Part A
ADM232AARWZ
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 2354 個数
- Package
- SOIC-16
- Series
- インターフェース - ドライバ、レシーバ、トランシーバ
Replacement verdict
Compatible functional replacement candidate
The ADM232AARWZ and ADM234LAR are both dual RS-232 transceivers in a 16-pin SOIC package, sharing the same pin function arrangement and supply voltage range, so the ADM234LAR can serve as a functional replacement candidate for the ADM232AARWZ in many designs. However, the two devices differ in charge-pump architecture and external capacitor requirements, and the ADM234LAR provides a lower-power CMOS design with a slightly reduced driver output swing specification. Designers should validate the external capacitor configuration, data rate margin, and output drive levels against the target application before committing to the substitution.
Package Type
High match
Pin Configuration
High match
External Capacitor Requirements
Validation required
Driver Output Swing
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 | ADM232AARWZ | ADM234LAR | Why it matters |
|---|---|---|---|
| Number of Drivers/Receivers | 2/2 | 4/0 | Defines the channel configuration; a 2/2 transceiver is bidirectional RS-232, while a 4/0 device is a quad line driver only, so they are not functionally interchangeable. |
| Data Rate | 200 kbps | 120 kbps | Maximum signaling speed affects compatibility with high-baud peripherals and timing margins in the system. |
| Supply Voltage | 5 V | 5 V | Both operate from a single 5 V rail, so power-supply compatibility is maintained between the two parts. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | Industrial temperature range ensures reliable operation in harsh environments; identical ranges mean equivalent thermal robustness. |
| Package / Mounting | 16-SOIC (surface mount) | 14-SOIC (surface mount) | Different pin counts and footprints mean the parts are not drop-in replacements on the same PCB layout. |
| Integrated Charge Pump | Yes (on-chip) | Yes (on-chip) | On-chip charge pumps generate the required RS-232 voltage levels from a single 5 V supply, simplifying system design. |
| Receiver Input Voltage Range | ±30 V | N/A (driver only) | Wide receiver input range provides protection against overvoltage; the driver-only ADM234LAR has no receivers, so this spec does not apply. |
| Output Voltage Swing | ±5 V (typical) | ±5 V (typical) | RS-232 compliant output swing ensures interoperability with standard RS-232 receivers on the bus. |
| Shutdown / Enable Control | No | No | Neither device offers a shutdown mode, so both draw continuous supply current during operation. |
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 | ADM234LAR |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Type | Transceiver | Transceiver |
| Protocol | RS232 | RS232 |
| Number of Drivers/Receivers | 2/2 | 4/3 |
| 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 ADM234LAR?
The ADM232AARWZ is a dual RS-232 line driver/receiver from Analog Devices in a 16-lead SOIC_W package, while the ADM234LAR is a quad RS-232 driver/receiver in a 24-lead SOIC_W package. The ADM232A provides two drivers and two receivers, whereas the ADM234L provides four drivers and four receivers, making the ADM234LAR suitable for applications requiring more serial channels.
Are the ADM232AARWZ and ADM234LAR pin-to-pin compatible?
No. The ADM232AARWZ uses a 16-lead SOIC_W package, and the ADM234LAR uses a 24-lead SOIC_W package. The different pin counts and pinouts mean they are not drop-in replacements for each other and require different PCB footprints.
What supply voltage do the ADM232AARWZ and ADM234LAR require?
Both devices operate from a single +5 V supply. The ADM232AARWZ and ADM234LAR each include on-chip charge pump circuitry to generate the required RS-232 voltage levels from the +5 V input.
How many RS-232 drivers and receivers does each device provide?
The ADM232AARWZ provides two drivers and two receivers. The ADM234LAR provides four drivers and four receivers. The ADM234LAR is therefore preferred when more serial interface channels are needed in a single package.
Do the ADM232AARWZ and ADM234LAR support the same data rate?
Both devices are specified for RS-232 data rates up to 120 kbps, which is sufficient for standard RS-232 communication. Designers should confirm the exact datasheet conditions for each part when operating near the maximum rate.
Can the ADM232AARWZ be used as a substitute for the ADM234LAR in an existing design?
No, not directly. The ADM232AARWZ has fewer drivers and receivers (2/2 versus 4/4) and a different 16-lead package versus the 24-lead package of the ADM234LAR. A substitution would require redesign of the PCB layout and verification that two channels are sufficient for the application.
What are the operating temperature ranges for the ADM232AARWZ and ADM234LAR?
Both the ADM232AARWZ and ADM234LAR are specified for the industrial temperature range of -40°C to +85°C, making them suitable for industrial and embedded applications.