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MAX7302_0712

更新时间： 2024-11-09 11:14:59
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美信 - MAXIM 驱动器
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30页 313K
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SMBus/I2C Interfaced 9-Port, Level-Translating GPIO and LED Driver with CLA

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MAX7302_0712 数据手册

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19-0749; Rev 1; 12/07  
2
SMBus/I C Interfaced 9-Port,  
Level-Translating GPIO and LED Driver with CLA  
General Description  
Features  
The MAX7302 I2C-/SMBus™-compatible, serial-interfaced  
peripheral features 9 level-translating I/Os, and operates  
from a 1.62V to 3.6V power supply. The MAX7302 fea-  
LA  
♦ 1.62V to 5.5V I/O Level-Translation Port Supply (V  
♦ 1.62V to 3.6V Power Supply  
)
♦ 9 Individually Configurable GPIO Ports  
P1 Open-Drain I/O  
tures a port supply V that allows level-translation on I/O  
LA  
ports to operate from a separate power supply from 1.62V  
to 5.5V. An address select input, AD0, allows up to four  
unique slave addresses for the device.  
P2–P9 Push-Pull or Open-Drain I/Os  
♦ Individual 33-Step PWM Intensity Control  
♦ Blink Controls with 15 Steps on Outputs  
The MAX7302 ports P2–P9 can be configured as inputs,  
push-pull outputs, and open-drain outputs. Port P1 can  
be configured as a general-purpose input, open-drain  
output, or an open-drain INT output. Ports P2–P9 can be  
configured as OSCIN and OSCOUT, respectively. Ports  
P2–P9 can also be used as configurable logic arrays  
(CLAs) to form user-defined logic gates, replacing exter-  
nal discrete gates. Outputs are capable of sinking up to  
25mA, and sourcing up to 10mA when configured as  
push-pull outputs.  
♦ 1kHz PWM Period Provides Flicker-Free LED  
Intensity Control  
♦ 25mA (max) Port Output Sink Current (100mA  
max Ground Current)  
♦ Inputs Overvoltage Protected Up to 5.5V (V  
)
LA  
♦ Transition Detection with Optional Interrupt Output  
♦ Optional Input Debouncing  
♦ I/O Ports Configurable as Logic Gates (CLA)  
♦ External RST Input  
The MAX7302 includes an internal oscillator for PWM,  
blink, and key debounce, or to cascade multiple  
MAX7302s. The external clock can be used to set a spe-  
cific PWM and blink timing. The RST input asynchronous-  
ly clears the 2-wire interface and terminates a bus lockup  
involving the MAX7302.  
♦ Oscillator Input and Output Enable Cascading  
Multiple Devices  
♦ Low 0.75µA (typ) Standby Current  
Ordering Information  
PIN-  
PACKAGE  
PKG  
CODE  
All ports configured as an output feature a 33-step PWM,  
allowing any output to be set from fully off, 1/32 to 31/32  
duty cycle, to fully on. All output ports also feature LED  
blink control, allowing blink periods of 1/8s, 1/4s, 1/2s, 1s,  
2s, 4s, or 8s. Any port can blink during this period with a  
1/16 to 15/16 duty cycle.  
PART  
TEMP RANGE  
MAX7302AEE+ -40°C to +125°C 16 QSOP  
E16-4  
16 TQFN-EP*  
(3mm x 3mm)  
MAX7302ATE+ -40°C to +125°C  
T1633-4  
+Denotes lead-free package.  
*EP = Exposed paddle.  
The MAX7302 is specified over the -40°C to +125°C  
temperature range and is available in 16-pin QSOP and  
16-pin TQFN (3mm x 3mm) packages.  
Typical Operating Circuit  
Applications  
Cell Phones  
+1.8V  
+4.5V  
Servers  
V
DD  
V
LA  
System I/O Ports  
μC  
LCD/Keypad Backlights  
LED Status Indicators  
SDA  
SCL  
RST  
INT  
SDA  
MAX7302  
SCL  
RST  
P2  
P1/INT  
P3  
P4  
P5  
P6  
P7  
P8  
1.8V OPEN-DRAIN OUTPUT  
4.5V PUSH-PULL OUTPUT  
4.5V LOGIC INPUT  
3.3V LOGIC INPUT  
2.5V LOGIC INPUT  
ADO  
P9  
GND  
Pin Configurations appear at end of data sheet.  
SMBus is a trademark of Intel Corp.  
________________________________________________________________ Maxim Integrated Products  
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,  
or visit Maxim's website at www.maxim-ic.com.  
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 		SMBus/I2C Interfaced 9-Port, Level-Translating GPIO and LED Driver with CLA
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