DS1388
I
2
C RTC/Supervisor with Trickle Charger
and 512 Bytes EEPROM
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implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
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19
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is a registered trademark of Maxim Integrated Products, Inc.
Revision History
REVISION
NUMBER
REVISION
DATE
DESCRIPTION
PAGES
CHANGED
0 4/05 Initial release. —
Removed the leaded parts from the Ordering Information. 1
Indicated the pullup voltage for SDA and SCL in the Pin Description table. 8
Added the oscillator bias circuit to the Block Diagram and removed the original Figure
8, 10
Added time and date POR values in the Power Control section. 9
Changed the last sentence of the Watchdog Alarm Counter section (first paragraph) to
“When the counter is read, the current counter value is latched into a register, which is
output on the serial data line and the watchdog counter reloads the seed value.”
12
Added “Access is inhibited whenever RST is low.” To the end of the Power-Up/Down,
Reset, and Pushbutton Reset Functions section (first paragraph).
12
In the Control Register (00Ch) section, bit 7 description, added a statement that EOSC is
used to reduce V
BAT
current when timekeeping is not required.
13
1 9/08
Replaced the I
2
C read and write figures. 17, 18
Corrected the RTC power-on default values in the Power Control section. 9
Corrected the date register range in Figure 4. 11
2 10/09
Added WF flag clear to the Watchdog Alarm Counter section. 12
In the Absolute Maximum Ratings section, added the thermal information, lead
information, and new Note 1, and updated the soldering information.
2–6
In the Pin Description, corrected X2 pin name and bias limit on SDA, SCL. 8
3 8/10
Added the package code and land pattern no. to the Package Information table. 18
