Part A
ADM232AARWZ
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 2354 PCS
- Package
- SOIC-16
- Series
- Interfaces - pilotes, récepteurs, émetteurs - récepteurs
Replacement verdict
Compatible functional replacement candidate
The ADM231LAR is a functionally compatible replacement candidate for the ADM232AARWZ in many RS-232 interface applications, but it is not a pin-for-pin drop-in substitute. Designers must validate the differing package footprint, reduced driver channel count, and lower data rate before committing to a replacement in existing layouts.
Package Type
Validation required
Driver Channel Count
Not compatible
Data Rate
Validation required
Supply Voltage
High match
Parts at a glance
Part B
ADM231LAR
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 7923 PCS
- Package
- SOIC-16
- Series
- Interfaces - pilotes, récepteurs, émetteurs - récepteurs
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | ADM232AARWZ | ADM231LAR | Why it matters |
|---|---|---|---|
| Number of Drivers/Receivers | 2/2 | 2/2 | Both are dual transceivers, so the channel count is functionally equivalent for RS-232 interfacing. |
| Data Rate | 200 kbps | 120 kbps | The maximum guaranteed data rate affects whether the part can support higher-speed serial links. |
| Supply Voltage | 5 V | 5 V | Both operate from a single 5 V supply, so power rail compatibility is maintained. |
| Number of Charge Pump Capacitors | 4 | 4 | External charge pump capacitor count affects board layout and BOM cost; both require the same number. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | Industrial temperature range compatibility ensures the parts can be used in the same environments. |
| Package / Mounting | 16-SOIC (Surface Mount) | 16-SOIC (Surface Mount) | Matching package and mounting type allows drop-in replacement on the same PCB footprint. |
| Receiver Input Impedance | 5 kΩ | 5 kΩ | Standard RS-232 receiver input impedance ensures interoperability with standard RS-232 drivers. |
| ESD Protection (RS-232 Pins) | ±15 kV (IEC 1000-4-2) | ±15 kV (IEC 1000-4-2) | ESD robustness on the interface pins affects reliability in harsh environments and field serviceability. |
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 | ADM232AARWZ | ADM231LAR |
|---|---|---|
| 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 | Surface Mount | Surface Mount |
| Duplex | Full | - |
| Receiver Hysteresis | 400 mV | - |
| Data Rate | 200kbps | - |
| Operating Temperature | -40°C ~ 85°C | - |
Frequently asked questions
What are the key differences between the ADM232AARWZ and the ADM231LAR?
The ADM232AARWZ is a dual RS-232 line driver/receiver in a 16-lead SOIC_W package, while the ADM231LAR is a dual RS-232 line driver/receiver in a 16-lead SOIC_N package. The ADM232AARWZ operates from a single +5 V supply and supports data rates up to 200 kbps, whereas the ADM231LAR operates from a single +5 V supply with a lower data rate capability. The ADM232AARWZ is specified over the industrial temperature range, while the ADM231LAR is specified over the commercial temperature range.
Are the ADM232AARWZ and ADM231LAR pin-compatible?
Both devices are offered in 16-lead SOIC packages with the same pinout for the driver and receiver functions, but the ADM232AARWZ uses the SOIC_W (wide body) package and the ADM231LAR uses the SOIC_N (narrow body) package. The pin functions are equivalent, but the package body width differs, so PCB land patterns must be verified before substitution.
What data rate does the ADM232AARWZ support?
The ADM232AARWZ supports data rates up to 200 kbps, which is sufficient for standard RS-232 communication. This is a verified parameter from the Analog Devices datasheet for the ADM232A family.
What is the operating temperature range of the ADM232AARWZ?
The ADM232AARWZ is specified over the industrial temperature range of -40°C to +85°C, as stated in the Analog Devices datasheet. The ADM231LAR is specified over the commercial temperature range of 0°C to +70°C.
How many drivers and receivers do these devices integrate?
Both the ADM232AARWZ and the ADM231LAR integrate two RS-232 drivers and two RS-232 receivers, making them dual-channel line driver/receiver devices suitable for serial port applications.
What supply voltage do the ADM232AARWZ and ADM231LAR require?
Both devices operate from a single +5 V supply. The ADM232AARWZ includes on-chip charge pump circuitry to generate the required RS-232 voltage levels from the +5 V supply, and the ADM231LAR similarly operates from a single +5 V supply.
Can the ADM231LAR be used as a drop-in replacement for the ADM232AARWZ?
Not directly. Although both are dual RS-232 driver/receiver devices with the same pin functions, the ADM232AARWZ is in a wide-body SOIC_W package and the ADM231LAR is in a narrow-body SOIC_N package. The package footprint differs, and the temperature grade and data rate specifications also differ, so the replacement must be validated against the target design requirements and manufacturer documentation.