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MAX7315AEE+T

更新时间： 2024-12-01 13:11:03
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19-3056; Rev 0; 10/03  
8-Port I/O Expander with LED Intensity  
Control and Interrupt  
General Description  
Features  
The MAX7315 I2C™-/SMBus-compatible serial interfaced  
peripheral provides microprocessors with 8 I/O ports.  
Each I/O port can be individually configured as either an  
open-drain current-sinking output rated at 50mA at 5.5V,  
or a logic input with transition detection. A ninth port can  
be used for transition detection interrupt or as a general-  
purpose output. The outputs are capable of directly dri-  
ving LEDs, or providing logic outputs with external  
resistive pullup up to 5.5V.  
o 400kbps, 2-Wire Serial Interface, 5.5V Tolerant  
o 2V to 3.6V Operation  
o Overall 8-Bit PWM LED Intensity Control  
Global 16-Step Intensity Control  
Plus Individual 16-Step Intensity Control  
o Automatic Two-Phase LED Blinking  
o 50mA Maximum Port Output Current  
o Outputs Are 5.5V-Rated Open Drain  
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 in 14 intensity steps. Each output then has indi-  
vidual 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.  
o Inputs Are Overvoltage Protected to 5.5V  
o Transition Detection with Interrupt Output  
o Low Standby Current (1.2µA typ; 3.3µA max)  
o Tiny 3mm x 3mm, Thin QFN Package  
o -40°C to +125°C Temperature Range  
o All Ports Can Be Configured as Inputs or Outputs  
The MAX7315 is pin and software compatible with the  
PCA9534 and PCA9554(A).  
Ordering Information  
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 MAX7315 is controlled through the 2-wire I2C/SMBus  
serial interface, and can be configured to one of 64 I2C  
addresses.  
TOP  
MARK  
PART  
TEMP RANGE  
PIN-PACKAGE  
16 Thin QFN  
MAX7315ATE -40 C to +125 C 3mm x 3mm x  
AAU  
0.8mm  
MAX7315AEE -40 C to +125 C 16 QSOP  
MAX7315AUE -40 C to +125 C 16 TSSOP  
—
—
Applications  
Typical Application Circuit  
LCD Backlights  
Keypad Backlights  
RGB LED Drivers  
Cellular Phones  
5V  
LED Status Indication  
Portable Equipment  
Laptop Computers  
3.3V  
0.047  
C
F
Pin Configurations  
V+  
SDA  
P0  
P1  
P2  
P3  
P4  
P5  
TOP VIEW  
SDA  
SCL  
MAX7315  
16 15 14 13  
SCL  
INPUT 1  
INPUT 2  
AD2  
P0  
1
2
3
4
12 SCL  
11 INT/O8  
10 P7  
I/O  
INT/O8  
5V 3.3V  
P6  
P7  
AD0  
AD1  
AD2  
MAX7315ATE  
P1  
OUTPUT1  
OUTPUT2  
GND  
P2  
9
P6  
5
6
7
8
2
Purchase of I C components of Maxim Integrated Products, Inc.,  
or one of its sublicensed Associated Companies, conveys a  
2
QFN  
license under the Philips I C Patent Rights to use these compo-  
2
Pin Configurations continued at end of data sheet.  
nents in an I C system, provided that the system conforms to the  
2
I C Standard Specification as defined by Philips.  
________________________________________________________________ Maxim Integrated Products  
1
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.  
1234567...27

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MAX7315AEE+ MAXIM

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