Datasheet > MAX6954

MAX6954

更新时间： 2024-09-15 14:58:15

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
39页	1792K
描述
4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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MAX6954 数据手册

MAX6954

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

Driver with I/O Expander and Key Scan

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-/

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 dig-

its 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 driv-

ers, and static RAM that stores each digit. The maximum

segment current for the display digits is set using a single

external resistor. Digit intensity can be independently

adjusted using the 16-step internal digital brightness con-

trol. 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 mul-

tiple 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

P0 TO P4

GPIO

AND KEY-SCAN

CONTROL

Applications

● Set-Top Boxes

● Panel Meters

● White Goods

PWM

BRIGHTNESS

CONTROL

● Bar Graph Displays

● Audio/Video Equipment

CURRENT

SOURCE

ISET

O0 TO O23

LED

DRIVERS

DIGIT

MULTIPLEXER

OSC

DIVIDER/

COUNTER

NETWORK

OSC_OUT

CHARACTER

GENERATOR

ROM

Ordering Information

MAX6954

PART

TEMP RANGE

PIN-PACKAGE

BLINK

CONTROL

BLINK

MAX6954AAX

MAX6954APL

MAX6954ATL+

-40°C to +125°C

36 SSOP

-40°C to +125°C

40 PDIP

CONFIGURATION

RAM

40 TQFN-EP*

CLK

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

*EP = Exposed pad.

4-WIRE SERIAL INTERFACE

DIN

DOUT

QSPI is a trademark of Motorola, Inc.

MICROWIRE is a registered trademark of National

Semiconductor Corp.

Pin Configurations and Typical Operating Circuits appear

at end of data sheet.

19-2460; Rev 5; 7/14

12 3 4 5 6 7...39

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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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