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MAX6965
9-Output LED Driver with Intensity Control
and Hot-Insertion Protection
________________________________________________________________ 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.
General Description
The MAX6965 I
2
CTM-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.
Applications
LCD Backlights
LED Status Indication
Keypad Backlights
RGB LED Drivers
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 (1.2A (typ), 3.3A (max))
Tiny 3mm x 3mm, Thin QFN Package
-40C to +125C Temperature Range
MAX6965
O0
O1
O2
O3
O4
O5
V+
3.3V
C
SDA
SCL
SDA
I/O
I/O
AD0
6V
O6
O7
O8
SCL
RELAY
RELAY
GND
7V
0.047
F
RST
BLINK
RELAY
Typical Application Circuit
19-3058; Rev 3; 3/05
Ordering Information
PART
TEMP
RANGE
PIN-
PACKAGE
TOP
MARK
PKG
CODE
MAX6965ATE
-40
C to
+125
C
16 Thin QFN
3mm x 3mm
x 0.8mm
AAW
T1633-4
MAX6965AEE
-40
C to
16 QSOP
--
--
Pin Configurations appear at end of data sheet.
Purchase of I
2
C components of Maxim Integrated Products, Inc.,
or one of its sublicensed Associated Companies, conveys a
license under the Philips I
2
C Patent Rights to use these compo-
nents in an I
2
C system, provided that the system conforms to the
I
2
C Standard Specification as defined by Philips.
MAX6965
9-Output LED Driver with Intensity Control
and Hot-Insertion Protection
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 +4V
SCL, SDA, AD0, BLINK, RST ...................................-0.3V to +6V
O0O8 ......................................................................-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
= +70C)
16-Pin QSOP (derate 8.3mW/C over +70C)..............666mW
16-Pin QFN (derate 14.7mW/C over +70C) ............1176mW
Operating Temperature Range (T
MIN
to T
MAX
) ...-40C to +125C
Junction Temperature ......................................................+150C
Storage Temperature Range .............................-65C to +150C
Lead Temperature (soldering, 10s) .................................+300C
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
= +25C.)
(Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Operating Supply Voltage
V+
2.0
3.6
V
Output Load External Supply
Voltage
V
EXT
0
7
V
T
A
= +25C
1.2
2.3
T
A
= -40C to +85C
2.6
Standby Current
(Interface Idle, PWM Disabled)
I
+
S C L and S D A at V + ; other
d i g i tal i np uts at V + or GN D ;
P WM i ntensi ty contr ol d i sab l ed
T
A
= T
MIN
to T
MAX
3.3
A
T
A
= +25C
7
12.1
T
A
= -40C to +85C
13.3
Supply Current
(Interface Idle, PWM Enabled)
I
+
S C L and S D A at V + ; other
d i g i tal i np uts at V + or GN D ;
P WM i ntensi ty contr ol enab l ed
T
A
= T
MIN
to T
MAX
14.4
A
T
A
= +25C
40
76
T
A
= -40C to +85C
78
Supply Current
(Interface Running, PWM
Disabled)
I
+
f
SCL
= 400kHz; other digital
inputs at V+ or GND; PWM
intensity control disabled
T
A
= T
MIN
to T
MAX
80
A
T
A
= +25C
51
110
T
A
= -40C to +85C
117
Supply Current
(Interface Running, PWM
Enabled)
I
+
f
SCL
= 400kHz; other digital
inputs at V+ or GND; PWM
intensity control enabled
T
A
= T
MIN
to T
MAX
122
A
Input High Voltage
SDA, SCL, AD0, BLINK, RST
V
IH
0.7 x
V+
V
Input Low Voltage
SDA, SCL, AD0, BLINK, RST
V
IL
0.3 x
V+
V
Input Leakage Current
SDA, SCL, AD0, BLINK, RST
I
IH
, I
IL
Input = GND or V+
-0.2
+0.2
A
Input Capacitance
SDA, SCL, AD0, BLINK, RST
8
pF
MAX6965
9-Output LED Driver with Intensity Control
and Hot-Insertion Protection
_______________________________________________________________________________________
3
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
= + 25C.)
(Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
T
A
= +25C
0.15
0.25
T
A
= -40C to +85C
0.29
V+ = 2V, I
SINK
= 20mA
T
A
= T
MIN
to T
MAX
0.31
T
A
= +25C
0.13
0.22
T
A
= -40C to +85C
0.25
V+ = 2.5V, I
SINK
= 20mA
T
A
= T
MIN
to T
MAX
0.27
T
A
= +25C
0.12
0.22
T
A
= -40C to +85C
0.23
Output Low Voltage
O0O8
V
OL
V+ = 3.3V, I
SINK
= 20mA
T
A
= T
MIN
to T
MAX
0.25
V
Output Low-Voltage SDA
V
OLSDA
I
SINK
= 6mA
0.4
V
PWM Clock Frequency
f
PWM
32
kHz
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
= +25C.)
(Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Serial Clock Frequency
f
SCL
400
kHz
Bus Free Time Between a STOP and a START
Condition
t
BUF
1.3
s
Hold Time, Repeated START Condition
t
HD, STA
0.6
s
Repeated START Condition Setup Time
t
SU, STA
0.6
s
STOP Condition Setup Time
t
SU, STO
0.6
s
Data Hold Time
t
HD, DAT
(Note 2)
0.9
s
Data Setup Time
t
SU, DAT
180
ns
SCL Clock Low Period
t
LOW
1.3
s
SCL Clock High Period
t
HIGH
0.7
s
Rise Time of Both SDA and SCL Signals, Receiving
t
R
(Notes 3, 4)
20 +
0.1C
b
300
ns
Fall Time of Both SDA and SCL Signals, Receiving
t
F
(Notes 3, 4)
20 +
0.1C
b
300
ns
Fall Time of SDA Transmitting
t
F.TX
(Notes 3, 5)
20 +
0.1C
b
250
ns
Pulse Width of Spike Suppressed
t
SP
(Note 6)
50
ns
Capacitive Load for Each Bus Line
C
b
(Note 3)
400
pF
MAX6965
9-Output LED Driver with Intensity Control
and Hot-Insertion Protection
4
_______________________________________________________________________________________
PORT OUTPUT LOW VOLTAGE WITH 50mA
LOAD CURRENT vs. TEMPERATURE
PORT OUTPUT LOW VOLTAGE V
OL
(V)
0.1
0.2
0.3
0.4
0.5
0.6
0
MAX6965 toc04
TEMPERATURE (
C)
110
95
65 80
-10 5
20 35 50
-25
-40
125
V+ = 3.6V
V+ = 2.7V
V+ = 2V
PORT OUTPUT LOW VOLTAGE WITH 20mA
LOAD CURRENT vs. TEMPERATURE
MAX6965 toc05
TEMPERATURE (
C)
PORT OUTPUT LOW VOLTAGE V
OL
(V)
110
95
80
65
50
35
20
5
-10
-25
0.1
0.2
0.3
0.4
0.5
0.6
0
-40
125
ALL OUTPUTS LOADED
V+ = 3.6V
V+ = 2.7V
V+ = 2V
PWM CLOCK FREQUENCY
vs. TEMPERATURE
MAX6965 toc06
TEMPERATURE (
C)
PWM CLOCK FREQUENCY
110
95
80
65
50
35
20
5
-10
-25
0.925
0.950
0.975
1.000
1.025
1.050
0.900
-40
125
V+ = 3.6V
V+ = 2V
V+ = 2.7V
NORMALIZED TO V+ = 3.3V, T
A
= +25
C
STANDBY CURRENT vs. TEMPERATURE
MAX6965 toc01
TEMPERATURE (
C)
STANDBY CURRENT (
A)
110
95
65 80
-10 5
20 35 50
-25
1
2
3
4
5
6
7
8
9
10
0
-40
125
V+ = 3.6V
PWM ENABLED
V+ = 2.7V
PWM ENABLED
V+ = 2V
PWM DISABLED
V+ = 2.7V
PWM DISABLED
V+ = 3.6V
PWM
DISABLED
V+ = 2V
PWM ENABLED
SUPPLY CURRENT vs. TEMPERATURE
(PWM DISABLED; f
SCL
= 400kHz)
MAX6965 toc02
TEMPERATURE (
C)
SUPPLY CURRENT (
A)
110
95
65 80
-10 5
20 35 50
-25
10
20
30
40
50
60
70
0
-40
125
V+ = 3.6V
V+ = 2.7V
V+ = 2V
5
10
15
20
25
30
35
40
45
50
55
60
65
70
0
SUPPLY CURRENT vs. TEMPERATURE
(PWM ENABLED; f
SCL
= 400kHz)
MAX6965 toc03
TEMPERATURE (
C)
SUPPLY CURRENT (
A)
110
95
65 80
-10 5
20 35 50
-25
-40
125
V+ = 3.6V
V+ = 2.7V
V+ = 2V
__________________________________________Typical Operating Characteristics
(T
A
= +25C, unless otherwise noted.)
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
= +25C.)
(Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
RST Pulse Width
t
W
1
s
Output Data Valid
t
DV
Figure 10
5
s
Note 1: All parameters tested at T
A
= +25C. 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.
MAX6965
9-Output LED Driver with Intensity Control
and Hot-Insertion Protection
_______________________________________________________________________________________
5
SCOPE SHOT OF TWO OUTPUT PORTS
MAX6965 toc07
2ms/div
OUTPUT 1
2V/div
OUTPUT 2
2V/div
MASTER INTENSITY SET TO 1/15
OUTPUT 1 INDIVIDUAL INTENSITY
SET TO 1/16
OUTPUT 2 INDIVIDUAL INTENSITY
SET TO 15/16
SCOPE SHOT OF TWO OUTPUT PORTS
MAX6965 toc08
2ms/div
OUTPUT 1
2V/div
OUTPUT 2
2V/div
OUTPUT 1 INDIVIDUAL INTENSITY
SET TO 1/16
MASTER INTENSITY SET TO 14/15
OUTPUT 2 INDIVIDUAL INTENSITY
SET TO 14/15
SINK CURRENT vs. V
OL
MAX6965 toc09
SINK CURRENT (mA)
V
OL
(V)
45
40
35
30
25
20
15
10
5
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0
0
50
V+ = 3.3V
V+ = 3.6V
V+ = 2V
V+ = 2.7V
ONLY ONE OUTPUT LOADED
Typical Operating Characteristics (continued)
(T
A
= +25C, unless otherwise noted.)
PIN
QSOP
QFN
NAME
FUNCTION
1
15
BLINK
Input Port. Configurable as blink control or general-purpose input.
2
16
RST
Reset Input. Active low clears the 2-wire interface and puts the device in same
condition as power-up reset.
3
1
AD0
Address Input. Sets device slave address. Connect to either GND, V+, SCL, or
SDA to give 4 logic combinations. See Table 1.
47, 913
25, 711
O0O8
Output Ports. O0O8 are open-drain outputs rated at 7V, 50mA.
8
6
GND
Ground. Do not sink more than 190mA into the GND pin.
14
12
SCL
I
2
C-Compatible Serial Clock Input
15
13
SDA
I
2
C-Compatible Serial Data I/O
16
14
V+
Positive Supply Voltage. Bypass V+ to GND with a 0.047F ceramic capacitor
--
PAD
Exposed Pad
Exposed pad on packaged underside. Connect to GND.
Pin Description
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