MAX248EQH+TD

Overview

The MAX248EQH+TD is a +5V-powered, multichannel RS-232 driver and receiver manufactured by Analog Devices Inc./Maxim Integrated. It operates within an extended temperature range of -40°C to +85°C and utilizes a 44-pin PLCC package. The device features eight drivers and eight receivers supporting full-duplex communication with a data rate up to 120 kb/s. It functions on a single +5V supply, drawing 30 mA during operation. The component includes shutdown functionality for power reduction but lacks integrated ESD protection.

Feature Summary

• Integrates dual charge-pump circuits to generate internal ±10V rails from a single +5V supply, eliminating the need for external bipolar voltage sources.
• Provides eight independent RS-232 drivers and receivers for high-density serial communication interfaces.
• Includes a dedicated shutdown control input to minimize power consumption in standby states.

Applications

• Multidrop RS-232 networks
• Portable diagnostics equipment
• Interface translation between TTL/CMOS logic and RS-232 standards

Procurement Notes

Verify that the specific ordering suffix '+TD' corresponds to the intended tube packaging configuration as defined in the manufacturer's official selection guide. Confirm that the PLCC-44 footprint matches the target PCB design constraints. Ensure the component meets RoHS compliance requirements for the specific manufacturing batch.

Selection Notes

Select this component when designing systems requiring multiple RS-232 channels without access to negative voltage supplies. Consider the 44-pin PLCC package dimensions for layout planning. Evaluate the absence of built-in ESD protection against system-level electrostatic discharge requirements and determine if external protection circuitry is necessary.

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 communications. The family offers various channel counts and packages to address different board space and interface density requirements.

Replacement Considerations

Cross-reference with other members of the MAX220–MAX249 family, such as the MAX247 or MAX249, if pinout compatibility or channel count adjustments are required. Verify that alternative devices support the same +5V single-supply architecture and PLCC-44 package.

FAQ

Does the MAX248EQH+TD include integrated ESD protection?

No, the datasheet specifies that this device does not include integrated ESD protection.

What is the maximum data rate supported by the MAX248?

The device supports a maximum data rate of 120 kb/s.

How does the device handle power consumption during idle periods?

The device features a shutdown mode that significantly reduces power requirements compared to normal operation.