Overview
The ADM239LJRZ is a member of the ADM2xx family of line drivers and receivers produced by Analog Devices Inc. This component is designed to meet the requirements of EIA-232-E and V.28 communications interfaces, particularly in applications where 12 V is available. The ADM239LJRZ operates from both 5 V and 12 V supplies, utilizing an internal charge pump voltage converter to generate the necessary ±12 V for RS-232 output levels. This device is well-suited for various communication needs, including battery-powered equipment and space-constrained applications.
Key Specifications
| Parameter | Value |
|---|---|
| Power Supply | 5 V and 12 V |
| 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 7 kΩ |
| TTL/CMOS Output Voltage Low | 0.4 V |
| TTL/CMOS Output Voltage High | 3.5 V |
| Shutdown Supply Current | 1 µA to 10 µA |
| Operating Temperature Range | 0°C to 85°C |
Key Features
- Operates from single 5 V or dual 5 V and 12 V supplies.
- Internal charge pump voltage converter generates ±12 V for RS-232 output levels.
- Low power shutdown mode reduces power dissipation to less than 5 µW.
- High impedance state when receivers are disabled.
- Internal pull-up and pull-down resistors on TTL/CMOS and RS-232 inputs, respectively.
- Latch-up free and CMOS technology for minimal power dissipation.
Applications
- Computers and peripherals.
- Modems and printers.
- Instruments and battery-powered equipment.
- Industrial and automotive interfaces.
- Any application requiring EIA-232-E and V.28 communications interfaces.
Q & A
- What is the primary function of the ADM239LJRZ?
The primary function of the ADM239LJRZ is to act as a line driver and receiver for EIA-232-E and V.28 communications interfaces. - What power supplies can the ADM239LJRZ operate from?
The ADM239LJRZ can operate from both 5 V and 12 V supplies. - What is the RS-232 input voltage range of the ADM239LJRZ?
The RS-232 input voltage range is –30 V to +30 V. - Does the ADM239LJRZ have a low power shutdown mode?
Yes, the ADM239LJRZ features a low power shutdown mode that reduces power dissipation to less than 5 µW. - What is the typical operating temperature range for the ADM239LJRZ?
The typical operating temperature range is 0°C to 85°C. - Are there internal pull-up and pull-down resistors on the inputs?
Yes, there are internal 400 kΩ pull-up resistors on TTL/CMOS inputs and 5 kΩ pull-down resistors on RS-232 inputs. - Is the ADM239LJRZ latch-up free?
Yes, the ADM239LJRZ is latch-up free. - What technology is used to minimize power dissipation in the ADM239LJRZ?
CMOS technology is used to minimize power dissipation. - Can the ADM239LJRZ be used in battery-powered equipment?
Yes, it is particularly useful in battery-powered systems due to its low power shutdown mode. - What are some common applications for the ADM239LJRZ?
Common applications include computers, peripherals, modems, printers, instruments, and any application requiring EIA-232-E and V.28 communications interfaces.
