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Maxim > 方案 > 安全系统

实时时钟

数据资料
显示 标题/型号 关键优势
QV    超低功耗篡改检测电路，带有无痕迹存储器
DS3655

具有安全、防篡改检测、加密存储功能的单芯片方案，发生篡改事件时擦除加密数据
QV    NV SRAM控制器、RTC及监控电路，带有篡改检测
DS3650

具有安全、防篡改检测的单芯片方案，发生篡改事件时擦除加密数据
QV    兼容于SPI™的安全监控电路，具有1kB加密保护存储器
DS3641

具有安全、防篡改检测、加密存储功能的单芯片方案，发生篡改事件时擦除加密数据
QV  PDF 高精度、I²C RTC，集成TCXO/晶体/FRAM
DS32B35, DS32C35

非易失存储器，无需备份电源、不受写次数限制
QV    安全监控电路，带有64B电池备份、加密SRAM
DS3600

具有安全、防篡改检测、加密存储功能的单芯片方案，发生篡改事件时擦除加密数据
QV  PDF 低电压SPI/3线接口RTC，带有涓流充电器
DS1390, DS1391, DS1392, DS1393, DS1394

低电压、SPI™/3线接口RTC，带有涓流充电器，与同类产品相比具有更多功能和更小尺寸
QV  PDF 带有恒压涓流充电器的RTC
DS12CR887, DS12R885, DS12R887
QV  PDF 并行接口历时计数器
DS1318

亚秒级历时计数器，提供244µs分辨率
QV  PDF I²C RTC，带有涓流充电器
DS1340, DS1340C

I²C实时时钟，带有涓流充电器，可通过软件进行校准
QV  PDF I²C、32位二进制计数器看门狗RTC，带有涓流充电器和复位输入/输出
DS1374, DS1374C, DS1374U

历时计数器，提供上电复位、看门狗或闹钟、方波输出
QV  PDF I²C RTC，带有56字节非易失RAM
DS1338, DS1338C, DS1338U, DS1338Z
QV  PDF I²C串行实时时钟
DS1339, DS1339C, DS1339U

RTC的多种可编程特性为系统提供更多灵活性
QV  PDF I²C、32位二进制计数RTC
DS1672

低电压串行时钟芯片，内部包括超低电压时钟、电源监视电路、电源失效开关和涓流充电选项，单一芯片可替代多个分立元件
QV  PDF Y2K兼容、看门狗RTC，带有非易失控制
DS1500



Key Specifications:   Non-Volatile RAM Controllers
Part Number CE Control Smart-Socket with Internal Battery Li Battery Monitor Power Fail Output Number of RAMs Controlled RESET Output Supply Voltage (V) Package Operating Temp. Range (°C)
DS1500  Yes No Yes No 1 Yes 3.3
5 		TSOP/32 -40 to +85
See All Non-Volatile RAM Controllers (16)

Key Specifications:   Oscillator Modules
Part Number Frequency Oscillator Type Tuning Adjustment Type Frequency Output Type Freq. Stability vs. Temp. @0 to +40°C (±ppm) Freq. Stab. vs.Temp. @-40 to 0/ +40 to 85°C (±ppm) Frequency Stability vs. Supply Voltage (±ppm/V) Frequency Stability vs. Aging (±ppm) Supply Voltage (V) Battery Voltage (V) Package Operating Temp. Range (°C)
DS32B35  32.768kHz TCXO Digital CMOS Open-Drain 2 3.5 1 (typ) 5 (0-10 Years) 2.7 to 3.63
3.3 		2.3 to 3.6 SOIC/20 -40 to +85
0 to +70
DS32C35  32.768kHz TCXO Digital CMOS Open-Drain 2 3.5 1 (typ) 5 (0-10 Years) 2.7 to 3.63
3.3 		2.3 to 3.6 SOIC/20 -40 to +85
0 to +70
See All Oscillator Modules (26)

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 Operating Temp. Range (°C)
DS3650  2  -   -  No No Yes Yes -40 to +85
DS3600  4 1 64 Yes Yes No Yes -40 to +85
DS3641  5 3 1024 No Yes Yes Yes -40 to +85
DS3655   -  4 64 No No No No -40 to +85
See All Secure Supervisors (7)

Key Specifications:   Timekeeping & Real-Time Clocks
Part Number Functions Time Format (hh = sec/100) Date Format Interface Supply Voltage (V) Time- keeping Current (typ) (nA) CL, Load Capacitance (pF) Memory Type Memory Size (Bytes) Number of Time of Day Alarms Features Package Operating Temp. Range (°C)
DS1500 
•NV SRAM Control
•Watchdog Timekeeper
 HH:MM:SS YY-MM-DD Bytewide 3.3
5 		 -  12.5
6 		NV SRAM 256 1
•µP Reset
•Kick-Start
•Periodic Interrupt
•Square-Wave Output
•Wake-up
 TSOP/32 -40 to +85
DS32B35   -  HH:MM:SS YY-MM-DD I2C 2.7 to 3.63
3.3 		840  -  FRAM 2K
8K 		 - 
•µP Reset
•Power Fail Output
•SOIC Package with Integrated Crystal
•Square-Wave Output
 SOIC/20 -40 to +85
0 to +70
DS32C35   -  HH:MM:SS YY-MM-DD I2C 2.7 to 3.63
3.3 		840  -  FRAM 2K
8K 		 - 
•µP Reset
•Power Fail Output
•SOIC Package with Integrated Crystal
•Square-Wave Output
 SOIC/20 -40 to +85
0 to +70
DS1390   -  HH:MM:SS:hh YY-MM-DD SPI 1.8
3
3.3
5 		500 6 None  -  1
•Square-Wave Output
•Trickle Charger
 uSOP/10 -40 to +85
DS1391   -  HH:MM:SS:hh YY-MM-DD SPI 1.8
3
3.3
5 		500 6 None  -  1
•µP Reset
•Power Fail Output
•Trickle Charger
 uSOP/10 -40 to +85
DS1392   -  HH:MM:SS:hh YY-MM-DD 3-Wire 1.8
3
3.3
5 		500 6 None  -  1
•Square-Wave Output
•Trickle Charger
 uSOP/10 -40 to +85
DS1393   -  HH:MM:SS:hh YY-MM-DD 3-Wire 1.8
3
3.3
5 		500 6 None  -  1
•µP Reset
•Power Fail Output
•Trickle Charger
 uSOP/10 -40 to +85
DS12CR887   -  HH:MM:SS YY-MM-DD Multiplexed 3.3
5 		 -   -  NV SRAM 114 1
•Battery + Crystal
•Periodic Interrupt
•Square-Wave Output
 MOD/24 -40 to +85
DS12R885   -  HH:MM:SS YY-MM-DD Multiplexed 3.3
5 		800 12.5 NV SRAM 114 1
•Periodic Interrupt
•Square-Wave Output
 SOIC/24 -40 to +85
DS12R887   -  HH:MM:SS YY-MM-DD Multiplexed 3.3
5 		 -   -  NV SRAM 114 1
•Battery + Crystal
•Periodic Interrupt
•Square-Wave Output
 BGA/48 -40 to +85
DS1318 
•Elapsed Time Counter
 Binary Binary Bytewide 3.3 750 12.5 None  -  1
•Periodic Interrupt
 TSSOP/24 -40 to +85
DS1340   -  HH:MM:SS YY-MM-DD I2C 1.8
3
3.3
5 		800 12.5 None  -  0
•SOIC Package with Integrated Crystal
•Square-Wave Output
•Trickle Charger
 SOIC/16
SOIC/8
uSOP/8 		-40 to +85
DS1374 
•Elapsed Time Counter
•Watchdog Timekeeper
 Binary Binary I2C 1.8
3
3.3
5 		400 6 None  -  1
•µP Reset
•Periodic Interrupt
•SOIC Package with Integrated Crystal
•Trickle Charger
 SOIC/16
uSOP/10 		-40 to +85
DS1338   -  HH:MM:SS YY-MM-DD I2C 1.8
3
3.3
5 		800 12.5 NV SRAM 56 0
•SOIC Package with Integrated Crystal
•Square-Wave Output
 SOIC/16
SOIC/8
uSOP/8 		-40 to +85
DS1339   -  HH:MM:SS YY-MM-DD I2C 2
3
3.3
5 		400 6 None  -  2
•SOIC Package with Integrated Crystal
•Square-Wave Output
•Trickle Charger
 SOIC/16
uSOP/8 		-40 to +85
DS1672 
•Elapsed Time Counter
 Binary Binary I2C 2
3
3.3 		425 6 None  -  0
•Trickle Charger
 PDIP/8
SOIC/8
uSOP/8 		-40 to +85
See All Timekeeping & Real-Time Clocks (86)


         


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