Overview
Features and Benefits
- 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
Product Details
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.
Applications
- Bar Graphs and Matrix Displays
- Industrial Controllers and Instrumentation
- Medical Equipment
- Panel Meters
- Professional Audio Equipment
- Set-Top Boxes
- White Goods
Product Categories
Product Lifecycle
Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Documentation & Resources
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MAX6951 Reliability Data1/12/2023PDF31K
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LEDs Are Still Popular (and Improving) after All These Years2/25/2003
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Using Analog Devices SPI-compatible Display Drivers with other SPI Peripherals2/10/2003
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Using the MAX6950 and the MAX6951 LED Display Drivers with Multiplex Dual-Digit Displays7/17/2002
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Migrating from the MAX7219 and MAX7221 to the MAX6950 and MAX6951 LED Drivers7/17/2002
Design Resources
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
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