The DS2775–DS2778 report available capacity for rechargeable lithium-ion (Li+) and Li+ polymer (Li-Poly) batteries in mAh and as a percentage of full. Safe operation is ensured by the integrated Li+ protector. The DS2776/DS2778 support SHA-1-based challenge-response authentication in addition to all other DS2775/DS2777 features.
Precision measurements of voltage, temperature, and current, along with a cell characteristics table and application parameters, are used for capacity estimation calculations. The capacity registers report a conservative estimate of the amount of charge that can be removed given the current temperature, discharge rate, stored charge, and application parameters.
The DS2775–DS2778 operate from +4.0V to +9.2V for direct integration into battery packs with two Li+ or Li- Poly cells.
In addition to nonvolatile storage for cell compensation and application parameters, the DS2775–DS2778 offer 16 bytes of EEPROM for use by the host system and/or pack manufacturer to store battery lot and date tracking information. The EEPROM can also be used for nonvolatile storage of system and/or battery usage statistics. A Maxim 1-Wire® (DS2775/DS2776) or 2-wire (DS2777/DS2778) interface provides serial communication to access measurement and capacity data registers, control registers, and user memory. The DS2776/DS2778 use the SHA-1 hash algorithm in a challenge-response pack authentication protocol for battery-pack verification.
* Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.
Devices:
1-8 of 8
DS2775
Free Sample
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Status
Package:
TYPE PINS FOOTPRINT
DRAWING CODE/VAR *
Temp
RoHS/Lead-Free? Materials Analysis
DS2775G+
Active
TDFN;14 pin;15 mm²
Outline Drawing: 21-0253 (PDF)
Land Pattern: 90-0246 (PDF)
Use pkgcode/variation: T1435N+1*
-40°C to +85°C
See data sheet
DS2775G+T&R
Active
TDFN;14 pin;15 mm²
Outline Drawing: 21-0253 (PDF)
Land Pattern: 90-0246 (PDF)
Use pkgcode/variation: T1435N+1*
-40°C to +85°C
See data sheet
DS2776
Free Sample
Buy
Status
Package:
TYPE PINS FOOTPRINT
DRAWING CODE/VAR *
Temp
RoHS/Lead-Free? Materials Analysis
DS2776G+
Active
TDFN;14 pin;15 mm²
Outline Drawing: 21-0253 (PDF)
Land Pattern: 90-0246 (PDF)
Use pkgcode/variation: T1435N+1*
-40°C to +85°C
See data sheet
DS2776G+T&R
Active
TDFN;14 pin;15 mm²
Outline Drawing: 21-0253 (PDF)
Land Pattern: 90-0246 (PDF)
Use pkgcode/variation: T1435N+1*
-40°C to +85°C
See data sheet
DS2777
Free Sample
Buy
Status
Package:
TYPE PINS FOOTPRINT
DRAWING CODE/VAR *
Temp
RoHS/Lead-Free? Materials Analysis
DS2777G+
Active
TDFN;14 pin;15 mm²
Outline Drawing: 21-0253 (PDF)
Land Pattern: 90-0246 (PDF)
Use pkgcode/variation: T1435N+1*
-40°C to +85°C
See data sheet
DS2777G+T&R
Active
TDFN;14 pin;15 mm²
Outline Drawing: 21-0253 (PDF)
Land Pattern: 90-0246 (PDF)
Use pkgcode/variation: T1435N+1*
-40°C to +85°C
See data sheet
DS2778
Free Sample
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Status
Package:
TYPE PINS FOOTPRINT
DRAWING CODE/VAR *
Temp
RoHS/Lead-Free? Materials Analysis
DS2778G+
Active
TDFN;14 pin;15 mm²
Outline Drawing: 21-0253 (PDF)
Land Pattern: 90-0246 (PDF)
Use pkgcode/variation: T1435N+1*
-40°C to +85°C
See data sheet
DS2778G+T&R
Active
TDFN;14 pin;15 mm²
Outline Drawing: 21-0253 (PDF)
Land Pattern: 90-0246 (PDF)
Use pkgcode/variation: T1435N+1*
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