Datasheet > MAX7314

MAX7314

更新时间： 2024-11-08 14:58:03

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描述
18端口GPIO，带有LED亮度控制和中断，提供热插入保护

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数据手册

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MAX7314 数据手册

19-3170; Rev 4; 4/05

18-Port GPIO with LED Intensity Control,

Interrupt, and Hot-Insertion Protection

General Description

Features

The MAX7314 I²C-compatible serial interfaced periph-

eral provides microprocessors with 16 I/O ports plus one

output-only port and one input-only port. 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. The output-only port can

be assigned as an interrupt output for transition detec-

tion. The outputs are capable of driving LEDs, or provid-

ing logic outputs with external resistive pullup up to 5.5V.

♦ 400kbps, 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

♦ 2-Phase LED Blinking

♦ 50mA Maximum Port Output Current

♦ Supports Hot Insertion

Eight-bit PWM current control is built in for all 17 output

ports. A 4-bit global control applies to all LED outputs

and provides coarse adjustment of current from fully off

to fully on with 14 intensity steps in between. Each out-

put has an 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.

♦ 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) Operating Current

♦ Small 4mm x 4mm, Thin QFN Package

♦ -40°C to +125°C Temperature Range

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 clock input (up to 1kHz)

on BLINK or by a register. The BLINK input can also be

used as a logic control to turn the LEDs on and off, or as a

general-purpose input.

Ordering Information

PIN-

PACKAGE

PKG

CODE

PART

TEMP RANGE

24 Thin QFN

MAX7314ATG -40°C to +125°C 4mm x 4mm T2444-4

x 0.8mm

The MAX7314 supports hot insertion. All port pins, the

INT output, SDA, SCL, RST, BLINK, and the slave

address input ADO remain high impedance in power-

down (V+ = 0V) with up to 6V asserted upon them.

MAX7314AEG -40°C to +125°C 24 QSOP

—

Typical Application Circuit

The MAX7314 is controlled through a 2-wire serial inter-

face, and uses four-level logic to allow four I²C

addresses from only one select pin.

Applications

3.3V

LCD Backlights

0.047μF

LED Status Indication

Relay Drivers

V+

SDA

μC

SDA

SCL

I/O

MAX7314

SCL

Keypad Backlights

RGB LED Drivers

System I/O Ports

BLINK

RST

I/O

INT

INT/O16

AD0

INPUT 1

INPUT 2

INPUT 3

INPUT 4

INPUT 5

Pin Configurations continued at end of data sheet.

P10

P11

P12

P13

P14

P15

3.3V

GND

OUTPUT

________________________________________________________________ Maxim Integrated Products

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.

12 3 4 5 6 7...25

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与MAX7314相关器件

型号	品牌	获取价格	描述	数据表
MAX7314AEG	MAXIM	获取价格	18-Port GPIO with LED Intensity Control, Interrupt, and Hot-Insertion Protection
MAX7314AEG+	MAXIM	获取价格	Parallel I/O Port, 8-Bit, 16 I/O, BICMOS, PDSO24, 0.150 INCH, 0.025 INCH PITCH, MO-137, QS
MAX7314AEG+T	MAXIM	获取价格	Parallel I/O Port, 8-Bit, 16 I/O, BICMOS, PDSO24, 0.150 INCH, 0.025 INCH PITCH, MO-137, QS
MAX7314AEG-T	MAXIM	获取价格	Parallel I/O Port, 8-Bit, 16 I/O, BICMOS, PDSO24, 0.150 INCH, 0.025 INCH PITCH, MO-137, QS
MAX7314ATG	MAXIM	获取价格	18-Port GPIO with LED Intensity Control, Interrupt, and Hot-Insertion Protection
MAX7314ATG+	MAXIM	获取价格	Parallel I/O Port, 8-Bit, 16 I/O, BICMOS, 4 X 4 MM, 0.80 MM HEIGHT, MO-220WGGD2, TQFN-24
MAX7314ATG+T	MAXIM	获取价格	Parallel I/O Port, 8-Bit, 16 I/O, BICMOS, 4 X 4 MM, 0.80 MM HEIGHT, MO-220WGGD2, TQFN-24
MAX7314ATG-T	MAXIM	获取价格	Parallel I/O Port, 8-Bit, 16 I/O, BICMOS, 4 X 4 MM, 0.80 MM HEIGHT, MO-220WGGD2, TQFN-24
MAX7315	MAXIM	获取价格	8-Port I/O Expander with LED Intensity Control and Interrupt
MAX7315	ADI	获取价格	8端口输入/输出扩展器，带有LED亮度控制和中断，提供热插入保护

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