Overview
The ADM242AR, produced by Analog Devices Inc., is a high-speed RS-232 line driver/receiver integrated circuit. This device is part of the ADM222, ADM232A, and ADM242 family, which offers transmission rates up to 200 kB/s. It operates from a single 5 V power supply and utilizes an efficient on-chip charge pump with small external capacitors (0.1 µF) to generate the necessary RS-232 bipolar levels. The ADM242AR is fabricated using BiCMOS technology, combining low-power CMOS with high-speed bipolar circuitry, which minimizes quiescent power supply current to under 5 mA.
Key Specifications
| Parameter | Value |
|---|---|
| Manufacturer | Analog Devices Inc. |
| Package | 18-SOIC (0.295", 7.50mm Width) |
| Protocol | RS-232 |
| Number of Drivers/Receivers | 2/2 |
| Duplex | Full |
| Receiver Hysteresis | 400 mV |
| Data Rate | 200 kbps |
| Voltage - Supply | 4.5 V ~ 5.5 V |
| Operating Temperature | -40°C ~ 85°C |
| Mounting Type | Surface Mount |
Key Features
- High-speed transmission rates up to 200 kB/s.
- Operates from a single 5 V power supply with an efficient on-chip charge pump using small (0.1 µF) external capacitors.
- Two RS-232 drivers and two RS-232 receivers on each device.[
- BiCMOS technology combining low-power CMOS with high-speed bipolar circuitry.[
- Internal charge pump voltage doubler and voltage inverter generating ±10 V from the 5 V input.[
- Active low digital inputs for enabling/disabling the device and receiver outputs (ADM242 only).[
- Meets all EIA-232-E and V.28 specifications.[
Applications
- Computers and peripherals.[
- Modems.[
- Printers.[
- Instruments.[
Q & A
- What is the transmission rate of the ADM242AR? The transmission rate of the ADM242AR is up to 200 kB/s.
- What is the power supply voltage range for the ADM242AR? The power supply voltage range is 4.5 V to 5.5 V.
- How many drivers and receivers does the ADM242AR have? The ADM242AR has two RS-232 drivers and two RS-232 receivers.[
- What is the operating temperature range of the ADM242AR? The operating temperature range is -40°C to 85°C.[
- What type of package does the ADM242AR come in? The ADM242AR comes in an 18-SOIC package.[
- Does the ADM242AR meet RS-232 standards? Yes, the ADM242AR meets all EIA-232-E and V.28 specifications.[
- How does the ADM242AR generate RS-232 bipolar levels? The ADM242AR uses an on-chip charge pump with small external capacitors (0.1 µF) to generate the necessary RS-232 bipolar levels.[
- What is the receiver hysteresis of the ADM242AR? The receiver hysteresis is 400 mV.[
- Can the ADM242AR be disabled to minimize power consumption? Yes, the ADM242AR has an active low digital input (SHDN) to disable the device and minimize power consumption.[
- What technology is used in the fabrication of the ADM242AR? The ADM242AR is fabricated using BiCMOS technology, combining low-power CMOS with high-speed bipolar circuitry.[
