Datasheet

MAX6653/MAX6663/MAX6664
Temperature Monitors and
PWM Fan Controllers
_______________________________________________________________________________________ 3
Note 1: Tested at +85
o
C. Values through the temperature range are guaranteed by design.
Note 2: Not production tested, guaranteed by design.
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +3.0V to +5.5V, T
A
= 0°C to +125°C, unless otherwise noted. Typical values are at V
CC
= +3.3V, T
A
= +25°C.) (Note1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Temperature Conversion Time 250 ms
Conversion Rate Timing Error (Note 2) 25 25 %
High level 80 100 120
Remote-Diode Sourcing Current
Low level 8 10 12
µA
DXN Source Voltage 0.7 V
TACHOMETER Input Hysteresis 100 mV
Output Low Voltage (Sink Current) V
OL
SDL, SDR, THERM, FAN_FAULT, SMBDATA,
PWM_OUT, V
CC
= +3V, I
OUT
= 6mA,
INT, V
CC
= +3V, I
OUT
= 4mA
0.4 V
Output High Leakage Current I
OH
INT, SDL, SDR, THERM, FAN_FAULT,
SMBDATA, PWM_OUT
1µA
Logic Low Input Voltage V
IL
SMBDATA, SMBCLK, INT, THERM, TACH/AIN 0.8 V
3.0V 2.2
Logic High Input Voltage V
IH
SMBDATA, SMBCLK, INT,
THERM, TACH/AIN
5.5V 2.6
V
Input Leakage Current I
LEAK
SMBDATA, SMBCLK, INT, THERM;
V
IN
= V
CC
or GND
±1 µA
Input Capacitance C
IN
5pF
SMBus TIMING
Serial Clock Frequency f
SCLK
(Note 2) 10 100 kHz
Clock Low Period t
LOW
10% to 10% (Note 2) 4 µs
Clock High Period t
HIGH
90% to 90% (Note 2) 4.7 µs
Bus Free Time Between Stop and
Start Condition
t
BUF
(Note 2) 4.7 µs
SMBus Start Condition Setup
Time
t
SU:STA
90% of SMBCLK to 90% of SMBDATA (Note 2) 4.7 µs
Start Condition Hold Time t
HD:STO
10% of SMBDATA to 10% of SMBCLK (Note 2) 4 µs
Stop Condition Setup Time t
SU:STO
90% of SMBCLK to 10% of SMBDATA (Note 2) 4 µs
Data Setup Time t
SU:DAT
10% of SMBDATA to 10% of SMBCLK (Note 2) 250 ns
Data Hold Time t
HD:DAT
10% of SMBCLK to 10% of SMBDATA (Note 2) 300 ns
SMBus Fall Time t
F
(Note 2) 300 ns
SMBus Rise Time t
R
(Note 2) 1000 ns
SMBus Timeout 29 37 45 ms