Datasheet

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General Description

The MAX7367/MAX7368/MAX7369 bidirectional, four-

channel I

C switches/multiplexer expand the main I

bus up to four extended buses. The MAX7369 1:4

multiplexer connects the main I

C bus to one channel

at a time. The MAX7367/MAX7368 four-channel

switches connect the main I

C bus to one or more

channels at a time.

These devices isolate bus loading by extending the I

bus onto different channels. The MAX7367/MAX7368/

MAX7369 allow more devices to be interconnected to a

master controller and multiple devices with the same

C address to communicate to a master. The channels

are selected through the main I

C bus by writing to the

internal control register of the device.

Any device connected to an I

C bus can transmit and

receive signals. The MAX7367/MAX7368/MAX7369 are

transparent to signals sent and received at each chan-

nel, allowing multiple masters. These devices are com-

patible with the I

C protocol of clock stretch,

synchronization, and arbitration in case multiple mas-

ters address the bus at the same time.

All devices are set to the default state during initial

power-up. The MAX7367/MAX7368 have a RESET input

allowing external circuitry to set the MAX7367/MAX7368

to its default state anytime after the device has pow-

ered up. The MAX7367/MAX7369 have interrupt inputs,

allowing devices on the extended bus to send an inter-

rupt signal to the master on the main bus.

The MAX7367/MAX7369 are available in 20-pin TSSOP

packages, and the MAX7368 is available in a 16-pin

TSSOP package. All devices operate over the -40°C to

+85°C extended temperature range.

Applications

Servers

RAID

Cellular Phones

Base Stations

PCs

Multimedia Electronics

SAN/NAS

Features

o Four-Channel, Bidirectional Bus Expansion

o Voltage-Level Translation

o Low 6µA (typ) Supply Current, 0.1µA (typ)

Standby Current

o Low 16Ω (typ) On-Resistance

o Channel Selection Through I

o I

C-Compatible Normal or Fast Mode

o Device Address Selection

Up to Four Addresses (MAX7367)

Up to Eight Addresses (MAX7368/MAX7369)

o Bus-Loading Isolation

o Support Clock Stretch, Synchronization, and

Arbitration

o Hot Insertion

o 2.3V to 5.5V Supply Voltage Range

o 5V-Tolerant Inputs

o Interrupt from Extended Buses

(MAX7367/MAX7369)

o Hardware Reset (MAX7367/MAX7368)

MAX7367/MAX7368/MAX7369

4-Channel I

C Switches/Multiplexer

________________________________________________________________

Maxim Integrated Products

SDA

SCL

INTINT0

RESET

TOP VIEW

MAX7367

SC3

SD3

INT3INT1

SC0

138 SC2SD1

129 SD2SC1

1110 INT2GND

SD0

TSSOP

Pin Configurations

19-0644; Rev 2; 2/09

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.

Pin Configurations continued at end of data sheet.

Ordering Information

Denotes a lead(Pb)-free/RoHS-compliant package.

PART TEMP RANGE

PIN-

PACKAGE

MAX7367EUP+ -40°C to +85°C 20 TSSOP

MAX7368EUE+ -40°C to +85°C 16 TSSOP

MAX7369EUP+ -40°C to +85°C 20 TSSOP

Summary of content (19 pages)

PAGE 1
9-0644; Rev 2; 2/09 4-Channel I2C Switches/Multiplexer The MAX7367/MAX7368/MAX7369 bidirectional, fourchannel I2C switches/multiplexer expand the main I2C bus up to four extended buses. The MAX7369 1:4 multiplexer connects the main I2C bus to one channel at a time. The MAX7367/MAX7368 four-channel switches connect the main I 2C bus to one or more channels at a time. These devices isolate bus loading by extending the I2C bus onto different channels.
PAGE 2
MAX7367/MAX7368/MAX7369 4-Channel I2C Switches/Multiplexer ABSOLUTE MAXIMUM RATINGS VDD to GND ...........................................................-0.3V to +6.0V All Other Pins to GND............................................-0.3V to +6.0V Input Currents VDD ...............................................................................100mA GND ..............................................................................100mA All Input Pins........................................................
PAGE 3
4-Channel I2C Switches/Multiplexer MAX7367/MAX7368/MAX7369 ELECRTICAL CHARACTERISTICS (3.3V SUPPLY) (continued) (VDD = 2.3V to 3.6V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at VDD = 3.3V, TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX VDD = 3V to 3.6V, IO = 15mA, VO = 0.4V 5 16 30 VDD = 2.3V to 2.7V, IO = 10mA, VO = 0.4V 7 23 55 VI(SW) = VDD = 3.0V to 3.6V, IO = -100µA 1.6 1.9 2.8 VI(SW) = VDD = 2.3V to 2.7V, IO = -100µA 1.
PAGE 4
MAX7367/MAX7368/MAX7369 4-Channel I2C Switches/Multiplexer ELECRTICAL CHARACTERISTICS (5V SUPPLY) (continued) (VDD = 4.5V to 5.5V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at VDD = 5V, TA = +25°C.) (Note 1) PARAMETER SYMBOL Input Leakage Current IL Input Capacitance CI CONDITIONS MIN TYP -1 All inputs = GND MAX UNITS +1 µA 5 pF PASS GATE Switch On-Resistance RON Switch Output Voltage VPASS Leakage Current Input/Output Capacitance VDD = 4.5V to 5.
PAGE 5
4-Channel I2C Switches/Multiplexer MAX7367/MAX7368/MAX7369 TIMING CHARACTERISTICS (Figure 1) (continued) (VDD = 2.3V to 5.5V, TA = -40°C to +85°C, unless otherwise noted.) (Note 1) PARAMETER SYMBOL Fall Time of Both SDA and SCL Signals CONDITIONS MIN TYP fSCL = 100kHz tf Capacitive Load for Each Bus Line Cb Pulse Width of Spikes Suppressed tSP MAX UNITS 300 20 + 0.
PAGE 6
MAX7367/MAX7368/MAX7369 4-Channel I2C Switches/Multiplexer INT_ 50% 50% tIV INT tW(REJ)L tIR tW(REJ)H 50% 50% Figure 2. INT Timing Diagram SCL SDA tREC;STA tRST RESET tWL(RST) Figure 3.
PAGE 7
4-Channel I2C Switches/Multiplexer PROPAGATION DELAY vs. SUPPLY VOLTAGE VPASS (V) 3.0 4 3 2.5 2.0 1.5 2 RISING EDGE 1 2.7 3.1 3.5 3.9 4.3 4.7 5.1 50 30 20 0.5 10 SCL = 100kHz AND SDA = 0V 0 2.3 5.5 SCL = 400kHz AND SDA = 0V 40 2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5 SUPPLY VOLTAGE (V) SUPPLY VOLTAGE (V) 2.3 2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5 SUPPLY VOLTAGE (V) SUPPLY CURRENT vs. SCL FREQUENCY 60 MAX7367 toc04 2.3 60 1.0 0 0 70 SUPPLY CURRENT (μA) 3.
PAGE 8
4-Channel I2C Switches/Multiplexer MAX7367/MAX7368/MAX7369 Pin Description PIN 8 NAME FUNCTION MAX7367 MAX7368 MAX7369 1 1 1 A0 Device Address Bit 0 (LSB) 2 2 2 A1 Device Address Bit 1 3 3 — RESET 4 — 4 INT0 Channel 0 Active-Low Interrupt Input. A logic-low INT0 asserts INT. If not used, pull up INT0 through a resistor to VDD. 5 4 5 SD0 Channel 0 Serial Data 6 5 6 SC0 Channel 0 Serial Clock Active-Low Reset Input 7 — 7 INT1 Channel 1 Active-Low Interrupt Input.
PAGE 9
4-Channel I2C Switches/Multiplexer SC0 SC1 SC2 SC3 SD0 SD1 SD2 SD3 SWITCH CONTROL LOGIC RESET VDD POWER-ON RESET SCL GLITCH FILTER SDA INT[0–3] MAX7367 I2C BUS CONTROL INTERRUPT LOGIC A0 A1 INT GND _______________________________________________________________________________________ 9 MAX7367/MAX7368/MAX7369 MAX7367 Functional Diagram
PAGE 10
4-Channel I2C Switches/Multiplexer MAX7367/MAX7368/MAX7369 MAX7368 Functional Diagram SC0 SC1 SC2 SC3 SD0 SD1 SD2 SD3 SWITCH CONTROL LOGIC RESET VDD POWER-ON RESET SCL GLITCH FILTER SDA MAX7368 I2C BUS CONTROL A0 A1 A2 GND 10 ______________________________________________________________________________________
PAGE 11
4-Channel I2C Switches/Multiplexer SC0 SC1 SC2 SC3 SD0 SD1 SD2 SD3 SWITCH CONTROL LOGIC VDD POWER-ON RESET SCL GLITCH FILTER SDA INT[0–3] MAX7369 I2C BUS CONTROL INTERRUPT LOGIC A0 A1 A2 INT GND ______________________________________________________________________________________ 11 MAX7367/MAX7368/MAX7369 MAX7369 Functional Diagram
PAGE 12
MAX7367/MAX7368/MAX7369 4-Channel I2C Switches/Multiplexer Detailed Description The MAX7367/MAX7368/MAX7369 bidirectional, fourchannel I2C switches/multiplexer expand the main I2C bus up to four extended buses. The MAX7369 is a 1:4 multiplexer that connects the main I2C bus to one channel at a time. The MAX7367/MAX7368 are four-channel switches that can connect the main I2C bus to one or more channels at a time.
PAGE 13
4-Channel I2C Switches/Multiplexer 7 6 5 4 3 2 1 0 X X X X B3 B2 B1 B0 CHANNEL 0 CHANNEL 1 CHANNEL 2 CHANNEL 3 X = DON'T CARE. After a device generates an interrupt on one of the channels, the interrupt input is loaded into the control/interrupt register when a read is performed.
PAGE 14
MAX7367/MAX7368/MAX7369 4-Channel I2C Switches/Multiplexer RESET Input (MAX7367/MAX7368) The MAX7367/MAX7368 feature an active-low RESET input. When RESET is driven low for more than 4ns, the MAX7367/MAX7368 reset the internal register and I2C state machine to their default states, allowing a master to recover from a bus fault condition. Power-On Reset (POR) When power is applied to VDD, internal POR circuitry holds the MAX7367/MAX7368/MAX7369 in a reset state until VDD has reached the VPOR threshold.
PAGE 15
4-Channel I2C Switches/Multiplexer START CONDITION S 1 1 1 Applications Information Repeated Slave Addresses The MAX7367/MAX7368/MAX7369 allow systems to reuse slave addresses individually on each channel of the extended bus. To reuse slave addresses on the extended bus channels of the MAX7367/MAX7368, ensure no more than one channel with a reused address is selected at the same time. Power-Supply Considerations The MAX7367/MAX7368/MAX7369 operate from a +2.3V to +5.5V power-supply voltage.
PAGE 16
MAX7367/MAX7368/MAX7369 4-Channel I2C Switches/Multiplexer Choosing Pullup Resistors I2C requires pullup resistors to provide a logic-high level to data and clock lines. There are tradeoffs between power dissipation and speed, and a compromise must be made in choosing pullup resistor values. Every device connected to the bus introduces some capacitance even when the device is not in operation.
PAGE 17
4-Channel I2C Switches/Multiplexer VCC VDD VDD VDD SDA SDA SD0 SCL SCL SC0 (INT) (INT0) MASTER VDD RESET * MAX7367 MAX7368 MAX7369 SD1 SC1 (INT1) VDD SD2 SC2 (INT2) VDD A0 A1 SD3 A2** SC3 GND (INT3) * FOR MAX7367/MAX7368. ** FOR MAX7368/MAX7369. () FOR MAX7367/MAX7369.
PAGE 18
MAX7367/MAX7368/MAX7369 4-Channel I2C Switches/Multiplexer Package Information For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. 18 PACKAGE TYPE PACKAGE CODE DOCUMENT NO.
PAGE 19
4-Channel I2C Switches/Multiplexer REVISION REVISION 0 10/06 Initial release of the MAX7369 1 12/06 Initial release of the MAX7367/MAX7368 2 2/09 Changed the minimum VIL spec DESCRIPTION PAGES CHANGED — 1 2–5 Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.