Maxim DS3644 security manager

Maxim has released the DS3644, a security manager with 1024 bytes of non-imprinting memory to securely store sensitive data.

Internal tamper monitors protect against clock, electrical and temperature tampering, while tamper-detection inputs for external sensors enable complete customisation.

The on-chip non-imprinting memory allows the end user to selectively clear the memory based on user-specified tamper events.

This memory scheme ensures immediate data erasure in response to tampering, improving system security over SRAM-based implementations. The device is most appropriate for applications that require a higher level of security, like government and military systems, as well as any application where more than one tamper trigger needs to be monitored.

The manager is ultra-low-power and provides tamper detection regardless of the power source. An on-chip battery-backup controller constantly monitors the main power and automatically switches to the battery when the main power is too low or not present at all.

Drawing 4 µA of battery current, the device can retain critical information and monitor for tampers while on battery power.