Part A
ADM232LARZ
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 1315 PCS
- Package
- SOIC-16
- Series
- Interfaces - pilotes, récepteurs, émetteurs - récepteurs
Replacement verdict
Compatible functional replacement candidate
The ADM232LARZ and ADM232AARW-REEL are both dual RS-232 line drivers/receivers from Analog Devices with matching core function, channel count, and supply voltage requirements, making them a viable functional replacement candidate. The primary distinction lies in package format and operating temperature range, so design verification against the target board's footprint and thermal environment is recommended before substitution.
Function and Channel Count
High match
Supply Voltage Range
High match
Package Type
Validation required
Operating Temperature Range
Validation required
Parts at a glance
Part B
ADM232AARW-REEL
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 9934 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 | ADM232LARZ | ADM232AARW-REEL | Why it matters |
|---|---|---|---|
| Mounting Type | Surface Mount | Surface Mount | Both are surface-mount devices, so PCB footprint compatibility depends on the specific package rather than mounting style. |
| Package / Case | SOIC-16 (16-SOIC, 0.295", 7.50mm width) | SOIC-16 (16-SOIC, 0.295", 7.50mm width) | Package and pinout must match for a drop-in replacement; both use the same 16-lead wide-body SOIC outline. |
| Number of Drivers/Receivers | 2/2 | 2/2 | Defines the RS-232 channel count; both provide two drivers and two receivers, preserving interface capability. |
| Data Rate | 120 kbps | 120 kbps | Maximum signaling speed must meet the application's baud rate; both support up to 120 kbps. |
| Supply Voltage | 5 V (single supply, 4.5 V to 5.5 V) | 5 V (single supply, 4.5 V to 5.5 V) | Operating voltage range must match the system rail; both are 5 V single-supply devices. |
| 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. |
| Charge Pump / External Capacitors | Internal charge pump, 4 external capacitors | Internal charge pump, 4 external capacitors | External capacitor count affects board space and BOM; both require the same four charge-pump capacitors. |
| RoHS Compliance | RoHS compliant (Pb-free) | RoHS compliant (Pb-free) | Environmental compliance affects regulatory acceptance and solder process; both are RoHS compliant. |
| Packaging | Tube | Tape & Reel | Packaging format affects assembly line handling; tube suits low-volume, reel suits automated high-volume placement. |
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 | ADM232LARZ | ADM232AARW-REEL |
|---|---|---|
| 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 | 650 mV | 400 mV |
| Data Rate | 120Kbps | 200kbps |
| 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 ADM232LARZ and the ADM232AARW-REEL?
The ADM232LARZ is a dual RS-232 line driver/receiver in a 16-lead SOIC package (SOIC-16), while the ADM232AARW-REEL is the same dual RS-232 driver/receiver function supplied in a 16-lead wide-body SOIC (SOIC-16W) and delivered on tape and reel. Both are 5 V powered devices with two drivers and two receivers, but they differ in package body width and packaging format, which affects PCB land pattern and assembly handling.
Are the ADM232LARZ and ADM232AARW-REEL electrically interchangeable?
Functionally both are dual RS-232 transceivers with two drivers and two receivers operating from a single 5 V supply, and both use external charge-pump capacitors. However, interchangeability must be confirmed against the respective datasheets because the package footprint differs (narrow SOIC vs wide-body SOIC), and the "L" and "A" suffixes denote different product grades/series. A direct drop-in replacement should only be made after verifying pinout, package dimensions, and datasheet-specified parameters for the target design.
What package does the ADM232LARZ use and how does it differ from the ADM232AARW-REEL package?
The ADM232LARZ is supplied in a 16-lead narrow-body SOIC (SOIC-16, approximately 3.9 mm body width). The ADM232AARW-REEL is supplied in a 16-lead wide-body SOIC (SOIC-16W, approximately 7.5 mm body width) on tape and reel. The wider body changes the PCB land pattern and board space requirements, so layouts are not directly interchangeable without redesign.
What supply voltage do these devices require?
Both the ADM232LARZ and ADM232AARW-REEL are specified for single +5 V supply operation, consistent with the Analog Devices ADM232 family of RS-232 drivers/receivers. Designers should confirm the exact supply tolerance and current consumption from the respective datasheet revision before finalizing the power design.
How many drivers and receivers do these parts provide?
Both devices integrate two RS-232 drivers and two RS-232 receivers, matching the standard dual-transceiver configuration of the ADM232 family. This makes them suitable for interfacing a single UART or similar logic-level serial port to RS-232 levels.
Why is the ADM232AARW-REEL supplied on tape and reel while the ADM232LARZ is not described that way?
The "-REEL" suffix in ADM232AARW-REEL indicates the device is packaged on tape and reel for automated pick-and-place assembly. The ADM232LARZ part number as stated does not carry a reel suffix, so its shipping format should be confirmed with the distributor or manufacturer. Tape-and-reel packaging affects inventory handling and assembly line setup, not the electrical function of the device.
Can I substitute one part for the other in an existing PCB design?
Substitution requires validation. Because the ADM232LARZ uses a narrow-body SOIC-16 and the ADM232AARW-REEL uses a wide-body SOIC-16W, the PCB footprints differ and a direct drop-in is generally not possible without a layout change or adapter. Additionally, the different series suffixes ("L" vs "A") should be checked against the datasheets for any specification differences before substitution is approved.
What external components do these RS-232 transceivers require?
The ADM232 family uses external charge-pump capacitors to generate the RS-232 voltage levels from a single +5 V supply. The number and values of these capacitors are specified in the manufacturer datasheet, and designers should follow the datasheet's recommended capacitor configuration for the specific part and grade being used.