1 of 20
112099
FEATURES
Provides unique ID number to battery packs
Eliminates thermistors by sensing battery
temperature on-chip
256-bit nonvolatile user memory available
for storage of user data such as gas gauge
and manufacturing information
Operating range of -40C to +85C
Applications include portable computers,
portable/cellular phones, consumer
electronics, and handheld instrumentation.
Surface-mount package (209-mil SSOP16)
available
PIN DESCRIPTION
GND -
Ground
DQ -
Data
In/Out
V
DD
- Supply Voltage
NC
- No Connect
PACKAGE OUTLINE
DS2434
PR-35 PACKAGE
See Mech. Drawings
Section
DESCRIPTION
The DS2434 Battery Identification Chip provides a convenient method of tagging and identifying battery
packs by manufacturer, chemistry, or other identifying parameters. The DS2434 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 DS2434 also performs the essential function of monitoring battery temperature, without the need for
a thermistor in the battery pack.
Information is sent to/from the DS2434 over a 1-Wire interface, so that battery packs need only have
three output connectors; power, ground, and the 1-Wire interface.
DS2434
Battery Identification Chip
www.dalsemi.com
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
DS2434 16-Pin SSOP
See Mech. Drawings
Section
GND
D
Q
VDD
DS2434
2 of 20
DETAILED PIN DESCRIPTION
PIN
14-PIN SOIC
PIN
PR35
SYMBOL
DESCRIPTION
1
1
GND
Ground pin
14
2
DQ
Data Input/Output pin- for 1Wire communication port
13
3
VDD
Supply pin- input power supply
OVERVIEW
The DS2434 has five major components: 1) Scratchpad Memory, 2) Nonvolatile Memory, 3) On-board
SRAM, 4) Temperature Sensor, and 5) ID Register. All data is read and written least significant bit first.
Access to the DS2434 is over a 1-Wire interface. Charging parameters and other data such as battery
chemistry, gas gauge information, and other user data would be stored in the DS2434, allowing this
information to be permanently stored in the battery pack. Nonvolatile (E
2
) RAM holds information even
if the battery goes dead; as long as the battery remains within typical charge/discharge operating range,
the SRAM provides battery-backed storage of information.
DS2434 BLOCK DIAGRAM Figure 1
PDF 
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