Datasheet

MAX7325
I
2
C Port Expander with 8 Push-Pull
and 8 Open-Drain I/Os
2
Maxim Integrated
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, P0–P7 ...................-0.3V to +6V
O8–O15 ........................................................-0.3V to (V+ + 0.3V)
O8–O15 Output Current ...................................................±25mA
P0–P7 Sink Current ......................................................................25mA
SDA Sink Current ........................................................................ 10mA
INT Sink Current..................................................................10mA
Total V+ Current..................................................................50mA
Total GND Current ...........................................................100mA
Continuous Power Dissipation (T
A
= +70°C)
24-Pin QSOP (derate 9.5mW/°C over +70°C)...........761.9mW
24-Pin TQFN (derate 20.8mW/°C over+70°C) ........1666.7mW
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
Soldering Temperature (reflow) .......................................+260°C
DC ELECTRICAL CHARACTERISTICS
(V+ = +1.71V to +5.5V, T
A
= -40°C to +125°C, unless otherwise noted. Typical values are at V+ = +3.3V, T
A
= +25°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Operating Supply Voltage V+ T
A
= -40°C to +125°C 1.71 5.50 V
Power-On-Reset Voltage V
POR
V+ falling 1.6 V
Standby Current
(Interface Idle)
I
STB
SCL and SDA and other
digital inputs at V+
T
A
= -40°C to
+125°C
0.6 1.9 µA
Supply Current
(Interface Running)
I+
f
SCL
= 400kHz; other
digital inputs at V+
T
A
= -40°C to
+125°C
23 55 µA
V+ < 1.8V 0.8 x V+
Input High-Voltage
SDA, SCL, AD0, AD2, RST, P0–P7
V
IH
V+ ≥ 1.8V 0.7 x V+
V
V+ < 1.8V 0.2 x V+
Input Low-Voltage
SDA, SCL, AD0, AD2, RST, P0–P7
V
IL
V+ ≥ 1.8V 0.3 x V+
V
Input Leakage Current
SDA, SCL, AD0, AD2, RST, P0–P7
I
IH
, I
IL
SDA, SCL, AD0, AD2, RST, P0–P7 at V+ or
GND, internal pullup disabled
-0.2 +0.2 µA
Input Capacitance
SDA, SCL, AD0, AD2, RST, P0–P7
10 pF
V+ = +1.71V, I
SINK
= 5mA (QSOP) 90 180
V+ = +1.71V, I
SINK
= 5mA (TQFN) 90 230
V+ = +2.5V, I
SINK
= 10mA (QSOP) 110 210
V+ = +2.5V, I
SINK
= 10mA (TQFN) 110 260
V+ = +3.3V, I
SINK
= 15mA (QSOP) 130 230
V+ = +3.3V, I
SINK
= 15mA (TQFN) 130 280
V+ = +5V, I
SINK
= 20mA (QSOP) 140 250
Output Low Voltage
O8–O15, P0–P7
V
OL
V+ = +5V, I
SINK
= 20mA (TQFN) 140 300
mV
V+ = +1.71V, I
SOURCE
= 2mA V + - 250 V + - 30
V+ = +2.5V, I
SOURCE
= 5mA V + - 360 V + - 70
V+ = +3.3V, I
SOURCE
= 5mA V + - 260 V + - 100
Output High Voltage
O8–O15
V
OH
V+ = +5V, I
SOURCE
= 10mA V + - 360 V + - 120
mV
Output Low-Voltage SDA V
OLSDA
I
SINK
= 6mA 250 mV
Output Low-Voltage INT V
OLINT
I
SINK
= 5mA 130 250 mV
Port Input Pullup Resistor R
PU
25 40 55 kΩ