BQ26100 Datasheet | Texas Instruments

Product Folder Order Now Technical Documents Tools & Software Support & munity bq26100 SLUS696C - JUNE 2006 - REVISED FEBRUARY 2019 bq26100 SHA-1/HMAC-based security and authentication IC with an SDQ interface 1 Features - 1 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 munication bus - 6-lead VSON package 2 Applications - Cellular phones - PDA and smart phones - MP3 players - Digital cameras - Internet appliances - Handheld devices 3 Description 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 municates to the system over a simple one-wire bi-directional serial interface. The 5-kbits/s SDQ bus interface reduces munications overhead in the external microcontroller. The bq26100 device also derives power over the SDQ bus line via an external capacitor. Device Information(1) PART...