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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
MAX36025B, MAX36025B+TRL

Industry's First Security Manager with Dual Encryption Engines, Authentication, and Tamper-Detection Hierarchy
QV    NV SRAM Security Manager with 128 Bytes of Internal Nonimprinting Memory, RTC, and Supervisor with Tamper Detection
MAX36051B

Single-Chip Solution Provides Security, Tamper Detection, and Encryption-Key Destruction in Event of Tamper
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:  Timekeeping & Real-Time Clocks
Part Number Functions Date/ Time Format Interface VSUPPLY
(V)
Time Keeping Current
(nA)
CL
(pF)
Memory Type Memory Size
(Bytes)
Time of Day Alarms
hh = sec/100 typ
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 (80)

Key Specifications:  Secure Supervisors
Part Number Analog Voltages Monitored Digital Inputs Monitored Internal Key Memory
(Bytes)
Ext. Memory Cntrl. Random Number Gen. Over Voltage Monitor Battery Monitor RoHS Available Package/Pins Smallest Available Pckg.
(mm2)
Oper. Temp.
(°C)
max w/pins
DS3655  - 4 64 No No No No Yes
CSBGA/16
16 -40 to +85
DS3650  2 - - No Yes Yes
CSBGA/16
16
DS3640  5 3 1024 Yes Yes Yes
CSBGA/25
25
DS3641  5 3 1024 Yes Yes Yes
CSBGA/25
25
See All Secure Supervisors (7)



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