DS1340_11 Datasheet, PDF (15/16 Pages) Maxim Integrated Products – I2C RTC with Trickle Charger

I²C RTC with Trickle Charger
Revision History
REVISION REVISION
NUMBER DATE
DESCRIPTION
0
6/03 Initial release.
Changed “2-wire” to “I²C” throughout the data sheet.
Added UL recognition info bullet to the Features section and to the V_BACKUP pin
description.
Added the “I/O Capacitance (SCL, SDA)” parameter (C_I/O) to the AC Electrical
1
7/04 Characteristics table.
Added “SDA, SCL” and “V_CC = 0V” to the “Supply Voltage, Pullup (FT/OUT)” parameter
and changed the symbol from “V_IH” to “V_PU” in the Recommended DC Operating
Conditions table; in the DC Electrical Characteristics table, changed the “Oscillator
Current” parameter to “V_BACKUP Current.”
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.
2
12/04 _{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.
3
11/05 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_BACKUP.
Updated the Typical Operating Circuit by removing pin numbers and adding a bypass
capacitor.
In the Pin Description, updated the V_BACKUP description to indicate that no diodes
4
3/06 ^{should be placed between the battery and pin and added the UL link; changed the}
V_CC description.
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_RPU parameter and RST waveform from Figure 2. Replaced t_RST with t_REC.
In the Typical Operating Characteristics section, updated/changed the “FT vs.
V_BACKUP” graph to “OSCILLATOR FREQUENCY vs. SUPPLY VOLTAGE (FT x 64).”
In the Pin Description, added pullup voltage information to the SDA, SCL, and FT/OUT
5
8/08 descriptions.
Updated Figure 5.
In the Clock and Calendar section, added text explaining the use of EOSC to halt the
oscillator.
Replaced Figure 7 with an updated version; changed Figures 8 and 9 and added
Figure 10 with more comprehensive I²C figures.
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