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DS28E02
1-Wire SHA-1 Authenticated 1Kb EEPROM with 1.8V Operation
Provides Low-Cost, Secure Bidirectional Authentication Over a Single Contact for Low-Power Applications
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Status
Active: In Production.
Description
The DS28E02 combines 1024 bits of EEPROM with challenge-and-response authentication security implemented with the FIPS 180-3 Secure Hash Algorithm (SHA-1). The 1024-bit EEPROM array is configured as four pages of 256 bits with a 64-bit scratchpad to perform write operations. All memory pages can be write protected, and one page can be put in EPROM-emulation mode, where bits can only be changed from a 1 to a 0 state. Each DS28E02 has its own guaranteed unique 64-bit ROM registration number that is factory installed into the chip. The DS28E02 communicates over the single-contact 1-Wire® bus. The communication follows the standard 1-Wire protocol with the registration number acting as the 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: DS9481R-3C7 DS9120, DS9120P, DS9120Q
Key Features
- 1024 Bits of EEPROM Memory Partitioned Into Four Pages of 256 Bits
- On-Chip 512-Bit SHA-1 Engine to Compute 160-Bit Message Authentication Codes (MACs) and to Generate Secrets
- Write Access Requires Knowledge of the Secret and the Capability of Computing and Transmitting a 160-Bit MAC as Authorization
- User-Programmable Page Write Protection for Page 0, Page 3, or All Four Pages Together
- User-Programmable OTP EPROM Emulation Mode for Page 1 ("Write to 0")
- Communicates to Host with a Single Digital Signal at 12.5kbps or 35.7kbps Using 1-Wire Protocol
- Switchpoint Hysteresis and Filtering to Optimize Communication Performance in the Presence of Noise
- Reads and Writes Over 1.75V to 3.65V Voltage Range from -20°C to +85°C
- 6-Lead TSOC and TDFN Packages
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Applications/Uses
- Medical Consumable Authentication
- Printer Cartridge Configuration and Monitoring
- 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 |
| DS28E02 |
EEPROM |
1K x 1 |
1-Wire |
No |
No |
No |
No |
No |
1.75 |
3.65 |
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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
Application Notes
Product Guides
Reliability Reports
Software/Models
Ordering Information
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Part Number
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Free
Sample |
Buy |
Status
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Package:
TYPE PINS FOOTPRINT
DRAWING CODE/VAR *
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Temp |
RoHS/Lead-Free?
Materials Analysis
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| DS28E02P+
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Active |
TSOC;6 pin;17.8 mm²
Outline Drawing:21-0382 (PDF)
Land Pattern: 90-0321 (PDF)
Use pkgcode/variation: D6+1*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| DS28E02P+T&R
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Active |
TSOC;6 pin;17.8 mm²
Outline Drawing:21-0382 (PDF)
Land Pattern: 90-0321 (PDF)
Use pkgcode/variation: D6+1*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| DS28E02Q+T&R
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Active |
TDFN-EP;6 pin;9.6 mm²
Outline Drawing:21-0137 (PDF)
Land Pattern: 90-0058 (PDF)
Use pkgcode/variation: T633+2*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| DS28E02Q+U
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Active |
TDFN-EP;6 pin;9.6 mm²
Outline Drawing:21-0137 (PDF)
Land Pattern: 90-0058 (PDF)
Use pkgcode/variation: T633+2*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
Notes:
- Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
- Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
- Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt; -D = drypack; -U/+U on DS parts = cut tape. More: See Full Data Sheet or Maxim Product Naming Conventions.
- * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.
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Information Index
Document Ref.: 219-0008
Rev 1;
2012-03-29
This page last modified: 2012-03-29
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