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BQ4287 Datasheet(PDF) 2 Page - Texas Instruments

Part # BQ4287
Description  Real-Time Clock Module With NVRAM Control
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

BQ4287 Datasheet(HTML) 2 Page - Texas Instruments

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2
Nov. 1993 C
Recommended DC Operating Conditions (T
A =TOPR)
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 =TOPR,VCC =5V ± 10%)
Symbol
Parameter
Minimum
Typical
Maximum
Unit
Conditions/Notes
C
Battery capacity
-
130
-
mAh
Refer to graphs in Typical Bat-
tery Characteristics section
ILI
Input leakage current
-
-
± 1
µAVIN =VSS to VCC
ILO
Output leakage current
-
-
± 1
µA
AD0–AD7, INT and SQW in
high impedance
VOH
Output high voltage
2.4
-
-
V
IOH = -1.0 mA
VOL
Output low voltage
-
-
0.4
V
IOL = 4.0 mA
ICC
Operating supply current
-
7
15
mA
Min. cycle, duty = 100%, IOH
= 0mA, IOL = 0mA
ICCB
Battery operation current
-
0.3
0.5
µA
VBC =3V, TA = 25°C, no load
on VOUT or CEOUT
VSO
Supply switch-over voltage
-
3.0
-
V
VPFD
Power-fail-detect voltage
4.0
4.17
4.35
V
VBC
Backup cell voltage
-
3.0
-
V
Internal backup cell voltage;
refer to graphs in Typical Bat-
tery Characteristics section
VOUT1
VOUT voltage
VCC - 0.3V
-
-
V
IOUT = 100mA, VCC >VBC
VOUT2
VOUT voltage
VBC - 0.3V
-
-
V
IOUT = 100
µA, VCC <VBC
ICE
Chip enable input current
-
-
100
µA
Internal 50K pull-up
Note:
Typical values indicate operation at TA = 25°C, VCC =5V.
Absolute Maximum Ratings
Symbol
Parameter
Value
Unit
Conditions
VCC
DC voltage applied on VCC relative to VSS
-0.3 to 7.0
V
VT
DC voltage applied on any pin excluding VCC
relative to VSS
-0.3 to 7.0
V
VT
≤ VCC + 0.3
TOPR
Operating temperature
0 to +70
°C
Commercial
TSTG
Storage temperature
-40 to +70
°C
Commercial
TBIAS
Temperature under bias
-10 to +70
°C
Commercial
TSOLDER
Soldering temperature
260
°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.
bq4287


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