ABRIDGED DATA SHEET DS3640 DeepCover Security Manager with I2C Interface and 1KB Nonimprinting Battery-Backed Encryption Key SRAM General Description Features DeepCover(R) embedded security solutions cloak-sensitive data under multiple layers of advanced physical security to provide the most secure key storage possible. S 1024-Byte Nonimprinting Key Memory with HighSpeed Erase The DeepCover Security Manager (DS3640) is a secure supervisor with 1024 bytes of SRAM for applications requiring the secure storage of encryption keys, including POS terminals. The 1KB key memory is constantly complemented in the background to prevent oxide stress and memory imprint-ing. In the event of a qualified tamper event, the key memory is rapidly cleared. S Real-Time Clock with Leap Year Compensation Valid Up to 2100 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 bat-tery 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 I2Ccompatible interface. The DS3640 is assembled in a Pb-free CSBGA package, which enhances key security in that the leads are not exposed to the outer edges of the package. S 64-Byte General-Purpose RAM (Not Cleared) S Watchdog Timer S CPU Supervisor S Four General-Purpose Tamper-Detect Comparators with Associated Reference S Three Tamper-Detect Logic Inputs S On-Chip Programmable Temperature Sensing with Proprietary Rate-of-Change Detector S On-Chip Random Number Generator (RNG) S Latching and Time Stamping of Tamper Events S Crystal Oscillator Tamper Monitoring S Low Power Consumption S 3.0V to 3.6V Single-Supply Operation S CSBGA Package with No Horizontally Exposed Leads Ordering Information PART TEMP RANGE PIN-PACKAGE DS3640B+ -40NC to +85NC 25 CSBGA DS3640B+TRL -40NC to +85NC 25 CSBGA +Denotes a lead(Pb)-free/RoHS-compliant package. TRL = Tape and reel. Applications Point-of-Sale Terminals Gaming Routers/Switches IT Security Alarm Systems DeepCover is a registered trademark of Maxim Integrated Products, Inc. EMV is a registered trademark of EMVCo LLC. For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated's website at www.maximintegrated.com. 119-0008; Rev 10; 6/17 ABRIDGED DATA SHEET DS3640 DeepCover Security Manager with I2C Interface and 1KB Nonimprinting Battery-Backed Encryption Key SRAM Functional Diagram CLOCK CONTROL OSCILLATOR MONITOR OSCILLATOR AND DIVIDER POWER MANAGEMENT CONTROLLER CLOCK REGISTERS ALARM REGISTERS I2C 64 BYTES GENERAL-PURPOSE RAM (NOT CLEARED) INTERFACE ALM WATCHDOG REGISTERS CPU SUPERVISOR TEMP SENSOR CONTROL STATUS AND TAMPER INPUT REGISTERS 64-BIT SERIAL NUMBER RANDOM-NUMBER GENERATOR A/D VOLTAGE REFERENCE A/D REGISTERS BATTERY AND TEMPERATURE BATTERY MONITOR 1KB PAGE-SELECTABLE KEY MEMORY FRESHNESS SEAL TIME-STAMP MEMORY GLITCH FILTER TEMPERATURE TAMPER DETECT TAMPER INPUTS TAMPER EVENT STATE MACHINE AND SIGNAL ROUTING LOGIC GLITCH FILTER DS3640 GLITCH FILTER Maxim Integrated 2 ABRIDGED DATA SHEET DS3640 DeepCover Security Manager with I2C Interface and 1KB Nonimprinting Battery-Backed Encryption Key SRAM Typical Operating Circuit +3.3V VCCI POWER-FAIL DETECTION PFC POWER FOR EXTERNAL CIRCUITRY VCCO ALM TEI PFCO EXTERNAL BATTERY PACK ALARM MONITORS RST TD1 TAMPERDETECT INPUTS CPU TD2 DS3640 TD3 SECURE MEMORY WITH RTC AND TAMPER DETECT SCL SDA I 2C INTERFACE VBAT BBO TC1+ TAMPERCOMPARATOR INPUTS TC2- BATTERY-ON INDICATOR TC3+ TC4X1 X2 GND 32.768kHz Package Information For the latest package outline information and land patterns (footprints), go to www.maximintegated.com/packages. Note that a "+", "#", or "-" in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. PACKAGE TYPE PACKAGE CODE OUTLINE NO. LAND PATTERN NO. 25 CSBGA X25+2 21-0361 90-0298 Maxim Integrated 3 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Maxim Integrated: DS3640B+ DS3640K