Part A
ADM232LARZ
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 1315 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 ADM232LARZ is a compatible functional replacement candidate for the ADM232AARWZ, sharing the same dual RS-232 driver/receiver function, SOIC-16 package, and 5 V supply architecture, while offering lower quiescent current and a reduced external capacitor count. Designers should validate the low-power operating mode behavior and confirm the charge pump capacitor configuration against the target application before final qualification.
Function and Interface Type
High match
Package and Pinout
High match
Supply Current and Power Mode
Validation required
External Capacitor Configuration
Validation required
Parts at a glance
Part B
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
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 | ADM232LARZ | Why it matters |
|---|---|---|---|
| Data Rate | 200 kbps | 120 kbps | Maximum guaranteed data rate; the AARWZ supports higher throughput, which may matter for faster serial links. |
| Operating Supply Voltage | 5 V | 3.0 V to 5.5 V | The LARZ supports lower supply voltages, enabling 3.3 V system compatibility that the 5 V-only AARWZ cannot provide. |
| Package / Mounting | 16-Lead SOIC (Wide), Surface Mount | 20-Lead SOIC (Wide), Surface Mount | Different package footprints and pin counts affect PCB layout and drop-in substitutability. |
| Number of Drivers / Receivers | 2 / 2 | 2 / 2 | Both provide two RS-232 drivers and two receivers, matching the core channel count for serial interface needs. |
| External Capacitors Required | 4 external capacitors (charge pump) | 4 external capacitors (charge pump) | Both require external charge-pump capacitors; board space and BOM impact are similar. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Identical industrial temperature range supports use in the same environmental conditions. |
| RS-232 Output Swing | ±5 V (typical, at 5 V supply) | ±5 V (typical, at 5 V supply) | Both meet RS-232 signal levels, ensuring interoperability with standard RS-232 peripherals. |
| Shutdown / Low-Power Mode | No shutdown pin | No shutdown pin | Neither offers a shutdown mode, so power management behavior is comparable. |
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Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADM232LARZ | ADM232AARWZ |
|---|---|---|
| Part Status | Active | Active |
| 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 ADM232AARWZ and ADM232LARZ?
The ADM232AARWZ is a dual RS-232 line driver/receiver from Analog Devices that operates from a single +5 V supply and supports data rates up to 200 kbps. The ADM232LARZ is a low-power variant of the same RS-232 transceiver family, offering reduced supply current for power-sensitive applications. Both are pin-compatible in the same SOIC-16 (RW-16) package, but they differ in supply current consumption and specified data rate characteristics per their respective datasheets.
Are the ADM232AARWZ and ADM232LARZ pin-compatible?
Yes. Both devices are offered in the same 16-lead SOIC (RW-16) package with identical pin assignments, allowing them to share the same PCB footprint. Designers should still verify the specific datasheet for each part to confirm all pin functions match for their application.
What supply voltage do these devices require?
Both the ADM232AARWZ and ADM232LARZ operate from a single +5 V supply. They incorporate on-chip charge pump circuitry to generate the positive and negative RS-232 voltage levels required for compliant RS-232 communication without needing an external ±12 V supply.
How do the supply currents of the ADM232AARWZ and ADM232LARZ compare?
The ADM232LARZ is specified as a low-power version with reduced supply current compared to the ADM232AARWZ. The "L" designation in the ADM232LARZ part number indicates the low-power variant. For exact supply current specifications, refer to the respective Analog Devices datasheets, as values depend on load and operating conditions.
What data rate do these RS-232 transceivers support?
The ADM232AARWZ supports data rates up to 200 kbps, which exceeds the standard RS-232 requirement of 20 kbps. The ADM232LARZ is also specified for RS-232 data rates suitable for standard serial communication; designers should confirm the exact rated data rate in the ADM232LARZ datasheet for their target throughput requirements.
How many drivers and receivers do these devices integrate?
Both the ADM232AARWZ and ADM232LARZ integrate two RS-232 drivers and two RS-232 receivers in a single package, making them suitable for dual-channel serial interfaces such as those used in computers, peripherals, and industrial equipment.
Can the ADM232LARZ be used as a drop-in replacement for the ADM232AARWZ?
Because both parts share the same SOIC-16 package and pinout, the ADM232LARZ can often serve as a replacement where lower supply current is desired. However, designers must verify that the ADM232LARZ meets the data rate, output voltage swing, and load requirements of the specific application by consulting the Analog Devices datasheet before substituting.
What is the operating temperature range for these devices?
Both the ADM232AARWZ and ADM232LARZ are specified for industrial temperature range operation, typically −40 °C to +85 °C, as indicated by the "A" grade designation in the part numbers. Confirm the exact temperature specification in the respective Analog Devices datasheets for the target design.