MAX7219, MAX7221

Serially Interfaced, 8-Digit, LED Display Drivers

 Overview   Design Resources   Ordering Info   Related Products   All   

Status Explanations for product status codes

Part Number Status
MAX7219 Active: In Production. See Ordering Information for details.
MAX7221 Active: In Production. See Ordering Information for details.

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.

Data Sheet

Download this datasheet in PDF formatDownload Rev 4 (PDF, 456kB)
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Key Features

  • 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
 

Applications/Uses

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

Key Specifications:

Display Drivers
Part Number LCD or LED Digits or Char. Output Format Display Type Interface Fonts VSUPPLY
(V)
VSUPPLY
(V)
Budgetary
Price
min max See Notes
MAX7219  LED 8-Digit 7 segment + DP Common Cathode Serial 3-Wire 10Mbit Code B 4 5.5 $4.18 @1k
MAX7221  Serial SPI 10Mbit
See All Display Drivers (48)

Pricing 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 and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.



Diagram

MAX7219, MAX7221: Typical Application Circuit
Typical Application Circuit

Technical Documents

App Note 141  Data Multiplexer Adds Cursor To MAX7219 or MAX7221 LED 7 Segment Display Driver
App Note 876  Migrating from the MAX7219 and MAX7221 to the MAX6950 and MAX6951 LED Drivers
App Note 917  12-Bit Thermometer Using an 8-Bit µC and Assembler
App Note 1004  Multiplexing Shutdown Allows Text to be Displayed
App Note 1193  Electronic Displays Comparison
App Note 1196  Using the MAX7219/7221 to Drive Higher Voltage or Current
App Note 1879  Using Maxim SPI-compatible Display Drivers with other SPI Peripherals
Tutorial 1883  LEDs Are Still Popular (and Improving) after All These Years
App Note 2782  Using a PC to Experiment with the MAX7219 and MAX7221 LED Display Drivers
App Note 4505  One-Wire Network Controls Remote SPI Peripherals
App Note 4713  Eliminate Noise Through Proper Supply Bypass Filtering

Product Guides

Real-Time Clocks (PDF)

Reliability Reports

Reliability Report: MAX7219.pdf MAX7221.pdf
Show FIT data for:

Ordering Information

Filters: Part Number Package: Temperature: Tape and Reel Sample
Part Number Free
Sample
Buy Status Explanations for product status codes Package:
TYPE PINS FOOTPRINT
DRAWING  CODE/VAR *
Temp RoHS/Lead-Free?
Materials Analysis
MAX7219C/D    
Active DICE SALES;NA pin;DICE;
See data sheet
MAX7219CNG    
Limited Availability PDIP(N);24 pin;158.4 mm²
0°C to +70°C RoHS/Lead-Free: No
Materials Analysis
MAX7219CNG+  
Active PDIP(N);24 pin;158.4 mm²
0°C to +70°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX7219CWG    
Limited Availability SOIC(W);24 pin;166.1 mm²
0°C to +70°C RoHS/Lead-Free: No
Materials Analysis
MAX7219CWG+  
Active SOIC(W);24 pin;166.1 mm²
0°C to +70°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX7219CWG+T    
Active SOIC(W);24 pin;166.1 mm²
0°C to +70°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX7219CWG-T     N/A No Longer Available SOIC(W);24 pin;166.1 mm²
0°C to +70°C RoHS/Lead-Free: No
Materials Analysis
MAX7219ENG    
Limited Availability PDIP(N);24 pin;158.4 mm²
-40°C to +85°C RoHS/Lead-Free: No
Materials Analysis
MAX7219ENG+    
Active PDIP(N);24 pin;158.4 mm²
-40°C to +85°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX7219ERG     N/A No Longer Available CDIP(N);24 pin;264.3 mm²
-40°C to +85°C RoHS/Lead-Free: No
Materials Analysis
Part Number Free
Sample
Buy Status Explanations for product status codes Package:
TYPE PINS FOOTPRINT
DRAWING  CODE/VAR *
Temp RoHS/Lead-Free?
Materials Analysis
MAX7219ERG+     N/A No Longer Available CDIP;
-40°C to +85°C See data sheet
MAX7219EWG    
Limited Availability SOIC(W);24 pin;166.1 mm²
-40°C to +85°C RoHS/Lead-Free: No
Materials Analysis
MAX7219EWG+    
Active SOIC(W);24 pin;166.1 mm²
-40°C to +85°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX7219EWG+T    
Active SOIC(W);24 pin;166.1 mm²
-40°C to +85°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX7219EWG-T     N/A No Longer Available W.SO;24 pin
-40°C to +85°C See data sheet
MAX7221CNG     N/A No Longer Available PDIP(N);24 pin;158.4 mm²
0°C to +70°C RoHS/Lead-Free: No
Materials Analysis
MAX7221CNG+  
Active PDIP(N);24 pin;158.4 mm²
0°C to +70°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX7221CWG     N/A No Longer Available SOIC(W);24 pin;166.1 mm²
0°C to +70°C RoHS/Lead-Free: No
Materials Analysis
MAX7221CWG+  
Active SOIC(W);24 pin;166.1 mm²
0°C to +70°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX7221CWG+T    
Active SOIC(W);24 pin;166.1 mm²
0°C to +70°C RoHS/Lead-Free: Lead Free
Materials Analysis
Part Number Free
Sample
Buy Status Explanations for product status codes Package:
TYPE PINS FOOTPRINT
DRAWING  CODE/VAR *
Temp RoHS/Lead-Free?
Materials Analysis
MAX7221CWG-T     N/A No Longer Available W.SO;24 pin
0°C to +70°C See data sheet
MAX7221ENG     N/A No Longer Available PDIP(N);24 pin;158.4 mm²
-40°C to +85°C RoHS/Lead-Free: No
Materials Analysis
MAX7221ENG+    
Active PDIP(N);24 pin;158.4 mm²
-40°C to +85°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX7221ERG     N/A No Longer Available CDIP(N);24 pin;264.3 mm²
-40°C to +85°C RoHS/Lead-Free: No
Materials Analysis
MAX7221EWG     N/A No Longer Available SOIC(W);24 pin;166.1 mm²
-40°C to +85°C RoHS/Lead-Free: No
Materials Analysis
MAX7221EWG+    
Active SOIC(W);24 pin;166.1 mm²
-40°C to +85°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX7221EWG+T    
Active SOIC(W);24 pin;166.1 mm²
-40°C to +85°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX7221EWG-T     N/A No Longer Available W.SO;24 pin
-40°C to +85°C See data sheet

Notes:
  1. Other options and links for purchasing parts are listed at: http://www.maximintegrated.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; -D = drypack; -U/+U on DS parts = cut tape. More: See Full Data Sheet or Maxim Product 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.

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)

Similar Products by Function

MAX6950, MAX6951 Serially Interfaced, +2.7V to +5.5V, 5- and 8-Digit LED Display Drivers
MAX6952 4-Wire Interfaced, 2.7V to 5.5V, 4-Digit 5 x 7 Matrix LED Display Driver
MAX6953 2-Wire Interfaced, 2.7V to 5.5V, 4-Digit 5 x 7 Matrix LED Display Driver
MAX6954 4-Wire Interfaced, 2.7V to 5.5V LED Display Driver with I/O Expander and Key Scan
MAX6955 2-Wire Interfaced, 2.7V to 5.5V LED Display Driver with I/O Expander and Key Scan
MAX6956 2-Wire-Interfaced, 2.5V to 5.5V, 20-Port or 28-Port LED Display Driver and I/O Expander
MAX6957 4-Wire-Interfaced, 2.5V to 5.5V, 20-Port and 28-Port LED Display Driver and I/O Expander
MAX6958, MAX6959 2-Wire Interfaced, 3V to 5.5V, 4-Digit, 9-Segment LED Display Drivers with Keyscan
See All Display Drivers (48Products)

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Information Index

Document Ref.: 19-4452 Rev 4; 2003-08-29
This page last modified: 2010-08-17