DS2435 Datasheet, PDF (1/24 Pages) Dallas Semiconductor – Battery Identification Chip with Time/Temperature Histogram

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PRELIMINARY
DS2435
Battery Identification Chip
with Time/Temperature Histogram
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°C to +85°C
Applications include portable computers,
portable/cellular phones, consumer
electronics, and handheld instrumentation.
PACKAGE OUTLINE
PR-35 PACKAGE
DALLAS
DS2435
1 23
BOTTOM VIEW
DQ
1
16
VDD
NC
2
15
NC
NC
3
14
NC
NC
4
13
NC
NC
5
12
NC
NC
6
11
NC
NC
7
10
NC
GND
8
9
GND
123
See Mech. Drawings Section
DS2435S 16-Pin SSOP
See Mech. Drawings Section
PIN DESCRIPTION
GND
- Ground
DQ
- Data In/Out
V_DD
- Supply Voltage
NC
- 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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