19-3058; Rev 3; 3/05
KIT
ATION
EVALU
BLE
AVAILA
9-Output LED Driver with Intensity Control
and Hot-Insertion Protection
General Description
The MAX6965 I
2
C-compatible serial interfaced periph-
eral provides microprocessors with nine additional out-
put ports. Each output is an open-drain current-sinking
output rated to 50mA at 7V. All outputs are capable of
driving LEDs, or providing logic outputs with external
resistive pullup up to 7V.
Eight-bit PWM current control is also integrated. Four of
the bits are global control and apply to all LED outputs
to provide coarse adjustment of current from fully off to
fully on with 14 intensity steps. Additionally each output
then has an individual 4-bit control, which further
divides the globally set current into 16 more steps.
Alternatively, the current control can be configured as a
single 8-bit control that sets all outputs at once.
Each output has independent blink timing with two blink
phases. LEDs can be individually set to be either on or off
during either blink phase, or to ignore the blink control.
The blink period is controlled by an external clock (up to
1kHz) on BLINK or by a register. The BLINK input can also
be used as a logic control to turn the LEDs on and off, or
as a general-purpose input (GPI).
The MAX6965 supports hot insertion. The SDA, SCL,
RST,
BLINK, and the slave address input AD0 remain
high impedance in power-down (V+ = 0V) with up to 6V
asserted upon them. The output ports remain high
impedance with up to 8V asserted upon them.
The MAX6965 is controlled through a 2-wire I
2
C serial
interface, and can be configured to one of four I
2
C
addresses.
Features
♦
400kbps, 2-Wire Serial Interface, 5.5V Tolerant
♦
2V to 3.6V Operation
♦
Overall 8-Bit PWM LED Intensity Control
Global 16-Step Intensity Control
Plus Individual 16-Step Intensity Controls
♦
Two-Phase LED Blinking
♦
High Port Output Current—Each Port 50mA (max)
♦
RST
Input Clears Serial Interface and Restores
Power-Up Default State
♦
Supports Hot Insertion
♦
Outputs are 7V-Rated Open Drain
♦
Low Standby Current (1.2µA (typ), 3.3µA (max))
♦
Tiny 3mm x 3mm, Thin QFN Package
♦
-40°C to +125°C Temperature Range
MAX6965
Ordering Information
PART
TEMP
RANGE
-40°C to
+125°C
-40°C to
PIN-
PACKAGE
16 Thin QFN
3mm x 3mm
x 0.8mm
16 QSOP
TOP
MARK
AAW
—
PKG
CODE
T1633-4
—
MAX6965ATE
MAX6965AEE
Typical Application Circuit
3.3V
0.047µF
7V
Applications
LCD Backlights
LED Status Indication
Keypad Backlights
RGB LED Drivers
µC
SDA
SCL
I/O
V+
MAX6965
SDA
SCL
BLINK
RST
O0
O1
O2
O3
O4
O5
AD0
O6
O7
O8
GND
6V
RELAY
RELAY
RELAY
Pin Configurations appear at end of data sheet.
P.,
oa
li-
ne
I
2
Cs.
I/O
________________________________________________________________
Maxim Integrated Products
1
For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
9-Output LED Driver with Intensity Control
and Hot-Insertion Protection
MAX6965
ABSOLUTE MAXIMUM RATINGS
Voltage (with respect to GND)
V+ .............................................................................-0.3V to +4V
SCL, SDA, AD0, BLINK,
RST
...................................-0.3V to +6V
O0–O8 ......................................................................-0.3V to +8V
DC Current on O0 to O8 .....................................................55mA
DC Current on SDA.............................................................10mA
Maximum GND Current ....................................................190mA
Continuous Power Dissipation (T
A
= +70°C)
16-Pin QSOP (derate 8.3mW/°C over +70°C)..............666mW
16-Pin QFN (derate 14.7mW/°C over +70°C) ............1176mW
Operating Temperature Range (T
MIN
to T
MAX
) ...-40°C to +125°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
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.
ELECTRICAL CHARACTERISTICS
(Typical Operating Circuit, V+ = 2V to 3.6V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at V+ = 3.3V, T
A
= +25°C.)
(Note 1)
PARAMETER
Operating Supply Voltage
Output Load External Supply
Voltage
Standby Current
(Interface Idle, PWM Disabled)
SYMBOL
V+
V
EXT
SCL and SDA at V+; other
digital inputs at V+ or GND;
PWM intensity control disabled
SCL and SDA at V+; other
digital inputs at V+ or GND;
PWM intensity control enabled
f
SCL
= 400kHz; other digital
inputs at V+ or GND; PWM
intensity control disabled
f
SCL
= 400kHz; other digital
inputs at V+ or GND; PWM
intensity control enabled
T
A
= +25°C
T
A
= -40°C to +85°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= -40°C to +85°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= -40°C to +85°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= -40°C to +85°C
T
A
= T
MIN
to T
MAX
0.7 x
V+
0.3 x
V+
Input = GND or V+
-0.2
8
+0.2
51
40
7
CONDITIONS
MIN
2.0
0
1.2
TYP
MAX
3.6
7
2.3
2.6
3.3
12.1
13.3
14.4
76
78
80
110
117
122
V
V
µA
pF
µA
µA
µA
µA
UNITS
V
V
I
+
Supply Current
(Interface Idle, PWM Enabled)
Supply Current
(Interface Running, PWM
Disabled)
Supply Current
(Interface Running, PWM
Enabled)
Input High Voltage
SDA, SCL, AD0, BLINK,
RST
Input Low Voltage
SDA, SCL, AD0, BLINK,
RST
Input Leakage Current
SDA, SCL, AD0, BLINK,
RST
Input Capacitance
SDA, SCL, AD0, BLINK,
RST
I
+
I
+
I
+
V
IH
V
IL
I
IH
, I
IL
2
_______________________________________________________________________________________
9-Output LED Driver with Intensity Control
and Hot-Insertion Protection
ELECTRICAL CHARACTERISTICS (continued)
(Typical Operating Circuit, V+ = 2V to 3.6V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at V+ = 3.3V, T
A
= + 25°C.)
(Note 1)
PARAMETER
SYMBOL
CONDITIONS
T
A
= +25°C
V+ = 2V, I
SINK
= 20mA
T
A
= -40°C to +85°C
T
A
= T
MIN
to T
MAX
Output Low Voltage
O0–O8
T
A
= +25°C
V
OL
V+ = 2.5V, I
SINK
= 20mA
T
A
= -40°C to +85°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
V+ = 3.3V, I
SINK
= 20mA
Output Low-Voltage SDA
PWM Clock Frequency
V
OLSDA
f
PWM
I
SINK
= 6mA
32
T
A
= -40°C to +85°C
T
A
= T
MIN
to T
MAX
0.12
0.13
MIN
TYP
0.15
MAX
0.25
0.29
0.31
0.22
0.25
0.27
0.22
0.23
0.25
0.4
V
kHz
V
UNITS
MAX6965
TIMING CHARACTERISTICS
(Typical Operating Circuit, V+ = 2V to 3.6V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at V+ = 3.3V, T
A
= +25°C.)
(Note 1)
PARAMETER
Serial Clock Frequency
Bus Free Time Between a STOP and a START
Condition
Hold Time, Repeated START Condition
Repeated START Condition Setup Time
STOP Condition Setup Time
Data Hold Time
Data Setup Time
SCL Clock Low Period
SCL Clock High Period
Rise Time of Both SDA and SCL Signals, Receiving
Fall Time of Both SDA and SCL Signals, Receiving
Fall Time of SDA Transmitting
Pulse Width of Spike Suppressed
Capacitive Load for Each Bus Line
SYMBOL
f
SCL
t
BUF
t
HD, STA
t
SU, STA
t
SU, STO
t
HD, DAT
t
SU, DAT
t
LOW
t
HIGH
t
R
t
F
t
F.TX
t
SP
C
b
(Notes 3, 4)
(Notes 3, 4)
(Notes 3, 5)
(Note 6)
(Note 3)
(Note 2)
180
1.3
0.7
20 +
0.1C
b
20 +
0.1C
b
20 +
0.1C
b
50
400
300
300
250
1.3
0.6
0.6
0.6
0.9
CONDITIONS
MIN
TYP
MAX
400
UNITS
kHz
µs
µs
µs
µs
µs
ns
µs
µs
ns
ns
ns
ns
pF
_______________________________________________________________________________________
3
9-Output LED Driver with Intensity Control
and Hot-Insertion Protection
MAX6965
TIMING CHARACTERISTICS (continued)
(Typical Operating Circuit, V+ = 2V to 3.6V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at V+ = 3.3V, T
A
= +25°C.)
(Note 1)
PARAMETER
RST
Pulse Width
Output Data Valid
SYMBOL
t
W
t
DV
Figure 10
CONDITIONS
MIN
1
5
TYP
MAX
UNITS
µs
µs
Note 1:
All parameters tested at T
A
= +25°C. Specifications over temperature are guaranteed by design.
Note 2:
A master device must provide a hold time of at least 300ns for the SDA signal (referred to V
IL
of the SCL signal) to bridge
the undefined region of SCL’s falling edge.
Note 3:
Guaranteed by design.
Note 4:
C
b
= total capacitance of one bus line in pF. t
R
and t
F
measured between 0.3 x V
DD
and 0.7 x V
DD
.
Note 5:
I
SINK
≤
6mA. C
b
= total capacitance of one bus line in pF. t
R
and t
F
measured between 0.3 x V
DD
and 0.7 x V
DD
.
Note 6:
Input filters on the SDA and SCL inputs suppress noise spikes less than 50ns.
__________________________________________Typical Operating Characteristics
(T
A
= +25°C, unless otherwise noted.)
STANDBY CURRENT vs. TEMPERATURE
9
STANDBY CURRENT (µA)
8
7
6
5
4
3
2
1
0
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
V+ = 2V
PWM ENABLED
V+ = 2.7V
V+ = 3.6V
PWM ENABLED
PWM
V+ = 2V
V+ = 2.7V
PWM DISABLED PWM DISABLED DISABLED
V+ = 3.6V
PWM ENABLED
MAX6965 toc01
SUPPLY CURRENT vs. TEMPERATURE
(PWM DISABLED; f
SCL
= 400kHz)
60
SUPPLY CURRENT (µA)
50
40
V+ = 2.7V
30
20
10
0
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
V+ = 2V
V+ = 3.6V
MAX6965 toc02
SUPPLY CURRENT vs. TEMPERATURE
(PWM ENABLED; f
SCL
= 400kHz)
70
65
60
55
50
45
40
35
30
25
20
15
10
5
0
MAX6965 toc03
10
70
SUPPLY CURRENT (µA)
V+ = 3.6V
V+ = 2.7V
V+ = 2V
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
PORT OUTPUT LOW VOLTAGE WITH 50mA
LOAD CURRENT vs. TEMPERATURE
MAX6965 toc04
PORT OUTPUT LOW VOLTAGE WITH 20mA
LOAD CURRENT vs. TEMPERATURE
MAX6965 toc05
PWM CLOCK FREQUENCY
vs. TEMPERATURE
MAX6965 toc06
0.6
PORT OUTPUT LOW VOLTAGE V
OL
(V)
0.5
V+ = 2.7V
0.4
0.3
0.2
0.1
0
V+ = 3.6V
V+ = 2V
0.6
PORT OUTPUT LOW VOLTAGE V
OL
(V)
0.5
0.4
0.3
0.2
0.1
0
ALL OUTPUTS LOADED
1.050
1.025
PWM CLOCK FREQUENCY
1.000
0.975
V+ = 2.7V
0.950
0.925
0.900
NORMALIZED TO V+ = 3.3V, T
A
= +25°C
V+ = 3.6V
V+ = 2V
V+ = 2V
V+ = 2.7V
V+ = 3.6V
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
4
_______________________________________________________________________________________
9-Output LED Driver with Intensity Control
and Hot-Insertion Protection
MAX6965
Typical Operating Characteristics (continued)
(T
A
= +25°C, unless otherwise noted.)
SCOPE SHOT OF TWO OUTPUT PORTS
MAX6965 toc07
SCOPE SHOT OF TWO OUTPUT PORTS
MAX6965 toc08
SINK CURRENT vs. V
OL
ONLY ONE OUTPUT LOADED
OUTPUT 1
2V/div
0.30
0.25
V
OL
(V)
0.20
0.15
0.10
0.05
0
V+ = 2.7V
V+ = 3.6V
V+ = 3.3V
V+ = 2V
MAX6965 toc09
MASTER INTENSITY SET TO 1/15
OUTPUT 1
2V/div
OUTPUT 1 INDIVIDUAL INTENSITY
SET TO 1/16
0.35
MASTER INTENSITY SET TO 14/15
OUTPUT 1 INDIVIDUAL INTENSITY
SET TO 1/16
OUTPUT 2
2V/div
OUTPUT 2 INDIVIDUAL INTENSITY
SET TO 15/16
2ms/div
OUTPUT 2 INDIVIDUAL INTENSITY
SET TO 14/15
2ms/div
OUTPUT 2
2V/div
0
5
10 15 20 25 30 35 40 45 50
SINK CURRENT (mA)
Pin Description
PIN
QSOP
1
2
3
4–7, 9–13
8
14
15
16
—
QFN
15
16
1
2–5, 7–11
6
12
13
14
PAD
NAME
BLINK
RST
AD0
O0–O8
GND
SCL
SDA
V+
Exposed Pad
FUNCTION
Input Port. Configurable as blink control or general-purpose input.
Reset Input. Active low clears the 2-wire interface and puts the device in same
condition as power-up reset.
Address Input. Sets device slave address. Connect to either GND, V+, SCL, or
SDA to give 4 logic combinations. See Table 1.
Output Ports. O0–O8 are open-drain outputs rated at 7V, 50mA.
Ground. Do not sink more than 190mA into the GND pin.
I
2
C-Compatible Serial Clock Input
I
2
C-Compatible Serial Data I/O
Positive Supply Voltage. Bypass V+ to GND with a 0.047µF ceramic capacitor
Exposed pad on packaged underside. Connect to GND.
_______________________________________________________________________________________
5
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