X1288 Datasheet, PDF (5/31 Pages) Xicor Inc. – 2-Wire RTC Real Time Clock/Calendar/CPU Supervisor with EEPROM

Preliminary Information
X1288
ABSOLUTE MAXIMUM RATINGS
Temperature Under Bias ................... -65°C to +135°C
Storage Temperature......................... -65°C to +150°C
Voltage on V_CC, V_BACK and PHZ/IRQ
pin (respect to ground) ............................-0.5V to 7.0V
Voltage on SCL, SDA, X1 and X2
pin (respect to ground) ............... -0.5V to 7.0V or 0.5V
above V_CC or V_BACK (whichever is higher)
DC Output Current .............................................. 5 mA
Lead Temperature (Soldering, 10 sec) ...............300°C
Stresses above those listed under “Absolute Maximum
Ratings” may cause permanent damage to the device.
This is a stress rating only and the functional operation
of the device at these or any other conditions above
those indicated in the operational sections of this spec-
ification is not implied. Exposure to absolute maximum
rating conditions for extended periods may affect
device reliability.
DC OPERATING CHARACTERISTICS (Temperature = -40°C to +85°C, unless otherwise stated.)
Symbol
V_CC
V_BACK
V_CB
V_BC
Parameter
Main Power Supply
Backup Power Supply
Switch to Backup Supply
Switch to Main Supply
Conditions
Min
Typ
Max
Unit
2.7
5.5
V
1.8
5.5
V
V_BACK -0.2
V_BACK
V_BACK -0.1 V
V_BACK +0.2 V
Notes
OPERATING CHARACTERISTICS
Symbol
Parameter
Conditions
Min
I_CC1
I_CC2
I_CC3
I_BACK
Read Active Supply
Current
Program Supply Current
(nonvolatile)
Main Timekeeping
Current
Timekeeping Current –
(Low Voltage Sense and
Watchdog Timer dis-
abled
V_CC = 2.7V
V_CC = 5.0V
V_CC = 2.7V
V_CC = 5.0V
V_CC = 2.7V
V_CC = 5.0V
V_BACK = 1.8V
V_BACK = 3.3V
I_LI
Input Leakage Current
I_LO Output Leakage Current
V_IL Input LOW Voltage
-0.5
V_IH
V_HYS
V_OL1
V_OL2
V_OH2
Input HIGH Voltage
Schmitt Trigger Input
Hysteresis
Output LOW Voltage for
SDA and RESET
Output LOW Voltage for
PHZ/IRQ
Output HIGH Voltage for
PHZ/IRQ
V_CC related level
V_CC = 2.7V
V_CC = 5.5V
V_CC = 2.7V
V_CC = 5.5V
V_CC = 2.7V
V_CC = 5.5V
V_CC x 0.7 or
V_BACK x 0.7
.05 x V_CC or
.05 x V_BACK
V_CC x 0.7
V_CC x 0.7
Typ
1.25
1.5
Max
400
800
2.5
3.0
10
20
Unit
µA
µA
mA
mA
µA
µA
µA
µA
Notes
1, 5, 7, 14
2, 5, 7, 14
3, 7, 8, 14, 15
3, 6, 9, 14, 15
“See Perfor-
mance Data”
10
µA
10
10
µA
10
V_CC x 0.2 or V
13
V_BACK x 0.2
V_CC + 0.5 or V
13
V_BACK + 0.5
V
13
0.4
V
11
0.4
V_CC x 0.3
V
11
V_CC x 0.3
V
12
REV 1.1.30 3/24/04
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