Maxim > 方案 > 网络集线器、交换机和路由器
实时时钟
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| 显示 |
标题/型号 |
关键优势 |
| 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 |
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NV RAM
DS1338, DS1338C, DS1338U, DS1338Z
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| 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
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| QV PDF |
便携系统控制器
DS1673
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| QV PDF |
I²C、32位二进制计数器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
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| 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) |
|
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
|
| See All Oscillator Modules (28) |
| 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 |
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DS3234
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-
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YY-MM-DD/ HH:MM:SS
|
SPI
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2.7 to 5.5
3
3.3
5
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1,500
|
-
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NV SRAM
|
256
|
2
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DS1394
|
-
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YY-MM-DD/ HH:MM:SS:hh
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SPI
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3.3
5
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500
|
6
|
None
|
-
|
1
|
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DS1390
|
-
|
YY-MM-DD/ HH:MM:SS:hh
|
SPI
|
1.8
3
3.3
5
|
500
|
6
|
None
|
-
|
1
|
|
DS1391
|
-
|
YY-MM-DD/ HH:MM:SS:hh
|
SPI
|
1.8
3
3.3
5
|
500
|
6
|
None
|
-
|
1
|
|
DS1392
|
-
|
YY-MM-DD/ HH:MM:SS:hh
|
3-Wire
|
1.8
3
3.3
5
|
500
|
6
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None
|
-
|
1
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|
DS1393
|
-
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YY-MM-DD/ HH:MM:SS:hh
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3-Wire
|
1.8
3
3.3
5
|
500
|
6
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None
|
-
|
1
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|
DS12CR887
|
-
|
YY-MM-DD/ HH:MM:SS
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Multiplexed
|
3.3
5
|
-
|
-
|
NV SRAM
|
114
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1
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DS12R885
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-
|
YY-MM-DD/ HH:MM:SS
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Multiplexed
|
3.3
5
|
800
|
12.5
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NV SRAM
|
114
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1
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DS12R887
|
-
|
YY-MM-DD/ HH:MM:SS
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Multiplexed
|
3.3
5
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-
|
-
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NV SRAM
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114
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1
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DS1318
|
|
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
|
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DS1374
|
|
Binary
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I2C
|
1.8
3
3.3
5
|
400
|
6
|
None
|
-
|
1
|
|
DS1338
|
-
|
YY-MM-DD/ HH:MM:SS
|
I2C
|
1.8
3
3.3
5
|
800
|
12.5
|
NV SRAM
|
56
|
0
|
|
DS1339
|
-
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YY-MM-DD/ HH:MM:SS
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I2C
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2
3
3.3
5
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400
|
6
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None
|
-
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2
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|
DS1337
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-
|
YY-MM-DD/ HH:MM:SS
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I2C
|
2
3
3.3
5
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425
|
6
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None
|
-
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2
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DS1670
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|
YY-MM-DD/ HH:MM:SS
|
3-Wire
|
3.3
|
300
|
6
|
None
|
-
|
1
|
|
DS1672
|
|
Binary
|
I2C
|
2
3
3.3
|
425
|
6
|
None
|
-
|
0
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|
DS1673
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|
YY-MM-DD/ HH:MM:SS
|
3-Wire
|
3
5
|
300
|
6
|
None
|
-
|
1
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DS1677
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|
YY-MM-DD/ HH:MM:SS
|
3-Wire
|
5
|
300
|
6
|
None
|
-
|
1
|
| See All Timekeeping & Real-Time Clocks (85) |
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