MAX7356/MAX7357/MAX7358 19-4207 Rev 0 9/08 2 1-to-8 I C Bus Switches/Multiplexers with Bus Lock-Up Detection, Isolation, and Notification General Description Features 2 Bus Lock-Up Detection and Isolation (MAX7357, The MAX7356/MAX7357/MAX7358 8-channel I C 2 MAX7358) switches/multiplexers expand the main I C bus to any 2 combination of 8 extended I C buses. They enable a Host Notification on Detection of Lock-Up (MAX7357, MAX7358) master on the main bus to isolate and communicate with devices or groups of devices that may otherwise Maintain Fault Diagnostic Information (MAX7357, have slave address conflicts. Any extended bus can be MAX7358) connected or disconnected by control packets from the Dual-Function RST/INT Provides Lock-Up 2 main I C bus writing to the main control register of Notification and Hardware Reset (MAX7357, 2 these I C switches. MAX7358) 2 RST Input Resets I C Interface (MAX7358) The MAX7357 and MAX7358 feature an enhanced mode that includes a built-in timer used to monitor all 3 Address Control Inputs extended buses for lock-up conditions. If the clock or Low R Switches ON data line of any of these buses is low for more than Logic-Level Translation 25ms (typ), a lock condition is detected. An optional Low 0.1A (typ) Standby Current interrupt can be generated through the bidirectional RST/INT. The master can read the bus lock-up register Support Hot Insertion to find out which extended bus is locked up. The mas- 100kbps Standard-Mode or 400kbps Fast-Mode 2 ter can also enable the MAX7357 or the MAX7358 to I C Interface send a flush-out sequence on the faulty channel. Address Translation Allows Multiple Device with There is an optional preconnection check that Same ID can be enabled to toggle the extended bus clock and 5.5V-Tolerant Inputs data line low then high to ensure the downstream bus is 2.3V to 5.5V Supply 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 2 multiple masters. Any device connected to an I C Ordering Information bus can transmit and receive signals however, only the PART TEMP RANGE PIN-PACKAGE master connected to the host side of the MAX7356/ MAX7357/MAX7358 should address the device. MAX7356ETG+ -40C to +85C 24 TQFN-EP* MAX7356EUG+** -40C to +85C 24 TSSOP The MAX7356/MAX7357/MAX7358 are available in 24-pin TSSOP and TQFN packages and are specified over the MAX7357ETG+ -40C to +85C 24 TQFN-EP* extended -40C to +85C temperature range. MAX7357EUG+** -40C to +85C 24 TSSOP MAX7358ETG+ -40C to +85C 24 TQFN-EP* Applications MAX7358EUG+** -40C to +85C 24 TSSOP Servers +Denotes a lead-free/RoHS-compliant package. RAID *EP = Exposed pad. Base Stations **Future productcontact factory for availability. Control and Automation Devices SFP Control Interface Networking Equipment Selector Guide ENHANCED PRECONNECTION POWER-UP RST/INT PART MODE WIGGLE TEST STATE 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 Typical Operating Circuit and Pin Configurations appear at end of data sheet. Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com. EVALUATION KIT AVAILABLE2 1-to-8 I C Bus Switches/Multiplexers with Bus Lock-Up Detection, Isolation, and Notification ABSOLUTE MAXIMUM RATINGS (Voltages referenced to GND.) Junction-to-Case Thermal Resistance ( ) (Note 1) JC V .................................................................. -0.3V to +6.0V DD 24-Pin TSSOP...............................................................13C/W All Other Pins.....................................................-0.3V to +6.0V 24-Pin TQFN................................................................3.0C/W Input Currents Junction-to-Ambient Thermal Resistance ( ) (Note 1) JA V ...............................................................................100mA DD 24-Pin TSSOP............................................................72.0C/W GND ..............................................................................100mA 24-Pin TQFN..............................................................36.0C/W All Input Pins.....................................................................20mA Operating Temperature Range ......................... -40C to +85C Output Current ....................................................................25mA Junction Temperature .................................................... +150C Continuous Power Dissipation (T = +70C) Storage Temperature Range ........................... -65C to +150C A 24-Pin TSSOP (derate 13.9mW/C above +70C) .....1111mW Lead Temperature (soldering, 10s) ................................+300C 24-Pin TQFN (derate 27.8mW/C above +70C) .......2222mW Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a 4-layer board. For detailed information on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial. Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS (3.3V SUPPLY) (V = +2.3V to +3.6V, T = -40C to +85C, unless otherwise noted. Typical values are at V = +3.3V, T = +25C.) (Notes 25) DD A DD A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS POWER SUPPLY Supply Voltage V 2.3 3.6 V DD Basic mode 30 50 V = 3.6V DD Supply Current I no load, f = A SCL DD Enhanced mode 45 70 400kHz (MAX7357/MAX7358 only) Standby Current I No load, V = V or GND, V = 3.6V 0.1 1 A STB I DD DD Power-On Reset Voltage V V rising 0.9 1.4 2.1 V POR DD Power-On Reset Hysteresis V 0.4 V HYST INPUT SCL, INPUT/OUTPUT SDA 0.3 x Low-Level Input Voltage V V IL V DD 0.7 x High-Level Input Voltage V V IH V DD V = 0.4V 3 OL Low-Level Output Current I mA OL V = 0.6V 6 OL Input Leakage Current I , I V and V = V or GND -1 +1 A LH LI SCL SDA DD Input Capacitance C V = GND 15 pF I I SELECT INPUTS A0 to A2, RST 0.3 x Low-Level Input Voltage V V IL V DD 0.7 x High-Level Input Voltage V V IH V DD Input Leakage Current I A0 to A2, and RST at V or GND -1 +1 A LI DD Input Capacitance C V = GND 2 pF I I 2 MAX7356/MAX7357/MAX7358