DS1340 Maxim, DS1340 Datasheet - Page 15

• Manufacturer Part Number: DS1340
• Description: The DS1340 is a real-time clock (RTC)/calendar that is pin compatible and functionally equivalent to the ST M41T00, including the software clock calibration
• Manufacturer: Maxim

REVISION
NUMBER
0
1
2
3
4
5
REVISION
DATE
12/04
11/05
6/03
7/04
3/06
8/08
______________________________________________________________________________________
Initial release.
Changed “2-wire” to “I
Added UL recognition info bullet to the Features section and to the V
description.
Added the “I/O Capacitance (SCL, SDA)” parameter (C
Characteristics table.
Added “SDA, SCL” and “V
and changed the symbol from “V
Conditions table; in the DC Electrical Characteristics table, changed the “Oscillator
Current” parameter to “V
Added the integrated-crystal and lead-free packages to the Ordering Information table;
added the integrated-crystal packages to the Features, Pin Configurations, Pin
Description.
In Table 1, added increased crystal ESR with increased supply minimum voltage
requirement.
Added the DS1340C Only section.
Updated Figure 5 to also show the “C Version” crystal.
Added the Handling, PC Board Layout, and Assembly section.
Added the integrated-crystal package Theta-JA and Theta-JC information to the
Thermal Information section.
Updated the Ordering Information table to correct lead-free/RoHS packages.
In the General Description section, indicated that the time and date function continues
while powered by V
Updated the Typical Operating Circuit by removing pin numbers and adding a bypass
capacitor.
In the Pin Description, updated the V
should be placed between the battery and pin and added the UL link; changed the
V
Added the Power Control section and new Table 1.
In the Handling, PC Board Layout, and Assembly section, added solder reflow
information for the RoHS SO package.
Added Package Information table.
Removed leaded part numbers from the Ordering Information table.
Removed the t
In the Typical Operating Characteristics section, updated/changed the “FT vs.
V
In the Pin Description, added pullup voltage information to the SDA, SCL, and FT/OUT
descriptions.
Updated Figure 5.
In the Clock and Calendar section, added text explaining the use of
oscillator.
Replaced Figure 7 with an updated version; changed Figures 8 and 9 and added
Figure 10 with more comprehensive I
CC
BACKUP
description.
” graph to “OSCILLATOR FREQUENCY vs. SUPPLY VOLTAGE (FT x 64).”
RPU
parameter and RST waveform from Figure 2. Replaced t
BACKUP
2
C” throughout the data sheet.
BACKUP
I
CC
2
.
= 0V” to the “Supply Voltage, Pullup (FT/OUT)” parameter
C RTC with Trickle Charger
Current.”
IH
” to “V
DESCRIPTION
BACKUP
2
C figures.
PU
” in the Recommended DC Operating
description to indicate that no diodes
I/O
) to the AC Electrical
BACKUP
RST
Revision History
to halt the
with t
pin
REC
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