MAX7219CWG

Display Drivers Overview

The MAX7219CWG is a compact, serial input/output common-cathode display driver manufactured by Analog Devices Inc./Maxim Integrated. It interfaces microprocessors to 7-segment numeric LED displays of up to 8 digits, 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, a maximum supply current of 330 mA, and a power dissipation of 941 mW. It operates within a temperature range of 0°C to +70°C and is housed in a 24-PDIP package.

Display Drivers Feature Summary

• Serial interface compatibility with SPI, QSPI, and Microwire protocols
• Integrated BCD decoder and multiplex scan circuitry
• On-chip 8x8 static RAM for digit storage
• Single external resistor sets segment current

Display Drivers Applications

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

Display Drivers Procurement Notes

Verify the specific suffix 'CWG' corresponds to the 24-PDIP package and commercial temperature grade (0°C to +70°C) required for your design. Confirm RoHS compliance status through official manufacturer documentation before procurement. Ensure the ordering part number matches the exact pinout and thermal characteristics specified in the datasheet to avoid integration errors.

Display Drivers Selection Notes

Select this component when interfacing microprocessors with common-cathode LED displays requiring serial control. It is suitable for applications needing integrated decoding and multiplexing without external logic. Consider the MAX7221 variant if slew-rate limited drivers are needed to reduce EMI, as the MAX7219 lacks this specific feature. Verify that the 4V to 5.5V supply range aligns with the system power architecture.

Display Drivers Part Context

The MAX7219 is part of a family of serially interfaced LED display drivers from Maxim Integrated, now under Analog Devices. It serves as a standard solution for driving multiple LED segments efficiently. The CWG suffix denotes the plastic DIP package variant, distinguishing it from SOIC or TSSOP options. This component simplifies hardware design by consolidating display drive functions into a single IC.

Display Drivers Replacement Considerations

Public confirmed substitute part numbers: MAX7219CNG, MAX7219EWG.