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Maxim Integrated Semiconductor Electronic Components Datasheet

MAX1608 Datasheet

Octal SMBus-to-Parallel I/O Expanders

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19-1639; Rev 0; 1/00
Octal SMBus-to-Parallel I/O Expanders
General Description
The MAX1608/MAX1609 provide remote input/output (I/O)
expansion through an SMBus™ 2-wire serial interface.
Each device has eight high-voltage open-drain outputs
that double as TTL-level logic inputs, providing continuous
bidirectional capabilities. The open-drain outputs tailor the
MAX1608/MAX1609 for use in load-switching and other
level-shifting applications as well as general-purpose I/O
applications.
Two complete sets of registers allow the device and its
outputs to be toggled between two states using the
SMBSUS input, without the inherent latency of reprogram-
ming outputs over the serial bus. The eight I/O lines are
continuously monitored and can be used as inputs. Each
line can generate asynchronous maskable interrupts on
the falling edge, the rising edge, or both edges.
For load-switching applications, the MAX1608 is designed
to drive N-channel MOSFETs, and its outputs are low
upon power-up; the MAX1609 is designed to drive P-
channel MOSFETs, and its I/Os are high impedance upon
power-up. Other features of both devices include thermal-
overload and output-overcurrent protection, ultra-low sup-
ply current, and a wide +2.7V to +5.5V supply range. The
MAX1608/MAX1609 are available in space-saving 16-pin
QSOP packages.
Applications
Parallel I/O Expansion
Power-Plane Switching
Notebook and Desktop Computers
Servers and Workstations
Notebook Docking Stations
Industrial Equipment
Pin Configuration
TOP VIEW
IO0 1
IO1 2
IO2 3
IO3 4
IO4 5
IO5 6
IO6 7
IO7 8
MAX1608
MAX1609
QSOP
SMBus is a trademark of Intel Corp.
16 V+
15 SMBSUS
14 SMBCLK
13 ALERT
12 SMBDATA
11 ADD1
10 ADD0
9 GND
Features
o Serial-to-Parallel or Parallel-to-Serial Conversions
o 8 General-Purpose Digital I/O Pins
(withstand +28V)
o SMBus 2-Wire Serial Interface
o Supports SMBSUS Asynchronous Suspend
o 9 Pin-Selectable Slave Addresses
o Outputs High Impedance on Power-Up (MAX1609)
o Outputs Low on Power-Up (MAX1608)
o 2.5µA Supply Current
o +2.7V to +5.5V Supply Range
o 16-Pin QSOP Package
PART
MAX1608EEE
MAX1609EEE
Ordering Information
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
16 QSOP
16 QSOP
Typical Operating Circuits
+2.7V TO +5.5V
V+
MAX1609
SMBUS
TO/
FROM
HOST
ALERT
SMBDATA
SMBCLK
SMBSUS
ADD1
ADD GND
IO1
IO2
IO3
IO7
100k
0.1µF
100k
100k
P-CH
LOAD1
LOAD2
LOAD3
Typical Operating Circuits continued at end of data sheet.
________________________________________________________________ Maxim Integrated Products 1
For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.


Maxim Integrated Semiconductor Electronic Components Datasheet

MAX1608 Datasheet

Octal SMBus-to-Parallel I/O Expanders

No Preview Available !

Octal SMBus-to-Parallel I/O Expanders
ABSOLUTE MAXIMUM RATINGS
V+ to GND ................................................................-0.3V to +6V
IO_ to GND .............................................................-0.3V to +30V
IO_ Sink Current..................................................-1mA to +50mA
SMBCLK, SMBDATA, SMBSUS
and ALERT to GND .............................................-0.3V to +6V
ADD_ to GND ...............................................-0.3V to (V+ + 0.3V)
SMBDATA and ALERT Sink Current ...................-1mA to +50mA
Continuous Power Dissipation (TA = +70°C)
16-Pin QSOP (derate 8.3mW/°C above +70°C)...........667mW
Operating Temperature Range ...........................-40°C to +85°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.
ELECTRICAL CHARACTERISTICS
(V+ = +2.7V to +5.5V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
CONDITIONS
MIN TYP
Supply Voltage Range
2.7
Static, outputs in any combination of on or off
states up to 28V
7
Supply Current (Note 2)
Static, all IOs low or pulled to 0
3.5
SMBus interface operating,
clock frequency = 100kHz
7
POR Threshold Voltage
Falling edge of V+
1.2 1.8
I/O Sink Current
IO_ forced to 0.4V
IO_ forced to 1.0V, V+ = 4.5V
2
8 13
I/O Current Limit
IO_, V+ = 4.5V
15 25
I/O Leakage Current
IO_ forced to 28V
0.5
Propagation Delay
SMBCLK to IO_
SMBSUS to IO_
IO_ to ALERT
IO_ Data Set-Up Time
10% or 90% of I/O to 10% of SMBCLK (Note 3) 10
IO_ Data Hold Time
SMBus Logic Input Voltage Range
Logic Input High Voltage
Logic Input Low Voltage
SMBus Output Low Sink Current
ALERT Output Low Sink Current
ALERT Output High Leakage Current
Thermal Shutdown
Sample Address Input Impedance
Logic Input Current
SMBus Input Capacitance
(Note 3)
SMBSUS, SMBCLK, SMBDATA (Note 2)
IO_, SMBSUS, SMBCLK, SMBDATA
IO_, SMBSUS, SMBCLK, SMBDATA
SMBDATA forced to 0.6V
ALERT forced to 0.4V
ALERT forced to 5.5V
10°C typical hysteresis
ADD_ during address sampling (POR, SPOR,
and RAP) to V+ and GND (Note 4)
SMBDATA, SMBCLK, SMBUS, ADD_
SMBCLK, SMBDATA
3
0
2.1
6
1
-1
140
20
5
MAX UNITS
5.5 V
18
9 µA
2.5 V
mA
50 mA
2 µA
2.5
1 µs
10
µs
µs
5.5 V
V
0.8 V
mA
mA
1 µA
°C
k
1 µA
pF
2 _______________________________________________________________________________________


Part Number MAX1608
Description Octal SMBus-to-Parallel I/O Expanders
Maker Maxim
Total Page 16 Pages
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