Datasheet > MAX6955ATL+

MAX6955ATL+

更新时间： 2024-09-14 20:38:39

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MAX6955ATL+ 数据手册

EVALUATION KIT AVAILABLE

2-Wire Interfaced, 2.7V to 5.5V

LED Display Driver with I/O

Expander and Key Scan

MAX6955

General Description

Benefits and Features

The MAX6955 is a compact display driver that interfaces

microprocessors to a mix of 7-segment, 14-segment,

and 16-segment LED displays through an I²C-compati-

ble 2-wire serial interface. The MAX6955 drives up to 16

digits 7-segment, 8 digits 14-segment, 8 digits 16-seg-

ment, or 128 discrete LEDs, while functioning from a

supply voltage as low as 2.7V. The driver includes five

I/O expander or general-purpose I/O (GPIO) lines, some

or all of which can be configured as a key-switch reader.

The key-switch reader automatically scans and

debounces a matrix of up to 32 switches.

• Simplifies Driving 5 x 7 Matrix LED Displays

• Drives Common-Cathode Monocolor and Bicolor

LED Displays

• Drives Up to 16 Digits 7-Segment, 8 Digits 14-Segment,

8 Digits 16-Segment, 128 Discrete LEDs, or a

Combination of Digit Types

• 2.7V to 5.5V Operation

• Standard 2-Wire Interface Supports a Variety of

Microprocessor Architectures

• 400kbps 2-Wire I C-Compatible Interface

• Integrated Flexibility Supports Different Application

Included on chip are full 14- and 16-segment ASCII

104-character fonts, a hexadecimal font for 7-segment

displays, multiplex scan circuitry, anode and cathode

drivers, and static RAM that stores each digit. The max-

imum segment current for the display digits is set using

a single external resistor. Digit intensity can be inde-

pendently adjusted using the 16-step internal digital

brightness control. The MAX6955 includes a low-power

shutdown mode, a scan-limit register that allows the

user to display from 1 to 16 digits, segment blinking

(synchronized across multiple drivers, if desired), and a

test mode, which forces all LEDs on. The LED drivers

are slew-rate limited to reduce EMI.

Requirements

• Built-In ASCII 104-Character Font for 14-Segment

and 16-Segment Digits and Hexadecimal Font for

7-Segment Digits

• 16-Step Digit-by-Digit Digital Brightness Control

• Display Blanked on Power-Up

• Automatic Blinking Control for Each Segment

• 10µA (typ) Low-Power Shutdown (Data Retained)

• Five GPIO Port Pins Can Be Configured as Key-Switch

Reader to Scan and Debounce Up to 32 Switches with

n-Key Rollover

• IRQ Output when a Key Input Is Debounced

• Slew-Rate-Limited Segment Drivers for Lower EMI

• 36-Pin SSOP and 40-Pin DIP and TQFN Packages

For an SPI-compatible version, refer to the MAX6954

data sheet. An evaluation kit (EV kit) for the MAX6955 is

available.

• Automotive Temperature Range Standard Covers

Usage in Harsh Environments

Applications

Functional Diagram

Set-Top Boxes

Panel Meters

White Goods

Bar Graph Displays

Audio/Video Equipment

P0 TO P4/IRQ

O0 TO O18

GPIO

AND KEY-SCAN

CONTROL

PWM

BRIGHTNESS

CONTROL

CURRENT

SOURCE

ISET

LED

DRIVERS

Ordering Information

DIGIT

MULTIPLEXER

OSC

DIVIDER/

COUNTER

NETWORK

PART

TEMP RANGE

PIN-PACKAGE

OSC_OUT

CHARACTER

GENERATOR

ROM

MAX6955AAX+

MAX6955ATL+

-40°C to +125°C

36 SSOP

MAX6955

40 TQFN-EP*

*EP = Exposed pad.

BLINK

CONTROL

BLINK

+Denotes a lead(Pb)-free/RoHS-compliant package.

CONFIGURATION

RAM

Pin Configurations and Typical Operating Circuits appear

at end of data sheet.

SCL

AD0

AD1

SDA

2-WIRE SERIAL INTERFACE

19-2548; Rev 4; 7/15

12 3 4 5 6 7...40

中文翻译

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MAX6955ATL+ 替代型号

型号	品牌	替代类型	描述	数据表
MAX6955ATL+T	MAXIM	完全替代	暂无描述
MAX6955ATL-T	MAXIM	类似代替	LED Driver, 7-Segment, CMOS, 6 X 6 MM, 0.80 MM HEIGHT, MO-220WJJD-2, TQFN-40
MAX6955ATL	MAXIM	功能相似	LED Driver, 7-Segment, CMOS, 6 X 6 MM, 0.80 MM HEIGHT, MO-220WJJD-2, TQFN-40

与MAX6955ATL+相关器件

型号	品牌	获取价格	描述	数据表
MAX6955ATL+T	MAXIM	获取价格	暂无描述
MAX6955ATL-T	MAXIM	获取价格	LED Driver, 7-Segment, CMOS, 6 X 6 MM, 0.80 MM HEIGHT, MO-220WJJD-2, TQFN-40
MAX6955EVKIT	MAXIM	获取价格	Evaluation Kit for the MAX6955
MAX6956	MAXIM	获取价格	2-Wire-Interfaced, 2.5V to 5.5V, 20-Port or 28-Port LED Display Driver and I/O Expander
MAX6956	ADI	获取价格	2线接口、2.5V至5.5V、20端口或28端口LED显示驱动器及输入/输出扩展器
MAX6956_09	MAXIM	获取价格	2-Wire-Interfaced, 2.5V to 5.5V, 20-Port or 28-Port LED Display Driver and I/O Expander
MAX6956AAI	MAXIM	获取价格	2-Wire-Interfaced, 2.5V to 5.5V, 20-Port or 28-Port LED Display Driver and I/O Expander
MAX6956AAI+	MAXIM	获取价格	Interface Circuit, CMOS, PDSO28, ROHS COMPLIANT, SSOP-28
MAX6956AAI-T	MAXIM	获取价格	Interface Circuit, CMOS, PDSO28, SSOP-28
MAX6956AAX	MAXIM	获取价格	2-Wire-Interfaced, 2.5V to 5.5V, 20-Port or 28-Port LED Display Driver and I/O Expander

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