MAX6950 Datasheet | Maxim Integrated

Description The MAX6950/MAX6951 are pact mon-cathode display drivers that interface microprocessors to individual 7-segment numeric LED digits, bar graph, or discrete LEDs through an SPI™-, QSPI™-, MICROWIRE™-patible 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 Set-Top Boxes Panel Meters White Goods Bar Graphs and Matrix Displays Industrial Controllers and Instrumentation Professional Audio Equipment Medical Equipment Functional Diagram appears at end of data sheet. Typical Application appears at end of data sheet. SPI and QSPI are trademarks of Motorola, Inc. MICROWIRE is a trademark of National Semiconductor Corp. Features - High-speed 26MHz SPI-, QSPI-, MICROWIREpatible 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 mon-Cathode LED Digits - Multiplex Clock Syncronizable to External Clock - Slew-Rate Limited...