Datasheet > MAX7221

MAX7221

更新时间： 2024-10-02 14:58:11

品牌	Logo	应用领域
亚德诺 - ADI		驱动显示驱动器
页数	文件大小	规格书
15页	1347K
描述
串行接口、8位、LED显示驱动器

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中文翻译

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数据手册

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MAX7221 数据手册

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MAX7219/MAX7221

Serially Interfaced, 8-Digit LED Display Drivers

General Description

Features

● 10MHz Serial Interface

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.

● 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

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.

Ordering Information

PART

TEMP RANGE PIN-PACKAGE

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.

MAX7219CNG

MAX7219CWG

MAX7219C/D

MAX7219ENG

MAX7219EWG

MAX7219ERG

0°C to +70°C

24 Narrow Plastic DIP

24 Wide SO

Dice*

-40°C to +85°C 24 Narrow Plastic DIP

-40°C to +85°C 24 Wide SO

For applications requiring 3V operation or segment blinking,

refer to the MAX6951 data sheet.

-40°C to +85°C 24 Narrow CERDIP

Applications

● Bar-Graph Displays

● Industrial Controllers

Ordering Information continued at end of data sheet.

● Panel Meters

● LED Matrix Displays

*Dice are specified at T = +25°C.

Pin Conﬁguration

Typical Application Circuit

TOP VIEW

ꢂ

DIN

DIG 0

DIG 4

GND

24 DOUT

23 SEG D

22 SEG DP

21 SEG E

+5V

9.53kΩ

V+

MAX7219

MAX7221

DIG 6

DIG 2

DIG 3

DIG 7

GND

20 SEG C

19 V+

DIG 0–DIG 7

ISET

DIN

8 DIGITS

MAX7219

MAX7221

18 ISET

MOSI

17 SEG G

16 SEG B

15 SEG F

14 SEG A

µP

I/O

LOAD (CS)

SEG A–G,

SEG DP

SCK

CLK

DIG 5 10

DIG 1 11

8 SEGMENTS

GND

LOAD (CS) 12

CLK

( ) MAX7221 ONLY

DIꢀ/Sꢁ

8-DIGIT µP DISPLAY

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

19-4452; Rev 6; 8/21

12 3 4 5 6 7...15

中文翻译

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与MAX7221相关器件

型号	品牌	获取价格	描述	数据表
MAX7221C/D	MAXIM	获取价格	Serially Interfaced, 8-Digit LED Display Drivers
MAX7221CNG	MAXIM	获取价格	Serially Interfaced, 8-Digit LED Display Drivers
MAX7221CNG+	MAXIM	获取价格	LED Driver, 7-Segment, PDIP24, 0.300 INCH, PLASTIC, MS-001, DIP-24
MAX7221CNG-T	MAXIM	获取价格	暂无描述
MAX7221CWG	MAXIM	获取价格	Serially Interfaced, 8-Digit LED Display Drivers
MAX7221CWG+	MAXIM	获取价格	LED Driver, 7-Segment, PDSO24, 0.300 INCH, MS-013, SOIC-24
MAX7221CWG+T	MAXIM	获取价格	LED Driver, 7-Segment, PDSO24, 0.300 INCH, MS-013, SOIC-24
MAX7221CWG-T	MAXIM	获取价格	LED Driver, 7-Segment, PDSO24, 0.300 INCH, MS-013, SOIC-24
MAX7221ENG	MAXIM	获取价格	Serially Interfaced, 8-Digit LED Display Drivers
MAX7221ENG+	MAXIM	获取价格	LED Driver, 7-Segment, PDIP24, 0.300 INCH, PLASTIC, MS-001, DIP-24

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