DS2778 Maxim Integrated Products, DS2778 Datasheet - Page 5

• Manufacturer Part Number: DS2778
• Description: 2-Cell Stand-Alone Li+ Fuel-Gauge IC
• Manufacturer: Maxim Integrated Products

ELECTRICAL CHARACTERISTICS: 2-WIRE INTERFACE (DS2777/DS2778 ONLY)
(V
Note 1: Accumulation bias and offset bias registers set to 00h. NBEN bit set to 0.
Note 2: Measurement made with V
Note 3: Overvoltage (OV) and undervoltage (UV) delays (t
Note 4: Timing must be fast enough to prevent the DS2777/DS2778 from entering sleep mode due to bus low for period > t
Note 5: f
Note 6: The maximum t
Note 7: This device internally provides a hold time of at least 75ns for the SDA signal (referred to the V
Note 8: Filters on SDA and SCL suppress noise spikes at the input buffers and delay the sampling instant.
Note 9: C
SCL Clock Frequency
Bus-Free Time Between a STOP
and START Condition
Hold Time (Repeated) START
Condition
Low Period of SCL Clock
High Period of SCL Clock
Setup Time for a Repeated
START Condition
Data Hold Time
Data Setup Time
Rise Time of Both SDA and SCL
Signals
Fall Time of Both SDA and SCL
Signals
Setup Time for STOP Condition
Spike Pulse Widths Suppressed
by Input Filter
Capacitive Load for Each Bus
Line
SCL, SDA Input Capacitance
DD
= +4.0V to +9.2V, T
Protector and Optional SHA-1 Authentication
detected within 100ms of entering active mode.
bridge the undefined region of the falling edge of SCL.
SCL
B
PARAMETER
is total capacitance of one bus line in pF.
2-Cell, Stand-Alone, Li+ Fuel-Gauge IC with
must meet the minimum clock low time plus the rise/fall times.
_______________________________________________________________________________________
HD:DAT
A
= -20°C to +70°C.)
need only be met if the device does not stretch the low period (t
SRC
SYMBOL
t
t
t
t
t
HD:STA
SU:STA
HD:DAT
SU:DAT
SU:STO
t
t
C
= +8V, V
f
t
HIGH
LOW
t
SCL
BUF
C
t
t
SP
BIN
R
F
B
GS
(Note 4)
(Note 5)
(Notes 6, 7)
(Note 6)
(Note 8)
(Note 9)
driven with external +4.5V supply.
OVD
, t
UVD
CONDITIONS
) are reduced to zero seconds if the OV or UV condition is
LOW
0.1C
0.1C
20 +
20 +
MIN
100
1.3
0.6
1.3
0.6
0.6
0.6
0
0
0
) of the SCL signal.
B
B
IHMIN
TYP
of the SCL signal) to
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MAX
400
300
300
400
0.9
50
60
SLEEP
UNITS
kHz
μs
μs
μs
μs
μs
μs
ns
ns
ns
μs
ns
pF
pF
.
5