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MAX6969AUG+ |MAX6969AUGMAXN/a145avai16-Port, 5.5V Constant-Current LED Driver
MAX6969AUG+MAIXMN/a2500avai16-Port, 5.5V Constant-Current LED Driver
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MAX6969AUG+ ,16-Port, 5.5V Constant-Current LED DriverFeaturesThe MAX6969 serial-interfaced LED driver provides 16♦ 25Mb, Industry-Standard, 4-Wire Seria ..
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MAX6969AUG+-MAX6969AWG-MAX6969AWG+
16-Port, 5.5V Constant-Current LED Driver
General Description
The MAX6969 serial-interfaced LED driver provides 16
open-drain, constant-current-sinking LED driver outputs
rated at 5.5V. The MAX6969 operates from a 3V to 5.5V
supply. The MAX6969 supply and the LEDs’ supply or
supplies can power up in any order. The constant-cur-
rent outputs are programmed together to up to 55mA
using a single external resistor. The MAX6969 operates
with a 25Mb, industry-standard, 4-wire serial interface.
The MAX6969 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 DOUT
output 16 clock cycles later to allow cascading of multi-
ple MAX6969s. 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, OE,gates all 16 outputs on and off, and is fast
enough to be used as a PWM input for LED intensity
control.
For applications requiring LED fault detection, refer to
the MAX6984*, which automatically detects open-circuit
LEDs.
For safety-related applications requiring a watchdog
timer, refer to the MAX6979, which includes a fail-safe
feature that blanks the display if the serial interface
becomes inactive for more than 1s.
The MAX6969 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
at 5V
3V to 5.5V Logic Supply16 Constant-Current LED Outputs Rated at 5.5VUp to 55mA Continuous Current per OutputOutput Current Programmed by Single Resistor3% Current Matching Between Outputs6% Current Matching Between ICsHigh-Dissipation, 24-Pin Packages-40°C to +125°C Temperature Range
MAX6969
16-Port, 5.5V Constant-Current LED Driver

SET
DOUTLE
CLK
DIN
GND
TOP VIEW
OUT15
OUT14
OUT13
OUT12OUT3
OUT2
OUT1
OUT0
OUT11
OUT10
OUT9
OUT8OUT7
OUT6
OUT5
OUT4
TSSOP/PDIP/SO

MAX6969AUG
MAX6969ANG
MAX6969AWG
Pin Configuration
Ordering Information

19-3677; Rev 3; 6/10
Typical Application Circuit and Selector Guide appear at
end of data sheet.
EVALUATION KIT
AVAILABLE
Applications

Variable Message Signs
Marquee Displays
Point-of-Order Signs
Traffic Signs
Gaming Features
Architectural Lighting
PARTTEMP RANGEPIN-PACKAGE

MAX6969AUG+-40°C to +125°C24 TSSOP
MAX6969AWG+-40°C to +125°C24 Wide SO
MAX6969ANG+-40°C to +125°C24 PDIP
+Denotes a lead(Pb)-free/RoHS-compliant package.
*Future product—contact factory for availability.
MAX6969
16-Port, 5.5V Constant-Current LED Driver
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 +6V
DIN, CLK, LE, OE, SET ................................-0.3V to (V+ + 0.3V)
DOUT Current ..................................................................±10mA
OUT_ Sink Current .............................................................60mA
Total GND Current ...........................................................480mA
Continuous Power Dissipation (TA= +70°C)
24-Pin TSSOP (derate 12.2mW/°C over +70°C)..........975mW
24-Pin PDIP (derate 13.3mW/°C over +70°C)............1067mW
24 Wide SO (derate 11.8mW/°C over +70°C)..............941mW
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
Soldering Temperature (reflow).......................................+260°C
ELECTRICAL CHARACTERISTICS

(Typical Application Circuit, V+ = 3V to 5.5V, TA= TMINto TMAX, unless otherwise noted. Typical values are at V+ = 5V, TA= +25°C.)
(Note 1)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS

Operating Supply VoltageV+3.05.5V
Output VoltageVOUT5.5V
Standby Current
(Interface Idle, All Output Ports
High Impedance, RSET = 360Ω)All logic inputs at V+ or GND, DOUT
unloaded5.78mA
Standby Current
(Interface Running, All Output
Ports High Impedance,
RSET = 360Ω)fCLK = 5MHz, OE = V+, DIN and LE = V+
or GND, DOUT unloaded68.5mA
Supply Current
(Interface Idle, All Output Ports
Active Low, RSET = 360Ω)All logic inputs at V+ or GND,
DOUT unloaded1825mA
Input High Voltage
DIN, CLK, LE, OEVIH0.7 xV
Input Low Voltage
DIN, CLK, LE, OEVIL0.3 xV
Hysteresis Voltage
DIN, CLK, LE, OEΔVI0.8V
Input Leakage Current
DIN, CLK, LE, OEIIH, IIL-1+1µA
Output High-Voltage DOUTVOHISOURCE = 4mAV + 0.5V V
Output Low VoltageVOLISINK = 4mA0.5V
Output Current OUT_IOUTV+ = 3V to 5.5V, VOUT = 0.5V to 2.5V,
RSET = 360Ω375061mA
Output Leakage Current OUT_ILEAKOE = V+, OUT_ = V+1µA
MAX6969
16-Port, 5.5V Constant-Current LED Driver
5V TIMING CHARACTERISTICS

(Typical Application Circuit, V+ = 4.5V to 5.5V, TA= TMINto TMAX, unless otherwise noted.) (Notes 1, 2)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS

CLK Clock PeriodtCP40ns
CLK Pulse-Width HightCH19ns
CLK Pulse-Width LowtCL19ns
DIN Setup TimetDS4ns
DIN Hold TimetDH8ns
DOUT Propagation DelaytDO1232ns
DOUT Rise and Fall TimetDR, tDFCDOUT = 10pF, 20% to 80%10ns
LE Pulse-Width HightLW20ns
LE Setup TimetLS10ns
LE Rising to OUT_ Rising DelaytLRR100ns
LE Rising to OUT_ Falling DelaytLRF300ns
CLK Rising to OUT_ Rising DelaytCRR100ns
CLK Rising to OUT_ Falling DelaytCRF310ns
OE Rising to OUT_ Rising DelaytOEH100ns
OE Falling to OUT_ Falling DelaytOEL320ns
LED Output OUT_ Turn-On Fall
Timetf80% to 20%, pullup resistor = 65Ω120ns
LED Output OUT_ Turn-Off Rise
Timetr20% to 80%, pullup resistor = 65Ω120ns
MAX6969
16-Port, 5.5V Constant-Current LED Driver
Typical Operating Characteristics

(TA = +25°C, unless otherwise noted.)
3.3V TIMING CHARACTERISTICS

(Typical Application Circuit, V+ = 3V to 5.5V, TA= TMINto TMAX, unless otherwise noted.) (Notes 1, 2)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS

CLK Clock PeriodtCP52ns
CLK Pulse-Width HightCH24ns
CLK Pulse-Width LowtCL24ns
DIN Setup TimetDS4ns
DIN Hold TimetDH8ns
DOUT Propagation DelaytDO1250ns
DOUT Rise and Fall TimetDR, tDFCDOUT = 10pF, 20% to 80%12ns
LE Pulse-Width HightLW20ns
LE Setup TimetLS15ns
LE Rising to OUT_ Rising DelaytLRR120ns
LE Rising to OUT_ Falling DelaytLRF310ns
CLK Rising to OUT_ Rising DelaytCRR120ns
CLK Rising to OUT_ Falling DelaytCRF330ns
OE Rising to OUT_ Rising DelaytOEH120ns
OE Falling to OUT_ Falling DelaytOEL330ns
LED Output OUT_ Turn-On Fall
Timetf80% to 20%, pullup resistor = 65Ω120ns
LED Output OUT_ Turn-Off Rise
Timetr20% to 80%, pullup resistor = 65Ω120ns
Note 1:
All parameters tested at TA= +25°C. Specifications over temperature are guaranteed by design.
Note 2:
See Figure 3.
SUPPLY CURRENT vs. SUPPLY VOLTAGE
(INTERFACE IDLE, ALL OUTPUTS OFF,
RSET = 720Ω)

MAX6969 toc01
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
TA = +125°CTA = +85°C
TA = -40°C
TA = +25°C
MAX6969 toc02
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
TA = +125°CTA = +85°C
TA = -40°C
SUPPLY CURRENT vs. SUPPLY VOLTAGE
(INTERFACE IDLE, ALL OUTPUTS
OFF, RSET = 360Ω)

TA = +25°C
MAX6969 toc03
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
SUPPLY CURRENT vs. SUPPLY VOLTAGE
(INTERFACE IDLE, ALL OUTPUTS ON, RSET = 720Ω)

TA = +125°CTA = +85°C
TA = +25°C
TA = -40°C
MAX6969
16-Port, 5.5V Constant-Current LED Driverypical Operating Characteristics (continued)

(TA = +25°C, unless otherwise noted.)
MAX6969 toc04
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
SUPPLY CURRENT vs. SUPPLY VOLTAGE
(INTERFACE IDLE, ALL OUTPUTS ON, RSET = 360Ω)

TA = +125°CTA = +85°C
TA = +25°C
TA = -40°C1.01.50.52.02.53.0
PORT OUTPUT CURRENT vs. PORT OUTPUT
VOLTAGE (RSET = 720Ω, V+ = 3.3V)

MAX6969 toc05
PORT OUTPUT VOLTAGE (V)
PORT OUTPUT CURRENT (mA)
TA = +125°C
TA = +85°C
TA = +25°C
TA = -40°C1.01.50.52.02.53.0
PORT OUTPUT CURRENT vs. PORT OUTPUT
VOLTAGE (RSET = 360Ω, V+ = 3.3V)

MAX6969 toc06
PORT OUTPUT VOLTAGE (V)
PORT OUTPUT CURRENT (mA)
TA = +125°C
TA = +85°C
TA = -40°C
TA = +25°C1.01.50.52.02.53.0
PORT OUTPUT CURRENT vs. PORT OUTPUT
VOLTAGE (RSET = 720Ω, V+ = 5.0V)

MAX6969 toc07
PORT OUTPUT VOLTAGE (V)
PORT OUTPUT CURRENT (mA)
TA = +125°C
TA = +85°C
TA = +25°C
TA = -40°C1.01.50.52.02.53.0
PORT OUTPUT CURRENT vs. PORT OUTPUT
VOLTAGE (RSET = 360Ω, V+ = 5.0V)

MAX6969 toc08
PORT OUTPUT VOLTAGE (V)
PORT OUTPUT CURRENT (mA)
TA = +125°C
TA = +85°C
TA = +25°C
TA = -40°C
PORT OUTPUT CURRENT vs. SUPPLY
VOLTAGE (RSET = 720Ω, VOUT = 2V)
MAX6969 toc09
SUPPLY VOLTAGE (V)
PORT OUTPUT CURRENT (mA)
TA = +125°CTA = +85°C
TA = +25°C
TA = -40°C
PORT OUTPUT CURRENT vs. SUPPLY
VOLTAGE (RSET = 360Ω, VOUT = 2V)
MAX6969 toc10
SUPPLY VOLTAGE (V)
PORT OUTPUT CURRENT (mA)TA = +125°C
TA = +85°C
TA = +25°CTA = -40°C60030090012001500
PORT OUTPUT CURRENT
vs. RSET RESISTANCE (V+ = 5.0V)

MAX6969 toc11
PORT OUTPUT CURRENT (mA)
MAX6969
16-Port, 5.5V Constant-Current LED Driver
Pin Description
PINNAMEFUNCTION
GNDGroundDINSerial-Data Input. Data is loaded into the internal 16-bit shift register on CLK’s rising edge.CLKSerial-Clock Input. Data is loaded into the internal 16-bit shift register on CLK’s rising edge.
4LE
Load-Enable Input. Data is loaded transparently from the internal shift register(s) to the output latch(es)
while LE is high. Data is latched into the output latch(es) on LE’s falling edge, and retained while LE is
low.
5–20OUT0–OUT15LED Driver Outputs. OUT0 to OUT15 are open-drain, constant-current-sinking outputs rated to 5.5V.OEOutput-Enable Input. High forces outputs OUT0 to OUT15 high impedance, without altering the contents
of the output latches. Low enables outputs OUT0 to OUT15 to follow the state of the output latches.DOUTSerial-Data Output. Data is clocked out of the 16-bit internal shift register to DOUT on CLK’s rising edge.SETLED Current Setting. Connect SET to GND through a resistor (RSET) to set the maximum LED current.V+Positive Supply Voltage. Bypass V+ to GND with a 0.1µF ceramic capacitor.
SERIAL-TO-PARALLEL SHIFT REGISTER
LATCHES
OUT0
OUT1
OUT2
DOUTDIN
CLK
OUT7
CONSTANT-CURRENT SINKS
OUT5
OUT6
POWER-ON
RESETV+
CURRENT
REFERENCE
GNDGNDD15D15D15
RSET
MAX6969
Figure 1. Block Diagram
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