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MAX6954ATL+

更新时间： 2024-09-14 11:15:03

品牌	Logo	应用领域
美信 - MAXIM		显示驱动器
页数	文件大小	规格书
39页	335K
描述
4-Wire Interfaced, 2.7V to 5.5V LED Display Driver with I/O Expander and Key Scan

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替代型号

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MAX6954ATL+ 数据手册

19-2460; Rev 4; 3/09

4-Wire Interfaced, 2.7V to 5.5V LED Display

Driver with I/O Expander and Key Scan

MAX6954

General Description

Features

The MAX6954 is a compact display driver that inter-

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

ment, and 16-segment LED displays through an SPI™-

or QSPI™-compatible 4-wire serial interface. The serial

interface may be cascaded through multiple devices.

The MAX6954 drives up to 16 digits 7-segment, 8 digits

14-segment, 8 digits 16-segment, or 128 discrete

LEDs, while functioning from a supply voltage as low as

2.7V. The driver includes five I/O expander (or GPIO)

lines, some or all of which may be configured as a key-

switch reader, which automatically scans and

debounces a matrix of up to 32 switches.

♦ High-Speed 26MHz SPI/QSPI/MICROWIRE™-

Compatible Serial Interface

♦ 2.7V to 5.5V Operation

♦ Drives Up to 16 Digits 7-Segment, 8 Digits

14-Segment, 8 Digits 16-Segment, 128 Discrete

LEDs, or a Combination of Digit Types

♦ Drives Common-Cathode Monocolor and Bicolor

LED Displays

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

and 16-Segment Digits and Hexadecimal Font for

7-Segment Digits

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 MAX6954 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.

♦ Automatic Blinking Control for each Segment

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

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

♦ Display Blanked on Power-Up

♦ Slew-Rate Limited Segment Drivers for Lower EMI

♦ 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

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

♦ Automotive Temperature Range Standard

For a 2-wire interfaced version, refer to the MAX6955

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

available.

Functional Diagram

Applications

Set-Top Boxes

Panel Meters

White Goods

Automotive

P0 TO P4

GPIO

AND KEY-SCAN

CONTROL

Bar Graph Displays

Audio/Video Equipment

PWM

BRIGHTNESS

CONTROL

CURRENT

SOURCE

ISET

O0 TO O23

LED

DRIVERS

DIGIT

MULTIPLEXER

Ordering Information

OSC

DIVIDER/

COUNTER

NETWORK

OSC_OUT

PART

TEMP RANGE

-40°C to +125°C

PIN-PACKAGE

36 SSOP

CHARACTER

GENERATOR

ROM

MAX6954AAX

MAX6954APL

MAX6954ATL+

MAX6954

40 PDIP

40 TQFN-EP*

BLINK

CONTROL

BLINK

+Denotes a lead-free/RoHS-compliant package.

*EP = Exposed pad.

Pin Configurations and Typical Operating Circuits appear

at end of data sheet.

CONFIGURATION

RAM

CLK

DIN

4-WIRE SERIAL INTERFACE

SPI and QSPI are trademarks of Motorola, Inc.

DOUT

MICROWIRE is a trademark of National Semiconductor Corp.

________________________________________________________________ Maxim Integrated Products

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

12 3 4 5 6 7...39

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MAX6954ATL+ 替代型号

型号	品牌	替代类型	描述	数据表
MAX6954ATL+T	MAXIM	类似代替	LED Driver, 24-Segment, CMOS, 6 X 6 MM, 0.80 MM HEIGHT, ROHS COMPLIANT, MO-220WJJD-2, TQFN
MAX6954ATL	MAXIM	类似代替	LED Driver, 24-Segment, CMOS, 6 X 6 MM, 0.80 MM HEIGHT, MO-220WJJD-2, TQFN-40

与MAX6954ATL+相关器件

型号	品牌	获取价格	描述	数据表
MAX6954ATL+T	MAXIM	获取价格	LED Driver, 24-Segment, CMOS, 6 X 6 MM, 0.80 MM HEIGHT, ROHS COMPLIANT, MO-220WJJD-2, TQFN
MAX6955	MAXIM	获取价格	2-Wire Interfaced, 2.7V to 5.5V LED Display Driver with I/O Expander and Key Scan
MAX6955	ADI	获取价格	2线接口、2.7V至5.5V LED显示驱动器，带有输入/输出扩展器及键扫描
MAX6955AAX	MAXIM	获取价格	2-Wire Interfaced, 2.7V to 5.5V LED Display Driver with I/O Expander and Key Scan
MAX6955AAX+	MAXIM	获取价格	LED Driver, 7-Segment, CMOS, PDSO36, 0.80 MM PITCH, SSOP-36
MAX6955APL	MAXIM	获取价格	2-Wire Interfaced, 2.7V to 5.5V LED Display Driver with I/O Expander and Key Scan
MAX6955APL+	MAXIM	获取价格	LED Driver, 7-Segment, CMOS, PDIP40, ROHS COMPLIANT, PLASTIC, DIP-40
MAX6955ATL	MAXIM	获取价格	LED Driver, 7-Segment, CMOS, 6 X 6 MM, 0.80 MM HEIGHT, MO-220WJJD-2, TQFN-40
MAX6955ATL+	MAXIM	获取价格	暂无描述
MAX6955ATL+T	MAXIM	获取价格	暂无描述

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