Description

The MAX721CSE-T is a compact, serial input/output common-cathode display driver that interfaces microprocessors (µPs) to various LED displays. It can control up to 8 digits of 7-segment numeric LED displays, bar-graph displays, or 64 individual LEDs. This electronic component includes a BCD code-B decoder, multiplex scan circuitry, segment and digit drivers, and an 8x8 static RAM for storing each digit. With only one external resistor required, the MAX721CSE-T allows easy adjustment of the segment current for all LEDs. It is compatible with SPI™, QSPI™, and Microwire™ protocols, and features slew-rate limited segment drivers to reduce electromagnetic interference (EMI).

Specifications and features

• 10MHz Serial Interface
• Individual LED Segment Control
• Decode/No-Decode Digit Selection
• 150µA Low-Power Shutdown (Data Retained)
• Digital and Analog Brightness Control
• Display Blanked on Power-Up
• Drive Common-Cathode LED Display
• Slew-Rate Limited Segment Drivers for Lower EMI
• SPI, QSPI, Microwire Serial Interface
• 24-Pin DIP and SO Packages

Application Scenarios

The MAX721CSE-T is suitable for various applications including:

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

Comparison

• Compact and versatile design
• Easy interface with microprocessors
• Control of multiple types of LED displays
• Adjustable segment current for all LEDs
• Compatible with multiple serial interfaces
• Reduced electromagnetic interference (EMI)

• Only compatible with common-cathode LED displays
• Not suitable for applications requiring more than 8 digits