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MAX7219, MAX7221
Serially Interfaced, 8-Digit, LED Display Drivers


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Status
Active: In Production.

Data Sheet
FULL DATA SHEET (PDF, 740kB)
Download this datasheet in PDF formatDownload   Send this datasheet to any email addressE-Mail

Description
The MAX7219/MAX7221 are compact, serial input/output common-cathode display drivers that interface microprocessors (µPs) to 7-segment numeric LED displays of up to 8 digits, bar-graph displays, or 64 individual LEDs. Included on-chip are a BCD code-B decoder, multiplex scan circuitry, segment and digit drivers, and an 8x8 static RAM that stores each digit. Only one external resistor is required to set the segment current for all LEDs. The MAX7221 is compatible with SPI™, QSPI™, and MICROWIRE™, and has slew-rate-limited segment drivers to reduce EMI.

A convenient 4-wire serial interface connects to all common µPs. Individual digits may be addressed and updated without rewriting the entire display. The MAX7219/MAX7221 also allow the user to select code-B decoding or no-decode for each digit.

The devices include a 150µA low-power shutdown mode, analog and digital brightness control, a scan-limit register that allows the user to display from 1 to 8 digits, and a test mode that forces all LEDs on.

For applications requiring 3V operation or segment blinking, refer to the MAX6951 data sheet.

Key Features   Applications/Uses
  • 10MHz Serial Interface
  • Individual LED Segment Control
  • Decode/No-Decode Digit Selection
  • 150µA Low-Power Shutdown (Data Retained)
  • Digital and Analog Brightness Control
  • Display Blanked on Power-Up
  • Drive Common-Cathode LED Display
  • Slew-Rate Limited Segment Drivers for Lower EMI (MAX7221)
  • SPI, QSPI, MICROWIRE Serial Interface (MAX7221)
  • 24-Pin DIP and SO Packages

 
  		• Bar Graph Displays
  		• Industrial Controllers
  		• LED Matrix Displays
  		• Panel Meters

    Diagram
    MAX7219, MAX7221: Typical Application Circuit
    Typical Application Circuit

    Application Notes
  		• Application Note 141: Data Multiplexer Adds Cursor To MAX7219 or MAX7221 LED 7 Segment Display Driver - MAX7219, MAX7221
  		• Application Note 828: LED Manufacturers' Web Sites - MAX7219, MAX7221
  		• Application Note 876: Migrating from the MAX7219 and MAX7221 to the MAX6950 and MAX6951 LED Drivers - MAX7219, MAX7221
  		• Application Note 917: 12-Bit Thermometer Using an 8-Bit µC and Assembler - MAX7221
  		• Application Note 1004: Multiplexing Shutdown Allows Text to be Displayed - MAX7221
  		• Application Note 1193: Electronic Displays Comparison - MAX7219, MAX7221
  		• Application Note 1196: Using the MAX7219/7221 to Drive Higher Voltage or Current - MAX7219, MAX7221
  		• Application Note 1879: Using Maxim SPI-compatible Display Drivers with other SPI Peripherals - MAX7221
  		• Application Note 1883: LEDs Are Still Popular (and Improving) after All These Years - MAX7219, MAX7221
  		• Application Note 2782: Using a PC to Experiment with the MAX7219 and MAX7221 LED Display Drivers - MAX7219, MAX7221

    Design Guides
  		• Real-Time Clocks (PDF)

    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: 1-28 of 28

    MAX7219 Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX7219ERG+    
    		Active

    Land Pattern: Not Available

    		-40°C to +85°C See data sheet
    MAX7219ERG    
    		Active CDIP(N);24 pin;256 mm²
    Outline Drawing: 21-0045 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: R24-4*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX7219C/D    
    		Active DICE SALES;NA pin;0 mm²

    Land Pattern: Not Applicable
    Use pkgcode/variation: DICE*
    		See data sheet
    MAX7219CNG    
    		Active PDIP(N);24 pin;158 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: N24-1*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX7219CNG+  
    		Active PDIP(N);24 pin;158 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: N24+1*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX7219ENG    
    		Active PDIP(N);24 pin;158 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: N24-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX7219ENG+    
    		Active PDIP(N);24 pin;158 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: N24+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX7219CWG    
    		Active SOIC(W);24 pin;166 mm²
    Outline Drawing: 21-0042 (PDF)
    Land Pattern: 90-0182 (PDF)
    Use pkgcode/variation: W24-1*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX7219CWG-T    
    		Active SOIC(W);24 pin;166 mm²
    Outline Drawing: 21-0042 (PDF)
    Land Pattern: 90-0182 (PDF)
    Use pkgcode/variation: W24-1*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX7219CWG+  
    		Active SOIC(W);24 pin;166 mm²
    Outline Drawing: 21-0042 (PDF)
    Land Pattern: 90-0182 (PDF)
    Use pkgcode/variation: W24+1*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX7219CWG+T    
    		Active SOIC(W);24 pin;166 mm²
    Outline Drawing: 21-0042 (PDF)
    Land Pattern: 90-0182 (PDF)
    Use pkgcode/variation: W24+1*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX7219EWG    
    		Active SOIC(W);24 pin;166 mm²
    Outline Drawing: 21-0042 (PDF)
    Land Pattern: 90-0182 (PDF)
    Use pkgcode/variation: W24-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX7219EWG-T    
    		Active

    Land Pattern: Not Available

    		-40°C to +85°C See data sheet
    MAX7219EWG+    
    		Active SOIC(W);24 pin;166 mm²
    Outline Drawing: 21-0042 (PDF)
    Land Pattern: 90-0182 (PDF)
    Use pkgcode/variation: W24+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX7219EWG+T    
    		Active SOIC(W);24 pin;166 mm²
    Outline Drawing: 21-0042 (PDF)
    Land Pattern: 90-0182 (PDF)
    Use pkgcode/variation: W24+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX7221 Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX7221ERG    
    		Active CDIP(N);24 pin;256 mm²
    Outline Drawing: 21-0045 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: R24-4*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX7221ENG+    
    		Active PDIP(N);24 pin;158 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: N24+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX7221CNG    
    		Active PDIP(N);24 pin;158 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: N24-1*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX7221CNG+  
    		Active PDIP(N);24 pin;158 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: N24+1*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX7221ENG    
    		Active PDIP(N);24 pin;158 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: N24-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX7221CWG    
    		Active SOIC(W);24 pin;166 mm²
    Outline Drawing: 21-0042 (PDF)
    Land Pattern: 90-0182 (PDF)
    Use pkgcode/variation: W24-1*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX7221CWG-T    
    		Active

    Land Pattern: Not Available

    		0°C to +70°C See data sheet
    MAX7221CWG+  
    		Active SOIC(W);24 pin;166 mm²
    Outline Drawing: 21-0042 (PDF)
    Land Pattern: 90-0182 (PDF)
    Use pkgcode/variation: W24+1*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX7221CWG+T    
    		Active SOIC(W);24 pin;166 mm²
    Outline Drawing: 21-0042 (PDF)
    Land Pattern: 90-0182 (PDF)
    Use pkgcode/variation: W24+1*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX7221EWG    
    		Active SOIC(W);24 pin;166 mm²
    Outline Drawing: 21-0042 (PDF)
    Land Pattern: 90-0182 (PDF)
    Use pkgcode/variation: W24-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX7221EWG-T    
    		Active

    Land Pattern: Not Available

    		-40°C to +85°C See data sheet
    MAX7221EWG+    
    		Active SOIC(W);24 pin;166 mm²
    Outline Drawing: 21-0042 (PDF)
    Land Pattern: 90-0182 (PDF)
    Use pkgcode/variation: W24+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX7221EWG+T    
    		Active SOIC(W);24 pin;166 mm²
    Outline Drawing: 21-0042 (PDF)
    Land Pattern: 90-0182 (PDF)
    Use pkgcode/variation: W24+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis

    Notes and Comments
  		• True 3-wire serial interface, easy to use (MAX7219)
  		• Slew-rate limited segment drivers for lower EMI, SPI, QSPI, MICROWIRE serial interface (MAX7221)

    More Information
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    Document Ref.: 19-4452; Rev 4; 2003-08-29
    This page last modified: 2009-10-05


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