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MAX7360

更新时间: 2024-11-07 11:14:55
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美信 - MAXIM 驱动器开关控制器
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描述
I2C-Interfaced Key-Switch Controller and LED Driver/GPIOs with Integrated ESD Protection

MAX7360 数据手册

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19-4566; Rev 0; 4/09  
I2C-Interfaced Key-Switch Controller and LED  
Driver/GPIOs with Integrated ESD Protection  
General Description  
Features  
The MAX7360 I2C-interfaced peripheral provides micro-  
processors with management of up to 64 key switches,  
with an additional eight LED drivers/GPIOs that feature  
constant-current, PWM intensity control, and rotary  
switch control options.  
S Integrated ESD Protection  
Q8kV IEC 61000-4-2 Contact Discharge  
Q15kV IEC 61000-4-2 Air-Gap Discharge  
S +14V Tolerant, Open-Drain I/O Ports Capable of  
Constant-Current LED Drive  
The key-switch drivers interface with metallic or resistive  
switches with on-resistances up to 5kI. Key inputs  
are monitored statically, not dynamically, to ensure  
low-EMI operation. The MAX7360 features autosleep  
and autowake modes to further minimize the power  
consumption of the device. The autosleep feature puts  
the device in a low-power state (1FA typ) after a sleep  
timeout period. The autowake feature configures the  
MAX7360 to return to normal operating mode from sleep  
upon a keypress.  
S Rotary Switch-Capable Input Pair (PORT6, PORT7)  
S 256-Step PWM Individual LED Intensity Control  
S Individual LED Blink Rates and Common LED  
Fade In/Out Rates from 256ms to 4096ms  
S FIFO Queues Up to 16 Debounced Key Events  
S User-Configurable Key Debounce (9ms to 40ms)  
S Keyscan Uses Static Matrix Monitoring for Low  
EMI Operation  
S +1.62V to +3.6V Operation  
S Monitors Up to 64 Keys  
The key controller debounces and maintains a FIFO of  
keypress and release events (including autorepeat, if  
enabled). An interrupt (INTK) output can be configured  
to alert keypresses, as they occur, or at maximum rate.  
S Key-Switch Interrupt (INTK) on Each Debounced  
Event/FIFO Level, or End of Definable Time Period  
There are eight open-drain I/O ports, which can be used  
to drive LEDs. The maximum constant-current level for  
each open-drain port is 20mA. The intensity of the LED  
on each open-drain port can be individually adjusted  
through a 256-step PWM control. An input port pair  
(PORT6, PORT7) can be configured to accept 2-bit gray  
code inputs from a rotary switch. In addition, if not used  
for key-switch control, up to six column pins can be used  
as general-purpose open-drain outputs (GPOs) for LED  
drive or logic control.  
S Port Interrupt (INTI) for Input Ports for Special-Key  
Functions  
S 400kbps, +5.5V Tolerant 2-Wire Serial Interface  
with Selectable Bus Timeout  
S Four I2C Address Choices  
Ordering Information  
PART  
MAX7360ETL+  
MAX7360EWX+**  
TEMP RANGE  
-40°C to +85°C  
-40°C to +85°C  
PIN-PACKAGE  
40 TQFN-EP*  
36 WLP  
The MAX7360 is offered in a 40-pin (5mm x 5mm) thin  
QFN package with an exposed pad, and a small 36-bump  
wafer level package (WLP) for cell phones, pocket PCs,  
and other portable consumer electronic applications. The  
MAX7360 operates over the -40NC to +85NC extended  
temperature range.  
+Denotes a lead(Pb)-free/RoHS-compliant package.  
*EP = Exposed pad.  
**Future product—contact factory for availability.  
Simplfied Block Diagram  
Applications  
+1.8V  
Cell Phones  
+14V  
ROTARY  
SWITCH  
PDAs  
TO  
FC  
SCL  
SDA  
INTI  
INTK  
Handheld Games  
Portable Consumer Electronics  
Printers  
PORT7  
PORT6  
MAX7360  
PORT0  
Instrumentation  
AD0  
ROW_(8x)  
COL_(8x)  
8 x 8  
Pin Configurations appear at end of data sheet.  
_______________________________________________________________ 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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