Overview
The ADM241LJRS-REEL is a quad transmitter and quint receiver RS-232 transceiver produced by Analog Devices Inc. This integrated circuit is designed to meet the EIA-232-E and V.28 specifications, making it suitable for a wide range of serial communication applications. It operates on a single 5 V power supply and integrates on-board dc-to-dc converters to generate the necessary ±9 V output swing required for RS-232 communication. The device is particularly useful in battery-powered systems due to its low power shutdown mode, which reduces power dissipation to less than 5 µW.
Key Specifications
| Parameter | Value | Notes |
|---|---|---|
| Voltage - Supply | 4.75 V to 5.25 V | |
| Number of Drivers/Receivers | 4/5 | |
| Package / Case | 28-SSOP (0.209", 5.30mm Width) | |
| Protocol | RS232 | |
| Data Rate | Up to 120 kbps | |
| Output Enable Time (TEN) | 250 ns | For ADM236L, ADM239L, ADM241L (CL = 150 pF) |
| Output Disable Time (TDIS) | 50 ns | For ADM236L, ADM239L, ADM241L (RL = 1 kΩ) |
| Propagation Delay | 0.3 µs | RS-232 to TTL Transition |
| Slew Rate | 8 V/µs | RL = 3 kΩ, CL = 2500 pF |
| Output Resistance | 300 Ω | VCC = V+ = V– = 0 V, VOUT = ±2 V |
| RS-232 Output Short-Circuit Current | ±10 mA |
Key Features
- Single 5 V power supply with integrated on-board dc-to-dc converters to generate ±9 V output swing.
- Meets all EIA-232-E and V.28 specifications.
- Data rate up to 120 kbps.
- Low power shutdown mode reducing power dissipation to less than 5 µW, suitable for battery-powered systems.
- Enable (EN) function for receivers, placing outputs in a high impedance state when disabled.
- CMOS technology for minimal power dissipation.
- Internal charge pump voltage converter and level-shifting transmitters and receivers.
Applications
- Battery-powered systems due to its low power shutdown mode.
- Space-saving applications, especially with models like the ADM233L which have charge pump capacitors molded into the package.
- General serial communication applications requiring RS-232 interface.
- Microprocessor data bus connections.
- Sharing common lines or facilitating multiple device connections.
Q & A
- What is the primary function of the ADM241LJRS-REEL?
The ADM241LJRS-REEL is a quad transmitter and quint receiver RS-232 transceiver, designed for serial communication applications.
- What is the operating voltage range of the ADM241LJRS-REEL?
The operating voltage range is 4.75 V to 5.25 V.
- What is the maximum data rate supported by the ADM241LJRS-REEL?
The maximum data rate supported is up to 120 kbps.
- Does the ADM241LJRS-REEL have a low power mode?
Yes, it features a low power shutdown mode that reduces power dissipation to less than 5 µW.
- What package type is the ADM241LJRS-REEL available in?
The device is available in a 28-SSOP package.
- What are the key specifications for output enable and disable times?
The output enable time (TEN) is 250 ns, and the output disable time (TDIS) is 50 ns for specific models.
- What is the propagation delay for RS-232 to TTL transition?
The propagation delay is 0.3 µs.
- What is the slew rate of the transmitter output?
The slew rate is 8 V/µs under specified conditions.
- Is the ADM241LJRS-REEL suitable for battery-powered systems?
Yes, it is particularly useful in battery-powered systems due to its low power shutdown mode.
- What are some common applications of the ADM241LJRS-REEL?
Common applications include general serial communication, battery-powered systems, and microprocessor data bus connections.
