DS2436_07 Datasheet, PDF (1/29 Pages) Dallas Semiconductor – Battery ID/Monitor Chip

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FEATURES
ƒ Unique 1-Wire® interface requires only one
port pin for communication
ƒ Provides unique 64-bit identification number
to battery packs
ƒ On-board A/D converter monitors battery
voltage for end-of-charge and end-of-
discharge determination
ƒ Eliminates thermistors by sensing battery
temperature on-chip
ƒ 256-bit nonvolatile user memory available
for storage of data such as fuel gauge and
manufacturing information
ƒ 2-byte cycle counter
ƒ Operating range of -40°C to +85°C
ƒ Applications include portable computers,
portable/ cellular phones, consumer
electronics, and handheld instrumentation
DS2436
Battery ID/Monitor Chip
PACKAGE OUTLINE
DALLAS
DS2436
12 3
BOTTOM
NC 1
NC 2
DQ 3
GND ⁴
8
V_DD
7 ^NC
6 ^NC
5 ^NC
DS2436B+
TO-92 PACKAGE
DS2436Z+
150-mil, 8-Pin SOIC
PIN DESCRIPTION
GND
- Ground
DQ
- Data In/Out
V_DD
- Supply/Battery Connection
DESCRIPTION
The DS2436 Battery Identification/Monitor Chip provides a convenient method of tagging and
identifying battery packs by manufacturer, chemistry, or other identifying parameters. The DS2436
allows the battery pack to be coded with a unique 64-Bit ROM ID and a 16-Bit Manufacturer ID, and also
store information regarding the battery life and charge/ discharge characteristics in its nonvolatile
memory.
The DS2436 also performs the essential function of monitoring battery temperature, without the need for
a thermistor in the battery pack.
A cycle counter assists to determine the remaining cycle life of the battery.
Finally, the DS2436 measures battery voltage and sends that measured value to a host CPU for use in
end-of-charge or end-of-discharge determination or basic fuel gauge operation.
Information is sent to/from the DS2436 over a 1-Wire interface, so that battery packs need only have
three output connectors: power, ground, and the 1-Wire interface.
1-Wire is a registered trademark of Dallas Semiconductor.
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