参数资料
| 型号： | DS1390U-33+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 10/26页 |
| 文件大小： | 0K |
| 描述： | IC RTC W/CHARGER 10-USOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 50 |
| 类型： | 时钟/日历 |
| 特点： | 警报器，闰年，方波输出，涓流充电器 |
| 时间格式： | HH:MM:SS:hh（12/24 小时） |
| 数据格式： | YY-MM-DD-dd |
| 接口： | SPI |
| 电源电压： | 2.97 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： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 10-µMAX |
| 包装： | 管件 |
| 产品目录页面： | 1434 (CN2011-ZH PDF) |
DS1390–DS1394
Low-Voltage SPI/3-Wire RTCs with
Trickle Charger
18
Maxim Integrated
Bit 7: Oscillator Stop Flag (OSF). A logic 1 in this bit
indicates that the oscillator has stopped or was
stopped for some time and may be used to judge the
validity of the clock and calendar data. This bit is
edge-triggered and is set to logic 1 when the internal
circuitry senses the oscillator has transitioned from a
normal run state to a STOP condition. The following are
examples of conditions that can cause the OSF bit to
be set:
1) The first time power is applied.
2) The voltage present on VCC and VBACKUP is
insufficient to support oscillation.
3) The EOSC bit is turned off.
4) External influences on the crystal (i.e., noise,
leakage, etc.).
This bit remains at logic 1 until written to logic 0. This
bit can only be written to logic 0. Attempting to write
OSF to logic 1 leaves the value unchanged.
Bit 6: Alarm Flag (AF). A logic 1 in the AF bit indicates
that the time matched the alarm registers. If the AIE bit
The INTCN bit used in the DS1390/DS1393/DS1394
becomes the SQW pin-enable bit in the DS1392. This
bit powers up a zero, making SQW active.
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
EOSC
0
BBSQI
RS2
RS1
ESQW
0
AIE
Control Register (0D/8Dh) (DS1392 Only)
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
OSF
00
0000
AF
Status Register (0E/8Eh)
is logic 1 and the INTCN bit is set to logic 1, the
SQW/INT pin is also asserted. AF is cleared when writ-
ten to logic 0. This bit can only be written to logic 0.
Attempting to write to logic 1 leaves the value
unchanged.
Trickle-Charge Register (0F/8Fh)
The simplified schematic in Figure 8 shows the basic
components of the trickle charger. The trickle-charge
select (TCS) bits (bits 4 to 7) control the selection of
the trickle charger. To prevent accidental enabling,
only a pattern on 1010 enables the trickle charger. All
other patterns disable the trickle charger. The trickle
charger is disabled when power is first applied. The
diode-select (DS) bits (bits 2 and 3) select whether or
not a diode is connected between VCC and VBACKUP.
If DS is 01, no diode is selected or if DS is 10, a diode
is selected. The ROUT bits (bits 0 and 1) select the
value of the resistor connected between VCC and
VBACKUP. Table 5 shows the resistor selected by the
resistor-select (ROUT) bits and the diode selected by
the diode-select (DS) bits.
TCS3
TCS2
TCS1
TCS0
DS1
DS0
ROUT1
ROUT0
FUNCTION
X
0
X
Disabled
X
1
X
Disabled
X
0
Disabled
101
00101
No diode, 250
resistor
101
01001
One diode, 250
resistor
101
00110
No diode, 2k
resistor
101
01010
One diode, 2k
resistor
101
00111
No diode, 4k
resistor
101
01011
One diode, 4k
resistor
000
00000
Initial default value—disabled
Table 5. Trickle-Charge Register
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1390U-33/V+ | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Low-Voltage SPI/3-Wire RTCs with Trickle Charger |
| DS1390U-33/V+T | 制造商:Maxim Integrated Products 功能描述:SERIAL RTC 3.3V USOP PBFREE T&R AUTOMOTIVE - Tape and Reel |
| DS1390U-33+ | 功能描述:实时时钟 Low-V SPI/3-Wire With Trickle Charger 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 |
| DS1390U-33+T&R | 制造商:Maxim Integrated Products 功能描述:SERIAL RTC 33V USOP 制造商:Maxim Integrated Products 功能描述:REAL TIME CLOCK SERL 10USOP - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC RTC W/CHARGER 10-USOP 制造商:Maxim Integrated Products 功能描述:IC RTC W/CHARGER 10USOP |
| DS1390U-33+T&R | 功能描述:实时时钟 Low-V SPI/3-Wire With Trickle Charger 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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