| Status |
| Part Number |
Status |
| DS2432 |
Active: In production, but some versions are no longer available. See Ordering Information. |
| Description |
|
The DS2432 combines 1024 bits of EEPROM, a 64-bit secret, an 8-byte register/control page with up to five user read/write bytes, a 512-bit SHA-1 engine, and a fully-featured 1-Wire interface in a single chip. Each DS2432 has its own 64-bit ROM registration number that is factory lasered into the chip to provide a guaranteed unique identity for absolute traceability. Data is transferred serially via the 1-Wire protocol, which requires only a single data lead and a ground return. The DS2432 has an additional memory area called the scratchpad that acts as a buffer when writing to the main memory, the register page or when installing a new secret. Data is first written to the scratchpad from where it can be read back. After the data has been verified, a copy scratchpad command will transfer the data to its final memory location, provided that the DS2432 receives a matching 160-Bit MAC. The computation of the MAC involves the secret and additional data stored in the DS2432 including the device's registration number. Only a new secret can be loaded without providing a MAC. The SHA-1 engine can also be activated to compute 160-bit message authentication codes (MAC) when reading a memory page or to compute a new secret, instead of loading it. Applications of the DS2432 include intellectual property security, after-market management of consumables, and tamper-proof data carriers. |
An evaluation kit is available: DS9090K
| Key Features |
|
Applications/Uses |
- 1128 Bits of 5V EEPROM Memory Partitioned Into Four Pages of 256 Bits, a 64-Bit Write-Only Secret, and Up to Five General-Purpose Read/Write Registers
- On-Chip 512-Bit ISO/IEC 10118-3 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
- Secret and Data Memory Can Be Write Protected (All or Page 0 Only) or Put in EPROM-Emulation Mode ("Write to 0", Page 1)
- Unique, Factory-Lasered and Tested 64-Bit Registration Number Assures Absolute Traceability Because No Two Parts Are Alike
- Built-In Multidrop Controller Ensures Compatibility with Other 1-Wire® Net Products
- Reduces Control, Address, Data, and Power to a Single Data Pin
- Directly Connects to a Single Port Pin of a Microprocessor and Communicates at Up to 16.3kbps
- Overdrive Mode Boosts Communication Speed to 142kbps
- Low-Cost 6-Lead TSOC Surface-Mount Package or Solder-Bumped UCSP™ Package
- Reads and Writes Over a Wide Voltage Range of 2.8V to 5.25V from -40°C to +85°C
|
|
- Device Authentication
- IEEE 1451.4 Sensor TEDS
- Ink/Toner Cartridges
- Medical Sensors
- PCB Identification
- Self-Configuration of Central Office Switches, Wireless Base Stations, PBXs, or other Modular-Based Rack Systems
|
| 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 |
With GPIO |
Features |
VSUPPLY
(V) |
VSUPPLY
(V) |
| min |
max |
| DS2432 |
EEPROM |
1K x 1 |
1-Wire |
No |
No |
No |
No |
No |
Secure Hash Standard |
2.8 |
5.5 |
| See All Memory (EPROM, EEPROM, ROM, NV SRAM) (52) |
| Key Specifications: Secure Memory Devices |
| Part Number |
Memory Type |
Memory Size |
Bus Type |
Security Features |
VCC
(V) |
Oper. Temp.
(°C) |
Package/Pins |
Smallest Available Pckg.
(mm2) |
| max w/pins |
| DS2432 |
EEPROM |
1K x 1 |
1-Wire |
Secure Hash Standard |
5.5 |
-40 to +85 |
|
17.8 |
| See All Secure Memory Devices (4) |
source：ShenZhen henlito electronic co.,ltd.
web:www.henlito.com
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