Rainbow Electronics MAX6654 - Manual (Page 3)

MAX6654
1°C Accurate Remote/Local Temperature
Sensor with SMBus Serial Interface
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V CC = +3V to +5.5V, T A = -55°C to +125°C, unless otherwise noted. Typical values are at V CC = +3.3V and T A = +25°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Logic Input Low Voltage V IL V CC = +3.0V to +5.5V +0.8
V CC = +3.0V +2.2
V
Logic Input High Voltage V IH
V
CC
= +5.5V +2.6 V
Input Leakage Current I LEAK V IN = GND or V CC
±2 µA
V OL = +0.6V +6
Output Low Sink Current I OL
V
OL
= +0.4V +1
mA
Input Capacitance C in +5 pF
Output High Leakage Current V OH = +5.5V +1 µA
Serial Clock Frequency f SCL (Note 4) 0 +100 kHz
Bus Free Time Between STOP
and START Conditions
t BUF +4.7 µs
START Condition Setup Time +4.7 µs
Repeat START Condition Setup
Time
t SU:STA 90% to 90% +50 µs
START Condition Hold Time t HD:STA 10% of SMBDATA to 90% of SMBCLK +4 µs
STOP Condition Setup Time t SU:STO 90% of SMBCLK to 10% of SMBDATA662 +4 µs
Clock Low Period t LOW 10% to 10% +4.7 µs
Clock High Period t
HIGH
90% to 90% +4 µs
Data Setup Time t SU: DAT 90% of SMBDATA to 10% of SMBCLK +250 ns
Data Hold Time t HD: DAT (Note 5) 0 µs
Receive SCL/SDA Rise Time t R +1 µs
Receive SCL/SDA Fall Time t F +300 ns
SMBus Timeout t TIMEOUT
SMBDATA and SMBCLK time low for reset
of serial interface
+25 +40 ms
Note 1: +25 °C ≤ T
A
≤ +85°C.
Note 2: If both the MAX6654 and the remote junction are below T A = -20 °C, then V
CC > 3.15V.
Note 3: The conversion time doubles for the extended resolution mode. This causes the average operating current to approximately
double.
Note 4: The serial interface resets when SMBCLK is low for more than t TIMEOUT .
Note 5: Note that a transition must internally provide at least a hold time to bridge the undefined region (300ns max) of SMBCLK’s
falling edge.