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Maxim > Solutions > Computers: Desktops, Workstations, and Servers

Real-Time Clocks

DATA SHEETS
Display Title / Parts Key Advantages
QV    1k x 8 Secure Memory with Programmable Tamper-Detection Hierarchy and RTC
DS3644

Industry's First Secure Memory with Tamper-Detection Hierarchy
QV    Ultra-Low-Power Tamper-Detection Circuit with Nonimprinting Memory
DS3655

Single-Chip Solution Provides Security, Tamper Detection, Encryption-Key Storage, and Encryption-Key Destruction in Event of Tamper
QV    NV SRAM Controller, RTC, and Supervisor with Tamper Detection
DS3650

Single-Chip Solution Provides Security, Tamper Detection, and Encryption-Key Destruction in Event of Tamper
QV    SPI™-Compatible Secure Supervisor with 1kB Nonimprinting Key Memory
DS3641

Single-Chip Solution Provides Security, Tamper-Detection, Encryption-Key Storage, and Encryption-Key Destruction in Event of Tamper
QV    I²C Secure Supervisor with 1kB Nonimprinting Battery-Backed Encryption Key SRAM
DS3640

Single-Chip Solution Providing Security, Tamper Detection, Encryption Key Storage, and Encryption Key Destruction in Event of Tamper
QV  PDF Parallel-Interface Elapsed Time Counter
DS1318

Subsecond Elapsed-Time Counter Offers 244µs Resolution
QV  PDF I²C RTC with Trickle Charger
DS1340, DS1340C

I²C Real-Time Clock with Trickle Charger Offers Software Clock Calibration
QV  PDF I²C RTC with 56-Byte NV RAM
DS1338, DS1338C, DS1338U, DS1338Z

QV  PDF I²C Serial Real-Time Clock
DS1339, DS1339C, DS1339U

RTC Provides System Flexibility with Multiple Programmable Features



Key Specifications:   Secure Supervisors
Part Number Analog Voltages Monitored Digital Inputs Monitored Internal Key Memory (Bytes) External Memory Control Random Number Generator Over-Voltage Monitor Battery Monitor Package Smallest Available Package (max w/pins) (mm2) Operating Temp. Range (°C)
DS3655   -  4 64 No No No No CSBGA/16 16 -40 to +85
DS3650  2  -   -  No No Yes Yes CSBGA/16 16 -40 to +85
DS3640  5 3 1024 No Yes Yes Yes 0/0  -  -40 to +85
DS3641  5 3 1024 No Yes Yes Yes 0/0  -  -40 to +85
See All Secure Supervisors (7)

Key Specifications:   Timekeeping & Real-Time Clocks
Part Number Functions Date/ Time Format (hh = sec/100) Interface Supply Voltage (V) Time- keeping Current (typ) (nA) CL, Load Capacitance (pF) Memory Type Memory Size (Bytes) Number of Time of Day Alarms
DS1318 
Elapsed Time Counter
Binary Bytewide 3.3 750 12.5 None  -  1
DS1340   -  YY-MM-DD/ HH:MM:SS I2C 1.8
3
3.3
5
800 12.5 None  -  0
DS1338   -  YY-MM-DD/ HH:MM:SS I2C 1.8
3
3.3
5
800 12.5 NV SRAM 56 0
DS1339   -  YY-MM-DD/ HH:MM:SS I2C 2
3
3.3
5
400 6 None  -  2
See All Timekeeping & Real-Time Clocks (85)



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