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Maxim > 方案 > HVAC
实时时钟
提供时间信息，具有闹钟、定时中断、方波输出、复位及看门狗定时器等功能。
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| 显示 |
标题/型号 |
关键优势 |
| 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 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 |
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 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 |
3线串行RTC，TDFN封装
MAX6901
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| QV PDF |
SPI兼容RTC，TDFN封装
MAX6902
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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) |
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DS32B35
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32.768kHz
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TCXO
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Digital
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CMOS Open-Drain
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2
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3.5
|
1 (typ)
|
5 (0-10 Years)
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2.7 to 3.63
3.3
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DS32C35
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32.768kHz
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TCXO
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Digital
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CMOS Open-Drain
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2
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3.5
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1 (typ)
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5 (0-10 Years)
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2.7 to 3.63
3.3
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| See All Oscillator Modules (26) |
| Key Specifications:
Timekeeping & Real-Time Clocks |
| Part Number |
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 |
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DS32B35
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HH:MM:SS
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YY-MM-DD
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I2C
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2.7 to 3.63
3.3
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840
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-
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FRAM
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2K
8K
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-
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DS32C35
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HH:MM:SS
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YY-MM-DD
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I2C
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2.7 to 3.63
3.3
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840
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-
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FRAM
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2K
8K
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-
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DS1390
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HH:MM:SS:hh
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YY-MM-DD
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SPI
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1.8
3
3.3
5
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500
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6
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None
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-
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1
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DS1391
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HH:MM:SS:hh
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YY-MM-DD
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SPI
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1.8
3
3.3
5
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500
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6
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None
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-
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1
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DS1392
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HH:MM:SS:hh
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YY-MM-DD
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3-Wire
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1.8
3
3.3
5
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500
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6
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None
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-
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1
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DS1393
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HH:MM:SS:hh
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YY-MM-DD
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3-Wire
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1.8
3
3.3
5
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500
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6
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None
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-
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1
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DS1340
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HH:MM:SS
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YY-MM-DD
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I2C
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1.8
3
3.3
5
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800
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12.5
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None
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-
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0
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DS1338
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HH:MM:SS
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YY-MM-DD
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I2C
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1.8
3
3.3
5
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800
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12.5
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NV SRAM
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56
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0
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DS1339
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HH:MM:SS
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YY-MM-DD
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I2C
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2
3
3.3
5
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400
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6
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None
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-
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2
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DS1337
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HH:MM:SS
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YY-MM-DD
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I2C
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2
3
3.3
5
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425
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6
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None
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-
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2
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MAX6901
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HH:MM:SS
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YYYY-MM-DD
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3-Wire
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2
3
3.3
5
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600
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12.5
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NV SRAM
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31
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1
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MAX6902
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HH:MM:SS
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YYYY-MM-DD
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SPI
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2
3
3.3
5
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600
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12.5
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NV SRAM
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31
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1
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| See All Timekeeping & Real-Time Clocks (86) |
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