
MAX7322
I2C Port Expander with
4 Push-Pull Outputs and 4 Inputs
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
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.
(All voltages referenced to GND.)
Supply Voltage V+....................................................-0.3V to +6V
SCL, SDA, AD0, AD2, RST, INT, I2–I5......................-0.3V to +6V
O0, O1, O6, O7 .................................................-0.3 to V+ + 0.3V
O0, O1, O6, O7 Output Current........................................±25mA
SDA Sink Current ............................................................... 10mA
INT Sink Current..................................................................10mA
Total V+ Current..................................................................50mA
Total GND Current ...........................................................100mA
Continuous Power Dissipation (TA = +70°C)
16-Pin QSOP (derate 8.3mW/°C above +70°C)...........667mW
16-Pin TQFN (derate 15.6mW/°C above +70°C) .......1250mW
Operating Temperature Range .........................-40°C to +125°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
DC ELECTRICAL CHARACTERISTICS
(V+ = +1.71V to +5.5V, TA = -40°C to +125°C, unless otherwise noted. Typical values are at V+ = +3.3V, TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Operating Supply Voltage
V+
1.71
5.50
V
Power-On Reset Voltage
VPOR
V+ falling
1.6
V
Standby Current
(Interface Idle)
ISTB
SCL and SDA and other digital inputs at
V+
0.6
1.5
A
Supply Current
(Interface Running)
I+
fSCL = 400kHz; other digital inputs at V+
23
55
A
V+ < 1.8V
0.8 x V+
Input High Voltage
SDA, SCL, AD0, AD2,
RST, I2–I5
VIH
V+
≥ 1.8V
0.7 x V+
V
V+ < 1.8V
0.2 x V+
Input Low Voltage
SDA, SCL, AD0, AD2,
RST, I2–I5
VIL
V+
≥ 1.8V
0.3 x V+
V
Input Leakage Current
SDA, SCL, AD0, AD2,
RST, I2–I5
IIH, IIL
SDA, SCL, AD0, AD2,
RST, at V+ or
GND, internal pullup disabled
-0.2
+0.2
A
Input Capacitance
SDA, SCL, AD0, AD2,
RST, I2–I5
10
pF
V+ = +1.71V, ISINK = 5mA
90
180
V+ = +2.5V, ISINK = 10mA
110
210
V+ = +3.3V, ISINK = 15mA
130
230
Output Low Voltage
O0, O1, O6, O7
VOL
V+ = +5V, ISINK = 20mA
140
250
mV
V+ = +1.71V, ISOURCE = 2mA
V+ - 250
V+ - 30
V+ = +2.5V, ISOURCE = 5mA
V+ - 360 V+ - 70
V+ = +3.3V, ISOURCE = 5mA
V+ - 260
V+ - 100
Output High Voltage
O0, O1, O6, O7
VOH
V+ = +5V, ISOURCE = 10mA
V+ - 360
V+ - 120
mV
Output Low Voltage SDA
VOLSDA
ISINK = 6mA
250
mV
Output Low Voltage
INT
VOLINT
ISINK = 5mA
130
250
mV
Port Input Pullup Resistor
RPU
25
40
55
k
Ω