Part A
ADM202EANZ
ADI公司
- Lifecycle
- Active
- Stock
- 4697 件
- Package
- DIP-16
- Series
- 介面-驅動器、接收器、收發器
Replacement verdict
Compatible functional replacement candidate
The ADM202EANZ and ADM203JN are both dual RS-232 line drivers/receivers from Analog Devices in a 16-pin narrow SOIC package, sharing the same core interface function and pinout family. However, they differ in external charge-pump capacitor requirements and operating temperature range, so the ADM203JN can serve as a functional substitute for the ADM202EANZ only after validating the capacitor configuration and thermal margin for the target application.
Interface Function
High match
Package Type
High match
External Capacitor Configuration
Validation required
Operating Temperature Range
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 | ADM203JN | Why it matters |
|---|---|---|---|
| Number of Drivers | 2 | 1 | The number of RS-232 drivers determines how many transmit lines the interface can support; a mismatch affects the number of serial channels available. |
| Number of Receivers | 2 | 1 | The receiver count defines how many receive lines are available; differing counts change the usable serial port configuration. |
| Data Rate | 120 kbps | 120 kbps | Maximum data rate indicates the fastest supported signaling speed; both parts match here, so throughput is not a differentiator. |
| Supply Voltage | 5 V | 5 V | The operating supply voltage must match the host system rail; both devices operate from a single 5 V supply. |
| Package / Mounting | 16-Lead SOIC (surface mount) | 16-Lead PDIP (through-hole) | Package and mounting style affect PCB footprint and assembly process; a SOIC cannot directly replace a PDIP without layout changes. |
| Operating Temperature Range | -40 °C to +85 °C | 0 °C to +70 °C | The temperature range determines suitability for industrial versus commercial environments; the wider range part is more robust in harsh conditions. |
| ESD Protection (RS-232 Pins) | ±15 kV (IEC 1000-4-2) | Standard ESD protection | Enhanced ESD protection improves reliability in exposed interface applications; the ESD-rated part offers greater robustness against transients. |
| Charge Pump / External Capacitors | Internal charge pump, 4 external capacitors | Internal charge pump, 4 external capacitors | The charge pump generates RS-232 voltage levels internally; both require similar external capacitor networks, so the external BOM is comparable. |
| Manufacturer | Analog Devices | Analog Devices | Same manufacturer ensures consistent quality and documentation; both parts share the same design heritage. |
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 | ADM203JN |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Type | Transceiver | Transceiver |
| Protocol | RS232 | RS232 |
| Number of Drivers/Receivers | 2/2 | 2/2 |
| Voltage - Supply | 4.5V ~ 5.5V | 4.5V ~ 5.5V |
| Mounting Type | Through Hole | Through Hole |
| Duplex | Full | - |
| Receiver Hysteresis | 650 mV | - |
| Data Rate | 230kbps | - |
| Operating Temperature | -40°C ~ 85°C | - |
Frequently asked questions
What are the key differences between the ADM202EANZ and ADM203JN?
The ADM202EANZ is a dual RS-232 line driver/receiver with an internal charge pump that generates RS-232 voltage levels from a single 5 V supply, specified over the industrial temperature range and housed in a 16-lead PDIP. The ADM203JN is a single RS-232 line driver/receiver that requires an external ±12 V supply for RS-232 levels, specified over the commercial temperature range and housed in a 16-lead PDIP. The primary differences are the number of drivers/receivers, the charge-pump requirement, and the temperature grade.
Are the ADM202EANZ and ADM203JN pin-compatible?
No. Both devices use a 16-lead PDIP, but their pin functions differ because the ADM202EANZ integrates a charge pump and provides two drivers and two receivers, while the ADM203JN provides one driver and one receiver and requires external positive and negative supplies. The pinouts are not interchangeable, so the PCB layout must be designed for the specific device.
Can the ADM203JN be used as a direct replacement for the ADM202EANZ?
No. The ADM203JN requires external ±12 V supplies and provides only one driver and one receiver, whereas the ADM202EANZ operates from a single 5 V supply using an internal charge pump and provides two drivers and two receivers. A direct substitution is not possible without redesigning the power supply and verifying the reduced channel count against the application requirements.
What supply voltage does each device require?
The ADM202EANZ operates from a single +5 V supply and generates the RS-232 output levels internally via its on-chip charge pump. The ADM203JN requires a +5 V logic supply plus external +12 V and -12 V supplies to produce RS-232 output levels.
How many drivers and receivers does each device provide?
The ADM202EANZ provides two RS-232 drivers and two RS-232 receivers. The ADM203JN provides one RS-232 driver and one RS-232 receiver.
What are the operating temperature ranges for the ADM202EANZ and ADM203JN?
The ADM202EANZ is specified over the industrial temperature range of -40 °C to +85 °C. The ADM203JN is specified over the commercial temperature range of 0 °C to +70 °C. The temperature grade should be selected according to the target application environment.
Do both devices support the same RS-232 data rate?
Both devices are specified for RS-232 data rates up to 120 kbps, which is sufficient for standard RS-232 communication. The achievable data rate in a given design should be confirmed against the manufacturer datasheet and the external capacitor selection for the ADM202EANZ charge pump.
What package type do the ADM202EANZ and ADM203JN use?
Both devices are offered in a 16-lead PDIP (N) package. The ADM202EANZ suffix "ANZ" indicates the 16-lead PDIP package in lead-free (Pb-free) construction, while the ADM203JN suffix "JN" indicates the 16-lead PDIP package in the commercial temperature grade. Package and lead-finish details should be verified against the manufacturer datasheet for the specific orderable part number.