DS2751 Maxim Integrated Products, DS2751 Datasheet - Page 2

• Manufacturer Part Number: DS2751
• Description: Multichemistry Fuel Garge
• Manufacturer: Maxim Integrated Products

ORDERING INFORMATION
Note 1: A “+” will be marked on the package near the Pin 1 indicator.
DESCRIPTION
The DS2751 multichemistry battery fuel gauge is a data-acquisition and information-storage device
tailored for cost-sensitive and space-constrained 1-cell Li+/polymer or 3-cell Ni battery-pack
applications. The DS2751 provides the key hardware components required to accurately estimate
remaining capacity by integrating low-power, precision measurements of temperature, voltage, current,
and current accumulation, as well as nonvolatile (NV) data storage, into the small footprint of a 3.0mm x
4.4mm 8-pin TSSOP package.
Through its 1-Wire interface, the DS2751 gives the host system read/write access to status and control
registers, instrumentation registers, and general-purpose data storage. Each device has a unique factory-
programmed 64-bit net address that allows it to be individually addressed by the host system, supporting
multibattery operation.
The DS2751 performs temperature, voltage, and current measurement to a resolution sufficient to support
process-monitoring applications such as battery charge control and remaining capacity estimation.
Temperature is measured using an on-chip sensor, eliminating the need for a separate thermistor.
Bidirectional current measurement and accumulation are accomplished using either an internal 25mW
sense resistor or an external device. The DS2751 also features a programmable I/O pin that allows the
host system to sense and control other electronics in the pack, including switches, vibration motors,
speakers, and LEDs.
Three types of memory are provided on the DS2751 for battery information storage: EEPROM, lockable
EEPROM, and SRAM. EEPROM memory saves important battery data in true NV memory that is
unaffected by severe battery depletion, accidental shorts, or ESD events. Lockable EEPROM becomes
ROM when locked to provide additional security for unchanging battery data. SRAM provides
inexpensive storage for temporary data.
DS2751E+025/T&R
DS2751E-025/T&R
DS2751E+T&R
DS2751E/T&R
DS2751E+025
DS2751E-025
DS2751E+
DS2751E
PART
MARKING
(Note 1)
(Note 1)
(Note 1)
(Note 1)
2751R
2751R
2751R
2751R
2751E
2751E
2751E
2751E
TEMP RANGE
-20°C to +70°C
-20°C to +70°C
-20°C to +70°C
-20°C to +70°C
-20°C to +70°C
-20°C to +70°C
-20°C to +70°C
-20°C to +70°C
2 of 19
8-Pin TSSOP, External Sense Resistor
8-Pin Lead Free TSSOP, External Sense
Resistor
8-Pin TSSOP, 25mW Sense Resistor
8-Pin Lead Free TSSOP, 25mW Sense
Resistor
DS2751E on Tape-and-Reel
DS2751E+ on Tape-and-Reel (Lead Free)
DS2751E-025 on Tape-and-Reel
DS2751E+025 on Tape-and-Reel (Lead
Free)
DESCRIPTION