Datasheet

(T
A
= +25°C, unless otherwise noted.)
PIN
NAME FUNCTION
QSOP TQFN
1, 3 15, 1 AD0, AD2
Address Inputs. Select device slave address with AD0 and AD2. Connect AD0 and AD2
to either GND, V+, SCL, or SDA to give four logic combinations (see Table 2).
2 16 RST Reset Input. Active Low. Drive RST low to clear the 2-wire interface.
4, 5, 11, 12, 2, 3, 9, 10 O0, O1, O6, O7 Push-Pull Output Ports
6, 7, 9, 10 4, 5, 7, 8 I2–I5 Input Ports. I2 to I5 are CMOS-logic inputs protected to +6V.
8 6 GND Ground
13 11 INT Interrupt Output, Active Low. INT is an open-drain output.
14 12 SCL I
2
C-Compatible Serial-Clock Input
15 13 SDA I
2
C-Compatible Serial-Data I/O
16 14 V+ Positive Supply Voltage. Bypass V+ to GND with a ceramic capacitor of at least 0.047µF.
— EP EP Exposed Pad. Connect exposed pad to GND.
OUTPUT VOLTAGE HIGH
vs. TEMPERATURE
TEMPERATURE (°C)
OUTPUT VOLTAGE HIGH (V)
MAX7322 toc04
-40 -25 -10 5 20 35 50 65 80 95 110 125
0
1
2
3
4
5
6
V+ = +3.3V
I
SOURCE
= 5mA
V+ = +5.0V
I
SOURCE
= 10mA
V+ = +2.5V
I
SOURCE
= 5mA
V+ = +1.71V
I
SOURCE
= 2mA
OUTPUT VOLTAGE LOW
vs. TEMPERATURE
TEMPERATURE (°C)
OUTPUT VOLTAGE LOW (V)
MAX7322 toc03
-40 -25 -10 5 20 35 50 65 80 95 110 125
0
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0.40
V+ = +3.3V
I
SINK
= 15mA
V+ = +5.0V
I
SINK
= 20mA
V+ = +2.5V
I
SINK
= 10mA
V+ = +1.71V
I
SINK
= 5mA
0
20
10
40
30
50
60
-40 -10 5 20-25 35 50 65 80 95 110 125
SUPPLY CURRENT vs. TEMPERATURE
MAX7322 toc02
TEMPERATURE (°C)
SUPPLY CURRENT (µA)
V+ = +3.3V
V+ = +5.0V
V+ = +1.71V
V+ = +2.5V
f
SCL
= 400kHz
0
0.4
0.2
1.0
0.8
0.6
1.2
1.4
1.8
1.6
2.0
-40 -10 5-25 20 35 50 65 80 95 110 125
STANDBY CURRENT vs. TEMPERATURE
MAX7322 toc01
TEMPERATURE (°C)
STANDBY CURRENT (µA)
V+ = +3.3V
V+ = +2.5V
V+ = +5.0V
V+ = +1.71V
f
SCL
= 0kHz
Maxim Integrated │ 4
www.maximintegrated.com
MAX7322 I
2
C Port Expander with
4 Push-Pull Outputs and 4 Inputs
Pin Description
Typical Operating Characteristics