X1243 – Preliminary Information
ABSOLUTE MAXIMUM RATINGS
COMMENT
Temperature under bias .................... -65°C to +135°C
Storage temperature ......................... -65°C to +150°C
Voltage on any pin with
respect to ground.................................-1.0V to 7.0V
DC output current................................................ 5 mA
Lead temperature (soldering, 10 seconds)........ 300°C
Stresses above those listed under “Absolute Maximum
Ratings” may cause permanent damage to the device.
This is a stress rating only; functional operation of the
device (at these or any other conditions above those indi-
cated in the operational sections of this specification) is
not implied. Exposure to absolute maximum rating condi-
tions for extended periods may affect device reliability.
DC OPERATING CHARACTERISTICS Temperature (-40°C to +85°C, unless otherwise stated.)
Symbol
Parameter
Main Power Supply
Backup Power Supply
Switch to Backup Supply
Switch to Main Supply
Supply Current
Condition
Min.
2.7
Typ.
Max.
5.5
Unit
V
Notes
V
CC
V
1.8
5.5
V
BACK
V
V
V
- 0.2
V
- 0.1
V
2
2
CB
BC
BACK
BACK
V
V
+ 0.1
BACK
BACK
I
I
I
V
V
V
V
V
V
= 2.7V
= 5.5V
= 2.7V
= 5.5V
= 2.7V
= 5.5V
1.2
1.7
5
µA
µA
3, 5, 10
CC1
CC
CC
CC
CC
CC
CC
Supply Current (External
crystal network)
3.8
7.5
2, 3, 5, 11
1, 3, 5, 10
2, 4, 6, 10
2, 4, 6, 11
CC2
CC3
15
µA
µA
µA
µA
µA
µA
µA
µA
µA
V
Program Supply Current
(nonvolatile)
1.5
3.0
1.0
1.5
3
I
I
Timekeeping Current
V
= 1.8V
= 5.5V
= 1.8V
= 5.5V
BACK1
BACK2
BACK
BACK
V
Timekeeping Current
(External crystal network)
V
V
1.6
7.5
BACK
BACK
15
I
Input Leakage Current
Output Leakage Current
Input LOW Voltage
10
7
7
LI
I
10
LO
V
-0.5
V
V
x 0.3 or
2, 9
IL
CC
x 0.3
BACK
V
Input HIGH Voltage
Output LOW Voltage
V
V
x 0.7 or
V
+ 0.5
+ 0.5
V
V
2, 9
8
IH
CC
CC
x 0.7
V
BACK
BACK
V
2.7V
5.5V
0.4
0.4
OL
Notes: (1) The device enters the Program state 200ns after a stop ending a write operation and continues for t
.
WC
(2) Periodically sampled and not 100% tested.
(3) V = V x 0.1, V = V x 0.9, f
= 400kHz, SDA = Open
IL
CC
IH
CC
SCL
(4) V = 0V.
CC
(5) V
(6) V
(7) V
= 0V.
BACK
= V
= V
, Others = GND or V
BACK BACK
SDA
SDA
SCL
= GND to V
V
= GND or V
CC, CLK CC
(8) I = 3.0mA at 5V, 1.5mA at 1.8V
OL
(9) Threshold voltages based on the higher of V or V
.
BACK
CC
(10)Driven by external 32.768kHz square wave oscillator on X1, X2 open.
(11)Using recommended crystal and oscillator network applied to X1 and X2 (25°C).
Characteristics subject to change without notice. 13 of 18
REV 1.1.4 5/31/01
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