MAX6952EAX+ Datasheet MAX6952EAX+, MAX6952EPL+, MAX6952EAX+T | P1-P3

MAX6952

4-Wire Interfaced, 2.7V to 5.5V,

4-Digit 5

7 Matrix LED Display Driver

________________________________________________________________ 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.

General Description

The MAX6952 is a compact cathode-row display driver

that interfaces microprocessors to 5

7 dot-matrix LED

displays through an SPI™-compatible serial interface.

The MAX6952 drives up to four digits (140 LEDs).

Included on chip are an ASCII 104-character font, mul-

tiplex scan circuitry, column and row drivers, and static

RAM that stores each digit, as well as font data for 24

user-definable characters. The segment current for the

LEDs is set by an internal digit-by-digit digital bright-

ness control.

The device includes a low-power shutdown mode, seg-

ment blinking (synchronized across multiple drivers, if

desired), and a test mode that forces all LEDs on. The

LED drivers are slew rate limited to reduce EMI.

For a 2-wire interfaced version, refer to the MAX6953

data sheet. An EV kit is available for the MAX6952.

Features

♦ High-Speed 26MHz with SPI-/QSPI-™/

MICROWIRE™-Compatible Serial Interface

♦ 2.7V to 5.5V Operation

♦ Drives Four Monocolor or Two Bicolor Cathode-

Row 5

7 Matrix Displays

♦ Built-In ASCII 104-Character Font

♦ 24 User-Definable Characters Available

♦ Automatic Blinking Control for Each Segment

♦ 36µA Low-Power Shutdown (Data Retained)

♦ 16-Step Digital Brightness Control

♦ Display Blanked on Power-Up

♦ Slew-Rate-Limited Segment Drivers for Lower EMI

♦ 36-Pin SSOP and 40-Pin DIP Packages

Ordering Information

DIGIT 1

DIGIT 0

O14

O15

O16

O17

O18

O19

O20

O21

O22

O23

O10

O11

O12

O13

O14

O15

O16

O17

O18

DIGIT 3

O10

O11

O12

O13

O19

O20

O21

O22

O23

DIGIT 2

3.3V

100nF

47µF

O10

O11

O12

O13

O14

O15

O16

O17

O18

O19

O20

O21

O22

O23

ISET

OSC

V+

GND

DIN

CLK

DOUT

SET

26pF

SET

53.6kΩ

MAX6952

BLINK

3.3V

4.7kΩ

Typical Application Circuit

19-2437; Rev 1; 10/02

EVALUATION KIT

AVAILABLE

PART TEMP RANGE PIN-PACKAGE

MAX6952EAX -40°C to +85°C 36 SSOP

MAX6952EPL -40°C to +85°C 40 PDIP

SPI and QSPI are trademarks of Motorola, Inc.

MICROWIRE is a trademark of National Semiconductor Corp.

Pin Configurations appear at end of data sheet.

Message Boards

Medical Equipment

Industrial Displays

Audio/Video

Equipment

Gaming Machines

Applications

MAX6952

4-Wire Interfaced, 2.7V to 5.5V,

4-Digit 5

7 Matrix LED Display Driver

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

DC ELECTRICAL CHARACTERISTICS

(Typical operating circuit, V+ = 3.0V to 5.5V, T

= T

MIN

to T

MAX

, unless otherwise noted.) (Note 1)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional

operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to

absolute maximum rating conditions for extended periods may affect device reliability.

Voltage (with respect to GND)

V+ .............................................................................-0.3V to +6V

All Other Pins................................................-0.3V to (V+ + 0.3V)

O0–O13 Sink Current ....................................................... 500mA

O14–O23 Source Current .................................................. 50mA

Continuous Power Dissipation (T

= +70°C)

36-Pin SSOP (derate 11.8mW/°C above +70°C) .....941.2mW

40-Pin PDIP (derate 16.7mW/°C above +70°C)........1333mW

Operating Temperature Range (T

MIN

, T

MAX

)......-40°C to +85°C

Junction Temperature......................................................+150°C

Storage Temperature Range .............................-65°C to +150°C

Lead Temperature (soldering, 10s) .................................+300°C

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Operating Supply Voltage V+ 2.7 5.5 V

= T

MIN

to T

MAX

100 µA

Shutdown Supply Current I

SHDN

Shutdown mode, all

digital inputs at V+ or

GND

= +25°C3680

Operating Supply Current I+

All segments on, intensity set to full,

internal oscillator, DOUT open circuit, no

display load connected, blink open circuit

12 16 mA

Master Clock Frequency (OSC

Internal Oscillator)

OSC

OSC = RC oscillator, R

SET

= 53.6kΩ,

SET

= 26pF

4 MHz

Master Clock Frequency (OSC

External Oscillator)

OSC

OSC overdriven externally 1 8 MHz

Dead Clock Protection

Frequency

OSC

90 kHz

OSC Internal/External Detection

Threshold

OSC

1.7 V

OSC High Time t

50 ns

OSC Low Time t

50 ns

Slow Segment Blink Period

(OSC Internal Oscillator)

S L OWB L I N K

OSC = RC oscillator, R

SET

= 53.6kΩ,

SET

= 26pF

Fast Segment Blink Period

(OSC Internal Oscillator)

F A S T B L I N K

OSC = RC oscillator, R

SET

= 53.6kΩ,

SET

= 26pF

0.5 s

Fast or Slow Segment Duty

Cycle

(Note 2) 49.5 50.5 %

Column Drive Source Current I

COLUMN

LED

= 2.4V, V+ = 3.0V, T

= +25°C -32 -48 mA

Segment Current Slew Rate ∆I

SEG

/∆tT

= +25

C 12.5 mA/µs

Segment Drive Current

Matching (Within IC)

∆I

SEG

= +25

C4%

MAX6952

4-Wire Interfaced, 2.7V to 5.5V,

4-Digit 5

7 Matrix LED Display Driver

_______________________________________________________________________________________ 3

DC ELECTRICAL CHARACTERISTICS (continued)

(Typical operating circuit, V+ = 3.0V to 5.5V, T

= T

MIN

to T

MAX

, unless otherwise noted.) (Note 1)

Note 1: All parameters tested at T

= +25°C. Specifications over temperature are guaranteed by design.

Note 2: Guaranteed by design.

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

LOGIC INPUTS AND OUTPUTS

Input High Voltage

DIN, CLK, CS

2.4 V

Input Low Voltage

DIN, CLK, CS

0.4 V

Input Leakage

DIN, CLK, CS, OSC

, I

-2 +0.1 +2 µA

DOUT Output Low Voltage V

OLDO

SINK

= 1.6mA 0.4 V

DOUT Output High Voltage V

OHDO

SOURCE

= 1.6mA

V+

- 0.4V

Blink Output Low Voltage V

OLBK

SINK

= 1.6mA 0.4 V

TIMING CHARACTERISTICS

(Figure 1)

CLK Clock Period t

38.4 ns

CLK Pulse Width High t

19 ns

CLK Pulse Width Low t

19 ns

CS Fall to CLK Rise Setup Time t

CSS

9.5 ns

CLK Rise to CS Rise Hold Time t

CSH

5ns

DIN Setup Time t

9.5 ns

DIN Hold Time t

0ns

CS Pulse High t

CSW

19 ns

DOUT Propagation Delay t

LOAD

= 10pF 19 ns

P1-P3 P4-P6 P7-P9 P10-P12 P13-P15 P16-P18 P19-P21

MAX6952EAX+

Mfr. #:

Buy MAX6952EAX+

Manufacturer:

Maxim Integrated

Description:

LED Display Drivers 2.7-5.5V 4-Digit 5x7 Matrix LED Driver

Lifecycle:

New from this manufacturer.

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MAX6952EAX+

MAX6952EAX+

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