Part A
ADM202EARN
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 7559 PCS
- Package
- SOIC-16
- Series
- Interface - Condutores, Receptores, Transceivers
Replacement verdict
Compatible functional replacement candidate
The ADM207EAR-REEL is a functional replacement candidate for the ADM202EARN, sharing the same RS-232 transceiver function, dual driver/receiver channel count, and SOIC-16 package footprint, with the primary distinction being the on-chip charge pump configuration and external capacitor requirements. Designers should validate the charge pump capacitor network and confirm the exact supply voltage tolerance before substituting in existing layouts.
Function and Interface Type
High match
Channel Count
High match
Package Type
High match
Charge Pump Configuration
Validation required
Parts at a glance
Part B
ADM207EAR-REEL
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4458 PCS
- Package
- SOIC-24
- 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 | ADM202EARN | ADM207EAR-REEL | Why it matters |
|---|---|---|---|
| Number of Drivers | 2 | 5 | Determines how many RS-232 transmit lines the device can drive; a 5-driver part supports more serial channels than a 2-driver part. |
| Number of Receivers | 2 | 3 | Determines how many RS-232 receive lines the device can accept; affects the number of bidirectional serial interfaces supported. |
| Package / Pin Count | 16-lead SOIC (narrow) | 24-lead SOIC (wide) | Footprint and pin count must match the PCB layout; these parts are not drop-in compatible due to different package sizes. |
| Supply Voltage | 5 V single supply | 5 V single supply | Both operate from a single 5 V rail, so system power architecture is compatible between the two parts. |
| Data Rate | Up to 120 kbps | Up to 120 kbps | Maximum serial throughput; both support standard RS-232 data rates, so speed is not a differentiator. |
| On-Chip Charge Pump | Yes (internal) | Yes (internal) | Internal charge pumps generate the RS-232 voltage levels from a single 5 V supply, eliminating external bipolar supplies. |
| External Capacitors Required | 4 x 0.1 µF | 4 x 0.1 µF | Number and value of external charge-pump capacitors affect board space and BOM cost; both require the same count. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Industrial temperature range suitability; identical ranges mean both fit the same environmental conditions. |
| ESD Protection (RS-232 I/O) | ±15 kV (IEC 1000-4-2) | ±15 kV (IEC 1000-4-2) | Robustness against electrostatic discharge on the serial interface; both offer the same enhanced ESD rating. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADM202EARN | ADM207EAR-REEL |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Obsolete | Obsolete |
| Type | Transceiver | Transceiver |
| Protocol | RS232 | RS232 |
| Number of Drivers/Receivers | 2/2 | 5/3 |
| Duplex | Full | Full |
| Receiver Hysteresis | 650 mV | 650 mV |
| Data Rate | 230kbps | 230kbps |
| Voltage - Supply | 4.5V ~ 5.5V | 4.5V ~ 5.5V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the key differences between the ADM202EARN and ADM207EAR-REEL?
The ADM202EARN is a 2-driver, 2-receiver RS-232 transceiver in a 16-lead narrow SOIC package, while the ADM207EAR-REEL is a 5-driver, 3-receiver RS-232 transceiver in a 24-lead SOIC package supplied on tape and reel. The ADM207EAR-REEL provides more driver/receiver channels and additional features, whereas the ADM202EARN is a simpler 2T2R device.
Are the ADM202EARN and ADM207EAR-REEL pin-to-pin compatible?
No. The ADM202EARN uses a 16-lead narrow SOIC package, and the ADM207EAR-REEL uses a 24-lead SOIC package. They have different pin counts and pinouts, so they are not drop-in replacements for each other.
Do both devices operate from a single 5 V supply?
Yes. Both the ADM202EARN and ADM207EAR-REEL are specified for operation from a single +5 V supply, using on-chip charge pump circuitry to generate the RS-232 voltage levels.
What data rate do the ADM202EARN and ADM207EAR-REEL support?
Both devices are specified for RS-232 data rates up to 120 kbps, which is sufficient for standard RS-232 communication requirements.
How many RS-232 drivers and receivers does each device provide?
The ADM202EARN provides 2 drivers and 2 receivers. The ADM207EAR-REEL provides 5 drivers and 3 receivers, making it suitable for applications requiring more RS-232 channels.
What is the significance of the "E" suffix in both part numbers?
The "E" suffix indicates that both devices include enhanced ESD protection on the RS-232 I/O pins, meeting the IEC 1000-4-2 (EN 61000-4-2) specification for electrostatic discharge immunity.
What does the "-REEL" suffix indicate on the ADM207EAR-REEL?
The "-REEL" suffix indicates that the ADM207EAR-REEL is supplied in tape-and-reel packaging, which is intended for automated pick-and-place assembly in high-volume production. The ADM202EARN is supplied in standard tube or tray packaging.
Can the ADM202EARN be used as a substitute for the ADM207EAR-REEL in an existing design?
No, not directly. The ADM202EARN has fewer drivers and receivers (2T2R vs 5T3R) and a different package and pinout (16-lead vs 24-lead SOIC). A redesign of the PCB and verification of channel requirements would be necessary before substitution.