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Maxim > 方案 > 网络集线器、交换机和路由器

实时时钟

数据资料
显示 标题/型号 关键优势
QV  PDF 低电压SPI/3线RTC，带有涓流充电器
DS1390, DS1391, DS1392, DS1393

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 高精度、SPI总线RTC，集成晶体和SRAM
DS3234

完全集成的高精度时钟方案，在整个工业级温度范围内精度优于±2.0分钟/年，无需用户校准
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串行实时时钟
DS1337, DS1337C

业内尺寸最小的I²C RTC，带有两个定时闹钟
QV  PDF 便携系统控制器
DS1677
QV  PDF 便携系统控制器
DS1673
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 便携系统控制器
DS1670



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) Industry Qualified Package Smallest Available Package (max w/pins) (mm2) Operating Temp. Range (°C)
DS3234  32.768kHz TCXO Digital CMOS Push-Pull 2 3.5 1 (typ) 5 (0-10 Years) 2.7 to 5.5
3
3.3
5 		2.3 to 3.8 Automotive - General SOIC/20 99 -40 to +85
0 to +70
See All Oscillator Modules (23)

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 Industry Qualified Package Smallest Available Package (max w/pins) (mm2) Operating Temp. Range (°C)
DS3234   -  HH:MM:SS YY-MM-DD SPI 2.7 to 5.5
3
3.3
5 		1,500  -  NV SRAM 256 2
•µP Reset
•Power Fail Output
•SOIC Package with Integrated Crystal
•Square-Wave Output
 Automotive - General SOIC/20 99 -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 15 -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 15 -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 15 -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 15 -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/24 640 -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/24 118 -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/48 181 -40 to +85
DS1318 
•Elapsed Time Counter
 Binary Binary Bytewide 3.3 750 12.5 None  -  1
•Periodic Interrupt
  -  TSSOP/24 52 -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 		16 -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 		15 -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 		16 -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 		16 -40 to +85
DS1337   -  HH:MM:SS YY-MM-DD I2C 2
3
3.3
5 		425 6 None  -  2
•SOIC Package with Integrated Crystal
•Square-Wave Output
  -  PDIP/8
SOIC/16
SOIC/8
uSOP/8 		16  - 
DS1670 
•NV SRAM Control
•Watchdog Timekeeper
 HH:MM:SS YY-MM-DD 3-Wire 3.3 300 6 None  -  1
•µP Reset
•A to D Converter
•Periodic Interrupt
•Power Fail Output
  -  SOIC/20
TSSOP/20 		45 0 to +70
DS1672 
•Elapsed Time Counter
 Binary Binary I2C 2
3
3.3 		425 6 None  -  0
•Trickle Charger
  -  PDIP/8
SOIC/8
uSOP/8 		16 -40 to +85
DS1673 
•NV SRAM Control
•Watchdog Timekeeper
 HH:MM:SS YY-MM-DD 3-Wire 3
5 		300 6 None  -  1
•µP Reset
•A to D Converter
•Periodic Interrupt
•Power Fail Output
  -  SOIC/20
TSSOP/20 		45 0 to +70
DS1677 
•NV SRAM Control
•Watchdog Timekeeper
 HH:MM:SS YY-MM-DD 3-Wire 5 300 6 None  -  1
•µP Reset
•A to D Converter
•Periodic Interrupt
•Power Fail Output
  -  TSSOP/20 45 0 to +70
See All Timekeeping & Real-Time Clocks (86)


         


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