Part A
ADM202JRN
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5083 PCS
- Package
- SOIC-16
- Series
- Interface - Condutores, Receptores, Transceivers
Replacement verdict
Compatible functional replacement candidate
The ADM202EARW is a functionally compatible replacement candidate for the ADM202JRN, sharing the same dual RS-232 driver/receiver function, 16-pin SOIC package, and 5 V supply architecture, while offering enhanced ESD protection. Designers should validate ESD robustness requirements and confirm exact timing margins against the target application before final qualification.
Function and Interface Type
High match
Package and Pinout
High match
Supply Voltage
High match
ESD Protection Level
Validation required
Parts at a glance
Part B
ADM202EARW
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5447 PCS
- Package
- SOIC-16
- Series
- Interface - Condutores, Receptores, Transceivers
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | ADM202JRN | ADM202EARW | Why it matters |
|---|---|---|---|
| Number of Drivers/Receivers | 2/2 | 2/2 | Both are dual RS-232 transceivers, so the channel count is functionally equivalent for serial interface designs. |
| Package / Mounting Type | 16-SOIC (surface mount) | 16-SOIC Wide Body (surface mount) | The wide-body SOIC of the EARW variant occupies a different footprint than the narrow SOIC of the JRN, affecting PCB layout and drop-in compatibility. |
| Operating Temperature Range | 0°C to +70°C (commercial) | -40°C to +85°C (industrial) | The extended industrial range of the EARW allows use in harsher environments where the commercial-grade JRN may not be specified. |
| ESD Protection (RS-232 Pins) | Standard ESD protection | ±15 kV ESD protection (IEC 1000-4-2) | The enhanced ESD rating of the EARW improves robustness against electrostatic discharge on the interface pins, a key reliability differentiator. |
| Data Rate | Up to 120 kbps | Up to 120 kbps | Both support the same maximum data rate, so throughput is not a differentiator for substitutability. |
| Supply Voltage | 5 V single supply | 5 V single supply | Identical supply requirements mean both can operate from the same 5 V rail in a given design. |
| On-Chip Charge Pump | Yes (internal) | Yes (internal) | Both integrate the charge pump needed to generate RS-232 voltage levels, eliminating external supply rails. |
| Number of External Capacitors | 4 (0.1 µF typical) | 4 (0.1 µF typical) | Matching external capacitor count simplifies reuse of the same surrounding passive network when substituting parts. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADM202JRN | ADM202EARW |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Obsolete | Obsolete |
| Type | Transceiver | Transceiver |
| Protocol | RS232 | RS232 |
| Number of Drivers/Receivers | 2/2 | 2/2 |
| Duplex | Full | Full |
| Receiver Hysteresis | 400 mV | 650 mV |
| Data Rate | - | 230kbps |
| Voltage - Supply | 4.5V ~ 5.5V | 4.5V ~ 5.5V |
| Operating Temperature | 0°C ~ 70°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the key differences between the ADM202JRN and ADM202EARW?
The ADM202JRN is a dual RS-232 line driver/receiver in a 16-lead SOIC package rated for 0°C to +70°C, while the ADM202EARW is an enhanced ESD-protected version in a 16-lead SOIC_W package rated for −40°C to +85°C. The ADM202EARW includes ±15 kV ESD protection on the RS-232 I/O pins, whereas the ADM202JRN provides standard ESD tolerance without the enhanced protection rating.
Are the ADM202JRN and ADM202EARW pin-compatible?
Both devices are offered in 16-lead SOIC packages with the same pinout (VCC, V+, V−, GND, T1IN, T2IN, R1OUT, R2OUT, T1OUT, T2OUT, R1IN, R2IN, and charge pump capacitor pins). However, the ADM202EARW uses the wider SOIC_W body, so PCB land patterns must be verified against the respective datasheet dimensions before substitution.
Do both parts support the same data rate and RS-232 interface?
Yes. Both the ADM202JRN and ADM202EARW are dual-channel RS-232 drivers/receivers compliant with EIA/TIA-232-E and V.28 specifications, and both support data rates up to 120 kbps. They each integrate an on-chip dual charge pump requiring only four external 0.1 µF capacitors.
What is the difference in ESD protection between the two devices?
The ADM202EARW features enhanced ESD protection of ±15 kV on the RS-232 input/output pins (per the datasheet's human body model and IEC 1000-4-2 specifications), making it suitable for applications exposed to higher electrostatic discharge. The ADM202JRN does not carry the enhanced ±15 kV ESD rating and should be used where standard handling ESD precautions are sufficient.
What are the operating temperature ranges for each part?
The ADM202JRN is specified for commercial temperature operation from 0°C to +70°C. The ADM202EARW is specified for industrial temperature operation from −40°C to +85°C, making it the appropriate choice for industrial and extended-temperature environments.
Can the ADM202EARW be used as a drop-in replacement for the ADM202JRN?
Functionally the devices are equivalent dual RS-232 transceivers, but a drop-in replacement requires verifying the wider SOIC_W package footprint, the extended −40°C to +85°C temperature rating, and the enhanced ESD specification against the target design. The ADM202EARW is generally a superset in ruggedness, but PCB land pattern and thermal considerations must be confirmed from the manufacturer datasheet.
What supply voltage and current do the ADM202JRN and ADM202EARW require?
Both devices operate from a single +5 V ±10% supply. Typical supply current is in the low single-digit milliampere range (approximately 3 mA to 6 mA typical, per the datasheet), with the on-chip charge pump generating the required ±RS-232 output levels from the single +5 V rail.
Which part should be selected for an industrial application?
For industrial applications, the ADM202EARW is the appropriate selection because it is rated for −40°C to +85°C operation and includes ±15 kV ESD protection on the RS-232 I/O pins. The ADM202JRN, rated 0°C to +70°C without the enhanced ESD rating, is better suited to commercial-temperature environments.