ISL12020M Datasheet, PDF (31/32 Pages) Intersil Corporation – Low Power RTC with Battery Backed SRAM, Integrated ±5ppm Temperature Compensation and Auto Daylight Saving

ISL12020M
Revision History
The revision history provided is for informational purposes only and is believed to be accurate, but not warranted. Please go to
web to make sure you have the latest Rev. (Continued)
DATE
REVISION
CHANGE
01/15/09
FN6667.2
Added text and equations for Ibat for temp sense ON, and for relative accuracy for 1m vs 10m
interval
Added text clarifying that no compensation at Vbat<2.7V
Revised entire Daylights savings time section
Added Application Example for DST
Added requirement for Vbat>1.8V in Vbat note.
Added apps circuit to survive Vbat<1.8V
Corrected All occurrences of Alpha tables
BOLD and shade the COMPENSATION registers in the big table to
indicate they are not to be overwritten. Also Bold an advisory
in the register sections.
Fixed blank bits in register tables and in text.
Register table: Change default values for compensation to xx's,
they are different with each device.
Added Datasheet curves
Added statement to Apps section on crystal handling similar to Maxim's
tHDDAT, added 20ns min, hysteresis moved to typical, SCL/SDA rise time min
Applied Intersil standards as follows: Updated lead finish note in
ordering information, added tjc note for thermal resistance, updated
over-temp note in electrical spec table, numbered equations that were
not initially, updated POD to latest version. Cosmetic edits throughout datasheet.
1.Page 3: IDD1 - Change Max from 6.5 to 7 and 5.5 to 6.
2.Page 3: Remove &#916;ATLSB spec
3.Page 4: Hysteresis spec - Remove Min and set Typ to 0.05X VDD
4. Page 4: tHD:DAT - Change Min from 0 to 20
5. Page 12-13: For Table 1, apply the yellow shaded and bold setting to XTO and ALPHAH
registers on page 13.
6. Page 18: Eq3 - Change "BETAVALUES" to "BETA VALUES"
7. Page 26: Eq7 - Change "ppmerror" to "ppm error"
8. Page 23: Change title for Table 25 to "ALPHA HOT REGISTER"
9. Page 16: Under "Initial AT and DT setting Register (ITRO)" section, please change the value
62.6ppm to 62.5ppm.
03/28/08
FN6667.1
Removed Min and Max limits for "Oscillator Initial Accuracy". Added Typ of +/-2, Replaced Note
11 with note 9.
02/27/08
FN6667.0 Initial Release to web
Products
Intersil Corporation is a leader in the design and manufacture of high-performance analog semiconductors. The
Company's products address some of the industry's fastest growing markets, such as, flat panel displays, cell phones,
handheld products, and notebooks. Intersil's product families address power management and analog signal
processing functions. Go to www.intersil.com/products for a complete list of Intersil product families.
*For a complete listing of Applications, Related Documentation and Related Parts, please see the respective device
information page on intersil.com: ISL12020M
To report errors or suggestions for this datasheet, please go to www.intersil.com/askourstaff
FITs are available from our website at http://rel.intersil.com/reports/search.php
For additional products, see www.intersil.com/product_tree
Intersil products are manufactured, assembled and tested utilizing ISO9000 quality systems as noted
in the quality certifications found at www.intersil.com/design/quality
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications
at any time without notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by
Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any
infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any
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For information regarding Intersil Corporation and its products, see www.intersil.com
31
FN6667.4
February 11, 2010