Rainbow Electronics MAX6622 - Manual (Page 3)

MAX6622
5-Channel Precision Temperature Monitor
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V CC = +3.0V to +5.5V, V STBY = V CC , T A = -40°C to +125°C, unless otherwise noted. Typical values are at V CC = +3.3V and
T A = +25°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
SMBus INTERFACE (SCL, SDA), STBY
Logic Input Low Voltage V IL 0.8 V
V CC = 3.0V 2.2
Logic Input High Voltage V
IH
V CC = 5.0V 2.4
V
Input Leakage Current -1 +1 µA
Output Low Voltage V OL I SINK = 6mA 0.3 V
Input Capacitance C IN 5 pF
SMBus-COMPATIBLE TIMING (Figures 3 and 4) (Note 2)
Serial-Clock Frequency f
SCL
(Note 3) 400 kHz
f SCL = 100kHz 4.7 Bus Free Time Between STOP
and START Condition
t BUF
f SCL = 400kHz 1.6
µs
f SCL = 100kHz 4.7
START Condition Setup Time
f SCL = 400kHz 0.6
µs
90% of SCL to 90% of SDA,
f
SCL = 100kHz
0.6
Repeat START Condition Setup
Time
t SU:STA
90% of SCL to 90% of SDA,
f
SCL = 400kHz
0.6
µs
START Condition Hold Time t HD:STA 10% of SDA to 90% of SCL 0.6 µs
90% of SCL to 90% of SDA,
f
SCL = 100kHz
4
STOP Condition Setup Time t SU:STO
90% of SCL to 90% of SDA,
f
SCL = 400kHz
0.6
µs
10% to 10%, f SCL = 100kHz 1.3
Clock Low Period t LOW
10% to 10%, f SCL = 400kHz 1.3
µs
Clock High Period t HIGH 90% to 90% 0.6 µs
f SCL = 100kHz 300
Data Hold Time t HD:DAT
f SCL = 400kHz (Note 4) 900
ns
f SCL = 100kHz 250
Data Setup Time t SU:DAT
f
SCL
= 400kHz 100
ns
f SCL = 100kHz 1
Receive SCL/SDA Rise Time t R
f SCL = 400kHz 0.3
µs
Receive SCL/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 25 37 45 ms
Note 1: All parameters are tested at T A = +85°C. Specifications over temperature are guaranteed by design.
Note 2: Timing specifications are guaranteed by design.
Note 3: The serial interface resets when SCL 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 SCL’s falling edge.