MAX244CQH-D

Overview

The MAX244CQH-D is a +5V-powered, multichannel RS-232 driver and receiver integrated circuit manufactured by Analog Devices Inc./Maxim Integrated. It operates within a single +5V supply range of 4.5V to 5.5V and supports data rates up to 120 kbps. The device features eight drivers and ten receivers with full-duplex communication capability. It utilizes an internal charge pump to generate the required ±10V levels for RS-232 signaling without external bipolar supplies. The component is housed in a 44-pin PLCC package and is rated for operation between 0°C and +70°C.

Feature Summary

• Integrates dual charge-pump DC-DC voltage converters to generate internal ±10V rails from a single +5V supply
• Provides eight RS-232 drivers and ten RS-232 receivers for high-channel-count serial communications
• Supports full-duplex data transmission at speeds up to 120 kbps
• Designed for EIA/TIA-232E and V.28/V.24 interface compliance

Applications

• Interface translation between TTL/CMOS logic and RS-232 standards
• Multidrop RS-232 network connections
• Portable diagnostics equipment requiring single-supply operation

Procurement Notes

Verify the specific ordering suffix '-D' against official documentation to confirm the exact temperature grade and packaging configuration. Confirm that the component meets all necessary regulatory requirements for the intended deployment environment before finalizing procurement decisions.

Selection Notes

Select this component when designing systems requiring multiple RS-232 channels driven by a single +5V source. Ensure the application does not require shutdown modes or low-power standby features, as these are not standard for this specific part variant. Verify that the 44-pin PLCC footprint aligns with the target PCB layout constraints.

Part Context

This device belongs to the MAX220–MAX249 family of line drivers and receivers designed for applications where ±12V supplies are unavailable. The MAX244 specifically addresses needs for higher channel density compared to standard dual-driver interfaces, facilitating complex serial communication architectures in space-constrained designs.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation.