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MAX7324AEG+T

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20
General Description
The MAX7324 2-wire serial-interfaced peripheral fea-
tures 16 I/O ports that are divided into eight push-pull
outputs and eight inputs. Each input features selectable
internal pullups, overvoltage protection to +6V, and
transition detection with an interrupt output.
All input ports are continuously monitored for state
changes (transition detection). The interrupt is latched,
allowing detection of transient changes. Any combina-
tion of inputs can be selected using the interrupt mask
to assert the INT output. When the MAX7324 is subse-
quently accessed through the serial interface, any
pending interrupt is cleared.
The 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 MAX7324.
The MAX7324 uses two address inputs with four-level
logic to allow 16 I
2
C slave addresses. The slave
address also enables or disables internal 40kΩ pullups
in groups of four ports.
The MAX7324 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 MAX7324 is available in 24-pin QSOP and TQFN
packages, and is specified over the -40°C to +125°C
automotive temperature range.
Applications
Cell Phones Notebooks
SAN/NAS Automotive
Servers Satellite Radio
Features
♦ 400kHz, +6V-Tolerant I
2
C Serial Interface
♦ +1.71V to +5.5V Operating Voltage
♦ Eight Push-Pull Outputs
♦ Eight 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 Standby Current
♦ -40°C to +125°C Temperature Range
MAX7324
I
2
C Port Expander with Eight Push-Pull Outputs
and Eight Inputs
________________________________________________________________ Maxim Integrated Products 1
19-3785; Rev 0; 10/06
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
PKG
CODE
MAX7324AEG+ -40°C to +125°C 24 QSOP E24-1
MAX7324ATG+ -40°C to +125°C
24 TQFN-EP*
(4mm x 4mm)
T2444-3
Typical Application Circuit and Functional Diagram appear
at end of data sheet.
Selector Guide
PART INPUTS
INTERRUPT
MASK
OPEN-
DRAIN
OUTPUTS
PUSH-PULL
OUTPUTS
MAX7324 8 Yes — 8
MAX7325 Up to 8 — Up to 8 8
MAX7326 4 Yes — 12
MAX7327 Up to 4 — Up to 4 12
Pin Configurations
TQFN (4mm x 4mm)
+
TOP VIEW
MAX7324
19
20
21
22
12 3456
18 17 16 15 14 13
23
24
12
11
10
9
8
7
SCL
V+
SDA
INT
AD2
I0
I1
I2
I3
I4
I5
AD0
O15
O13
O12
O11
RST
O10
O8
O9
GND
I6
I7
O14
EXPOSED PADDLE
+Denotes lead-free package.
*EP = Exposed paddle.
Pin Configurations continued at end of data sheet.
MAX7324
I
2
C Port Expander with Eight Push-Pull Outputs
and Eight 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, I0–I7......................-0.3V to +6V
O8–O15………….…………………………..…-0.3V to (V+ + 0.3V)
O8–O15 Output Current......………………………………...±25mA
SDA Sink Current ............................................................... 10mA
INT Sink Current..................................................................10mA
Total V+ Current..................................................................50mA
Total GND Current ...........................................................100mA
Continuous Power Dissipation
24-Pin QSOP (derate 9.5mW/°C over T
A
= +70°C) ..761.9mW
24-Pin TQFN (derate 20.8mW/°C over
T
A
= +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
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
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+
0.6 1.9 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, I0–I7
V
IH
V+ ≥ 1.8
0.7 x V+
V
V+ < 1.8V
0.2 x V+
Input Low-Voltage
SDA, SCL, AD0, AD2, RST, I0–I7
V
IL
V+ ≥ 1.8
0.3 x V+
V
Input Leakage Current
SDA, SCL, AD0, AD2, RST, I0–I7
I
IH
, I
IL
SDA, SCL, AD0, AD2, RST, I0–I7 at V+ or
GND
-0.2
+0.2
µA
Input Capacitance
SDA, SCL, AD0, AD2, RST, I0–I7
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
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
MAX7324
I
2
C Port Expander with Eight Push-Pull Outputs
and Eight 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) 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+. 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-P18P19-P20

MAX7324AEG+T

Mfr. #:
Buy MAX7324AEG+T
Manufacturer:
Maxim Integrated
Description:
Interface - I/O Expanders I2C Port Expander w/8 P-P Out & 8 In
Lifecycle:
New from this manufacturer.
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