Part A
ADM232AARNZ
Компания Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 1649 ПКС
- Package
- SOIC-16
- Series
- Интерфейс - драйверы, приемники, передатчики
Replacement verdict
Compatible functional replacement candidate
The ADM232AARNZ and ADM231LAR are both dual-channel RS-232 transceivers in a 16-pin SOIC package, making them functionally comparable for many serial interface designs. However, they differ in charge pump configuration, external capacitor requirements, and supply voltage range, so the ADM231LAR should be validated against the target board's decoupling and power design before being adopted as a direct substitute for the ADM232AARNZ.
Channel Count
High match
Package Type
High match
Charge Pump Capacitors
Validation required
Supply Voltage 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 | ADM232AARNZ | ADM231LAR | Why it matters |
|---|---|---|---|
| Number of Drivers | 2 | 2 | Both provide two RS-232 drivers, so the transmit-side channel count is equivalent for substitutability. |
| Number of Receivers | 2 | 2 | Both provide two RS-232 receivers, matching the receive-side channel count needed for drop-in replacement. |
| Supply Voltage (Vcc) | 5 V | 5 V | Both operate from a single 5 V supply, so the power rail requirement is compatible. |
| Data Rate | 200 kbps | 120 kbps | The ADM232A supports a higher maximum data rate, which may matter if the application requires faster serial communication. |
| External Capacitors Required | 4 (charge pump) | 4 (charge pump) | Both require external charge-pump capacitors, so the board layout and BOM impact are similar. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Identical industrial temperature ranges ensure both parts suit the same environmental conditions. |
| Package | 16-lead SOIC (N) | 16-lead SOIC (R) | Both are 16-lead SOIC packages, so the footprint is compatible for board-level substitution. |
| Mounting Type | Surface Mount | Surface Mount | Both are surface-mount devices, matching assembly process requirements. |
| RoHS Compliance | RoHS Compliant | RoHS Compliant | Both meet RoHS requirements, ensuring regulatory and environmental compliance for the 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 | ADM232AARNZ | 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 primary differences between the ADM232AARNZ and the ADM231LAR?
The ADM232AARNZ is a dual RS-232 line driver/receiver in a 16-lead SOIC package (N narrow body) specified for 5 V operation, while the ADM231LAR is a lower-power RS-232 transceiver in a 14-lead SOIC package. The ADM232A integrates two drivers and two receivers with on-chip charge pump capacitors, whereas the ADM231L is a single-driver/single-receiver device with a lower quiescent current profile. Package pin count and pinout differ, so they are not drop-in replacements.
Are the ADM232AARNZ and ADM231LAR pin-to-pin compatible?
No. The ADM232AARNZ uses a 16-lead SOIC (N) package, and the ADM231LAR uses a 14-lead SOIC package. The pin counts and pin assignments differ, so the two devices cannot be interchanged on the same PCB footprint without layout changes.
Do both devices operate from a single 5 V supply?
Yes. Both the ADM232AARNZ and the ADM231LAR are specified for single +5 V supply operation and use on-chip charge pump circuitry to generate the RS-232 voltage levels required for compliant driver outputs.
How do the driver and receiver counts compare between the two parts?
The ADM232AARNZ provides two RS-232 drivers and two RS-232 receivers. The ADM231LAR provides one RS-232 driver and one RS-232 receiver. Designs requiring two full duplex channels should use the ADM232AARNZ, while single-channel applications can use the ADM231LAR.
Which device is better suited for low-power portable designs?
The ADM231LAR is the lower-power option, as it is specified with lower supply current than the ADM232AARNZ. For battery-powered or current-constrained systems with a single RS-232 channel, the ADM231LAR is generally the more appropriate choice, provided the reduced driver/receiver count meets the interface requirement.
What data rate do the ADM232AARNZ and ADM231LAR support?
Both devices are specified for RS-232 data rates up to 120 kbps, which is sufficient for standard serial communication interfaces. Designs requiring higher throughput should consider other RS-232 transceivers with higher specified data rates.
Can the ADM231LAR directly replace the ADM232AARNZ in an existing design?
No. Because the ADM231LAR has a different package (14-lead SOIC versus 16-lead SOIC), a different pinout, and only one driver/receiver pair versus two, it cannot directly replace the ADM232AARNZ. A redesign of the PCB footprint and interface circuitry would be required, and the reduced channel count must be validated against the system requirements.
Are both devices compliant with RS-232 interface standards?
Yes. Both the ADM232AARNZ and the ADM231LAR are RS-232 transceivers designed to meet the electrical requirements of the RS-232 standard, including the driver output voltage levels and receiver input thresholds, when operated from a +5 V supply with the specified external components.