Part A
ADM232AARWZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2354 Stückzahl
- Package
- SOIC-16
- Series
- Interface-Treiber, Empfänger, Transceiver
Replacement verdict
Compatible functional replacement candidate
The ADM231LJRZ can serve as a functional replacement candidate for the ADM232AARWZ in many RS-232 interface applications, as both are dual transceivers in a 16-pin SOIC package with comparable supply voltage and data-rate capabilities. However, the ADM231LJRZ operates from a 3.3 V nominal supply versus the 5 V supply of the ADM232AARWZ, and the two devices differ in their charge-pump capacitor configuration and external component requirements. Designers should validate supply compatibility, capacitor count, and logic-level thresholds in the target circuit before committing to the substitution.
Supply Voltage
Validation required
Package Type
High match
Channel Configuration
High match
External Capacitor Requirements
Validation required
Parts at a glance
Part B
ADM231LJRZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 9568 Stückzahl
- Package
- SOIC-16
- Series
- Interface-Treiber, Empfänger, Transceiver
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 | ADM231LJRZ | Why it matters |
|---|---|---|---|
| Number of Drivers/Receivers | 2/2 | 2/2 | Both are dual driver/receiver devices, so the channel count is functionally equivalent for RS-232 interfacing. |
| Data Rate | 200 kbps | 120 kbps | The maximum data rate affects throughput; the ADM232A supports a higher rate than the ADM231L. |
| Supply Voltage | 5 V | 3.3 V | Operating supply voltage must match the system rail; these parts are not directly interchangeable without level considerations. |
| Number of External Charge Pump Capacitors | 4 | 4 | External capacitor count affects board layout and BOM; both require the same number of charge pump capacitors. |
| Operating Temperature Range | -40°C to +85°C | 0°C to +70°C | The wider industrial temperature range of the ADM232A allows use in harsher environments than the commercial-grade ADM231L. |
| Package / Mounting | 16-Lead SOIC (Wide) | 16-Lead SOIC (Narrow) | Package footprint differences affect PCB layout and drop-in substitutability. |
| Receiver Input Threshold | Standard RS-232 (±3 V) | Standard RS-232 (±3 V) | Both comply with standard RS-232 receiver thresholds, ensuring interoperability with standard RS-232 drivers. |
| Typical Supply Current | ~8 mA | ~6 mA | Lower supply current in the ADM231L benefits power-sensitive designs, though both are relatively low-power. |
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 | ADM231LJRZ |
|---|---|---|
| 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 ADM231LJRZ?
The ADM232AARWZ is a dual RS-232 line driver/receiver in a 16-lead SOIC_W package, specified for 5 V operation, while the ADM231LJRZ is a lower-power RS-232 transceiver in a 16-lead SOIC_N package specified for 3.3 V operation. They differ in supply voltage, package body width, and power characteristics, so they are not drop-in equivalents.
Can the ADM232AARWZ and ADM231LJRZ be substituted for each other directly?
No. The ADM232AARWZ operates from a 5 V supply and the ADM231LJRZ operates from a 3.3 V supply, and their package body widths differ (SOIC_W versus SOIC_N). A direct substitution requires verifying supply voltage, logic levels, and PCB land pattern against the respective datasheets.
What supply voltage does each device require?
The ADM232AARWZ is specified for a single 5 V supply. The ADM231LJRZ is specified for a 3.3 V supply. Designs must match the supply rail to the device variant to avoid out-of-specification operation.
What package types do these two parts use?
Both are offered in 16-lead SOIC packages, but the ADM232AARWZ uses the SOIC_W (wide body) variant and the ADM231LJRZ uses the SOIC_N (narrow body) variant. The different body widths affect PCB footprint and clearance requirements.
How many drivers and receivers does each device integrate?
Both the ADM232AARWZ and ADM231LJRZ are dual RS-232 driver/receiver devices, each integrating two drivers and two receivers in a single 16-lead package.
Do these devices support hardware shutdown or enable control?
The ADM231LJRZ includes a shutdown/enable control feature for power management, whereas the ADM232AARWZ does not provide a shutdown pin. Designs requiring low-power standby should account for this difference.
Are external charge pump capacitors required for both parts?
Yes. Both the ADM232AARWZ and ADM231LJRZ use external charge pump capacitors to generate the RS-232 voltage levels. The required capacitor values and count should be taken from the respective manufacturer datasheets.
Which part is better suited for a 3.3 V low-power design?
The ADM231LJRZ is the appropriate choice for 3.3 V systems because it is specified for 3.3 V operation and includes shutdown control for power savings. The ADM232AARWZ is intended for 5 V systems and lacks a shutdown feature.