ADM208AN - 4/4 RS-232 Transceiver, 5V, 24-PDIP | Analog Devices
MPN: ADM208AN ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.53 | $2.53 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
ADM208AN Overview
An RS-232 transceiver is an interface IC that combines differential line drivers and receivers for point-to-point serial communication. In the broader electronics hierarchy, it belongs to interface ICs and communications transceivers rather than power-management or logic devices. The ADM2xx family translates between low-voltage digital logic levels and the voltage levels used by RS-232 links, while internal charge-pump circuitry generates the required negative transceiver voltage.
Key features include four drivers, four receivers, 120 kbit/s operation from a single +5 V supply, and 9 V output swing. The receiver supports 30 V input levels according to the supplied manufacturer-related snippets. The device is intended for RS-232 links that must tolerate the electrical environment of the EIA-232-E or V.28 standards while avoiding external ±12 V rails. Low-power shutdown and receiver behavior vary by family member, so the exact ADM208AN functions must be verified against its datasheet during design-in.
The ADM208AN uses CMOS drivers and receivers to interface a host UART, microcomputer, or data-acquisition system with an RS-232 cable. Its 120 kbit/s rate is suitable for conventional serial equipment, configuration links, instrumentation, and industrial control links that do not require higher data rates. The 24-pin PDIP package favors through-hole assembly and legacy industrial equipment rather than compact surface-mount designs.
A primary design consideration is ensuring that the external charge-pump capacitors, supply decoupling, grounding, and cable-side protection meet the requirements in the manufacturer datasheet. Because RS-232 is a single-ended, unbalanced interface, cable routing and grounding can affect noise immunity. Do not infer an ESD rating, temperature range, or package dimensions that are not stated in the verified data.
This page consolidates verified manufacturer and distributor information, comparison-ready attributes, and practical RS-232 integration guidance. It distinguishes published facts from parameters requiring verification and is intended to support engineering selection before purchasing the ADM208AN.
Drop-in alternatives for ADM208AN — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with ADM208AN (same form factor and footprint) — differing in Package, Product Type, Supply Voltage, Mounting Type, Data Rate.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ADM208ANZ
✅ Drop-In📋 Reference alternative (not in catalog)
MAX211IDB
✅ Drop-In✓ In Stock
$1.41 / Unit
View Datasheet →MAX211CWI+
✅ Drop-In✓ In Stock
Contact for price
View Datasheet →MAX211CDB
✅ Drop-In✓ In Stock
$3.2251 / Unit
View Datasheet →MAX211CAI+
✅ Drop-In✓ In Stock
$5.3 / Unit
View Datasheet →ADM208AN Specifications
| Product Type | RS-232 transceiver |
| Driver Count | 4 |
| Receiver Count | 4 |
| Supply Voltage | +5 V |
| Data Rate | 120 kbit/s |
| Charge-Pump Capacitor | 0.1 µF |
| Output Swing | 9 V with +5 V supply |
| Receiver Input Levels | 30 V |
| Low Power | 15 mW |
| Power Shutdown | Low-power shutdown feature listed for the ADM2xx family |
| Interface Standard | EIA-232-E and V.28 |
| Package | 24-pin PDIP |
| Mounting Type | Through-hole |
| Technology | CMOS |
ADM208AN 24-pin pdip Pin Configuration Guide
Pin configuration for ADM208AN (24-pin pdip package). Pin numbering, functions, and connection diagrams are defined in the manufacturer datasheet. Refer to it for the exact footprint and soldering guidelines.
No detailed pinout data available for ADM208AN.
Refer to the datasheet for full pin configuration.
Typical Applications
ADM208AN is suitable for 6 applications: Legacy UART Serial Port, Industrial Control Console, Data Acquisition Instrument, Service and Diagnostics Interface, Embedded Communication Bridge, Legacy Peripheral Upgrade.
Legacy UART Serial Port
The ADM208AN fits a legacy UART-to-RS-232 interface in a +5 V equipment chassis. Its four drivers and four receivers provide multiple channels without requiring external ±12 V supplies, while the verified 120 kbit/s rate suits conventional serial control and data links. Place the transceiver between the host UART and an RS-232 connector, follow the manufacturer’s 0.1 µF charge-pump capacitor requirement, and provide local +5 V bypassing. The 24-pin PDIP package supports through-hole assembly and repair-friendly industrial boards, but the complete pinout, protection requirements, and temperature limits must be confirmed from the datasheet.
Recommended
Industrial Control Console
The ADM208AN can connect a controller, service terminal, or diagnostic computer to industrial equipment using RS-232. The +5 V supply requirement is useful where a ±12 V rail is absent, and the four-channel architecture can reduce the number of separate interface devices when multiple ports are needed. Its 120 kbit/s capability is appropriate for configuration, status, and supervisory communications rather than high-bandwidth data. Designers should provide a stable reference ground, route the cable away from noisy power stages, and use connector protection appropriate to the installation; those system protections are not specified in the supplied excerpts.
Recommended
Data Acquisition Instrument
The ADM208AN is suitable for a data-acquisition instrument that needs a simple host-control link over RS-232. Its four drivers and receivers allow the instrument to expose control commands and status signals while operating from a +5 V logic supply. The 120 kbit/s rate is sufficient for short configuration exchanges and low-rate measurement data, but the system must account for UART framing, cable length, grounding, and any required receiver tolerance. Use the verified 0.1 µF charge-pump capacitor and follow the manufacturer layout guidance for bypassing and signal routing.
Recommended
Service and Diagnostics Interface
The ADM208AN can serve as a service interface in a controller or embedded test system where technicians connect a laptop or terminal through an RS-232 cable. The single +5 V supply simplifies service-board power compared with a discrete ±12 V driver arrangement, and the 24-pin PDIP package is convenient for through-hole prototypes and legacy equipment. The verified 120 kbit/s rate supports configuration logs and diagnostic commands. Production designs should verify ESD protection, operating temperature, and exact receiver thresholds because those values are not supplied and must not be inferred.
Recommended
Embedded Communication Bridge
The ADM208AN can be used in a small communication bridge that translates a +5 V microcontroller UART into an RS-232 endpoint. The four-channel arrangement offers flexibility for multiple point-to-point ports, although each channel still requires correct driver-to-receiver routing. The 120 kbit/s specification is suitable for supervisory, configuration, and legacy peripheral links. The design must observe RS-232 single-ended signaling, provide a suitable ground reference, and separate noisy return currents from the transceiver. Verify all pin assignments and capacitor values against the official ADM208 datasheet before fabrication.
Recommended
Legacy Peripheral Upgrade
The ADM208AN is a practical choice when modernizing a legacy peripheral that retains a through-hole RS-232 connector but lacks a convenient ±12 V supply. The CMOS implementation, four drivers, four receivers, and 120 kbit/s operation consolidate an RS-232 interface into one +5 V device. The PDIP package supports repair and production assembly using conventional through-hole processes. Because the supplied evidence does not confirm ESD ratings, temperature limits, or RoHS status, those requirements must be resolved against the exact manufacturer documentation and procurement specification before release.
Recommended
Recommended Products Summary
Engineering reference data for ADM208AN — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADM208ANZ | MAX211IDB | MAX211CWI+ | MAX211CDB | MAX211CAI+ |
|---|---|---|---|---|---|---|
| Package | 24-pin PDIP | 24-pin PDIP, exact suffix compatibility requires verification | 24-pin PDIP candidate | 24-pin PDIP candidate | 24-pin PDIP candidate | 24-pin PDIP candidate |
| Brand | Analog Devices | Analog Devices | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Interface Function | 4/4 RS-232 transceiver | ADM2xx RS-232 family; details require verification | RS-232 interface transceiver candidate | RS-232 interface transceiver candidate | RS-232 interface transceiver candidate | RS-232 interface transceiver candidate |
Key Differentiators
- Single +5 V RS-232 interface without external ±12 V rails (vs MAX211IDB)
- Four-driver and four-receiver channel count (vs MAX211CWI+)
- 9 V output swing from a +5 V supply (vs MAX211CDB)
Design Notes
Use a stable +5 V supply and place local bypass capacitance close to the ADM208AN supply pins. The verified family information identifies 0.1 µF charge-pump capacitors, so use the exact capacitor network and placement from the Analog Devices datasheet rather than estimating values from the family description. Confirm capacitor voltage rating, polarity, tolerance, and startup behavior against the final schematic before layout release.
Keep the charge-pump capacitors and supply bypass paths short, and route RS-232 driver and receiver traces away from switching nodes and high-current return paths. RS-232 is single-ended signaling, so ground reference quality matters as much as the data trace. Use a defined ground reference between connected equipment and test connector shield or signal ground according to the system’s EMC and grounding strategy.
Do not substitute a related MAX211 or ADM208 ordering suffix solely because the package appears similar. Verify every pin, supply requirement, driver/receiver enable state, charge-pump capacitor value, and receiver threshold against the exact manufacturer datasheet. The supplied sources do not establish a complete pinout, temperature range, ESD rating, or compliance declaration, so those items require engineering confirmation.
Compliance Information
The supplied excerpts do not establish RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. Obtain the current compliance declaration from Analog Devices for the exact ordering code.