Part A
ADM202EARN
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 7559 個数
- Package
- SOIC-16
- Series
- インターフェース - ドライバ、レシーバ、トランシーバ
Replacement verdict
Compatible functional replacement candidate
The ADM202EARN and ADM207ARZ are both dual-channel RS-232 transceivers from Analog Devices with integrated charge pumps, making them functionally comparable for serial interface designs. However, they differ in package footprint and external capacitor configuration, so the ADM207ARZ can serve as a functional substitute only after the PCB layout and charge-pump capacitor network are validated against the target design.
Interface Protocol
High match
Channel Count
High match
Package Type
Validation required
External Capacitor Configuration
Validation required
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 | ADM207ARZ | 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 | Sets the number of RS-232 receive channels available; affects how many incoming serial signals can be monitored. |
| Package / Mounting | 16-Lead SOIC (Narrow), Surface Mount | 24-Lead SOIC (Wide), Surface Mount | Footprint and pin count must match the PCB layout; the two parts are not drop-in compatible due to different package sizes. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | Confirms both parts are rated for industrial temperature environments, though package differences still prevent direct substitution. |
| Supply Voltage | 5 V (single supply) | 5 V (single supply) | Both operate from a single 5 V rail, so power supply design is compatible between the two devices. |
| Data Rate | Up to 120 kbps | Up to 120 kbps | Maximum serial throughput is the same, so neither part offers a speed advantage for the interface. |
| On-Chip Charge Pump | Yes (internal) | Yes (internal) | Both generate RS-232 voltage levels internally from a single 5 V supply, eliminating the need for external bipolar supplies. |
| ESD Protection (RS-232 Pins) | ±15 kV (IEC 1000-4-2, Air/Ground) | ±15 kV (IEC 1000-4-2, Air/Ground) | Both offer robust ESD protection on the RS-232 interface pins, important for reliable field operation. |
| Number of External Capacitors | 4 (0.1 µF) | 4 (0.1 µF) | Both require the same small external charge-pump capacitors, simplifying the surrounding circuit design. |
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 | ADM207ARZ |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC,Analog Devices Inc. |
| Part Status | Obsolete | Active |
| 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 | 120Kbps |
| 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 ADM207ARZ?
The ADM202EARN is a 2-driver/2-receiver RS-232 transceiver in a 16-lead narrow SOIC package, while the ADM207ARZ is a 5-driver/3-receiver RS-232 transceiver in a 24-lead SOIC package. The ADM207ARZ provides more driver/receiver channels and additional features, whereas the ADM202EARN is a simpler 2T/2R solution.
Are the ADM202EARN and ADM207ARZ pin-to-pin compatible?
No. The ADM202EARN uses a 16-lead narrow SOIC package, and the ADM207ARZ uses a 24-lead SOIC package. They have different pin counts and pinouts, so they are not directly interchangeable on the same PCB footprint.
Do both devices operate from a single 5 V supply?
Yes. Both the ADM202EARN and ADM207ARZ are specified for operation from a single +5 V supply and include on-chip charge pump circuitry to generate the RS-232 voltage levels.
What data rate do the ADM202EARN and ADM207ARZ 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 drivers and receivers does each device provide?
The ADM202EARN provides 2 drivers and 2 receivers. The ADM207ARZ provides 5 drivers and 3 receivers, making it suitable for applications requiring more RS-232 channels.
Do these devices include ESD protection?
Yes. Both the ADM202EARN and ADM207ARZ are members of the ADM2xxE family, which includes enhanced ESD protection on the RS-232 I/O pins, making them suitable for robust interface applications.
What is the operating temperature range for these devices?
Both the ADM202EARN and ADM207ARZ are specified for the industrial temperature range of -40°C to +85°C, as indicated by the "A" grade suffix in their part numbers.
Can the ADM207ARZ be used as a drop-in replacement for the ADM202EARN?
No. Due to different package sizes (24-lead vs 16-lead SOIC), different pinouts, and different driver/receiver counts, the ADM207ARZ cannot be used as a drop-in replacement for the ADM202EARN. A PCB redesign would be required.