- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄97859 > DS1254W (MAXIM INTEGRATED PRODUCTS INC) 0 TIMER(S), REAL TIME CLOCK, PBGA168 PDF資料下載
參數(shù)資料
| 型號： | DS1254W |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | Timer or RTC |
| 英文描述： | 0 TIMER(S), REAL TIME CLOCK, PBGA168 |
| 封裝： | BGA-168 |
| 文件頁數(shù)： | 14/17頁 |
| 文件大?。?/td> | 330K |
| 代理商： | DS1254W |
DS1254
6 of 17
AM/PM/12/24 MODE
Bit 7 of the hours register is defined as the 12-hour 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 that will always read logic 0. When writing these
locations, either a logic 1 or logic 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 1M
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 retested 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.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DS1254Y | 0 TIMER(S), REAL TIME CLOCK, PBGA168 |
| 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 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1254WB-150 | 功能描述:IC NVSRAM 16MBIT 150NS 168BGA RoHS:否 類別:集成電路 (IC) >> 時鐘/計時 - 實時時鐘 系列:- 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- 類型:時鐘/日歷 特點:警報器，閏年，SRAM 存儲容量:- 時間格式:HH:MM:SS（12/24 小時） 數(shù)據(jù)格式:YY-MM-DD-dd 接口:SPI 電源電壓:2 V ~ 5.5 V 電壓 - 電源，電池:- 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-WDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:8-TDFN EP 包裝:管件 |
| DS1254WB2-150 | 功能描述:實時時鐘 2M X 8 NV SRAM w/Phantom Clock RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時間格式:HH:MM:SS RTC 存儲容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| DS1254WB-C01 | 功能描述:實時時鐘 2M X 8 NV SRAM w/Phantom Clock RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時間格式:HH:MM:SS RTC 存儲容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| DS1254WB-C02 | 功能描述:實時時鐘 2M X 8 NV SRAM w/Phantom Clock RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時間格式:HH:MM:SS RTC 存儲容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| DS1254YB-100 | 功能描述:IC NVSRAM 16MBIT 100NS 168BGA RoHS:否 類別:集成電路 (IC) >> 時鐘/計時 - 實時時鐘 系列:- 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- 類型:時鐘/日歷 特點:警報器，閏年，SRAM 存儲容量:- 時間格式:HH:MM:SS（12/24 小時） 數(shù)據(jù)格式:YY-MM-DD-dd 接口:SPI 電源電壓:2 V ~ 5.5 V 電壓 - 電源，電池:- 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-WDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:8-TDFN EP 包裝:管件 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。