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参数资料
| 型号： | DS1344D-33+T&R |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 10/20页 |
| 文件大小： | 0K |
| 描述： | IC RTC SPI 3.3V 14TDFN-EP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 类型： | 时钟/日历 |
| 特点： | 警报器，闰年，NVRAM，方波输出，涓流充电器 |
| 存储容量： | 96B |
| 时间格式： | HH:MM:SS（12/24 小时） |
| 数据格式： | YY-MM-DD-dd |
| 接口： | SPI |
| 电源电压： | 3 V ~ 5.5 V |
| 电压 - 电源，电池： | 1.3 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 14-WFDFN 裸露焊盘 |
| 供应商设备封装： | 14-TDFN-EP（3x3） |
| 包装： | 标准包装 |
| 其它名称： | DS1344D-33+T&RDKR |
18
Maxim Integrated
Low-Current SPI/3-Wire RTCs
DS1343/DS1344
Reading and Writing in Burst Mode
Burst mode is similar to a single-byte read or write,
except that CE is kept high and additional SCLK cycles
are sent until the end of the burst. The clock registers
and the user RAM can be read or written in burst mode.
The address pointer wraps around to 00h after reaching
1Fh (RTC), and the address pointer wraps around to 20h
after reaching 7Fh (RAM). See Figure 6.
3-Wire Interface
The 3-wire interface mode operates similarly to the SPI
mode. However, in 3-wire mode there is one I/O instead
of separate data-in and data-out signals. The 3-wire
interface consists of the I/O (SDI and SDO pins con-
nected together), CE, and SCLK pins. In 3-wire mode,
each byte is shifted in LSB first, unlike SPI mode, where
each byte is shifted in MSB first.
As is the case with the SPI mode, an address byte is
written to the device followed by a single data byte or
multiple data bytes. Figure 7 illustrates a write cycle, and
Figure 8 illustrates a read cycle. In 3-wire mode, data is
input on the rising edge of SCLK and output on the falling
edge of SCLK.
Applications Information
Power-Supply Decoupling
To achieve the best results when using the devices,
decouple the VCC power supply with a 0.01F and/or
0.1F capacitor. Use a high-quality, ceramic, surface-
mount capacitor if possible. Surface-mount components
minimize lead inductance, which improves performance,
and ceramic capacitors tend to have adequate high-
frequency response for decoupling applications.
Using Open-Drain Outputs
The INT0 and INT1 outputs are open drain and therefore
require external pullup resistors to realize a logic-high
output level.
Battery Charge Protection
The devices contain Maxim’s redundant battery-charge
protection circuit to prevent any charging of an external
battery. The DS1343 and DS1344 are recognized by
Underwriters Laboratories (UL) under file E141114.
Figure 7. 3-Wire Single-Byte Write
Figure 8. 3-Wire Single-Byte Read
D7
D6
D5
D4
D3
D2
D1
D0
1
A6
A5
A4
A3
A2
A1
A0
CE
SCLK
I/O*
*I/O IS SDI AND SDO CONNECTED TOGETHER.
SERMODE = GND.
HIGH-Z
R/W
A6
A5
A4
A3
A2
A1
A0
CE
SCLK
HIGH-Z
*I/O IS SDI AND SDO CONNECTED TOGETHER.
SERMODE = GND
I/O*
0
D0
D1
D2
D3
D4
D5
D6
D7
R/W
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1344E-18+ | 功能描述:实时时钟 Low-Current SPI/3-Wire RTC RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
| DS1344E-18+T&R | 制造商:Maxim Integrated Products 功能描述:SPI RTC 20P TSSOP 1.8V 12.5PF A T&R - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC RTC SPI 1.8V 20TSSOP 制造商:Maxim Integrated Products 功能描述:Real Time Clock Low-Current SPI/3-Wire RTC |
| DS1344E-18+T&R | 功能描述:实时时钟 Low-Current SPI/3-Wire RTC RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
| DS1344E-3+ | 功能描述:实时时钟 Low-Current SPI/3-Wire RTC RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
| DS1344E-3+T&R | 制造商:Maxim Integrated Products 功能描述:SPI RTC 20P TSSOP 3V 12.5PF AM T&R - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC RTC SPI 3.0V 20TSSOP |
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