Overview
The ADM238LJR-REEL, produced by Analog Devices Inc., is a 5 V powered CMOS RS-232 driver/receiver. This component is part of the ADM2xx family, designed to meet all EIA-232-E and V.28 communications interface specifications. It is particularly useful in applications where a 12 V supply is not available. The ADM238LJR-REEL features internal charge pump voltage converters that allow operation from a single 5 V supply, converting it to the ±10 V required for RS-232 output.
Key Specifications
| Parameter | Value |
|---|---|
| Power Supply | Single 5 V |
| Data Rate | Up to 120 kB/s |
| RS-232 Output Swing | ±10 V |
| RS-232 Input Voltage Range | –30 V to +30 V |
| RS-232 Input Threshold | Low: 0.8 V to 1.2 V, 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, High: 3.5 V |
| Propagation Delay | 0.3 µs |
| Output Resistance | 300 Ω |
| Shutdown Supply Current | < 5 µW |
Key Features
- Internal charge pump voltage converters to generate ±10 V from a single 5 V supply.
- Low power shutdown mode with current dissipation less than 5 µW, ideal for battery-powered equipment.
- No external components required for operation, making it suitable for applications with limited PCB space.
- Latch-up free and supports TTL/CMOS input levels.
- Small 1 µF capacitors for charge pump operation.
Applications
- Computers and peripherals
- Modems
- Printers
- Instruments
- Battery-powered equipment due to its low power shutdown mode
Q & A
- What is the power supply requirement for the ADM238LJR-REEL?
The ADM238LJR-REEL operates from a single 5 V power supply.
- What is the data rate supported by the ADM238LJR-REEL?
The ADM238LJR-REEL supports data rates up to 120 kB/s.
- What are the RS-232 output voltage levels for the ADM238LJR-REEL?
The RS-232 output voltage levels are ±10 V.
- What is the input voltage range for the RS-232 inputs?
The RS-232 input voltage range is –30 V to +30 V.
- Does the ADM238LJR-REEL require external components for operation?
No, the ADM238LJR-REEL does not require any external components for operation.
- What is the shutdown supply current for the ADM238LJR-REEL?
The shutdown supply current is less than 5 µW.
- What are some typical applications for the ADM238LJR-REEL?
Typical applications include computers, peripherals, modems, printers, and battery-powered equipment.
- Is the ADM238LJR-REEL latch-up free?
Yes, the ADM238LJR-REEL is latch-up free).
- What is the propagation delay for the ADM238LJR-REEL?
The propagation delay is 0.3 µs).
- What is the output resistance of the ADM238LJR-REEL?
The output resistance is 300 Ω).
