MAX244C/D

Overview

The MAX244C/D is a +5V-powered, multichannel RS-232 transceiver from the MAX220–MAX249 family. It operates on a single +5V supply and utilizes internal charge-pump circuitry to generate ±10V for driver operation without external bipolar supplies. The device features 8 drivers and 10 receivers with full-duplex communication capability. It supports data rates up to 120 kb/s and includes TTL/CMOS-compatible inputs and outputs. The component is available in PLCC-44 packages and functions within an operating temperature range of 0°C to +70°C.

Feature Summary

• Integrated dual charge-pump DC-DC voltage converters eliminate the need for external bipolar power supplies
• Supports full-duplex communication with multiple independent transmitter and receiver channels
• Compatible with EIA/TIA-232E and V.28/V.24 standards using a single +5V supply

Applications

• Interface translation between TTL/CMOS logic and RS-232 levels
• Multidrop RS-232 network connections
• Portable diagnostics equipment requiring low-power serial communication

Procurement Notes

Verify the specific suffix (C or D) against the manufacturer's current ordering information table to confirm package type and temperature grade. Confirm RoHS compliance status as indicated in the datasheet specifications. Ensure the selected variant matches the required pin configuration and thermal performance for the target application environment.

Selection Notes

Select this component when designing systems that require multiple RS-232 channels but lack access to negative voltage rails. The integrated charge pumps simplify board layout by removing external inductor-based converters. Consider the high supply current requirements during normal operation compared to shutdown modes when evaluating system power budgets.

Part Context

This part belongs to the Maxim Integrated MAX220–MAX249 family of line drivers and receivers. The family offers various channel configurations and package options to suit different interface density requirements. These devices are designed specifically for applications where generating ±12V or ±10V supplies is impractical due to space or cost constraints.

Replacement Considerations

Direct replacements include other members of the MAX220–MAX249 family such as the MAX245, MAX246, or MAX247, provided they offer compatible channel counts and control pin configurations. Verify that any substitute maintains the same PLCC-44 footprint and electrical characteristics for seamless integration.