- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄9321 > DS1747WP-120IND (Maxim Integrated Products)IC RTC RAM Y2K 3.3V 120NS 34-PCM PDF資料下載
參數(shù)資料
| 型號(hào)： | DS1747WP-120IND |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 11/16頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC RTC RAM Y2K 3.3V 120NS 34-PCM |
| 標(biāo)準(zhǔn)包裝： | 40 |
| 類型： | 時(shí)鐘/日歷 |
| 特點(diǎn)： | 閏年，NVSRAM，Y2K |
| 存儲(chǔ)容量： | 512KB |
| 時(shí)間格式： | HH:MM:SS（24 小時(shí)） |
| 數(shù)據(jù)格式： | YY-MM-DD-dd |
| 接口： | 并聯(lián) |
| 電源電壓： | 2.97 V ~ 3.63 V |
| 電壓 - 電源，電池： | 3V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 34-PowerCap? 模塊 |
| 供應(yīng)商設(shè)備封裝： | 34-PowerCap 模塊 |
| 包裝： | 管件 |
DS1747/DS1747P Y2K-Compliant, Nonvolatile Timekeeping RAMs
4 of 16
Figure 1. Block Diagram
PACKAGES
The DS1747 is available in two packages (32-pin DIP and 34-pin PowerCap module). The 32-pin DIP
style module integrates the crystal, lithium energy source, and silicon all in one package. The 34-pin
PowerCap Module Board is designed with contacts for connection to a separate PowerCap
(DS9034PCX) that contains the crystal and battery. This design allows the Power-Cap to be mounted on
top of the DS1747P after the completion of the surface mount process. Mounting the PowerCap after the
surface mount process prevents damage to the crystal and battery due to the high temperatures required
for solder reflow. The PowerCap is keyed to prevent reverse insertion. The PowerCap Module Board
and PowerCap are ordered separately and shipped in separate containers.
TIME AND DATE OPERATIONS
The contents of the time and date registers are in BCD format. The day-of-week register increments at
midnight. Values that correspond to the day of week are user-defined, but must be sequential (i.e., if 1
equals Sunday, then 2 equals Monday and so on). Illogical time and date entries result in undefined
operation.
CLOCK OPERATIONS—READING THE CLOCK
While the double-buffered register structure reduces the chance of reading incorrect data, internal
updates to the DS1747 clock registers should be halted before clock data is read to prevent reading of
data in transition. However, halting the internal clock register updating process does not affect clock
accuracy. Updating is halted when a one is written into the read bit, bit 6 of the century register (see
Table 2). As long as a one remains in that position, updating is halted. After a halt is issued, the registers
reflect the count, that is day, date, and time that was current at the moment the halt command was
issued. However, the internal clock registers of the double-buffered system continue to update so that
the clock accuracy is not affected by the access of data. All the DS1747 registers are updated
simultaneously after the internal clock register updating process has been re-enabled. Updating is within
a second after the read bit is written to zero. The READ bit must be set to a zero for a minimum of
500s to ensure the external registers will be updated.
Maxim
DS1747
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MCP4441-502E/ML | IC DGTL POT 129TAPS QUAD 20QFN |
| VI-BNL-IU-F1 | CONVERTER MOD DC/DC 28V 200W |
| VI-BNK-IU-F2 | CONVERTER MOD DC/DC 40V 200W |
| VI-BNK-IU-F1 | CONVERTER MOD DC/DC 40V 200W |
| VI-BN2-MY-F4 | CONVERTER MOD DC/DC 15V 50W |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1747WP-120IND+ | 功能描述:實(shí)時(shí)時(shí)鐘 Timekeeping NV RAM 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 |
| DS1747WP-C01 | 功能描述:實(shí)時(shí)時(shí)鐘 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 |
| DS1747WP-C03+ | 功能描述:實(shí)時(shí)時(shí)鐘 Timekeeping NV RAM 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 |
| DS1747WP-C2 | 功能描述:實(shí)時(shí)時(shí)鐘 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 |
| DS17485 | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:3V/5V Real-Time Clock |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。