BQ4287 Datasheet, PDF (2/8 Pages) Texas Instruments – Real-Time Clock Module With NVRAM Control

bq4287
Absolute Maximum Ratings
Symbol
VCC
VT
TOPR
TSTG
TBIAS
TSOLDER
Parameter
DC voltage applied on VCC relative to VSS
DC voltage applied on any pin excluding VCC
relative to VSS
Operating temperature
Storage temperature
Temperature under bias
Soldering temperature
Value
-0.3 to 7.0
-0.3 to 7.0
0 to +70
-40 to +70
-10 to +70
260
Unit
Conditions
V
V
VT ≤ VCC + 0.3
°C
Commercial
°C
Commercial
°C
Commercial
°C
For 10 seconds
Note:
Permanent device damage may occur if Absolute Maximum Ratings are exceeded. Functional operation
should be limited to the Recommended DC Operating Conditions detailed in this data sheet. Exposure to con-
ditions beyond the operational limits for extended periods of time may affect device reliability.
Recommended DC Operating Conditions (T_A = T_OPR)
Symbol
Parameter
Minimum
Typical
Maximum
Unit
VCC
Supply voltage
4.5
5.0
5.5
V
VSS
Supply voltage
0
0
0
V
VIL
Input low voltage
-0.3
-
0.8
V
VIH
Input high voltage
2.2
-
VCC + 0.3
V
Note:
Typical values indicate operation at TA = 25°C.
DC Electrical Characteristics (T_A = T_OPR, V_CC = 5V ± 10%)
Symbol
Parameter
Minimum Typical Maximum
C
Battery capacity
-
130
-
ILI
Input leakage current
I_LO
Output leakage current
-
-
±1
-
-
±1
VOH
VOL
Output high voltage
Output low voltage
2.4
-
-
-
-
0.4
I_CC
Operating supply current
-
7
15
I_CCB
Battery operation current
-
0.3
0.5
VSO
Supply switch-over voltage
-
3.0
-
VPFD Power-fail-detect voltage
4.0
4.17
4.35
VBC
Backup cell voltage
-
3.0
-
VOUT1 VOUT voltage
VCC - 0.3V
-
-
VOUT2 VOUT voltage
VBC - 0.3V
-
-
ICE
Chip enable input current
-
-
100
Unit
mAh
µA
µA
V
V
mA
µA
V
V
V
V
V
µA
Conditions/Notes
Refer to graphs in Typical Bat-
tery Characteristics section
VIN = VSS to VCC
AD0–AD7, INT and SQW in
high impedance
IOH = -1.0 mA
IOL = 4.0 mA
Min. cycle, duty = 100%, IOH
= 0mA, IOL = 0mA
VBC = 3V, TA = 25°C, no load
on VOUT or CEOUT
Internal backup cell voltage;
refer to graphs in Typical Bat-
tery Characteristics section
IOUT = 100mA, VCC > VBC
IOUT = 100µA, VCC < VBC
Internal 50K pull-up
Note:
Typical values indicate operation at TA = 25°C, VCC = 5V.
Nov. 1993 C
2