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DS2435 Datasheet

  • DS2435

  • Battery Identification Chip with Time/Temperature Histogram

  • Dallas   Dallas

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PRELIMINARY
DS2435
Battery Identification Chip
with Time/Temperature Histogram
www.dalsemi.com
FEATURES
Provides unique ID number to battery packs
Eliminates thermistors by sensing battery
temperature on-chip
Elapsed time counter provides indication of
battery usage/storage time
Time/temperature histogram function
provides essential information for
determining battery self-discharge
256-bit nonvolatile user memory available for
storage of user data such as gas gauge and
manufacturing information.
Operating range of -40擄C to +85擄C
Applications include portable computers,
portable/cellular phones, consumer
electronics, and handheld instrumentation.
PACKAGE OUTLINE
PR-35 PACKAGE
DALLAS
DS2435
1
2
3
BOTTOM VIEW
DQ
NC
NC
NC
NC
NC
NC
GND
GND
VDD
DQ
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
V
DD
NC
NC
NC
NC
NC
NC
GND
1
2
3
DS2435S 16-Pin SSOP
See Mech. Drawings Section
See Mech. Drawings Section
PIN DESCRIPTION
GND
DQ
V
DD
NC
- Ground
- Data In/Out
- Supply Voltage
- No Connect
DESCRIPTION
The DS2435 Battery Identification Chip with Time/Temperature Histogram provides a convenient
method of tagging and identifying battery packs by manufacturer, chemistry, or other identifying
parameters. The DS2435 allows the battery pack to be coded with a unique identification number and also
store information regarding the battery life and charge/discharge characteristics in its nonvolatile
memory.
The DS2435 performs the essential function of monitoring battery temperature without the need for a
thermistor in the battery pack. A time/temperature histogram function stores the amount of time that the
battery has been in one of its eight user definable temperature bands, allowing more accurate self-
discharge calculations to be carried out by the user for determining remaining battery capacity. The on-
board elapsed time counter provides a method that can even determine the amount of time that a battery
pack has been in storage, allowing for a more accurate self-discharge determination.
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