MAX7302ATE+【PDF 1/30 页】IC LED DRIVER LINEAR 16-TQFN

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Sheet目录341

[1页]2页 3页 4页 5页

19-0749; Rev 1; 12/07

ATION

EVALU

AVAILA

KIT

BLE

SMBus/I 2 C Interfaced 9-Port,

Level-Translating GPIO and LED Driver with CLA

General Description

Features

The MAX7302

I 2 C-/SMBus?-compatible,

serial-interfaced

? 1.62V to 5.5V I/O Level-Translation Port Supply (V LA )

peripheral features 9 level-translating I/Os, and operates

from a 1.62V to 3.6V power supply. The MAX7302 fea-

tures a port supply V LA that allows level-translation on I/O

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.

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.

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.

? 1.62V to 3.6V Power Supply

? 9 Individually Configurable GPIO Ports

P1 Open-Drain I/O

P2–P9 Push-Pull or Open-Drain I/Os

? Individual 33-Step PWM Intensity Control

? Blink Controls with 15 Steps on 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

? Oscillator Input and Output Enable Cascading

Multiple Devices

? Low 0.75 μ A (typ) Standby Current

Ordering Information

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

PART

MAX7302AEE+

TEMP RANGE

-40°C to +125°C

PIN-

PACKAGE

16 QSOP

PKG

CODE

E16-4

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.

The MAX7302 is specified over the -40°C to +125°C

MAX7302ATE+ -40°C to +125°C

+ Denotes lead-free package.

* EP = Exposed paddle.

16 TQFN-EP*

(3mm x 3mm)

T1633-4

temperature range and is available in 16-pin QSOP and

16-pin TQFN (3mm x 3mm) packages.

Applications

Typical Operating Circuit

Cell Phones

+1.8V

+4.5V

Servers

System I/O Ports

LCD/Keypad Backlights

μ C

SDA

V DD

SDA

V LA

LED Status Indicators

SCL

RST

SCL

RST

MAX7302

INT

P1/INT

1.8V OPEN-DRAIN OUTPUT

4.5V PUSH-PULL OUTPUT

4.5V LOGIC INPUT

3.3V LOGIC INPUT

Pin Configurations appear at end of data sheet.

ADO

GND

2.5V LOGIC INPUT

SMBus is a trademark of Intel Corp.

________________________________________________________________ Maxim Integrated Products

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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