BQ26100_15 Datasheet, PDF (1/29 Pages) Texas Instruments – Based Security and Authentication IC

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bq26100
SLUS696B – JUNE 2006 – REVISED AUGUST 2015
bq26100 SHA-1/HMAC Based Security and Authentication IC with SDQ Interface
1 Features
•1 Provides Authentication of Battery Packs Through
SHA-1 Engine Based HMAC
• 160-Bytes 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
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 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.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
bq26100
VSON (6)
3.00 mm × 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Typical Application Diagram
P+
R1
4.7 kW
SDQ
+
C1
0.1 mF
bq26100
PWR SDQ
VSS
VSS
VSS
VSS
Protector
BAT
VSS
OC
DO
CO
P–
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.