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| 型号： | DS1673S-3+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 16/18页 |
| 文件大小： | 0K |
| 描述： | IC CTRLR SYSTEM PORT 3V 20-SOIC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 37 |
| 类型： | 便携系统控制器 |
| 特点： | 警报器，闰年，监视计时器 |
| 时间格式： | HH:MM:SS（12/24 小时） |
| 数据格式： | YY-MM-DD-dd |
| 接口： | 3 线串口 |
| 电源电压： | 2.7 V ~ 3.3 V |
| 电压 - 电源，电池： | 2.5 V ~ 3.7 V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 20-SOIC W |
| 包装： | 管件 |
| 产品目录页面： | 1434 (CN2011-ZH PDF) |
DS1673
7 of 18
STATUS REGISTER
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
CU
LOBAT
0
IRQF
CU (Conversion Update In Progress). When this bit is a 1, an update to the ADC Register (register
0Eh) will occur within 488
s. When this bit is a 0, an update to the ADC Register will not occur for at
least 244
s.
LOBAT (Low Battery Flag). This bit reflects the status of the backup power source connected to the
VBAT pin. When VBAT is greater than 2.5V, LOBAT is set to a logic 0. When VBAT is less than 2.3V,
LOBAT is set to a logic 1.
IRQF (Interrupt Request Flag). A logic 1 in the Interrupt Request Flag bit indicates that the current
time has matched the time of day Alarm registers. If the AIE bit is also a logic 1, the INT pin will go
high. IRQF is cleared by reading or writing to any of the alarm registers.
POWER-UP DEFAULT STATES
These bits are set to a one upon initial power-up: EOSC , TD1 and TD0. These bits are cleared upon
initial power-up: WP, AIS1, and AIS0.
NONVOLATILE SRAM CONTROLLER
The DS1673 provides automatic backup and write protection for external SRAM. This function is
provided by gating the chip enable signals and by providing a constant power supply through the VCCO
pin. The DS1673 was specifically designed with the Intel 80186 and 386EX microprocessors in mind. As
such, the DS1673 has the capability to provide access to the external SRAM in either byte-wide or word-
wide format. This capability is provided by the chip enable scheme. Three input signals and two output
signals are used for enabling the external SRAM(s) (see Figure 4). CEI (chip enable in), BHE (byte high
enable), and BLE (byte low enable) are used for enabling either one or two external SRAMs through the
CEOL
(chip enable low) and the CEOH (chip enable high) outputs. Table 3 illustrates the function of
these pins.
The DS1673 nonvolatilizes the external SRAM(s) by write-protecting the SRAM(s) and by providing a
back-up power supply in the absence of VCC. When VCC falls below VPF, access to the external SRAM(s)
are prohibited by forcing CEOL and CEOH high regardless of the level of CEI , BLE , and BHE . Upon
power-up, access is prohibited until the end of tRPU.
EXTERNAL SRAM CHIP ENABLE Table 3
CEI
BHE
BLE
CEOL
CEOH
FUNCTION
0
Word transfer
0
1
0
Byte transfer in upper half of data bus (D15-D8)
0
1
0
1
Byte transfer in lower half of data bus (D7-D0)
0
1
External SRAMs disabled
1
X
1
External SRAMs disabled
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| DS1673S-3+ | 功能描述:实时时钟 Portable System Controller 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 |
| DS1673S-5 | 功能描述:实时时钟 Portable System Controller 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 |
| DS1673S-5+ | 功能描述:实时时钟 Portable System Controller 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 |
| DS1673S-5+T&R | 制造商:Maxim Integrated Products 功能描述:PRTBLE CNTRL 20PSOIC 5V LFREE TR - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC CTRLR SYSTEM PORT 5V 20-SOIC 制造商:Maxim Integrated Products 功能描述:Real Time Clock Portable System Controller |
| DS1673S-5+T&R | 功能描述:实时时钟 Portable System Controller 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 |
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