Part A
ADM232AARN
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 4204 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 ADM232AARN and ADM238LARZ-REEL are both dual RS-232 line drivers/receivers in a 16-pin SOIC package, sharing the same pinout and supply voltage range, so the ADM238LARZ-REEL can serve as a functional replacement candidate for the ADM232AARN. However, the ADM238LARZ-REEL offers a higher data rate and lower power consumption, while the ADM232AARN provides a wider operating temperature range; designers should validate the specific data rate, supply current, and thermal requirements of their application before substituting.
Package Type
High match
Pin Configuration
High match
Data Rate
Validation required
Operating Temperature Range
Validation required
Parts at a glance
Part B
ADM238LARZ-REEL
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 196 個数
- Package
- SOIC-24
- Series
- インターフェース - ドライバ、レシーバ、トランシーバ
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | ADM232AARN | ADM238LARZ-REEL | Why it matters |
|---|---|---|---|
| Number of Drivers/Receivers | 2/2 | 4/4 | Determines how many RS-232 communication channels are available; a 4/4 device can serve more serial ports than a 2/2 device. |
| Data Rate | 200 kbps | 120 kbps | Maximum supported signaling speed; affects throughput capability of the serial link. |
| Supply Voltage | 5 V | 5 V | Operating supply voltage must match the system rail; both operate from a single 5 V supply. |
| Package / Mounting | 16-lead SOIC (surface mount) | 24-lead SOIC (surface mount) | Footprint and pin count differ, so the devices are not drop-in replacements on the same PCB layout. |
| Number of Pins | 16 | 24 | Pin count affects board layout and routing; a 24-pin part cannot fit a 16-pin footprint. |
| On-Chip Charge Pump | Yes | Yes | Integrated charge pumps generate the required RS-232 voltage levels from a single 5 V supply, eliminating external supplies. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Defines the environmental range over which the device is guaranteed to operate reliably. |
| Receiver Input Voltage Range | ±30 V | ±30 V | Indicates the fault-tolerant input range of the RS-232 receivers, important for robustness in harsh environments. |
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 | ADM232AARN | ADM238LARZ-REEL |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Obsolete | Active |
| Type | Transceiver | Transceiver |
| Protocol | RS232 | RS232 |
| Number of Drivers/Receivers | 2/2 | 4/4 |
| Duplex | Full | Full |
| Receiver Hysteresis | 400 mV | 650 mV |
| Data Rate | 200kbps | 120Kbps |
| Voltage - Supply | 4.5V ~ 5.5V | 4.75V ~ 5.25V |
| 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 ADM232AARN and ADM238LARZ-REEL?
The ADM232AARN is a dual RS-232 driver/receiver in a 16-lead narrow SOIC package, while the ADM238LARZ-REEL is a quad RS-232 driver/receiver in a 24-lead SOIC package supplied in tape-and-reel format. The ADM238LARZ-REEL provides four drivers and four receivers, whereas the ADM232AARN provides two drivers and two receivers.
Are the ADM232AARN and ADM238LARZ-REEL pin-to-pin compatible?
No. The ADM232AARN uses a 16-lead narrow SOIC package, and the ADM238LARZ-REEL uses a 24-lead SOIC package. The pin counts and pin functions differ, so they are not direct drop-in replacements for each other.
What supply voltage do the ADM232AARN and ADM238LARZ-REEL require?
Both devices operate from a single +5 V supply. The ADM232AARN and ADM238LARZ-REEL each include on-chip charge pump circuitry to generate the RS-232 voltage levels from the +5 V rail.
How many RS-232 drivers and receivers does each device provide?
The ADM232AARN integrates two RS-232 drivers and two RS-232 receivers. The ADM238LARZ-REEL integrates four RS-232 drivers and four RS-232 receivers, making it suitable for applications requiring more serial channels.
Do the ADM232AARN and ADM238LARZ-REEL 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 data-rate specification in the respective manufacturer datasheet for the target operating conditions.
What is the significance of the REEL suffix on the ADM238LARZ-REEL?
The REEL suffix indicates that the ADM238LARZ-REEL is supplied in tape-and-reel packaging, which is intended for automated pick-and-place assembly. The ADM232AARN is typically supplied in tube or standard packaging; the packaging difference does not affect the electrical function of the device.
Can the ADM232AARN be used as a substitute for the ADM238LARZ-REEL in an existing design?
Not directly. Because the ADM232AARN has fewer drivers and receivers and a different package and pinout than the ADM238LARZ-REEL, substitution requires a design review of channel count, PCB footprint, and pin assignments. The ADM232AARN should only be used where two drivers and two receivers are sufficient.