2
LTC1694
1694fa
ORDER PART
NUMBER
LTC1694CS5
LTC1694IS5
(Note 1)
Supply Voltage (V
CC
) ................................................. 7V
SMBus1, SMBus2 Inputs ............ –0.3V to (V
CC
+ 0.3V)
Operating Ambient Temperature Range
LTC1694C ............................................... 0°C to 70°C
LTC1694I............................................ –40°C to 85°C
Junction Temperature........................................... 125°C
Storage Temperature Range ................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec)..................300°C
V
CC
1
GND 2
NC 3
5 SMBus1
4 SMBus2
TOP VIEW
S5 PACKAGE
5-LEAD PLASTIC TSOT-23
T
JMAX
= 125°C, θ
JA
= 256°C/ W LTEE
LTA8
S5 PART MARKING
The ● denotes specifications that apply over the full operating temperature range, otherwise specifications are at T
A
= 25°C.
V
CC
= 2.7V to 6V unless otherwise noted.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
CC
Supply Voltage Range 2.7 6 V
I
CC
Supply Current SMBus1 = SMBus2 = Open ● 20 60 100 µA
I
PULL-UP
Pull-Up Current SMBus1 = SMBus2 = 0V ● 125 275 350 µA
Boosted Pull-Up Current Positive Transition on SMBus ( Figure 1) ● 1.0 2.2 mA
Slew Rate = 0.5V/µs, SMBus > V
THRES
V
THRES
Input Threshold Voltage Slew Rate = 0.5V/µs (Figure 1) ● 0.4 0.65 0.9 V
SR
THRES
Slew Rate Detector Threshold SMBus > V
THRES
● 0.2 0.5 V/µs
t
r
SMBus Rise Time Bus Capacitance = 200pF (Note 2) ● 0.32 1.0 µs
Standard Mode I
2
C Bus Rise Time Bus Capacitance = 400pF (Note 3) ● 0.30 1.0 µs
f
MAX
SMBus Maximum Operating Frequency (Note 4) ● 100 kHz
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The rise time of an SMBus line is calculated from (V
IL(MAX)
–
0.15V) to (V
IH(MIN)
+ 0.15V) or 0.65V to 2.25V. This parameter is
guaranteed by design and not tested. With a minimum pull-up current of
125µA, a minimum boosted pull-up current of 1mA and a maximum input
threshold voltage of 0.9V:
Rise Time = [(0.9V – 0.65V)/125µA + (2.25V – 0.9V)/1mA] • 200pF
= 0.67µs
Note 3: The rise time of an I
2
C bus line is calculated from V
IL(MAX)
to
V
IH(MIN)
or 1.5V to 3V (with V
CC
= 5V). This parameter is guaranteed by
design and not tested. With a minimum boosted pull-up current of 1mA:
Rise Time = (3V – 1.5V) • 400pF/1mA = 0.6µs
Note 4: This parameter is guaranteed by design and not tested.
ABSOLUTE AXI U RATI GS
WWWU
PACKAGE/ORDER I FOR ATIO
UU
W
ELECTRICAL CHARACTERISTICS
Consult LTC Marketing for parts specified with wider operating temperature ranges.
