LED DRVR 64Segment 3.3V/5V 16-Pin QSOP

The MAX6950/MAX6951 are compact common-cathode display drivers that interface microprocessors to individual 7-segment numeric LED digits, bar graph, or discrete LEDs through an SPI-, QSPI-, MICROWIRE-compatible serial interface. The supply voltage can be as low as 2.7V. The MAX6950 drives up to five 7-segment digits or 40 discrete LEDs. The MAX6951 drives up to eight 7-segment digits or 64 discrete LEDs. Included on-chip are hexadecimal character decoders (0-9, A-F), multiplex scan circuitry, segment and digit drivers, and a static RAM that stores each digit. The user may select hexadecimal decoding or no-decode for each digit to allow any mix of 7-segment digits, bar graph, or discrete LEDs to be driven. The segment current for the LEDs is set by an internal digital brightness control. The segment drivers are slew-rate limited to reduce EMI. Individual digits may be addressed and updated without rewriting the entire display. The devices include a low-power shutdown mode, digital brightness control, a scan-limit register that allows the user to display from one to eight digits, segment blinking that can be synchronized across drivers, and a test mode that forces all LEDs on.

• High-speed 26MHz SPI-, QSPI-, MICROWIRE-Compatible Serial Interface
• +2.7V to +5.5V Operation
• Individual LED Segment Control
• Segment Blinking Control that Can Be Synchronized Across Multiple Drivers
• Hexadecimal Decode/No-Decode Digit Selection
• Digital Brightness Control
• Display Blanked on Power-Up
• Drives Common-Cathode LED Digits
• Multiplex Clock Syncronizable to External Clock
• Slew-Rate Limited Segment Drivers for Low EMI
• 75µA Low-Power Shutdown (Data Retained)
• Small 16-Pin QSOP Package