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参数资料
| 型号： | DS1646-120+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 7/12页 |
| 文件大小： | 0K |
| 描述： | IC RAM TIMEKEEP NV 120NS 32-EDIP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 12 |
| 类型： | 时钟/日历 |
| 特点： | 闰年，NVSRAM |
| 存储容量： | 128KB |
| 时间格式： | HH:MM:SS（24 小时） |
| 数据格式： | YY-MM-DD-dd |
| 接口： | 并联 |
| 电源电压： | 4.5 V ~ 5.5 V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 通孔 |
| 封装/外壳： | 32-DIP 模块（0.600"，15.24mm） |
| 供应商设备封装： | 32-EDIP |
| 包装： | 管件 |
| 产品目录页面： | 1432 (CN2011-ZH PDF) |
DS1646/DS1646P
4 of 12
BLOCK DIAGRAM DS1646 Figure 1
TRUTH TABLE DS1646 Table 1
VCC
CE
OE
WE
MODE
DQ
POWER
5V ± 10%
VIH
X
DESELECT
HIGH-Z
STANDBY
X
DESELECT
HIGH-Z
STANDBY
VIL
X
VIL
WRITE
DATA IN
ACTIVE
VIL
VIH
READ
DATA OUT
ACTIVE
VIL
VIH
READ
HIGH-Z
ACTIVE
<4.5V >VBAT
X
DESELECT
HIGH-Z
CMOS STANDBY
<VBAT
X
DESELECT
HIGH-Z
DATA RETENTION
MODE
SETTING THE CLOCK
The MSB Bit, B7, of the control register is the write bit. Setting the write bit to a 1, like the read bit halts
updates to the DS1646 registers. The user can then load them with the correct day, date and time data in
24-hour BCD format. Resetting the write bit to a 0 then transfers those values to the actual clock counters
and allows normal operation to resume.
STOPPING AND STARTING THE CLOCK OSCILLATOR
The clock oscillator may be stopped at any time. To increase the shelf life, the oscillator can be turned off
to minimize current drain from the battery. The OSC bit is the MSB for the second’s registers. Setting it
to a 1 stops the oscillator.
FREQUENCY TEST BIT
Bit 6 of the day byte is the frequency test bit. When the frequency test bit is set to logic 1 and
the oscillator is running, the LSB of the second’s register will toggle at 512 Hz. When the seconds
register is being read, the DQ0 line will toggle at the 512 Hz frequency as long as conditions for access
remain valid (i.e., CE low, OE low, and address for seconds register remain valid and stable).
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PDF描述 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1646-120+ | 功能描述:实时时钟 NV Timekeeping RAM 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 |
| DS1646-15 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:NVRAM (Battery Based) |
| DS1646H-120 | 功能描述:实时时钟 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 |
| DS1646L-12 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:NVRAM (Battery Based) |
| DS1646L-120 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:NVRAM (Battery Based) |
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