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MAX6950：Serially Interfaced, +2.7V to +5.5V, 5- and 8-Digit LED Display Drivers

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.

Key Features 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

MAX6950, MAX6951: Typical Application Circuit Applications/Uses Bar Graphs and Matrix Displays Industrial Controllers and Instrumentation Medical Equipment Panel Meters Professional Audio Equipment Set-Top Boxes White Goods

DataSheet

Parametrics

Design kits & evaluation modules

• MAX6951EVKIT

Quality and Environmental Data

• MAX6950.pdf

Related Products

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• MAX6956：2-Wire-Interfaced, 2.5V to 5.5V, 20-Port or 28-Port LED Display Driver and I/O Expander
• MAX6954：4-Wire Interfaced, 2.7V to 5.5V LED Display Driver with I/O Expander and Key Scan
• MAX6952：4-Wire Interfaced, 2.7V to 5.5V, 4-Digit 5 x 7 Matrix LED Display Driver
• MAX6957：4-Wire-Interfaced, 2.5V to 5.5V, 20-Port and 28-Port LED Display Driver and I/O Expander
• MAX6953：2-Wire Interfaced, 2.7V to 5.5V, 4-Digit 5 x 7 Matrix LED Display Driver
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