MAX6983AUG+ Datasheet MAX6983AUG+, MAX6983AUG+T | P1-P3

General Description

The MAX6983 serial-interfaced LED driver provides 16

open-drain, constant-current-sinking LED driver outputs

rated at 36V. The MAX6983 operates from a 3V to 5.5V

supply. The MAX6983 supply and the LEDs’ supply can

power up in any order. The constant-current outputs

are programmed together to up to 55mA using a single

external resistor. The MAX6983 operates with a 25Mb,

industry-standard, 4-wire serial interface.

The MAX6983 includes circuitry that automatically

detects open-circuit LEDs. Fault status is loaded into the

serial-interface shift register when LE goes high and is

automatically shifted out on DOUT when the next data

transmission is shifted in.

The MAX6983 includes a fail-safe feature for safety-

related applications, which blanks the display if the ser-

ial interface fails. If the serial interface becomes

inactive for more than 1s, all driver output latches are

automatically cleared. This turns off all LEDs connected

to the outputs. The shift register data is not disturbed.

The outputs remain off until the driver output latches are

updated with data turning them on, so recovery is auto-

matic if the transmission failure is temporary. The

watchdog function requires no software change to the

application driving the MAX6983.

The MAX6983 uses the industry-standard shift-register-

plus-latch-type serial interface. The driver accepts data

shifted into a 16-bit shift register using data input DIN

and clock input CLK. Input data appears at the output

DOUT 16 clock cycles later to allow cascading of multi-

ple MAX6983s. The latch-enable input, LE, loads the 16

bits of shift-register data into a 16-bit output latch to set

which LEDs are on and which are off. The output-

enable input, OE, gates all 16 outputs on and off, and is

fast enough to be used as a PWM input for LED intensi-

ty control.

The MAX6983 is one of a family of 12 shift-register-plus-

latch-type LED drivers. The family includes 8-port and

16-port types, with 5.5V- or 36V-rated LED outputs, with

and without open-circuit LED detection and watchdog.

All versions operate from a 3V to 5.5V supply, and are

specified over the -40°C to +125°C temperature range.

Features

♦ 25Mb Industry-Standard, 4-Wire Serial Interface

♦ 3V to 5.5V Logic Supply

♦ 16 Constant-Current LED Outputs Rated at 36V

♦ Up to 55mA Continuous Current per Output

♦ Output Current Programmed by Single Resistor

♦ 3% Current Matching Between Outputs

♦ 6% Current Matching Between ICs

♦ Watchdog Clears Display if Interface Fails

♦ Reports Open-Circuit LED Faults

♦ High-Dissipation, 24-Pin Packages

♦ -40°C to +125°C Temperature Range

MAX6983

16-Port, 36V Constant-Current LED Driver with

LED Fault Detection and Watchdog

________________________________________________________________ Maxim Integrated Products 1

V+

SET

DOUT

CLK

DIN

GND

TOP VIEW

OUT15

OUT14

OUT13

OUT12OUT3

OUT2

OUT1

OUT0

OUT11

OUT10

OUT9

OUT8OUT7

OUT6

OUT5

OUT4

MAX6983AUG

MAX6983APG

Pin Configuration

Ordering Information

19-3751; Rev 1; 11/07

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.

Typical Application Circuit and Selector Guide appear at

end of data sheet.

Applications

Variable Message Signs

Marquee Displays

Point-of-Order Signs

Traffic Signs

Gaming Features

Architectural Lighting

PART TEMP RANGE PIN- PACKAGE

PK G

C O D E

MAX6983AUG -40°C to +125°C 24 TSSOP —

MAX6983ANG -40°C to +125°C 24 Narrow PDIP —

MAX6983

16-Port, 36V Constant-Current LED Driver with

LED Fault Detection and Watchdog

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

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

OUT_ ......................................................................-0.3V to +40V

DIN, CLK, LE, OE, SE ..................................-0.3V to (V+ + 0.3V)

DOUT_ Current .................................................................±10mA

OUT_ Sink Current ..............................................................60mA

Total GND Current ............................................................960mA

Continuous Power Dissipation (T

= +70°C)

24-Pin PDIP (derate 13.3mW/°C over +70°C)............1067mW

24-Pin TSSOP (derate 12.2mW/°C over +70°C) .........975mW

Operating Temperature Range .........................-40°C to +125°C

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

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

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

ELECTRICAL CHARACTERISTICS

(Typical Operating Circuit, V+ = 3V to 5.5V, T

= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at V+ = 5V, T

= +25°C.)

(Note 1)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Operating Supply Voltage V+ 3.0 5.5 V

Output Voltage V

OUT

36 V

Standby Current

(Interface Idle, All Output Ports

High Impedance, R

SET

= 360Ω)

All logic inputs at V+ or GND, DOUT_

unloaded

5.7 8 mA

Standby Current

(Interface Running, All Output

Ports High Impedance,

SET

= 360Ω)

CLK

= 25MHz, OE = V+, DIN and LE = V+

or GND, DOUT_ unloaded

6 6.5 mA

Supply Current

(Interface Idle, All Output Ports

Active Low, R

SET

= 360Ω)

All logic inputs at V+ or GND,

DOUT_ unloaded

18 25 mA

Input High Voltage

DIN_, CLK_, LE_, OE_

0.7 x V+ V

Input Low Voltage

DIN_, CLK_, LE_, OE_

0.3 x V+ V

Hysteresis Voltage

DIN_, CLK_, LE_, OE_

∆V

0.8 V

Input Leakage Current

DIN_, CLK_, LE_, OE_

, I

-1 +1 µA

Output High-Voltage DOUT_ V

SOURCE

= 4mA

V +

- 0.5V

Output Low-Voltage V

SINK

= 4mA 0.5 V

Output Current OUT_ I

OUT

V+ = 3V - 5.5V, V

OUT

= 0.8V - 2.5V,

SET

= 360Ω

37 50 61 mA

Output Leakage Current OUT_ I

LEAK

OE = V+ 1 µA

Watchdog Timeout t

0.1 1 2.5 s

MAX6983

16-Port, 36V Constant-Current LED Driver with

LED Fault Detection and Watchdog

_______________________________________________________________________________________ 3

5V TIMING CHARACTERISTICS

(Typical Operating Circuit, V+ = 4.5V to 5.5V, T

= T

MIN

to T

MAX

, unless otherwise noted.) (Notes 1, 2)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

CLK_ Clock Period t

40 ns

CLK_ Pulse-Width High t

19 ns

CLK_ Pulse-Width Low t

19 ns

DIN_ Setup Time t

4ns

DIN_ Hold Time t

8ns

DOUT_ Propagation Delay t

12 32 ns

DOUT_ Rise and Fall Time C

DOUT

= 10pF, 20% to 80% 10 ns

LE Setup Time t

10 ns

LE Rising to OUT_ Rising Delay t

LRR

(Note 3) 100 ns

LE Rising to OUT_ Falling Delay t

LRF

(Note 3) 300 ns

CLK_ Rising to OUT_ Rising

Delay

CRR

(Note 3) 100 ns

CLK_ Rising to OUT_ Falling

Delay

CRF

(Note 3) 310 ns

OE_ Rising to OUT_ Rising Delay t

OEH

(Note 3) 100 ns

OE_ Falling to OUT_ Falling Delay t

OEL

(Note 3) 320 ns

LED Output OUT_ Turn-On Fall

Time

80% to 20%; pullup resistor = 65Ω (Note 3) 120 ns

LED Output OUT_ Turn-Off Rise

Time

20% to 80%; pullup resistor = 65Ω (Note 3) 120 ns

P1-P3 P4-P6 P7-P9 P10-P12 P13-P13

MAX6983AUG+

Mfr. #:

Buy MAX6983AUG+

Manufacturer:

Maxim Integrated

Description:

LED Display Drivers 16-Port, 36V Constant-Current LED Driver with LED Fault Detection and Watchdog

Lifecycle:

New from this manufacturer.

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MAX6983AUG+

MAX6983AUG+

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