Overview
The ADM232AARW-REEL, produced by Analog Devices Inc., is a high-speed RS-232 line driver/receiver integrated circuit. It belongs to the ADM222, ADM232A, and ADM242 family, which offers transmission rates up to 200 kB/s. This device operates from a single 5 V power supply and utilizes an on-chip charge pump to generate the necessary RS-232 bipolar levels using small external capacitors. The ADM232AARW-REEL is designed to be pin-compatible with the MAX222/MAX232A/MAX242, making it a versatile upgrade for various applications.
Key Specifications
| Parameter | Value |
|---|---|
| Operating Voltage | 5 V |
| Transmission Rate | Up to 200 kB/s |
| RS-232 Drivers | 2 |
| RS-232 Receivers | 2 |
| Quiescent Power Supply Current | < 5 mA |
| Transition Region Slew Rate | 3 to 30 V/µs (CL = 50 pF to 1000 pF, RL = 3 kΩ to 7 kΩ) |
| Transmitter Propagation Delay (TTL to RS-232) | 0.85 to 3.5 µs |
| Receiver Propagation Delay (RS-232 to TTL) | 0.1 to 0.5 µs |
| External Capacitors Required | 4 x 0.1 µF |
Key Features
- High-speed transmission rates up to 200 kB/s
- Single 5 V power supply operation
- On-chip charge pump for generating ±10 V from 5 V input
- Low power consumption with quiescent current under 5 mA
- Pin-compatible with MAX222/MAX232A/MAX242
- Internal 400 kΩ pull-up resistors on TTL/CMOS inputs and 5 kΩ pull-down resistors on RS-232 inputs
- Enable and shutdown functions for power management
Applications
- Computers and peripherals
- Modems
- Printers
- Instruments
Q & A
- What is the operating voltage of the ADM232AARW-REEL? The operating voltage is 5 V.
- What is the maximum transmission rate of the ADM232AARW-REEL? The maximum transmission rate is up to 200 kB/s.
- How many RS-232 drivers and receivers does the ADM232AARW-REEL have? It has 2 RS-232 drivers and 2 RS-232 receivers.
- What is the quiescent power supply current of the ADM232AARW-REEL? The quiescent power supply current is under 5 mA.
- What is the purpose of the on-chip charge pump in the ADM232AARW-REEL? The on-chip charge pump generates ±10 V from the 5 V input supply.
- What external components are required for the charge pump? Four 0.1 µF external capacitors are required.
- Is the ADM232AARW-REEL pin-compatible with other devices? Yes, it is pin-compatible with MAX222/MAX232A/MAX242.
- What are the typical applications of the ADM232AARW-REEL? Typical applications include computers, peripherals, modems, printers, and instruments.
- How does the ADM232AARW-REEL manage power consumption? It has enable and shutdown functions to minimize power consumption.
- What is the slew rate of the ADM232AARW-REEL? The slew rate is between 3 to 30 V/µs (CL = 50 pF to 1000 pF, RL = 3 kΩ to 7 kΩ).
