Part A
ADM232AARNZ-REEL
Компания Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6073 ПКС
- Package
- SOIC-16
- Series
- Интерфейс - драйверы, приемники, передатчики
Replacement verdict
Compatible functional replacement candidate
The ADM231LAR and ADM232AARNZ-REEL are both dual RS-232 line drivers/receivers in the same SOIC-16 package, but they differ in charge-pump architecture, external capacitor requirements, and guaranteed data rate. The ADM231LAR is a viable functional substitute for the ADM232AARNZ-REEL only after confirming the lower data-rate limit and the different external capacitor configuration are acceptable for the target design.
Data Rate
Validation required
External Capacitor Configuration
Validation required
Package Type
High match
Driver/Receiver Channel Count
High match
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-REEL | ADM231LAR | Why it matters |
|---|---|---|---|
| Number of Drivers | 2 | 2 | Driver count determines how many RS-232 transmit lines the device can support; both provide two drivers, so transmit capability is equivalent. |
| Number of Receivers | 2 | 2 | Receiver count determines how many RS-232 receive lines are supported; both offer two receivers, matching typical full-duplex or dual-channel needs. |
| Data Rate | 200 kbps | 120 kbps | Maximum data rate affects throughput; the ADM232A supports a higher rate, which may matter for faster serial links. |
| Supply Voltage | 5 V | 5 V | Operating supply voltage must match the system rail; both operate from a single 5 V supply, so power-rail compatibility is identical. |
| Charge Pump / External Capacitors | Requires external charge-pump capacitors | Requires external charge-pump capacitors | Both use an internal charge pump with external capacitors to generate RS-232 voltage levels; board space and BOM impact are similar. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Temperature range determines suitability for industrial vs. commercial environments; both cover the industrial range. |
| Package | 16-lead SOIC (narrow) | 16-lead SOIC (narrow) | Package footprint and pinout must match for drop-in substitution; both are 16-lead narrow SOIC, so PCB layout compatibility is preserved. |
| Mounting Type | Surface Mount | Surface Mount | Mounting style must match the assembly process; both are surface-mount devices. |
| RoHS Compliance | RoHS compliant | RoHS compliant | RoHS status affects regulatory compliance and market access; both parts are RoHS compliant. |
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-REEL | ADM231LAR |
|---|---|---|
| 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-REEL and the ADM231LAR?
The ADM232AARNZ-REEL is a dual RS-232 line driver/receiver from Analog Devices supplied in a 16-lead SOIC package and delivered on tape and reel, while the ADM231LAR is a lower-power RS-232 transceiver in a 14-lead SOIC package. The ADM232A operates from a single +5 V supply and includes an on-chip charge pump, whereas the ADM231L is specified for +5 V operation with a low-power shutdown mode. Package pin count and pinout differ, so they are not pin-compatible substitutes.
Are the ADM232AARNZ-REEL and ADM231LAR pin-to-pin compatible?
No. The ADM232AARNZ-REEL uses a 16-lead SOIC package, while the ADM231LAR uses a 14-lead SOIC package. The different lead counts and pin assignments mean the two devices cannot be interchanged on the same PCB footprint without layout changes.
What supply voltage do these devices require?
Both the ADM232AARNZ-REEL and the ADM231LAR are specified for operation from a single +5 V supply. The ADM232A integrates an on-chip dual charge pump to generate the positive and negative RS-232 voltage levels from the +5 V rail, and the ADM231L likewise operates from +5 V with its internal charge pump circuitry.
How many RS-232 drivers and receivers does each device provide?
The ADM232AARNZ-REEL provides two RS-232 drivers and two RS-232 receivers. The ADM231LAR provides two RS-232 drivers and two RS-232 receivers as well, but in a smaller 14-lead package. Both are dual transceivers, so the channel count is the same; the difference lies in package, pinout, and power-management features.
Does the ADM231LAR offer a shutdown or low-power mode?
Yes. The ADM231LAR includes a low-power shutdown mode that reduces supply current when the transceiver is not in use. The ADM232AARNZ-REEL does not provide a comparable shutdown control; it is intended for continuous operation from the +5 V supply with its internal charge pump active.
What data rate can these RS-232 transceivers support?
Both the ADM232AARNZ-REEL and the ADM231LAR are specified by Analog Devices for RS-232 data rates up to 120 kbps, which is sufficient for standard RS-232 serial communication. Designers should confirm the exact rated condition in the respective datasheet for their target application.
What is the significance of the -REEL suffix on the ADM232AARNZ-REEL?
The -REEL suffix indicates that the ADM232AARNZ-REEL is supplied on tape and reel for automated pick-and-place assembly. The base part, ADM232AARNZ, is the same device in a 16-lead SOIC package; the reel packaging is a logistics distinction rather than an electrical or functional one.
Can the ADM231LAR be used as a drop-in replacement for the ADM232AARNZ-REEL?
No. Because the ADM231LAR is a 14-lead SOIC device and the ADM232AARNZ-REEL is a 16-lead SOIC device, the footprints and pinouts differ. A replacement requires PCB layout changes and verification of the surrounding RS-232 interface circuitry against the ADM231LAR datasheet before substitution.