MAX244CQH

Overview

The MAX244CQH is a multichannel RS-232 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It operates on a single +5V power supply and features eight drivers and ten receivers for full-duplex communication. The device supports data rates up to 120 kb/s with propagation delays of 3.5 us and 1.5 us. It is housed in a PLCC-44 surface-mount package and functions within an operating temperature range of 0°C to +70°C. The component draws 30 mA of operating current and lacks ESD protection or shutdown capabilities.

Feature Summary

• Provides multichannel RS-232 signal conversion for serial communication interfaces
• Integrates eight drivers and ten receivers to support complex system connectivity
• Operates exclusively on a single +5V power supply without requiring negative voltages

Applications

• Industrial control systems requiring multiple RS-232 ports
• Data acquisition equipment with high channel density
• Embedded systems utilizing PLCC-44 form factors

Procurement Notes

Verify the specific suffix designation, as the provided documentation references the MAX244CQH+D variant which is listed as obsolete. Confirm availability through authorized distributors or secondary markets, as standard new production may be discontinued. Ensure the PLCC-44 package matches the target PCB footprint and that the absence of ESD protection meets the application's environmental requirements.

Selection Notes

Select this component when designing systems requiring eight independent transmit channels and ten receive lines within a single integrated circuit. It is suitable for applications where space efficiency is prioritized over individual line drivers. Verify that the 120 kb/s speed limit and lack of ESD protection are acceptable for the intended signal integrity and environmental conditions.

Part Context

This part belongs to the MAX244 series of RS-232 interface ICs from Maxim Integrated. It serves as a high-density solution compared to standard single-channel transceivers like the MAX232. The PLCC-44 package allows for compact board layouts in legacy or specialized industrial designs requiring multiple serial connections.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Check for pin-compatible alternatives within the MAX244 family or newer generations if the obsolete status prevents procurement.