19-0644; Rev 2; 2/09
4-Channel I
2
C Switches/Multiplexer
General Description
The MAX7367/MAX7368/MAX7369 bidirectional, four-
channel I
2
C switches/multiplexer expand the main I
2
C
bus up to four extended buses. The MAX7369 1:4
multiplexer connects the main I
2
C bus to one channel
at a time. The MAX7367/MAX7368 four-channel
switches connect the main I
2
C bus to one or more
channels at a time.
These devices isolate bus loading by extending the I
2
C
bus onto different channels. The MAX7367/MAX7368/
MAX7369 allow more devices to be interconnected to a
master controller and multiple devices with the same
I
2
C address to communicate to a master. The channels
are selected through the main I
2
C bus by writing to the
internal control register of the device.
Any device connected to an I
2
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
2
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.
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
2
C
o
I
2
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
Ordering Information
PART
MAX7367EUP+
MAX7368EUE+
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
PIN-
PACKAGE
20 TSSOP
16 TSSOP
MAX7369EUP+
-40°C to +85°C
20 TSSOP
+Denotes
a lead(Pb)-free/RoHS-compliant package.
Pin Configurations
TOP VIEW
A0 1
A1 2
RESET 3
INT0 4
SD0 5
SC0 6
INT1 7
SD1 8
SC1 9
GND 10
Applications
Servers
RAID
Cellular Phones
Base Stations
PCs
Multimedia Electronics
SAN/NAS
+
20 V
DD
19 SDA
18 SCL
MAX7367
17 INT
16 SC3
15 SD3
14 INT3
13 SC2
12 SD2
11 INT2
TSSOP
Pin Configurations continued 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 Maxim’s website at www.maxim-ic.com.
4-Channel I
2
C Switches/Multiplexer
MAX7367/MAX7368/MAX7369
ABSOLUTE MAXIMUM RATINGS
V
DD
to GND ...........................................................-0.3V to +6.0V
All Other Pins to GND............................................-0.3V to +6.0V
Input Currents
V
DD
...............................................................................100mA
GND ..............................................................................100mA
All Input Pins.................................................................±20mA
Output Current ....................................................................25mA
Continuous Power Dissipation (T
A
= +70°C)
20-Pin TSSOP (derate 11.0mW/°C
above T
A
= +70°C) .................................................. 879.1mW
16-Pin TSSOP (derate 9.4mW/°C
above T
A
= +70°C) .................................................. 754.7mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) ................................ +300°C
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
DD
= 2.3V to 3.6V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at V
DD
= 3.3V, T
A
= +25°C.) (Note 1)
PARAMETER
POWER SUPPLY
Supply Voltage
Standby Current
V
DD
I
STB
No load, all inputs = V
DD
or GND, V
DD
= 3.6V,
all channels disabled
No load, all inputs = V
DD
or GND,
f
SCL
= 100kHz, V
DD
= 3.6V,
all channels disabled
V
DD
rising
2.3
0.1
3.6
1
V
µA
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Supply Current
Power-On-Reset (POR)
Voltage
Power-On-Reset Hysteresis
I
DD
6
30
µA
V
POR
V
HYST
1.4
0.4
2.1
V
V
INPUT SCL, INPUT/OUTPUT SDA
Low-Level Input Voltage
High-Level Input Voltage
Low-Level Output Current
Input Leakage Current
Input Capacitance
V
IL
V
IH
I
OL
I
L
C
I
All inputs = GND
V
OL
= 0.4V
V
OL
= 0.6V
(Note 2)
-0.2
0.7 x
V
DD
3
6
-1
15
+0.3 x
V
DD
5.5
+1
5
30
50
+1
+0.3 x
V
DD
5.5
V
V
mA
µA
pF
SELECT INPUTS A2, A1, A0,
INT0–INT3, RESET
Low-Level Input Voltage
High-Level Input Voltage
Input Leakage Current
Input Capacitance
V
IL
V
IH
I
L
C
I
All inputs = GND
(Note 2)
-0.2
0.7 x
V
DD
-1
V
V
µA
pF
2
_______________________________________________________________________________________
4-Channel I
2
C Switches/Multiplexer
ELECRTICAL CHARACTERISTICS (3.3V SUPPLY) (continued)
(V
DD
= 2.3V to 3.6V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at V
DD
= 3.3V, T
A
= +25°C.) (Note 1)
PARAMETER
PASS GATE
Switch On-Resistance
R
ON
V
DD
= 3V to 3.6V, I
O
= 15mA, V
O
= 0.4V
V
DD
= 2.3V to 2.7V, I
O
= 10mA, V
O
= 0.4V
V
I(SW)
= V
DD
= 3.0V to 3.6V, I
O
= -100µA
Switch Output Voltage
Leakage Current
Input/Output Capacitance
INT
OUTPUT
Low-Level Output Current
High-Level Output Current
I
OL
I
OH
V
OL
= 0.4V
3
1
mA
µA
V
PASS
I
L
C
IO
All inputs = GND
V
I(SW)
= V
DD
= 2.3V to 2.7V, I
O
= -100µA
V
I(SW)
= V
DD
= 2.5V, I
O
= -100µA
-1
6
5
7
1.6
1.1
1.5
+1
µA
pF
16
23
1.9
30
55
2.8
2.0
V
Ω
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
MAX7367/MAX7368/MAX7369
ELECRTICAL CHARACTERISTICS (5V SUPPLY)
(V
DD
= 4.5V to 5.5V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at V
DD
= 5V, T
A
= +25°C.) (Note 1)
PARAMETER
POWER SUPPLY
Supply Voltage
Standby Current
Supply Current
Power-On-Reset Voltage
POR Hysteresis
V
DD
I
STB
I
DD
V
POR
V
HYST
No load, all inputs = V
DD
or GND, V
DD
= 5.5V,
all channels disabled
No load, all inputs = V
DD
or GND, f
SCL
=
100kHz, V
DD
= 5.5V, all channels disabled
V
DD
rising
4.5
0.3
12
1.4
0.4
+0.3 x
V
DD
5.5
30
50
+1
15
+0.3 x
V
DD
5.5
5.5
1
50
2.1
V
µA
µA
V
V
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
INPUT SCL, INPUT/OUTPUT SDA
Low-Level Input Voltage
High-Level Input Voltage
Low-Level Output Current
Input Leakage Current
Input Capacitance
V
IL
V
IH
I
OL
I
L
C
I
All inputs = GND
V
OL
= 0.4V
V
OL
= 0.6V
(Note 2)
-0.2
0.7 x
V
DD
3
6
-1
V
V
mA
µA
pF
SELECT INPUTS A2, A1, A0,
INT0–INT3, RESET
Low-Level Input Voltage
High-Level Input Voltage
V
IL
V
IH
(Note 2)
-0.2
0.7 x
V
DD
V
V
_______________________________________________________________________________________
3
4-Channel I
2
C Switches/Multiplexer
MAX7367/MAX7368/MAX7369
ELECRTICAL CHARACTERISTICS (5V SUPPLY) (continued)
(V
DD
= 4.5V to 5.5V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at V
DD
= 5V, T
A
= +25°C.) (Note 1)
PARAMETER
Input Leakage Current
Input Capacitance
PASS GATE
Switch On-Resistance
Switch Output Voltage
Leakage Current
Input/Output Capacitance
INT
OUTPUT
Low-Level Output Current
High-Level Output Current
I
OL
I
OH
V
OL
= 0.4V
3
1
mA
µA
R
ON
V
PASS
I
L
C
IO
All inputs = GND
V
DD
= 4.5V to 5.5V, I
O
= 15 mA, V
O
= 0.4V
V
I(SW)
= V
DD
, I
O
= -100µA
4
2.6
-1
6
12
3.6
24
4.5
+1
Ω
V
µA
pF
SYMBOL
I
L
C
I
All inputs = GND
CONDITIONS
MIN
-1
5
TYP
MAX
+1
UNITS
µA
pF
TIMING CHARACTERISTICS (Figure 1)
(V
DD
= 2.3V to 5.5V, T
A
= -40°C to +85°C, unless otherwise noted.) (Note 1)
PARAMETER
Propagation Delay from SDA To
SD_ or SCL to SC_
SCL Clock Frequency
Bus Free Time Between a STOP
and START Condition
Hold Time (Repeated) START
Condition (after this period, the
first clock pulse is generated)
Low Period of the SCL Clock
High Period of the SCL Clock
Setup Time for a Repeated START
Condition
Setup Time for STOP Condition
Data Hold Time (Note 4)
Data Setup Time
Rise Time of Both SDA and SCL
Signals
SYMBOL
t
pd
f
SCL
t
BUF
f
SCL
= 100kHz
f
SCL
= 400kHz
f
SCL
= 100kHz
t
HD;STA
f
SCL
= 400kHz
t
LOW
t
HIGH
t
SU;STA
t
SU;STO
t
HD;DAT
t
SU;DAT
f
SCL
= 100kHz
f
SCL
= 400kHz
f
SCL
= 100kHz
f
SCL
= 400kHz
f
SCL
= 100kHz
f
SCL
= 400kHz
f
SCL
= 100kHz
f
SCL
= 400kHz
f
SCL
= 100kHz
f
SCL
= 400kHz
f
SCL
= 100kHz
f
SCL
= 400kHz
f
SCL
= 100kHz
t
r
f
SCL
= 400kHz (Note 5)
20 +
0.1C
b
0.6
4.7
1.3
4.0
0.6
4.7
0.6
4.0
0.6
0
0
250
100
1000
300
ns
3.45
0.9
µs
µs
µs
µs
µs
ns
(Note 3)
0
4.7
1.3
4.0
µs
CONDITIONS
MIN
TYP
MAX
0.3
400
UNITS
ns
kHz
µs
4
_______________________________________________________________________________________
4-Channel I
2
C Switches/Multiplexer
TIMING CHARACTERISTICS (Figure 1) (continued)
(V
DD
= 2.3V to 5.5V, T
A
= -40°C to +85°C, unless otherwise noted.) (Note 1)
PARAMETER
Fall Time of Both SDA and SCL
Signals
Capacitive Load for Each Bus Line
Pulse Width of Spikes Suppressed
Data Valid Time from High to Low
Data Valid Time from Low to High
Data Valid Acknowledge
INT
(Figure 2)
INT_
to
INT
Active Valid Time
INT_
to
INT
Inactive Delay Time
Low-Level, Pulse-Width Rejection
or
INT_
Inputs
High-Level, Pulse-Width Rejection
or
INT_
Inputs
RESET
(Figure 3)
Pulse-Width Low Reset
Reset Time (SDA Clear)
Recovery to Start
t
WL(RST)
t
RST
t
REC;STA
500
0
4
ns
ns
ns
t
IV
t
IR
t
W(REJ)L
t
W(REJ)H
1
0.5
4
2
µs
µs
µs
µs
SYMBOL
t
f
C
b
t
SP
t
VD;DATL
t
VD;DATH
t
VD;ACK
(Note 7)
(Note 7)
CONDITIONS
f
SCL
= 100kHz
f
SCL
= 400kHz (Note 5)
(Note 6)
20 +
0.1C
b
MIN
TYP
MAX
300
300
400
50
1
0.6
1
ns
pF
ns
µs
µs
µs
UNITS
MAX7367/MAX7368/MAX7369
Note 1:
Note 2:
Note 3:
Note 4:
All parameters are production tested at T
A
= +25°C and guaranteed by design over the specified temperature range.
Minimum value is not production tested. Guaranteed by design.
Pass gate propagation delay is calculated from 20Ω (typ) R
ON
and the 15pF load capacitance. Not production tested.
A master device must provide a hold time of at least 300ns for the SDA signal (referred to the V
IL
of the SCL) in order to
bridge the undefined region of SCL’s falling edge.
Note 5:
Cb = total capacitance of one bus line in pF.
Note 6:
Guaranteed by design.
Note 7:
Measurements taken with a 1kΩ pullup resistor and 50pF load.
SDA
t
f
t
LOW
t
r
t
SU;DAT
t
f
t
HD;STA
t
SP
t
r
t
BUF
SCL
t
HD;STA
S
t
HIGH
t
SU;STA
S
r
t
SU;STO
P
S
t
HD;DAT
Figure 1. 2-Wire Serial-Interface Timing Diagram
_______________________________________________________________________________________
5
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