MAX7221ENG+

Display Drivers Overview

The MAX7221ENG+ is a serially interfaced, common-cathode LED display driver manufactured by Analog Devices Inc. It interfaces microprocessors to up to eight 7-segment numeric displays, bar-graph displays, or 64 individual LEDs. The device integrates a BCD code-B decoder, multiplex scan circuitry, segment and digit drivers, and an 8x8 static RAM for digit storage. Key electrical parameters include a supply voltage range of 4V to 5.5V, maximum power dissipation of 941mW, and high-level output current of -45mA with low-level output current of 320mA. It operates within a temperature range of 0°C to +70°C and utilizes a 24-pin DIP package.

Display Drivers Feature Summary

• Slew-rate limited segment drivers designed to reduce electromagnetic interference (EMI).
• Compatible with SPI, QSPI, and Microwire serial interface protocols.
• Includes digital and analog brightness control capabilities.

Display Drivers Applications

• Bar-Graph Displays
• 7-Segment Displays
• Industrial Controllers
• Panel Meters

Display Drivers Procurement Notes

Verify the specific suffix 'ENG+' against official Analog Devices documentation to confirm pinout compatibility and package type. Ensure the component meets required environmental standards such as RoHS compliance before integration into final designs. Cross-reference datasheet revisions to confirm functional equivalence with existing inventory.

Display Drivers Selection Notes

Select this component when EMI reduction is critical due to its slew-rate limited drivers. It is suitable for applications requiring direct SPI, QSPI, or Microwire connectivity without additional logic. Consider the 24-pin DIP package constraints for PCB layout and thermal management requirements in industrial environments.

Display Drivers Part Context

This part belongs to the MAX7221 family of LED display drivers from Maxim Integrated, now part of Analog Devices. It serves as an industrial-grade enhancement over the MAX7219, offering improved noise immunity and EMI performance while maintaining functional compatibility with standard serial display driving architectures.

Display Drivers Replacement Considerations

The MAX7221CWG+ is a documented alternative in the same series, differing primarily in package type (SOIC vs. DIP). Verify pin-to-pin compatibility and thermal characteristics before substitution.