ADM203JN - 120 kB/s 5 V RS-232 Transceiver | Analog Devices
MPN: ADM203JN ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.525 | $4.53 |
| 10 | $4.525 | $45.25 |
| 100 | $4.525 | $452.50 |
| 500 | $4.525 | $2,262.50 |
| 1,000 | $4.525 | $4,525.00 |
ADM203JN Overview
An RS-232 transceiver is an interface IC that translates between single-ended CMOS logic levels and differential, bipolar RS-232 voltage levels. It belongs to the interface-IC hierarchy, where transceivers combine line drivers and receivers for serial data links. The ADM203JN is designed for equipment that needs bidirectional or multi-channel RS-232 connectivity while minimizing external charge-pump components.
Verified source data identifies key features as 120 kB/s transmission, a single 5 V power supply, compliance with EIA-232-E and V.28 specifications, two drivers, two receivers, onboard DC-DC converters, and no external capacitors for the ADM203 version. These characteristics make it suitable for industrial control, test equipment, point-of-sale terminals, and computer peripherals using RS-232 links.
The device's integrated charge-pump approach simplifies board layout compared with older RS-232 implementations that require external pump capacitors. Its high drive current is described in the verified material as supporting extended cable lengths, while the 120 kB/s rate supports faster serial data transfer than many conventional RS-232 designs.
Typical circuit use places the IC between a host UART and an external RS-232 connector. Logic-side inputs and outputs use CMOS-compatible levels, while driver outputs handle the higher RS-232 voltage swings generated by the internal converter. Board layout should keep connector and interface traces short where possible, provide adequate bypassing, and follow the manufacturer's datasheet for decoupling and signal routing.
This page combines verified ADM203JN specifications, sourcing information, interface-category guidance, and design notes. It also distinguishes confirmed facts from unavailable electrical details, avoiding unsupported claims about parameters that are not present in the supplied sources.
Drop-in alternatives for ADM203JN — 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 ADM203JN (same form factor and footprint) — differing in Package, Product Type, Data Rate, Mounting Type, Supply Voltage.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MAX211IDB
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View Datasheet →MAX232D
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View Datasheet →MAX211CWI+
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View Datasheet →MAX211CDB
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View Datasheet →ADM203JN Specifications
| Product Type | High-speed CMOS RS-232 driver/receiver |
| Supply Voltage | 5 V |
| Transmission Rate | 120 kB/s |
| Driver Count | 2 |
| Receiver Count | 2 |
| Interface Standard | EIA-232-E and V.28 |
| External Charge-Pump Capacitors | Not required for ADM203 |
| DC-DC Converter | Onboard |
| Nominal DC-DC Output | 9 V |
| Logic Supply Type | Single 5 V supply |
| Package | DIP-20 |
| Terminal Count | 20 |
| Mounting Type | Through-hole |
| Temperature Grade | Commercial |
| Cable Length Support | Extended cable lengths supported by high-drive-current outputs |
| Document Page Count | 6 pages |
| Datasheet File Size | 120 kB |
ADM203JN dip-20 Pin Configuration Guide
Pin configuration for ADM203JN (dip-20 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 ADM203JN.
Refer to the datasheet for full pin configuration.
Typical Applications
ADM203JN is suitable for 6 applications: Industrial Serial Control, Point-of-Sale Terminal Interface, Test and Measurement Equipment, Computer Peripheral Connectivity, Data Acquisition and Control, Embedded Service and Configuration Port.
Industrial Serial Control
The ADM203JN fits legacy industrial equipment that communicates through RS-232 control ports. Its 120 kB/s transmission rate, two drivers, and two receivers provide useful channel density for command, status, and data paths in a compact 20-pin DIP package. The device uses a single 5 V supply and its onboard converter produces approximately 9 V, reducing the number of external charge-pump capacitors required for the ADM203 version. In a controller, connect the logic-side signals to a UART and route the driver outputs to an RS-232 connector. Verify the full electrical ratings and pinout in the manufacturer datasheet before deployment, especially when cable length, grounding, or industrial temperature requirements are critical.
Recommended
Point-of-Sale Terminal Interface
The ADM203JN is appropriate for point-of-sale equipment and peripheral interfaces that rely on RS-232 links. The 120 kB/s rate supports serialized transactions while two drivers and two receivers can serve multiple handshake or status functions. Its single 5 V supply is convenient for systems already powered from 5 V logic, and the ADM203 version eliminates external charge-pump capacitors according to the verified feature summary. The IC should sit between the host UART and the connector, with short traces and a controlled return path. Because RS-232 voltage levels are higher and lower than CMOS logic levels, do not connect logic-side pins directly to the external connector without following the complete pinout and protection guidance.
Recommended
Test and Measurement Equipment
The ADM203JN can support RS-232 configuration and control ports on test and measurement instruments. Its two-channel driver/receiver arrangement can reduce the number of interface ICs needed when a product exposes more than one serial signal. The confirmed 120 kB/s rating is useful for command traffic and moderate data transfer, while the onboard approximately 9 V converter supports RS-232 output drive. A practical implementation places the transceiver near the rear-panel connector, uses a solid ground reference, and keeps the UART traces away from the high-voltage driver output region. The supplied data does not specify input thresholds, output levels, or temperature limits, so instrument designers should verify those values in the current Analog Devices documentation.
Recommended
Computer Peripheral Connectivity
The ADM203JN is suited to legacy computer peripherals that expose an RS-232 port for configuration, firmware transfer, or status reporting. The 5 V supply is compatible with many controller boards, and the 120 kB/s transmission rate provides more bandwidth than slow legacy serial links. Its two drivers and two receivers allow a peripheral to implement multiple serial functions without duplicating the transceiver. Place the IC between the host controller and the external port, and observe the verified ADM203 requirement for no external charge-pump capacitors. Board-level protection, connector shielding, and grounding should be evaluated separately because those details are not quantified in the supplied sources.
Recommended
Data Acquisition and Control
The ADM203JN can be used in data-acquisition equipment that needs legacy RS-232 command and response channels. The 120 kB/s rate is suitable for supervisory communications rather than high-throughput sensor streaming, while two drivers and two receivers provide flexibility for control commands, acknowledgments, and status flags. Its single 5 V operation simplifies power planning in mixed-signal systems, and the ADM203 version requires no external charge-pump capacitors. Place the transceiver near the connector and UART, maintain a low-impedance ground path, and separate logic routing from RS-232 driver outputs. Verify signal levels and timing against the exact datasheet before connecting to laboratory or field equipment.
Recommended
Embedded Service and Configuration Port
The ADM203JN is a practical choice for embedded systems that retain a service port for configuration, diagnostics, or firmware commands. The single 5 V supply aligns with many embedded logic rails, and the 120 kB/s rate can reduce service-transfer time compared with lower-speed serial interfaces. Two drivers and two receivers allow the service connector to support both command output and diagnostic input. The ADM203 family's no-external-charge-pump-capacitor feature helps conserve PCB area, although the 20-pin DIP footprint is more appropriate for through-hole or legacy-compatible layouts than new space-constrained boards. Confirm the UART logic levels, connector pinout, and cable grounding before field deployment.
Recommended
Recommended Products Summary
Engineering reference data for ADM203JN — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MAX211IDB | MAX202IN | MAX232D | MAX211CWI+ | MAX211CDB |
|---|---|---|---|---|---|---|
| Brand | Analog Devices | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Package | DIP-20 | DIP-20 | DIP-20 | DIP-20 | SOIC-20 | DIP-20 |
Key Differentiators
- High-speed 120 kB/s operation (vs MAX211IDB)
- No external charge-pump capacitors for the ADM203 version (vs MAX202IN)
- Two drivers and two receivers in a 20-pin DIP package (vs MAX232D)
Design Notes
Place the ADM203JN close to the RS-232 connector and UART interface. Keep logic-side traces short, route the ground return with low impedance, and separate high-swing RS-232 driver outputs from sensitive logic paths. The supplied sources do not provide exact PCB artwork or trace-length rules, so use the current Analog Devices datasheet and application guidance for final placement.
The verified ADM203 feature set identifies a single 5 V supply and onboard DC-DC conversion to approximately 9 V. Provide stable supply routing and the decoupling required by the manufacturer datasheet. Do not assume that the 9 V internal node is an externally usable supply rail; its purpose is RS-232 output-drive generation. Exact capacitor values and supply tolerances were not included in the supplied data.
Do not treat RS-232 connector pins and CMOS logic pins as interchangeable. Confirm the complete ADM203JN pinout before wiring because the supplied sources identify a 20-terminal DIP package but do not provide individual pin names. Also verify cable length, grounding, UART baud rate, and receiver thresholds against the target system. A nominal RS-232 transceiver match is not enough to establish drop-in compatibility.
The ADM203 variant is described as requiring no external charge-pump capacitors, unlike the ADM202 feature summary that includes 0.1 F charge-pump capacitors. Avoid adding or removing capacitors based on a different family member's design. Confirm the exact ADM203JN datasheet and schematic requirements before release, especially when adapting an existing board or importing a cross-reference part.
Compliance Information
The supplied data identifies EIA-232-E and V.28 interface compliance but does not provide verified RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declarations. AEC-Q100 is marked not_applicable because the part is a commercial RS-232 interface IC and no automotive qualification was supplied.
