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4Kb EEPROM with single-wire HDQ interface and temperature sensor


Package | PIN: YZG | 12
Temp: I (-40 to 85)
Carrier: Cut Tape
Qty Price
1-9 $1.22
10-24 $1.10
25-99 $1.02
100-249 $0.90
250-499 $0.84
500-749 $0.71
750-999 $0.60
1000+ $0.58


  • Serial Non-Volatile Memory (NVM)
    • 512 Byte (4Kb) EEPROM
    • Provides Battery Pack NVM storage for bq27505-E1 Fuel Gauge:
      • Manufacturing Data
      • Operational History
      • Resistance Tables
      • State of Health Information
  • Single Wire HDQ Communications Port
  • Integrated 2.5V LDO Linear Regulator
    • Ultra-low power “shutdown” mode (1µA Typical)
      via auto-timeout and/or host command
    • Wake up from shutdown via HDQ break
  • Internal Die-Temperature Sensor
    • ±5°C Range = –40°C to 85°C
    • Raw AD to Temperature Conversion Performed by Host Firmware
  • Package
    • 12-pin, 1490 × 2350 µm WCSP (YZG), 0.625mm Max Thickness, 0.5mm Pitch

Texas Instruments  BQ2028YZGT

The Texas Instruments bq2028 serial 4Kb nonvolatile memory (EEPROM) with integrated temperature sensor and LDO linear regulator provides pack-side memory storage and temperature monitoring for a single-cell system-side battery fuel gauge solution such as the bq27505-E1.

The bq2028 communicates with the bq27505-E1 gauge over a single-wire HDQ interface with a minimal overhead protocol yet ensures error free data transfer.