MAX248CQH+D

Overview

The MAX248CQH+D is a +5V-powered, multichannel RS-232 transceiver from the MAX220–MAX249 family. It integrates eight drivers and eight receivers for full-duplex communication at data rates up to 120 kb/s. The device operates on a single +5V supply by utilizing an internal dual charge-pump circuit to generate ±10V levels, eliminating the need for external bipolar supplies. It features a shutdown mode that reduces power consumption to 5μW. The component is housed in a 44-pin PLCC package and supports an industrial operating temperature range of -40°C to +85°C.

Feature Summary

• Integrates dual charge-pump voltage converters to generate required RS-232 signal levels from a single +5V source
• Provides eight independent driver channels and eight receiver channels for high-density serial communication
• Includes a low-power shutdown mode to minimize energy consumption during idle periods

Applications

• Multidrop RS-232 networks
• Portable diagnostics equipment
• Interface translation systems

Procurement Notes

Verify the specific suffix 'Q' against official documentation to confirm the extended temperature rating (-40°C to +85°C) and ensure the '+D' designation matches the intended PLCC-44 package type. Cross-reference the manufacturer's current product status to confirm availability before finalizing procurement plans.

Selection Notes

Select this component when designing systems requiring multiple RS-232 channels within a constrained PCB footprint. It is suitable for applications where generating negative voltages is undesirable or impossible due to space constraints. Ensure the design accommodates the necessary external capacitors for the charge pump if not using an integrated variant.

Part Context

This part belongs to the MAX220–MAX249 family of line drivers and receivers designed for EIA/TIA-232E and V.28/V.24 interfaces. The family offers various channel counts and package options to address different integration needs while maintaining compatibility with standard TTL/CMOS logic levels.

Replacement Considerations

Compatible substitutes include other members of the MAX220–MAX249 family, such as the MAX247 or MAX249, provided they offer equivalent channel counts and package configurations.