DS1339 Maxim, DS1339 Datasheet - Page 20

• Manufacturer Part Number: DS1339
• Description: The DS1339 serial real-time clock (RTC) is a low-power clock/date device with two programmable time-of-day alarms and a programmable square-wave output
• Manufacturer: Maxim

REVISION HISTORY
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim
reserves the right to change the circuitry and specifications without notice at any time.
M a x i m I n t e g r a t e d P r o d u c t s , 1 2 0 S a n G a b r i e l D r iv e , S u n n y v a le , C A 9 4 0 8 6 4 0 8- 7 3 7 - 7 6 0 0
© 2011 Maxim Integrated Products
REVISION
100108
DATE
4/11
Removed leaded part numbers from the Ordering Information table.
Removed the pullup resistor voltage spec from the Recommended DC
Operating Conditions table and added it to the pin descriptions.
Removed Note 7 from the I
table.
Updated the block diagram (Figure 3) to show that SQW/INT is open drain.
Added the UL link to the V
Removed the duplicate Oscillator Circuit section.
Added the initial POR state for time and date registers in the Power Control
section.
Changed the series resistance (ESR) value in Table 2 from 45kΩ to 50kΩ.
Added the overbar to the “A” legend for NACK in Figure 8.
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
the V
DS1339-3 in the Recommended DC Operating Conditions table.
Updated the I
Changed the 10 Hour bit to 20 Hour bit for 02h, 09h, and 0Ch in Table 1 and the
Time and Date Operation section.
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.
CC
max numbers from 2.2V to 5.5V for DS1339-2 and 3.3V to 5.5V for
CCS
parameter in the DC Electrical Characteristics table.
BACKUP
BKDR
specification in the DC Electrical Characteristics
DESCRIPTION
description in the Pin Description table.
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Maxim is a registered trademark of Maxim Integrated Products, Inc.
JA
and θ
JC
numbers; changed
DS1339 I
2
C Serial Real-Time Clock
CHANGED
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