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

Product Details

Key Features

Parametric specs for Display Drivers
LCD or LED LED
Display Type Common Cathode
Interface Serial SPI 26Mbit
Digits or Char. 8-Digit
Output Format 7 segment + DP
Fonts Hexadecimal
Segment Blinking Yes
VSUPPLY (V) (min) 2.7
VSUPPLY (V) (max) 5.5
Package/Pins QSOP/16
Budgetary
Price (See Notes)
6.4
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Simplified Block Diagram

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Parameters

Parametric specs for Display Drivers
LCD or LED LED
Display Type Common Cathode
Interface Serial SPI 26Mbit
Digits or Char. 8-Digit
Output Format 7 segment + DP
Fonts Hexadecimal
Segment Blinking Yes
VSUPPLY (V) (min) 2.7
VSUPPLY (V) (max) 5.5
Package/Pins QSOP/16
Budgetary
Price (See Notes)
6.4

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

Applications/Uses

  • Bar Graphs and Matrix Displays
  • Industrial Controllers and Instrumentation
  • Medical Equipment
  • Panel Meters
  • Professional Audio Equipment
  • Set-Top Boxes
  • White Goods

Description

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.

Simplified Block Diagram

MAX6950, MAX6951: Typical Application Circuit MAX6950, MAX6951: Typical Application Circuit Zoom icon

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .