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X1288 Datasheet(PDF) 5 Page - Xicor Inc.

Part No. X1288
Description  2-Wire RTC Real Time Clock/Calendar/CPU Supervisor with EEPROM
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Maker  XICOR [Xicor Inc.]
Homepage  http://www.xicor.com
Logo XICOR - Xicor Inc.

X1288 Datasheet(HTML) 5 Page - Xicor Inc.

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REV 1.1.30 3/24/04
www.xicor.com
Preliminary Information
X1288
ABSOLUTE MAXIMUM RATINGS
Temperature Under Bias ................... -65°C to +135°C
Storage Temperature......................... -65°C to +150°C
Voltage on VCC, VBACK 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 VCC or VBACK (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.)
OPERATING CHARACTERISTICS
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
Notes
VCC
Main Power Supply
2.7
5.5
V
VBACK
Backup Power Supply
1.8
5.5
V
VCB
Switch to Backup Supply
VBACK -0.2
VBACK -0.1
V
VBC
Switch to Main Supply
VBACK
VBACK +0.2
V
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
Notes
ICC1
Read Active Supply
Current
VCC = 2.7V
400
µA
1, 5, 7, 14
VCC = 5.0V
800
µA
ICC2
Program Supply Current
(nonvolatile)
VCC = 2.7V
2.5
mA
2, 5, 7, 14
VCC = 5.0V
3.0
mA
ICC3
Main Timekeeping
Current
VCC = 2.7V
10
µA
3, 7, 8, 14, 15
VCC = 5.0V
20
µA
IBACK
Timekeeping Current –
(Low Voltage Sense and
Watchdog Timer dis-
abled
VBACK = 1.8V
1.25
µA
3, 6, 9, 14, 15
“See Perfor-
mance Data”
VBACK = 3.3V
1.5
µA
ILI
Input Leakage Current
10
µA
10
ILO
Output Leakage Current
10
µA
10
VIL
Input LOW Voltage
-0.5
VCC x 0.2 or
VBACK x 0.2
V13
VIH
Input HIGH Voltage
VCC x 0.7 or
VBACK x 0.7
VCC + 0.5 or
VBACK + 0.5
V13
VHYS
Schmitt Trigger Input
Hysteresis
VCC related level
.05 x VCC or
.05 x VBACK
V13
VOL1
Output LOW Voltage for
SDA and RESET
VCC = 2.7V
0.4
V
11
VCC = 5.5V
0.4
VOL2
Output LOW Voltage for
PHZ/IRQ
VCC = 2.7V
VCC x 0.3
V
11
VCC = 5.5V
VCC x 0.3
VOH2
Output HIGH Voltage for
PHZ/IRQ
VCC = 2.7V
VCC x 0.7
V
12
VCC = 5.5V
VCC x 0.7


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