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MAX7322ATE+T

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18
General Description
The MAX7322 2-wire serial-interfaced peripheral features
four push-pull outputs and four input ports with selectable
internal pullups. Input ports are overvoltage protected to
+6V and feature transition detection with interrupt output.
The four input ports are continuously monitored for state
changes (transition detection). The interrupt is latched,
allowing detection of transient changes. Any combination
of inputs can be selected using the interrupt mask to
assert the open-drain INT output. When the MAX7322 is
subsequently accessed through the serial interface, any
pending interrupt is cleared.
The four push-pull outputs are rated to sink 20mA, and
are capable of driving LEDs.
The RST input clears the serial interface, terminating any
I
2
C communication to or from the MAX7322.
The MAX7322 uses two address inputs with four-level
logic to allow 16 I
2
C slave addresses. The slave address
also sets the power-up default logic state for the four out-
put ports, and enables or disables internal 40kΩ pullups
for the input ports.
The MAX7322 is one device in a family of pin-compatible
port expanders with a choice of input ports, open-drain
I/O ports, and push-pull output ports (see Table 1).
The MAX7322 is available in 16-pin QSOP and TQFN
packages, and is specified over the -40°C to +125°C
automotive temperature range.
Applications
Features
♦ 400kHz I
2
C Serial Interface
♦ +1.71V to +5.5V Operation Voltage
♦ 4 Push-Pull Output Ports Rated at 20mA Sink
Current
♦ 4 Input Ports with Maskable, Latching Transition
Detection
♦ Input Ports are Overvoltage Protected to +6V
♦ Transient Changes are Latched, Allowing
Detection Between Read Operations
♦ INT Output Alerts Change on Any Selection of
Inputs
♦ AD0 and AD2 Inputs Select from 16 Slave
Addresses
♦ Low 0.6µA (typ) Standby Current
♦ -40°C to +125°C Operating Temperature Range
MAX7322
I
2
C Port Expander with
4 Push-Pull Outputs and 4 Inputs
________________________________________________________________ Maxim Integrated Products 1
19-3787; Rev 1; 9/06
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
EVALUATION KIT
AVAILABLE
Ordering Information
PART
TEMP
RANGE
PIN-
PACKAGE
TOP
MARK
PKG
CODE
MAX7322AEE+
-40°C to
+125°C
16 QSOP — E16-4
MAX7322ATE+
-40°C to
+125°C
16 TQFN-EP*
(3mm x 3mm)
ADD T1633-4
Typical Application Circuit and Functional Diagram appear
at end of data sheet.
Cell Phones
SAN/NAS
Servers
Notebooks
Satellite Radio
Automotive
Selector Guide
PART INPUTS
INTERRUPT
MASK
OPEN-
DRAIN
OUTPUTS
PUSH-PULL
OUTPUTS
MAX7319 8 Yes — —
MAX7320 — — — 8
MAX7321 Up to 8 — Up to 8 —
MAX7322 4 Yes — 4
MAX7323 Up to 4 — Up to 4 4
MAX7328 Up to 8 — Up to 8 —
MAX7329 Up to 8 — Up to 8 —
+Denotes lead-free package.
*EP = Exposed paddle.
15
16
14
13
5
6
7
O1
I2
8
AD2
O7
O6
SCL
13
V+
4
12 10 9
AD0
RST
I5
I4
GND
I3
MAX7322
O0 INT
2
11
SDA
TQFN
(3mm x 3mm)
TOP VIEW
*EP
+
Pin Configurations
Pin Configurations continued at end of data sheet.
MAX7322
I
2
C 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 (T
A
= +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, 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+ 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+
0.6 1.5 µA
Supply Current
(Interface Running)
I
+
f
SCL
= 400kHz; other digital inputs at V+ 23 55 µA
V+
<
1.8V 0.8 x V+
Input High Voltage
SDA, SCL, AD0, AD2, RST, I2–I5
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, I2–I5
V
IL
V+ ≥ 1.8V 0.3 x V+
V
Input Leakage Current
SDA, SCL, AD0, AD2, RST, I2–I5
I
IH
, I
IL
SDA, SCL, AD0, AD2, RST, at V+ or
GND, internal pullup disabled
-0.2 +0.2 µA
Input Capacitance
SDA, SCL, AD0, AD2, RST, I2–I5
10 pF
V+ = +1.71V, I
SINK
= 5mA 90 180
V+ = +2.5V, I
SINK
= 10mA 110 210
V+ = +3.3V, I
SINK
= 15mA 130 230
Output Low Voltage
O0, O1, O6, O7
V
OL
V+
= +5V, I
SINK
= 20mA 140 250
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
O0, O1, O6, O7
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
MAX7322
I
2
C Port Expander with
4 Push-Pull Outputs and 4 Inputs
_______________________________________________________________________________________ 3
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 SYMBOL CONDITIONS MIN TYP MAX UNITS
Port Output Data Valid t
PPV
C
L
≤ 100pF 4 µs
Port Input Setup Time t
PSU
C
L
≤ 100pF 0 µs
Port Input Hold Time t
PH
C
L
≤ 100pF 4 µs
INT Input Data Valid Time t
IV
C
L
≤ 100pF 4 µs
INT Reset Delay Time from STOP t
IP
C
L
≤ 100pF 4 µs
INT Reset Delay Time from
Acknowledge
t
IR
C
L
≤ 100pF 4 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 SYMBOL CONDITIONS MIN TYP MAX UNITS
Serial Clock Frequency f
SCL
400 kHz
Bus Free Time Between a STOP
and a START Condition
t
BUF
1.3 µs
Hold Time (Repeated) START
Condition
t
HD
,
STA
0.6 µs
Repeated START Condition
Setup Time
t
SU
,
STA
0.6 µs
STOP Condition Setup Time t
SU
,
STO
0.6 µs
Data Hold Time t
HD
,
DAT
(Note 2) 0.9 µs
Data Setup Time t
SU
,
DAT
100 ns
SCL Clock Low Period t
LOW
1.3 µs
SCL Clock High Period t
HIGH
0.7 µs
Rise Time of Both SDA and SCL
Signals, Receiving
t
R
(Notes 3, 4)
20 +
0.1C
b
300 ns
Fall Time of Both SDA and SCL
Signals, Receiving
t
F
(Notes 3, 4)
20 +
0.1C
b
300 ns
Fall Time of SDA, Transmitting t
F,TX
(Notes 3, 4)
20 +
0.1C
b
250 ns
Pulse Width of Spike Suppressed t
SP
(Note 5) 50 ns
Capacitive Load for Each Bus
Line
C
b
(Note 3) 400 pF
RST Pulse Width t
W
500 ns
RST Rising to START Condition
Setup Time
t
RST
1µs
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.
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18

MAX7322ATE+T

Mfr. #:
Buy MAX7322ATE+T
Manufacturer:
Maxim Integrated
Description:
Interface - I/O Expanders I2C Port Expander w/4 P-P Out & 4 In
Lifecycle:
New from this manufacturer.
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