The bq26100 device provides a method to authenticate battery packs, ensuring that only packs manufactured by authorized sub-contractors are used in the end application. The security is achieved using the SHA-1 hash function inside the widely adopted keyed-hash message authentication code (HMAC) construction. A unique 128-bit key is stored in each bq26100 device, allowing the host to authenticate each pack.

The bq26100 device communicates to the system over a simple one-wire bi-directional serial interface. The 5-kbits/s SDQ bus interface reduces communications overhead in the external microcontroller. The bq26100 device also derives power over the SDQ bus line via an external capacitor.

• Provides authentication of battery packs through SHA-1 engine based HMAC
• 160-byte one-time programmable (OTP), 16-bytes EEPROM
• Internal time-base eliminates external crystal oscillator
• Low-power operating modes:
  • Active: < 50 μA
  • Sleep: 8 μA typical
• Single-wire SDQ interface
• Powers directly from the communication bus
• 6-lead VSON package

• Communication interface
• SDQ
• Features
• SHA-1 Authentication
• Vin (Typ) (V)
• 7
• Power consumption (Typ) (mW)
• 50
• Operating temperature range (C)
• -40 to 85

BQ26100的完整型号有：BQ26100DRPR，以下是这些产品的关键参数及官网采购报价：

BQ26100DRPR，工作温度：-40 to 85，封装：VSON (DRP)-6，包装数量MPQ：3000个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：NIPDAU，TI官网BQ26100DRPR的批量USD价格：.484（1000+）

BQ26100EVM — SHA-1/HMAC BASED SECURITY AND AUTHENTICATION IC

The bq26100 provides a method to authenticate battery packs and other peripherals. The bq26100 uses a 128bit unique device key and a 160bit SHA-1/HMAC response to provide authentication. The device key is stored securely in each bq26100 device, allowing the host to authenticate each (...)