BQ3285_15 Datasheet, PDF (12/26 Pages) Texas Instruments – Real-Time Clock (RTC)

bq3285
DC Electrical Characteristics (T_A = T_OPR, V_CC = 5V ± 10%)
Symbol
Parameter
Minimum Typical Maximum
ILI
Input leakage current
-
-
±1
ILO
Output leakage current
-
-
±1
VOH
Output high voltage
2.4
VOL
Output low voltage
-
ICC
Operating supply current
-
VSO
Supply switch-over voltage
-
ICCB
Battery operation current
-
VPFD
Power-fail-detect voltage
4.0
IRCL
Input current when RCL = VSS.
-
IMOTH Input current when MOT = VCC
-
-
-
7
V_BC
0.3
4.17
-
-
-
0.4
15
-
0.5
4.35
185
-185
Unit
µA
µA
V
V
mA
V
µA
V
µA
µA
Conditions/Notes
VIN = VSS to VCC
AD0–AD7, INT, and SQW
in high impedance,
VOUT = VSS to VCC
IOH = -2.0 mA
IOL = 4.0 mA
Min. cycle, duty = 100%,
IOH = 0mA, IOL = 0mA
V_BC = 3V, TA = 25°C
Internal 30K pull-up
Internal 30K pull-down
Notes: Typical values indicate operation at TA = 25°C, VCC = 5V or VBC = 3V.
Crystal Specifications (DT-26 or Equivalent)
Symbol
fO
CL
TP
k
Q
R1
C0
C0/C1
DL
∆f/fO
Parameter
Oscillation frequency
Load capacitance
Temperature turnover point
Parabolic curvature constant
Quality factor
Series resistance
Shunt capacitance
Capacitance ratio
Drive level
Aging (first year at 25°C)
Minimum
-
-
20
-
40,000
-
-
-
-
-
Typical
32.768
6
25
-
70,000
-
1.1
430
-
1
Maximum
-
-
30
-0.042
-
45
1.8
600
1
-
Unit
kHz
pF
°C
ppm/°C
KΩ
pF
µW
ppm
12