Datasheet > MAX7321

MAX7321

更新时间： 2023-12-20 18:45:45

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
15页	967K
描述
I2C端口扩展器，具有8路漏极开路I/O

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MAX7321 数据手册

MAX7321

I C Port Expander with 8 Open-Drain I/Os

Functional Overview

Detailed Description

The MAX7321 is a general-purpose port expander

operating from a +1.71V to +5.5V supply that provides

eight open-drain I/O ports. Each open-drain output is

rated to sink 20mA, and the entire device is rated to

sink 100mA into all ports combined. The outputs drive

loads connected to supplies up to +5.5V, independent

of the MAX7321’s supply voltage.

MAX7319–MAX7329 Family Comparison

The MAX7319–MAX7323 family consists of five pin-

compatible,eight-portexpanders.Eachversionisoptimized

for different applications. The MAX7328 and MAX7329

are industry standard parts.

The MAX7324–MAX7327 family consists of four pin-

compatible, 16-port expanders that integrate the

functions of the MAX7320 and one of either the MAX7319,

MAX7321, MAX7322, or MAX7323.

The MAX7321 is set to one of 16 I C slave addresses

(0x60 to 0x6F) using the address select inputs AD0 and

AD2, and is accessed over an I C serial interface up

to 400kHz. The RST input clears the serial interface in

Table 1. MAX7319–MAX7329 Family Comparison

I C

INPUT

INPUTS INTERRUPT

MASK

OPEN-

DRAIN

PUSH-

PULL

PART

SLAVE

APPLICATION

ADDRESS

OUTPUTS OUTPUTS

8-PORT EXPANDERS

Input-only versions:

8 input ports with programmable latching transition

detection interrupt and selectable pullups.

Offers maximum versatility for automatic input

monitoring. An interrupt mask selects which inputs

cause an interrupt on transitions, and transition flags

identify which inputs have changed (even

MAX7319

110xxxx

Yes

—

momentarily) since the ports were last read.

Output-only versions:

8 push-pull outputs with selectable power-up default

levels.

MAX7320

101xxxx

—

Push-pull outputs offer faster rise time than open-

rain outputs, and require no pullup resistors.

I/O versions:

8 open-drain I/O ports with latching transition

detection interrupt and selectable pullups.

Open-drain outputs can level shift the logic-high state

to a higher or lower voltage than V+ using external

pullup resistors. Any port can be used as an input by

setting the open-drain output to logic-high. Transition

flags identify which inputs have changed (even

momentarily) since the ports were last read.

MAX7321

110xxxx

Up to 8

—

Up to 8

—

4 input-only, 4 output-only versions:

4 input ports with programmable latching transition

detection interrupt and selectable pullups;

4 push-pull outputs with selectable power-up default

levels.

MAX7322

110xxxx

Yes

—

Maxim Integrated

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