Overview
The ADM237LAN is a 5 V-powered CMOS RS-232 driver/receiver from Analog Devices Inc. This integrated circuit is part of the ADM2xx family, designed for EIA-232-E and V.28 communications interfaces. Although the ADM237LAN is currently obsolete and no longer manufactured, it remains relevant for understanding the capabilities and design of similar RS-232 transceivers. The device is particularly suited for applications where a single 5 V supply is available and low power consumption is critical, such as in battery-powered equipment.
Key Specifications
| Parameter | Value |
|---|---|
| Supply Voltage | 5 V |
| RS-232 Input Voltage Range | –30 V to +30 V |
| RS-232 Input Threshold Low | 0.8 V to 1.2 V |
| RS-232 Input Threshold High | 1.6 V to 2.4 V |
| RS-232 Input Hysteresis | 0.65 V |
| RS-232 Input Resistance | 3 kΩ to 5 kΩ |
| TTL/CMOS Output Voltage Low | 0.4 V |
| TTL/CMOS Output Voltage High | 3.5 V |
| Power Dissipation in Shutdown Mode | < 5 µW |
| Operating Temperature Range | 0°C to 85°C |
| Package Type | 24-PDIP |
Key Features
- Low power shutdown mode with power dissipation less than 5 µW, ideal for battery-powered equipment.
- Internal charge pump voltage converters to generate ±10 V from a single 5 V supply.
- Support for EIA-232-E and V.28 communications interfaces.
- Internal 400 kΩ pull-up resistors on TTL/CMOS inputs and internal 5 kΩ pull-down resistors on RS-232 inputs.
- Latch-up free operation.
Applications
- Computers and peripherals.
- Modems and printers.
- Instruments and other communication devices requiring RS-232 interfaces.
- Battery-powered equipment where low power consumption is critical.
Q & A
- What is the primary function of the ADM237LAN?
The ADM237LAN is a 5 V-powered CMOS RS-232 driver/receiver designed for EIA-232-E and V.28 communications interfaces. - Why is the ADM237LAN obsolete?
The ADM237LAN is no longer manufactured by Analog Devices Inc., but it remains relevant for understanding similar RS-232 transceivers. - What is the supply voltage for the ADM237LAN?
The supply voltage for the ADM237LAN is 5 V. - What is the input voltage range for RS-232 inputs on the ADM237LAN?
The RS-232 input voltage range is –30 V to +30 V. - Does the ADM237LAN have internal charge pump voltage converters?
Yes, the ADM237LAN includes internal charge pump voltage converters to generate ±10 V from a single 5 V supply. - What is the power dissipation in shutdown mode for the ADM237LAN?
The power dissipation in shutdown mode is less than 5 µW. - What are the typical applications for the ADM237LAN?
Typical applications include computers, peripherals, modems, printers, instruments, and other communication devices requiring RS-232 interfaces. - What is the operating temperature range for the ADM237LAN?
The operating temperature range is 0°C to 85°C. - What type of package does the ADM237LAN come in?
The ADM237LAN comes in a 24-PDIP package. - Does the ADM237LAN have internal pull-up and pull-down resistors?
Yes, it has internal 400 kΩ pull-up resistors on TTL/CMOS inputs and internal 5 kΩ pull-down resistors on RS-232 inputs.
