Rainbow Electronics MAX6964 - Manual

General Description
The MAX6964 I 2 C™-compatible serial interfaced
peripheral provides microprocessors with 17 output
ports. Each output is an open-drain current-sinking out-
put rated at 50mA and 7V. The 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
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 MAX6964 is controlled through a 2-wire I 2 C
serial interface, and can be configured to one of four
I
2 C addresses.
Applications
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 the Serial Interface and
Restores Power-Up Default State
♦ Outputs are 7V-Rated Open Drain
♦ Low Standby Current (1.2µA (typ), 3.3µA (max))
♦ Small 4mm x 4mm, 0.8mm High Thin QFN Package
♦ -40°C to +125°C Temperature Range
MAX6964
17-Output LED Driver/GPO
with Intensity Control
________________________________________________________________ Maxim Integrated Products 1
RST AD0 V+ SDA
O10
O4
O3
O2
O1
O0 BLINK 1
2
3
4
5
6
19 20 21 22 23 24
SCL
O15
O14
O13
O12
O11
O9 O8 O7 O6
O5
GND
18
17
16
15
14
13
7 8 9 10 11 12
O16
TOP VIEW
QFN
MAX6964
Pin Configurations
MAX6964
O8
O10
O0
O1
O2
O3
O4
O5
O6
O7
V+
3.3V
µC
SDA
SCL
SDA
I/O
I/O
AD0
5V 3.3V 6V
O11
O12
O13
O14
O15
SCL
O9
OUTPUT
OUTPUT
RELAY
RELAY
GND
7V
0.047µF
RST
BLINK
O16
RELAY
Typical Application Circuit
19-3179; Rev 0; 1/04
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.
Ordering Information
PART TEMP RANGE PIN-PACKAGE
MAX6964ATG -40 ° C to +125 ° C
24 Thin QFN
4mm x 4mm x 0.8mm
MAX6964AEG -40
°
C to +125
°
C 24 QSOP
Pin Configurations continued at end of data sheet.
LCD Backlights
LED Status Indication
Keypad Backlights
RGB LED Drivers
I 2 C is a trademark of Philips Corp. 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 components in an I 2 C system, provid-
ed that the system conforms to the I 2 C Standard Specification as
defined by Philips.