Overview
The ADM239LJR from Analog Devices Inc. is a highly integrated RS-232 line driver/receiver designed for a wide range of serial communication applications. This component is part of the ADM2xx family, which is known for its robust performance and low power consumption. The ADM239LJR is particularly suited for systems where a single 5 V power supply is available, and it does not require the traditional 12 V supply often needed for RS-232 interfaces.
Key Specifications
| Parameter | Value |
|---|---|
| Package Type | 24-lead SOIC |
| Operating Temperature Range | 0°C to 70°C |
| Power Supply | 5 V (with optional 12 V supply for some models) |
| Data Rate | Up to 120 kB/s |
| RS-232 Input Voltage Range | –30 V to +30 V |
| RS-232 Input Threshold Low | 0.8 V to 1.2 V |
| RS-232 Input Threshold High | 1.6 V to 2.4 V |
| RS-232 Input Hysteresis | 0.65 V |
| RS-232 Input Resistance | 3 kΩ to 5 kΩ |
| TTL/CMOS Output Voltage Low | 0.4 V |
| TTL/CMOS Output Voltage High | 3.5 V |
| Shutdown Supply Current | ≤1 µA |
Key Features
- Meets all EIA-232-E and V.28 specifications
- Single 5 V power supply operation with optional 12 V supply for some configurations
- On-board DC-DC converters for generating ±9 V output swing from a 5 V supply
- Low power shutdown mode reducing power dissipation to less than 5 µW
- No external components required for operation (except for some models)
- Internal charge pump voltage converters for converting 5 V to ±10 V
- High input impedance and low power consumption
- Latch-up free and internal pull-up/pull-down resistors on TTL/CMOS inputs
Applications
- Computers and peripherals
- Modems and printers
- Instruments and industrial control systems
- Battery-powered equipment due to low power shutdown mode
- Any system requiring RS-232 communication interface
Q & A
- What is the primary function of the ADM239LJR?
The primary function of the ADM239LJR is to act as a line driver/receiver for RS-232 serial communication interfaces. - What power supply options are available for the ADM239LJR?
The ADM239LJR can operate from a single 5 V power supply, with some configurations also supporting a 12 V supply. - What is the maximum data rate supported by the ADM239LJR?
The ADM239LJR supports data rates up to 120 kB/s. - What are the input voltage ranges for RS-232 inputs on the ADM239LJR?
The RS-232 input voltage range is –30 V to +30 V. - Does the ADM239LJR require external components for operation?
No, the ADM239LJR does not require any external components for operation, except for some specific models in the ADM2xx family. - What is the shutdown supply current of the ADM239LJR?
The shutdown supply current is less than 1 µA. - What are some typical applications of the ADM239LJR?
Typical applications include computers, peripherals, modems, printers, instruments, and battery-powered equipment. - Is the ADM239LJR latch-up free?
Yes, the ADM239LJR is latch-up free. - What is the package type of the ADM239LJR?
The package type is a 24-lead SOIC. - What is the operating temperature range of the ADM239LJR?
The operating temperature range is 0°C to 70°C.
