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Maxim Integrated Semiconductor Electronic Components Datasheet

MAX1663 Datasheet

Serial-to-Parallel/Parallel-to-Serial Converters and Load-Switch Controllers with SMBus Interface

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19-1306; Rev 0; 10/97
EVALUATION KIT
AVAILABLE
Serial-to-Parallel/Parallel-to-Serial Converters and
Load-Switch Controllers with SMBus Interface
________________General Description
The MAX1661/MAX1662/MAX1663 serial-to-parallel/
parallel-to-serial converters are intended to control external
power MOSFETs in power-plane switching applications.
These small, low-cost devices can be used on a system
motherboard to control point-of-load switching from a 2-
wire SMBus™ serial interface. Each device has three high-
voltage open-drain outputs that double as TTL-level logic
inputs, giving them bidirectional capabilities. The I/O pins
can withstand +28V, so they can control battery voltage-
distribution switches in notebook computers.
The MAX1661 is intended for driving N-channel MOSFETs
and its outputs are low upon power-up. The MAX1662/
MAX1663 are intended for P-channel MOSFETs, and their
outputs are high-impedance upon power-up. This ensures
that the MOSFETs are off at power-up, so the system can
enforce power-plane sequencing.
The SMBSUS control input selects control data between
two separate data registers. This feature allows the system
to select between two different power-plane configurations
asynchronously, eliminating latencies introduced by the
serial bus. Other features include thermal-overload and
overcurrent protection, ultra-low supply current, and both
hardware and software interrupt capabilities. These
devices are available in the space-saving 10-pin µMAX
package.
________________________Applications
Power-Plane Switching
Point-of-Load Power-Bus Switching
Notebook and Subnotebook Computers
Desktop Computers
Smart Batteries
____________________________Features
o Performs Serial-to-Parallel and Parallel-to-Serial
Conversions
o Three General-Purpose Digital Input/Output Pins
(withstand +28V)
o SMBus 2-Wire Serial Interface
o Supports SMBSUS Asynchronous Suspend Mode
o 3µA Supply Current
o +2.7V to +5.5V Supply Range
o Space-Saving, Low-Cost 10-Pin µMAX Package
______________Ordering Information
PART
MAX1661EUB
MAX1662EUB
MAX1663EUB
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
10 µMAX
10 µMAX
10 µMAX
__________________Pin Configuration
TOP VIEW
VCC 1
I/O1 2
I/O2 3
I/O3 4
GND 5
MAX1661
MAX1662
MAX1663
µMAX
10 ALERT
9 SMBCLK
8 SMBDATA
7 SMBSUS
6 ADD
Typical Operating Circuits appear at end of data sheet.
______________________________________________________________Selector Guide
PART
x
MAX1661
POWER-ON-
RESET STATE
Outputs Low
MAX1662
Outputs High
(high-Z state)
MAX1663
Outputs High
(high-Z state)
SMBus is a trademark of Intel Corp.
INTENDED
APPLICATION
N-Channel MOSFETs
P-Channel MOSFETs
P-Channel MOSFETs
SMBus ADDRESS
ADDRESS PIN
ADDRESS
GND
High-Z
VCC
0100000
0111100
1001000
GND
High-Z
VCC
0100001
0111101
1001001
GND
High-Z
VCC
0100010
0111110
1001010
________________________________________________________________ Maxim Integrated Products 1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 408-737-7600 ext. 3468.


Maxim Integrated Semiconductor Electronic Components Datasheet

MAX1663 Datasheet

Serial-to-Parallel/Parallel-to-Serial Converters and Load-Switch Controllers with SMBus Interface

No Preview Available !

Serial-to-Parallel/Parallel-to-Serial Converters and
Load-Switch Controllers with SMBus Interface
ABSOLUTE MAXIMUM RATINGS
VCC to GND ..............................................................-0.3V to +6V
I/O to GND (I/O1, I/O2, I/O3) ..................................-0.3V to +30V
I/O Sink Current (I/O1, I/O2, I/O3),
Internally Limited.............................................-1mA to +50mA
Digital Inputs to GND (SMBCLK, SMBDATA,
SMBSUS, ALERT).................................................-0.3V to +6V
ADD to GND ...............................................-0.3V to (VCC + 0.3V)
SMBDATA Current, ALERT Current ....................-1mA to +50mA
Continuous Power Dissipation (TA = +70°C)
10-pin µMAX (derate 5.6mW/°C above +70°C) ...........444mW
Operating Temperature Range
MAX166_EUB ..................................................-40°C to +85°C
Storage Temperature Range .............................-65°C to +160°C
Lead Temperature (soldering, 10sec) .............................+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
(VCC = +2.7V to +5.5V, TA = TMIN to TMAX, unless otherwise noted. Typical values are for TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
Input Voltage Range
Supply Current
Static condition; SMBDATA, SMBCLK, ADD,
ALERT = VCC or GND (Note 2)
Undervoltage Lockout/
Power-On Reset Threshold
VCC falling
I/O Sink Current
I/O Current Limit
Thermal Shutdown
VI/O_ = 0.4V, VCC = 2.7V or 5.5V
VI/O_ = 1.0V, VCC = 4.5V
I/O1, I/O2, or I/O3; VCC = 4.5V
Typical hysteresis of 10°C
I/O Leakage Current
VI/O_ = 28V, high-impedance state
VI/O_ = 0V, VCC; high-impedance state
Digital Input Current
VSMBDATA, VSMBCLK, V SMBSUS,
VADD = 0V, VCC
SMBus Logic Input
Voltage Range
VCC = 2.7V to 5.5V;
SMBDATA, SMBCLK, SMBSUS
Logic Input High Voltage
Logic Input Low Voltage
I/O_, SMBSUS, SMBCLK, SMBDATA
I/O_, SMBSUS, SMBCLK, SMBDATA
SMBDATA Output Low Sink
Current
VSMBDATA = 0.6V
ALERT Output Low Sink Current
ALERT Output Leakage Current
SMBus Input Capacitance
V ALERT = 0.4V
V ALERT = 5.5V, high-Z state
SMBCLK, SMBDATA
SMBus Clock Frequency
(Notes 3, 4)
MIN TYP
2.7
3
1.2 1.6
2
8 13
15 20
140
0.5
-1 0.5
-1
0
2.4
6
1
5
SMBCLK High Time
tHIGH
Measured between the 90% level of the rising
edge and the 90% level of the falling edge
4
SMBCLK Low Time
tLOW
Measured between the 10% level of the falling
edge and the 10% level of the rising edge
4.7
MAX UNITS
5.5 V
10 µA
2.5 V
mA
50 mA
°C
5
µA
1
1 µA
5.5 V
V
0.8 V
mA
mA
1 µA
pF
100 kHz
µs
µs
2 _______________________________________________________________________________________


Part Number MAX1663
Description Serial-to-Parallel/Parallel-to-Serial Converters and Load-Switch Controllers with SMBus Interface
Maker Maxim
Total Page 16 Pages
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