DS3640
PRODUCTIONDeepCover Security Manager with I²C Interface and 1KB Nonimprinting Battery-Backed Encryption Key SRAM
Single-Chip Solution Integrates Advanced Physical Security to Protect Against Physical and Environmental Tamperings
Part Details
- 1024-Byte Nonimprinting Key Memory with High- Speed Erase
- 64-Byte General-Purpose RAM (Not Cleared)
- Real-Time Clock with Leap Year Compensation Valid Up to 2100
- Watchdog Timer
- CPU Supervisor
- Four General-Purpose Tamper-Detect Comparators with Associated Reference
- Three Tamper-Detect Logic Inputs
- On-Chip Programmable Temperature Sensing with Proprietary Rate-of-Change Detector
- On-Chip Random Number Generator (RNG)
- Latching and Time Stamping of Tamper Events
- Crystal Oscillator Tamper Monitoring
- Low Power Consumption
- 3.0V to 3.6V Single-Supply Operation
- CSBGA Package with No Horizontally Exposed Leads
The device includes a real-time clock (RTC), CPU supervisor, watchdog timer, and on-chip temperature sensor. In the event of a primary power failure, an external battery source is automatically switched in to keep the key memory, RTC, and tamper-detection circuitry active. The DS3640 provides low-leakage tamper-detection inputs for interface to external sensors, interlocks, and anti-tamper meshes. The DS3640 will also invoke a tamper event if the backup battery drops below a specified threshold, absolute temperature or temperature rate-of-change exceeds programmed limits, or crystal-oscillator frequency falls outside a specified window. The tamper event is latched and time stamped for future debugging purposes.
Access to the RTC, tamper monitoring, key memory, and device configuration is conducted through an I²C-compatible interface. The DS3640 is assembled in a Pb-free BGA package, which enhances key security in that the leads are not exposed to the outer edges of the package.
Applications
- Alarm Systems
- Gaming
- IT Security
- Point-of-Sale Terminals
- Routers/Switches
Documentation
Data Sheet 1
Reliability Data 1
Design Note 2
Technical Articles 1
Complete documentation is available upon completion of a Non-Disclosure Agreement (NDA). To request an NDA, click here.
This is the most up-to-date revision of the Data Sheet.
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