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X1228 Datasheet(PDF) 4 Page - Xicor Inc.

Part # X1228
Description  Real Time Clock/Calendar/CPU Supervisor with EEPROM
Download  31 Pages
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Manufacturer  XICOR [Xicor Inc.]
Direct Link  http://www.xicor.com
Logo XICOR - Xicor Inc.

X1228 Datasheet(HTML) 4 Page - Xicor Inc.

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X1228
REV 1.3 3/24/04
Characteristics subject to change without notice.
4 of 31
www.xicor.com
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
specification is not implied. Exposure to absolute max-
imum 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
disabled
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
V11
VCC = 5.5V
0.4
VOL2
Output LOW Voltage for
PHZ/IRQ
VCC = 2.7V
VCC x 0.3
V11
VCC = 5.5V
VCC x 0.3
VOH2
Output HIGH Voltage
for PHZ/IRQ
VCC = 2.7V
VCC x 0.7
V12
VCC = 5.5V
VCC x 0.7


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