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
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.
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
Operating Supply Voltage
Power-On Reset Voltage
Standby Current
(Interface Idle)
Supply Current
(Interface Running)
Input High Voltage
SDA, SCL, AD0, AD2,
RST,
I2–I5
Input Low Voltage
SDA, SCL, AD0, AD2,
RST,
I2–I5
Input Leakage Current
SDA, SCL, AD0, AD2,
RST,
I2–I5
Input Capacitance
SDA, SCL, AD0, AD2,
RST,
I2–I5
V+ = +1.71V, I
SINK
= 5mA
Output Low Voltage
O0, O1, O6, O7
V
OL
V+ = +2.5V, I
SINK
= 10mA
V+ = +3.3V, I
SINK
= 15mA
V+ = +5V, I
SINK
= 20mA
V+ = +1.71V, I
SOURCE
= 2mA
Output High Voltage
O0, O1, O6, O7
Output Low Voltage SDA
Output Low Voltage
INT
Port Input Pullup Resistor
V
OH
V+ = +2.5V, I
SOURCE
= 5mA
V+ = +3.3V, I
SOURCE
= 5mA
V+ = +5V, I
SOURCE
= 10mA
V
OLSDA
I
SINK
= 6mA
V
OLINT
R
PU
I
SINK
= 5mA
25
130
40
V+ - 250
V+ - 360
SYMBOL
V
+
V
POR
I
STB
I
+
V
IH
V
IL
I
IH
, I
IL
V+ falling
SCL and SDA and other digital inputs at V+
f
SCL
= 400kHz; other digital inputs at V+
V+ < 1.8V
V+ ≥ 1.8V
V+ < 1.8V
V+ ≥ 1.8V
SDA, SCL, AD0, AD2,
RST,
at V+ or
GND, internal pullup disabled
-0.2
10
90
110
130
140
V+ - 30
V+ - 70
mV
180
210
230
250
mV
0.8 x V+
0.7 x V+
0.2 x V+
0.3 x V+
+0.2
0.6
23
CONDITIONS
MIN
1.71
TYP
MAX
5.50
1.6
1.5
55
UNITS
V
V
µA
µA
V
V
µA
pF
V+ - 260 V+ - 100
V+ - 360 V+ - 120
250
250
55
mV
mV
kW
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Maxim Integrated
│
2
MAX7322
I
2
C Port Expander with
4 Push-Pull Outputs and 4 Inputs
Port and Interrupt
INT
Timing 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
Port Output Data Valid
Port Input Setup Time
Port Input Hold Time
INT
Input Data Valid Time
INT
Reset Delay Time from STOP
INT
Reset Delay Time from
Acknowledge
SYMBOL
t
PPV
t
PSU
t
PH
t
IV
t
IP
t
IR
C
L
≤ 100pF
C
L
≤ 100pF
C
L
≤ 100pF
C
L
≤ 100pF
C
L
≤ 100pF
C
L
≤ 100pF
0
4
4
4
4
CONDITIONS
MIN
TYP
MAX
4
UNITS
µs
µs
µs
µs
µs
µs
Timing 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
Serial-Clock Frequency
Bus Free Time Between a STOP
and a START Condition
Hold Time (Repeated) START
Condition
Repeated START Condition Setup
Time
STOP Condition Setup Time
Data Hold Time
Data Setup Time
SCL Clock Low Period
SCL Clock High Period
Rise Time of Both SDA and SCL
Signals, Receiving
Fall Time of Both SDA and SCL
Signals, Receiving
Fall Time of SDA, Transmitting
Pulse Width of Spike Suppressed
Capacitive Load for Each Bus Line
RST
Pulse Width
RST
Rising to START Condition
Setup Time
SYMBOL
f
SCL
t
BUF
t
HD, STA
t
SU, STA
t
SU, STO
t
HD, DAT
t
SU, DAT
t
LOW
t
HIGH
t
R
t
F
t
F,TX
t
SP
C
b
t
W
t
RST
(Notes 3, 4)
(Notes 3, 4)
(Notes 3, 4)
(Note 5)
(Note 3)
500
1
(Note 2)
100
1.3
0.7
20 +
0.1C
b
20 +
0.1C
b
20 +
0.1C
b
50
300
300
250
1.3
0.6
0.6
0.6
0.9
CONDITIONS
MIN
TYP
MAX
400
UNITS
kHz
µs
µs
µs
µs
µs
ns
µs
µs
ns
ns
ns
ns
400
pF
ns
µs
Note 1:
All parameters are tested at T
A
= +25°C. Specifications over temperature are guaranteed by design.
Note 2:
A master device must provide a hold time of at least 300ns for the SDA signal (referred to V
IL
of the SCL signal) in order to
bridge the undefined region of SCL’s falling edge.
Note 3:
Guaranteed by design.
Note 4:
C
b
= total capacitance of one bus line in pF. t
R
and t
F
measured between 0.3 x V+ and 0.7 x V+ with I
SINK
≤ 6mA.
Note 5:
Input filters on the SDA and SCL inputs suppress noise spikes less than 50ns.
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Maxim Integrated
│
3
MAX7322
I
2
C Port Expander with
4 Push-Pull Outputs and 4 Inputs
Typical Operating Characteristics
(T
A
= +25°C, unless otherwise noted.)
STANDBY CURRENT vs. TEMPERATURE
1.8
STANDBY CURRENT (µA)
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
V+ = +1.71V
V+ = +2.5V
V+ = +3.3V
V+ = +5.0V
f
SCL
= 0kHz
MAX7322 toc01
f
SCL
= 400kHz
V+ = +5.0V
50
SUPPLY CURRENT (µA)
40
30
20
10
0
V+ = +1.71V
V+ = +3.3V
V+ = +2.5V
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
MAX7322 toc03
0.35
OUTPUT VOLTAGE LOW (V)
0.30
0.25
0.20
0.15
0.10
0.05
0
V+ = +1.71V
I
SINK
= 5mA
V+ = +3.3V
I
SINK
= 15mA
V+ = +5.0V
I
SINK
= 20mA
OUTPUT VOLTAGE HIGH (V)
5
4
3
2
1
0
V+ = +5.0V
I
SOURCE
= 10mA
V+ = +3.3V
I
SOURCE
= 5mA
V+ = +2.5V
I
SINK
= 10mA
V+ = +1.71V
I
SOURCE
= 2mA
V+ = +2.5V
I
SOURCE
= 5mA
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (
°
C)
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (
°
C)
Pin Description
PIN
QSOP
1, 3
2
4, 5, 11, 12,
6, 7, 9, 10
8
13
14
15
16
—
TQFN
15, 1
16
2, 3, 9, 10
4, 5, 7, 8
6
11
12
13
14
EP
NAME
AD0, AD2
RST
I2–I5
GND
INT
SCL
SDA
V+
EP
FUNCTION
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).
Reset Input. Active Low. Drive
RST
low to clear the 2-wire interface.
Input Ports. I2 to I5 are CMOS-logic inputs protected to +6V.
Ground
Interrupt Output, Active Low.
INT
is an open-drain output.
I
2
C-Compatible Serial-Clock Input
I
2
C-Compatible Serial-Data I/O
Positive Supply Voltage. Bypass V+ to GND with a ceramic capacitor of at least 0.047µF.
Exposed Pad. Connect exposed pad to GND.
O0, O1, O6, O7 Push-Pull Output Ports
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Maxim Integrated
│
4
MAX7322 toc04
0.40
OUTPUT VOLTAGE LOW
vs. TEMPERATURE
6
OUTPUT VOLTAGE HIGH
vs. TEMPERATURE
MAX7322 toc02
2.0
60
SUPPLY CURRENT vs. TEMPERATURE
MAX7322
I
2
C Port Expander with
4 Push-Pull Outputs and 4 Inputs
Functional Overview
Detailed Description
MAX7319–MAX7329 Family Comparison
The MAX7319–MAX7323 family consists of five pin-
compatible, eight-port expanders. Each version is
optimized for different applications. The MAX7328 and
MAX7329 are industry-standard parts.
The MAX7324–MAX7327 family consists of four pin-
compatible, 16-port expanders that integrate the
func-tions of the MAX7320 and one of either MAX7319,
MAX7321, MAX7322, or MAX7323.
The MAX7322 is a general-purpose port expander
operating from +1.71V to +5.5V supply that provides
four push-pull output ports with 20mA sink, 10mA source
drive capability, and four input ports that are overvoltage
protected to +6V independent of supply voltage. The
MAX7322 is rated to sink a total of 100mA and source a
total of 50mA from all four combined outputs.
The MAX7322 is set to one of 16 I
2
C slave addresses
(0x60 to 0x6F) using address inputs AD2 and AD0, and
is accessed over an I
2
C serial interface up to 400kHz.
The
RST
input clears the serial interface in case of a
bus lockup, terminating any serial transaction to or from
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