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MAX1662EUB+T

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
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________________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
♦ Performs Serial-to-Parallel and Parallel-to-Serial
Conversions
♦ Three General-Purpose Digital Input/Output Pins
(withstand +28V)
♦ SMBus 2-Wire Serial Interface
♦ Supports
SMBSUS Asynchronous Suspend Mode
♦ 3µA Supply Current
♦ +2.7V to +5.5V Supply Range
♦ Space-Saving, Low-Cost 10-Pin µMAX Package
MAX1661/MAX1662/MAX1663
________________________________________________________________
Maxim Integrated Products
1
1
2
3
4
5
10
9
8
7
6
ALERT
SMBCLK
SMBDATA
SMBSUSI/O3
I/O2
I/O1
V
CC
MAX1661
MAX1662
MAX1663
µMAX
TOP VIEW
ADDGND
__________________Pin Configuration
19-1306; Rev 0; 10/97
PART
MAX1661EUB
MAX1662EUB
MAX1663EUB
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
TEMP. RANGE PIN-PACKAGE
10 µMAX
10 µMAX
10 µMAX
EVALUATION KIT
AVAILABLE
______________Ordering Information
Typical Operating Circuits appear at end of data sheet.
SMBus is a trademark of Intel Corp.
PART
POWER-ON-
RESET STATE
INTENDED
APPLICATION
SMBus ADDRESS
ADDRESS PIN ADDRESS
MAX1661 Outputs Low N-Channel MOSFETs
GND
High-Z
V
CC
0100000
0111100
1001000
MAX1662
Outputs High
(high-Z state)
P-Channel MOSFETs
GND
High-Z
V
CC
0100001
0111101
1001001
MAX1663
Outputs High
(high-Z state)
P-Channel MOSFETs
GND
High-Z
V
CC
0100010
0111110
1001010
______________________________________________________________Selector Guide
Serial-to-Parallel/Parallel-to-Serial Converters and
Load-Switch Controllers with SMBus Interface
MAX1661/MAX1662/MAX1663
Serial-to-Parallel/Parallel-to-Serial Converters and
Load-Switch Controllers with SMBus Interface
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
CC
= +2.7V to +5.5V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are for T
A
= +25°C.) (Note 1)
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.
V
CC
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 (V
CC
+ 0.3V)
SMBDATA Current, ALERT Current....................-1mA to +50mA
Continuous Power Dissipation (T
A
= +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
V
CC
falling
Measured between the 10% level of the falling
edge and the 10% level of the rising edge
Static condition; SMBDATA, SMBCLK, ADD,
ALERT = V
CC
or GND (Note 2)
Measured between the 90% level of the rising
edge and the 90% level of the falling edge
(Notes 3, 4)
SMBCLK, SMBDATA
V
ALERT
= 5.5V, high-Z state
V
CC
= 2.7V to 5.5V;
SMBDATA, SMBCLK, SMBSUS
V
SMBDATA
, V
SMBCLK
, V
SMBSUS
,
V
ADD
= 0V, V
CC
V
ALERT
= 0.4V
V
SMBDATA
= 0.6V
V
I/O_
= 0V, V
CC
; high-impedance state
V
I/O_
= 28V, high-impedance state
V
I/O_
= 0.4V, V
CC
= 2.7V or 5.5V
V
I/O_
= 1.0V, V
CC
= 4.5V
I/O1, I/O2, or I/O3; V
CC
= 4.5V
Typical hysteresis of 10°C
I/O_, SMBSUS, SMBCLK, SMBDATA
CONDITIONS
µs4.7t
LOW
SMBCLK Low Time
µs4t
HIGH
SMBCLK High Time
kHz100SMBus Clock Frequency
pF5SMBus Input Capacitance
µA1
ALERT Output Leakage Current
mA1
ALERT Output Low Sink Current
mA6
SMBDATA Output Low Sink
Current
VLogic Input Low Voltage
V2.4Logic Input High Voltage
V1.2 1.6 2.5
Undervoltage Lockout/
Power-On Reset Threshold
µA3 10
V2.7 5.5Input Voltage Range
Supply Current
V0 5.5
SMBus Logic Input
Voltage Range
µA-1 1Digital Input Current
-1 0.5 1
µA
0.5 5
I/O Leakage Current
mA
2
I/O Sink Current
8 13
mA15 20 50I/O Current Limit
°C140Thermal Shutdown
UNITSMIN TYP MAXSYMBOLPARAMETER
0.8
I/O_, SMBSUS, SMBCLK, SMBDATA
MAX1661/MAX1662/MAX1663
Serial-to-Parallel/Parallel-to-Serial Converters and
Load-Switch Controllers with SMBus Interface
_______________________________________________________________________________________ 3
Note 1: Specifications from 0°C to -40°C are guaranteed by design, not production tested.
Note 2: Supply current is specified for static state only.
Note 3: The SMBus logic block is a static design that works with clock frequencies down to DC. While slow operation is possible, it
violates the 10kHz minimum clock frequency of the SMBus specifications, and may monopolize the bus.
Note 4: Refer to Figures 2a and 2b for SMBus timing parameter definitions (write and read diagrams).
Note 5: A transition must internally provide a hold time of 300ns to accommodate for the undefined region of the falling edge.
Note 6: Refer to Figure 3 for the acknowledge timing diagram and t
DV
parameter definition.
Note 7: Refer to Figure 5 for START-STOP interrupt timing diagrams and parameter definitions.
Note 8: Refer to Figure 4 for I/O setup and hold timing parameter definitions.
10% or 90% of SMBDATA
to 10% of the rising edge
of SMBCLK
Measured from 90% of the rising edge
of SMBCLK to 10% of the rising edge of
SMBDATA
Measured from 10% of the falling edge
of SMBDATA to 90% of the falling edge of
SMBCLK
Measured from 90% of the SMBCLK rising
edge to 90% of the SMBDATA falling edge
CONDITIONS
ns
500
t
SU:DAT
µs4t
SU:STO
SMBus Stop-Condition Setup
Time
µs4t
HD:STA
Start-Condition Hold Time
µs4.7t
SU:STA
Start-Condition Setup Time
UNITSMIN TYP MAXSYMBOLPARAMETER
Measured from 10% or 90% of V
I/O
to 10% of
the rising edge of SMBCLK (Note 8)
Measured from SMBCLK rising edge to 10%
or 90% of I/O (Note 4)
Between stop and start conditions (Note 7)
Tested with a 10kΩ pull-up resistor on
SMBDATA (Note 6)
(Notes 4, 5)
µs15t
SU:I/O
I/O Data Valid to SMBCLK
Rising-Edge Setup Time
ns100t
P:I/O
SMBus Write to I/O_
Propagation Delay
µs4.7t
BUF
SMBus Bus-Free Time
µs1t
DV
SMBCLK Falling Edge to
SMBus Data Valid Time
µs0t
HD:DAT
SMBCLK Falling Edge to
SMBDATA Transition Hold Time
Measured from the 10% point of the falling
edge of SMBDATA to the 10% point of the
rising edge of SMBDATA (Note 7)
(Note 8)
µs10 15 30t
LOW:SS
START-STOP Software-Interrupt
Pulse Width
µs0t
HD:I/O
I/O Data Hold Time
1000
SMBDATA Valid to SMBCLK
Rising Edge Time, Slave
Clocking in Data
V
CC
= 4.5V
to 5.5V
V
CC
= 2.7V
to 4.5V
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +2.7V to +5.5V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are for T
A
= +25°C.) (Note 1)
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16

MAX1662EUB+T

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Buy MAX1662EUB+T
Manufacturer:
Maxim Integrated
Description:
IC CONV SMBUS INTERFACE UMAX
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