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DS28E10
1-Wire SHA-1 Authenticator
Provides Low-Cost, World-Class Authentication Security to Protect Your Development Investment
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Status
Active: In Production.
Description
The DS28E10 combines secure challenge-and-response authentication functionality based on the FIPS 180-3 specified Secure Hash Algorithm (SHA-1) with 224 bits of one-time programmable user EPROM in a single chip. Once written, the memory is automatically write protected. Additionally, each device has its own guaranteed unique 64-bit ROM identification number (ROM ID) that is factory programmed into the chip. Memory writes are performed 4 bytes at a time. A secure and low-cost factory programming service is available to preprogram device data, including the SHA-1 security data components. The device communicates over the single-contact 1-Wire® bus. The communication follows the standard 1-Wire protocol with the ROM ID acting as node address in the case of a multidevice 1-Wire network.
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Data Sheet
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An evaluation kit is available: DS28E10EVKIT DS9481R-3C7 DS9120, DS9120P, DS9120Q
Key Features
- Dedicated Hardware-Accelerated SHA-1 Engine for Generating SHA-1 MACs
- One Page of 28-Byte User OTP EPROM
- Irreversible Write Protection
- Unique Factory-Programmed 64-Bit Identification Number
- 1-Wire Interface for Standard and Overdrive Speeds
- Communicates with Host at Up to 15.4kbps at Standard Speed or Up to 125kbps in Overdrive Mode
- Operating Range from 2.8V to 3.6V, -40°C to +85°C
- 3-Lead SOT23 and 6-Lead TSOC Packages
- ±6kV Human Body Model (HBM) ESD Protection (typ) on the 1-Wire and VCC Pin
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Applications/Uses
- Reference Design License Management
- Sensor/Accessory Authentication and Calibration
- System Intellectual Property Protection
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Key Specifications:
| Memory (EPROM, EEPROM, ROM, NV SRAM) |
| Part Number |
Memory Type |
Memory Size |
Bus Type |
Real Time Clock |
DIP w/Int. Batt. |
Pwr. Cap Pckg. |
Battery Monitor |
GPIO |
VSUPPLY
(V) |
VSUPPLY
(V) |
| min |
max |
| DS28E10 |
EPROM |
28 Bytes |
1-Wire |
No |
No |
No |
No |
No |
2.8 |
3.6 |
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See All Memory (EPROM, EEPROM, ROM, NV SRAM) (58)
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Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
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Diagram
Typical Operating Circuit
More Information
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Information Index
Document Ref.: 219-0009
Rev 2;
2011-05-05
This page last modified: 2011-05-05
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