MAX6954

更新时间： 2024-09-13 22:55:15

品牌	Logo	应用领域
美信 - MAXIM		显示驱动器
页数	文件大小	规格书
38页	395K
描述
4-Wire Interfaced, 2.7V to 5.5V LED Display Driver with I/O Expander and Key Scan

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数据手册

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MAX6954 数据手册

19-2460; Rev 1; 10/02

4 -Wire In t e rfa c e d , 2 .7 V t o 5 .5 V LED Dis p la y

Drive r w it h I/O Ex p a n d e r a n d Ke y S c a n

Ge n e ra l De s c rip t io n

Fe a t u re s

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-s e g me nt, 8 d ig its 16-s e g me nt, or 128 d is c re te

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 or which may be configured as a key-

s witc h re a d e r, whic h a utoma tic a lly s c a ns a nd

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 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.

Fu n c t io n a l Dia g ra m

*Future product—contact factory for availability.

Ap p lic a t io n s

P0 TO P4

GPIO

AND KEY-SCAN

CONTROL

Set-Top Boxes

Panel Meters

White Goods

Automotive

Bar Graph Displays

Audio/Video Equipment

PWM

BRIGHTNESS

CONTROL

CURRENT

SOURCE

ISET

O0 TO O23

LED

DRIVERS

DIGIT

MULTIPLEXER

OSC

Ord e rin g In fo rm a t io n

DIVIDER/

COUNTER

NETWORK

OSC_OUT

PART

TEMP RANGE

-40°C to +125°C

PIN-PACKAGE

36 SSOP

CHARACTER

GENERATOR

ROM

MAX6954AAX

MAX6954APL

MAX6954

40 PDIP

BLINK

CONTROL

BLINK

Pin Configurations and Typical Operating Circuits appear

at end of data sheet.

CONFIGURATION

RAM

SPI and QSPI are trademarks of Motorola, Inc.

MICROWIRE is a trademark of National Semiconductor Corp.

CLK

4-WIRE SERIAL INTERFACE

DIN

DOUT

________________________________________________________________ Maxim Integrated Products

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

12 3 4 5 6 7...38

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与MAX6954相关器件

型号	品牌	获取价格	描述	数据表
MAX6954_09	MAXIM	获取价格	4-Wire Interfaced, 2.7V to 5.5V LED Display Driver with I/O Expander and Key Scan
MAX6954AAX	MAXIM	获取价格	4-Wire Interfaced, 2.7V to 5.5V LED Display Driver with I/O Expander and Key Scan
MAX6954AAX+	MAXIM	获取价格	LED Driver, 24-Segment, CMOS, PDSO36, SSOP-36
MAX6954AAX-T	MAXIM	获取价格	LED Driver, 24-Segment, CMOS, PDSO36, SSOP-36
MAX6954APL	MAXIM	获取价格	4-Wire Interfaced, 2.7V to 5.5V LED Display Driver with I/O Expander and Key Scan
MAX6954ATL	MAXIM	获取价格	LED Driver, 24-Segment, CMOS, 6 X 6 MM, 0.80 MM HEIGHT, MO-220WJJD-2, TQFN-40
MAX6954ATL+	MAXIM	获取价格	4-Wire Interfaced, 2.7V to 5.5V LED Display Driver with I/O Expander and Key Scan
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

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