DS3645K

DS3645K Datasheet

DS3645

Part	Datasheet
DS3645K	DS3645K (pdf)

PDF Datasheet Preview
DS3645 4KB Secure Memory with Tamper Protection for Network Server Applications Single-Chip Solution Integrates Advanced Physical Security with On-Chip Encryption Key Memory NDA Required. Request Full Data Sheet The DS3645 is a secure supervisor with 4096 bytes of SRAM for applications requiring the secure storage of sensitive data and the physical tamper-sensing response functions required in cryptographic processors and data security equipment. One of the DS3645's primary features is the on-chip encryption key memory, consisting of 32 128-byte banks incorporating a high-speed, direct-clearing function. The 4KB key memory is constantly complemented in the background to prevent memory imprinting. In the event of a qualified tamper event, the key memory is rapidly cleared and a negative bias is applied to clear SRAM external to the DS3645. The device includes a real-time seconds counter, watchdog timer, CPU supervisor, nonvolatile NV SRAM controller, 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, seconds counter, and tamper-detection circuitry active. The DS3645 provides low-leakage tamper-detection inputs for interface to external sensors, interlocks, and antitamper meshes. The DS3645 also invokes a tamper event if the backup battery drops below a specified threshold or absolute temperature, if the temperature rate-of-change exceeds programmed limits, or if the crystal oscillator frequency falls outside a specified window. The tamper event is latched and timestamped for future debugging purposes. Access to the seconds counter, tamper monitoring, key memory, and device configuration is conducted through an I2-C-compatible interface. The DS3645 is assembled in a CSBGA package, which enhances key security because the leads are not exposed to the outer edges of the package. Key Features • 4096-Byte Nonimprinting Key Memory with High-Speed Erase • Optional External SRAM Clear Upon Qualified Tamper Event • 64-Byte General-Purpose RAM Not Cleared • 32-Bit Seconds Counter • Watchdog Timer • CPU Supervisor • Four General-Purpose Tamper-Detect Comparators • Four Window Comparators with On-Chip Reference Voltages • Two Tamper-Detect Logic Inputs • On-Chip, Programmable Temperature Sensing with Proprietary Rate-of-Change Detector • On-Chip Random-Number Generator RNG • Latching and Timestamping of Tamper Events • Crystal Oscillator Tamper Monitoring • Low-Power Consumption • Wide Temperature Range -55°C to +95°C • CSBGA Package 7mm x 7mm x 0.8mm with No Horizontally Exposed Leads • Interface Applications/Uses • Alarm Systems • Gaming • IT Security • Point-of-Sale Terminals • Routers/Switches Analog Voltages Monitored Digital Inputs Monitored DS3645 12 Internal Key Memory Bytes Package/PinsOper. Temp. °C 4096 CSBGA/49 -55 to +95 DS3645B+ DS3645B+TRL DS3645K DS3645B-TRL DS3645B-W+ Status Active Active NLA Active NLA Carrier Type Tray Reel Box Reel Tray Package CSBGA 49Pin 49mm2; CSBGA 49Pin 49mm2; CSBGA 49Pin 49mm2 CSBGA 49Pin 49mm2 CSBGA 49Pin 49mm2;

PDF Datasheet Preview

DS3645
4KB Secure Memory with Tamper Protection for Network Server Applications

Single-Chip Solution Integrates Advanced Physical Security with On-Chip Encryption Key Memory

NDA Required. Request Full Data Sheet

The DS3645 is a secure supervisor with 4096 bytes of SRAM for applications requiring the secure storage of sensitive data and the physical tamper-sensing response functions required in cryptographic processors and data security equipment.

One of the DS3645's primary features is the on-chip encryption key memory, consisting of 32 128-byte banks incorporating a high-speed, direct-clearing function. The 4KB key memory is constantly complemented in the background to prevent memory imprinting. In the event of a qualified tamper event, the key memory is rapidly cleared and a negative bias is applied to clear SRAM external to the DS3645.

The device includes a real-time seconds counter, watchdog timer, CPU supervisor, nonvolatile NV SRAM controller, 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, seconds counter, and tamper-detection circuitry active. The DS3645 provides low-leakage tamper-detection inputs for interface to external sensors, interlocks, and antitamper meshes. The DS3645 also invokes a tamper event if the backup battery drops below a specified threshold or absolute temperature, if the temperature rate-of-change exceeds programmed limits, or if the crystal oscillator frequency falls outside a specified window. The tamper event is latched and timestamped for future debugging purposes.

Access to the seconds counter, tamper monitoring, key memory, and device configuration is conducted through an I2-C-compatible interface. The DS3645 is assembled in a CSBGA package, which enhances key security because the leads are not exposed to the outer edges of the package.

Key Features
• 4096-Byte Nonimprinting Key Memory with High-Speed Erase
• Optional External SRAM Clear Upon Qualified Tamper Event
• 64-Byte General-Purpose RAM Not Cleared
• 32-Bit Seconds Counter
• Watchdog Timer
• CPU Supervisor
• Four General-Purpose Tamper-Detect Comparators
• Four Window Comparators with On-Chip Reference Voltages
• Two Tamper-Detect Logic Inputs
• On-Chip, Programmable Temperature Sensing with Proprietary Rate-of-Change

Detector
• On-Chip Random-Number Generator RNG
• Latching and Timestamping of Tamper Events
• Crystal Oscillator Tamper Monitoring
• Low-Power Consumption
• Wide Temperature Range -55°C to +95°C
• CSBGA Package 7mm x 7mm x 0.8mm with No Horizontally Exposed Leads
• Interface

Applications/Uses
• Alarm Systems
• Gaming
• IT Security
• Point-of-Sale Terminals
• Routers/Switches

Analog Voltages Monitored

Digital Inputs Monitored

DS3645 12

Internal Key Memory Bytes

Package/PinsOper. Temp. °C
4096

CSBGA/49 -55 to +95

DS3645B+

DS3645B+TRL DS3645K DS3645B-TRL DS3645B-W+

Status

Active

Active NLA Active NLA

Carrier Type

Tray

Reel Box Reel Tray

Package

CSBGA 49Pin 49mm2;

CSBGA 49Pin 49mm2;

CSBGA 49Pin 49mm2 CSBGA 49Pin 49mm2 CSBGA 49Pin 49mm2;

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Datasheet ID: DS3645K 647188