MAX248EQH+D

Overview

The MAX248EQH+D is an RS-232 transceiver from the MAX220–MAX249 family, designed for EIA/TIA-232E and V.28/V.24 interfaces. It operates on a single +5V supply using integrated charge-pump circuitry to generate internal ±10V rails, eliminating the need for external bipolar supplies. The device features eight drivers and eight receivers with full-duplex communication capability. It supports data rates up to 120 kb/s and includes shutdown functionality to reduce power consumption. The component is housed in a PLCC-44 package and functions within an operating temperature range of -40°C to +85°C.

Feature Summary

• Integrated charge-pump circuitry enables single-supply operation without requiring external bipolar voltage sources.
• Provides eight independent drivers and eight receivers for high-channel-count multidrop network applications.
• Includes shutdown control inputs to minimize power requirements during idle periods.

Applications

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

Procurement Notes

Verify the specific suffix 'EQH' corresponds to the PLCC-44 package and industrial temperature grade (-40°C to +85°C) as defined in the manufacturer's ordering information table. Confirm RoHS compliance status through official documentation before integration. Ensure static-sensitive handling protocols are followed due to the moisture sensitivity classification associated with this package type.

Selection Notes

Select this component when designing systems requiring multiple serial channels within a compact footprint. The integrated charge pump simplifies board layout by removing external capacitors typically needed for voltage inversion. Verify that the required data rate does not exceed 120 kb/s under maximum load conditions. Consider the shutdown pin configuration if low-power standby modes are necessary for the application.

Part Context

This part belongs to the Maxim Integrated MAX220–MAX249 family of +5V-powered multichannel RS-232 drivers and receivers. The family offers various channel counts and package options tailored for space-constrained designs. The MAX248 specifically provides eight channels, distinguishing it from dual or quad-channel variants like the MAX232 or MAX245.

Replacement Considerations

Cross-reference with other members of the MAX220–MAX249 family such as the MAX247 or MAX249 for similar channel counts. Verify pin compatibility and control logic configurations (ENT/ENR pins) when substituting, as control schemes may vary between specific model numbers within the series.