Part A
ADM202EANZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4697 PCS
- Package
- DIP-16
- Series
- Interface - Drivers, Receivers, Transceivers
Replacement verdict
Compatible functional replacement candidate
The ADM202EANZ and ADM208AN are both dual-channel RS-232 transceivers in a 16-pin narrow SOIC package with matched supply voltage and temperature ranges, making them functionally interchangeable for most designs. The primary distinction is the on-chip charge pump configuration, which requires validation against the target board's external capacitor network before substitution.
Interface Protocol
High match
Package Type
High match
Supply Voltage Range
High match
Charge Pump 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 | ADM202EANZ | ADM208AN | Why it matters |
|---|---|---|---|
| Number of Drivers/Receivers | 2/2 | 4/4 | Determines how many RS-232 communication channels are available; the ADM208AN supports twice as many transceivers, which affects whether it can serve multi-line interfaces. |
| Data Rate | 230 kbps | 120 kbps | Maximum guaranteed throughput; the ADM202EANZ supports higher-speed serial links than the ADM208AN. |
| ESD Protection (IEC 1000-4-2) | ±15 kV (air/contact) | ±15 kV (air), ±8 kV (contact) | Higher ESD immunity improves robustness in harsh environments; the ADM202EANZ offers stronger contact-discharge protection. |
| Supply Voltage | 5 V | 5 V | Operating supply rail; both devices operate from a single 5 V supply, so power architecture is compatible. |
| Package / Mounting | 16-Lead PDIP (Through-Hole) | 24-Lead PDIP (Through-Hole) | Footprint and pin count differ; the ADM208AN requires a wider 24-pin socket, so they are not drop-in replacements on the same PCB. |
| Number of Pins | 16 | 24 | Pin count affects board layout and socket compatibility; substitution requires layout changes. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Industrial temperature range; both are rated for the same range, so environmental compatibility is equivalent. |
| Charge Pump / External Capacitors | Requires 4 external 0.1 µF capacitors | Requires 4 external 0.1 µF capacitors | On-chip charge pump with external caps generates RS-232 voltage levels; identical capacitor requirements simplify design reuse. |
| Manufacturer | Analog Devices | Analog Devices | Same manufacturer ensures consistent quality, documentation, and support for both parts. |
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 | ADM202EANZ | ADM208AN |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Type | Transceiver | Transceiver |
| Protocol | RS232 | RS232 |
| Number of Drivers/Receivers | 2/2 | 4/4 |
| 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 | Through Hole | Through Hole |
Frequently asked questions
What are the key differences between the ADM202EANZ and ADM208AN?
The ADM202EANZ is a 2-driver/2-receiver RS-232 transceiver with internal charge pump capacitors and enhanced ESD protection (up to ±15 kV on RS-232 pins), housed in a 16-lead PDIP. The ADM208AN is a 4-driver/4-receiver RS-232 transceiver requiring external charge pump capacitors, also in a 16-lead PDIP. The ADM202EANZ integrates the charge pump capacitors internally, reducing external component count, while the ADM208AN provides more driver/receiver channels but needs external capacitors.
Are the ADM202EANZ and ADM208AN pin-compatible?
No. Although both are 16-lead PDIP devices, their pinouts differ because the ADM202EANZ is a 2-driver/2-receiver device with internal capacitors, while the ADM208AN is a 4-driver/4-receiver device requiring external charge pump capacitors. Pin functions and external component connections are not interchangeable, so they cannot be dropped into the same PCB footprint without redesign.
What ESD protection does the ADM202EANZ offer compared to the ADM208AN?
The ADM202EANZ features enhanced ESD protection of up to ±15 kV on its RS-232 input/output pins (per the Analog Devices datasheet, using the human body model and IEC 1000-4-2 air discharge). The ADM208AN datasheet specifies ESD protection on RS-232 pins but does not claim the same ±15 kV enhanced rating; designers should consult the ADM208AN datasheet for its specified ESD levels before relying on comparable protection.
Do both devices operate from a single +5 V supply?
Yes. Both the ADM202EANZ and ADM208AN are designed to operate from a single +5 V supply and generate the required RS-232 voltage levels via on-chip charge pump circuitry (internal capacitors for the ADM202EANZ, external capacitors for the ADM208AN).
How many drivers and receivers does each device provide?
The ADM202EANZ provides 2 drivers and 2 receivers. The ADM208AN provides 4 drivers and 4 receivers. The ADM208AN is therefore suited to applications requiring more RS-232 channels, while the ADM202EANZ fits designs needing only two channels with a reduced external component count.
What data rate do the ADM202EANZ and ADM208AN support?
Both devices are specified by Analog Devices for RS-232 data rates up to 120 kbps, which is sufficient for standard RS-232 communication. Designers should confirm the exact rated data rate in the respective datasheet revision for their operating conditions.
Can the ADM202EANZ directly replace the ADM208AN in an existing design?
No. The ADM202EANZ has fewer drivers and receivers (2/2 versus 4/4), a different pinout, and internal versus external charge pump capacitors. A direct replacement would require PCB redesign and verification that two channels are sufficient for the application. Conversely, the ADM208AN cannot directly replace the ADM202EANZ without accommodating external capacitors and the different pinout.
What package type do the ADM202EANZ and ADM208AN use?
Both the ADM202EANZ and ADM208AN are offered in a 16-lead PDIP (plastic dual in-line package), denoted by the "N" suffix in the part numbers. This through-hole package is suitable for prototyping and legacy designs, though surface-mount variants exist in the broader ADM202E and ADM208 families.