DS1312 Datasheet, PDF (5/11 Pages) Dallas Semiconductor – Nonvolatile Controller with Lithium Battery Monitor

ABSOLUTE MAXIMUM RATINGS*
Voltage on Any Pin Relative to Ground
Operating Temperature
Storage Temperature
Soldering Temperature
-0.5V to +7.0V
-40°C to +85°C
-55°C to +125°C
260°C for 10 seconds
DS1312
* This is a stress rating only and functional operation of the device at these or any other conditions
above those indicated in the operation sections of this specification is not implied. Exposure to
absolute maximum rating conditions for extended periods of time may affect reliability.
RECOMMENDED DC OPERATING CONDITIONS
PARAMETER
Supply Voltage TOL=GND
Supply Voltage TOL=VCCO
Battery Supply Voltage
Logic 1 Input
Logic 0 Input
SYMBOL
V_CCI
V_CCI
V_BAT
V_IH
V_IL
MIN
4.75
4.5
2.0
2.0
-0.3
TYP
5.0
5.0
MAX
5.5
5.5
6.0
V_CCI+0.3
+0.8
(-40°C to +85°C)
UNITS NOTES
V
1
V
1
V
1
V
1, 12
V
1, 12
DC ELECTRICAL CHARACTERISTICS
PARAMETER
Operating Current (TTL inputs)
Operating Current (CMOS inputs)
RAM Supply Current
(V_CCO ≥ V_CCI -0.2V)
RAM Supply Current
(V_CCO ≥ V_CCI -0.3V)
V_CC Trip Point (TOL=GND)
V_CC Trip Point (TOL=V_CCO)
V_BAT Trip Point
V_CC/V_BAT Switch Point
Output Current @ 2.4V
Output Current @ 0.4V
Input Leakage
Output Leakage
Battery Monitoring Test Load
SYMBOL
I_CC1
I_CC2
I_CCO1
I_CCO1
V_CCTP
V_CCTP
V_BTP
V_SW
I_OH
I_OL
I_IL
I_LO
R_INT
MIN
4.50
4.25
2.5
2.6
-1
-1.0
-1.0
0.8
(-40°C to +85°C; V_CCI >V_CCTP)
TYP MAX UNITS NOTES
200
400
µA
2
50
100
µA
2, 5
140
mA
3
200
mA
4
4.62
4.75
4.37
4.50
2.6
2.7
2.7
2.8
4
+1.0
+1.0
1.2
1.5
V
1
V
1
V
1
V
1
mA
7, 10
mA
7, 10
µA
µA
MΩ
DC ELECTRICAL CHARACTERISTICS (-40°C to +85°C; V_CCI < V_BAT; V_CCI < V_SW)
PARAMETER
SYMBOL MIN TYP MAX UNITS NOTES
Battery Current
I_BAT
100
nA
2
Battery Backup Current
I_CCO2
500
µA
6
Supply Voltage
V_CCO
V_BAT-0.2
V
1
CEO Output
V_OHL
V_BAT-0.2
V
1, 8
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