Maxim DS2476Q+U Deep Cover� Secure Processor is a secure ECDSA and HMAC SHA-256 coprocessor companion to the DS28C36. The coprocessor can compute any required HMACs or ECDSA signatures to do any operation on the DS28C36. The DS2476Q+U provides a core set of cryptographic tools derived from integrated asymmetric (ECC-P256) and symmetric (SHA-256) security functions. In addition to the security services provided by the hardware implemented crypto engines, the device integrates a FIPS/NIST true random number generator (RNG). The device also integrates 8Kb of secured EEPROM, a decrement-only counter, two pins of configurable GPIO, and a unique 64-bit ROM identification number (ROM ID). The ECC public/private key capabilities operate from the NIST defined P-256 curve. These keys include FIPS 186 compliant ECDSA signature generation and verification to support a bidirectional asymmetric key authentication model. The SHA-256 secret-key capabilities are compliant with FIPS 180 and are flexibly used either in conjunction with ECDSA operations or independently for multiple HMAC functions.
Feature
- BCD-Coded Century, Year, Month, Date, Day, Hours, Minutes, and Seconds with Automatic Leap-Year Compensation Valid Up to the Year 2100
- Programmable Watchdog Timer and RTC Alarm
- Century Register; Y2K-Compliant RTC
- +3.3 (W) or +5V (Y) Operation
- Precision Power-On Reset
- Power-Control Circuitry Support System Power-On from Date/Day/Time Alarm or Key Closure/Modem-Detect Signal
- 256 Bytes Battery-Backed SRAM
- Auxiliary Battery Input
- Accuracy of DS1511 Better than ±1 Minute/Month at +25°C
- Day-of-Week/Date Alarm Register
- Crystal Select Bit Allow RTC to Operate with 6pF or 12.6pF Crystal (DS1501)
- Battery Voltage-Level Indicator Flags
- Available as Chip (DS1501) or Stand-Alone Encapsulated DIP Module with Embedded Battery and Crystal (DS1511)
Applications
- Battery-Backed Systems
- Consumer Electronics
- Office Equipment
- Remote Systems
- Telecom Switches
