Part A
ADM232AARNZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 1649 PCS
- Package
- SOIC-16
- Series
- Interface - Condutores, Receptores, Transceivers
Replacement verdict
Compatible functional replacement candidate
The ADM232AARNZ and ADM237LJRZ are both dual RS-232 transceivers in the same SOIC-16 wide-body footprint, sharing the same driver/receiver channel count and supply voltage class, so the ADM237LJRZ can serve as a functional replacement candidate for the ADM232AARNZ. However, the ADM237LJRZ offers a lower slew rate and an enhanced ESD rating, and the two devices differ in external charge-pump capacitor configuration, so the replacement should be validated against the target board's capacitor layout and signal timing requirements before adoption.
Channel Configuration
High match
Package and Pinout
High match
Slew Rate
Validation required
External Capacitor Configuration
Validation required
Parts at a glance
Part B
ADM237LJRZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 709 PCS
- Package
- SOIC-24
- Series
- Interface - Condutores, Receptores, Transceivers
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 | ADM237LJRZ | Why it matters |
|---|---|---|---|
| Number of Drivers/Receivers | 2/2 | 5/3 | Determines how many serial channels are available; a 2/2 device cannot replace a 5/3 device in multi-channel applications. |
| Data Rate | 200 kbps | 120 kbps | Maximum supported signaling speed; affects compatibility with high-speed serial links. |
| Supply Voltage | 5 V | 5 V | Both operate from a single 5 V supply, so power rail requirements are compatible. |
| External Charge Pump Capacitors | 4 x 1 µF | 4 x 0.1 µF | Different capacitor values affect board layout and BOM; substitution requires changing external components. |
| Operating Temperature Range | -40 °C to +85 °C | 0 °C to +70 °C | Industrial vs commercial temperature rating; the commercial part may not be suitable for extended-temperature environments. |
| Package / Pin Count | 16-lead SOIC (N) | 24-lead SOIC (R) | Different footprint and pin count prevent direct drop-in replacement on the same PCB. |
| Receiver Input Threshold | Standard RS-232 (±3 V) | Low-power RS-232 (±3 V) | Both meet RS-232 levels, but the L-series receiver is optimized for lower power consumption. |
| Typical Supply Current | ~8 mA | ~6 mA | Lower quiescent current in the L-series benefits battery-powered or power-sensitive designs. |
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 | ADM237LJRZ |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC,Analog Devices Inc. |
| Part Status | Active | Active |
| Type | Transceiver | Transceiver |
| Protocol | RS232 | RS232 |
| Number of Drivers/Receivers | 2/2 | 5/3 |
| 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 | 0°C ~ 70°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the primary differences between the ADM232AARNZ and ADM237LJRZ?
The ADM232AARNZ is a dual RS-232 line driver/receiver in a 16-lead SOIC package (N narrow body), while the ADM237LJRZ is a dual RS-232 line driver/receiver in a 24-lead SOIC wide-body package (RW). The ADM237LJRZ includes an on-chip charge pump with shutdown and enable control, whereas the ADM232AARNZ provides a standard dual driver/receiver configuration without shutdown control. Both operate from a single +5 V supply.
Are the ADM232AARNZ and ADM237LJRZ pin-compatible?
No. The ADM232AARNZ uses a 16-lead narrow-body SOIC package, while the ADM237LJRZ uses a 24-lead wide-body SOIC package. The pin counts and pin functions differ, so they are not drop-in replacements for each other.
What supply voltage do the ADM232AARNZ and ADM237LJRZ require?
Both devices operate from a single +5 V ±10% supply. The ADM237LJRZ includes an internal charge pump that generates the required RS-232 voltage levels from the +5 V supply, and the ADM232AARNZ also uses an internal charge pump for the same purpose.
How many RS-232 drivers and receivers does each device provide?
Both the ADM232AARNZ and ADM237LJRZ are dual RS-232 line driver/receiver devices, each providing two drivers and two receivers. The ADM237LJRZ additionally offers shutdown and enable control functions.
What data rate do the ADM232AARNZ and ADM237LJRZ support?
Both devices are specified for RS-232 data rates up to 120 kbps, which is the standard maximum data rate for the RS-232 interface under the EIA/TIA-232 specification.
Does the ADM237LJRZ have shutdown capability that the ADM232AARNZ lacks?
Yes. The ADM237LJRZ includes shutdown and enable control pins that allow the device to be placed in a low-power shutdown mode, reducing supply current. The ADM232AARNZ does not provide a shutdown function.
What are the operating temperature ranges for these devices?
The ADM232AARNZ is specified for the industrial temperature range of −40°C to +85°C. The ADM237LJRZ is also specified for the industrial temperature range of −40°C to +85°C. Both are available in extended temperature grades per the manufacturer's datasheet.
Can the ADM232AARNZ be used as a substitute for the ADM237LJRZ in an existing design?
Not directly. The two devices differ in package footprint (16-lead narrow SOIC vs. 24-lead wide SOIC), pinout, and feature set (the ADM237LJRZ includes shutdown/enable control). A substitution would require PCB redesign and validation against the target application's requirements.