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參數(shù)資料
| 型號(hào)： | DS1254Y |
| 廠商： | DALLAS SEMICONDUCTOR |
| 元件分類(lèi)： | Timer or RTC |
| 英文描述： | 0 TIMER(S), REAL TIME CLOCK, PBGA168 |
| 封裝： | BGA-168 |
| 文件頁(yè)數(shù)： | 14/17頁(yè) |
| 文件大?。?/td> | 161K |
| 代理商： | DS1254Y |
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DS1254
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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.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1254YB-100 | 功能描述:IC NVSRAM 16MBIT 100NS 168BGA RoHS:否 類(lèi)別:集成電路 (IC) >> 時(shí)鐘/計(jì)時(shí) - 實(shí)時(shí)時(shí)鐘 系列:- 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- 類(lèi)型:時(shí)鐘/日歷 特點(diǎn):警報(bào)器，閏年，SRAM 存儲(chǔ)容量:- 時(shí)間格式:HH:MM:SS（12/24 小時(shí)） 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(lèi)型:表面貼裝 封裝/外殼:8-WDFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:8-TDFN EP 包裝:管件 |
| DS1254YB2-100 | 功能描述:實(shí)時(shí)時(shí)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(shí)間格式:HH:MM:SS RTC 存儲(chǔ)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 |
| 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 數(shù)據(jù)總線寬度:8 bit 存儲(chǔ)容量:1024 Kbit 組織:128 K x 8 接口類(lèi)型:Parallel 訪問(wèn)時(shí)間:70 ns 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 工作電流:85 mA 最大工作溫度:+ 70 C 最小工作溫度:0 C 封裝 / 箱體:EDIP 封裝:Tube |
| DS1258AB-100# | 功能描述:NVRAM RoHS:否 制造商:Maxim Integrated 數(shù)據(jù)總線寬度:8 bit 存儲(chǔ)容量:1024 Kbit 組織:128 K x 8 接口類(lèi)型:Parallel 訪問(wèn)時(shí)間:70 ns 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 工作電流:85 mA 最大工作溫度:+ 70 C 最小工作溫度:0 C 封裝 / 箱體:EDIP 封裝:Tube |
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