X1228
ABSOLUTE MAXIMUM RATINGS
Temperature Under Bias ................... -65°C to +135°C
Storage Temperature......................... -65°C to +150°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.
Voltage on V , V
and PHZ/IRQ
CC BACK
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 or V
(whichever is higher)
CC
BACK
DC Output Current .............................................. 5 mA
Lead Temperature (Soldering, 10 sec) ...............300°C
DC OPERATING CHARACTERISTICS (Temperature = -40°C to +85°C, unless otherwise stated.)
Symbol
Parameter
Conditions
Min
2.7
Typ
Max
5.5
Unit
V
Notes
V
Main Power Supply
Backup Power Supply
Switch to Backup Supply
Switch to Main Supply
CC
V
1.8
5.5
V
BACK
V
V
V
-0.2
V
-0.1
V
CB
BC
BACK
BACK
V
V
+0.2
V
BACK
BACK
OPERATING CHARACTERISTICS
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
µA
Notes
V
V
V
V
V
V
= 2.7V
= 5.0V
= 2.7V
= 5.0V
= 2.7V
= 5.0V
400
800
2.5
3.0
10
Read Active Supply
Current
CC
CC
CC
CC
CC
CC
I
I
I
1, 5, 7, 14
CC1
CC2
CC3
µA
mA
mA
µA
ProgramSupplyCurrent
(nonvolatile)
2, 5, 7, 14
Main Timekeeping
Current
3, 7, 8, 14, 15
20
µA
Timekeeping Current –
(Low Voltage Sense
and Watchdog Timer
disabled
V
= 1.8V
1.25
1.5
µA
µA
3, 6, 9, 14, 15
“See Perfor-
mance Data”
BACK
BACK
I
BACK
V
= 3.3V
I
Input Leakage Current
Output Leakage Current
10
µA
µA
10
10
LI
I
10
LO
V
V
x 0.2 or
CC
V
Input LOW Voltage
Input HIGH Voltage
-0.5
V
V
V
13
13
13
IL
x 0.2
BACK
V
V
x 0.7 or
V
V
+ 0.5 or
CC
CC
V
IH
x 0.7
+ 0.5
BACK
BACK
Schmitt Trigger Input
Hysteresis
.05 x V or
CC
V
V
related level
HYS
CC
.05 x V
BACK
V
V
V
V
V
V
= 2.7V
= 5.5V
= 2.7V
= 5.5V
= 2.7V
= 5.5V
0.4
0.4
Output LOW Voltage for
SDA and RESET
CC
CC
CC
CC
CC
CC
V
V
V
V
V
11
11
12
OL1
OL2
OH2
V
x 0.3
Output LOW Voltage for
PHZ/IRQ
CC
CC
V
x 0.3
V
V
x 0.7
x 0.7
Output HIGH Voltage
for PHZ/IRQ
CC
CC
V
Characteristics subject to change without notice. 4 of 31
REV 1.3 3/24/04
www.xicor.com
XICOR [ XICOR INC. ]
