Rainbow-electronics MAX7358 Manual de usuario descargar pdf

General Description

The MAX7356/MAX7357/MAX7358 8-channel I

switches/multiplexers expand the main I

C bus to any

combination of 8 extended I

C buses. They enable a

master on the main bus to isolate and communicate

with devices or groups of devices that may otherwise

have slave address conflicts. Any extended bus can be

connected or disconnected by control packets from the

main I

C bus writing to the main control register of

these I

C switches.

The MAX7357 and MAX7358 feature an enhanced

mode that includes a built-in timer used to monitor all

extended buses for lock-up conditions. If the clock or

data line of any of these buses is low for more than

25ms (typ), a lock condition is detected. An optional

interrupt can be generated through the bidirectional

RST/INT. The master can read the bus lock-up register

to find out which extended bus is locked up. The mas-

ter can also enable the MAX7357 or the MAX7358 to

send a “flush-out” sequence on the faulty channel.

There is an optional preconnection check that

can be enabled to toggle the extended bus clock and

data line low then high to ensure the downstream bus is

not locked high prior to connecting it to the host bus.

The MAX7356/MAX7357/MAX7358 are transparent

to signals sent and received at each channel, allowing

multiple masters. Any device connected to an I

bus can transmit and receive signals; however, only the

master connected to the host side of the MAX7356/

MAX7357/MAX7358 should address the device.

The MAX7356/MAX7357/MAX7358 are available in 24-pin

TSSOP and TQFN packages and are specified over the

extended -40°C to +85°C temperature range.

Applications

Features

o Bus Lock-Up Detection and Isolation (MAX7357,

MAX7358)

o Host Notification on Detection of Lock-Up

(MAX7357, MAX7358)

o Maintain Fault Diagnostic Information (MAX7357,

MAX7358)

o Dual-Function RST/INT Provides Lock-Up

Notification and Hardware Reset (MAX7357,

MAX7358)

o RST Input Resets I

C Interface (MAX7358)

o 3 Address Control Inputs

o Low R

Switches

o Logic-Level Translation

o Low 0.1µA (typ) Standby Current

o Support Hot Insertion

o 100kbps Standard-Mode or 400kbps Fast-Mode

C Interface

o Address Translation Allows Multiple Device with

Same ID

o 5.5V-Tolerant Inputs

o 2.3V to 5.5V Supply

MAX7356/MAX7357/MAX7358

1-to-8 I

C Bus Switches/Multiplexers with Bus

Lock-Up Detection, Isolation, and Notification

________________________________________________________________

Maxim Integrated Products

19-4207; Rev 0; 9/08

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.

Ordering Information

PART TEMP RANGE PIN-PACKAGE

MAX7356ETG+ -40°C to +85°C 24 TQFN-EP*

MAX7356EUG+** -40°C to +85°C 24 TSSOP

MAX7357ETG+ -40°C to +85°C 24 TQFN-EP*

MAX7357EUG+** -40°C to +85°C 24 TSSOP

MAX7358ETG+ -40°C to +85°C 24 TQFN-EP*

MAX7358EUG+** -40°C to +85°C 24 TSSOP

Denotes a lead-free/RoHS-compliant package.

EP = Exposed pad.

Future product—contact factory for availability.

Typical Operating Circuit and Pin Configurations appear at end of data sheet.

PART

ENHANCED

MODE

PRECONNECTION

WIGGLE TEST

POWER-UP

STATE

RST/INT

BIDIRECTIONAL

MAX7356 No No Basic mode RST only

MAX7357 Yes Yes, enhanced mode only Enhanced mode Yes

MAX7358 Yes Yes, enhanced mode only Basic mode Yes

Selector Guide

Servers

RAID

Base Stations

Control and Automation Devices

SFP Control Interface

Networking Equipment

1 2 3 4 5 6 ... 21 22

MAX7356/MAX7357/MAX7358 1
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Indice de contenidos

Pagina 1 - 1-to-8 I

General DescriptionThe MAX7356/MAX7357/MAX7358 8-channel I2Cswitches/multiplexers expand the main I2C bus to anycombination of 8 extended I2C buses. T

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MAX7356/MAX7357/MAX73581-to-8 I2C Bus Switches/Multiplexers with BusLock-Up Detection, Isolation, and Notification10 _________________________________

Pagina 3