BQ4845 Datasheet, PDF (10/22 Pages) Texas Instruments – Parallel RTC With CPU Supervisor

bq4845/bq4845Y
Absolute Maximum Ratings
Symbol
Parameter
Value
Unit
Conditions
VCC
VT
TOPR
DC voltage applied on VCC relative to VSS
DC voltage applied on any pin excluding VCC
relative to VSS
Operating temperature
-0.3 to 7.0
-0.3 to 7.0
0 to +70
-40 to +85
V
V
VT ≤ VCC + 0.3
°C
Commercial
°C
Industrial
TSTG
Storage temperature
TBIAS
Temperature under bias
TSOLDER Soldering temperature
-55 to +125
-40 to +85
+260
°C
°C
°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 (TA = TOPR)
Symbol
VCC
Parameter
Supply voltage
Minimum
4.5
4.75
Typical
5.0
5.0
Maximum
5.5
5.5
VSS
Supply voltage
0
VIL
Input low voltage
-0.3
VIH
Input high voltage
2.2
VBC
Backup cell voltage
2.3
0
0
-
0.8
-
VCC + 0.3
-
4.0
Note:
Typical values indicate operation at TA = 25°C.
Unit
Notes
V
bq4845Y
V
bq4845
V
V
V
V
Aug. 1995
10