Rainbow Electronics MAX7313 - Manual

General Description
The MAX7313 I 2 C™-compatible serial interfaced
peripheral provides microprocessors with 16 I/O ports.
Each I/O port can be individually configured as either
an open-drain current-sinking output rated at 50mA and
5.5V, or a logic input with transition detection. A 17th
port can be used for transition detection interrupt, or as
a general-purpose output. The outputs are capable of
driving LEDs, or providing logic outputs with external
resistive pullup up to 5.5V.
PWM current drive is integrated with 8 bits of control.
Four 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 in between. Each output
then has 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.
The MAX7313 is pin and software compatible with the
MAX7311, PCA9535, and PCA9555.
Each output has independent blink timing with two blink
phases. All LEDs can be individually set to be on or off
during either blink phase, or to ignore the blink control.
The blink period is controlled by a register.
The MAX7313 is controlled through the 2-wire
I
2 C/SMBus serial interface, and can be configured to
any one of 64 I 2 C addresses.
Applications
Features
♦ 400kbs, 2-Wire Serial Interface, 5.5V Tolerant
♦ 2V to 3.6V Operation
♦ Overall 8-Bit PWM LED Intensity Control
Global 16-Step Intensity Control
Individual 16-Step Intensity Controls
♦ Two-Phase LED Blinking
♦ 50mA Maximum Port Output Current
♦ Outputs are 5.5V-Rated Open Drain
♦ Inputs are Overvoltage Protected to 5.5V
♦ Transition Detection with Interrupt Output
♦ 1.2µA (typ), 3.6µA (max) Standby Current
♦ Tiny 4mm x 4mm Thin QFN Package
♦ -40°C to +125°C Temperature Range
♦ All Ports Can Be Configured as Inputs or Outputs
MAX7313
16-Port I/O Expander with LED Intensity
Control and Interrupt
________________________________________________________________ Maxim Integrated Products 1
AD2 AD1 V+ SDA
P10
P4
P3
P2
P1
P0 AD0 1
2
3
4
5
6
19 20 21 22 23 24
SCL
P15
P14
P13
P12
P11
P9 P8 P7 P6
P5
GND
18
17
16
15
14
13
7 8 9 10 11 12
INT/O16
TOP VIEW
QFN
MAX7313ATG
Pin Configurations
MAX7313
P8
P10
P0
P1
P2
P3
P4
P5
P6
P7
V+
3.3V
µC
SDA
SCL
SDA
I/O
AD0
5V 3.3V
P11
P12
P13
P14
P15
SCL
P9
OUTPUT 11
OUTPUT 10
GND
5V
INPUT 1
INPUT 2
INPUT 3
INPUT 4
INPUT 5
AD2
AD1
0.047 µF
INT/O16
Typical Application Circuit
19-3059; Rev 0; 10/03
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
MAX7313ATG -40 °C to +125°C
24 Thin QFN
4mm x 4mm x 0.8mm
MAX7313AEG -40 °C to +125°C 24 QSOP
Pin Configurations continued at end of data sheet.
LCD Backlights
LED Status Indication
Portable Equipment
Keypad Backlights
RGB LED Drivers
Notebook Computers
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.