Rainbow Electronics MAX7358 - Manual

General Description
The MAX7356/MAX7357/MAX7358 8-channel I 2 C
switches/multiplexers expand the main I 2 C bus to any
combination of 8 extended I 2 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
2 C bus writing to the main control register of
these I 2 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
2 C
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
♦ Bus Lock-Up Detection and Isolation (MAX7357,
MAX7358)
♦ Host Notification on Detection of Lock-Up
(MAX7357, MAX7358)
♦ Maintain Fault Diagnostic Information (MAX7357,
MAX7358)
♦ Dual-Function RST/INT Provides Lock-Up
Notification and Hardware Reset (MAX7357,
MAX7358)
♦ RST Input Resets I 2 C Interface (MAX7358)
♦ 3 Address Control Inputs
♦ Low R
ON
Switches
♦ Logic-Level Translation
♦ Low 0.1µA (typ) Standby Current
♦ Support Hot Insertion
♦ 100kbps Standard-Mode or 400kbps Fast-Mode
I 2 C Interface
♦ Address Translation Allows Multiple Device with
Same ID
♦ 5.5V-Tolerant Inputs
♦ 2.3V to 5.5V Supply
MAX7356/MAX7357/MAX7358
1-to-8 I
2
C Bus Switches/Multiplexers with Bus
Lock-Up Detection, Isolation, and Notification
________________________________________________________________ Maxim Integrated Products 1
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
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