MAX7301AAX ,4-Wire-Interfaced, 2.5V to 5.5V, 20-Port and 28-Port I/O ExpanderApplicationsWhite GoodsTypical Operating CircuitAutomotiveGaming Machines 3V36 32V+ P4 I/O 4Industr ..
MAX7301AAX ,4-Wire-Interfaced, 2.5V to 5.5V, 20-Port and 28-Port I/O ExpanderFeaturesThe MAX7301 compact, serial-interfaced I/O expander♦ High-Speed 26MHz SPI-/QSPI-™/MICROWIRE ..
MAX7301AAX+ ,4-Wire-Interfaced, 2.5V to 5.5V, 20-Port and 28-Port I/O ExpanderApplications MAX7301 P10 I/O 1035 11CHIP SELECT P11 I/O 11CS● White Goods33 6CLOCK IN SCLK P12I/O 1 ..
MAX7301AAX+ ,4-Wire-Interfaced, 2.5V to 5.5V, 20-Port and 28-Port I/O ExpanderGeneral Description Beneits and
MAX7301AAX+T ,4-Wire-Interfaced, 2.5V to 5.5V, 20-Port and 28-Port I/O ExpanderElectrical Characteristics(Typical Operating Circuit, V+ = 2.5V to 5.5V, T = T to T , unless otherw ..
MAX7301AAX-T ,4-Wire-Interfaced, 2.5V to 5.5V, 20-Port and 28-Port I/O ExpanderElectrical Characteristics(Typical Operating Circuit, V+ = 2.5V to 5.5V, T = T to T , unless otherw ..
MB4M ,MINIATURE GLASS PASSIVATED SINGLE-PHASE BRIDGE RECTIFIERapplications0.205 (5.21)0.179 (4.55)0.195 (4.95)Mechanical Data0.049 (1.24)0.039 (0.99)0.106 (2.70) ..
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MB501 , TECHNICAL SPECIFICATIONS OF SINGLE-PHASE SILICON BRIDGE RECTIFIER
MB501 , TECHNICAL SPECIFICATIONS OF SINGLE-PHASE SILICON BRIDGE RECTIFIER
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MAX7301AAX
4-Wire-Interfaced, 2.5V to 5.5V, 20-Port and 28-Port I/O Expander
General DescriptionThe MAX7301 compact, serial-interfaced I/O expander
(or general-purpose I/O (GPIO) peripheral) provides
microprocessors with up to 28 ports. Each port is indi-
vidually user configurable to either a logic input or logic
output.
Each port can be configured either as a push-pull logic
output capable of sinking 10mA and sourcing 4.5mA,
or a Schmitt logic input with optional internal pullup.
Seven ports feature configurable transition detection
logic, which generates an interrupt upon change of port
logic level. The MAX7301 is controlled through an
SPI™-compatible 4-wire serial interface.
The MAX7301AAX and MAX7301AGL have 28 ports and
are available in 36-pin SSOP and 40-pin QFN packages,
respectively. The MAX7301AAI and MAX7301ANI have
20 ports and are available in 28-pin SSOP and 28-pin DIP
packages, respectively.
For a 2-wire interfaced version, refer to the MAX7300
data sheet.
For a pin-compatible port expander with additional
24mA constant-current LED drive capability, refer to the
MAX6957 data sheet.
ApplicationsWhite Goods
Automotive
Gaming Machines
Industrial Controllers
System Monitoring
FeaturesHigh-Speed 26MHz SPI-/QSPI-™/MICROWIRE™-
Compatible Serial Interface2.5V to 5.5V Operation-40°C to +125°C Temperature Range20 or 28 I/O Ports, Each Configurable as
Push-Pull Logic Output
Schmitt Logic Input
Schmitt Logic Input with Internal Pullup11µA (max) Shutdown CurrentLogic Transition Detection for Seven I/O Ports
MAX7301
4-Wire-Interfaced, 2.5V to 5.5V, 20-Port and
28-Port I/O Expander 19-2438; Rev 3; 10/03
Pin Configurations appear at end of data sheet.
Ordering InformationSPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
ypical Operating Circuit
MAX7301
4-Wire-Interfaced, 2.5V to 5.5V, 20-Port and
28-Port I/O Expander
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.
Voltage (with respect to GND) .............................................................................-0.3V to +6V
All Other pins................................................-0.3V to (V+ + 0.3V)
P4–P31 Current ................................................................±30mA
GND Current.....................................................................800mA
Continuous Power Dissipation (TA= +70°C)
28-Pin PDIP (derate 20.8mW/°C above +70°C).........1667mW
28-Pin SSOP (derate 9.5mW/°C above +70°C)...........762mW
36-Pin SSOP (derate 11.8mW/°C above +70°C).........941mW
40-Pin QFN (derate 23.25mW/°C above +70°C).......1860mW
Operating Temperature Range
(TMIN, TMAX)..................................................-40°C to +125°C
Junction Temperature......................................................+150°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10s).................................+300°C
ELECTRICAL CHARACTERISTICS
(Typical Operating Circuit, V+ = 2.5V to 5.5V, TA= TMINto TMAX, unless otherwise noted.) (Note 1)
MAX7301
4-Wire-Interfaced, 2.5V to 5.5V, 20-Port and
28-Port I/O Expander
Note 1:All parameters tested at TA= +25°C. Specifications over temperature are guaranteed by design.
Note 2:Guaranteed by design.
ELECTRICAL CHARACTERISTICS (continued)
TIMING CHARACTERISTICS (Figure 3)
MAX7301
4-Wire-Interfaced, 2.5V to 5.5V, 20-Port and
28-Port I/O Expander
OPERATING SUPPLY CURRENT
vs. TEMPERATURE
MAX7301 toc01
TEMPERATURE (°C)
SUPPLY CURRENT (mA)
SHUTDOWN SUPPLY CURRENT
vs. TEMPERATUREMAX7301 toc02
TEMPERATURE (°C)
SUPPLY CURRENT (
OPERATING SUPPLY CURRENT
vs. V+ (OUTPUTS UNLOADED)
MAX7301 toc03
V+ (V)
SUPPLY CURRRENT (mA)
GPO SINK CURRENT vs. TEMPERATURE
(OUTPUT = 0)
MAX7301 toc04
TEMPERATURE (°C)
PORT SINK CURRENT (mA)
GPO SHORT-CIRCUIT CURRENT
vs. TEMPERATURE
MAX7301 toc07
TEMPERATURE (°C)
PORT CURRENT (mA)
GPO SOURCE CURRENT vs. TEMPERATURE
(OUTPUT = 1)
MAX7301 toc05
TEMPERATURE (°C)
PORT SOURCE CURRENT (mA)
GPI PULLUP CURRENT
vs. TEMPERATURE
MAX7301 toc06
TEMPERATURE (°C)
PULLUP CURRENT (
__________________________________________Typical Operating Characteristics
(TA = +25°C, unless otherwise noted.)
Detailed DescriptionThe MAX7301 GPIO peripheral provides up to 28 I/O
ports, P4 to P31, controlled through an SPI-compatible
serial interface. The ports can be configured to any
combination of logic inputs and logic outputs, and
default to logic inputs on power-up.
Figure 1 is the MAX7301 functional diagram. Any I/O
port can be configured as a push-pull output (sinking
10mA, sourcing 4.5mA), or a Schmitt-trigger logic
input. Each input has an individually selectable internal
pullup resistor. Additionally, transition detection allows
seven ports (P24 through P30) to be monitored in any
maskable combination for changes in their logic status.
A detected transition is flagged through an interrupt pin
(port P31).
The port configuration registers set the 28 ports, P4 to
P31, individually as GPIO. A pair of bits in registers
0x09 through 0x0F sets each port’s configuration
(Tables 1 and 2).
The 36-pin MAX7301AAX has 28 ports, P4 to P31. The
28-pin MAX7301ANI and MAX7301AAI make only 20
ports available—P12 to P31. The eight unused ports
should be configured as outputs on power-up by writ-
ing 0x55 to registers 0x09 and 0x0A. If this is not done,
the eight unused ports remain as floating inputs and
quiescent supply current rises, although there is no
damage to the part.
Register Control of I/O Ports
Across Multiple DriversThe MAX7301 offers 20 or 28 I/O ports, depending on
package choice.
Two addressing methods are available. Any single port
(bit) can be written (set/cleared) at once; or, any
sequence of eight ports can be written (set/cleared) in
any combination at once. There are no boundaries; it is
equally acceptable to write P0 through P7, P1 through
P8, or P31 through P38 (P32 through P38 are nonexis-
tent, so the instructions to these bits are ignored).
ShutdownWhen the MAX7301 is in shutdown mode, all ports are
forced to inputs (which can be read), and the pullup
current sources are turned off. Data in the port and
control registers remain unaltered so port configuration
and output levels are restored when the MAX7301 is
taken out of shutdown. The display driver can still be
programmed while in shutdown mode. For minimum
supply current in shutdown mode, logic inputs should
be at GND or V+ potential. Shutdown mode is exited by
setting the S bit in the configuration register (Table 6).
MAX7301
4-Wire-Interfaced, 2.5V to 5.5V, 20-Port and
28-Port I/O Expander
