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MAX7327AATG+T

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21
General Description
The MAX7327, a 2-wire serial-interfaced peripheral,
features 12 push-pull outputs and four configurable
open-drain I/O ports with selectable internal pullups
and transition detection. Ports are overvoltage protect-
ed to +6V, independent of supply voltage.
The four I/O ports configured as inputs are continuously
monitored for state changes (transition detection). State
changes are indicated by the open-drain, +6V-tolerant
INT output. The interrupt is latched, detecting transient
changes. When the MAX7327 is subsequently accessed
through the serial interface, any pending interrupt is
cleared. The 12 push-pull and the four open-drain out-
puts are rated to sink 20mA, and are capable of driving
LEDs. The RST input clears the serial interface, terminat-
ing any I
2
C communication to or from the MAX7327.
The MAX7327 uses two address inputs with four-level
logic to allow 16 I
2
C slave addresses. The slave
address also determines the power-up logic state for
the I/O ports, and enables or disables internal 40kΩ
pullups in groups of two ports.
The MAX7327 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 MAX7327 is available in the 24-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 Operating Voltage
♦ 12 Push-Pull Output Ports, Rated at 20mA Sink
Current
♦ 4 Open-Drain I/O Ports, Rated at 20mA Sink Current
♦ I/O Ports are Overvoltage Protected to +6V
♦ Selectable I/O Port Power-Up Default Logic States
♦ Transient Changes are Latched, Allowing Detection
Between Read Operations
♦ INT Output Alerts Changes on Inputs
♦ AD0 and AD2 Inputs Select from 16 Slave
Addresses
♦ Low 0.6µA (typ) Standby Current
♦ -40°C to +125°C Temperature Range
MAX7327
I
2
C Port Expander with 12 Push-Pull
Outputs and 4 Open-Drain I/Os
________________________________________________________________ Maxim Integrated Products 1
19-3805; Rev 0; 8/06
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
MAX7327AEG+
-40°C to +125°C
24 QSOP
E24-1
MAX7327ATG+
-40°C to +125°C
24 TQFN - E P **
( 4m m x 4m m )
T2444-3
MAX7327AATG+
-40°C to +125°C
24 TQFN - E P **
( 3.5m m x 3.5m m )
T243A3-1
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
Cell Phones
SAN/NAS
Servers
Notebooks
Satellite Radio
Automotive
+Denotes lead-free package.
**EP = Exposed pad.
Pin Configurations
Pin Configurations continued at end of data sheet.
MAX7327
I
2
C Port Expander with 12 Push-Pull
Outputs and 4 Open-Drain I/Os
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, P2–P5 ..................-0.3V to +6V
O0, O1, O6–O15 .............................................-0.3V to V
+
+ 0.3V
O0, O1, O6–O15 Output Current .....................................±25mA
P2–P5 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
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, P2–P5
V
IH
V+ ≥ 1.8 V 0.7 x V+
V
V+ < 1.8V 0.2 x V+
Input Low-Voltage
SDA, SCL, AD0, AD2, RST, P2–P5
V
IL
V+ ≥ 1.8 V 0.3 x V+
V
Input Leakage Current
SDA, SCL, AD0, AD2, RST, P2–P5
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, P2–P5
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
O0, O1, O6–O15, P2–P5
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
MAX7327
I
2
C Port Expander with 12 Push-Pull
Outputs and 4 Open-Drain I/Os
_______________________________________________________________________________________ 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 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-P18P19-P21

MAX7327AATG+T

Mfr. #:
Buy MAX7327AATG+T
Manufacturer:
Maxim Integrated
Description:
Interface - I/O Expanders I2C PORT EXP&ER w/ 12 PUSH-PULL OUTPUTS
Lifecycle:
New from this manufacturer.
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