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 ADM232LAR is a viable functional replacement candidate for the ADM232AARWZ in most RS-232 interface applications, as both devices share the same dual-driver, dual-receiver architecture and 5 V single-supply operation. However, the ADM232LAR is specified for a lower maximum data rate and is supplied in a different package, so the design should be validated against the target data rate and PCB footprint before substitution.
Function and Configuration
High match
Supply Voltage
High match
Data Rate
Validation required
Package Type
Not compatible
Parts at a glance
Part B
ADM232LAR
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 6140 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 | ADM232LAR | 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 compatibility with higher-speed serial links; the AARWZ supports a faster rate. |
| Supply Voltage | 5 V | 5 V | Both operate from a single 5 V supply, so power rail requirements are identical. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | Identical industrial temperature range means both suit the same environmental conditions. |
| Package / Mounting | 16-SOIC (surface mount) | 16-SOIC (surface mount) | Same package and footprint allows direct board-level substitution without layout changes. |
| Number of Pins | 16 | 16 | Matching pin count supports drop-in replacement in existing designs. |
| Charge Pump / External Capacitors | Requires 4 external capacitors | Requires 4 external capacitors | Both use an internal charge pump with external capacitors, so the passive component count is the same. |
| Receiver Input Impedance | 5 kΩ (RS-232 standard) | 5 kΩ (RS-232 standard) | Standard RS-232 input impedance ensures interoperability with compliant drivers on both parts. |
| Manufacturer | Analog Devices | Analog Devices | Same manufacturer family simplifies qualification and documentation for substitution. |
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 | ADM232LAR |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Type | Transceiver | Transceiver |
| Protocol | RS232 | RS232 |
| Number of Drivers/Receivers | 2/2 | 2/2 |
| Duplex | Full | Full |
| Receiver Hysteresis | 400 mV | 650 mV |
| Data Rate | 200kbps | 120Kbps |
| Voltage - Supply | 4.5V ~ 5.5V | 4.5V ~ 5.5V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the key differences between the ADM232AARWZ and the ADM232LAR?
The ADM232AARWZ is a dual RS-232 line driver/receiver in a 16-lead SOIC_W package, specified for operation from a single 5 V supply. The ADM232LAR is a similar dual RS-232 transceiver in a 16-lead SOIC package, but it is specified for operation from a single 3.3 V supply. The ADM232AARWZ is a 5 V device, while the ADM232LAR is a 3.3 V device; they are not pin-for-pin functional equivalents across supply voltages.
Are the ADM232AARWZ and ADM232LAR pin-compatible?
Both devices are offered in 16-lead SOIC packages with the same pin count, but pin compatibility must be verified against the respective manufacturer datasheets. The ADM232AARWZ uses the SOIC_W (wide body) package, while the ADM232LAR uses the standard SOIC package; the package body widths differ, so PCB land patterns are not identical.
What supply voltage does each device require?
The ADM232AARWZ operates from a single 5 V supply. The ADM232LAR operates from a single 3.3 V supply. Designs must match the supply rail to the device variant; substituting one for the other without verifying the supply voltage is not recommended.
Can the ADM232LAR be used as a drop-in replacement for the ADM232AARWZ?
No. The two devices are specified for different supply voltages (3.3 V versus 5 V) and use different SOIC package body widths (standard SOIC versus SOIC_W). A direct drop-in replacement is not supported without design validation, including supply rail, logic levels, and PCB footprint.
What is the function of these devices?
Both the ADM232AARWZ and ADM232LAR are dual RS-232 line drivers/receivers intended to interface TTL/CMOS logic levels with RS-232 signal levels. Each device integrates charge pump circuitry to generate the RS-232 voltage levels from a single supply rail.
Do both devices support the same data rate?
Data rate specifications should be confirmed from the respective manufacturer datasheets. The ADM232AARWZ and ADM232LAR are both general-purpose RS-232 transceivers, but their guaranteed maximum data rates are specified separately for the 5 V and 3.3 V variants and should not be assumed identical without datasheet verification.
Which package options are available for each part?
The ADM232AARWZ is supplied in a 16-lead SOIC_W (wide body) package. The ADM232LAR is supplied in a 16-lead SOIC (narrow body) package. Because the package body widths differ, the PCB land patterns are not interchangeable.