Part A
ADM232AARNZ
ADI公司
- Lifecycle
- Active
- Stock
- 1649 件
- Package
- SOIC-16
- Series
- 介面-驅動器、接收器、收發器
Replacement verdict
Compatible functional replacement candidate
The ADM231LJRZ can serve as a functional replacement candidate for the ADM232AARNZ in many RS-232 interface applications, as both are dual-channel drivers/receivers in the same SOIC-16 package with comparable supply voltage ranges. However, the ADM231LJRZ operates as a low-power device with a reduced slew rate and lower data rate capability, so the replacement is only appropriate where the higher data rate and faster slew rate of the ADM232AARNZ are not required. Designers should validate the reduced driver output swing and data rate against the target application before committing to the substitution.
Function and Channel Configuration
High match
Package Type
High match
Data Rate
Validation required
Slew Rate
Validation required
Parts at a glance
Part B
ADM231LJRZ
ADI公司
- Lifecycle
- Active
- Stock
- 9568 件
- Package
- SOIC-16
- Series
- 介面-驅動器、接收器、收發器
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 | ADM231LJRZ | 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; the ADM232A supports faster communication. |
| Supply Voltage | 5 V (single supply) | 3.3 V (single supply) | Operating supply voltage must match the system rail; these parts are not directly interchangeable without level considerations. |
| Number of Charge Pump Capacitors | 4 external capacitors | 4 external capacitors | 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 | -40°C to +85°C | Industrial temperature range suitability is identical, so both can be used in the same thermal environments. |
| Package | 16-lead SOIC (N) | 16-lead SOIC (R) | Package footprint and pinout must match for drop-in substitution; both are 16-lead SOIC but pinouts differ between the A and L families. |
| Receiver Input Threshold | Standard RS-232 (±3 V) | Standard RS-232 (±3 V) | RS-232 compliance ensures interoperability with standard serial ports; both meet the standard threshold. |
| Shutdown / Low-Power Mode | No shutdown pin | No shutdown pin | Neither device offers a shutdown feature, so power management behavior is equivalent. |
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 | 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 ADM232AARNZ and ADM231LJRZ?
The ADM232AARNZ is a dual RS-232 line driver/receiver from Analog Devices in a 16-lead SOIC package (N narrow body), while the ADM231LJRZ is a lower-power RS-232 transceiver in a 16-lead SOIC package (R wide body). The ADM232A operates from a single +5 V supply and includes two drivers and two receivers with internal charge pump capacitors. The ADM231L is a +5 V powered transceiver with a low-power shutdown mode and operates at lower supply current. Package width (N vs R) and power/shutdown features are the primary differentiators.
Are the ADM232AARNZ and ADM231LJRZ pin-compatible?
No. The ADM232AARNZ uses the 16-lead narrow-body SOIC (N) pinout, while the ADM231LJRZ uses the 16-lead wide-body SOIC (R) pinout. Pin functions and assignments differ between the two devices, so they are not drop-in replacements for each other. PCB land patterns and pin routing must be verified against each device's datasheet before substitution.
What supply voltage do the ADM232AARNZ and ADM231LJRZ require?
Both devices operate from a single +5 V supply. The ADM232AARNZ is specified for +5 V operation with an internal charge pump generating the RS-232 voltage levels. The ADM231LJRZ is also a +5 V powered RS-232 transceiver. Designs should confirm the exact supply tolerance and current requirements from the respective Analog Devices datasheets.
How many drivers and receivers does each device provide?
The ADM232AARNZ provides two RS-232 drivers and two RS-232 receivers. The ADM231LJRZ is a single-channel RS-232 transceiver with one driver and one receiver. The channel count difference is significant for designs requiring multiple RS-232 lines.
Does the ADM231LJRZ have a shutdown or low-power mode?
Yes. The ADM231LJRZ includes a low-power shutdown mode that reduces supply current when the transceiver is not in use. The ADM232AARNZ does not provide a comparable shutdown feature; it operates continuously when powered. This makes the ADM231LJRZ preferable for power-sensitive applications.
What package types are used for the ADM232AARNZ and ADM231LJRZ?
Both devices are offered in 16-lead SOIC packages, but with different body widths. The ADM232AARNZ uses the narrow-body SOIC (N) package, while the ADM231LJRZ uses the wide-body SOIC (R) package. The package suffix in the part number (N vs R) indicates this difference, and PCB footprint compatibility must be checked accordingly.
Can the ADM231LJRZ replace the ADM232AARNZ in an existing design?
Not directly. The ADM231LJRZ has only one driver and one receiver versus two of each on the ADM232AARNZ, uses a different package width, and has a different pinout. A replacement would require schematic and layout changes, plus verification of the reduced channel count against system requirements. Consult both Analog Devices datasheets before considering substitution.