Electrical characteristics (continued) – Rainbow Electronics MAX6642 User Manual
Page 3
MAX6642
±1°C, SMBus-Compatible Remote/Local
Temperature Sensor with Overtemperature Alarm
_______________________________________________________________________________________
3
Note 1: All parameters tested at T
A
= +25°C. Specifications over temperature are guaranteed by design.
Note 2: Timing specifications guaranteed by design.
Note 3: The serial interface resets when SCLK is low for more than t
TIMEOUT
.
Note 4: A transition must internally provide at least a hold time to bridge the undefined region (300ns max) of SCLK’s falling edge.
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +3.0V to +5.5V, T
A
= -40°C to +125°C, unless otherwise specified. Typical values are at V
CC
= +3.3V and T
A
= +25
°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
SMBus-COMPATIBLE INTERFACE (SCLK and SDA)
Logic Input Low Voltage
V
IL
0.8
V
Logic Input High Voltage
V
IH
V
CC
= 3.0V
2.2
V
Input Leakage Current
I
LEAK
V
IN
= GND or 5.5V
-1
+1
µA
Output Low Sink Current
I
OL
V
OL
= 0.6V
6
mA
Input Capacitance
C
IN
5
pF
SMBus TIMING (Note 2)
Serial Clock Frequency
f
SCLK
(Note 3)
100
kHz
Bus Free Time Between STOP
and START Condition
t
BUF
4.7
µs
START Condition Setup Time
4.7
µs
Repeat START Condition Setup
Time
t
SU:STA
90% to 90%
50
ns
START Condition Hold Time
t
HD:STA
10% of SDA to 90% of SCLK
4
µs
STOP Condition Setup Time
t
SU:STO
90% of SCLK to 90% of SDA
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
HD:DAT
(Note 4)
250
µs
Receive SCLK/SDA Rise Time
t
R
1
µs
Receive SCLK/SDA Fall Time
t
F
300
ns
Pulse Width of Spike Suppressed
t
SP
0
50
ns
SMBus Timeout
t
TIMEOUT
SDA low period for interface reset
20
28
40
ms