Overview
The ADM242ARZ-REEL, produced by Analog Devices Inc., is a high-speed RS-232 line driver/receiver integrated circuit. This device is part of the ADM222/ADM232A/ADM242 family, known for its advanced BiCMOS technology that combines low power CMOS with high-speed bipolar circuitry. It operates from a single 5 V power supply and includes an internal charge pump voltage doubler and inverter to generate the necessary ±10 V levels for RS-232 communication. The ADM242ARZ-REEL is designed to provide high transmission rates up to 200 kB/s while minimizing power consumption.
Key Specifications
| Parameter | Value |
|---|---|
| Supply Voltage | 5 V |
| Transmission Rate | Up to 200 kB/s |
| Number of Drivers | 2 |
| Number of Receivers | 2 |
| Quiescent Power Supply Current | < 5 mA |
| Transmitter Propagation Delay (TTL to RS-232) | 0.85 µs to 3.5 µs |
| Receiver Propagation Delay (RS-232 to TTL) | 0.1 µs to 0.5 µs |
| External Capacitors Required | Four 0.1 µF capacitors |
| Packaging | Tape & Reel (TR) |
Key Features
- High-speed RS-232 transmission rates up to 200 kB/s
- Single 5 V power supply with internal charge pump voltage doubler and inverter
- Low power consumption with quiescent current under 5 mA
- Two RS-232 drivers and two RS-232 receivers
- BiCMOS technology combining low power CMOS with high-speed bipolar circuitry
- Internal 400 kΩ pull-up resistors on TTL/CMOS inputs and internal 5 kΩ pull-down resistors on RS-232 inputs
- Active low digital input for shutdown (SHDN) and enable/disable (EN) for receivers (ADM242 only)
Applications
- Computers and peripherals
- Modems
- Printers
- Instruments
Q & A
- What is the operating voltage of the ADM242ARZ-REEL?
The ADM242ARZ-REEL operates from a single 5 V power supply. - What is the maximum transmission rate of the ADM242ARZ-REEL?
The maximum transmission rate is up to 200 kB/s. - How many RS-232 drivers and receivers does the ADM242ARZ-REEL have?
The device has two RS-232 drivers and two RS-232 receivers. - What type of technology is used in the ADM242ARZ-REEL?
The device uses BiCMOS technology, combining low power CMOS with high-speed bipolar circuitry. - What is the quiescent power supply current of the ADM242ARZ-REEL?
The quiescent power supply current is under 5 mA. - What external components are required for the internal charge pump?
Four external 0.1 µF capacitors are required. - What is the purpose of the SHDN and EN pins on the ADM242ARZ-REEL?
The SHDN pin is used to disable the device, minimizing power consumption. The EN pin (on ADM242 only) is used to enable or disable the receiver outputs. - In what applications is the ADM242ARZ-REEL typically used?
The device is typically used in computers, peripherals, modems, printers, and instruments. - What is the packaging type of the ADM242ARZ-REEL?
The packaging type is Tape & Reel (TR). - What are the internal pull-up and pull-down resistors on the ADM242ARZ-REEL?
There are internal 400 kΩ pull-up resistors on TTL/CMOS inputs and internal 5 kΩ pull-down resistors on RS-232 inputs.
