BQ4845_14 Datasheet, PDF (11/24 Pages) Texas Instruments – Parallel RTC With CPU Supervisor

bq4845/bq4845Y
DC Electrical Characteristics (TA = TOPR, _VCCmin ≤ VCC ≤ VCCmax)
Symbol
Parameter
ILI
Input leakage current
ILO
VOH
V_OHB
VOL
Output leakage current
Output high voltage
V_OH, BC Supply
Output low voltage
ICC
ISB1
Operating supply current
Standby supply current
Minimum
-
-
2.4
VBC- 0.3
-
-
-
Typical
-
-
-
-
-
12
3
ISB2
Standby supply current
-
1.5
VSO
ICCB
VPFD
VOUT1
VOUT2
VRST
VINT
VWDO
IWDIL
IWDIH
Supply switch-over voltage
-
Battery operation current
-
Power-fail-detect voltage
4.55
Power-fail-detect voltage
4.30
V_OUT voltage
V_OUT voltage
RST output voltage
VCC - 0.3V
VBC - 0.3V
-
INT output voltage
-
-
WDO output voltage
2.4
Watchdog input low current
-50
Watchdog input high current
-
V_BC
0.3
4.62
4.37
-
-
-
-
-
-
-10
20
Maximum
±1
±1
-
-
0.4
25
-
-
-
0.5
4.75
4.5
-
-
0.4V
0.4V
0.4V
-
-
50
Unit
µA
µA
V
V
V
mA
mA
mA
V
µA
V
V
V
V
-
-
-
-
µA
µA
Conditions/Notes
VIN = VSS to VCC
CS = VIH or OE = VIH or WE
= VIL
IOH = -2.0 mA
VBC > VCC, IOH = -10µA
IOL = 4.0 mA
Min. cycle, duty = 100%,
CS = VIL, II/O = 0mA
CS = VIH
CS ≥ VCC - 0.2V,
0V ≤ VIN ≤ 0.2V,
or VIN ≥ VCC - 0.2V
V_BC = 3V, TA = 25°C, no load
on VOUT or CEOUT
bq4845
bq4845Y
IOUT = 100mA, VCC > VBC
IOUT = 100µA, VCC < VBC
IRST = 4mA
IINT = 4mA
ISINK = 4mA
ISOURCE = 2mA
0 < VWDI < 0.8V
2.2 < VWDI < VCC
Notes:
Typical values indicate operation at TA = 25°C, VCC = 5V.
RST and INT are open-drain outputs.
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
Aug. 1995
11