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Maxim > Products > Display Drivers and Display Power 
MAX6958, MAX6959
2-Wire Interfaced, 3V to 5.5V, 4-Digit, 9-Segment LED Display Drivers with Keyscan


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Data Sheet
FULL DATA SHEET (PDF, 684kB)
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Description
The MAX6958/MAX6959 compact multiplexed common- cathode display drivers interface microprocessors to seven-segment numeric LED digits, or discrete LEDs through an SMBus™- and I²C-compatible 2-wire serial interface. The 2-wire serial interface uses fixed 0.8V/2.1V logic thresholds for compatibility with 2.5V and 3.3V systems when the display driver is powered from a 5V supply.

The MAX6958/MAX6959 drive up to four 7-segment digits, with decimal points, plus four discrete LEDs, or four 7-segment digits and eight discrete LEDs if the digits' decimal points are not used, or up to 36 discrete LEDs. The MAX6959 also includes two input ports, one or both of which may be configured as a key-switch reader, which automatically scans and debounces a matrix of up to eight switches. Key-switch status is obtained by polling internal status registers or by configuring the MAX6959 interrupt output.

Other on-chip features include a hexadecimal font for seven-segment displays, multiplex scan circuitry, anode and cathode drivers, and static RAM that stores each digit. The peak segment current for the display digits is set internally to 23mA. Display intensity is adjusted using a 64-step internal digital brightness control. The MAX6958/MAX6959 include a low-power shutdown mode, a scan-limit register that allows the user to display from one to four digits, and a test mode, which forces all LEDs on. The LED drivers are slew-rate-limited to reduce EMI.

The MAX6958/MAX6959 are available in 16-pin PDIP and QSOP packages and are fully specified over the -40°C to +125°C automotive temperature range.

Key Features   Applications/Uses
  • 400kbps 2-Wire Serial Interface
  • 3V to 5.5V Operation
  • Drive 4 Digits plus 4 or 8 Discrete LEDs
  • Drive Common-Cathode LED Digits
  • 23mA Constant-Current LED Segment Drive
  • Hexadecimal Decode/No-Decode Digit Selection
  • 64-Step Digital Brightness Control
  • Slew-Rate-Limited Segment Drivers Reduced EMI
  • Debounces Up to Eight Switches with n-Key Rollover (MAX6959 Only)
  • IRQ Output When a Key Input Is Debounced (MAX6959 Only)
  • 20µA Low-Power Shutdown (Data Retained)
  • Automotive Temperature Range (-40°C to +125°C)
  • Compact 16-Pin PDIP and QSOP Packages

 
  		• Audio/Video Equipment
  		• Industrial Controls
  		• Panel Meters
  		• Set-Top Boxes
  		• Vending Machine
  		• White Goods

    Key Specifications:   Display Drivers
    Part Number Features LCD or LED Digits or Char. Output per Digit/Char. Display Type Interface Fonts Slew-Rate Limiting Supply Voltage (min) (V) Supply Voltage (max) (V) RoHS Available Package Smallest Available Package (max w/pins) (mm2) Operating Temp. Range (°C) Price**
    MAX6958   -  LED 4½-Digit 7 segment + 2 annunciators Common Cathode Serial 2-Wire 400kbit Hexadecimal Yes 3 5.5 Yes PDIP/16
    QSOP/16     		31 -40 to +125 $3.33 @ 1k
    MAX6959 
    •8 Key Scanning, 3 GPIO
    		 $4.40 @ 1k
    See All Display Drivers (53)
    Notes:
    **This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

    Diagram
    MAX6958, MAX6959: Typical Operating Circuit
    Typical Operating Circuit

    Application Notes
  		• Application Note 828: LED Manufacturers' Web Sites - MAX6958, MAX6959
  		• Application Note 1193: Electronic Displays Comparison - MAX6958, MAX6959
  		• Application Note 1880: Charlieplexing - Reduced Pin-Count LED Display Multiplexing - MAX6958, MAX6959
  		• Application Note 1883: LEDs Are Still Popular (and Improving) after All These Years - MAX6958, MAX6959
  		• Application Note 1928: Wiring the MAX6958/59 to 4-Digit Clock Displays - MAX6958, MAX6959
  		• Application Note 1936: Driving 4-1/2 Digit Meter Displays with the MAX6958/59 LED Drivers - MAX6958, MAX6959
  		• Application Note 1942: Driving 4-1/2 Digit Counter Displays with the MAX6958/59 LED Drivers - MAX6958, MAX6959
  		• Application Note 3461: Extending the MAX6959 LED Display-Driver Keyscan from 8-Keys to 12-Keys - MAX6958, MAX6959
  		• Application Note 3509: Individual LED Intensity Control with MAX6958/MAX6959 LED Drivers - MAX6958, MAX6959

    Evaluation Kits
    none

    Reliability Reports
  		• Show FIT data for:
  		• Request Reliability Report for:

    Software/Models
    none

    Ordering Information
    Notes:

    1. Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
    2. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
    3. Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions.
    4. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.


    Devices: 1-24 of 24

    MAX6958 Free
    Sample    		 Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX6958BAPE+  
    		PDIP;16 pin;160 mm²
    Dwg: 21-0043
    Use pkgcode/variation: P16+1*
    		-40°C to +125°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX6958AAPE  
    		PDIP;16 pin;160 mm²
    Dwg: 21-0043
    Use pkgcode/variation: P16-1*
    		-40°C to +125°C RoHS/Lead-Free: No
    Materials Analysis
    MAX6958BAPE  
    		PDIP;16 pin;160 mm²
    Dwg: 21-0043
    Use pkgcode/variation: P16-1*
    		-40°C to +125°C RoHS/Lead-Free: No
    Materials Analysis
    MAX6958AAPE+  
    		PDIP;16 pin;160 mm²
    Dwg: 21-0043
    Use pkgcode/variation: P16+1*
    		-40°C to +125°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX6958AAEE  
    		QSOP;16 pin;31 mm²
    Dwg: 21-0055G (PDF)
    Use pkgcode/variation: E16-1*
    		-40°C to +125°C RoHS/Lead-Free: No
    Materials Analysis
    MAX6958BAEE+T  



    		-40°C to +125°C See data sheet
    MAX6958BAEE+  
    		QSOP;16 pin;31 mm²
    Dwg: 21-0055G (PDF)
    Use pkgcode/variation: E16+1*
    		-40°C to +125°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX6958AAEE+T  
    		QSOP;16 pin;31 mm²
    Dwg: 21-0055G (PDF)
    Use pkgcode/variation: E16+1*
    		-40°C to +125°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX6958AAEE+  
    		QSOP;16 pin;31 mm²
    Dwg: 21-0055G (PDF)
    Use pkgcode/variation: E16+1*
    		-40°C to +125°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX6958BAEE  
    		QSOP;16 pin;31 mm²
    Dwg: 21-0055G (PDF)
    Use pkgcode/variation: E16-1*
    		-40°C to +125°C RoHS/Lead-Free: No
    Materials Analysis
    MAX6958AAEE-T  



    		-40°C to +125°C See data sheet
    MAX6958BAEE-T  



    		-40°C to +125°C See data sheet
    MAX6959 Free
    Sample    		 Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX6959AAPE+  
    		PDIP;16 pin;160 mm²
    Dwg: 21-0043
    Use pkgcode/variation: P16+1*
    		-40°C to +125°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX6959BAPE+  
    		PDIP;16 pin;160 mm²
    Dwg: 21-0043
    Use pkgcode/variation: P16+1*
    		-40°C to +125°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX6959AAPE  
    		PDIP;16 pin;160 mm²
    Dwg: 21-0043
    Use pkgcode/variation: P16-1*
    		-40°C to +125°C RoHS/Lead-Free: No
    Materials Analysis
    MAX6959BAPE  
    		PDIP;16 pin;160 mm²
    Dwg: 21-0043
    Use pkgcode/variation: P16-1*
    		-40°C to +125°C RoHS/Lead-Free: No
    Materials Analysis
    MAX6959AAEE  
    		QSOP;16 pin;31 mm²
    Dwg: 21-0055G (PDF)
    Use pkgcode/variation: E16-1*
    		-40°C to +125°C RoHS/Lead-Free: No
    Materials Analysis
    MAX6959BAEE+T  
    		QSOP;16 pin;31 mm²
    Dwg: 21-0055G (PDF)
    Use pkgcode/variation: E16+1*
    		-40°C to +125°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX6959BAEE+  
    		QSOP;16 pin;31 mm²
    Dwg: 21-0055G (PDF)
    Use pkgcode/variation: E16+1*
    		-40°C to +125°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX6959BAEE-T  
    		QSOP;16 pin;31 mm²
    Dwg: 21-0055G (PDF)
    Use pkgcode/variation: E16-1*
    		-40°C to +125°C RoHS/Lead-Free: No
    Materials Analysis
    MAX6959AAEE+T  
    		QSOP;16 pin;31 mm²
    Dwg: 21-0055G (PDF)
    Use pkgcode/variation: E16+1*
    		-40°C to +125°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX6959AAEE+  
    		QSOP;16 pin;31 mm²
    Dwg: 21-0055G (PDF)
    Use pkgcode/variation: E16+1*
    		-40°C to +125°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX6959AAEE-T  
    		QSOP;16 pin;31 mm²
    Dwg: 21-0055G (PDF)
    Use pkgcode/variation: E16-1*
    		-40°C to +125°C RoHS/Lead-Free: No
    Materials Analysis
    MAX6959BAEE  
    		QSOP;16 pin;31 mm²
    Dwg: 21-0055G (PDF)
    Use pkgcode/variation: E16-1*
    		-40°C to +125°C RoHS/Lead-Free: No
    Materials Analysis

    More Information
  		• Product Ad: Download

    Related Products
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    MAX6952 4-Wire Interfaced, 2.7V to 5.5V, 4-Digit 5 x 7 Matrix LED Display Driver
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     Description 
     Key Features 
     Applications/Uses 
     Key Specifications 
     Diagram 

    		 Data Sheet 
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     Engineering Journals 
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    Document Ref.: 19-2634; Rev 1; 2005-12-13
    This page last modified: 2008-03-13




             


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