MAX6951EEE 데이터 시트보기 (PDF) - Maxim Integrated

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MAX6951EEE

Serially Interfaced, +2.7V to +5.5V, 5- and 8-Digit LED Display Drivers

Maxim Integrated 

19-2227; Rev 2; 3/05

Serially Interfaced, +2.7V to +5.5V,

5- and 8-Digit LED Display Drivers

General Description

The MAX6950/MAX6951 are compact common-cath-

ode display drivers that interface microprocessors to

individual 7-segment numeric LED digits, bar graph, or

discrete LEDs through an SPI™-, QSPI™-MICROWIRE™-

compatible serial interface. The supply voltage can be

as low as 2.7V.

The MAX6950 drives up to five 7-segment digits or 40

discrete LEDs. The MAX6951 drives up to eight 7-seg-

ment digits or 64 discrete LEDs.

Included on-chip are hexadecimal character decoders

(0–9, A–F), multiplex scan circuitry, segment and digit

drivers, and a static RAM that stores each digit. The

user may select hexadecimal decoding or no-decode

for each digit to allow any mix of 7-segment digits, bar

graph, or discrete LEDs to be driven. The segment cur-

rent for the LEDs is set by an internal digital brightness

control. The segment drivers are slew-rate limited to

reduce EMI.

Individual digits may be addressed and updated with-

out rewriting the entire display. The devices include a

low-power shutdown mode, digital brightness control, a

scan-limit register that allows the user to display from

one to eight digits, segment blinking that can be syn-

chronized across drivers, and a test mode that forces

all LEDs on.

Applications

Set-Top Boxes

Panel Meters

White Goods

Bar Graphs and Matrix Displays

Industrial Controllers and Instrumentation

Professional Audio Equipment

Medical Equipment

Functional Diagram appears at end of data sheet.

Typical Application appears at end of data sheet.

SPI and QSPI are trademarks of Motorola, Inc.

MICROWIRE is a trademark of National Semiconductor Corp.

Features

♦ High-speed 26MHz SPI-, QSPI-, MICROWIRE-

Compatible Serial Interface

♦ +2.7V to +5.5V Operation

♦ Individual LED Segment Control

♦ Segment Blinking Control that Can Be

Synchronized Across Multiple Drivers

♦ Hexadecimal Decode/No-Decode Digit Selection

♦ Digital Brightness Control

♦ Display Blanked on Power-Up

♦ Drives Common-Cathode LED Digits

♦ Multiplex Clock Syncronizable to External Clock

♦ Slew-Rate Limited Segment Drivers for Low EMI

♦ 75µA Low-Power Shutdown (Data Retained)

♦ Small 16-Pin QSOP Package

Ordering Information

PART

MAX6950CEE

MAX6950EEE

MAX6951CEE

MAX6951EEE

*EP = Exposed pad.

TEMP RANGE

0°C to +70°C

-40°C to +85°C

0°C to +70°C

-40°C to +85°C

PIN-PACKAGE

16 QSOP-EP*

16 QSOP-EP*

16 QSOP-EP*

16 QSOP-EP*

Pin Configuration

TOP VIEW

DIN 1

CLK 2

DIG3/SEG3 3

DIG2/SEG2 4

DIG1/SEG1 5

DIG0/SEG0 6

ISET 7

GND 8

( ) MAX6951 ONLY

MAX6950

MAX6951

QSOP

16 V+

15 CS

14 DIG4/SEG4

13 (DIG5)/SEG5

12 (DIG6)/SEG6

11 (DIG7)/SEG7

10 SEG8

9 OSC

________________________________________________________________ Maxim Integrated Products 1

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.

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