DS2761

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ORDERING INFORMATION

PART

MARKING DESCRIPTION

DS2761AE

D2761EA

DS2761BE

D2761EB

DS2761AE/T&R

D2761EA

DS2761AE on Tape-and-Reel

DS2761BE/T&R

D2761EB

DS2761BE on Tape-and-Reel

DS2761AE-025

2761A25

TSSOP, 25m

DS2761BE-025

2761B25

TSSOP, 25m

DS2761AE-025/T&R 2761A25

DS2761AE-025 in Tape-and-Reel

DS2761BE-025/T&R 2761B25

DS2761BE-025 in Tape-and-Reel

DS2761AX-025/T&R DS2761AR Flip-Chip, 25m

DS2761BX-025/T&R DS2761BR

Flip-Chip, 25m

DS2761AX/T&R

DS2761A

DS2761BX/T&R

DS2761B

DESCRIPTION

The DS2761 high-precision Li+ battery monitor is a data-acquisition, information-storage, and safety-

protection device tailored for cost-sensitive battery pack applications. This low-power device integrates

precise temperature, voltage, and current measurement, nonvolatile (NV) data storage, and Li+ protection

into the small footprint of either a TSSOP package or flip-chip package. The DS2761 is a key component

in applications including remaining capacity estimation, safety monitoring, and battery-specific data

storage.

Through its 1-Wire interface, the DS2761 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 DS2761 is capable of performing temperature, voltage, and current measurement to a resolution

sufficient to support process monitoring applications such as battery charge control, remaining capacity

estimation, and safety monitoring. 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 25m

W sense resistor or an external device. The DS2761 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 DS2761 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.