DS1339 I
2
C Serial Real-Time Clock
20 of 20
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reserves the right to change the circuitry and specifications without notice at any time.
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REVISION HISTORY
DESCRIPTION
100108
Removed leaded part numbers from the Ordering Information table.
1
Removed the pullup resistor voltage spec from the Recommended DC
Operating Conditions table and added it to the pin descriptions.
2, 8
Removed Note 7 from the I
BKDR
specification in the DC Electrical Characteristics
table.
3
Updated the block diagram (Figure 3) to show that SQW/INT is open drain. 6
Added the UL link to the V
BACKUP
description in the Pin Description table.
8
Removed the duplicate Oscillator Circuit section.
9
Added the initial POR state for time and date registers in the Power Control
section.
9
Changed the series resistance (ESR) value in Table 2 from 45kΩ to 50kΩ.
10
Added the overbar to the “A” legend for NACK in Figure 8. 18
4/11
Updated the soldering temperature and added lead temperature information to
the Absolute Maximum Ratings section; added the Package Thermal
Characteristics section and updated the µSOP θ
JA
and θ
JC
numbers; changed
the V
CC
max numbers from 2.2V to 5.5V for DS1339-2 and 3.3V to 5.5V for
DS1339-3 in the Recommended DC Operating Conditions table.
2
Updated the I
CCS
parameter in the DC Electrical Characteristics table.
3
Changed the 10 Hour bit to 20 Hour bit for 02h, 09h, and 0Ch in Table 1 and the
Time and Date Operation section.
11, 12
Updated the Handling, PCB Layout, and Assembly section; removed the
transistor count from the Chip Information section; added the land pattern
numbers to the Package Information table.
19
