MAX7219C/D Maxim, MAX7219C/D Datasheet

MAX7219C/D

Manufacturer Part Number

MAX7219C/D

Description

Serially Interfaced / 8-Digit LED Display Drivers

Manufacturer

Maxim

Datasheet

1.MAX7219CD.pdf (16 pages)

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The MAX7219/MAX7221 are compact, serial input/out-

put common-cathode display drivers that interface

microprocessors (µPs) to 7-segment numeric LED dis-

plays of up to 8 digits, bar-graph displays, or 64 indi-

vidual 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 seg-

ment 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 3-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.

________________________Applications

19-4452; Rev 3; 7/97

SPI and QSPI are trademarks of Motorola Inc. Microwire is a trademark of National Semiconductor Corp.

For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.

For small orders, phone 408-737-7600 ext. 3468.

_______________General Description

__________________Pin Configuration

Serially Interfaced, 8-Digit LED Display Drivers

TOP VIEW

( ) MAX7221 ONLY

LOAD (CS)

DIG 0

DIG 4

DIG 6

DIG 2

DIG 3

DIG 7

DIG 5

DIG 1

GND

DIN

Bar-Graph Displays

7-Segment Displays

Industrial Controllers

Panel Meters

LED Matrix Displays

________________________________________________________________ Maxim Integrated Products

MAX7219

MAX7221

DIP/SO

DOUT

SEG D

SEG DP

SEG E

SEG C

V+

ISET

SEG G

SEG B

SEG F

SEG A

CLK

Ordering Information continued at end of data sheet.

*Dice are specified at T

____________________________Features

______________Ordering Information

________Typical Application Circuit

MAX7219CNG

MAX7219CWG

MAX7219C/D

MAX7219ENG

MAX7219EWG

MAX7219ERG

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

( ) MAX7221 ONLY

PART

MOSI

SCK

I/O

9.53k

-40°C to +85°C

TEMP. RANGE

0°C to +70°C

= +25°C.

DIN

LOAD (CS)

CLK

GND

SET

8-DIGIT P DISPLAY

MAX7219

MAX7221

GND

V+

+5V

DIG 0–DIG 7

SEG A–G,

SEG DP

24 Narrow Plastic DIP

24 Wide SO

Dice*

24 Narrow Plastic DIP

24 Wide SO

24 Narrow CERDIP

PIN-PACKAGE

8 SEGMENTS

8 DIGITS

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