- 您现在的位置：买卖IC网 > PDF目录97859 > DS1254Y (DALLAS SEMICONDUCTOR) 0 TIMER(S), REAL TIME CLOCK, PBGA168 PDF资料下载
参数资料
| 型号： | DS1254Y |
| 厂商： | DALLAS SEMICONDUCTOR |
| 元件分类： | Timer or RTC |
| 英文描述： | 0 TIMER(S), REAL TIME CLOCK, PBGA168 |
| 封装： | BGA-168 |
| 文件页数： | 14/17页 |
| 文件大小： | 161K |
| 代理商： | DS1254Y |
DS1254
6 of 17
AM-PM/12/24 MODE
Bit 7 of the hours register is defined as the 12- or 24-hour mode select bit. When high, the 12-hour mode
is selected. In the 12-hour mode, bit 5 is the AM/PM bit with logic high being PM. In the 24-hour mode,
bit 5 is the second 10-hour bit (20-23 hours).
OSCILLATOR BIT
Bit 5 of the day register controls the oscillator. When set to logic 1, the oscillator is off. When set to
logic 0, the oscillator turns on and the watch becomes operational.
ZERO BITS
Registers 1, 2, 3, 4, 5, and 6 contain one or more bits which will always read logic 0. When writing these
locations, either a logic 1 or 0 is acceptable.
BATTERY MONITORING
The DS1254 automatically monitors the battery in an attached DS3800 Battery Cap on a 24-hour time
interval. Such monitoring begins within tREC after VCC rises above VPF and is suspended when power
failure occurs.
After each 24-hour period has elapsed, the battery is connected to an internal 1 M
test resistor for one
second. During this one second, if the battery voltage falls below the battery voltage trip point (~2.6V),
the battery warning output BW is asserted. Once asserted, BW remains active until the attached DS3800
Battery Cap is replaced. However, the battery is still re-tested after each VCC power-up, even if was
active on power-down. If the battery voltage is found to be higher than ~2.6V during such testing, BW is
de-asserted and regular testing resumes. BW has an open-drain output driver.
相关PDF资料 |
PDF描述 |
|---|---|
| DS1284 | 1 TIMER(S), REAL TIME CLOCK, PDIP28 |
| DS1284QN | 1 TIMER(S), REAL TIME CLOCK, PQCC28 |
| DS1286 | 1 TIMER(S), REAL TIME CLOCK, DIP28 |
| DS12885 | 1 TIMER(S), REAL TIME CLOCK, PDIP24 |
| DS12885T | 1 TIMER(S), REAL TIME CLOCK, PQFP32 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1254YB-100 | 功能描述:IC NVSRAM 16MBIT 100NS 168BGA RoHS:否 类别:集成电路 (IC) >> 时钟/计时 - 实时时钟 系列:- 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:- 类型:时钟/日历 特点:警报器，闰年，SRAM 存储容量:- 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:2 V ~ 5.5 V 电压 - 电源，电池:- 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-WDFN 裸露焊盘 供应商设备封装:8-TDFN EP 包装:管件 |
| DS1254YB2-100 | 功能描述:实时时钟 2M X 8 NV SRAM w/Phantom Clock 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 |
| DS125-6-2G | 制造商:Electronic Hardware Corporation (EHC) 功能描述:CRANK HANDLE ROUND KNOB 6.35MM 制造商:EHC (ELECTRONIC HARDWARE) 功能描述:CRANK HANDLE ROUND KNOB, 6.35MM 制造商:EHC (ELECTRONIC HARDWARE) 功能描述:CRANK HANDLE ROUND KNOB, 6.35MM; Knob / Dial Style:Round with Crank Handle; Shaft Diameter:6.35mm; Knob Diameter:31.75mm; Shaft Type:Round; Knob Material:Plastic; Shaft Size:1/4 (6.35) in. (mm) ;RoHS Compliant: Yes |
| DS1258AB-100 | 功能描述:NVRAM RoHS:否 制造商:Maxim Integrated 数据总线宽度:8 bit 存储容量:1024 Kbit 组织:128 K x 8 接口类型:Parallel 访问时间:70 ns 电源电压-最大:5.5 V 电源电压-最小:4.5 V 工作电流:85 mA 最大工作温度:+ 70 C 最小工作温度:0 C 封装 / 箱体:EDIP 封装:Tube |
| DS1258AB-100# | 功能描述:NVRAM RoHS:否 制造商:Maxim Integrated 数据总线宽度:8 bit 存储容量:1024 Kbit 组织:128 K x 8 接口类型:Parallel 访问时间:70 ns 电源电压-最大:5.5 V 电源电压-最小:4.5 V 工作电流:85 mA 最大工作温度:+ 70 C 最小工作温度:0 C 封装 / 箱体:EDIP 封装:Tube |
发布紧急采购，3分钟左右您将得到回复。