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Data sheet
A newer version of this product is available
Same functionality with different pin-out to the compared device
BQ26100
- 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
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.
Technical documentation
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View all 6 | Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | bq26100 SHA-1/HMAC-based security and authentication IC with an SDQ interface datasheet (Rev. C) | PDF | HTML | 17 Feb 2019 |
| Application note | Method to Enhance Authentication Security of BQ26100 | PDF | HTML | 06 Sep 2022 | |
| User guide | bq26100 Evaluation Software User's Guide (Rev. A) | 04 Oct 2013 | ||
| Analog Design Journal | Improving Battery Safety, Charging, and Fuel Gauging in Portable Media Apps | 11 Mar 2009 | ||
| Application note | Single-Cell Impedance Track Gas Gauge for Novices | 16 Jun 2007 | ||
| Application note | How to Implement SHA-1/HMAC Authentication for bq26100 (Rev. A) | 09 Oct 2006 |
Design & development
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Evaluation board
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 128 bit unique device key and a 160 bit SHA-1/HMAC response to provide authentication. The device key is stored securely in each bq26100 device, allowing the host to authenticate each (...)
User guide: PDF
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| VSON (DRP) | 6 | Ultra Librarian |
Ordering & quality
Information included:
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Information included:
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Support & training
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