-pump current loops compactly to limit conducted and radiated emissions, observe the manufacturer's capacitor placement guidance, and provide connector protection for exposed ports. The verified 16-PDIP package supports through-hole industrial boards and prototype assemblies where connector spacing favors DIP components.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour ADM232AAN — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | ADM222AAN | ADM242AAN | MAX232APE | MAX222CPE | MAX242CPE |
|---|---|---|---|---|---|---|
| Package | 16-lead plastic DIP | 16-lead plastic DIP | 16-lead plastic DIP | 16-lead plastic DIP | 16-lead plastic DIP | 16-lead plastic DIP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Transmission Rate | 200 kB/s | 200 kB/s | 200 kB/s | 200 kB/s | 200 kB/s | 200 kB/s |
| Driver Count | 2 | 2 | 2 | 2 | 2 | 2 |
| Receiver Count | 2 | 2 | 2 | 2 | 2 | 2 |
Principaux différenciateurs
- Provides the complete dual RS-232 interface in one device (vs MAX232APE)
- Uses small 0.1 µF charge-pump capacitors (vs ADM222AAN)
- Receiver inputs tolerate voltages up to ±30 V (vs ADM242AAN)
- Ships in a 16-lead plastic DIP through-hole package (vs MAX222CPE)
Notes de conception
Place the two 0.1 µF charge-pump capacitors close to the pins designated by the manufacturer datasheet. Keep these high-current switching loops compact and route them away from receiver inputs and sensitive analog traces. The ADM232AAN generates bipolar driver voltages from the 5 V rail through charge-pump circuitry, so long or shared return paths can increase emissions and reduce noise margin in the surrounding board.
Decouple the 5 V supply locally and verify that it can support the transient current associated with the charge pump. A single 5 V source eliminates the need for a separate negative supply, but adequate input bypassing remains necessary for stable driver output and receiver operation. Follow the datasheet's recommended capacitor values, voltage ratings, and placement rather than substituting bulk capacitance without checking stability or inrush behavior.
Do not infer that every MAX232-family device is automatically interchangeable. The verified source identifies pin compatibility with MAX222, MAX232A, and MAX242, but individual orderable variants may differ in shutdown, enable, temperature grade, package, and exposed-pad requirements. Confirm the exact schematic, package drawing, and pin table for the proposed replacement before approving a drop-in substitution.
Use a continuous ground plane and provide a short return path between the transceiver ground and connector shell or signal ground. Long serial cables can carry common-mode and electrostatic-discharge transients, so add appropriately rated protection at the connector boundary when exposed to user-accessible ports. Keep protection-device capacitance low enough to preserve the selected data rate and do not rely on the receiver's ±30 V input tolerance as a substitute for external protection.
Informations de conformité
The supplied manufacturer and distributor data did not state the RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status for ADM232AAN. EIA-232-E and V.28 are interface specifications, not environmental or material compliance declarations.
